[PATCH 0/4] Add pinctrl support to Broadcom Cygnus SoC

[PATCH 0/4] Add pinctrl support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial pinctrl support for the Broadcom Cygnus SoC.
The Cygnus pinctrl controller supports group based alternate function configuration

Ray Jui (4):
  pinctrl: Broadcom Cygnus pinctrl device tree binding
  pinctrl: cygnus: add initial pinctrl support
  ARM: mach-bcm: enable pinctrl support for Cygnus
  ARM: dts: enable pinctrl for Broadcom Cygnus

 .../bindings/pinctrl/brcm,cygnus-pinctrl.txt       |   92 +++
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |    5 +
 arch/arm/mach-bcm/Kconfig                          |    1 +
 drivers/pinctrl/Kconfig                            |    7 +
 drivers/pinctrl/Makefile                           |    1 +
 drivers/pinctrl/pinctrl-bcm-cygnus.c               |  753 ++++++++++++++++++++
 6 files changed, 859 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
 create mode 100644 drivers/pinctrl/pinctrl-bcm-cygnus.c

-- 
1.7.9.5

[PATCH 1/4] pinctrl: Broadcom Cygnus pinctrl device tree binding

[Ray Jui]

Device tree binding documentation for Broadcom Cygnus pinctrl driver

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 .../bindings/pinctrl/brcm,cygnus-pinctrl.txt       |   92 ++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
new file mode 100644
index 0000000..86e4579
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
@@ -0,0 +1,92 @@
+Broadcom Cygnus Pin Controller
+
+The Cygnus pin controller supports setting the alternate functions of groups
+of pins. Pinmux configuration on individual pins is not supported by the
+Cygnus A0 SoC.
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-pinctrl"
+
+- reg:
+    Define the base and range of the I/O address space that contain the Cygnus
+pin control registers
+
+- brcm,groups:
+    This can be strings of one or more group names. This defines the group(s)
+that one wants to configure
+
+- brcm,function:
+    This is the alternate function that one wants to configure to. Valid
+alternate functions are "alt1", "alt2", "alt3", "alt4"
+
+Each child node represents a configuration. Client devices reference the the
+child node to enable the mux configuration.
+
+For example:
+
+	pinctrl: pinctrl@0x0301d0c8 {
+		compatible = "brcm,cygnus-pinctrl";
+		reg = <0x0301d0c8 0x2c>;
+
+		i2s_0: i2s_0 {
+			brcm,groups = "smart_card0", "smart_card0_fcb";
+			brcm,function = "alt2";
+		};
+
+		i2s_1: i2s_1 {
+			brcm,groups = "smart_card1", "smart_card1_fcb";
+			brcm,function = "alt2";
+		};
+
+		spi_0: spi_0 {
+			brcm,groups = "spi0";
+			brcm,function = "alt1";
+		};
+	}
+
+	spi0@18028000 {
+			compatible = "arm,pl022", "arm,primecell";
+			reg = <0x18028000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+			pinctrl-0 = <&spi_0>;
+			clocks = <&axi81_clk>;
+			clock-names = "apb_pclk";
+	};
+
+Consider the following snapshot of Cygnus pinmux table:
+
+number    pin            group              alt1             alt2        alt3        alt4
+------    ---            ----               ----             ----        ----        ----
+42        sc0_clk        smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio24
+43        sc0_cmdvcc_l   smart_card0        SMART CARD0      I2S_0       N/A         STRAP
+44        sc0_detect     smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio25
+45        sc0_fcb        smart_card0_fcb    SMART CARD0_FCB  I2S_0       N/A         chip_gpio26
+46        sc0_io         smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio27
+47        sc0_rst_l      smart_card0        SMART CARD0      SPDIF       N/A         STRAP
+
+Note due to limitation of the Cygnus hardware, pinmux configuration can only
+be group based. To enable I2S_0 function, one needs the following child node
+configuration:
+
+	i2s_0: i2s_0 {
+		brcm,groups = "smart_card0", "smart_card0_fcb";
+		brcm,function = "alt2";
+	};
+
+This tells the Cygnus pin controller to configure groups "smart_card0" and
+"smart_card0_fcb" to I2S_0. With this configuration, pins 42, 43, 44, 45, 46
+become I2C_0, and pin 47 becomes SPDIF
+
+Consider another example, that one wants to configure the above pins as GPIO:
+
+	gpio_24_27: gpio_24_27 {
+		brcm,groups = "smart_card0", "smart_card0_fcb";
+		brcm,function = "alt4";
+	};
+
+With the above configuration, pins 42, 44, 45, 46 become GPIO, and 43 and 47
+become reserved for STRAP
-- 
1.7.9.5

Re: [PATCH 1/4] pinctrl: Broadcom Cygnus pinctrl device tree binding

[Belisko Marek]

On Thu, Dec 4, 2014 at 10:56 PM, Ray Jui <rjui@broadcom.com> wrote:
> Device tree binding documentation for Broadcom Cygnus pinctrl driver
>
> Signed-off-by: Ray Jui <rjui@broadcom.com>
> Reviewed-by: Scott Branden <sbranden@broadcom.com>
> ---
>  .../bindings/pinctrl/brcm,cygnus-pinctrl.txt       |   92 ++++++++++++++++++++
>  1 file changed, 92 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
>
> diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
> new file mode 100644
> index 0000000..86e4579
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
> @@ -0,0 +1,92 @@
> +Broadcom Cygnus Pin Controller
> +
> +The Cygnus pin controller supports setting the alternate functions of groups
> +of pins. Pinmux configuration on individual pins is not supported by the
> +Cygnus A0 SoC.
> +
> +Required properties:
> +
> +- compatible:
> +    Must be "brcm,cygnus-pinctrl"
> +
> +- reg:
> +    Define the base and range of the I/O address space that contain the Cygnus
> +pin control registers
> +
> +- brcm,groups:
> +    This can be strings of one or more group names. This defines the group(s)
> +that one wants to configure
> +
> +- brcm,function:
> +    This is the alternate function that one wants to configure to. Valid
> +alternate functions are "alt1", "alt2", "alt3", "alt4"
> +
> +Each child node represents a configuration. Client devices reference the the
> +child node to enable the mux configuration.
> +
> +For example:
> +
> +       pinctrl: pinctrl@0x0301d0c8 {
> +               compatible = "brcm,cygnus-pinctrl";
> +               reg = <0x0301d0c8 0x2c>;
> +
> +               i2s_0: i2s_0 {
> +                       brcm,groups = "smart_card0", "smart_card0_fcb";
> +                       brcm,function = "alt2";
> +               };
> +
> +               i2s_1: i2s_1 {
> +                       brcm,groups = "smart_card1", "smart_card1_fcb";
> +                       brcm,function = "alt2";
> +               };
> +
> +               spi_0: spi_0 {
> +                       brcm,groups = "spi0";
> +                       brcm,function = "alt1";
> +               };
> +       }
> +
> +       spi0@18028000 {
> +                       compatible = "arm,pl022", "arm,primecell";
> +                       reg = <0x18028000 0x1000>;
> +                       #address-cells = <1>;
> +                       #size-cells = <0>;
> +                       interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
> +                       pinctrl-0 = <&spi_0>;
> +                       clocks = <&axi81_clk>;
> +                       clock-names = "apb_pclk";
> +       };
> +
> +Consider the following snapshot of Cygnus pinmux table:
> +
> +number    pin            group              alt1             alt2        alt3        alt4
> +------    ---            ----               ----             ----        ----        ----
> +42        sc0_clk        smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio24
> +43        sc0_cmdvcc_l   smart_card0        SMART CARD0      I2S_0       N/A         STRAP
> +44        sc0_detect     smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio25
> +45        sc0_fcb        smart_card0_fcb    SMART CARD0_FCB  I2S_0       N/A         chip_gpio26
> +46        sc0_io         smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio27
> +47        sc0_rst_l      smart_card0        SMART CARD0      SPDIF       N/A         STRAP
> +
> +Note due to limitation of the Cygnus hardware, pinmux configuration can only
> +be group based. To enable I2S_0 function, one needs the following child node
> +configuration:
> +
> +       i2s_0: i2s_0 {
> +               brcm,groups = "smart_card0", "smart_card0_fcb";
> +               brcm,function = "alt2";
> +       };
> +
> +This tells the Cygnus pin controller to configure groups "smart_card0" and
> +"smart_card0_fcb" to I2S_0. With this configuration, pins 42, 43, 44, 45, 46
> +become I2C_0, and pin 47 becomes SPDIF
                  ^^^^ typo - should be I2S_0
> +
> +Consider another example, that one wants to configure the above pins as GPIO:
> +
> +       gpio_24_27: gpio_24_27 {
> +               brcm,groups = "smart_card0", "smart_card0_fcb";
> +               brcm,function = "alt4";
> +       };
> +
> +With the above configuration, pins 42, 44, 45, 46 become GPIO, and 43 and 47
> +become reserved for STRAP
> --
> 1.7.9.5
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

BR,

marek

-- 
as simple and primitive as possible
-------------------------------------------------
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Freelance Developer

Ruska Nova Ves 219 | Presov, 08005 Slovak Republic
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skype: marekwhite
twitter: #opennandra
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Re: [PATCH 1/4] pinctrl: Broadcom Cygnus pinctrl device tree binding

[Ray Jui]

On 12/4/2014 2:16 PM, Belisko Marek wrote:
> On Thu, Dec 4, 2014 at 10:56 PM, Ray Jui <rjui@broadcom.com> wrote:
>> Device tree binding documentation for Broadcom Cygnus pinctrl driver
>>
>> Signed-off-by: Ray Jui <rjui@broadcom.com>
>> Reviewed-by: Scott Branden <sbranden@broadcom.com>
>> ---
>>   .../bindings/pinctrl/brcm,cygnus-pinctrl.txt       |   92 ++++++++++++++++++++
>>   1 file changed, 92 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
>>
>> diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
>> new file mode 100644
>> index 0000000..86e4579
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
>> @@ -0,0 +1,92 @@
>> +Broadcom Cygnus Pin Controller
>> +
>> +The Cygnus pin controller supports setting the alternate functions of groups
>> +of pins. Pinmux configuration on individual pins is not supported by the
>> +Cygnus A0 SoC.
>> +
>> +Required properties:
>> +
>> +- compatible:
>> +    Must be "brcm,cygnus-pinctrl"
>> +
>> +- reg:
>> +    Define the base and range of the I/O address space that contain the Cygnus
>> +pin control registers
>> +
>> +- brcm,groups:
>> +    This can be strings of one or more group names. This defines the group(s)
>> +that one wants to configure
>> +
>> +- brcm,function:
>> +    This is the alternate function that one wants to configure to. Valid
>> +alternate functions are "alt1", "alt2", "alt3", "alt4"
>> +
>> +Each child node represents a configuration. Client devices reference the the
>> +child node to enable the mux configuration.
>> +
>> +For example:
>> +
>> +       pinctrl: pinctrl@0x0301d0c8 {
>> +               compatible = "brcm,cygnus-pinctrl";
>> +               reg = <0x0301d0c8 0x2c>;
>> +
>> +               i2s_0: i2s_0 {
>> +                       brcm,groups = "smart_card0", "smart_card0_fcb";
>> +                       brcm,function = "alt2";
>> +               };
>> +
>> +               i2s_1: i2s_1 {
>> +                       brcm,groups = "smart_card1", "smart_card1_fcb";
>> +                       brcm,function = "alt2";
>> +               };
>> +
>> +               spi_0: spi_0 {
>> +                       brcm,groups = "spi0";
>> +                       brcm,function = "alt1";
>> +               };
>> +       }
>> +
>> +       spi0@18028000 {
>> +                       compatible = "arm,pl022", "arm,primecell";
>> +                       reg = <0x18028000 0x1000>;
>> +                       #address-cells = <1>;
>> +                       #size-cells = <0>;
>> +                       interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
>> +                       pinctrl-0 = <&spi_0>;
>> +                       clocks = <&axi81_clk>;
>> +                       clock-names = "apb_pclk";
>> +       };
>> +
>> +Consider the following snapshot of Cygnus pinmux table:
>> +
>> +number    pin            group              alt1             alt2        alt3        alt4
>> +------    ---            ----               ----             ----        ----        ----
>> +42        sc0_clk        smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio24
>> +43        sc0_cmdvcc_l   smart_card0        SMART CARD0      I2S_0       N/A         STRAP
>> +44        sc0_detect     smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio25
>> +45        sc0_fcb        smart_card0_fcb    SMART CARD0_FCB  I2S_0       N/A         chip_gpio26
>> +46        sc0_io         smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio27
>> +47        sc0_rst_l      smart_card0        SMART CARD0      SPDIF       N/A         STRAP
>> +
>> +Note due to limitation of the Cygnus hardware, pinmux configuration can only
>> +be group based. To enable I2S_0 function, one needs the following child node
>> +configuration:
>> +
>> +       i2s_0: i2s_0 {
>> +               brcm,groups = "smart_card0", "smart_card0_fcb";
>> +               brcm,function = "alt2";
>> +       };
>> +
>> +This tells the Cygnus pin controller to configure groups "smart_card0" and
>> +"smart_card0_fcb" to I2S_0. With this configuration, pins 42, 43, 44, 45, 46
>> +become I2C_0, and pin 47 becomes SPDIF
>                    ^^^^ typo - should be I2S_0
Oh yeah. Will change from I2C_0 to I2S_0. Thanks.
>> +
>> +Consider another example, that one wants to configure the above pins as GPIO:
>> +
>> +       gpio_24_27: gpio_24_27 {
>> +               brcm,groups = "smart_card0", "smart_card0_fcb";
>> +               brcm,function = "alt4";
>> +       };
>> +
>> +With the above configuration, pins 42, 44, 45, 46 become GPIO, and 43 and 47
>> +become reserved for STRAP
>> --
>> 1.7.9.5
>>
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
> BR,
>
> marek
>

[PATCH 2/4] pinctrl: cygnus: add initial pinctrl support

[Ray Jui]

This adds the initial driver support for the Broadcom Cygnus pinctrl
controller. The Cygnus pinctrl controller supports group based
alternate function configuration

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---
 drivers/pinctrl/Kconfig              |    7 +
 drivers/pinctrl/Makefile             |    1 +
 drivers/pinctrl/pinctrl-bcm-cygnus.c |  753 ++++++++++++++++++++++++++++++++++
 3 files changed, 761 insertions(+)
 create mode 100644 drivers/pinctrl/pinctrl-bcm-cygnus.c

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index d014f22..4549e9f 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -85,6 +85,13 @@ config PINCTRL_BCM281XX
 	  BCM28145, and BCM28155 SoCs.  This driver requires the pinctrl
 	  framework.  GPIO is provided by a separate GPIO driver.
 
+config PINCTRL_BCM_CYGNUS
+	bool "Broadcom Cygnus pinctrl driver"
+	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+
 config PINCTRL_LANTIQ
 	bool
 	depends on LANTIQ
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index c030b3d..4ed8e8a 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_PINCTRL_BF60x)	+= pinctrl-adi2-bf60x.o
 obj-$(CONFIG_PINCTRL_AT91)	+= pinctrl-at91.o
 obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
 obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
+obj-$(CONFIG_PINCTRL_BCM_CYGNUS)	+= pinctrl-bcm-cygnus.o
 obj-$(CONFIG_PINCTRL_FALCON)	+= pinctrl-falcon.o
 obj-$(CONFIG_PINCTRL_PALMAS)	+= pinctrl-palmas.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP)	+= pinctrl-rockchip.o
diff --git a/drivers/pinctrl/pinctrl-bcm-cygnus.c b/drivers/pinctrl/pinctrl-bcm-cygnus.c
new file mode 100644
index 0000000..eb6e27a
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-bcm-cygnus.c
@@ -0,0 +1,753 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/slab.h>
+
+#include "core.h"
+#include "pinctrl-utils.h"
+
+/*
+ * Alternate function configuration
+ *
+ * @name: name of the alternate function
+ * @group_names: array of strings of group names that can be supported by this
+ * alternate function
+ * @num_groups: total number of groups that can be supported by this alternate
+ * function
+ * @mux: mux setting for this alternate function to be programed
+ */
+struct cygnus_pin_function {
+	const char *name;
+	const char * const *group_names;
+	const unsigned num_groups;
+	unsigned int mux;
+};
+
+/*
+ * Cygnus allows group based pinmux configuration
+ *
+ * @name: name of the group
+ * @pins: array of pins used by this group
+ * @num_pins: total number of pins used by this group
+ * @offset: register offset for pinmux configuration of this group
+ * @shift: bit shift for pinmux configuration of this group
+ */
+struct cygnus_pin_group {
+	const char *name;
+	const unsigned *pins;
+	const unsigned num_pins;
+	const unsigned int offset;
+	const unsigned int shift;
+};
+
+/*
+ * Cygnus pinctrl core
+ *
+ * @pctl: pointer to pinctrl_dev
+ * @dev: pointer to the device
+ * @base: I/O register base for Cygnus pinctrl configuration
+ *
+ */
+struct cygnus_pinctrl {
+	struct pinctrl_dev *pctl;
+	struct device *dev;
+	void __iomem *base;
+
+	const struct pinctrl_pin_desc *pins;
+	unsigned num_pins;
+
+	const struct cygnus_pin_group *groups;
+	unsigned num_groups;
+
+	const struct cygnus_pin_function *functions;
+	unsigned num_functions;
+};
+
+#define CYGNUS_PIN_GROUP(group_name, off, sh)		\
+{							\
+	.name = #group_name,				\
+	.pins = group_name##_pins,			\
+	.num_pins = ARRAY_SIZE(group_name##_pins),	\
+	.offset = off,					\
+	.shift = sh,					\
+}
+
+/*
+ * The following pin description is based on Cygnus I/O MUX spreadsheet
+ */
+static const struct pinctrl_pin_desc cygnus_pinctrl_pins[] = {
+	PINCTRL_PIN(0, "ext_device_reset_n"),
+	PINCTRL_PIN(1, "chip_mode0"),
+	PINCTRL_PIN(2, "chip_mode1"),
+	PINCTRL_PIN(3, "chip_mode2"),
+	PINCTRL_PIN(4, "chip_mode3"),
+	PINCTRL_PIN(5, "chip_mode4"),
+	PINCTRL_PIN(6, "bsc0_scl"),
+	PINCTRL_PIN(7, "bsc0_sda"),
+	PINCTRL_PIN(8, "bsc1_scl"),
+	PINCTRL_PIN(9, "bsc1_sda"),
+	PINCTRL_PIN(10, "d1w_dq"),
+	PINCTRL_PIN(11, "d1wowstz_l"),
+	PINCTRL_PIN(12, "gpio0"),
+	PINCTRL_PIN(13, "gpio1"),
+	PINCTRL_PIN(14, "gpio2"),
+	PINCTRL_PIN(15, "gpio3"),
+	PINCTRL_PIN(16, "gpio4"),
+	PINCTRL_PIN(17, "gpio5"),
+	PINCTRL_PIN(18, "gpio6"),
+	PINCTRL_PIN(19, "gpio7"),
+	PINCTRL_PIN(20, "gpio8"),
+	PINCTRL_PIN(21, "gpio9"),
+	PINCTRL_PIN(22, "gpio10"),
+	PINCTRL_PIN(23, "gpio11"),
+	PINCTRL_PIN(24, "gpio12"),
+	PINCTRL_PIN(25, "gpio13"),
+	PINCTRL_PIN(26, "gpio14"),
+	PINCTRL_PIN(27, "gpio15"),
+	PINCTRL_PIN(28, "gpio16"),
+	PINCTRL_PIN(29, "gpio17"),
+	PINCTRL_PIN(30, "gpio18"),
+	PINCTRL_PIN(31, "gpio19"),
+	PINCTRL_PIN(32, "gpio20"),
+	PINCTRL_PIN(33, "gpio21"),
+	PINCTRL_PIN(34, "gpio22"),
+	PINCTRL_PIN(35, "gpio23"),
+	PINCTRL_PIN(36, "mdc"),
+	PINCTRL_PIN(37, "mdio"),
+	PINCTRL_PIN(38, "pwm0"),
+	PINCTRL_PIN(39, "pwm1"),
+	PINCTRL_PIN(40, "pwm2"),
+	PINCTRL_PIN(41, "pwm3"),
+	PINCTRL_PIN(42, "sc0_clk"),
+	PINCTRL_PIN(43, "sc0_cmdvcc_l"),
+	PINCTRL_PIN(44, "sc0_detect"),
+	PINCTRL_PIN(45, "sc0_fcb"),
+	PINCTRL_PIN(46, "sc0_io"),
+	PINCTRL_PIN(47, "sc0_rst_l"),
+	PINCTRL_PIN(48, "sc1_clk"),
+	PINCTRL_PIN(49, "sc1_cmdvcc_l"),
+	PINCTRL_PIN(50, "sc1_detect"),
+	PINCTRL_PIN(51, "sc1_fcb"),
+	PINCTRL_PIN(52, "sc1_io"),
+	PINCTRL_PIN(53, "sc1_rst_l"),
+	PINCTRL_PIN(54, "spi0_clk"),
+	PINCTRL_PIN(55, "spi0_mosi"),
+	PINCTRL_PIN(56, "spi0_miso"),
+	PINCTRL_PIN(57, "spi0_ss"),
+	PINCTRL_PIN(58, "spi1_clk"),
+	PINCTRL_PIN(59, "spi1_mosi"),
+	PINCTRL_PIN(60, "spi1_miso"),
+	PINCTRL_PIN(61, "spi1_ss"),
+	PINCTRL_PIN(62, "spi2_clk"),
+	PINCTRL_PIN(63, "spi2_mosi"),
+	PINCTRL_PIN(64, "spi2_miso"),
+	PINCTRL_PIN(65, "spi2_ss"),
+	PINCTRL_PIN(66, "spi3_clk"),
+	PINCTRL_PIN(67, "spi3_mosi"),
+	PINCTRL_PIN(68, "spi3_miso"),
+	PINCTRL_PIN(69, "spi3_ss"),
+	PINCTRL_PIN(70, "uart0_cts"),
+	PINCTRL_PIN(71, "uart0_rts"),
+	PINCTRL_PIN(72, "uart0_rx"),
+	PINCTRL_PIN(73, "uart0_tx"),
+	PINCTRL_PIN(74, "uart1_cts"),
+	PINCTRL_PIN(75, "uart1_dcd"),
+	PINCTRL_PIN(76, "uart1_dsr"),
+	PINCTRL_PIN(77, "uart1_dtr"),
+	PINCTRL_PIN(78, "uart1_ri"),
+	PINCTRL_PIN(79, "uart1_rts"),
+	PINCTRL_PIN(80, "uart1_rx"),
+	PINCTRL_PIN(81, "uart1_tx"),
+	PINCTRL_PIN(82, "uart3_rx"),
+	PINCTRL_PIN(83, "uart3_tx"),
+	PINCTRL_PIN(84, "sdio1_clk_sdcard"),
+	PINCTRL_PIN(85, "sdio1_cmd"),
+	PINCTRL_PIN(86, "sdio1_data0"),
+	PINCTRL_PIN(87, "sdio1_data1"),
+	PINCTRL_PIN(88, "sdio1_data2"),
+	PINCTRL_PIN(89, "sdio1_data3"),
+	PINCTRL_PIN(90, "sdio1_wp_n"),
+	PINCTRL_PIN(91, "sdio1_card_rst"),
+	PINCTRL_PIN(92, "sdio1_led_on"),
+	PINCTRL_PIN(93, "sdio1_cd"),
+	PINCTRL_PIN(94, "sdio0_clk_sdcard"),
+	PINCTRL_PIN(95, "sdio0_cmd"),
+	PINCTRL_PIN(96, "sdio0_data0"),
+	PINCTRL_PIN(97, "sdio0_data1"),
+	PINCTRL_PIN(98, "sdio0_data2"),
+	PINCTRL_PIN(99, "sdio0_data3"),
+	PINCTRL_PIN(100, "sdio0_wp_n"),
+	PINCTRL_PIN(101, "sdio0_card_rst"),
+	PINCTRL_PIN(102, "sdio0_led_on"),
+	PINCTRL_PIN(103, "sdio0_cd"),
+	PINCTRL_PIN(104, "sflash_clk"),
+	PINCTRL_PIN(105, "sflash_cs_l"),
+	PINCTRL_PIN(106, "sflash_mosi"),
+	PINCTRL_PIN(107, "sflash_miso"),
+	PINCTRL_PIN(108, "sflash_wp_n"),
+	PINCTRL_PIN(109, "sflash_hold_n"),
+	PINCTRL_PIN(110, "nand_ale"),
+	PINCTRL_PIN(111, "nand_ce0_l"),
+	PINCTRL_PIN(112, "nand_ce1_l"),
+	PINCTRL_PIN(113, "nand_cle"),
+	PINCTRL_PIN(114, "nand_dq0"),
+	PINCTRL_PIN(115, "nand_dq1"),
+	PINCTRL_PIN(116, "nand_dq2"),
+	PINCTRL_PIN(117, "nand_dq3"),
+	PINCTRL_PIN(118, "nand_dq4"),
+	PINCTRL_PIN(119, "nand_dq5"),
+	PINCTRL_PIN(120, "nand_dq6"),
+	PINCTRL_PIN(121, "nand_dq7"),
+	PINCTRL_PIN(122, "nand_rb_l"),
+	PINCTRL_PIN(123, "nand_re_l"),
+	PINCTRL_PIN(124, "nand_we_l"),
+	PINCTRL_PIN(125, "nand_wp_l"),
+	PINCTRL_PIN(126, "lcd_clac"),
+	PINCTRL_PIN(127, "lcd_clcp"),
+	PINCTRL_PIN(128, "lcd_cld0"),
+	PINCTRL_PIN(129, "lcd_cld1"),
+	PINCTRL_PIN(130, "lcd_cld10"),
+	PINCTRL_PIN(131, "lcd_cld11"),
+	PINCTRL_PIN(132, "lcd_cld12"),
+	PINCTRL_PIN(133, "lcd_cld13"),
+	PINCTRL_PIN(134, "lcd_cld14"),
+	PINCTRL_PIN(135, "lcd_cld15"),
+	PINCTRL_PIN(136, "lcd_cld16"),
+	PINCTRL_PIN(137, "lcd_cld17"),
+	PINCTRL_PIN(138, "lcd_cld18"),
+	PINCTRL_PIN(139, "lcd_cld19"),
+	PINCTRL_PIN(140, "lcd_cld2"),
+	PINCTRL_PIN(141, "lcd_cld20"),
+	PINCTRL_PIN(142, "lcd_cld21"),
+	PINCTRL_PIN(143, "lcd_cld22"),
+	PINCTRL_PIN(144, "lcd_cld23"),
+	PINCTRL_PIN(145, "lcd_cld3"),
+	PINCTRL_PIN(146, "lcd_cld4"),
+	PINCTRL_PIN(147, "lcd_cld5"),
+	PINCTRL_PIN(148, "lcd_cld6"),
+	PINCTRL_PIN(149, "lcd_cld7"),
+	PINCTRL_PIN(150, "lcd_cld8"),
+	PINCTRL_PIN(151, "lcd_cld9"),
+	PINCTRL_PIN(152, "lcd_clfp"),
+	PINCTRL_PIN(153, "lcd_clle"),
+	PINCTRL_PIN(154, "lcd_cllp"),
+	PINCTRL_PIN(155, "lcd_clpower"),
+	PINCTRL_PIN(156, "camera_vsync"),
+	PINCTRL_PIN(157, "camera_trigger"),
+	PINCTRL_PIN(158, "camera_strobe"),
+	PINCTRL_PIN(159, "camera_standby"),
+	PINCTRL_PIN(160, "camera_reset_n"),
+	PINCTRL_PIN(161, "camera_pixdata9"),
+	PINCTRL_PIN(162, "camera_pixdata8"),
+	PINCTRL_PIN(163, "camera_pixdata7"),
+	PINCTRL_PIN(164, "camera_pixdata6"),
+	PINCTRL_PIN(165, "camera_pixdata5"),
+	PINCTRL_PIN(166, "camera_pixdata4"),
+	PINCTRL_PIN(167, "camera_pixdata3"),
+	PINCTRL_PIN(168, "camera_pixdata2"),
+	PINCTRL_PIN(169, "camera_pixdata1"),
+	PINCTRL_PIN(170, "camera_pixdata0"),
+	PINCTRL_PIN(171, "camera_pixclk"),
+	PINCTRL_PIN(172, "camera_hsync"),
+	PINCTRL_PIN(173, "camera_pll_ref_clk"),
+	PINCTRL_PIN(174, "usb_id_indication"),
+	PINCTRL_PIN(175, "usb_vbus_indication"),
+	PINCTRL_PIN(176, "gpio0_3p3"),
+	PINCTRL_PIN(177, "gpio1_3p3"),
+	PINCTRL_PIN(178, "gpio2_3p3"),
+	PINCTRL_PIN(179, "gpio3_3p3"),
+};
+
+/*
+ * List of groups of pins
+ */
+static const unsigned gpio0_pins[] = { 12 };
+static const unsigned gpio1_pins[] = { 13 };
+static const unsigned gpio2_pins[] = { 14 };
+static const unsigned gpio3_pins[] = { 15 };
+static const unsigned gpio4_pins[] = { 16 };
+static const unsigned gpio5_pins[] = { 17 };
+static const unsigned gpio6_pins[] = { 18 };
+static const unsigned gpio7_pins[] = { 19 };
+static const unsigned gpio8_pins[] = { 20 };
+static const unsigned gpio9_pins[] = { 21 };
+static const unsigned gpio10_pins[] = { 22 };
+static const unsigned gpio11_pins[] = { 23 };
+static const unsigned gpio12_pins[] = { 24 };
+static const unsigned gpio13_pins[] = { 25 };
+static const unsigned gpio14_pins[] = { 26 };
+static const unsigned gpio15_pins[] = { 27 };
+static const unsigned gpio16_pins[] = { 28 };
+static const unsigned gpio17_pins[] = { 29 };
+static const unsigned gpio18_pins[] = { 30 };
+static const unsigned gpio19_pins[] = { 31 };
+static const unsigned gpio20_pins[] = { 32 };
+static const unsigned gpio21_pins[] = { 33 };
+static const unsigned gpio22_pins[] = { 34 };
+static const unsigned gpio23_pins[] = { 35 };
+static const unsigned pwm0_pins[] = { 38 };
+static const unsigned pwm1_pins[] = { 39 };
+static const unsigned pwm2_pins[] = { 40 };
+static const unsigned pwm3_pins[] = { 41 };
+static const unsigned sdio0_pins[] = { 94, 95, 96, 97, 98, 99 };
+static const unsigned smart_card0_pins[] = { 42, 43, 44, 46, 47 };
+static const unsigned smart_card1_pins[] = { 48, 49, 50, 52, 53 };
+static const unsigned spi0_pins[] = { 54, 55, 56, 57 };
+static const unsigned spi1_pins[] = { 58, 59, 60, 61 };
+static const unsigned spi2_pins[] = { 62, 63, 64, 65 };
+static const unsigned spi3_pins[] = { 66, 67, 68, 69 };
+static const unsigned d1w_pins[] = { 10, 11 };
+static const unsigned lcd_pins[] = { 126, 127, 128, 129, 130, 131, 132,	133,
+	134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
+	148, 149, 150, 151, 152, 153, 154, 155 };
+static const unsigned uart0_pins[] = { 70, 71, 72, 73 };
+static const unsigned uart1_dte_pins[] = { 75, 76, 77, 78 };
+static const unsigned uart1_pins[] = { 74, 79, 80, 81 };
+static const unsigned uart3_pins[] = { 82, 83 };
+static const unsigned qspi_pins[] = { 104, 105, 106, 107 };
+static const unsigned nand_pins[] = { 110, 111, 112, 113, 114, 115, 116, 117,
+	118, 119, 120, 121, 122, 123, 124, 125 };
+static const unsigned sdio0_cd_pins[] = { 103 };
+static const unsigned sdio0_mmc_pins[] = { 100, 101, 102 };
+static const unsigned can0_spi4_pins[] = { 86, 87 };
+static const unsigned can1_spi4_pins[] = { 88, 89 };
+static const unsigned sdio1_cd_pins[] = { 93 };
+static const unsigned sdio1_led_pins[] = { 84, 85 };
+static const unsigned sdio1_mmc_pins[] = { 90, 91, 92 };
+static const unsigned camera_led_pins[] = { 156, 157, 158, 159, 160 };
+static const unsigned camera_rgmii_pins[] = { 169, 170, 171, 169, 170, 171,
+	172, 173 };
+static const unsigned camera_sram_rgmii_pins[] = { 161, 162, 163, 164, 165,
+	166, 167, 168 };
+static const unsigned qspi_gpio_pins[] = { 108, 109 };
+static const unsigned smart_card0_fcb_pins[] = { 45 };
+static const unsigned smart_card1_fcb_pins[] = { 51 };
+static const unsigned gpio0_3p3_pins[] = { 176 };
+static const unsigned gpio1_3p3_pins[] = { 177 };
+static const unsigned gpio2_3p3_pins[] = { 178 };
+
+/*
+ * List of groups names. Need to match the order in cygnus_pin_groups
+ */
+static const char * const cygnus_pin_group_names[] = {
+	"gpio0",
+	"gpio1",
+	"gpio2",
+	"gpio3",
+	"gpio4",
+	"gpio5",
+	"gpio6",
+	"gpio7",
+	"gpio8",
+	"gpio9",
+	"gpio10",
+	"gpio11",
+	"gpio12",
+	"gpio13",
+	"gpio14",
+	"gpio15",
+	"gpio16",
+	"gpio17",
+	"gpio18",
+	"gpio19",
+	"gpio20",
+	"gpio21",
+	"gpio22",
+	"gpio23",
+	"pwm0",
+	"pwm1",
+	"pwm2",
+	"pwm3",
+	"sdio0",
+	"smart_card0",
+	"smart_card1",
+	"spi0",
+	"spi1",
+	"spi2",
+	"spi3",
+	"d1w",
+	"lcd",
+	"uart0",
+	"uart1_dte",
+	"uart1",
+	"uart3",
+	"qspi",
+	"nand",
+	"sdio0_cd",
+	"sdio0_mmc",
+	"can0_spi4",
+	"can1_spi4",
+	"sdio1_cd",
+	"sdio1_led",
+	"sdio1_mmc",
+	"camera_led",
+	"camera_rgmii",
+	"camera_sram_rgmii",
+	"qspi_gpio",
+	"smart_card0_fcb",
+	"smart_card1_fcb",
+	"gpio0_3p3",
+	"gpio1_3p3",
+	"gpio2_3p3",
+};
+
+/*
+ * List of groups. Need to match the order in cygnus_pin_group_names
+ */
+static const struct cygnus_pin_group cygnus_pin_groups[] = {
+	CYGNUS_PIN_GROUP(gpio0, 0x0, 0),
+	CYGNUS_PIN_GROUP(gpio1, 0x0, 4),
+	CYGNUS_PIN_GROUP(gpio2, 0x0, 8),
+	CYGNUS_PIN_GROUP(gpio3, 0x0, 12),
+	CYGNUS_PIN_GROUP(gpio4, 0x0, 16),
+	CYGNUS_PIN_GROUP(gpio5, 0x0, 20),
+	CYGNUS_PIN_GROUP(gpio6, 0x0, 24),
+	CYGNUS_PIN_GROUP(gpio7, 0x0, 28),
+	CYGNUS_PIN_GROUP(gpio8, 0x4, 0),
+	CYGNUS_PIN_GROUP(gpio9, 0x4, 4),
+	CYGNUS_PIN_GROUP(gpio10, 0x4, 8),
+	CYGNUS_PIN_GROUP(gpio11, 0x4, 12),
+	CYGNUS_PIN_GROUP(gpio12, 0x4, 16),
+	CYGNUS_PIN_GROUP(gpio13, 0x4, 20),
+	CYGNUS_PIN_GROUP(gpio14, 0x4, 24),
+	CYGNUS_PIN_GROUP(gpio15, 0x4, 28),
+	CYGNUS_PIN_GROUP(gpio16, 0x8, 0),
+	CYGNUS_PIN_GROUP(gpio17, 0x8, 4),
+	CYGNUS_PIN_GROUP(gpio18, 0x8, 8),
+	CYGNUS_PIN_GROUP(gpio19, 0x8, 12),
+	CYGNUS_PIN_GROUP(gpio20, 0x8, 16),
+	CYGNUS_PIN_GROUP(gpio21, 0x8, 20),
+	CYGNUS_PIN_GROUP(gpio22, 0x8, 24),
+	CYGNUS_PIN_GROUP(gpio23, 0x8, 28),
+	CYGNUS_PIN_GROUP(pwm0, 0xc, 0),
+	CYGNUS_PIN_GROUP(pwm1, 0xc, 4),
+	CYGNUS_PIN_GROUP(pwm2, 0xc, 8),
+	CYGNUS_PIN_GROUP(pwm3, 0xc, 12),
+	CYGNUS_PIN_GROUP(sdio0, 0xc, 16),
+	CYGNUS_PIN_GROUP(smart_card0, 0xc, 20),
+	CYGNUS_PIN_GROUP(smart_card1, 0xc, 24),
+	CYGNUS_PIN_GROUP(spi0, 0x10, 0),
+	CYGNUS_PIN_GROUP(spi1, 0x10, 4),
+	CYGNUS_PIN_GROUP(spi2, 0x10, 8),
+	CYGNUS_PIN_GROUP(spi3, 0x10, 12),
+	CYGNUS_PIN_GROUP(d1w, 0x10, 16),
+	CYGNUS_PIN_GROUP(lcd, 0x10, 20),
+	CYGNUS_PIN_GROUP(uart0, 0x14, 0),
+	CYGNUS_PIN_GROUP(uart1_dte, 0x14, 4),
+	CYGNUS_PIN_GROUP(uart1, 0x14, 8),
+	CYGNUS_PIN_GROUP(uart3, 0x14, 12),
+	CYGNUS_PIN_GROUP(qspi, 0x14, 16),
+	CYGNUS_PIN_GROUP(nand, 0x14, 20),
+	CYGNUS_PIN_GROUP(sdio0_cd, 0x18, 0),
+	CYGNUS_PIN_GROUP(sdio0_mmc, 0x18, 4),
+	CYGNUS_PIN_GROUP(can0_spi4, 0x18, 8),
+	CYGNUS_PIN_GROUP(can1_spi4, 0x18, 12),
+	CYGNUS_PIN_GROUP(sdio1_cd, 0x18, 16),
+	CYGNUS_PIN_GROUP(sdio1_led, 0x18, 20),
+	CYGNUS_PIN_GROUP(sdio1_mmc, 0x18, 24),
+	CYGNUS_PIN_GROUP(camera_led, 0x1c, 0),
+	CYGNUS_PIN_GROUP(camera_rgmii, 0x1c, 4),
+	CYGNUS_PIN_GROUP(camera_sram_rgmii, 0x1c, 8),
+	CYGNUS_PIN_GROUP(qspi_gpio, 0x1c, 12),
+	CYGNUS_PIN_GROUP(smart_card0_fcb, 0x20, 0),
+	CYGNUS_PIN_GROUP(smart_card1_fcb, 0x20, 4),
+	CYGNUS_PIN_GROUP(gpio0_3p3, 0x28, 0),
+	CYGNUS_PIN_GROUP(gpio1_3p3, 0x28, 4),
+	CYGNUS_PIN_GROUP(gpio2_3p3, 0x28, 8),
+};
+
+#define CYGNUS_PIN_FUNCTION(fcn_name, mux_val)			\
+{								\
+	.name = #fcn_name,					\
+	.group_names = cygnus_pin_group_names,			\
+	.num_groups = ARRAY_SIZE(cygnus_pin_group_names),	\
+	.mux = mux_val,						\
+}
+
+/*
+ * Cygnus has 4 alternate functions. All groups can be configured to any of
+ * the 4 alternate functions
+ */
+static const struct cygnus_pin_function cygnus_pin_functions[] = {
+	CYGNUS_PIN_FUNCTION(alt1, 0),
+	CYGNUS_PIN_FUNCTION(alt2, 1),
+	CYGNUS_PIN_FUNCTION(alt3, 2),
+	CYGNUS_PIN_FUNCTION(alt4, 3),
+};
+
+static int cygnus_get_groups_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_groups;
+}
+
+static const char *cygnus_get_group_name(struct pinctrl_dev *pctrl_dev,
+		unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->groups[selector].name;
+}
+
+static int cygnus_get_group_pins(struct pinctrl_dev *pctrl_dev,
+		unsigned selector, const unsigned **pins,
+		unsigned *num_pins)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*pins = pinctrl->groups[selector].pins;
+	*num_pins = pinctrl->groups[selector].num_pins;
+
+	return 0;
+}
+
+static void cygnus_pin_dbg_show(struct pinctrl_dev *pctrl_dev,
+		struct seq_file *s, unsigned offset)
+{
+	seq_printf(s, " %s", dev_name(pctrl_dev->dev));
+}
+
+static int find_matched_function(const char *function_name)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cygnus_pin_functions); i++) {
+		if (!strcmp(cygnus_pin_functions[i].name, function_name))
+			return (int)cygnus_pin_functions[i].mux;
+	}
+
+	return -EINVAL;
+}
+
+static int cygnus_dt_node_to_map(struct pinctrl_dev *pctrl_dev,
+		struct device_node *np, struct pinctrl_map **map,
+		unsigned *num_maps)
+{
+	int ret, num_groups;
+	unsigned reserved_maps = 0;
+	struct property *prop;
+	const char *group_name, *function_name;
+
+	*map = NULL;
+	*num_maps = 0;
+
+	num_groups = of_property_count_strings(np, "brcm,groups");
+	if (num_groups < 0) {
+		dev_err(pctrl_dev->dev,
+			"could not parse property brcm,groups\n");
+		return -EINVAL;
+	}
+
+	ret = of_property_read_string(np, "brcm,function", &function_name);
+	if (ret < 0) {
+		dev_err(pctrl_dev->dev,
+			"could not parse property brcm,function\n");
+		return -EINVAL;
+	}
+
+	/* make sure it's a valid alternate function */
+	ret = find_matched_function(function_name);
+	if (ret < 0) {
+		dev_err(pctrl_dev->dev, "invalid function name: %s\n",
+				function_name);
+	}
+
+	ret = pinctrl_utils_reserve_map(pctrl_dev, map, &reserved_maps,
+			num_maps, num_groups);
+	if (ret) {
+		dev_err(pctrl_dev->dev, "unable to reserve map\n");
+		return ret;
+	}
+
+	of_property_for_each_string(np, "brcm,groups", prop, group_name) {
+		ret = pinctrl_utils_add_map_mux(pctrl_dev, map,
+				&reserved_maps, num_maps, group_name,
+				function_name);
+		if (ret) {
+			dev_err(pctrl_dev->dev, "can't add map: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static struct pinctrl_ops cygnus_pinctrl_ops = {
+	.get_groups_count = cygnus_get_groups_count,
+	.get_group_name = cygnus_get_group_name,
+	.get_group_pins = cygnus_get_group_pins,
+	.pin_dbg_show = cygnus_pin_dbg_show,
+	.dt_node_to_map = cygnus_dt_node_to_map,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_functions;
+}
+
+static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
+		unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->functions[selector].name;
+}
+
+static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
+	unsigned selector, const char * const **groups,
+	unsigned * const num_groups)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*groups = pinctrl->functions[selector].group_names;
+	*num_groups = pinctrl->functions[selector].num_groups;
+
+	return 0;
+}
+
+static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
+		unsigned function_selector, unsigned group_selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	const struct cygnus_pin_function *function =
+			&pinctrl->functions[function_selector];
+	const struct cygnus_pin_group *group =
+			&pinctrl->groups[group_selector];
+	u32 val, mask = 0x7;
+
+	dev_dbg(pctrl_dev->dev,
+	"group:%s with offset:0x%08x shift:%u set to function: %s mux:%u\n",
+		group->name, group->offset, group->shift, function->name,
+		function->mux);
+
+	val = readl(pinctrl->base + group->offset);
+	val &= ~(mask << group->shift);
+	val |= function->mux << group->shift;
+	writel(val, pinctrl->base + group->offset);
+
+	return 0;
+}
+
+static struct pinmux_ops cygnus_pinmux_ops = {
+	.get_functions_count = cygnus_get_functions_count,
+	.get_function_name = cygnus_get_function_name,
+	.get_function_groups = cygnus_get_function_groups,
+	.set_mux = cygnus_pinmux_set_mux,
+};
+
+static struct pinctrl_desc cygnus_pinctrl_desc = {
+	.pctlops = &cygnus_pinctrl_ops,
+	.pmxops = &cygnus_pinmux_ops,
+	.owner = THIS_MODULE,
+};
+
+static int cygnus_pinctrl_probe(struct platform_device *pdev)
+{
+	struct cygnus_pinctrl *pinctrl;
+	struct resource *res;
+
+	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
+	if (!pinctrl) {
+		dev_err(&pdev->dev, "unable to allocate memory\n");
+		return -ENOMEM;
+	}
+	pinctrl->dev = &pdev->dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "unable to get resource\n");
+		return -ENOENT;
+	}
+
+	pinctrl->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pinctrl->base)) {
+		dev_err(&pdev->dev, "unable to map I/O space\n");
+		return PTR_ERR(pinctrl->base);
+	}
+
+	pinctrl->pins = cygnus_pinctrl_pins;
+	pinctrl->num_pins = ARRAY_SIZE(cygnus_pinctrl_pins);
+	pinctrl->groups = cygnus_pin_groups;
+	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
+	pinctrl->functions = cygnus_pin_functions;
+	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
+
+	cygnus_pinctrl_desc.name = dev_name(&pdev->dev);
+	cygnus_pinctrl_desc.pins = cygnus_pinctrl_pins;
+	cygnus_pinctrl_desc.npins = ARRAY_SIZE(cygnus_pinctrl_pins);
+
+	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
+			pinctrl);
+	if (!pinctrl->pctl) {
+		dev_err(&pdev->dev, "unable to register cygnus pinctrl\n");
+		return -EINVAL;
+	}
+
+	platform_set_drvdata(pdev, pinctrl);
+
+	return 0;
+}
+
+static int cygnus_pinctrl_remove(struct platform_device *pdev)
+{
+	struct cygnus_pinctrl *pinctrl = platform_get_drvdata(pdev);
+
+	pinctrl_unregister(pinctrl->pctl);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static struct of_device_id cygnus_pinctrl_of_match[] = {
+	{ .compatible = "brcm,cygnus-pinctrl", },
+	{ },
+};
+
+static struct platform_driver cygnus_pinctrl_driver = {
+	.driver = {
+		.name = "cygnus-pinctrl",
+		.owner = THIS_MODULE,
+		.of_match_table = cygnus_pinctrl_of_match,
+	},
+	.probe = cygnus_pinctrl_probe,
+	.remove = cygnus_pinctrl_remove,
+};
+
+static int __init cygnus_pinctrl_init(void)
+{
+	return platform_driver_register(&cygnus_pinctrl_driver);
+}
+arch_initcall(cygnus_pinctrl_init);
+
+static void __exit cygnus_pinctrl_exit(void)
+{
+	platform_driver_unregister(&cygnus_pinctrl_driver);
+}
+module_exit(cygnus_pinctrl_exit);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus pinctrl driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

[PATCH 3/4] ARM: mach-bcm: enable pinctrl support for Cygnus

[Ray Jui]

This enables the pinctrl driver for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 arch/arm/mach-bcm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index aaeec78..b4efff2 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -29,6 +29,7 @@ config ARCH_BCM_IPROC
 config ARCH_BCM_CYGNUS
 	bool "Broadcom Cygnus Support" if ARCH_MULTI_V7
 	select ARCH_BCM_IPROC
+	select PINCTRL_BCM_CYGNUS
 	help
 	  Enable support for the Cygnus family,
 	  which includes the following variants:
-- 
1.7.9.5

[PATCH 4/4] ARM: dts: enable pinctrl for Broadcom Cygnus

[Ray Jui]

This enables the pinctrl support for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..4c6bf4d 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,11 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	pinctrl: pinctrl@0x0301d0c8 {
+		compatible = "brcm,cygnus-pinctrl";
+		reg = <0x0301d0c8 0x2c>;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v2 0/4] Add pinctrl support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial pinctrl support for the Broadcom Cygnus SoC.
The Cygnus pinctrl controller supports group based alternate function configuration

Changes from v1:
 - Fix a typo in device tree binding document

Ray Jui (4):
  pinctrl: Broadcom Cygnus pinctrl device tree binding
  pinctrl: cygnus: add initial pinctrl support
  ARM: mach-bcm: enable pinctrl support for Cygnus
  ARM: dts: enable pinctrl for Broadcom Cygnus

 .../bindings/pinctrl/brcm,cygnus-pinctrl.txt       |   92 +++
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |    5 +
 arch/arm/mach-bcm/Kconfig                          |    1 +
 drivers/pinctrl/Kconfig                            |    7 +
 drivers/pinctrl/Makefile                           |    1 +
 drivers/pinctrl/pinctrl-bcm-cygnus.c               |  753 ++++++++++++++++++++
 6 files changed, 859 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
 create mode 100644 drivers/pinctrl/pinctrl-bcm-cygnus.c

-- 
1.7.9.5

[PATCH v2 1/4] pinctrl: Broadcom Cygnus pinctrl device tree binding

[Ray Jui]

Device tree binding documentation for Broadcom Cygnus pinctrl driver

Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Scott Branden <sbranden-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
---
 .../bindings/pinctrl/brcm,cygnus-pinctrl.txt       |   92 ++++++++++++++++++++
 1 file changed, 92 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
new file mode 100644
index 0000000..4461aaf
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinctrl.txt
@@ -0,0 +1,92 @@
+Broadcom Cygnus Pin Controller
+
+The Cygnus pin controller supports setting the alternate functions of groups
+of pins. Pinmux configuration on individual pins is not supported by the
+Cygnus A0 SoC.
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-pinctrl"
+
+- reg:
+    Define the base and range of the I/O address space that contain the Cygnus
+pin control registers
+
+- brcm,groups:
+    This can be strings of one or more group names. This defines the group(s)
+that one wants to configure
+
+- brcm,function:
+    This is the alternate function that one wants to configure to. Valid
+alternate functions are "alt1", "alt2", "alt3", "alt4"
+
+Each child node represents a configuration. Client devices reference the the
+child node to enable the mux configuration.
+
+For example:
+
+	pinctrl: pinctrl@0x0301d0c8 {
+		compatible = "brcm,cygnus-pinctrl";
+		reg = <0x0301d0c8 0x2c>;
+
+		i2s_0: i2s_0 {
+			brcm,groups = "smart_card0", "smart_card0_fcb";
+			brcm,function = "alt2";
+		};
+
+		i2s_1: i2s_1 {
+			brcm,groups = "smart_card1", "smart_card1_fcb";
+			brcm,function = "alt2";
+		};
+
+		spi_0: spi_0 {
+			brcm,groups = "spi0";
+			brcm,function = "alt1";
+		};
+	}
+
+	spi0@18028000 {
+			compatible = "arm,pl022", "arm,primecell";
+			reg = <0x18028000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+			pinctrl-0 = <&spi_0>;
+			clocks = <&axi81_clk>;
+			clock-names = "apb_pclk";
+	};
+
+Consider the following snapshot of Cygnus pinmux table:
+
+number    pin            group              alt1             alt2        alt3        alt4
+------    ---            ----               ----             ----        ----        ----
+42        sc0_clk        smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio24
+43        sc0_cmdvcc_l   smart_card0        SMART CARD0      I2S_0       N/A         STRAP
+44        sc0_detect     smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio25
+45        sc0_fcb        smart_card0_fcb    SMART CARD0_FCB  I2S_0       N/A         chip_gpio26
+46        sc0_io         smart_card0        SMART CARD0      I2S_0       N/A         chip_gpio27
+47        sc0_rst_l      smart_card0        SMART CARD0      SPDIF       N/A         STRAP
+
+Note due to limitation of the Cygnus hardware, pinmux configuration can only
+be group based. To enable I2S_0 function, one needs the following child node
+configuration:
+
+	i2s_0: i2s_0 {
+		brcm,groups = "smart_card0", "smart_card0_fcb";
+		brcm,function = "alt2";
+	};
+
+This tells the Cygnus pin controller to configure groups "smart_card0" and
+"smart_card0_fcb" to I2S_0. With this configuration, pins 42, 43, 44, 45, 46
+become I2S_0, and pin 47 becomes SPDIF
+
+Consider another example, that one wants to configure the above pins as GPIO:
+
+	gpio_24_27: gpio_24_27 {
+		brcm,groups = "smart_card0", "smart_card0_fcb";
+		brcm,function = "alt4";
+	};
+
+With the above configuration, pins 42, 44, 45, 46 become GPIO, and 43 and 47
+become reserved for STRAP
-- 
1.7.9.5

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[PATCH v2 2/4] pinctrl: cygnus: add initial pinctrl support

[Ray Jui]

This adds the initial driver support for the Broadcom Cygnus pinctrl
controller. The Cygnus pinctrl controller supports group based
alternate function configuration

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---
 drivers/pinctrl/Kconfig              |    7 +
 drivers/pinctrl/Makefile             |    1 +
 drivers/pinctrl/pinctrl-bcm-cygnus.c |  753 ++++++++++++++++++++++++++++++++++
 3 files changed, 761 insertions(+)
 create mode 100644 drivers/pinctrl/pinctrl-bcm-cygnus.c

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index d014f22..4549e9f 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -85,6 +85,13 @@ config PINCTRL_BCM281XX
 	  BCM28145, and BCM28155 SoCs.  This driver requires the pinctrl
 	  framework.  GPIO is provided by a separate GPIO driver.
 
+config PINCTRL_BCM_CYGNUS
+	bool "Broadcom Cygnus pinctrl driver"
+	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+
 config PINCTRL_LANTIQ
 	bool
 	depends on LANTIQ
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index c030b3d..4ed8e8a 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_PINCTRL_BF60x)	+= pinctrl-adi2-bf60x.o
 obj-$(CONFIG_PINCTRL_AT91)	+= pinctrl-at91.o
 obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
 obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
+obj-$(CONFIG_PINCTRL_BCM_CYGNUS)	+= pinctrl-bcm-cygnus.o
 obj-$(CONFIG_PINCTRL_FALCON)	+= pinctrl-falcon.o
 obj-$(CONFIG_PINCTRL_PALMAS)	+= pinctrl-palmas.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP)	+= pinctrl-rockchip.o
diff --git a/drivers/pinctrl/pinctrl-bcm-cygnus.c b/drivers/pinctrl/pinctrl-bcm-cygnus.c
new file mode 100644
index 0000000..eb6e27a
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-bcm-cygnus.c
@@ -0,0 +1,753 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/slab.h>
+
+#include "core.h"
+#include "pinctrl-utils.h"
+
+/*
+ * Alternate function configuration
+ *
+ * @name: name of the alternate function
+ * @group_names: array of strings of group names that can be supported by this
+ * alternate function
+ * @num_groups: total number of groups that can be supported by this alternate
+ * function
+ * @mux: mux setting for this alternate function to be programed
+ */
+struct cygnus_pin_function {
+	const char *name;
+	const char * const *group_names;
+	const unsigned num_groups;
+	unsigned int mux;
+};
+
+/*
+ * Cygnus allows group based pinmux configuration
+ *
+ * @name: name of the group
+ * @pins: array of pins used by this group
+ * @num_pins: total number of pins used by this group
+ * @offset: register offset for pinmux configuration of this group
+ * @shift: bit shift for pinmux configuration of this group
+ */
+struct cygnus_pin_group {
+	const char *name;
+	const unsigned *pins;
+	const unsigned num_pins;
+	const unsigned int offset;
+	const unsigned int shift;
+};
+
+/*
+ * Cygnus pinctrl core
+ *
+ * @pctl: pointer to pinctrl_dev
+ * @dev: pointer to the device
+ * @base: I/O register base for Cygnus pinctrl configuration
+ *
+ */
+struct cygnus_pinctrl {
+	struct pinctrl_dev *pctl;
+	struct device *dev;
+	void __iomem *base;
+
+	const struct pinctrl_pin_desc *pins;
+	unsigned num_pins;
+
+	const struct cygnus_pin_group *groups;
+	unsigned num_groups;
+
+	const struct cygnus_pin_function *functions;
+	unsigned num_functions;
+};
+
+#define CYGNUS_PIN_GROUP(group_name, off, sh)		\
+{							\
+	.name = #group_name,				\
+	.pins = group_name##_pins,			\
+	.num_pins = ARRAY_SIZE(group_name##_pins),	\
+	.offset = off,					\
+	.shift = sh,					\
+}
+
+/*
+ * The following pin description is based on Cygnus I/O MUX spreadsheet
+ */
+static const struct pinctrl_pin_desc cygnus_pinctrl_pins[] = {
+	PINCTRL_PIN(0, "ext_device_reset_n"),
+	PINCTRL_PIN(1, "chip_mode0"),
+	PINCTRL_PIN(2, "chip_mode1"),
+	PINCTRL_PIN(3, "chip_mode2"),
+	PINCTRL_PIN(4, "chip_mode3"),
+	PINCTRL_PIN(5, "chip_mode4"),
+	PINCTRL_PIN(6, "bsc0_scl"),
+	PINCTRL_PIN(7, "bsc0_sda"),
+	PINCTRL_PIN(8, "bsc1_scl"),
+	PINCTRL_PIN(9, "bsc1_sda"),
+	PINCTRL_PIN(10, "d1w_dq"),
+	PINCTRL_PIN(11, "d1wowstz_l"),
+	PINCTRL_PIN(12, "gpio0"),
+	PINCTRL_PIN(13, "gpio1"),
+	PINCTRL_PIN(14, "gpio2"),
+	PINCTRL_PIN(15, "gpio3"),
+	PINCTRL_PIN(16, "gpio4"),
+	PINCTRL_PIN(17, "gpio5"),
+	PINCTRL_PIN(18, "gpio6"),
+	PINCTRL_PIN(19, "gpio7"),
+	PINCTRL_PIN(20, "gpio8"),
+	PINCTRL_PIN(21, "gpio9"),
+	PINCTRL_PIN(22, "gpio10"),
+	PINCTRL_PIN(23, "gpio11"),
+	PINCTRL_PIN(24, "gpio12"),
+	PINCTRL_PIN(25, "gpio13"),
+	PINCTRL_PIN(26, "gpio14"),
+	PINCTRL_PIN(27, "gpio15"),
+	PINCTRL_PIN(28, "gpio16"),
+	PINCTRL_PIN(29, "gpio17"),
+	PINCTRL_PIN(30, "gpio18"),
+	PINCTRL_PIN(31, "gpio19"),
+	PINCTRL_PIN(32, "gpio20"),
+	PINCTRL_PIN(33, "gpio21"),
+	PINCTRL_PIN(34, "gpio22"),
+	PINCTRL_PIN(35, "gpio23"),
+	PINCTRL_PIN(36, "mdc"),
+	PINCTRL_PIN(37, "mdio"),
+	PINCTRL_PIN(38, "pwm0"),
+	PINCTRL_PIN(39, "pwm1"),
+	PINCTRL_PIN(40, "pwm2"),
+	PINCTRL_PIN(41, "pwm3"),
+	PINCTRL_PIN(42, "sc0_clk"),
+	PINCTRL_PIN(43, "sc0_cmdvcc_l"),
+	PINCTRL_PIN(44, "sc0_detect"),
+	PINCTRL_PIN(45, "sc0_fcb"),
+	PINCTRL_PIN(46, "sc0_io"),
+	PINCTRL_PIN(47, "sc0_rst_l"),
+	PINCTRL_PIN(48, "sc1_clk"),
+	PINCTRL_PIN(49, "sc1_cmdvcc_l"),
+	PINCTRL_PIN(50, "sc1_detect"),
+	PINCTRL_PIN(51, "sc1_fcb"),
+	PINCTRL_PIN(52, "sc1_io"),
+	PINCTRL_PIN(53, "sc1_rst_l"),
+	PINCTRL_PIN(54, "spi0_clk"),
+	PINCTRL_PIN(55, "spi0_mosi"),
+	PINCTRL_PIN(56, "spi0_miso"),
+	PINCTRL_PIN(57, "spi0_ss"),
+	PINCTRL_PIN(58, "spi1_clk"),
+	PINCTRL_PIN(59, "spi1_mosi"),
+	PINCTRL_PIN(60, "spi1_miso"),
+	PINCTRL_PIN(61, "spi1_ss"),
+	PINCTRL_PIN(62, "spi2_clk"),
+	PINCTRL_PIN(63, "spi2_mosi"),
+	PINCTRL_PIN(64, "spi2_miso"),
+	PINCTRL_PIN(65, "spi2_ss"),
+	PINCTRL_PIN(66, "spi3_clk"),
+	PINCTRL_PIN(67, "spi3_mosi"),
+	PINCTRL_PIN(68, "spi3_miso"),
+	PINCTRL_PIN(69, "spi3_ss"),
+	PINCTRL_PIN(70, "uart0_cts"),
+	PINCTRL_PIN(71, "uart0_rts"),
+	PINCTRL_PIN(72, "uart0_rx"),
+	PINCTRL_PIN(73, "uart0_tx"),
+	PINCTRL_PIN(74, "uart1_cts"),
+	PINCTRL_PIN(75, "uart1_dcd"),
+	PINCTRL_PIN(76, "uart1_dsr"),
+	PINCTRL_PIN(77, "uart1_dtr"),
+	PINCTRL_PIN(78, "uart1_ri"),
+	PINCTRL_PIN(79, "uart1_rts"),
+	PINCTRL_PIN(80, "uart1_rx"),
+	PINCTRL_PIN(81, "uart1_tx"),
+	PINCTRL_PIN(82, "uart3_rx"),
+	PINCTRL_PIN(83, "uart3_tx"),
+	PINCTRL_PIN(84, "sdio1_clk_sdcard"),
+	PINCTRL_PIN(85, "sdio1_cmd"),
+	PINCTRL_PIN(86, "sdio1_data0"),
+	PINCTRL_PIN(87, "sdio1_data1"),
+	PINCTRL_PIN(88, "sdio1_data2"),
+	PINCTRL_PIN(89, "sdio1_data3"),
+	PINCTRL_PIN(90, "sdio1_wp_n"),
+	PINCTRL_PIN(91, "sdio1_card_rst"),
+	PINCTRL_PIN(92, "sdio1_led_on"),
+	PINCTRL_PIN(93, "sdio1_cd"),
+	PINCTRL_PIN(94, "sdio0_clk_sdcard"),
+	PINCTRL_PIN(95, "sdio0_cmd"),
+	PINCTRL_PIN(96, "sdio0_data0"),
+	PINCTRL_PIN(97, "sdio0_data1"),
+	PINCTRL_PIN(98, "sdio0_data2"),
+	PINCTRL_PIN(99, "sdio0_data3"),
+	PINCTRL_PIN(100, "sdio0_wp_n"),
+	PINCTRL_PIN(101, "sdio0_card_rst"),
+	PINCTRL_PIN(102, "sdio0_led_on"),
+	PINCTRL_PIN(103, "sdio0_cd"),
+	PINCTRL_PIN(104, "sflash_clk"),
+	PINCTRL_PIN(105, "sflash_cs_l"),
+	PINCTRL_PIN(106, "sflash_mosi"),
+	PINCTRL_PIN(107, "sflash_miso"),
+	PINCTRL_PIN(108, "sflash_wp_n"),
+	PINCTRL_PIN(109, "sflash_hold_n"),
+	PINCTRL_PIN(110, "nand_ale"),
+	PINCTRL_PIN(111, "nand_ce0_l"),
+	PINCTRL_PIN(112, "nand_ce1_l"),
+	PINCTRL_PIN(113, "nand_cle"),
+	PINCTRL_PIN(114, "nand_dq0"),
+	PINCTRL_PIN(115, "nand_dq1"),
+	PINCTRL_PIN(116, "nand_dq2"),
+	PINCTRL_PIN(117, "nand_dq3"),
+	PINCTRL_PIN(118, "nand_dq4"),
+	PINCTRL_PIN(119, "nand_dq5"),
+	PINCTRL_PIN(120, "nand_dq6"),
+	PINCTRL_PIN(121, "nand_dq7"),
+	PINCTRL_PIN(122, "nand_rb_l"),
+	PINCTRL_PIN(123, "nand_re_l"),
+	PINCTRL_PIN(124, "nand_we_l"),
+	PINCTRL_PIN(125, "nand_wp_l"),
+	PINCTRL_PIN(126, "lcd_clac"),
+	PINCTRL_PIN(127, "lcd_clcp"),
+	PINCTRL_PIN(128, "lcd_cld0"),
+	PINCTRL_PIN(129, "lcd_cld1"),
+	PINCTRL_PIN(130, "lcd_cld10"),
+	PINCTRL_PIN(131, "lcd_cld11"),
+	PINCTRL_PIN(132, "lcd_cld12"),
+	PINCTRL_PIN(133, "lcd_cld13"),
+	PINCTRL_PIN(134, "lcd_cld14"),
+	PINCTRL_PIN(135, "lcd_cld15"),
+	PINCTRL_PIN(136, "lcd_cld16"),
+	PINCTRL_PIN(137, "lcd_cld17"),
+	PINCTRL_PIN(138, "lcd_cld18"),
+	PINCTRL_PIN(139, "lcd_cld19"),
+	PINCTRL_PIN(140, "lcd_cld2"),
+	PINCTRL_PIN(141, "lcd_cld20"),
+	PINCTRL_PIN(142, "lcd_cld21"),
+	PINCTRL_PIN(143, "lcd_cld22"),
+	PINCTRL_PIN(144, "lcd_cld23"),
+	PINCTRL_PIN(145, "lcd_cld3"),
+	PINCTRL_PIN(146, "lcd_cld4"),
+	PINCTRL_PIN(147, "lcd_cld5"),
+	PINCTRL_PIN(148, "lcd_cld6"),
+	PINCTRL_PIN(149, "lcd_cld7"),
+	PINCTRL_PIN(150, "lcd_cld8"),
+	PINCTRL_PIN(151, "lcd_cld9"),
+	PINCTRL_PIN(152, "lcd_clfp"),
+	PINCTRL_PIN(153, "lcd_clle"),
+	PINCTRL_PIN(154, "lcd_cllp"),
+	PINCTRL_PIN(155, "lcd_clpower"),
+	PINCTRL_PIN(156, "camera_vsync"),
+	PINCTRL_PIN(157, "camera_trigger"),
+	PINCTRL_PIN(158, "camera_strobe"),
+	PINCTRL_PIN(159, "camera_standby"),
+	PINCTRL_PIN(160, "camera_reset_n"),
+	PINCTRL_PIN(161, "camera_pixdata9"),
+	PINCTRL_PIN(162, "camera_pixdata8"),
+	PINCTRL_PIN(163, "camera_pixdata7"),
+	PINCTRL_PIN(164, "camera_pixdata6"),
+	PINCTRL_PIN(165, "camera_pixdata5"),
+	PINCTRL_PIN(166, "camera_pixdata4"),
+	PINCTRL_PIN(167, "camera_pixdata3"),
+	PINCTRL_PIN(168, "camera_pixdata2"),
+	PINCTRL_PIN(169, "camera_pixdata1"),
+	PINCTRL_PIN(170, "camera_pixdata0"),
+	PINCTRL_PIN(171, "camera_pixclk"),
+	PINCTRL_PIN(172, "camera_hsync"),
+	PINCTRL_PIN(173, "camera_pll_ref_clk"),
+	PINCTRL_PIN(174, "usb_id_indication"),
+	PINCTRL_PIN(175, "usb_vbus_indication"),
+	PINCTRL_PIN(176, "gpio0_3p3"),
+	PINCTRL_PIN(177, "gpio1_3p3"),
+	PINCTRL_PIN(178, "gpio2_3p3"),
+	PINCTRL_PIN(179, "gpio3_3p3"),
+};
+
+/*
+ * List of groups of pins
+ */
+static const unsigned gpio0_pins[] = { 12 };
+static const unsigned gpio1_pins[] = { 13 };
+static const unsigned gpio2_pins[] = { 14 };
+static const unsigned gpio3_pins[] = { 15 };
+static const unsigned gpio4_pins[] = { 16 };
+static const unsigned gpio5_pins[] = { 17 };
+static const unsigned gpio6_pins[] = { 18 };
+static const unsigned gpio7_pins[] = { 19 };
+static const unsigned gpio8_pins[] = { 20 };
+static const unsigned gpio9_pins[] = { 21 };
+static const unsigned gpio10_pins[] = { 22 };
+static const unsigned gpio11_pins[] = { 23 };
+static const unsigned gpio12_pins[] = { 24 };
+static const unsigned gpio13_pins[] = { 25 };
+static const unsigned gpio14_pins[] = { 26 };
+static const unsigned gpio15_pins[] = { 27 };
+static const unsigned gpio16_pins[] = { 28 };
+static const unsigned gpio17_pins[] = { 29 };
+static const unsigned gpio18_pins[] = { 30 };
+static const unsigned gpio19_pins[] = { 31 };
+static const unsigned gpio20_pins[] = { 32 };
+static const unsigned gpio21_pins[] = { 33 };
+static const unsigned gpio22_pins[] = { 34 };
+static const unsigned gpio23_pins[] = { 35 };
+static const unsigned pwm0_pins[] = { 38 };
+static const unsigned pwm1_pins[] = { 39 };
+static const unsigned pwm2_pins[] = { 40 };
+static const unsigned pwm3_pins[] = { 41 };
+static const unsigned sdio0_pins[] = { 94, 95, 96, 97, 98, 99 };
+static const unsigned smart_card0_pins[] = { 42, 43, 44, 46, 47 };
+static const unsigned smart_card1_pins[] = { 48, 49, 50, 52, 53 };
+static const unsigned spi0_pins[] = { 54, 55, 56, 57 };
+static const unsigned spi1_pins[] = { 58, 59, 60, 61 };
+static const unsigned spi2_pins[] = { 62, 63, 64, 65 };
+static const unsigned spi3_pins[] = { 66, 67, 68, 69 };
+static const unsigned d1w_pins[] = { 10, 11 };
+static const unsigned lcd_pins[] = { 126, 127, 128, 129, 130, 131, 132,	133,
+	134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
+	148, 149, 150, 151, 152, 153, 154, 155 };
+static const unsigned uart0_pins[] = { 70, 71, 72, 73 };
+static const unsigned uart1_dte_pins[] = { 75, 76, 77, 78 };
+static const unsigned uart1_pins[] = { 74, 79, 80, 81 };
+static const unsigned uart3_pins[] = { 82, 83 };
+static const unsigned qspi_pins[] = { 104, 105, 106, 107 };
+static const unsigned nand_pins[] = { 110, 111, 112, 113, 114, 115, 116, 117,
+	118, 119, 120, 121, 122, 123, 124, 125 };
+static const unsigned sdio0_cd_pins[] = { 103 };
+static const unsigned sdio0_mmc_pins[] = { 100, 101, 102 };
+static const unsigned can0_spi4_pins[] = { 86, 87 };
+static const unsigned can1_spi4_pins[] = { 88, 89 };
+static const unsigned sdio1_cd_pins[] = { 93 };
+static const unsigned sdio1_led_pins[] = { 84, 85 };
+static const unsigned sdio1_mmc_pins[] = { 90, 91, 92 };
+static const unsigned camera_led_pins[] = { 156, 157, 158, 159, 160 };
+static const unsigned camera_rgmii_pins[] = { 169, 170, 171, 169, 170, 171,
+	172, 173 };
+static const unsigned camera_sram_rgmii_pins[] = { 161, 162, 163, 164, 165,
+	166, 167, 168 };
+static const unsigned qspi_gpio_pins[] = { 108, 109 };
+static const unsigned smart_card0_fcb_pins[] = { 45 };
+static const unsigned smart_card1_fcb_pins[] = { 51 };
+static const unsigned gpio0_3p3_pins[] = { 176 };
+static const unsigned gpio1_3p3_pins[] = { 177 };
+static const unsigned gpio2_3p3_pins[] = { 178 };
+
+/*
+ * List of groups names. Need to match the order in cygnus_pin_groups
+ */
+static const char * const cygnus_pin_group_names[] = {
+	"gpio0",
+	"gpio1",
+	"gpio2",
+	"gpio3",
+	"gpio4",
+	"gpio5",
+	"gpio6",
+	"gpio7",
+	"gpio8",
+	"gpio9",
+	"gpio10",
+	"gpio11",
+	"gpio12",
+	"gpio13",
+	"gpio14",
+	"gpio15",
+	"gpio16",
+	"gpio17",
+	"gpio18",
+	"gpio19",
+	"gpio20",
+	"gpio21",
+	"gpio22",
+	"gpio23",
+	"pwm0",
+	"pwm1",
+	"pwm2",
+	"pwm3",
+	"sdio0",
+	"smart_card0",
+	"smart_card1",
+	"spi0",
+	"spi1",
+	"spi2",
+	"spi3",
+	"d1w",
+	"lcd",
+	"uart0",
+	"uart1_dte",
+	"uart1",
+	"uart3",
+	"qspi",
+	"nand",
+	"sdio0_cd",
+	"sdio0_mmc",
+	"can0_spi4",
+	"can1_spi4",
+	"sdio1_cd",
+	"sdio1_led",
+	"sdio1_mmc",
+	"camera_led",
+	"camera_rgmii",
+	"camera_sram_rgmii",
+	"qspi_gpio",
+	"smart_card0_fcb",
+	"smart_card1_fcb",
+	"gpio0_3p3",
+	"gpio1_3p3",
+	"gpio2_3p3",
+};
+
+/*
+ * List of groups. Need to match the order in cygnus_pin_group_names
+ */
+static const struct cygnus_pin_group cygnus_pin_groups[] = {
+	CYGNUS_PIN_GROUP(gpio0, 0x0, 0),
+	CYGNUS_PIN_GROUP(gpio1, 0x0, 4),
+	CYGNUS_PIN_GROUP(gpio2, 0x0, 8),
+	CYGNUS_PIN_GROUP(gpio3, 0x0, 12),
+	CYGNUS_PIN_GROUP(gpio4, 0x0, 16),
+	CYGNUS_PIN_GROUP(gpio5, 0x0, 20),
+	CYGNUS_PIN_GROUP(gpio6, 0x0, 24),
+	CYGNUS_PIN_GROUP(gpio7, 0x0, 28),
+	CYGNUS_PIN_GROUP(gpio8, 0x4, 0),
+	CYGNUS_PIN_GROUP(gpio9, 0x4, 4),
+	CYGNUS_PIN_GROUP(gpio10, 0x4, 8),
+	CYGNUS_PIN_GROUP(gpio11, 0x4, 12),
+	CYGNUS_PIN_GROUP(gpio12, 0x4, 16),
+	CYGNUS_PIN_GROUP(gpio13, 0x4, 20),
+	CYGNUS_PIN_GROUP(gpio14, 0x4, 24),
+	CYGNUS_PIN_GROUP(gpio15, 0x4, 28),
+	CYGNUS_PIN_GROUP(gpio16, 0x8, 0),
+	CYGNUS_PIN_GROUP(gpio17, 0x8, 4),
+	CYGNUS_PIN_GROUP(gpio18, 0x8, 8),
+	CYGNUS_PIN_GROUP(gpio19, 0x8, 12),
+	CYGNUS_PIN_GROUP(gpio20, 0x8, 16),
+	CYGNUS_PIN_GROUP(gpio21, 0x8, 20),
+	CYGNUS_PIN_GROUP(gpio22, 0x8, 24),
+	CYGNUS_PIN_GROUP(gpio23, 0x8, 28),
+	CYGNUS_PIN_GROUP(pwm0, 0xc, 0),
+	CYGNUS_PIN_GROUP(pwm1, 0xc, 4),
+	CYGNUS_PIN_GROUP(pwm2, 0xc, 8),
+	CYGNUS_PIN_GROUP(pwm3, 0xc, 12),
+	CYGNUS_PIN_GROUP(sdio0, 0xc, 16),
+	CYGNUS_PIN_GROUP(smart_card0, 0xc, 20),
+	CYGNUS_PIN_GROUP(smart_card1, 0xc, 24),
+	CYGNUS_PIN_GROUP(spi0, 0x10, 0),
+	CYGNUS_PIN_GROUP(spi1, 0x10, 4),
+	CYGNUS_PIN_GROUP(spi2, 0x10, 8),
+	CYGNUS_PIN_GROUP(spi3, 0x10, 12),
+	CYGNUS_PIN_GROUP(d1w, 0x10, 16),
+	CYGNUS_PIN_GROUP(lcd, 0x10, 20),
+	CYGNUS_PIN_GROUP(uart0, 0x14, 0),
+	CYGNUS_PIN_GROUP(uart1_dte, 0x14, 4),
+	CYGNUS_PIN_GROUP(uart1, 0x14, 8),
+	CYGNUS_PIN_GROUP(uart3, 0x14, 12),
+	CYGNUS_PIN_GROUP(qspi, 0x14, 16),
+	CYGNUS_PIN_GROUP(nand, 0x14, 20),
+	CYGNUS_PIN_GROUP(sdio0_cd, 0x18, 0),
+	CYGNUS_PIN_GROUP(sdio0_mmc, 0x18, 4),
+	CYGNUS_PIN_GROUP(can0_spi4, 0x18, 8),
+	CYGNUS_PIN_GROUP(can1_spi4, 0x18, 12),
+	CYGNUS_PIN_GROUP(sdio1_cd, 0x18, 16),
+	CYGNUS_PIN_GROUP(sdio1_led, 0x18, 20),
+	CYGNUS_PIN_GROUP(sdio1_mmc, 0x18, 24),
+	CYGNUS_PIN_GROUP(camera_led, 0x1c, 0),
+	CYGNUS_PIN_GROUP(camera_rgmii, 0x1c, 4),
+	CYGNUS_PIN_GROUP(camera_sram_rgmii, 0x1c, 8),
+	CYGNUS_PIN_GROUP(qspi_gpio, 0x1c, 12),
+	CYGNUS_PIN_GROUP(smart_card0_fcb, 0x20, 0),
+	CYGNUS_PIN_GROUP(smart_card1_fcb, 0x20, 4),
+	CYGNUS_PIN_GROUP(gpio0_3p3, 0x28, 0),
+	CYGNUS_PIN_GROUP(gpio1_3p3, 0x28, 4),
+	CYGNUS_PIN_GROUP(gpio2_3p3, 0x28, 8),
+};
+
+#define CYGNUS_PIN_FUNCTION(fcn_name, mux_val)			\
+{								\
+	.name = #fcn_name,					\
+	.group_names = cygnus_pin_group_names,			\
+	.num_groups = ARRAY_SIZE(cygnus_pin_group_names),	\
+	.mux = mux_val,						\
+}
+
+/*
+ * Cygnus has 4 alternate functions. All groups can be configured to any of
+ * the 4 alternate functions
+ */
+static const struct cygnus_pin_function cygnus_pin_functions[] = {
+	CYGNUS_PIN_FUNCTION(alt1, 0),
+	CYGNUS_PIN_FUNCTION(alt2, 1),
+	CYGNUS_PIN_FUNCTION(alt3, 2),
+	CYGNUS_PIN_FUNCTION(alt4, 3),
+};
+
+static int cygnus_get_groups_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_groups;
+}
+
+static const char *cygnus_get_group_name(struct pinctrl_dev *pctrl_dev,
+		unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->groups[selector].name;
+}
+
+static int cygnus_get_group_pins(struct pinctrl_dev *pctrl_dev,
+		unsigned selector, const unsigned **pins,
+		unsigned *num_pins)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*pins = pinctrl->groups[selector].pins;
+	*num_pins = pinctrl->groups[selector].num_pins;
+
+	return 0;
+}
+
+static void cygnus_pin_dbg_show(struct pinctrl_dev *pctrl_dev,
+		struct seq_file *s, unsigned offset)
+{
+	seq_printf(s, " %s", dev_name(pctrl_dev->dev));
+}
+
+static int find_matched_function(const char *function_name)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cygnus_pin_functions); i++) {
+		if (!strcmp(cygnus_pin_functions[i].name, function_name))
+			return (int)cygnus_pin_functions[i].mux;
+	}
+
+	return -EINVAL;
+}
+
+static int cygnus_dt_node_to_map(struct pinctrl_dev *pctrl_dev,
+		struct device_node *np, struct pinctrl_map **map,
+		unsigned *num_maps)
+{
+	int ret, num_groups;
+	unsigned reserved_maps = 0;
+	struct property *prop;
+	const char *group_name, *function_name;
+
+	*map = NULL;
+	*num_maps = 0;
+
+	num_groups = of_property_count_strings(np, "brcm,groups");
+	if (num_groups < 0) {
+		dev_err(pctrl_dev->dev,
+			"could not parse property brcm,groups\n");
+		return -EINVAL;
+	}
+
+	ret = of_property_read_string(np, "brcm,function", &function_name);
+	if (ret < 0) {
+		dev_err(pctrl_dev->dev,
+			"could not parse property brcm,function\n");
+		return -EINVAL;
+	}
+
+	/* make sure it's a valid alternate function */
+	ret = find_matched_function(function_name);
+	if (ret < 0) {
+		dev_err(pctrl_dev->dev, "invalid function name: %s\n",
+				function_name);
+	}
+
+	ret = pinctrl_utils_reserve_map(pctrl_dev, map, &reserved_maps,
+			num_maps, num_groups);
+	if (ret) {
+		dev_err(pctrl_dev->dev, "unable to reserve map\n");
+		return ret;
+	}
+
+	of_property_for_each_string(np, "brcm,groups", prop, group_name) {
+		ret = pinctrl_utils_add_map_mux(pctrl_dev, map,
+				&reserved_maps, num_maps, group_name,
+				function_name);
+		if (ret) {
+			dev_err(pctrl_dev->dev, "can't add map: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static struct pinctrl_ops cygnus_pinctrl_ops = {
+	.get_groups_count = cygnus_get_groups_count,
+	.get_group_name = cygnus_get_group_name,
+	.get_group_pins = cygnus_get_group_pins,
+	.pin_dbg_show = cygnus_pin_dbg_show,
+	.dt_node_to_map = cygnus_dt_node_to_map,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_functions;
+}
+
+static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
+		unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->functions[selector].name;
+}
+
+static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
+	unsigned selector, const char * const **groups,
+	unsigned * const num_groups)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*groups = pinctrl->functions[selector].group_names;
+	*num_groups = pinctrl->functions[selector].num_groups;
+
+	return 0;
+}
+
+static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
+		unsigned function_selector, unsigned group_selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	const struct cygnus_pin_function *function =
+			&pinctrl->functions[function_selector];
+	const struct cygnus_pin_group *group =
+			&pinctrl->groups[group_selector];
+	u32 val, mask = 0x7;
+
+	dev_dbg(pctrl_dev->dev,
+	"group:%s with offset:0x%08x shift:%u set to function: %s mux:%u\n",
+		group->name, group->offset, group->shift, function->name,
+		function->mux);
+
+	val = readl(pinctrl->base + group->offset);
+	val &= ~(mask << group->shift);
+	val |= function->mux << group->shift;
+	writel(val, pinctrl->base + group->offset);
+
+	return 0;
+}
+
+static struct pinmux_ops cygnus_pinmux_ops = {
+	.get_functions_count = cygnus_get_functions_count,
+	.get_function_name = cygnus_get_function_name,
+	.get_function_groups = cygnus_get_function_groups,
+	.set_mux = cygnus_pinmux_set_mux,
+};
+
+static struct pinctrl_desc cygnus_pinctrl_desc = {
+	.pctlops = &cygnus_pinctrl_ops,
+	.pmxops = &cygnus_pinmux_ops,
+	.owner = THIS_MODULE,
+};
+
+static int cygnus_pinctrl_probe(struct platform_device *pdev)
+{
+	struct cygnus_pinctrl *pinctrl;
+	struct resource *res;
+
+	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
+	if (!pinctrl) {
+		dev_err(&pdev->dev, "unable to allocate memory\n");
+		return -ENOMEM;
+	}
+	pinctrl->dev = &pdev->dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "unable to get resource\n");
+		return -ENOENT;
+	}
+
+	pinctrl->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pinctrl->base)) {
+		dev_err(&pdev->dev, "unable to map I/O space\n");
+		return PTR_ERR(pinctrl->base);
+	}
+
+	pinctrl->pins = cygnus_pinctrl_pins;
+	pinctrl->num_pins = ARRAY_SIZE(cygnus_pinctrl_pins);
+	pinctrl->groups = cygnus_pin_groups;
+	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
+	pinctrl->functions = cygnus_pin_functions;
+	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
+
+	cygnus_pinctrl_desc.name = dev_name(&pdev->dev);
+	cygnus_pinctrl_desc.pins = cygnus_pinctrl_pins;
+	cygnus_pinctrl_desc.npins = ARRAY_SIZE(cygnus_pinctrl_pins);
+
+	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
+			pinctrl);
+	if (!pinctrl->pctl) {
+		dev_err(&pdev->dev, "unable to register cygnus pinctrl\n");
+		return -EINVAL;
+	}
+
+	platform_set_drvdata(pdev, pinctrl);
+
+	return 0;
+}
+
+static int cygnus_pinctrl_remove(struct platform_device *pdev)
+{
+	struct cygnus_pinctrl *pinctrl = platform_get_drvdata(pdev);
+
+	pinctrl_unregister(pinctrl->pctl);
+	platform_set_drvdata(pdev, NULL);
+
+	return 0;
+}
+
+static struct of_device_id cygnus_pinctrl_of_match[] = {
+	{ .compatible = "brcm,cygnus-pinctrl", },
+	{ },
+};
+
+static struct platform_driver cygnus_pinctrl_driver = {
+	.driver = {
+		.name = "cygnus-pinctrl",
+		.owner = THIS_MODULE,
+		.of_match_table = cygnus_pinctrl_of_match,
+	},
+	.probe = cygnus_pinctrl_probe,
+	.remove = cygnus_pinctrl_remove,
+};
+
+static int __init cygnus_pinctrl_init(void)
+{
+	return platform_driver_register(&cygnus_pinctrl_driver);
+}
+arch_initcall(cygnus_pinctrl_init);
+
+static void __exit cygnus_pinctrl_exit(void)
+{
+	platform_driver_unregister(&cygnus_pinctrl_driver);
+}
+module_exit(cygnus_pinctrl_exit);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus pinctrl driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

[PATCH v2 3/4] ARM: mach-bcm: enable pinctrl support for Cygnus

[Ray Jui]

This enables the pinctrl driver for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 arch/arm/mach-bcm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index aaeec78..b4efff2 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -29,6 +29,7 @@ config ARCH_BCM_IPROC
 config ARCH_BCM_CYGNUS
 	bool "Broadcom Cygnus Support" if ARCH_MULTI_V7
 	select ARCH_BCM_IPROC
+	select PINCTRL_BCM_CYGNUS
 	help
 	  Enable support for the Cygnus family,
 	  which includes the following variants:
-- 
1.7.9.5

[PATCH v2 4/4] ARM: dts: enable pinctrl for Broadcom Cygnus

[Ray Jui]

This enables the pinctrl support for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..4c6bf4d 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,11 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	pinctrl: pinctrl@0x0301d0c8 {
+		compatible = "brcm,cygnus-pinctrl";
+		reg = <0x0301d0c8 0x2c>;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v2 0/5] Add gpio support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the same Cygnus GPIO driver

Changes from v1:
 - Get rid of inline qualifier
 - Get rid of redundant check in the ISR
 - Other minor fixes to imrove code readability

Ray Jui (5):
  gpio: Cygnus: define Broadcom Cygnus GPIO binding
  gpio: Cygnus: add GPIO driver
  ARM: mach-bcm: Enable GPIO support for Cygnus
  ARM: dts: enable GPIO for Broadcom Cygnus
  MAINTAINERS: Entry for Cygnus GPIO driver

 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   85 +++
 MAINTAINERS                                        |    7 +
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   30 +
 arch/arm/mach-bcm/Kconfig                          |    1 +
 drivers/gpio/Kconfig                               |   11 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/gpio-bcm-cygnus.c                     |  712 ++++++++++++++++++++
 7 files changed, 847 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

-- 
1.7.9.5

[PATCH v2 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

Document the GPIO device tree binding for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   85 ++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt

diff --git a/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
new file mode 100644
index 0000000..24a1513
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
@@ -0,0 +1,85 @@
+Broadcom Cygnus GPIO Controller
+
+Required properties:
+
+- compatible:
+    Currently supported Cygnus GPIO controllers include:
+    "brcm,cygnus-ccm-gpio": ChipcommonG GPIO controller
+    "brcm,cygnus-asiu-gpio": ASIU GPIO controller
+    "brcm,cygnus-crmu-gpio": CRMU GPIO controller
+
+- reg:
+    Define the base and range of the I/O address space that contain the Cygnus
+GPIO controller registers
+
+- ngpios:
+    Total number of GPIOs the controller provides
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's domain) and the second cell is used for the following:
+    bit[0]: polarity (0 for normal and 1 for inverted)
+    bit[18:16]: internal pull up/down: 0 - pull up/down disabled
+                                       1 - pull up enabled
+                                       2 - pull down enabled
+    bit[22:20]: drive strength: 0 - 2 mA
+                                1 - 4 mA
+                                2 - 6 mA
+                                3 - 8 mA
+                                4 - 10 mA
+                                5 - 12 mA
+                                6 - 14 mA
+                                7 - 16 mA
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller. Not all Cygnus GPIO
+interfaces support interrupt, e.g., the CRMU GPIO controller does not have its
+interrupt routed to the main processor's GIC
+
+- interrupts:
+    The interrupt outputs from the GPIO controller.
+
+- no-interrupt:
+    Specifies that the GPIO interface does not support interrupt
+
+Example:
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-asiu-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-crmu-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-interrupt;
+	};
+
+	/*
+	 * Touchscreen that uses the ASIU GPIO 100, with internal pull-up
+	 * enabled
+	 */
+	tsc {
+		...
+		...
+		gpio-event = <&gpio_asiu 100 0x10000>;
+	};
+
+	/* Bluetooth that uses the CRMU GPIO 2, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_crmu 2 1>
+	}
-- 
1.7.9.5

Re: [PATCH v2 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Arnd Bergmann]

On Sunday 07 December 2014 18:38:32 Ray Jui wrote:
> +Required properties:
> +
> +- compatible:
> +    Currently supported Cygnus GPIO controllers include:
> +    "brcm,cygnus-ccm-gpio": ChipcommonG GPIO controller
> +    "brcm,cygnus-asiu-gpio": ASIU GPIO controller
> +    "brcm,cygnus-crmu-gpio": CRMU GPIO controller

How different are these? If they are almost the same, would it
be better to use the same compatible string for all of them and
describe the differences in extra properties?

If they are rather different, maybe you should have a separate
binding and driver for each?

	Arnd

Re: [PATCH v2 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

On 12/8/2014 3:22 AM, Arnd Bergmann wrote:
> On Sunday 07 December 2014 18:38:32 Ray Jui wrote:
>> +Required properties:
>> +
>> +- compatible:
>> +    Currently supported Cygnus GPIO controllers include:
>> +    "brcm,cygnus-ccm-gpio": ChipcommonG GPIO controller
>> +    "brcm,cygnus-asiu-gpio": ASIU GPIO controller
>> +    "brcm,cygnus-crmu-gpio": CRMU GPIO controller
>
> How different are these? If they are almost the same, would it
> be better to use the same compatible string for all of them and
> describe the differences in extra properties?
>
> If they are rather different, maybe you should have a separate
> binding and driver for each?
>
> 	Arnd
>
They are quite similar with the following minor differences:
1) ChipcommonG GPIO controller uses a separate register block 
(0x0301d164) to control drive stregnth
2) Cannot control drive strength for the CMRU GPIO
3) CRMU GPIO controller's interrupt is not connected to GIC of A9. 
Currently that's taken care of by using a "no-interrupt" device tree 
property

I can change to use the common compatible string "brcm,cygnus-gpio". 
With an introduction of property "no-drv-stregnth" which should be set 
for CRMU GPIO controller. For ChipcommonG GPIO, it will have a second 
register block defined, so we'll know to use that second register block 
for drive strength configuration. For the rest, we assume normal drive 
strength configuration (i.e., ASIU in our case).

Looking at this again, it looks like the "no-interrupt" property is 
really redundant. For GPIO controller without interrupt connected to A9, 
we can simply leave its interrupt properties not defined. I'll get rid 
of it along with the above changes.
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Re: [PATCH v2 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Arnd Bergmann]

On Monday 08 December 2014 08:55:20 Ray Jui wrote:
> 
> On 12/8/2014 3:22 AM, Arnd Bergmann wrote:
> > On Sunday 07 December 2014 18:38:32 Ray Jui wrote:
> >> +Required properties:
> >> +
> >> +- compatible:
> >> +    Currently supported Cygnus GPIO controllers include:
> >> +    "brcm,cygnus-ccm-gpio": ChipcommonG GPIO controller
> >> +    "brcm,cygnus-asiu-gpio": ASIU GPIO controller
> >> +    "brcm,cygnus-crmu-gpio": CRMU GPIO controller
> >
> > How different are these? If they are almost the same, would it
> > be better to use the same compatible string for all of them and
> > describe the differences in extra properties?
> >
> > If they are rather different, maybe you should have a separate
> > binding and driver for each?
> >
> > 	Arnd
> >
> They are quite similar with the following minor differences:
> 1) ChipcommonG GPIO controller uses a separate register block 
> (0x0301d164) to control drive stregnth
> 2) Cannot control drive strength for the CMRU GPIO

This can be deducted from having one or two register blocks I
assume.

> 3) CRMU GPIO controller's interrupt is not connected to GIC of A9. 
> Currently that's taken care of by using a "no-interrupt" device tree 
> property

No need for this property even, just see if there is an "interrupts"
property or not.
 
> I can change to use the common compatible string "brcm,cygnus-gpio". 
> With an introduction of property "no-drv-stregnth" which should be set 
> for CRMU GPIO controller. 

Ok.

> For ChipcommonG GPIO, it will have a second 
> register block defined, so we'll know to use that second register block 
> for drive strength configuration. For the rest, we assume normal drive 
> strength configuration (i.e., ASIU in our case).

Maybe see if something older than cygnus was already using a compatible
gpio controller and then use the name of that.

> Looking at this again, it looks like the "no-interrupt" property is 
> really redundant. For GPIO controller without interrupt connected to A9, 
> we can simply leave its interrupt properties not defined. I'll get rid 
> of it along with the above changes.

Right.

	Arnd

[PATCH v2 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller
("brcm,cygnus-asiu-gpio"), 2) the chipCommonG GPIO controller
("brcm,cygnus-ccm-gpio"), and 3) the ALWAYS-ON GPIO controller
("brcm,cygnus-crmu-gpio")

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/gpio/Kconfig           |   11 +
 drivers/gpio/Makefile          |    1 +
 drivers/gpio/gpio-bcm-cygnus.c |  712 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 724 insertions(+)
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 633ec21..3e3b0342 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -126,6 +126,17 @@ config GPIO_74XX_MMIO
 	    8 bits:	74244 (Input), 74273 (Output)
 	    16 bits:	741624 (Input), 7416374 (Output)
 
+config GPIO_BCM_CYGNUS
+	bool "Broadcom Cygnus GPIO support"
+	depends on ARCH_BCM_CYGNUS && OF_GPIO
+	help
+	  Say yes here to turn on GPIO support for Broadcom Cygnus SoC
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU). All 3 GPIO controllers are
+	  supported by this driver
+
 config GPIO_CLPS711X
 	tristate "CLPS711X GPIO support"
 	depends on ARCH_CLPS711X || COMPILE_TEST
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 81755f1..31eb7e0 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5520)	+= gpio-adp5520.o
 obj-$(CONFIG_GPIO_ADP5588)	+= gpio-adp5588.o
 obj-$(CONFIG_GPIO_AMD8111)	+= gpio-amd8111.o
 obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizona.o
+obj-$(CONFIG_GPIO_BCM_CYGNUS)	+= gpio-bcm-cygnus.o
 obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
 obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
 obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
new file mode 100644
index 0000000..873dce2
--- /dev/null
+++ b/drivers/gpio/gpio-bcm-cygnus.c
@@ -0,0 +1,712 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/irqchip/chained_irq.h>
+
+#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
+#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
+#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
+#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
+#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
+#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
+#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
+#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
+#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
+#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
+#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
+#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
+
+/* drive strength control for ASIU GPIO */
+#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+
+/* drive strength control for CCM GPIO */
+#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
+
+#define GPIO_BANK_SIZE 0x200
+#define NGPIOS_PER_BANK 32
+#define GPIO_BIT(pin) ((pin) % NGPIOS_PER_BANK)
+#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
+
+#define GPIO_FLAG_BIT_MASK           0xffff
+#define GPIO_PULL_BIT_SHIFT          16
+#define GPIO_PULL_BIT_MASK           0x3
+
+#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
+#define GPIO_DRV_STRENGTH_BITS       3
+#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
+
+/*
+ * For GPIO internal pull up/down registers
+ */
+enum gpio_pull {
+	GPIO_PULL_NONE = 0,
+	GPIO_PULL_UP,
+	GPIO_PULL_DOWN,
+	GPIO_PULL_INVALID,
+};
+
+/*
+ * GPIO drive strength
+ */
+enum gpio_drv_strength {
+	GPIO_DRV_STRENGTH_2MA = 0,
+	GPIO_DRV_STRENGTH_4MA,
+	GPIO_DRV_STRENGTH_6MA,
+	GPIO_DRV_STRENGTH_8MA,
+	GPIO_DRV_STRENGTH_10MA,
+	GPIO_DRV_STRENGTH_12MA,
+	GPIO_DRV_STRENGTH_14MA,
+	GPIO_DRV_STRENGTH_16MA,
+	GPIO_DRV_STRENGTH_INVALID,
+};
+
+struct bcm_cygnus_gpio {
+	struct device *dev;
+	void __iomem *base;
+	void __iomem *io_ctrl;
+	spinlock_t lock;
+	struct gpio_chip gc;
+	unsigned num_banks;
+	int irq;
+	struct irq_domain *irq_domain;
+};
+
+static unsigned int gpio_base_index;
+
+static struct bcm_cygnus_gpio *to_bcm_cygnus_gpio(struct gpio_chip *gc)
+{
+	return container_of(gc, struct bcm_cygnus_gpio, gc);
+}
+
+static int bcm_cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+
+	return irq_find_mapping(cygnus_gpio->irq_domain, offset);
+}
+
+static unsigned int __gpio_reg_offset(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio)
+{
+	return GPIO_BANK(gpio) * GPIO_BANK_SIZE;
+}
+
+static unsigned int __gpio_bitpos(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio)
+{
+	return GPIO_BIT(gpio);
+}
+
+static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
+		struct irq_desc *desc)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio;
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int i, bit;
+
+	chained_irq_enter(chip, desc);
+
+	cygnus_gpio = irq_get_handler_data(irq);
+
+	/* go through the entire GPIO banks and handle all interrupts */
+	for (i = 0; i < cygnus_gpio->num_banks; i++) {
+		unsigned long val = readl(cygnus_gpio->base +
+				(i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_MSTAT_OFFSET);
+
+		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
+			unsigned pin = NGPIOS_PER_BANK * i + bit;
+			int child_irq =
+				bcm_cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
+
+			/*
+			 * Clear the interrupt before invoking the
+			 * handler, so we do not leave any window
+			 */
+			writel(1 << bit,
+				cygnus_gpio->base + (i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_CLR_OFFSET);
+
+			generic_handle_irq(child_irq);
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static void bcm_cygnus_gpio_irq_ack(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_CLR_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static void bcm_cygnus_gpio_irq_mask(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_MSK_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static void bcm_cygnus_gpio_irq_unmask(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_MSK_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static int bcm_cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int int_type, dual_edge, edge_lvl;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		int_type = 0;
+		dual_edge = 0;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		int_type = 0;
+		dual_edge = 0;
+		edge_lvl = 0;
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		int_type = 0;
+		dual_edge = 1;
+		edge_lvl = 0;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		int_type = 1;
+		dual_edge = 0;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		int_type = 1;
+		dual_edge = 0;
+		edge_lvl = 0;
+		break;
+
+	default:
+		dev_err(cygnus_gpio->dev, "invalid GPIO irq type 0x%x\n", type);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_IN_TYPE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= int_type << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_DE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= dual_edge << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_EDGE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= edge_lvl << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	return 0;
+}
+
+static struct irq_chip bcm_cygnus_gpio_irq_chip = {
+	.name = "bcm-cygnus-gpio",
+	.irq_ack = bcm_cygnus_gpio_irq_ack,
+	.irq_mask = bcm_cygnus_gpio_irq_mask,
+	.irq_unmask = bcm_cygnus_gpio_irq_unmask,
+	.irq_set_type = bcm_cygnus_gpio_irq_set_type,
+};
+
+static int bcm_cygnus_gpio_direction_input(struct gpio_chip *gc,
+		unsigned gpio)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_OUT_EN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+
+	return 0;
+}
+
+static int bcm_cygnus_gpio_direction_output(struct gpio_chip *gc,
+		unsigned gpio, int value)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_OUT_EN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_OUT_OFFSET;
+
+	val = readl(cygnus_gpio->base + offset);
+	if (value)
+		val |= 1 << shift;
+	else
+		val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
+		gpio, offset, shift, val);
+
+	return 0;
+}
+
+static void bcm_cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio,
+		int value)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_OUT_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	if (value)
+		val |= 1 << shift;
+	else
+		val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
+		gpio, offset, shift, val);
+}
+
+static int bcm_cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_IN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = readl(cygnus_gpio->base + offset);
+	val = (val >> shift) & 1;
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u val:%u\n",
+			gpio, offset, shift, val);
+
+	return val;
+}
+
+static struct lock_class_key gpio_lock_class;
+
+static int bcm_cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+				 irq_hw_number_t hwirq)
+{
+	int ret;
+
+	ret = irq_set_chip_data(irq, d->host_data);
+	if (ret < 0)
+		return ret;
+	irq_set_lockdep_class(irq, &gpio_lock_class);
+	irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
+			handle_simple_irq);
+	set_irq_flags(irq, IRQF_VALID);
+
+	return 0;
+}
+
+static void bcm_cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static struct irq_domain_ops bcm_cygnus_irq_ops = {
+	.map = bcm_cygnus_gpio_irq_map,
+	.unmap = bcm_cygnus_gpio_irq_unmap,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+#ifdef CONFIG_OF_GPIO
+static void bcm_cygnus_gpio_set_pull(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_pull pull)
+{
+	unsigned int offset, shift;
+	u32 val, pullup;
+	unsigned long flags;
+
+	switch (pull) {
+	case GPIO_PULL_UP:
+		pullup = 1;
+		break;
+	case GPIO_PULL_DOWN:
+		pullup = 0;
+		break;
+	case GPIO_PULL_NONE:
+	case GPIO_PULL_INVALID:
+	default:
+		return;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	/* set pull up/down */
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_PAD_RES_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	if (pullup)
+		val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	/* enable pad */
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_RES_EN_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static void bcm_cygnus_gpio_set_strength(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_drv_strength strength)
+{
+	struct device *dev = cygnus_gpio->dev;
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	if (of_device_is_compatible(dev->of_node, "brcm,cygnus-asiu-gpio")) {
+		base = cygnus_gpio->base;
+		offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+			CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET;
+	} else if (of_device_is_compatible(dev->of_node,
+			"brcm,cygnus-ccm-gpio")) {
+		if (!cygnus_gpio->io_ctrl)
+			return;
+
+		base = cygnus_gpio->io_ctrl;
+		offset = CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET;
+	} else
+		return;
+
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset);
+		val &= ~(1 << shift);
+		val |= ((strength >> i) & 0x1) << shift;
+		writel(val, base + offset);
+		offset += 4;
+	}
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static int bcm_cygnus_gpio_of_xlate(struct gpio_chip *gc,
+		const struct of_phandle_args *gpiospec, u32 *flags)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	enum gpio_pull pull;
+	enum gpio_drv_strength strength;
+
+	if (gc->of_gpio_n_cells < 2)
+		return -EINVAL;
+
+	if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+		return -EINVAL;
+
+	if (gpiospec->args[0] >= gc->ngpio)
+		return -EINVAL;
+
+	pull = (gpiospec->args[1] >> GPIO_PULL_BIT_SHIFT) & GPIO_PULL_BIT_MASK;
+	if (WARN_ON(pull >= GPIO_PULL_INVALID))
+		return -EINVAL;
+
+	strength = (gpiospec->args[1] >> GPIO_DRV_STRENGTH_BIT_SHIFT) &
+		GPIO_DRV_STRENGTH_BIT_MASK;
+
+	if (flags)
+		*flags = gpiospec->args[1] & GPIO_FLAG_BIT_MASK;
+
+	bcm_cygnus_gpio_set_pull(cygnus_gpio, gpiospec->args[0], pull);
+	bcm_cygnus_gpio_set_strength(cygnus_gpio, gpiospec->args[0], strength);
+
+	return gpiospec->args[0];
+}
+#endif
+
+static const struct of_device_id bcm_cygnus_gpio_of_match[] = {
+	{ .compatible = "brcm,cygnus-crmu-gpio" },
+	{ .compatible = "brcm,cygnus-asiu-gpio" },
+	{ .compatible = "brcm,cygnus-ccm-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bcm_cygnus_gpio_of_match);
+
+static int bcm_cygnus_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *match;
+	struct resource *res;
+	struct bcm_cygnus_gpio *cygnus_gpio;
+	struct gpio_chip *gc;
+	u32 i, ngpios;
+	int ret;
+
+	match = of_match_device(bcm_cygnus_gpio_of_match, dev);
+	if (!match) {
+		dev_err(&pdev->dev, "failed to find GPIO controller\n");
+		return -ENODEV;
+	}
+
+	cygnus_gpio = devm_kzalloc(dev, sizeof(*cygnus_gpio), GFP_KERNEL);
+	if (!cygnus_gpio)
+		return -ENOMEM;
+
+	cygnus_gpio->dev = dev;
+	platform_set_drvdata(pdev, cygnus_gpio);
+
+	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+		dev_err(&pdev->dev, "missing ngpios device tree property\n");
+		return -ENODEV;
+	}
+	cygnus_gpio->num_banks = (ngpios + NGPIOS_PER_BANK - 1) /
+		NGPIOS_PER_BANK;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "unable to get I/O resource\n");
+		return -ENODEV;
+	}
+
+	cygnus_gpio->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(cygnus_gpio->base)) {
+		dev_err(&pdev->dev, "unable to map I/O memory\n");
+		return PTR_ERR(cygnus_gpio->base);
+	}
+
+	/*
+	 * Only certain types of Cygnus GPIO interfaces have I/O control
+	 * registers
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		cygnus_gpio->io_ctrl = devm_ioremap_resource(dev, res);
+		if (IS_ERR(cygnus_gpio->io_ctrl)) {
+			dev_err(&pdev->dev, "unable to map I/O memory\n");
+			return PTR_ERR(cygnus_gpio->io_ctrl);
+		}
+	}
+
+	spin_lock_init(&cygnus_gpio->lock);
+
+	gc = &cygnus_gpio->gc;
+	gc->base = gpio_base_index;
+	gpio_base_index += ngpios;
+	gc->ngpio = ngpios;
+	gc->label = dev_name(dev);
+	gc->dev = dev;
+#ifdef CONFIG_OF_GPIO
+	gc->of_node = dev->of_node;
+	gc->of_gpio_n_cells = 2;
+	gc->of_xlate = bcm_cygnus_gpio_of_xlate;
+#endif
+	gc->direction_input = bcm_cygnus_gpio_direction_input;
+	gc->direction_output = bcm_cygnus_gpio_direction_output;
+	gc->set = bcm_cygnus_gpio_set;
+	gc->get = bcm_cygnus_gpio_get;
+	gc->to_irq = bcm_cygnus_gpio_to_irq;
+
+	ret = gpiochip_add(gc);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "unable to add GPIO chip\n");
+		goto err_dec_gpio_base;
+	}
+
+	/*
+	 * Some of the GPIO interfaces do not have interrupt wired to the main
+	 * processor
+	 */
+	if (of_find_property(dev->of_node, "no-interrupt", NULL))
+		return 0;
+
+	cygnus_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
+			gc->ngpio, &bcm_cygnus_irq_ops, cygnus_gpio);
+	if (!cygnus_gpio->irq_domain) {
+		dev_err(&pdev->dev, "unable to allocate IRQ domain\n");
+		ret = -ENXIO;
+		goto err_rm_gpiochip;
+	}
+
+	cygnus_gpio->irq = platform_get_irq(pdev, 0);
+	if (cygnus_gpio->irq < 0) {
+		dev_err(&pdev->dev, "unable to get IRQ\n");
+		ret = cygnus_gpio->irq;
+		goto err_rm_irq_domain;
+	}
+
+	for (i = 0; i < gc->ngpio; i++) {
+		int irq = irq_create_mapping(cygnus_gpio->irq_domain, i);
+
+		irq_set_lockdep_class(irq, &gpio_lock_class);
+		irq_set_chip_data(irq, cygnus_gpio);
+		irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
+				handle_simple_irq);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	irq_set_chained_handler(cygnus_gpio->irq, bcm_cygnus_gpio_irq_handler);
+	irq_set_handler_data(cygnus_gpio->irq, cygnus_gpio);
+
+	return 0;
+
+err_rm_irq_domain:
+	irq_domain_remove(cygnus_gpio->irq_domain);
+
+err_rm_gpiochip:
+	gpiochip_remove(gc);
+
+err_dec_gpio_base:
+	gpio_base_index -= ngpios;
+	return ret;
+}
+
+static struct platform_driver bcm_cygnus_gpio_driver = {
+	.driver = {
+		.name = "bcm-cygnus-gpio",
+		.owner = THIS_MODULE,
+		.of_match_table = bcm_cygnus_gpio_of_match,
+	},
+	.probe = bcm_cygnus_gpio_probe,
+};
+
+module_platform_driver(bcm_cygnus_gpio_driver);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

[PATCH v2 3/5] ARM: mach-bcm: Enable GPIO support for Cygnus

[Ray Jui]

Enable GPIO driver for Broadcom Cygnus SoC by selecting GPIO_BCM_CYGNUS

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/mach-bcm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index aaeec78..5066d5d 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -29,6 +29,7 @@ config ARCH_BCM_IPROC
 config ARCH_BCM_CYGNUS
 	bool "Broadcom Cygnus Support" if ARCH_MULTI_V7
 	select ARCH_BCM_IPROC
+	select GPIO_BCM_CYGNUS
 	help
 	  Enable support for the Cygnus family,
 	  which includes the following variants:
-- 
1.7.9.5

[PATCH v2 4/5] ARM: dts: enable GPIO for Broadcom Cygnus

[Ray Jui]

This enables all 3 GPIO controllers including the ASIU GPIO, the
chipcommonG GPIO, and the ALWAYS-ON GPIO, for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |   30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..c7587c1 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,36 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-ccm-gpio";
+		reg = <0x1800a000 0x50>,
+			<0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-asiu-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-crmu-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-interrupt;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v2 5/5] MAINTAINERS: Entry for Cygnus GPIO driver

[Ray Jui]

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 MAINTAINERS |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index e6bff3a..8473422 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2202,6 +2202,13 @@ N:	bcm9583*
 N:	bcm583*
 N:	bcm113*
 
+BROADCOM CYGNUS GPIO DRIVER
+M:	Ray Jui <rjui@broadcom.com>
+L:	bcm-kernel-feedback-list@broadcom.com
+S:	Supported
+F:	drivers/gpio/gpio-bcm-cygnus.c
+F:	Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
+
 BROADCOM KONA GPIO DRIVER
 M:	Ray Jui <rjui@broadcom.com>
 L:	bcm-kernel-feedback-list@broadcom.com
-- 
1.7.9.5

[PATCH v3 0/5] Add gpio support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the same Cygnus GPIO driver

Changes from v2:
 - Consolidate different compatible IDs into "brcm,cygnus-gpio"
 - Get rid of redundant "no-interrupt" property

Changes from v1:
 - Get rid of inline qualifier
 - Get rid of redundant check in the ISR
 - Other minor fixes to imrove code readability

Ray Jui (5):
  gpio: Cygnus: define Broadcom Cygnus GPIO binding
  gpio: Cygnus: add GPIO driver
  ARM: mach-bcm: Enable GPIO support for Cygnus
  ARM: dts: enable GPIO for Broadcom Cygnus
  MAINTAINERS: Entry for Cygnus GPIO driver

 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   82 +++
 MAINTAINERS                                        |    7 +
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   30 +
 arch/arm/mach-bcm/Kconfig                          |    1 +
 drivers/gpio/Kconfig                               |   11 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/gpio-bcm-cygnus.c                     |  705 ++++++++++++++++++++
 7 files changed, 837 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

-- 
1.7.9.5

[PATCH v2 0/5] Add gpio support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the same Cygnus GPIO driver

Changes from v1:
 - Get rid of inline qualifier
 - Get rid of redundant check in the ISR
 - Other minor fixes to imrove code readability

Ray Jui (5):
  gpio: Cygnus: define Broadcom Cygnus GPIO binding
  gpio: Cygnus: add GPIO driver
  ARM: mach-bcm: Enable GPIO support for Cygnus
  ARM: dts: enable GPIO for Broadcom Cygnus
  MAINTAINERS: Entry for Cygnus GPIO driver

 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   85 +++
 MAINTAINERS                                        |    7 +
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   30 +
 arch/arm/mach-bcm/Kconfig                          |    1 +
 drivers/gpio/Kconfig                               |   11 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/gpio-bcm-cygnus.c                     |  712 ++++++++++++++++++++
 7 files changed, 847 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

-- 
1.7.9.5

Re: [PATCH v2 0/5] Add gpio support to Broadcom Cygnus SoC

[Ray Jui]

Sorry. Please ignore this particular cover letter. It accidentally got 
sent along with other v3 patches.

On 12/8/2014 10:47 AM, Ray Jui wrote:
> This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
> Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
> and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
> the same Cygnus GPIO driver
>
> Changes from v1:
>   - Get rid of inline qualifier
>   - Get rid of redundant check in the ISR
>   - Other minor fixes to imrove code readability
>
> Ray Jui (5):
>    gpio: Cygnus: define Broadcom Cygnus GPIO binding
>    gpio: Cygnus: add GPIO driver
>    ARM: mach-bcm: Enable GPIO support for Cygnus
>    ARM: dts: enable GPIO for Broadcom Cygnus
>    MAINTAINERS: Entry for Cygnus GPIO driver
>
>   .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   85 +++
>   MAINTAINERS                                        |    7 +
>   arch/arm/boot/dts/bcm-cygnus.dtsi                  |   30 +
>   arch/arm/mach-bcm/Kconfig                          |    1 +
>   drivers/gpio/Kconfig                               |   11 +
>   drivers/gpio/Makefile                              |    1 +
>   drivers/gpio/gpio-bcm-cygnus.c                     |  712 ++++++++++++++++++++
>   7 files changed, 847 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
>   create mode 100644 drivers/gpio/gpio-bcm-cygnus.c
>
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[PATCH v3 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

Document the GPIO device tree binding for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   82 ++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt

diff --git a/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
new file mode 100644
index 0000000..c477271
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
@@ -0,0 +1,82 @@
+Broadcom Cygnus GPIO Controller
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-gpio"
+
+- reg:
+    Define the base and range of the I/O address space that contain the Cygnus
+GPIO controller registers
+
+- ngpios:
+    Total number of GPIOs the controller provides
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's domain) and the second cell is used for the following:
+    bit[0]: polarity (0 for normal and 1 for inverted)
+    bit[18:16]: internal pull up/down: 0 - pull up/down disabled
+                                       1 - pull up enabled
+                                       2 - pull down enabled
+    bit[22:20]: drive strength: 0 - 2 mA
+                                1 - 4 mA
+                                2 - 6 mA
+                                3 - 8 mA
+                                4 - 10 mA
+                                5 - 12 mA
+                                6 - 14 mA
+                                7 - 16 mA
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller. Not all Cygnus GPIO
+interfaces support interrupt, e.g., the CRMU GPIO controller does not have its
+interrupt routed to the main processor's GIC
+
+- interrupts:
+    The interrupt outputs from the GPIO controller.
+
+- no-drv-stregnth:
+    Specifies the GPIO controller does not support drive strength configuration
+
+Example:
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-crmu-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-drv-stregnth;
+	};
+
+	/*
+	 * Touchscreen that uses the ASIU GPIO 100, with internal pull-up
+	 * enabled
+	 */
+	tsc {
+		...
+		...
+		gpio-event = <&gpio_asiu 100 0x10000>;
+	};
+
+	/* Bluetooth that uses the CRMU GPIO 2, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_crmu 2 1>
+	}
-- 
1.7.9.5

Re: [PATCH v3 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Arnd Bergmann]

On Monday 08 December 2014 10:47:44 Ray Jui wrote:
> +
> +- no-drv-stregnth:
> +    Specifies the GPIO controller does not support drive strength configuration
> +
> 

Typo:

	strength, not stregnth

Otherwise looks good.

	Arnd

Re: [PATCH v3 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

On 12/8/2014 11:38 AM, Arnd Bergmann wrote:
> On Monday 08 December 2014 10:47:44 Ray Jui wrote:
>> +
>> +- no-drv-stregnth:
>> +    Specifies the GPIO controller does not support drive strength configuration
>> +
>>
>
> Typo:
>
> 	strength, not stregnth
>
> Otherwise looks good.
>
> 	Arnd
>
Right...Let me fix that. Also noticed the following in the device tree 
binding example that needs to be fixed:
	gpio_crmu: gpio@03024800 {

		compatible = "brcm,cygnus-crmu-gpio";
The above line needs to be fixed with:
		compatible = "brcm,cygnus-gpio";

		reg = <0x03024800 0x50>;
		ngpios = <6>;
		#gpio-cells = <2>;
		gpio-controller;
		no-drv-stregnth;
	};

[PATCH v3 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller, 2) the
chipCommonG GPIO controller, and 3) the ALWAYS-ON GPIO controller

Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Scott Branden <sbranden-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
---
 drivers/gpio/Kconfig           |   11 +
 drivers/gpio/Makefile          |    1 +
 drivers/gpio/gpio-bcm-cygnus.c |  705 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 717 insertions(+)
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 633ec21..3e3b0342 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -126,6 +126,17 @@ config GPIO_74XX_MMIO
 	    8 bits:	74244 (Input), 74273 (Output)
 	    16 bits:	741624 (Input), 7416374 (Output)
 
+config GPIO_BCM_CYGNUS
+	bool "Broadcom Cygnus GPIO support"
+	depends on ARCH_BCM_CYGNUS && OF_GPIO
+	help
+	  Say yes here to turn on GPIO support for Broadcom Cygnus SoC
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU). All 3 GPIO controllers are
+	  supported by this driver
+
 config GPIO_CLPS711X
 	tristate "CLPS711X GPIO support"
 	depends on ARCH_CLPS711X || COMPILE_TEST
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 81755f1..31eb7e0 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5520)	+= gpio-adp5520.o
 obj-$(CONFIG_GPIO_ADP5588)	+= gpio-adp5588.o
 obj-$(CONFIG_GPIO_AMD8111)	+= gpio-amd8111.o
 obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizona.o
+obj-$(CONFIG_GPIO_BCM_CYGNUS)	+= gpio-bcm-cygnus.o
 obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
 obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
 obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
new file mode 100644
index 0000000..f1f69ce
--- /dev/null
+++ b/drivers/gpio/gpio-bcm-cygnus.c
@@ -0,0 +1,705 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/irqchip/chained_irq.h>
+
+#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
+#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
+#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
+#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
+#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
+#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
+#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
+#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
+#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
+#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
+#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
+#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
+
+/* drive strength control for ASIU GPIO */
+#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+
+/* drive strength control for CCM GPIO */
+#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
+
+#define GPIO_BANK_SIZE 0x200
+#define NGPIOS_PER_BANK 32
+#define GPIO_BIT(pin) ((pin) % NGPIOS_PER_BANK)
+#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
+
+#define GPIO_FLAG_BIT_MASK           0xffff
+#define GPIO_PULL_BIT_SHIFT          16
+#define GPIO_PULL_BIT_MASK           0x3
+
+#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
+#define GPIO_DRV_STRENGTH_BITS       3
+#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
+
+/*
+ * For GPIO internal pull up/down registers
+ */
+enum gpio_pull {
+	GPIO_PULL_NONE = 0,
+	GPIO_PULL_UP,
+	GPIO_PULL_DOWN,
+	GPIO_PULL_INVALID,
+};
+
+/*
+ * GPIO drive strength
+ */
+enum gpio_drv_strength {
+	GPIO_DRV_STRENGTH_2MA = 0,
+	GPIO_DRV_STRENGTH_4MA,
+	GPIO_DRV_STRENGTH_6MA,
+	GPIO_DRV_STRENGTH_8MA,
+	GPIO_DRV_STRENGTH_10MA,
+	GPIO_DRV_STRENGTH_12MA,
+	GPIO_DRV_STRENGTH_14MA,
+	GPIO_DRV_STRENGTH_16MA,
+	GPIO_DRV_STRENGTH_INVALID,
+};
+
+struct bcm_cygnus_gpio {
+	struct device *dev;
+	void __iomem *base;
+	void __iomem *io_ctrl;
+	spinlock_t lock;
+	struct gpio_chip gc;
+	unsigned num_banks;
+	int irq;
+	struct irq_domain *irq_domain;
+};
+
+static unsigned int gpio_base_index;
+
+static struct bcm_cygnus_gpio *to_bcm_cygnus_gpio(struct gpio_chip *gc)
+{
+	return container_of(gc, struct bcm_cygnus_gpio, gc);
+}
+
+static int bcm_cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+
+	return irq_find_mapping(cygnus_gpio->irq_domain, offset);
+}
+
+static unsigned int __gpio_reg_offset(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio)
+{
+	return GPIO_BANK(gpio) * GPIO_BANK_SIZE;
+}
+
+static unsigned int __gpio_bitpos(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio)
+{
+	return GPIO_BIT(gpio);
+}
+
+static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
+		struct irq_desc *desc)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio;
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int i, bit;
+
+	chained_irq_enter(chip, desc);
+
+	cygnus_gpio = irq_get_handler_data(irq);
+
+	/* go through the entire GPIO banks and handle all interrupts */
+	for (i = 0; i < cygnus_gpio->num_banks; i++) {
+		unsigned long val = readl(cygnus_gpio->base +
+				(i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_MSTAT_OFFSET);
+
+		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
+			unsigned pin = NGPIOS_PER_BANK * i + bit;
+			int child_irq =
+				bcm_cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
+
+			/*
+			 * Clear the interrupt before invoking the
+			 * handler, so we do not leave any window
+			 */
+			writel(1 << bit,
+				cygnus_gpio->base + (i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_CLR_OFFSET);
+
+			generic_handle_irq(child_irq);
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static void bcm_cygnus_gpio_irq_ack(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_CLR_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static void bcm_cygnus_gpio_irq_mask(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_MSK_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static void bcm_cygnus_gpio_irq_unmask(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_MSK_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static int bcm_cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int int_type, dual_edge, edge_lvl;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		int_type = 0;
+		dual_edge = 0;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		int_type = 0;
+		dual_edge = 0;
+		edge_lvl = 0;
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		int_type = 0;
+		dual_edge = 1;
+		edge_lvl = 0;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		int_type = 1;
+		dual_edge = 0;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		int_type = 1;
+		dual_edge = 0;
+		edge_lvl = 0;
+		break;
+
+	default:
+		dev_err(cygnus_gpio->dev, "invalid GPIO irq type 0x%x\n", type);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_IN_TYPE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= int_type << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_DE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= dual_edge << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_EDGE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= edge_lvl << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	return 0;
+}
+
+static struct irq_chip bcm_cygnus_gpio_irq_chip = {
+	.name = "bcm-cygnus-gpio",
+	.irq_ack = bcm_cygnus_gpio_irq_ack,
+	.irq_mask = bcm_cygnus_gpio_irq_mask,
+	.irq_unmask = bcm_cygnus_gpio_irq_unmask,
+	.irq_set_type = bcm_cygnus_gpio_irq_set_type,
+};
+
+static int bcm_cygnus_gpio_direction_input(struct gpio_chip *gc,
+		unsigned gpio)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_OUT_EN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+
+	return 0;
+}
+
+static int bcm_cygnus_gpio_direction_output(struct gpio_chip *gc,
+		unsigned gpio, int value)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_OUT_EN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_OUT_OFFSET;
+
+	val = readl(cygnus_gpio->base + offset);
+	if (value)
+		val |= 1 << shift;
+	else
+		val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
+		gpio, offset, shift, val);
+
+	return 0;
+}
+
+static void bcm_cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio,
+		int value)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_OUT_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	if (value)
+		val |= 1 << shift;
+	else
+		val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
+		gpio, offset, shift, val);
+}
+
+static int bcm_cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_IN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = readl(cygnus_gpio->base + offset);
+	val = (val >> shift) & 1;
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u val:%u\n",
+			gpio, offset, shift, val);
+
+	return val;
+}
+
+static struct lock_class_key gpio_lock_class;
+
+static int bcm_cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+				 irq_hw_number_t hwirq)
+{
+	int ret;
+
+	ret = irq_set_chip_data(irq, d->host_data);
+	if (ret < 0)
+		return ret;
+	irq_set_lockdep_class(irq, &gpio_lock_class);
+	irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
+			handle_simple_irq);
+	set_irq_flags(irq, IRQF_VALID);
+
+	return 0;
+}
+
+static void bcm_cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static struct irq_domain_ops bcm_cygnus_irq_ops = {
+	.map = bcm_cygnus_gpio_irq_map,
+	.unmap = bcm_cygnus_gpio_irq_unmap,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+#ifdef CONFIG_OF_GPIO
+static void bcm_cygnus_gpio_set_pull(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_pull pull)
+{
+	unsigned int offset, shift;
+	u32 val, pullup;
+	unsigned long flags;
+
+	switch (pull) {
+	case GPIO_PULL_UP:
+		pullup = 1;
+		break;
+	case GPIO_PULL_DOWN:
+		pullup = 0;
+		break;
+	case GPIO_PULL_NONE:
+	case GPIO_PULL_INVALID:
+	default:
+		return;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	/* set pull up/down */
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_PAD_RES_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	if (pullup)
+		val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	/* enable pad */
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_RES_EN_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static void bcm_cygnus_gpio_set_strength(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_drv_strength strength)
+{
+	struct device *dev = cygnus_gpio->dev;
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	/* some GPIO controllers do not support drive strength configuration */
+	if (of_find_property(dev->of_node, "no-drv-stregnth", NULL))
+		return;
+
+	if (cygnus_gpio->io_ctrl) {
+		base = cygnus_gpio->io_ctrl;
+		offset = CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET;
+	} else {
+		base = cygnus_gpio->base;
+		offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+			CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET;
+	}
+
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset);
+		val &= ~(1 << shift);
+		val |= ((strength >> i) & 0x1) << shift;
+		writel(val, base + offset);
+		offset += 4;
+	}
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static int bcm_cygnus_gpio_of_xlate(struct gpio_chip *gc,
+		const struct of_phandle_args *gpiospec, u32 *flags)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	enum gpio_pull pull;
+	enum gpio_drv_strength strength;
+
+	if (gc->of_gpio_n_cells < 2)
+		return -EINVAL;
+
+	if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+		return -EINVAL;
+
+	if (gpiospec->args[0] >= gc->ngpio)
+		return -EINVAL;
+
+	pull = (gpiospec->args[1] >> GPIO_PULL_BIT_SHIFT) & GPIO_PULL_BIT_MASK;
+	if (WARN_ON(pull >= GPIO_PULL_INVALID))
+		return -EINVAL;
+
+	strength = (gpiospec->args[1] >> GPIO_DRV_STRENGTH_BIT_SHIFT) &
+		GPIO_DRV_STRENGTH_BIT_MASK;
+
+	if (flags)
+		*flags = gpiospec->args[1] & GPIO_FLAG_BIT_MASK;
+
+	bcm_cygnus_gpio_set_pull(cygnus_gpio, gpiospec->args[0], pull);
+	bcm_cygnus_gpio_set_strength(cygnus_gpio, gpiospec->args[0], strength);
+
+	return gpiospec->args[0];
+}
+#endif
+
+static const struct of_device_id bcm_cygnus_gpio_of_match[] = {
+	{ .compatible = "brcm,cygnus-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bcm_cygnus_gpio_of_match);
+
+static int bcm_cygnus_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *match;
+	struct resource *res;
+	struct bcm_cygnus_gpio *cygnus_gpio;
+	struct gpio_chip *gc;
+	u32 i, ngpios;
+	int ret;
+
+	match = of_match_device(bcm_cygnus_gpio_of_match, dev);
+	if (!match) {
+		dev_err(&pdev->dev, "failed to find GPIO controller\n");
+		return -ENODEV;
+	}
+
+	cygnus_gpio = devm_kzalloc(dev, sizeof(*cygnus_gpio), GFP_KERNEL);
+	if (!cygnus_gpio)
+		return -ENOMEM;
+
+	cygnus_gpio->dev = dev;
+	platform_set_drvdata(pdev, cygnus_gpio);
+
+	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+		dev_err(&pdev->dev, "missing ngpios device tree property\n");
+		return -ENODEV;
+	}
+	cygnus_gpio->num_banks = (ngpios + NGPIOS_PER_BANK - 1) /
+		NGPIOS_PER_BANK;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "unable to get I/O resource\n");
+		return -ENODEV;
+	}
+
+	cygnus_gpio->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(cygnus_gpio->base)) {
+		dev_err(&pdev->dev, "unable to map I/O memory\n");
+		return PTR_ERR(cygnus_gpio->base);
+	}
+
+	/*
+	 * Only certain types of Cygnus GPIO interfaces have I/O control
+	 * registers
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		cygnus_gpio->io_ctrl = devm_ioremap_resource(dev, res);
+		if (IS_ERR(cygnus_gpio->io_ctrl)) {
+			dev_err(&pdev->dev, "unable to map I/O memory\n");
+			return PTR_ERR(cygnus_gpio->io_ctrl);
+		}
+	}
+
+	spin_lock_init(&cygnus_gpio->lock);
+
+	gc = &cygnus_gpio->gc;
+	gc->base = gpio_base_index;
+	gpio_base_index += ngpios;
+	gc->ngpio = ngpios;
+	gc->label = dev_name(dev);
+	gc->dev = dev;
+#ifdef CONFIG_OF_GPIO
+	gc->of_node = dev->of_node;
+	gc->of_gpio_n_cells = 2;
+	gc->of_xlate = bcm_cygnus_gpio_of_xlate;
+#endif
+	gc->direction_input = bcm_cygnus_gpio_direction_input;
+	gc->direction_output = bcm_cygnus_gpio_direction_output;
+	gc->set = bcm_cygnus_gpio_set;
+	gc->get = bcm_cygnus_gpio_get;
+	gc->to_irq = bcm_cygnus_gpio_to_irq;
+
+	ret = gpiochip_add(gc);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "unable to add GPIO chip\n");
+		goto err_dec_gpio_base;
+	}
+
+	/*
+	 * Some of the GPIO interfaces do not have interrupt wired to the main
+	 * processor
+	 */
+	cygnus_gpio->irq = platform_get_irq(pdev, 0);
+	if (cygnus_gpio->irq < 0) {
+		ret = cygnus_gpio->irq;
+		if (ret == -EPROBE_DEFER)
+			goto err_rm_gpiochip;
+
+		dev_info(&pdev->dev, "no interrupt hook\n");
+	}
+
+	cygnus_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
+			gc->ngpio, &bcm_cygnus_irq_ops, cygnus_gpio);
+	if (!cygnus_gpio->irq_domain) {
+		dev_err(&pdev->dev, "unable to allocate IRQ domain\n");
+		ret = -ENXIO;
+		goto err_rm_gpiochip;
+	}
+
+	for (i = 0; i < gc->ngpio; i++) {
+		int irq = irq_create_mapping(cygnus_gpio->irq_domain, i);
+
+		irq_set_lockdep_class(irq, &gpio_lock_class);
+		irq_set_chip_data(irq, cygnus_gpio);
+		irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
+				handle_simple_irq);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	irq_set_chained_handler(cygnus_gpio->irq, bcm_cygnus_gpio_irq_handler);
+	irq_set_handler_data(cygnus_gpio->irq, cygnus_gpio);
+
+	return 0;
+
+err_rm_gpiochip:
+	gpiochip_remove(gc);
+
+err_dec_gpio_base:
+	gpio_base_index -= ngpios;
+	return ret;
+}
+
+static struct platform_driver bcm_cygnus_gpio_driver = {
+	.driver = {
+		.name = "bcm-cygnus-gpio",
+		.owner = THIS_MODULE,
+		.of_match_table = bcm_cygnus_gpio_of_match,
+	},
+	.probe = bcm_cygnus_gpio_probe,
+};
+
+module_platform_driver(bcm_cygnus_gpio_driver);
+
+MODULE_AUTHOR("Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>");
+MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

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[PATCH v3 3/5] ARM: mach-bcm: Enable GPIO support for Cygnus

[Ray Jui]

Enable GPIO driver for Broadcom Cygnus SoC by selecting GPIO_BCM_CYGNUS

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/mach-bcm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index aaeec78..5066d5d 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -29,6 +29,7 @@ config ARCH_BCM_IPROC
 config ARCH_BCM_CYGNUS
 	bool "Broadcom Cygnus Support" if ARCH_MULTI_V7
 	select ARCH_BCM_IPROC
+	select GPIO_BCM_CYGNUS
 	help
 	  Enable support for the Cygnus family,
 	  which includes the following variants:
-- 
1.7.9.5

[PATCH v3 4/5] ARM: dts: enable GPIO for Broadcom Cygnus

[Ray Jui]

This enables all 3 GPIO controllers including the ASIU GPIO, the
chipcommonG GPIO, and the ALWAYS-ON GPIO, for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |   30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..48339d0 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,36 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x1800a000 0x50>,
+			<0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-drv-stregnth;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v3 5/5] MAINTAINERS: Entry for Cygnus GPIO driver

[Ray Jui]

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 MAINTAINERS |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index e6bff3a..8473422 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2202,6 +2202,13 @@ N:	bcm9583*
 N:	bcm583*
 N:	bcm113*
 
+BROADCOM CYGNUS GPIO DRIVER
+M:	Ray Jui <rjui@broadcom.com>
+L:	bcm-kernel-feedback-list@broadcom.com
+S:	Supported
+F:	drivers/gpio/gpio-bcm-cygnus.c
+F:	Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
+
 BROADCOM KONA GPIO DRIVER
 M:	Ray Jui <rjui@broadcom.com>
 L:	bcm-kernel-feedback-list@broadcom.com
-- 
1.7.9.5

[PATCH v4 0/5] Add gpio support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the same Cygnus GPIO driver

Changes from v3:
 - Fix dt property tpyo
 - Fix incorrect GPIO compatible ID in device tree binding document example

Changes from v2:
 - Consolidate different compatible IDs into "brcm,cygnus-gpio"
 - Get rid of redundant "no-interrupt" property

Changes from v1:
 - Get rid of inline qualifier
 - Get rid of redundant check in the ISR
 - Other minor fixes to imrove code readability

Ray Jui (5):
  gpio: Cygnus: define Broadcom Cygnus GPIO binding
  gpio: Cygnus: add GPIO driver
  ARM: mach-bcm: Enable GPIO support for Cygnus
  ARM: dts: enable GPIO for Broadcom Cygnus
  MAINTAINERS: Entry for Cygnus GPIO driver

 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   82 +++
 MAINTAINERS                                        |    7 +
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   30 +
 arch/arm/mach-bcm/Kconfig                          |    1 +
 drivers/gpio/Kconfig                               |   11 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/gpio-bcm-cygnus.c                     |  705 ++++++++++++++++++++
 7 files changed, 837 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

-- 
1.7.9.5

[PATCH v4 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

Document the GPIO device tree binding for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   82 ++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt

diff --git a/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
new file mode 100644
index 0000000..dca322a
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
@@ -0,0 +1,82 @@
+Broadcom Cygnus GPIO Controller
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-gpio"
+
+- reg:
+    Define the base and range of the I/O address space that contain the Cygnus
+GPIO controller registers
+
+- ngpios:
+    Total number of GPIOs the controller provides
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's domain) and the second cell is used for the following:
+    bit[0]: polarity (0 for normal and 1 for inverted)
+    bit[18:16]: internal pull up/down: 0 - pull up/down disabled
+                                       1 - pull up enabled
+                                       2 - pull down enabled
+    bit[22:20]: drive strength: 0 - 2 mA
+                                1 - 4 mA
+                                2 - 6 mA
+                                3 - 8 mA
+                                4 - 10 mA
+                                5 - 12 mA
+                                6 - 14 mA
+                                7 - 16 mA
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller. Not all Cygnus GPIO
+interfaces support interrupt, e.g., the CRMU GPIO controller does not have its
+interrupt routed to the main processor's GIC
+
+- interrupts:
+    The interrupt outputs from the GPIO controller.
+
+- no-drv-strength:
+    Specifies the GPIO controller does not support drive strength configuration
+
+Example:
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-drv-strength;
+	};
+
+	/*
+	 * Touchscreen that uses the ASIU GPIO 100, with internal pull-up
+	 * enabled
+	 */
+	tsc {
+		...
+		...
+		gpio-event = <&gpio_asiu 100 0x10000>;
+	};
+
+	/* Bluetooth that uses the CRMU GPIO 2, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_crmu 2 1>
+	}
-- 
1.7.9.5

[PATCH v4 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller, 2) the
chipCommonG GPIO controller, and 3) the ALWAYS-ON GPIO controller

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/gpio/Kconfig           |   11 +
 drivers/gpio/Makefile          |    1 +
 drivers/gpio/gpio-bcm-cygnus.c |  705 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 717 insertions(+)
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 633ec21..3e3b0342 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -126,6 +126,17 @@ config GPIO_74XX_MMIO
 	    8 bits:	74244 (Input), 74273 (Output)
 	    16 bits:	741624 (Input), 7416374 (Output)
 
+config GPIO_BCM_CYGNUS
+	bool "Broadcom Cygnus GPIO support"
+	depends on ARCH_BCM_CYGNUS && OF_GPIO
+	help
+	  Say yes here to turn on GPIO support for Broadcom Cygnus SoC
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU). All 3 GPIO controllers are
+	  supported by this driver
+
 config GPIO_CLPS711X
 	tristate "CLPS711X GPIO support"
 	depends on ARCH_CLPS711X || COMPILE_TEST
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 81755f1..31eb7e0 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5520)	+= gpio-adp5520.o
 obj-$(CONFIG_GPIO_ADP5588)	+= gpio-adp5588.o
 obj-$(CONFIG_GPIO_AMD8111)	+= gpio-amd8111.o
 obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizona.o
+obj-$(CONFIG_GPIO_BCM_CYGNUS)	+= gpio-bcm-cygnus.o
 obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
 obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
 obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
new file mode 100644
index 0000000..4fd9b73
--- /dev/null
+++ b/drivers/gpio/gpio-bcm-cygnus.c
@@ -0,0 +1,705 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/irqchip/chained_irq.h>
+
+#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
+#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
+#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
+#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
+#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
+#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
+#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
+#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
+#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
+#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
+#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
+#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
+
+/* drive strength control for ASIU GPIO */
+#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+
+/* drive strength control for CCM GPIO */
+#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
+
+#define GPIO_BANK_SIZE 0x200
+#define NGPIOS_PER_BANK 32
+#define GPIO_BIT(pin) ((pin) % NGPIOS_PER_BANK)
+#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
+
+#define GPIO_FLAG_BIT_MASK           0xffff
+#define GPIO_PULL_BIT_SHIFT          16
+#define GPIO_PULL_BIT_MASK           0x3
+
+#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
+#define GPIO_DRV_STRENGTH_BITS       3
+#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
+
+/*
+ * For GPIO internal pull up/down registers
+ */
+enum gpio_pull {
+	GPIO_PULL_NONE = 0,
+	GPIO_PULL_UP,
+	GPIO_PULL_DOWN,
+	GPIO_PULL_INVALID,
+};
+
+/*
+ * GPIO drive strength
+ */
+enum gpio_drv_strength {
+	GPIO_DRV_STRENGTH_2MA = 0,
+	GPIO_DRV_STRENGTH_4MA,
+	GPIO_DRV_STRENGTH_6MA,
+	GPIO_DRV_STRENGTH_8MA,
+	GPIO_DRV_STRENGTH_10MA,
+	GPIO_DRV_STRENGTH_12MA,
+	GPIO_DRV_STRENGTH_14MA,
+	GPIO_DRV_STRENGTH_16MA,
+	GPIO_DRV_STRENGTH_INVALID,
+};
+
+struct bcm_cygnus_gpio {
+	struct device *dev;
+	void __iomem *base;
+	void __iomem *io_ctrl;
+	spinlock_t lock;
+	struct gpio_chip gc;
+	unsigned num_banks;
+	int irq;
+	struct irq_domain *irq_domain;
+};
+
+static unsigned int gpio_base_index;
+
+static struct bcm_cygnus_gpio *to_bcm_cygnus_gpio(struct gpio_chip *gc)
+{
+	return container_of(gc, struct bcm_cygnus_gpio, gc);
+}
+
+static int bcm_cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+
+	return irq_find_mapping(cygnus_gpio->irq_domain, offset);
+}
+
+static unsigned int __gpio_reg_offset(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio)
+{
+	return GPIO_BANK(gpio) * GPIO_BANK_SIZE;
+}
+
+static unsigned int __gpio_bitpos(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio)
+{
+	return GPIO_BIT(gpio);
+}
+
+static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
+		struct irq_desc *desc)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio;
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int i, bit;
+
+	chained_irq_enter(chip, desc);
+
+	cygnus_gpio = irq_get_handler_data(irq);
+
+	/* go through the entire GPIO banks and handle all interrupts */
+	for (i = 0; i < cygnus_gpio->num_banks; i++) {
+		unsigned long val = readl(cygnus_gpio->base +
+				(i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_MSTAT_OFFSET);
+
+		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
+			unsigned pin = NGPIOS_PER_BANK * i + bit;
+			int child_irq =
+				bcm_cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
+
+			/*
+			 * Clear the interrupt before invoking the
+			 * handler, so we do not leave any window
+			 */
+			writel(1 << bit,
+				cygnus_gpio->base + (i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_CLR_OFFSET);
+
+			generic_handle_irq(child_irq);
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static void bcm_cygnus_gpio_irq_ack(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_CLR_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static void bcm_cygnus_gpio_irq_mask(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_MSK_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static void bcm_cygnus_gpio_irq_unmask(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_MSK_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static int bcm_cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int int_type, dual_edge, edge_lvl;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		int_type = 0;
+		dual_edge = 0;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		int_type = 0;
+		dual_edge = 0;
+		edge_lvl = 0;
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		int_type = 0;
+		dual_edge = 1;
+		edge_lvl = 0;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		int_type = 1;
+		dual_edge = 0;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		int_type = 1;
+		dual_edge = 0;
+		edge_lvl = 0;
+		break;
+
+	default:
+		dev_err(cygnus_gpio->dev, "invalid GPIO irq type 0x%x\n", type);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_IN_TYPE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= int_type << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_DE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= dual_edge << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_EDGE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= edge_lvl << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	return 0;
+}
+
+static struct irq_chip bcm_cygnus_gpio_irq_chip = {
+	.name = "bcm-cygnus-gpio",
+	.irq_ack = bcm_cygnus_gpio_irq_ack,
+	.irq_mask = bcm_cygnus_gpio_irq_mask,
+	.irq_unmask = bcm_cygnus_gpio_irq_unmask,
+	.irq_set_type = bcm_cygnus_gpio_irq_set_type,
+};
+
+static int bcm_cygnus_gpio_direction_input(struct gpio_chip *gc,
+		unsigned gpio)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_OUT_EN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+
+	return 0;
+}
+
+static int bcm_cygnus_gpio_direction_output(struct gpio_chip *gc,
+		unsigned gpio, int value)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_OUT_EN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_OUT_OFFSET;
+
+	val = readl(cygnus_gpio->base + offset);
+	if (value)
+		val |= 1 << shift;
+	else
+		val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
+		gpio, offset, shift, val);
+
+	return 0;
+}
+
+static void bcm_cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio,
+		int value)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_OUT_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	if (value)
+		val |= 1 << shift;
+	else
+		val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
+		gpio, offset, shift, val);
+}
+
+static int bcm_cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_IN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = readl(cygnus_gpio->base + offset);
+	val = (val >> shift) & 1;
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u val:%u\n",
+			gpio, offset, shift, val);
+
+	return val;
+}
+
+static struct lock_class_key gpio_lock_class;
+
+static int bcm_cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+				 irq_hw_number_t hwirq)
+{
+	int ret;
+
+	ret = irq_set_chip_data(irq, d->host_data);
+	if (ret < 0)
+		return ret;
+	irq_set_lockdep_class(irq, &gpio_lock_class);
+	irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
+			handle_simple_irq);
+	set_irq_flags(irq, IRQF_VALID);
+
+	return 0;
+}
+
+static void bcm_cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static struct irq_domain_ops bcm_cygnus_irq_ops = {
+	.map = bcm_cygnus_gpio_irq_map,
+	.unmap = bcm_cygnus_gpio_irq_unmap,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+#ifdef CONFIG_OF_GPIO
+static void bcm_cygnus_gpio_set_pull(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_pull pull)
+{
+	unsigned int offset, shift;
+	u32 val, pullup;
+	unsigned long flags;
+
+	switch (pull) {
+	case GPIO_PULL_UP:
+		pullup = 1;
+		break;
+	case GPIO_PULL_DOWN:
+		pullup = 0;
+		break;
+	case GPIO_PULL_NONE:
+	case GPIO_PULL_INVALID:
+	default:
+		return;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	/* set pull up/down */
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_PAD_RES_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	if (pullup)
+		val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	/* enable pad */
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_RES_EN_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static void bcm_cygnus_gpio_set_strength(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_drv_strength strength)
+{
+	struct device *dev = cygnus_gpio->dev;
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	/* some GPIO controllers do not support drive strength configuration */
+	if (of_find_property(dev->of_node, "no-drv-strength", NULL))
+		return;
+
+	if (cygnus_gpio->io_ctrl) {
+		base = cygnus_gpio->io_ctrl;
+		offset = CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET;
+	} else {
+		base = cygnus_gpio->base;
+		offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+			CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET;
+	}
+
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset);
+		val &= ~(1 << shift);
+		val |= ((strength >> i) & 0x1) << shift;
+		writel(val, base + offset);
+		offset += 4;
+	}
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static int bcm_cygnus_gpio_of_xlate(struct gpio_chip *gc,
+		const struct of_phandle_args *gpiospec, u32 *flags)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	enum gpio_pull pull;
+	enum gpio_drv_strength strength;
+
+	if (gc->of_gpio_n_cells < 2)
+		return -EINVAL;
+
+	if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+		return -EINVAL;
+
+	if (gpiospec->args[0] >= gc->ngpio)
+		return -EINVAL;
+
+	pull = (gpiospec->args[1] >> GPIO_PULL_BIT_SHIFT) & GPIO_PULL_BIT_MASK;
+	if (WARN_ON(pull >= GPIO_PULL_INVALID))
+		return -EINVAL;
+
+	strength = (gpiospec->args[1] >> GPIO_DRV_STRENGTH_BIT_SHIFT) &
+		GPIO_DRV_STRENGTH_BIT_MASK;
+
+	if (flags)
+		*flags = gpiospec->args[1] & GPIO_FLAG_BIT_MASK;
+
+	bcm_cygnus_gpio_set_pull(cygnus_gpio, gpiospec->args[0], pull);
+	bcm_cygnus_gpio_set_strength(cygnus_gpio, gpiospec->args[0], strength);
+
+	return gpiospec->args[0];
+}
+#endif
+
+static const struct of_device_id bcm_cygnus_gpio_of_match[] = {
+	{ .compatible = "brcm,cygnus-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bcm_cygnus_gpio_of_match);
+
+static int bcm_cygnus_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *match;
+	struct resource *res;
+	struct bcm_cygnus_gpio *cygnus_gpio;
+	struct gpio_chip *gc;
+	u32 i, ngpios;
+	int ret;
+
+	match = of_match_device(bcm_cygnus_gpio_of_match, dev);
+	if (!match) {
+		dev_err(&pdev->dev, "failed to find GPIO controller\n");
+		return -ENODEV;
+	}
+
+	cygnus_gpio = devm_kzalloc(dev, sizeof(*cygnus_gpio), GFP_KERNEL);
+	if (!cygnus_gpio)
+		return -ENOMEM;
+
+	cygnus_gpio->dev = dev;
+	platform_set_drvdata(pdev, cygnus_gpio);
+
+	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+		dev_err(&pdev->dev, "missing ngpios device tree property\n");
+		return -ENODEV;
+	}
+	cygnus_gpio->num_banks = (ngpios + NGPIOS_PER_BANK - 1) /
+		NGPIOS_PER_BANK;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "unable to get I/O resource\n");
+		return -ENODEV;
+	}
+
+	cygnus_gpio->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(cygnus_gpio->base)) {
+		dev_err(&pdev->dev, "unable to map I/O memory\n");
+		return PTR_ERR(cygnus_gpio->base);
+	}
+
+	/*
+	 * Only certain types of Cygnus GPIO interfaces have I/O control
+	 * registers
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		cygnus_gpio->io_ctrl = devm_ioremap_resource(dev, res);
+		if (IS_ERR(cygnus_gpio->io_ctrl)) {
+			dev_err(&pdev->dev, "unable to map I/O memory\n");
+			return PTR_ERR(cygnus_gpio->io_ctrl);
+		}
+	}
+
+	spin_lock_init(&cygnus_gpio->lock);
+
+	gc = &cygnus_gpio->gc;
+	gc->base = gpio_base_index;
+	gpio_base_index += ngpios;
+	gc->ngpio = ngpios;
+	gc->label = dev_name(dev);
+	gc->dev = dev;
+#ifdef CONFIG_OF_GPIO
+	gc->of_node = dev->of_node;
+	gc->of_gpio_n_cells = 2;
+	gc->of_xlate = bcm_cygnus_gpio_of_xlate;
+#endif
+	gc->direction_input = bcm_cygnus_gpio_direction_input;
+	gc->direction_output = bcm_cygnus_gpio_direction_output;
+	gc->set = bcm_cygnus_gpio_set;
+	gc->get = bcm_cygnus_gpio_get;
+	gc->to_irq = bcm_cygnus_gpio_to_irq;
+
+	ret = gpiochip_add(gc);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "unable to add GPIO chip\n");
+		goto err_dec_gpio_base;
+	}
+
+	/*
+	 * Some of the GPIO interfaces do not have interrupt wired to the main
+	 * processor
+	 */
+	cygnus_gpio->irq = platform_get_irq(pdev, 0);
+	if (cygnus_gpio->irq < 0) {
+		ret = cygnus_gpio->irq;
+		if (ret == -EPROBE_DEFER)
+			goto err_rm_gpiochip;
+
+		dev_info(&pdev->dev, "no interrupt hook\n");
+	}
+
+	cygnus_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
+			gc->ngpio, &bcm_cygnus_irq_ops, cygnus_gpio);
+	if (!cygnus_gpio->irq_domain) {
+		dev_err(&pdev->dev, "unable to allocate IRQ domain\n");
+		ret = -ENXIO;
+		goto err_rm_gpiochip;
+	}
+
+	for (i = 0; i < gc->ngpio; i++) {
+		int irq = irq_create_mapping(cygnus_gpio->irq_domain, i);
+
+		irq_set_lockdep_class(irq, &gpio_lock_class);
+		irq_set_chip_data(irq, cygnus_gpio);
+		irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
+				handle_simple_irq);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	irq_set_chained_handler(cygnus_gpio->irq, bcm_cygnus_gpio_irq_handler);
+	irq_set_handler_data(cygnus_gpio->irq, cygnus_gpio);
+
+	return 0;
+
+err_rm_gpiochip:
+	gpiochip_remove(gc);
+
+err_dec_gpio_base:
+	gpio_base_index -= ngpios;
+	return ret;
+}
+
+static struct platform_driver bcm_cygnus_gpio_driver = {
+	.driver = {
+		.name = "bcm-cygnus-gpio",
+		.owner = THIS_MODULE,
+		.of_match_table = bcm_cygnus_gpio_of_match,
+	},
+	.probe = bcm_cygnus_gpio_probe,
+};
+
+module_platform_driver(bcm_cygnus_gpio_driver);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

Re: [PATCH v4 2/5] gpio: Cygnus: add GPIO driver

[Alexandre Courbot]

On Tue, Dec 9, 2014 at 5:41 AM, Ray Jui <rjui@broadcom.com> wrote:
> This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
> SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller, 2) the
> chipCommonG GPIO controller, and 3) the ALWAYS-ON GPIO controller
>
> Signed-off-by: Ray Jui <rjui@broadcom.com>
> Reviewed-by: Scott Branden <sbranden@broadcom.com>
> ---
>  drivers/gpio/Kconfig           |   11 +
>  drivers/gpio/Makefile          |    1 +
>  drivers/gpio/gpio-bcm-cygnus.c |  705 ++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 717 insertions(+)
>  create mode 100644 drivers/gpio/gpio-bcm-cygnus.c
>
> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
> index 633ec21..3e3b0342 100644
> --- a/drivers/gpio/Kconfig
> +++ b/drivers/gpio/Kconfig
> @@ -126,6 +126,17 @@ config GPIO_74XX_MMIO
>             8 bits:     74244 (Input), 74273 (Output)
>             16 bits:    741624 (Input), 7416374 (Output)
>
> +config GPIO_BCM_CYGNUS
> +       bool "Broadcom Cygnus GPIO support"
> +       depends on ARCH_BCM_CYGNUS && OF_GPIO
> +       help
> +         Say yes here to turn on GPIO support for Broadcom Cygnus SoC
> +
> +         The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
> +         GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
> +         the always-ON GPIO controller (CRMU). All 3 GPIO controllers are
> +         supported by this driver
> +
>  config GPIO_CLPS711X
>         tristate "CLPS711X GPIO support"
>         depends on ARCH_CLPS711X || COMPILE_TEST
> diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
> index 81755f1..31eb7e0 100644
> --- a/drivers/gpio/Makefile
> +++ b/drivers/gpio/Makefile
> @@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5520)    += gpio-adp5520.o
>  obj-$(CONFIG_GPIO_ADP5588)     += gpio-adp5588.o
>  obj-$(CONFIG_GPIO_AMD8111)     += gpio-amd8111.o
>  obj-$(CONFIG_GPIO_ARIZONA)     += gpio-arizona.o
> +obj-$(CONFIG_GPIO_BCM_CYGNUS)  += gpio-bcm-cygnus.o
>  obj-$(CONFIG_GPIO_BCM_KONA)    += gpio-bcm-kona.o
>  obj-$(CONFIG_GPIO_BT8XX)       += gpio-bt8xx.o
>  obj-$(CONFIG_GPIO_CLPS711X)    += gpio-clps711x.o
> diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
> new file mode 100644
> index 0000000..4fd9b73
> --- /dev/null
> +++ b/drivers/gpio/gpio-bcm-cygnus.c
> @@ -0,0 +1,705 @@
> +/*
> + * Copyright (C) 2014 Broadcom Corporation
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +#include <linux/module.h>
> +#include <linux/irq.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/gpio.h>
> +#include <linux/ioport.h>
> +#include <linux/of_device.h>
> +#include <linux/of_irq.h>
> +#include <linux/irqchip/chained_irq.h>
> +
> +#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
> +#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
> +#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
> +#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
> +#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
> +#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
> +#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
> +#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
> +#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
> +#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
> +#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
> +#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
> +
> +/* drive strength control for ASIU GPIO */
> +#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
> +
> +/* drive strength control for CCM GPIO */
> +#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
> +
> +#define GPIO_BANK_SIZE 0x200
> +#define NGPIOS_PER_BANK 32
> +#define GPIO_BIT(pin) ((pin) % NGPIOS_PER_BANK)
> +#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
> +
> +#define GPIO_FLAG_BIT_MASK           0xffff
> +#define GPIO_PULL_BIT_SHIFT          16
> +#define GPIO_PULL_BIT_MASK           0x3
> +
> +#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
> +#define GPIO_DRV_STRENGTH_BITS       3
> +#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
> +
> +/*
> + * For GPIO internal pull up/down registers
> + */
> +enum gpio_pull {
> +       GPIO_PULL_NONE = 0,
> +       GPIO_PULL_UP,
> +       GPIO_PULL_DOWN,
> +       GPIO_PULL_INVALID,
> +};
> +
> +/*
> + * GPIO drive strength
> + */
> +enum gpio_drv_strength {
> +       GPIO_DRV_STRENGTH_2MA = 0,
> +       GPIO_DRV_STRENGTH_4MA,
> +       GPIO_DRV_STRENGTH_6MA,
> +       GPIO_DRV_STRENGTH_8MA,
> +       GPIO_DRV_STRENGTH_10MA,
> +       GPIO_DRV_STRENGTH_12MA,
> +       GPIO_DRV_STRENGTH_14MA,
> +       GPIO_DRV_STRENGTH_16MA,
> +       GPIO_DRV_STRENGTH_INVALID,
> +};
> +
> +struct bcm_cygnus_gpio {
> +       struct device *dev;
> +       void __iomem *base;
> +       void __iomem *io_ctrl;
> +       spinlock_t lock;
> +       struct gpio_chip gc;
> +       unsigned num_banks;
> +       int irq;
> +       struct irq_domain *irq_domain;
> +};
> +
> +static unsigned int gpio_base_index;

Nope. What happens if there are other GPIO controllers with
conflicting base GPIOs? I guess this adds more weight to that
"linux,gpio-base" property I mentioned in
http://www.spinics.net/lists/arm-kernel/msg384847.html .

The best solution would be for users of the GPIOs provided by this
driver to not rely on GPIO numbers at all, and exclusively use the
gpiod interface. Is that an option for you?

> +
> +static struct bcm_cygnus_gpio *to_bcm_cygnus_gpio(struct gpio_chip *gc)
> +{
> +       return container_of(gc, struct bcm_cygnus_gpio, gc);
> +}
> +
> +static int bcm_cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
> +
> +       return irq_find_mapping(cygnus_gpio->irq_domain, offset);
> +}
> +
> +static unsigned int __gpio_reg_offset(struct bcm_cygnus_gpio *cygnus_gpio,
> +               unsigned gpio)
> +{
> +       return GPIO_BANK(gpio) * GPIO_BANK_SIZE;
> +}

The cygnus_gpio argument in this function is unused. The compiler is
supposed to signal such issues. Have you looked at your compiler
output?

> +
> +static unsigned int __gpio_bitpos(struct bcm_cygnus_gpio *cygnus_gpio,
> +               unsigned gpio)
> +{
> +       return GPIO_BIT(gpio);
> +}

Same here. Also they are so simple that macros would be more adequate
here I believe:

#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + reg)
#define CYGNUS_GPIO_SHIFT(pin) (pin % NGPIOS_PER_BANK) /* and remove
the GPIO_BIT macro */

> +
> +static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
> +               struct irq_desc *desc)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio;
> +       struct irq_chip *chip = irq_desc_get_chip(desc);
> +       int i, bit;
> +
> +       chained_irq_enter(chip, desc);
> +
> +       cygnus_gpio = irq_get_handler_data(irq);
> +
> +       /* go through the entire GPIO banks and handle all interrupts */
> +       for (i = 0; i < cygnus_gpio->num_banks; i++) {
> +               unsigned long val = readl(cygnus_gpio->base +
> +                               (i * GPIO_BANK_SIZE) +
> +                               CYGNUS_GPIO_INT_MSTAT_OFFSET);

Can you add cygnus_readl() and cygnus_writel() functions to avoid
explicitly doing this operation on cygnus_gpio->base every time? It
would be clearer and less error-prone.

> +
> +               for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
> +                       unsigned pin = NGPIOS_PER_BANK * i + bit;
> +                       int child_irq =
> +                               bcm_cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
> +
> +                       /*
> +                        * Clear the interrupt before invoking the
> +                        * handler, so we do not leave any window
> +                        */
> +                       writel(1 << bit,
> +                               cygnus_gpio->base + (i * GPIO_BANK_SIZE) +
> +                               CYGNUS_GPIO_INT_CLR_OFFSET);
> +
> +                       generic_handle_irq(child_irq);
> +               }
> +       }
> +
> +       chained_irq_exit(chip, desc);
> +}
> +
> +static void bcm_cygnus_gpio_irq_ack(struct irq_data *d)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
> +       unsigned gpio = d->hwirq;
> +       unsigned int offset, shift;
> +       u32 val;
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_INT_CLR_OFFSET;
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       val = 1 << shift;

val = BIT(shift);

> +       writel(val, cygnus_gpio->base + offset);
> +
> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
> +                       offset, shift);
> +}
> +
> +static void bcm_cygnus_gpio_irq_mask(struct irq_data *d)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
> +       unsigned gpio = d->hwirq;
> +       unsigned int offset, shift;
> +       u32 val;
> +       unsigned long flags;
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_INT_MSK_OFFSET;
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
> +
> +       val = readl(cygnus_gpio->base + offset);
> +       val &= ~(1 << shift);

val &= ~BIT(shift);

> +       writel(val, cygnus_gpio->base + offset);
> +
> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
> +
> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
> +                       offset, shift);
> +}
> +
> +static void bcm_cygnus_gpio_irq_unmask(struct irq_data *d)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
> +       unsigned gpio = d->hwirq;
> +       unsigned int offset, shift;
> +       u32 val;
> +       unsigned long flags;
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_INT_MSK_OFFSET;
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
> +
> +       val = readl(cygnus_gpio->base + offset);
> +       val |= 1 << shift;

val |= BIT(shift);

Same remark everywhere it applies in this file.

> +       writel(val, cygnus_gpio->base + offset);
> +
> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
> +
> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
> +                       offset, shift);
> +}

It seems like you can factorize bcm_cygnus_gpio_irq_mask() and
bcm_cygnus_gpio_irq_unmask() into one function which prototype would
be, say:

static void bcm_cygnus_gpio_irq_set_mask(struct irq_data *d, int mask);

which would set of clear the bit according to the value of mask. Then
your two mask/unmask functions would just need to call this one,
reducing the amount of redundant code.

Also I noticed that this driver has lots of readl()/twiddle
bit/writel() sequences. Maybe it would make sense to have a
cygnus_set_bit(chip, reg, gpio, set) function to factorize this:

void cygnus_set_bit(chip, reg, gpio, set)
{
    unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
    unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
    u32 val;

    val = cygnus_readl(chip, offset);
    if (set)
        val |= BIT(shift);
    else
        val &= ~BIT(shift);
    cygnus_writel(chip, offset, val);
}

> +
> +static int bcm_cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
> +       unsigned gpio = d->hwirq;
> +       unsigned int int_type, dual_edge, edge_lvl;
> +       unsigned int offset, shift;
> +       u32 val;
> +       unsigned long flags;
> +
> +       switch (type & IRQ_TYPE_SENSE_MASK) {
> +       case IRQ_TYPE_EDGE_RISING:
> +               int_type = 0;
> +               dual_edge = 0;
> +               edge_lvl = 1;
> +               break;
> +
> +       case IRQ_TYPE_EDGE_FALLING:
> +               int_type = 0;
> +               dual_edge = 0;
> +               edge_lvl = 0;
> +               break;
> +
> +       case IRQ_TYPE_EDGE_BOTH:
> +               int_type = 0;
> +               dual_edge = 1;
> +               edge_lvl = 0;
> +               break;
> +
> +       case IRQ_TYPE_LEVEL_HIGH:
> +               int_type = 1;
> +               dual_edge = 0;
> +               edge_lvl = 1;
> +               break;
> +
> +       case IRQ_TYPE_LEVEL_LOW:
> +               int_type = 1;
> +               dual_edge = 0;
> +               edge_lvl = 0;
> +               break;
> +
> +       default:
> +               dev_err(cygnus_gpio->dev, "invalid GPIO irq type 0x%x\n", type);
> +               return -EINVAL;
> +       }
> +
> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
> +
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_IN_TYPE_OFFSET;
> +       val = readl(cygnus_gpio->base + offset);
> +       val &= ~(1 << shift);
> +       val |= int_type << shift;
> +       writel(val, cygnus_gpio->base + offset);
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_INT_DE_OFFSET;
> +       val = readl(cygnus_gpio->base + offset);
> +       val &= ~(1 << shift);
> +       val |= dual_edge << shift;
> +       writel(val, cygnus_gpio->base + offset);
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_INT_EDGE_OFFSET;
> +       val = readl(cygnus_gpio->base + offset);
> +       val &= ~(1 << shift);
> +       val |= edge_lvl << shift;
> +       writel(val, cygnus_gpio->base + offset);

With the functions/macros suggested above I think you could change the
3 blocks above into something like:

cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_IN_TYPE_OFFSET, gpio, int_type);
cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_DE_OFFSET, gpio, dual_edge);
cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio, edge_lvl);

> +
> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
> +
> +       return 0;
> +}
> +
> +static struct irq_chip bcm_cygnus_gpio_irq_chip = {
> +       .name = "bcm-cygnus-gpio",
> +       .irq_ack = bcm_cygnus_gpio_irq_ack,
> +       .irq_mask = bcm_cygnus_gpio_irq_mask,
> +       .irq_unmask = bcm_cygnus_gpio_irq_unmask,
> +       .irq_set_type = bcm_cygnus_gpio_irq_set_type,
> +};
> +
> +static int bcm_cygnus_gpio_direction_input(struct gpio_chip *gc,
> +               unsigned gpio)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
> +       unsigned int offset, shift;
> +       u32 val;
> +       unsigned long flags;
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_OUT_EN_OFFSET;
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
> +
> +       val = readl(cygnus_gpio->base + offset);
> +       val &= ~(1 << shift);
> +       writel(val, cygnus_gpio->base + offset);
> +
> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
> +
> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
> +                       offset, shift);
> +
> +       return 0;
> +}
> +
> +static int bcm_cygnus_gpio_direction_output(struct gpio_chip *gc,
> +               unsigned gpio, int value)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
> +       unsigned int offset, shift;
> +       u32 val;
> +       unsigned long flags;
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_OUT_EN_OFFSET;
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
> +
> +       val = readl(cygnus_gpio->base + offset);
> +       val |= 1 << shift;
> +       writel(val, cygnus_gpio->base + offset);
> +
> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
> +                       offset, shift);
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_DATA_OUT_OFFSET;
> +
> +       val = readl(cygnus_gpio->base + offset);
> +       if (value)
> +               val |= 1 << shift;
> +       else
> +               val &= ~(1 << shift);
> +       writel(val, cygnus_gpio->base + offset);

And here you would have:

cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 1);
cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);

Many other sites in this file could be simplified this way.

> +
> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
> +
> +       dev_dbg(cygnus_gpio->dev,
> +               "gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
> +               gpio, offset, shift, val);
> +
> +       return 0;
> +}
> +
> +static void bcm_cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio,
> +               int value)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
> +       unsigned int offset, shift;
> +       u32 val;
> +       unsigned long flags;
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_DATA_OUT_OFFSET;
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
> +
> +       val = readl(cygnus_gpio->base + offset);
> +       if (value)
> +               val |= 1 << shift;
> +       else
> +               val &= ~(1 << shift);
> +       writel(val, cygnus_gpio->base + offset);
> +
> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
> +
> +       dev_dbg(cygnus_gpio->dev,
> +               "gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
> +               gpio, offset, shift, val);
> +}
> +
> +static int bcm_cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
> +       unsigned int offset, shift;
> +       u32 val;
> +
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_DATA_IN_OFFSET;
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       val = readl(cygnus_gpio->base + offset);
> +       val = (val >> shift) & 1;
> +
> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u val:%u\n",
> +                       gpio, offset, shift, val);
> +
> +       return val;
> +}
> +
> +static struct lock_class_key gpio_lock_class;
> +
> +static int bcm_cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
> +                                irq_hw_number_t hwirq)
> +{
> +       int ret;
> +
> +       ret = irq_set_chip_data(irq, d->host_data);
> +       if (ret < 0)
> +               return ret;
> +       irq_set_lockdep_class(irq, &gpio_lock_class);
> +       irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
> +                       handle_simple_irq);
> +       set_irq_flags(irq, IRQF_VALID);
> +
> +       return 0;
> +}
> +
> +static void bcm_cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
> +{
> +       irq_set_chip_and_handler(irq, NULL, NULL);
> +       irq_set_chip_data(irq, NULL);
> +}
> +
> +static struct irq_domain_ops bcm_cygnus_irq_ops = {
> +       .map = bcm_cygnus_gpio_irq_map,
> +       .unmap = bcm_cygnus_gpio_irq_unmap,
> +       .xlate = irq_domain_xlate_twocell,
> +};
> +
> +#ifdef CONFIG_OF_GPIO
> +static void bcm_cygnus_gpio_set_pull(struct bcm_cygnus_gpio *cygnus_gpio,
> +               unsigned gpio, enum gpio_pull pull)
> +{
> +       unsigned int offset, shift;
> +       u32 val, pullup;
> +       unsigned long flags;
> +
> +       switch (pull) {
> +       case GPIO_PULL_UP:
> +               pullup = 1;
> +               break;
> +       case GPIO_PULL_DOWN:
> +               pullup = 0;
> +               break;
> +       case GPIO_PULL_NONE:
> +       case GPIO_PULL_INVALID:
> +       default:
> +               return;
> +       }
> +
> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
> +
> +       /* set pull up/down */
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_PAD_RES_OFFSET;
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       val = readl(cygnus_gpio->base + offset);
> +       val &= ~(1 << shift);
> +       if (pullup)
> +               val |= 1 << shift;
> +       writel(val, cygnus_gpio->base + offset);
> +
> +       /* enable pad */
> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +               CYGNUS_GPIO_RES_EN_OFFSET;
> +       val = readl(cygnus_gpio->base + offset);
> +       val |= 1 << shift;
> +       writel(val, cygnus_gpio->base + offset);
> +
> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
> +}
> +
> +static void bcm_cygnus_gpio_set_strength(struct bcm_cygnus_gpio *cygnus_gpio,
> +               unsigned gpio, enum gpio_drv_strength strength)
> +{
> +       struct device *dev = cygnus_gpio->dev;
> +       void __iomem *base;
> +       unsigned int i, offset, shift;
> +       u32 val;
> +       unsigned long flags;
> +
> +       /* some GPIO controllers do not support drive strength configuration */
> +       if (of_find_property(dev->of_node, "no-drv-strength", NULL))
> +               return;
> +
> +       if (cygnus_gpio->io_ctrl) {
> +               base = cygnus_gpio->io_ctrl;
> +               offset = CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET;
> +       } else {
> +               base = cygnus_gpio->base;
> +               offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +                       CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET;
> +       }
> +
> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
> +
> +       for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
> +               val = readl(base + offset);
> +               val &= ~(1 << shift);
> +               val |= ((strength >> i) & 0x1) << shift;
> +               writel(val, base + offset);
> +               offset += 4;
> +       }
> +
> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
> +}
> +
> +static int bcm_cygnus_gpio_of_xlate(struct gpio_chip *gc,
> +               const struct of_phandle_args *gpiospec, u32 *flags)
> +{
> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
> +       enum gpio_pull pull;
> +       enum gpio_drv_strength strength;
> +
> +       if (gc->of_gpio_n_cells < 2)
> +               return -EINVAL;
> +
> +       if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
> +               return -EINVAL;
> +
> +       if (gpiospec->args[0] >= gc->ngpio)
> +               return -EINVAL;
> +
> +       pull = (gpiospec->args[1] >> GPIO_PULL_BIT_SHIFT) & GPIO_PULL_BIT_MASK;
> +       if (WARN_ON(pull >= GPIO_PULL_INVALID))
> +               return -EINVAL;
> +
> +       strength = (gpiospec->args[1] >> GPIO_DRV_STRENGTH_BIT_SHIFT) &
> +               GPIO_DRV_STRENGTH_BIT_MASK;
> +
> +       if (flags)
> +               *flags = gpiospec->args[1] & GPIO_FLAG_BIT_MASK;
> +
> +       bcm_cygnus_gpio_set_pull(cygnus_gpio, gpiospec->args[0], pull);
> +       bcm_cygnus_gpio_set_strength(cygnus_gpio, gpiospec->args[0], strength);
> +
> +       return gpiospec->args[0];
> +}
> +#endif
> +
> +static const struct of_device_id bcm_cygnus_gpio_of_match[] = {
> +       { .compatible = "brcm,cygnus-gpio" },
> +       { }
> +};
> +MODULE_DEVICE_TABLE(of, bcm_cygnus_gpio_of_match);
> +
> +static int bcm_cygnus_gpio_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       const struct of_device_id *match;
> +       struct resource *res;
> +       struct bcm_cygnus_gpio *cygnus_gpio;
> +       struct gpio_chip *gc;
> +       u32 i, ngpios;
> +       int ret;
> +
> +       match = of_match_device(bcm_cygnus_gpio_of_match, dev);
> +       if (!match) {
> +               dev_err(&pdev->dev, "failed to find GPIO controller\n");
> +               return -ENODEV;
> +       }

Do you still need that block of code? match is never used in this function.

... well, I think you get the drill. Let's first start by factorizing
as much code as can be to make this driver easier to read (I have a
few leads, but I am sure there are other similar factorizations that
can be made). Let's also get rid of this static gpio_base_index
variable that effectively prevents any other GPIO driver from being
used alongside with this one. If you really need to use global GPIO
numbers, let's see if Linus agrees for that "linux,gpio-base" DT
property that would certainly make many people happy.

Re: [PATCH v4 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

On 12/10/2014 2:34 AM, Alexandre Courbot wrote:
> On Tue, Dec 9, 2014 at 5:41 AM, Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org> wrote:
>> This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
>> SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller, 2) the
>> chipCommonG GPIO controller, and 3) the ALWAYS-ON GPIO controller
>>
>> Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
>> Reviewed-by: Scott Branden <sbranden-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
>> ---
>>   drivers/gpio/Kconfig           |   11 +
>>   drivers/gpio/Makefile          |    1 +
>>   drivers/gpio/gpio-bcm-cygnus.c |  705 ++++++++++++++++++++++++++++++++++++++++
>>   3 files changed, 717 insertions(+)
>>   create mode 100644 drivers/gpio/gpio-bcm-cygnus.c
>>
>> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
>> index 633ec21..3e3b0342 100644
>> --- a/drivers/gpio/Kconfig
>> +++ b/drivers/gpio/Kconfig
>> @@ -126,6 +126,17 @@ config GPIO_74XX_MMIO
>>              8 bits:     74244 (Input), 74273 (Output)
>>              16 bits:    741624 (Input), 7416374 (Output)
>>
>> +config GPIO_BCM_CYGNUS
>> +       bool "Broadcom Cygnus GPIO support"
>> +       depends on ARCH_BCM_CYGNUS && OF_GPIO
>> +       help
>> +         Say yes here to turn on GPIO support for Broadcom Cygnus SoC
>> +
>> +         The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
>> +         GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
>> +         the always-ON GPIO controller (CRMU). All 3 GPIO controllers are
>> +         supported by this driver
>> +
>>   config GPIO_CLPS711X
>>          tristate "CLPS711X GPIO support"
>>          depends on ARCH_CLPS711X || COMPILE_TEST
>> diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
>> index 81755f1..31eb7e0 100644
>> --- a/drivers/gpio/Makefile
>> +++ b/drivers/gpio/Makefile
>> @@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5520)    += gpio-adp5520.o
>>   obj-$(CONFIG_GPIO_ADP5588)     += gpio-adp5588.o
>>   obj-$(CONFIG_GPIO_AMD8111)     += gpio-amd8111.o
>>   obj-$(CONFIG_GPIO_ARIZONA)     += gpio-arizona.o
>> +obj-$(CONFIG_GPIO_BCM_CYGNUS)  += gpio-bcm-cygnus.o
>>   obj-$(CONFIG_GPIO_BCM_KONA)    += gpio-bcm-kona.o
>>   obj-$(CONFIG_GPIO_BT8XX)       += gpio-bt8xx.o
>>   obj-$(CONFIG_GPIO_CLPS711X)    += gpio-clps711x.o
>> diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
>> new file mode 100644
>> index 0000000..4fd9b73
>> --- /dev/null
>> +++ b/drivers/gpio/gpio-bcm-cygnus.c
>> @@ -0,0 +1,705 @@
>> +/*
>> + * Copyright (C) 2014 Broadcom Corporation
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License as
>> + * published by the Free Software Foundation version 2.
>> + *
>> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
>> + * kind, whether express or implied; without even the implied warranty
>> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> + * GNU General Public License for more details.
>> + */
>> +
>> +#include <linux/kernel.h>
>> +#include <linux/slab.h>
>> +#include <linux/module.h>
>> +#include <linux/irq.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/io.h>
>> +#include <linux/gpio.h>
>> +#include <linux/ioport.h>
>> +#include <linux/of_device.h>
>> +#include <linux/of_irq.h>
>> +#include <linux/irqchip/chained_irq.h>
>> +
>> +#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
>> +#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
>> +#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
>> +#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
>> +#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
>> +#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
>> +#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
>> +#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
>> +#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
>> +#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
>> +#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
>> +#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
>> +
>> +/* drive strength control for ASIU GPIO */
>> +#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
>> +
>> +/* drive strength control for CCM GPIO */
>> +#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
>> +
>> +#define GPIO_BANK_SIZE 0x200
>> +#define NGPIOS_PER_BANK 32
>> +#define GPIO_BIT(pin) ((pin) % NGPIOS_PER_BANK)
>> +#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
>> +
>> +#define GPIO_FLAG_BIT_MASK           0xffff
>> +#define GPIO_PULL_BIT_SHIFT          16
>> +#define GPIO_PULL_BIT_MASK           0x3
>> +
>> +#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
>> +#define GPIO_DRV_STRENGTH_BITS       3
>> +#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
>> +
>> +/*
>> + * For GPIO internal pull up/down registers
>> + */
>> +enum gpio_pull {
>> +       GPIO_PULL_NONE = 0,
>> +       GPIO_PULL_UP,
>> +       GPIO_PULL_DOWN,
>> +       GPIO_PULL_INVALID,
>> +};
>> +
>> +/*
>> + * GPIO drive strength
>> + */
>> +enum gpio_drv_strength {
>> +       GPIO_DRV_STRENGTH_2MA = 0,
>> +       GPIO_DRV_STRENGTH_4MA,
>> +       GPIO_DRV_STRENGTH_6MA,
>> +       GPIO_DRV_STRENGTH_8MA,
>> +       GPIO_DRV_STRENGTH_10MA,
>> +       GPIO_DRV_STRENGTH_12MA,
>> +       GPIO_DRV_STRENGTH_14MA,
>> +       GPIO_DRV_STRENGTH_16MA,
>> +       GPIO_DRV_STRENGTH_INVALID,
>> +};
>> +
>> +struct bcm_cygnus_gpio {
>> +       struct device *dev;
>> +       void __iomem *base;
>> +       void __iomem *io_ctrl;
>> +       spinlock_t lock;
>> +       struct gpio_chip gc;
>> +       unsigned num_banks;
>> +       int irq;
>> +       struct irq_domain *irq_domain;
>> +};
>> +
>> +static unsigned int gpio_base_index;
>
> Nope. What happens if there are other GPIO controllers with
> conflicting base GPIOs? I guess this adds more weight to that
> "linux,gpio-base" property I mentioned in
> http://www.spinics.net/lists/arm-kernel/msg384847.html .
>
> The best solution would be for users of the GPIOs provided by this
> driver to not rely on GPIO numbers at all, and exclusively use the
> gpiod interface. Is that an option for you?
>
Doesn't sysfs still rely the global GPIO number? We need to support the 
sysfs GPIO entries because some of our customers are using that for GPIO 
configuration.

I can definitely change the code to use device tree property 
"linux,gpio-base" though.

>> +
>> +static struct bcm_cygnus_gpio *to_bcm_cygnus_gpio(struct gpio_chip *gc)
>> +{
>> +       return container_of(gc, struct bcm_cygnus_gpio, gc);
>> +}
>> +
>> +static int bcm_cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
>> +
>> +       return irq_find_mapping(cygnus_gpio->irq_domain, offset);
>> +}
>> +
>> +static unsigned int __gpio_reg_offset(struct bcm_cygnus_gpio *cygnus_gpio,
>> +               unsigned gpio)
>> +{
>> +       return GPIO_BANK(gpio) * GPIO_BANK_SIZE;
>> +}
>
> The cygnus_gpio argument in this function is unused. The compiler is
> supposed to signal such issues. Have you looked at your compiler
> output?
>
Let me change it to marco GPIO_REG(gpio) as you suggested.

>> +
>> +static unsigned int __gpio_bitpos(struct bcm_cygnus_gpio *cygnus_gpio,
>> +               unsigned gpio)
>> +{
>> +       return GPIO_BIT(gpio);
>> +}
>
> Same here. Also they are so simple that macros would be more adequate
> here I believe:
>
Agreed.

> #define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + reg)
> #define CYGNUS_GPIO_SHIFT(pin) (pin % NGPIOS_PER_BANK) /* and remove
> the GPIO_BIT macro */
>
Right. The two macros make it simpler. Especially CYGNUS_GPIO_REG that 
takes the register offset as well. Will make the change.

>> +
>> +static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
>> +               struct irq_desc *desc)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio;
>> +       struct irq_chip *chip = irq_desc_get_chip(desc);
>> +       int i, bit;
>> +
>> +       chained_irq_enter(chip, desc);
>> +
>> +       cygnus_gpio = irq_get_handler_data(irq);
>> +
>> +       /* go through the entire GPIO banks and handle all interrupts */
>> +       for (i = 0; i < cygnus_gpio->num_banks; i++) {
>> +               unsigned long val = readl(cygnus_gpio->base +
>> +                               (i * GPIO_BANK_SIZE) +
>> +                               CYGNUS_GPIO_INT_MSTAT_OFFSET);
>
> Can you add cygnus_readl() and cygnus_writel() functions to avoid
> explicitly doing this operation on cygnus_gpio->base every time? It
> would be clearer and less error-prone.
>
Hmmm...But 'base' isn't the only register block that we access in this 
driver. There's also 'io_ctrl'.

What I can do is to introduce cygnus_readl() and cygnus_writel() like 
you suggested, and in the particular function 
bcm_cygnus_gpio_set_strength where io_ctrl register is needed, still use 
the normal readl and writel functions.

>> +
>> +               for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
>> +                       unsigned pin = NGPIOS_PER_BANK * i + bit;
>> +                       int child_irq =
>> +                               bcm_cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
>> +
>> +                       /*
>> +                        * Clear the interrupt before invoking the
>> +                        * handler, so we do not leave any window
>> +                        */
>> +                       writel(1 << bit,
>> +                               cygnus_gpio->base + (i * GPIO_BANK_SIZE) +
>> +                               CYGNUS_GPIO_INT_CLR_OFFSET);
>> +
>> +                       generic_handle_irq(child_irq);
>> +               }
>> +       }
>> +
>> +       chained_irq_exit(chip, desc);
>> +}
>> +
>> +static void bcm_cygnus_gpio_irq_ack(struct irq_data *d)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
>> +       unsigned gpio = d->hwirq;
>> +       unsigned int offset, shift;
>> +       u32 val;
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_INT_CLR_OFFSET;
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       val = 1 << shift;
>
> val = BIT(shift);
>
Will change.

>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
>> +                       offset, shift);
>> +}
>> +
>> +static void bcm_cygnus_gpio_irq_mask(struct irq_data *d)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
>> +       unsigned gpio = d->hwirq;
>> +       unsigned int offset, shift;
>> +       u32 val;
>> +       unsigned long flags;
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_INT_MSK_OFFSET;
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
>> +
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val &= ~(1 << shift);
>
> val &= ~BIT(shift);
>
Yes.

>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
>> +
>> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
>> +                       offset, shift);
>> +}
>> +
>> +static void bcm_cygnus_gpio_irq_unmask(struct irq_data *d)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
>> +       unsigned gpio = d->hwirq;
>> +       unsigned int offset, shift;
>> +       u32 val;
>> +       unsigned long flags;
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_INT_MSK_OFFSET;
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
>> +
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val |= 1 << shift;
>
> val |= BIT(shift);
>
> Same remark everywhere it applies in this file.
>
Got it. Will go through the entire driver again and use 'BIT' where it 
applies.

>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
>> +
>> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
>> +                       offset, shift);
>> +}
>
> It seems like you can factorize bcm_cygnus_gpio_irq_mask() and
> bcm_cygnus_gpio_irq_unmask() into one function which prototype would
> be, say:
>
> static void bcm_cygnus_gpio_irq_set_mask(struct irq_data *d, int mask);
>
> which would set of clear the bit according to the value of mask. Then
> your two mask/unmask functions would just need to call this one,
> reducing the amount of redundant code.
>
> Also I noticed that this driver has lots of readl()/twiddle
> bit/writel() sequences. Maybe it would make sense to have a
> cygnus_set_bit(chip, reg, gpio, set) function to factorize this:
>
> void cygnus_set_bit(chip, reg, gpio, set)
> {
>      unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
>      unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
>      u32 val;
>
>      val = cygnus_readl(chip, offset);
>      if (set)
>          val |= BIT(shift);
>      else
>          val &= ~BIT(shift);
>      cygnus_writel(chip, offset, val);
> }
>
Okay. Need to go through the entire driver and make the change.

>> +
>> +static int bcm_cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
>> +       unsigned gpio = d->hwirq;
>> +       unsigned int int_type, dual_edge, edge_lvl;
>> +       unsigned int offset, shift;
>> +       u32 val;
>> +       unsigned long flags;
>> +
>> +       switch (type & IRQ_TYPE_SENSE_MASK) {
>> +       case IRQ_TYPE_EDGE_RISING:
>> +               int_type = 0;
>> +               dual_edge = 0;
>> +               edge_lvl = 1;
>> +               break;
>> +
>> +       case IRQ_TYPE_EDGE_FALLING:
>> +               int_type = 0;
>> +               dual_edge = 0;
>> +               edge_lvl = 0;
>> +               break;
>> +
>> +       case IRQ_TYPE_EDGE_BOTH:
>> +               int_type = 0;
>> +               dual_edge = 1;
>> +               edge_lvl = 0;
>> +               break;
>> +
>> +       case IRQ_TYPE_LEVEL_HIGH:
>> +               int_type = 1;
>> +               dual_edge = 0;
>> +               edge_lvl = 1;
>> +               break;
>> +
>> +       case IRQ_TYPE_LEVEL_LOW:
>> +               int_type = 1;
>> +               dual_edge = 0;
>> +               edge_lvl = 0;
>> +               break;
>> +
>> +       default:
>> +               dev_err(cygnus_gpio->dev, "invalid GPIO irq type 0x%x\n", type);
>> +               return -EINVAL;
>> +       }
>> +
>> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
>> +
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_IN_TYPE_OFFSET;
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val &= ~(1 << shift);
>> +       val |= int_type << shift;
>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_INT_DE_OFFSET;
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val &= ~(1 << shift);
>> +       val |= dual_edge << shift;
>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_INT_EDGE_OFFSET;
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val &= ~(1 << shift);
>> +       val |= edge_lvl << shift;
>> +       writel(val, cygnus_gpio->base + offset);
>
> With the functions/macros suggested above I think you could change the
> 3 blocks above into something like:
>
> cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_IN_TYPE_OFFSET, gpio, int_type);
> cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_DE_OFFSET, gpio, dual_edge);
> cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio, edge_lvl);
>
Yes. Indeed a lot simpler and easier to read. Thanks.

>> +
>> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
>> +
>> +       return 0;
>> +}
>> +
>> +static struct irq_chip bcm_cygnus_gpio_irq_chip = {
>> +       .name = "bcm-cygnus-gpio",
>> +       .irq_ack = bcm_cygnus_gpio_irq_ack,
>> +       .irq_mask = bcm_cygnus_gpio_irq_mask,
>> +       .irq_unmask = bcm_cygnus_gpio_irq_unmask,
>> +       .irq_set_type = bcm_cygnus_gpio_irq_set_type,
>> +};
>> +
>> +static int bcm_cygnus_gpio_direction_input(struct gpio_chip *gc,
>> +               unsigned gpio)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
>> +       unsigned int offset, shift;
>> +       u32 val;
>> +       unsigned long flags;
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_OUT_EN_OFFSET;
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
>> +
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val &= ~(1 << shift);
>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
>> +
>> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
>> +                       offset, shift);
>> +
>> +       return 0;
>> +}
>> +
>> +static int bcm_cygnus_gpio_direction_output(struct gpio_chip *gc,
>> +               unsigned gpio, int value)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
>> +       unsigned int offset, shift;
>> +       u32 val;
>> +       unsigned long flags;
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_OUT_EN_OFFSET;
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
>> +
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val |= 1 << shift;
>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
>> +                       offset, shift);
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_DATA_OUT_OFFSET;
>> +
>> +       val = readl(cygnus_gpio->base + offset);
>> +       if (value)
>> +               val |= 1 << shift;
>> +       else
>> +               val &= ~(1 << shift);
>> +       writel(val, cygnus_gpio->base + offset);
>
> And here you would have:
>
> cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 1);
> cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
>
> Many other sites in this file could be simplified this way.
>
Yes. Will make the change.

>> +
>> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
>> +
>> +       dev_dbg(cygnus_gpio->dev,
>> +               "gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
>> +               gpio, offset, shift, val);
>> +
>> +       return 0;
>> +}
>> +
>> +static void bcm_cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio,
>> +               int value)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
>> +       unsigned int offset, shift;
>> +       u32 val;
>> +       unsigned long flags;
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_DATA_OUT_OFFSET;
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
>> +
>> +       val = readl(cygnus_gpio->base + offset);
>> +       if (value)
>> +               val |= 1 << shift;
>> +       else
>> +               val &= ~(1 << shift);
>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
>> +
>> +       dev_dbg(cygnus_gpio->dev,
>> +               "gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
>> +               gpio, offset, shift, val);
>> +}
>> +
>> +static int bcm_cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
>> +       unsigned int offset, shift;
>> +       u32 val;
>> +
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_DATA_IN_OFFSET;
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val = (val >> shift) & 1;
>> +
>> +       dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u val:%u\n",
>> +                       gpio, offset, shift, val);
>> +
>> +       return val;
>> +}
>> +
>> +static struct lock_class_key gpio_lock_class;
>> +
>> +static int bcm_cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
>> +                                irq_hw_number_t hwirq)
>> +{
>> +       int ret;
>> +
>> +       ret = irq_set_chip_data(irq, d->host_data);
>> +       if (ret < 0)
>> +               return ret;
>> +       irq_set_lockdep_class(irq, &gpio_lock_class);
>> +       irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
>> +                       handle_simple_irq);
>> +       set_irq_flags(irq, IRQF_VALID);
>> +
>> +       return 0;
>> +}
>> +
>> +static void bcm_cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
>> +{
>> +       irq_set_chip_and_handler(irq, NULL, NULL);
>> +       irq_set_chip_data(irq, NULL);
>> +}
>> +
>> +static struct irq_domain_ops bcm_cygnus_irq_ops = {
>> +       .map = bcm_cygnus_gpio_irq_map,
>> +       .unmap = bcm_cygnus_gpio_irq_unmap,
>> +       .xlate = irq_domain_xlate_twocell,
>> +};
>> +
>> +#ifdef CONFIG_OF_GPIO
>> +static void bcm_cygnus_gpio_set_pull(struct bcm_cygnus_gpio *cygnus_gpio,
>> +               unsigned gpio, enum gpio_pull pull)
>> +{
>> +       unsigned int offset, shift;
>> +       u32 val, pullup;
>> +       unsigned long flags;
>> +
>> +       switch (pull) {
>> +       case GPIO_PULL_UP:
>> +               pullup = 1;
>> +               break;
>> +       case GPIO_PULL_DOWN:
>> +               pullup = 0;
>> +               break;
>> +       case GPIO_PULL_NONE:
>> +       case GPIO_PULL_INVALID:
>> +       default:
>> +               return;
>> +       }
>> +
>> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
>> +
>> +       /* set pull up/down */
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_PAD_RES_OFFSET;
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val &= ~(1 << shift);
>> +       if (pullup)
>> +               val |= 1 << shift;
>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       /* enable pad */
>> +       offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +               CYGNUS_GPIO_RES_EN_OFFSET;
>> +       val = readl(cygnus_gpio->base + offset);
>> +       val |= 1 << shift;
>> +       writel(val, cygnus_gpio->base + offset);
>> +
>> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
>> +}
>> +
>> +static void bcm_cygnus_gpio_set_strength(struct bcm_cygnus_gpio *cygnus_gpio,
>> +               unsigned gpio, enum gpio_drv_strength strength)
>> +{
>> +       struct device *dev = cygnus_gpio->dev;
>> +       void __iomem *base;
>> +       unsigned int i, offset, shift;
>> +       u32 val;
>> +       unsigned long flags;
>> +
>> +       /* some GPIO controllers do not support drive strength configuration */
>> +       if (of_find_property(dev->of_node, "no-drv-strength", NULL))
>> +               return;
>> +
>> +       if (cygnus_gpio->io_ctrl) {
>> +               base = cygnus_gpio->io_ctrl;
>> +               offset = CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET;
>> +       } else {
>> +               base = cygnus_gpio->base;
>> +               offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +                       CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET;
>> +       }
>> +
>> +       shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +       spin_lock_irqsave(&cygnus_gpio->lock, flags);
>> +
>> +       for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
>> +               val = readl(base + offset);
>> +               val &= ~(1 << shift);
>> +               val |= ((strength >> i) & 0x1) << shift;
>> +               writel(val, base + offset);
>> +               offset += 4;
>> +       }
>> +
>> +       spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
>> +}
>> +
>> +static int bcm_cygnus_gpio_of_xlate(struct gpio_chip *gc,
>> +               const struct of_phandle_args *gpiospec, u32 *flags)
>> +{
>> +       struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
>> +       enum gpio_pull pull;
>> +       enum gpio_drv_strength strength;
>> +
>> +       if (gc->of_gpio_n_cells < 2)
>> +               return -EINVAL;
>> +
>> +       if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
>> +               return -EINVAL;
>> +
>> +       if (gpiospec->args[0] >= gc->ngpio)
>> +               return -EINVAL;
>> +
>> +       pull = (gpiospec->args[1] >> GPIO_PULL_BIT_SHIFT) & GPIO_PULL_BIT_MASK;
>> +       if (WARN_ON(pull >= GPIO_PULL_INVALID))
>> +               return -EINVAL;
>> +
>> +       strength = (gpiospec->args[1] >> GPIO_DRV_STRENGTH_BIT_SHIFT) &
>> +               GPIO_DRV_STRENGTH_BIT_MASK;
>> +
>> +       if (flags)
>> +               *flags = gpiospec->args[1] & GPIO_FLAG_BIT_MASK;
>> +
>> +       bcm_cygnus_gpio_set_pull(cygnus_gpio, gpiospec->args[0], pull);
>> +       bcm_cygnus_gpio_set_strength(cygnus_gpio, gpiospec->args[0], strength);
>> +
>> +       return gpiospec->args[0];
>> +}
>> +#endif
>> +
>> +static const struct of_device_id bcm_cygnus_gpio_of_match[] = {
>> +       { .compatible = "brcm,cygnus-gpio" },
>> +       { }
>> +};
>> +MODULE_DEVICE_TABLE(of, bcm_cygnus_gpio_of_match);
>> +
>> +static int bcm_cygnus_gpio_probe(struct platform_device *pdev)
>> +{
>> +       struct device *dev = &pdev->dev;
>> +       const struct of_device_id *match;
>> +       struct resource *res;
>> +       struct bcm_cygnus_gpio *cygnus_gpio;
>> +       struct gpio_chip *gc;
>> +       u32 i, ngpios;
>> +       int ret;
>> +
>> +       match = of_match_device(bcm_cygnus_gpio_of_match, dev);
>> +       if (!match) {
>> +               dev_err(&pdev->dev, "failed to find GPIO controller\n");
>> +               return -ENODEV;
>> +       }
>
> Do you still need that block of code? match is never used in this function.
>
Will get rid of it. Pretty much a redundant check.

> ... well, I think you get the drill. Let's first start by factorizing
> as much code as can be to make this driver easier to read (I have a
> few leads, but I am sure there are other similar factorizations that
> can be made). Let's also get rid of this static gpio_base_index
> variable that effectively prevents any other GPIO driver from being
> used alongside with this one. If you really need to use global GPIO
> numbers, let's see if Linus agrees for that "linux,gpio-base" DT
> property that would certainly make many people happy.
>
Will make the change. Thanks for the review. Very helpful!

We do need to use global GPIO numbers, at least before sysfs GPIO 
interface is updated to use gpiod. I'm fine with using 
"linux,gpio-base". Btw, I assume that's per GPIO controller based device 
tree property, correct?
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[PATCH v4 3/5] ARM: mach-bcm: Enable GPIO support for Cygnus

[Ray Jui]

Enable GPIO driver for Broadcom Cygnus SoC by selecting GPIO_BCM_CYGNUS

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/mach-bcm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index aaeec78..5066d5d 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -29,6 +29,7 @@ config ARCH_BCM_IPROC
 config ARCH_BCM_CYGNUS
 	bool "Broadcom Cygnus Support" if ARCH_MULTI_V7
 	select ARCH_BCM_IPROC
+	select GPIO_BCM_CYGNUS
 	help
 	  Enable support for the Cygnus family,
 	  which includes the following variants:
-- 
1.7.9.5

[PATCH v4 4/5] ARM: dts: enable GPIO for Broadcom Cygnus

[Ray Jui]

This enables all 3 GPIO controllers including the ASIU GPIO, the
chipcommonG GPIO, and the ALWAYS-ON GPIO, for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |   30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..fbc8257 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,36 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x1800a000 0x50>,
+			<0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-drv-strength;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v4 5/5] MAINTAINERS: Entry for Cygnus GPIO driver

[Ray Jui]

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 MAINTAINERS |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index e6bff3a..8473422 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2202,6 +2202,13 @@ N:	bcm9583*
 N:	bcm583*
 N:	bcm113*
 
+BROADCOM CYGNUS GPIO DRIVER
+M:	Ray Jui <rjui@broadcom.com>
+L:	bcm-kernel-feedback-list@broadcom.com
+S:	Supported
+F:	drivers/gpio/gpio-bcm-cygnus.c
+F:	Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
+
 BROADCOM KONA GPIO DRIVER
 M:	Ray Jui <rjui@broadcom.com>
 L:	bcm-kernel-feedback-list@broadcom.com
-- 
1.7.9.5

[PATCH v5 0/3] Add gpio support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the same Cygnus GPIO driver

Changes from v4:
 - Use DT property "linux,gpio-base" to define GPIO base number
 - factorize common code to improve code readability and reduce code size
 - remove "bcm_" prefix on function and struct names
 - improve debugging prints
 - default GPIO_BCM_CYGNUS to y in Kconfig (it still depends on
   ARCH_BCM_CYGNUS). This way we do not need to select it from the
   arch/arm/mach-bcm/Kconfig
 - Get rid of redundant MAINTAINER entry for this driver. It will be maintained
   by Broadcom iProc/Cygnus maintainers
 - Update device tree document based on driver changes

Changes from v3:
 - Fix dt property tpyo
 - Fix incorrect GPIO compatible ID in device tree binding document example

Changes from v2:
 - Consolidate different compatible IDs into "brcm,cygnus-gpio"
 - Get rid of redundant "no-interrupt" property

Changes from v1:
 - Get rid of inline qualifier
 - Get rid of redundant check in the ISR
 - Other minor fixes to imrove code readability

Ray Jui (3):
  gpio: Cygnus: define Broadcom Cygnus GPIO binding
  gpio: Cygnus: add GPIO driver
  ARM: dts: enable GPIO for Broadcom Cygnus

 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   87 +++
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   33 ++
 drivers/gpio/Kconfig                               |   12 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/gpio-bcm-cygnus.c                     |  613 ++++++++++++++++++++
 5 files changed, 746 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

-- 
1.7.9.5

[PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

Document the GPIO device tree binding for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   87 ++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt

diff --git a/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
new file mode 100644
index 0000000..0e446d4
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
@@ -0,0 +1,87 @@
+Broadcom Cygnus GPIO Controller
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-gpio"
+
+- reg:
+    Define the base and range of the I/O address space that contain the Cygnus
+GPIO controller registers
+
+- ngpios:
+    Total number of GPIOs the controller provides
+
+- linux,gpio-base:
+    Base GPIO number of this controller
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's domain) and the second cell is used for the following:
+    bit[0]: polarity (0 for normal and 1 for inverted)
+    bit[18:16]: internal pull up/down: 0 - pull up/down disabled
+                                       1 - pull up enabled
+                                       2 - pull down enabled
+    bit[22:20]: drive strength: 0 - 2 mA
+                                1 - 4 mA
+                                2 - 6 mA
+                                3 - 8 mA
+                                4 - 10 mA
+                                5 - 12 mA
+                                6 - 14 mA
+                                7 - 16 mA
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller. Not all Cygnus GPIO
+interfaces support interrupt, e.g., the CRMU GPIO controller does not have its
+interrupt routed to the main processor's GIC
+
+- interrupts:
+    The interrupt outputs from the GPIO controller.
+
+- no-drv-strength:
+    Specifies the GPIO controller does not support drive strength configuration
+
+Example:
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		linux,gpio-base = <0>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		linux,gpio-base = <146>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-drv-strength;
+	};
+
+	/*
+	 * Touchscreen that uses the ASIU GPIO 100, with internal pull-up
+	 * enabled
+	 */
+	tsc {
+		...
+		...
+		gpio-event = <&gpio_asiu 100 0x10000>;
+	};
+
+	/* Bluetooth that uses the CRMU GPIO 2, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_crmu 2 1>
+	}
-- 
1.7.9.5

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Arnd Bergmann]

On Thursday 11 December 2014 16:05:04 Ray Jui wrote:
> +
> +- linux,gpio-base:
> +    Base GPIO number of this controller
> +
> 

We've NAK'ed properties like this multiple times before, and it
doesn't get any better this time. What are you trying to achieve
here?

	Arnd

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Alexandre Courbot]

On Fri, Dec 12, 2014 at 9:08 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Thursday 11 December 2014 16:05:04 Ray Jui wrote:
>> +
>> +- linux,gpio-base:
>> +    Base GPIO number of this controller
>> +
>>
>
> We've NAK'ed properties like this multiple times before, and it
> doesn't get any better this time. What are you trying to achieve
> here?

I am to blame for suggesting using this property to Ray, and I am
fully aware that this has been rejected before, but look at what
people came with recently to palliate the lack of control over the
GPIO number space for DT platforms:

http://www.spinics.net/lists/arm-kernel/msg384847.html
https://lkml.org/lkml/2014/12/10/133

Right now GPIO numbering for platforms using DT is a very inconsistent
process, subject to change by the simple action of adjusting the value
of ARCH_NR_GPIOS (which we did recently, btw), adding a new GPIO
controller, or changing the probe order of devices. For users of the
integer or sysfs interfaces, this results in GPIO numbers that change,
and drivers and/or user-space programs that behave incorrectly.
Ironically, the only way to have consistent numbers is to use the old
platform files, where you can specify the base number of a gpio_chip.

DT is actually probably not such a bad place to provide consistency in
GPIO numbering. It has a global vision of the system layout, including
all GPIO controllers and the number of GPIOs they include, and thus
can make informed decisions. It provides a consistent result
regardless of probe order. And allowing it to assign GPIO bases to
controllers will free us from the nonsensical dependency of some
arbitrary upper-bound for GPIO numbers that ARCH_NR_GPIOS imposes on
us. Also about ARCH_NR_GPIOS, the plan is to eventually remove it
since we don't need it anymore after the removal of the global
gpio_descs array. This will again interfere with the numbering of GPIO
chips that do not have a base number provided.

Note that I don't really like this, either - but the problem is the
GPIO integer interface. Until everyone has upgraded to gpiod and we
have a replacement for the current sysfs interface (this will take a
while) we have to cope with this. This issue has been bothering users
for years, so this time I'd like to try and solve it the less ugly
way. If there is a better solution, of course I'm all for it.

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Arnd Bergmann]

On Friday 12 December 2014 22:05:37 Alexandre Courbot wrote:
> On Fri, Dec 12, 2014 at 9:08 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> > On Thursday 11 December 2014 16:05:04 Ray Jui wrote:
> >> +
> >> +- linux,gpio-base:
> >> +    Base GPIO number of this controller
> >> +
> >>
> >
> > We've NAK'ed properties like this multiple times before, and it
> > doesn't get any better this time. What are you trying to achieve
> > here?
> 
> I am to blame for suggesting using this property to Ray, and I am
> fully aware that this has been rejected before, but look at what
> people came with recently to palliate the lack of control over the
> GPIO number space for DT platforms:
> 
> http://www.spinics.net/lists/arm-kernel/msg384847.html
> https://lkml.org/lkml/2014/12/10/133
> 
> Right now GPIO numbering for platforms using DT is a very inconsistent
> process, subject to change by the simple action of adjusting the value
> of ARCH_NR_GPIOS (which we did recently, btw), adding a new GPIO
> controller, or changing the probe order of devices. For users of the
> integer or sysfs interfaces, this results in GPIO numbers that change,
> and drivers and/or user-space programs that behave incorrectly.
> Ironically, the only way to have consistent numbers is to use the old
> platform files, where you can specify the base number of a gpio_chip.
> 
> DT is actually probably not such a bad place to provide consistency in
> GPIO numbering. It has a global vision of the system layout, including
> all GPIO controllers and the number of GPIOs they include, and thus
> can make informed decisions. It provides a consistent result
> regardless of probe order. And allowing it to assign GPIO bases to
> controllers will free us from the nonsensical dependency of some
> arbitrary upper-bound for GPIO numbers that ARCH_NR_GPIOS imposes on
> us. Also about ARCH_NR_GPIOS, the plan is to eventually remove it
> since we don't need it anymore after the removal of the global
> gpio_descs array. This will again interfere with the numbering of GPIO
> chips that do not have a base number provided.
> 
> Note that I don't really like this, either - but the problem is the
> GPIO integer interface. Until everyone has upgraded to gpiod and we
> have a replacement for the current sysfs interface (this will take a
> while) we have to cope with this. This issue has been bothering users
> for years, so this time I'd like to try and solve it the less ugly
> way. If there is a better solution, of course I'm all for it.

I think the scheme will fail if you ever get gpio controllers that are
not part of the DT: We have hotpluggable devices (PCI, USB, ...) that
are not represented in DT and that may also provide GPIOs for internal
uses.

The current state of affairs is definitely problematic, but defining
the GPIO numbers in DT properties would only be a relative improvement,
not a solution, and I fear it would make it harder to change the kernel
to remove the gpio numbers eventually.

I wonder if we could instead come up with an approach that completely
randomizes the gpio numbers (as a compile-time option) to find any
places that still rely on specific numbers.

	Arnd

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

On 12/12/2014 7:28 AM, Arnd Bergmann wrote:
> On Friday 12 December 2014 22:05:37 Alexandre Courbot wrote:
>> On Fri, Dec 12, 2014 at 9:08 PM, Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org> wrote:
>>> On Thursday 11 December 2014 16:05:04 Ray Jui wrote:
>>>> +
>>>> +- linux,gpio-base:
>>>> +    Base GPIO number of this controller
>>>> +
>>>>
>>>
>>> We've NAK'ed properties like this multiple times before, and it
>>> doesn't get any better this time. What are you trying to achieve
>>> here?
>>
>> I am to blame for suggesting using this property to Ray, and I am
>> fully aware that this has been rejected before, but look at what
>> people came with recently to palliate the lack of control over the
>> GPIO number space for DT platforms:
>>
>> http://www.spinics.net/lists/arm-kernel/msg384847.html
>> https://lkml.org/lkml/2014/12/10/133
>>
>> Right now GPIO numbering for platforms using DT is a very inconsistent
>> process, subject to change by the simple action of adjusting the value
>> of ARCH_NR_GPIOS (which we did recently, btw), adding a new GPIO
>> controller, or changing the probe order of devices. For users of the
>> integer or sysfs interfaces, this results in GPIO numbers that change,
>> and drivers and/or user-space programs that behave incorrectly.
>> Ironically, the only way to have consistent numbers is to use the old
>> platform files, where you can specify the base number of a gpio_chip.
>>
>> DT is actually probably not such a bad place to provide consistency in
>> GPIO numbering. It has a global vision of the system layout, including
>> all GPIO controllers and the number of GPIOs they include, and thus
>> can make informed decisions. It provides a consistent result
>> regardless of probe order. And allowing it to assign GPIO bases to
>> controllers will free us from the nonsensical dependency of some
>> arbitrary upper-bound for GPIO numbers that ARCH_NR_GPIOS imposes on
>> us. Also about ARCH_NR_GPIOS, the plan is to eventually remove it
>> since we don't need it anymore after the removal of the global
>> gpio_descs array. This will again interfere with the numbering of GPIO
>> chips that do not have a base number provided.
>>
>> Note that I don't really like this, either - but the problem is the
>> GPIO integer interface. Until everyone has upgraded to gpiod and we
>> have a replacement for the current sysfs interface (this will take a
>> while) we have to cope with this. This issue has been bothering users
>> for years, so this time I'd like to try and solve it the less ugly
>> way. If there is a better solution, of course I'm all for it.
>
> I think the scheme will fail if you ever get gpio controllers that are
> not part of the DT: We have hotpluggable devices (PCI, USB, ...) that
> are not represented in DT and that may also provide GPIOs for internal
> uses.
>
> The current state of affairs is definitely problematic, but defining
> the GPIO numbers in DT properties would only be a relative improvement,
> not a solution, and I fear it would make it harder to change the kernel
> to remove the gpio numbers eventually.
>
> I wonder if we could instead come up with an approach that completely
> randomizes the gpio numbers (as a compile-time option) to find any
> places that still rely on specific numbers.
>
> 	Arnd
>
Okay, if people think defining the GPIO base number in DT properties as 
a temporary, transient solution is not acceptable, I can switch the 
driver to use dynamic GPIO number allocation (by setting gpio base to a 
negative number and let gpiochip_add find a usable base number).

Like I said previously, dynamic GPIO allocation works fine in the 
kernel, as long as all of our GPIO clients in the kernel use gpiod based 
API, which is what we will enforce going forward. The only problem is 
with some of our customers who use GPIO through sysfs and expect fixed 
global GPIO numbers. Thinking about this more, it's probably not that 
difficult to add a script for those customers to convert/map the GPIO 
numbers based on readings parsed from sysfs, so I guess that's fine.

I'll submit v6 patchset with DT property "linux,gpio-base" removed.
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Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Arnd Bergmann]

On Monday 15 December 2014 13:35:47 Ray Jui wrote:
> 
> Like I said previously, dynamic GPIO allocation works fine in the 
> kernel, as long as all of our GPIO clients in the kernel use gpiod based 
> API, which is what we will enforce going forward. The only problem is 
> with some of our customers who use GPIO through sysfs and expect fixed 
> global GPIO numbers. Thinking about this more, it's probably not that 
> difficult to add a script for those customers to convert/map the GPIO 
> numbers based on readings parsed from sysfs, so I guess that's fine.
> 

I think we discussed the user space interface a number of times
in the past, but I forgot the outcome. Either there is already
a way to name gpio lines uniquely in sysfs, or there should be
one.

Can you reach the gpio interfaces using /sys/devices/0001234.bus/1234566.gpiocontroller/...? 

	Arnd

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

On 12/15/2014 1:57 PM, Arnd Bergmann wrote:
> On Monday 15 December 2014 13:35:47 Ray Jui wrote:
>>
>> Like I said previously, dynamic GPIO allocation works fine in the
>> kernel, as long as all of our GPIO clients in the kernel use gpiod based
>> API, which is what we will enforce going forward. The only problem is
>> with some of our customers who use GPIO through sysfs and expect fixed
>> global GPIO numbers. Thinking about this more, it's probably not that
>> difficult to add a script for those customers to convert/map the GPIO
>> numbers based on readings parsed from sysfs, so I guess that's fine.
>>
>
> I think we discussed the user space interface a number of times
> in the past, but I forgot the outcome. Either there is already
> a way to name gpio lines uniquely in sysfs, or there should be
> one.
>
> Can you reach the gpio interfaces using /sys/devices/0001234.bus/1234566.gpiocontroller/...?
>
> 	Arnd
>
We use entries under /sys/class/gpio/ to control GPIOs. All base, label, 
and ngpio info specific to a GPIO controller can be found there.

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Alexandre Courbot]

On Tue, Dec 16, 2014 at 6:57 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Monday 15 December 2014 13:35:47 Ray Jui wrote:
>>
>> Like I said previously, dynamic GPIO allocation works fine in the
>> kernel, as long as all of our GPIO clients in the kernel use gpiod based
>> API, which is what we will enforce going forward. The only problem is
>> with some of our customers who use GPIO through sysfs and expect fixed
>> global GPIO numbers. Thinking about this more, it's probably not that
>> difficult to add a script for those customers to convert/map the GPIO
>> numbers based on readings parsed from sysfs, so I guess that's fine.
>>
>
> I think we discussed the user space interface a number of times
> in the past, but I forgot the outcome. Either there is already
> a way to name gpio lines uniquely in sysfs, or there should be
> one.
>
> Can you reach the gpio interfaces using /sys/devices/0001234.bus/1234566.gpiocontroller/...?

No, but it seems like this is exactly the solution we need. We could
have an "export" node there that takes a relative GPIO number and
exports it under
/sys/devices/0001234.bus/1234566.gpiocontroller/exported/ the same way
the current sysfs exporter does. Then for convenience we could also
allow exported GPIOs to take names to be used under the shorter
/sys/class/gpio/ (named GPIOs is another request we pushed back many
times but that keeps coming).

Let's see if I can come with a patch. That would at least give us
something to reply to the many people that hit this issue.

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Linus Walleij]

On Mon, Dec 15, 2014 at 10:57 PM, Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org> wrote:
> On Monday 15 December 2014 13:35:47 Ray Jui wrote:
>>
>> Like I said previously, dynamic GPIO allocation works fine in the
>> kernel, as long as all of our GPIO clients in the kernel use gpiod based
>> API, which is what we will enforce going forward. The only problem is
>> with some of our customers who use GPIO through sysfs and expect fixed
>> global GPIO numbers. Thinking about this more, it's probably not that
>> difficult to add a script for those customers to convert/map the GPIO
>> numbers based on readings parsed from sysfs, so I guess that's fine.
>>
>
> I think we discussed the user space interface a number of times
> in the past, but I forgot the outcome. Either there is already
> a way to name gpio lines uniquely in sysfs, or there should be
> one.

There is one. The struct gpio_chip contains a .names field with
strings giving names to the GPIOs on the chip.

This field does not have standardized DT bindings or anything
but should be used.

Overall the sysfs interface is an abomination for relying on
the notoriously unstable GPIO numberspace and other things.
It was merged when the subsystem lacked a maintainer.

Yours,
Linus Walleij
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Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Alexandre Courbot]

On Sat, Dec 13, 2014 at 12:28 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Friday 12 December 2014 22:05:37 Alexandre Courbot wrote:
>> On Fri, Dec 12, 2014 at 9:08 PM, Arnd Bergmann <arnd@arndb.de> wrote:
>> > On Thursday 11 December 2014 16:05:04 Ray Jui wrote:
>> >> +
>> >> +- linux,gpio-base:
>> >> +    Base GPIO number of this controller
>> >> +
>> >>
>> >
>> > We've NAK'ed properties like this multiple times before, and it
>> > doesn't get any better this time. What are you trying to achieve
>> > here?
>>
>> I am to blame for suggesting using this property to Ray, and I am
>> fully aware that this has been rejected before, but look at what
>> people came with recently to palliate the lack of control over the
>> GPIO number space for DT platforms:
>>
>> http://www.spinics.net/lists/arm-kernel/msg384847.html
>> https://lkml.org/lkml/2014/12/10/133
>>
>> Right now GPIO numbering for platforms using DT is a very inconsistent
>> process, subject to change by the simple action of adjusting the value
>> of ARCH_NR_GPIOS (which we did recently, btw), adding a new GPIO
>> controller, or changing the probe order of devices. For users of the
>> integer or sysfs interfaces, this results in GPIO numbers that change,
>> and drivers and/or user-space programs that behave incorrectly.
>> Ironically, the only way to have consistent numbers is to use the old
>> platform files, where you can specify the base number of a gpio_chip.
>>
>> DT is actually probably not such a bad place to provide consistency in
>> GPIO numbering. It has a global vision of the system layout, including
>> all GPIO controllers and the number of GPIOs they include, and thus
>> can make informed decisions. It provides a consistent result
>> regardless of probe order. And allowing it to assign GPIO bases to
>> controllers will free us from the nonsensical dependency of some
>> arbitrary upper-bound for GPIO numbers that ARCH_NR_GPIOS imposes on
>> us. Also about ARCH_NR_GPIOS, the plan is to eventually remove it
>> since we don't need it anymore after the removal of the global
>> gpio_descs array. This will again interfere with the numbering of GPIO
>> chips that do not have a base number provided.
>>
>> Note that I don't really like this, either - but the problem is the
>> GPIO integer interface. Until everyone has upgraded to gpiod and we
>> have a replacement for the current sysfs interface (this will take a
>> while) we have to cope with this. This issue has been bothering users
>> for years, so this time I'd like to try and solve it the less ugly
>> way. If there is a better solution, of course I'm all for it.
>
> I think the scheme will fail if you ever get gpio controllers that are
> not part of the DT: We have hotpluggable devices (PCI, USB, ...) that
> are not represented in DT and that may also provide GPIOs for internal
> uses.
>
> The current state of affairs is definitely problematic, but defining
> the GPIO numbers in DT properties would only be a relative improvement,
> not a solution, and I fear it would make it harder to change the kernel
> to remove the gpio numbers eventually.

You are absolutely right that this would be only a partial solution.
However this is a situation where there is no absolute fix (besides
dropping the GPIO numbers completely) and the relief this property
would brings makes it up for its shortcomings IMHO.

> I wonder if we could instead come up with an approach that completely
> randomizes the gpio numbers (as a compile-time option) to find any
> places that still rely on specific numbers.

A.k.a. Linus and Alex' hate mail generator. :P

Actually we are not that far from being able to do completely without
any GPIO number, and maybe that's what we should aim for. I think the
only remaining offender is the sysfs interface. If we could reach GPIO
controllers through a fixed path and just export their GPIOs there, I
believe we would have fixed the whole issue.

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Arnd Bergmann]

On Wednesday 17 December 2014 11:45:01 Alexandre Courbot wrote:
> 
> Actually we are not that far from being able to do completely without
> any GPIO number, and maybe that's what we should aim for. I think the
> only remaining offender is the sysfs interface. If we could reach GPIO
> controllers through a fixed path and just export their GPIOs there, I
> believe we would have fixed the whole issue.

What about the hundreds of board files and device drivers that still
reference hardcoded gpio numbers? The problem seems mostly solved for
anything that uses DT, but there are some architectures and a number
of ARM platforms that don't use DT and probably never will.

I would assume they could all be changed to use gpiod_lookup tables,
but that's a lot of work.

	Arnd

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Alexandre Courbot]

On Wed, Dec 17, 2014 at 7:26 PM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Wednesday 17 December 2014 11:45:01 Alexandre Courbot wrote:
>>
>> Actually we are not that far from being able to do completely without
>> any GPIO number, and maybe that's what we should aim for. I think the
>> only remaining offender is the sysfs interface. If we could reach GPIO
>> controllers through a fixed path and just export their GPIOs there, I
>> believe we would have fixed the whole issue.
>
> What about the hundreds of board files and device drivers that still
> reference hardcoded gpio numbers? The problem seems mostly solved for
> anything that uses DT, but there are some architectures and a number
> of ARM platforms that don't use DT and probably never will.
>
> I would assume they could all be changed to use gpiod_lookup tables,
> but that's a lot of work.

Indeed, that's not something to expect, as I replied to Russell. Sorry
about the confusion.

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Russell King - ARM Linux]

On Wed, Dec 17, 2014 at 11:45:01AM +0900, Alexandre Courbot wrote:
> Actually we are not that far from being able to do completely without
> any GPIO number, and maybe that's what we should aim for. I think the
> only remaining offender is the sysfs interface.

And that is a user API, and there's lots of users of it (eg, on Raspberry
Pi platforms.)  So changing it isn't going to be easy - I'd say that it's
impractical.

What you're suggesting would be like re-numbering Linux syscalls.

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Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Alexandre Courbot]

On Wed, Dec 17, 2014 at 7:44 PM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> On Wed, Dec 17, 2014 at 11:45:01AM +0900, Alexandre Courbot wrote:
>> Actually we are not that far from being able to do completely without
>> any GPIO number, and maybe that's what we should aim for. I think the
>> only remaining offender is the sysfs interface.
>
> And that is a user API, and there's lots of users of it (eg, on Raspberry
> Pi platforms.)  So changing it isn't going to be easy - I'd say that it's
> impractical.
>
> What you're suggesting would be like re-numbering Linux syscalls.

Uh, I expressed myself poorly. What I intended to say is that once we
have a sysfs alternative that does not rely on GPIO numbers (and thus
have the same feature coverage as the integer interface), we can
require new platforms to exclusively rely on gpiod/sysfs2, and
encourage older users to switch to it if they have an issue with the
way integers are handled or need one of the new features.

I don't foresee that we will ever be able to retire the integer
interface, however I would like to be able to say "your problem will
be solved if you switch to gpiod" instead of having to juggle with
potentially conflicting integer range requirements from different
platforms. Right now the only thing that prevents us to say that is
the lack of a consistent sysfs interface.

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Linus Walleij]

On Wed, Dec 17, 2014 at 11:44 AM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> On Wed, Dec 17, 2014 at 11:45:01AM +0900, Alexandre Courbot wrote:
>> Actually we are not that far from being able to do completely without
>> any GPIO number, and maybe that's what we should aim for. I think the
>> only remaining offender is the sysfs interface.
>
> And that is a user API, and there's lots of users of it (eg, on Raspberry
> Pi platforms.)  So changing it isn't going to be easy - I'd say that it's
> impractical.
>
> What you're suggesting would be like re-numbering Linux syscalls.

The problem is that right now if we set the .base of a gpio_chip
to -1 for dynamic allocation of GPIO numbers and we have more
than one GPIO chip in the system, the numbers basically depend
on probe order, and may theoretically even differ between two boots.

So in these cases preserving the ABI means preserving the
unpredictability of these assigned numbers or something.

For the old usecases with a single GPIO controller and a fixed
base offset of e.g. 0 (which I suspect was implicit in the initial
design of the subsystem) things work fine as always, it's these new
dynamic use cases that destabilize the ABI.

Yours,
Linus Walleij

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Russell King - ARM Linux]

On Tue, Jan 13, 2015 at 09:06:15AM +0100, Linus Walleij wrote:
> On Wed, Dec 17, 2014 at 11:44 AM, Russell King - ARM Linux
> <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org> wrote:
> > On Wed, Dec 17, 2014 at 11:45:01AM +0900, Alexandre Courbot wrote:
> >> Actually we are not that far from being able to do completely without
> >> any GPIO number, and maybe that's what we should aim for. I think the
> >> only remaining offender is the sysfs interface.
> >
> > And that is a user API, and there's lots of users of it (eg, on Raspberry
> > Pi platforms.)  So changing it isn't going to be easy - I'd say that it's
> > impractical.
> >
> > What you're suggesting would be like re-numbering Linux syscalls.
> 
> The problem is that right now if we set the .base of a gpio_chip
> to -1 for dynamic allocation of GPIO numbers and we have more
> than one GPIO chip in the system, the numbers basically depend
> on probe order, and may theoretically even differ between two boots.
> 
> So in these cases preserving the ABI means preserving the
> unpredictability of these assigned numbers or something.
> 
> For the old usecases with a single GPIO controller and a fixed
> base offset of e.g. 0 (which I suspect was implicit in the initial
> design of the subsystem) things work fine as always, it's these new
> dynamic use cases that destabilize the ABI.

Since GPIOs are exported through sysfs into userland by GPIO number,
and we know that there are users of it (see
https://github.com/pilight/wiringX) which hard encode GPIO numbers,
so this is *really* something that we as kernel developers can't
change without breaking such users.

So, what I'm saying is be very careful about moving to a fully
dynamic space: you could end up breaking userspace if you do.

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Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Linus Walleij]

On Tue, Jan 13, 2015 at 12:41 PM, Russell King - ARM Linux
<linux@arm.linux.org.uk> wrote:
> On Tue, Jan 13, 2015 at 09:06:15AM +0100, Linus Walleij wrote:
>> On Wed, Dec 17, 2014 at 11:44 AM, Russell King - ARM Linux
>> <linux@arm.linux.org.uk> wrote:
>> > On Wed, Dec 17, 2014 at 11:45:01AM +0900, Alexandre Courbot wrote:
>> >> Actually we are not that far from being able to do completely without
>> >> any GPIO number, and maybe that's what we should aim for. I think the
>> >> only remaining offender is the sysfs interface.
>> >
>> > And that is a user API, and there's lots of users of it (eg, on Raspberry
>> > Pi platforms.)  So changing it isn't going to be easy - I'd say that it's
>> > impractical.
>> >
>> > What you're suggesting would be like re-numbering Linux syscalls.
>>
>> The problem is that right now if we set the .base of a gpio_chip
>> to -1 for dynamic allocation of GPIO numbers and we have more
>> than one GPIO chip in the system, the numbers basically depend
>> on probe order, and may theoretically even differ between two boots.
>>
>> So in these cases preserving the ABI means preserving the
>> unpredictability of these assigned numbers or something.
>>
>> For the old usecases with a single GPIO controller and a fixed
>> base offset of e.g. 0 (which I suspect was implicit in the initial
>> design of the subsystem) things work fine as always, it's these new
>> dynamic use cases that destabilize the ABI.
>
> Since GPIOs are exported through sysfs into userland by GPIO number,
> and we know that there are users of it (see
> https://github.com/pilight/wiringX) which hard encode GPIO numbers,
> so this is *really* something that we as kernel developers can't
> change without breaking such users.

I agree.

In some other thread I came up with the idea that if
we add enumerated aliases for the GPIO controllers in the
device tree (so that each can be assigned a sequence number,
like we do on the PL011 ttys) we can assign them numbers
starting from 0.

The only reason that dynamic GPIO start from some random
high offset is that the on-chip GPIOs are assumed to be present
at offset 0+, so this is done so that the dynamic controllers
avoid colliding with them. (At least that is how I understand it.)
So on a fully DT-enabled system assigning numbers starting
from 0 should be kind of default.

Yours,
Linus Walleij

Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

On 12/12/2014 5:05 AM, Alexandre Courbot wrote:
> On Fri, Dec 12, 2014 at 9:08 PM, Arnd Bergmann <arnd@arndb.de> wrote:
>> On Thursday 11 December 2014 16:05:04 Ray Jui wrote:
>>> +
>>> +- linux,gpio-base:
>>> +    Base GPIO number of this controller
>>> +
>>>
>>
>> We've NAK'ed properties like this multiple times before, and it
>> doesn't get any better this time. What are you trying to achieve
>> here?
>
> I am to blame for suggesting using this property to Ray, and I am
> fully aware that this has been rejected before, but look at what
> people came with recently to palliate the lack of control over the
> GPIO number space for DT platforms:
>
> http://www.spinics.net/lists/arm-kernel/msg384847.html
> https://lkml.org/lkml/2014/12/10/133
>
> Right now GPIO numbering for platforms using DT is a very inconsistent
> process, subject to change by the simple action of adjusting the value
> of ARCH_NR_GPIOS (which we did recently, btw), adding a new GPIO
> controller, or changing the probe order of devices. For users of the
> integer or sysfs interfaces, this results in GPIO numbers that change,
> and drivers and/or user-space programs that behave incorrectly.
> Ironically, the only way to have consistent numbers is to use the old
> platform files, where you can specify the base number of a gpio_chip.
>
> DT is actually probably not such a bad place to provide consistency in
> GPIO numbering. It has a global vision of the system layout, including
> all GPIO controllers and the number of GPIOs they include, and thus
> can make informed decisions. It provides a consistent result
> regardless of probe order. And allowing it to assign GPIO bases to
> controllers will free us from the nonsensical dependency of some
> arbitrary upper-bound for GPIO numbers that ARCH_NR_GPIOS imposes on
> us. Also about ARCH_NR_GPIOS, the plan is to eventually remove it
> since we don't need it anymore after the removal of the global
> gpio_descs array. This will again interfere with the numbering of GPIO
> chips that do not have a base number provided.
>
> Note that I don't really like this, either - but the problem is the
> GPIO integer interface. Until everyone has upgraded to gpiod and we
> have a replacement for the current sysfs interface (this will take a
> while) we have to cope with this. This issue has been bothering users
> for years, so this time I'd like to try and solve it the less ugly
> way. If there is a better solution, of course I'm all for it.
>
Agreed.

Since we are just starting to upstream all of our drivers for 
iProc/Cygnus, enforcing all of our new drivers to use the gpiod 
interface is not an issue and is something that should be done.

Our current issue is really on the sysfs interface, as I mentioned 
earlier, a lot of our customers use the sysfs interface for GPIO access. 
Until the sysfs interface issue is resolved, we sort of need a way to 
maintain the GPIO base between different GPIO controllers.

[PATCH v5 2/3] gpio: Cygnus: add GPIO driver

[Ray Jui]

This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller, 2) the
chipCommonG GPIO controller, and 3) the ALWAYS-ON GPIO controller

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/gpio/Kconfig           |   12 +
 drivers/gpio/Makefile          |    1 +
 drivers/gpio/gpio-bcm-cygnus.c |  613 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 626 insertions(+)
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 633ec21..1790ffd 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -126,6 +126,18 @@ config GPIO_74XX_MMIO
 	    8 bits:	74244 (Input), 74273 (Output)
 	    16 bits:	741624 (Input), 7416374 (Output)
 
+config GPIO_BCM_CYGNUS
+	bool "Broadcom Cygnus GPIO support"
+	depends on ARCH_BCM_CYGNUS && OF_GPIO
+	default y
+	help
+	  Say yes here to turn on GPIO support for Broadcom Cygnus SoC
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU). All 3 GPIO controllers are
+	  supported by this driver
+
 config GPIO_CLPS711X
 	tristate "CLPS711X GPIO support"
 	depends on ARCH_CLPS711X || COMPILE_TEST
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 81755f1..31eb7e0 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5520)	+= gpio-adp5520.o
 obj-$(CONFIG_GPIO_ADP5588)	+= gpio-adp5588.o
 obj-$(CONFIG_GPIO_AMD8111)	+= gpio-amd8111.o
 obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizona.o
+obj-$(CONFIG_GPIO_BCM_CYGNUS)	+= gpio-bcm-cygnus.o
 obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
 obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
 obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
new file mode 100644
index 0000000..a6a7732
--- /dev/null
+++ b/drivers/gpio/gpio-bcm-cygnus.c
@@ -0,0 +1,613 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/irqchip/chained_irq.h>
+
+#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
+#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
+#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
+#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
+#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
+#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
+#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
+#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
+#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
+#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
+#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
+#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
+
+/* drive strength control for ASIU GPIO */
+#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+
+/* drive strength control for CCM GPIO */
+#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
+
+#define GPIO_BANK_SIZE 0x200
+#define NGPIOS_PER_BANK 32
+#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
+
+#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
+#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
+
+#define GPIO_FLAG_BIT_MASK           0xffff
+#define GPIO_PULL_BIT_SHIFT          16
+#define GPIO_PULL_BIT_MASK           0x3
+
+#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
+#define GPIO_DRV_STRENGTH_BITS       3
+#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
+
+/*
+ * For GPIO internal pull up/down registers
+ */
+enum gpio_pull {
+	GPIO_PULL_NONE = 0,
+	GPIO_PULL_UP,
+	GPIO_PULL_DOWN,
+	GPIO_PULL_INVALID,
+};
+
+/*
+ * GPIO drive strength
+ */
+enum gpio_drv_strength {
+	GPIO_DRV_STRENGTH_2MA = 0,
+	GPIO_DRV_STRENGTH_4MA,
+	GPIO_DRV_STRENGTH_6MA,
+	GPIO_DRV_STRENGTH_8MA,
+	GPIO_DRV_STRENGTH_10MA,
+	GPIO_DRV_STRENGTH_12MA,
+	GPIO_DRV_STRENGTH_14MA,
+	GPIO_DRV_STRENGTH_16MA,
+	GPIO_DRV_STRENGTH_INVALID,
+};
+
+struct cygnus_gpio {
+	struct device *dev;
+	void __iomem *base;
+	void __iomem *io_ctrl;
+	spinlock_t lock;
+	struct gpio_chip gc;
+	unsigned num_banks;
+	int irq;
+	struct irq_domain *irq_domain;
+};
+
+static struct cygnus_gpio *to_cygnus_gpio(struct gpio_chip *gc)
+{
+	return container_of(gc, struct cygnus_gpio, gc);
+}
+
+static u32 cygnus_readl(struct cygnus_gpio *cygnus_gpio, unsigned int offset)
+{
+	return readl(cygnus_gpio->base + offset);
+}
+
+static void cygnus_writel(struct cygnus_gpio *cygnus_gpio,
+			  unsigned int offset, u32 val)
+{
+	writel(val, cygnus_gpio->base + offset);
+}
+
+/**
+ *  cygnus_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
+ *  Cygnus GPIO register
+ *
+ *  @cygnus_gpio: Cygnus GPIO device
+ *  @reg: register offset
+ *  @gpio: GPIO pin
+ *  @set: set or clear. 1 - set; 0 -clear
+ */
+static void cygnus_set_bit(struct cygnus_gpio *cygnus_gpio,
+			   unsigned int reg, unsigned gpio, int set)
+{
+	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val;
+
+	val = cygnus_readl(cygnus_gpio, offset);
+	if (set)
+		val |= BIT(shift);
+	else
+		val &= ~BIT(shift);
+	cygnus_writel(cygnus_gpio, offset, val);
+}
+
+static int cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+
+	return irq_find_mapping(cygnus_gpio->irq_domain, offset);
+}
+
+static void cygnus_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	struct cygnus_gpio *cygnus_gpio;
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int i, bit;
+
+	chained_irq_enter(chip, desc);
+
+	cygnus_gpio = irq_get_handler_data(irq);
+
+	/* go through the entire GPIO banks and handle all interrupts */
+	for (i = 0; i < cygnus_gpio->num_banks; i++) {
+		unsigned long val = cygnus_readl(cygnus_gpio,
+				(i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_MSTAT_OFFSET);
+
+		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
+			unsigned pin = NGPIOS_PER_BANK * i + bit;
+			int child_irq =
+				cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
+
+			/*
+			 * Clear the interrupt before invoking the
+			 * handler, so we do not leave any window
+			 */
+			cygnus_writel(cygnus_gpio, (i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_CLR_OFFSET, BIT(bit));
+
+			generic_handle_irq(child_irq);
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+
+static void cygnus_gpio_irq_ack(struct irq_data *d)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset = CYGNUS_GPIO_REG(gpio,
+			CYGNUS_GPIO_INT_CLR_OFFSET);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val = BIT(shift);
+
+	cygnus_writel(cygnus_gpio, offset, val);
+}
+
+/**
+ *  cygnus_gpio_irq_set_mask - mask/unmask a GPIO interrupt
+ *
+ *  @d: IRQ chip data
+ *  @mask: mask/unmask GPIO interrupt. 0 - mask (disable); 1 - unmask (enable)
+ */
+static void cygnus_gpio_irq_set_mask(struct irq_data *d, int mask)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_MSK_OFFSET, gpio, mask);
+}
+
+static void cygnus_gpio_irq_mask(struct irq_data *d)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_gpio_irq_set_mask(d, 0);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static void cygnus_gpio_irq_unmask(struct irq_data *d)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_gpio_irq_set_mask(d, 1);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	int int_type = 0, dual_edge = 0, edge_lvl = 0;
+	unsigned long flags;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		dual_edge = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		int_type = 1;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		int_type = 1;
+		break;
+
+	default:
+		dev_err(cygnus_gpio->dev, "invalid GPIO IRQ type 0x%x\n",
+				type);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_IN_TYPE_OFFSET, gpio,
+			int_type);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_DE_OFFSET, gpio,
+			dual_edge);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio,
+			edge_lvl);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u set int_type:%d dual_edge:%d edge_lvl:%d\n",
+		gpio, int_type, dual_edge, edge_lvl);
+
+	return 0;
+}
+
+static struct irq_chip cygnus_gpio_irq_chip = {
+	.name = "bcm-cygnus-gpio",
+	.irq_ack = cygnus_gpio_irq_ack,
+	.irq_mask = cygnus_gpio_irq_mask,
+	.irq_unmask = cygnus_gpio_irq_unmask,
+	.irq_set_type = cygnus_gpio_irq_set_type,
+};
+
+static int cygnus_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 0);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u set input\n", gpio);
+
+	return 0;
+}
+
+static int cygnus_gpio_direction_output(struct gpio_chip *gc,
+		unsigned gpio, int value)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 1);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u set output, value:%d\n",
+			gpio, value);
+
+	return 0;
+}
+
+static void cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio,
+		int value)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u set, value:%d\n", gpio, value);
+}
+
+static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	unsigned int offset = CYGNUS_GPIO_REG(gpio,
+			CYGNUS_GPIO_DATA_IN_OFFSET);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val;
+
+	val = cygnus_readl(cygnus_gpio, offset);
+	val = (val >> shift) & 1;
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u get, value:%d\n", gpio, val);
+
+	return val;
+}
+
+static struct lock_class_key gpio_lock_class;
+
+static int cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+			       irq_hw_number_t hwirq)
+{
+	int ret;
+
+	ret = irq_set_chip_data(irq, d->host_data);
+	if (ret < 0)
+		return ret;
+	irq_set_lockdep_class(irq, &gpio_lock_class);
+	irq_set_chip_and_handler(irq, &cygnus_gpio_irq_chip,
+			handle_simple_irq);
+	set_irq_flags(irq, IRQF_VALID);
+
+	return 0;
+}
+
+static void cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static struct irq_domain_ops cygnus_irq_ops = {
+	.map = cygnus_gpio_irq_map,
+	.unmap = cygnus_gpio_irq_unmap,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+#ifdef CONFIG_OF_GPIO
+static void cygnus_gpio_set_pull(struct cygnus_gpio *cygnus_gpio,
+				 unsigned gpio, enum gpio_pull pull)
+{
+	int pullup;
+	unsigned long flags;
+
+	switch (pull) {
+	case GPIO_PULL_UP:
+		pullup = 1;
+		break;
+	case GPIO_PULL_DOWN:
+		pullup = 0;
+		break;
+	case GPIO_PULL_NONE:
+	case GPIO_PULL_INVALID:
+	default:
+		return;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	/* set pull up/down */
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_PAD_RES_OFFSET, gpio, pullup);
+	/* enable pad */
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 1);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u set pullup:%d\n", gpio, pullup);
+}
+
+static void cygnus_gpio_set_strength(struct cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_drv_strength strength)
+{
+	struct device *dev = cygnus_gpio->dev;
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	/* some GPIO controllers do not support drive strength configuration */
+	if (of_find_property(dev->of_node, "no-drv-strength", NULL))
+		return;
+
+	/*
+	 * Some GPIO controllers use a different register block for drive
+	 * strength control
+	 */
+	if (cygnus_gpio->io_ctrl) {
+		base = cygnus_gpio->io_ctrl;
+		offset = CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET;
+	} else {
+		base = cygnus_gpio->base;
+		offset = CYGNUS_GPIO_REG(gpio,
+				CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
+	}
+
+	shift = CYGNUS_GPIO_SHIFT(gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset);
+		val &= ~BIT(shift);
+		val |= ((strength >> i) & 0x1) << shift;
+		writel(val, base + offset);
+		offset += 4;
+	}
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+			"gpio:%u set drive strength:%d\n", gpio, strength);
+}
+
+static int cygnus_gpio_of_xlate(struct gpio_chip *gc,
+		const struct of_phandle_args *gpiospec, u32 *flags)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	enum gpio_pull pull;
+	enum gpio_drv_strength strength;
+
+	if (gc->of_gpio_n_cells < 2)
+		return -EINVAL;
+
+	if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+		return -EINVAL;
+
+	if (gpiospec->args[0] >= gc->ngpio)
+		return -EINVAL;
+
+	pull = (gpiospec->args[1] >> GPIO_PULL_BIT_SHIFT) & GPIO_PULL_BIT_MASK;
+	if (WARN_ON(pull >= GPIO_PULL_INVALID))
+		return -EINVAL;
+
+	strength = (gpiospec->args[1] >> GPIO_DRV_STRENGTH_BIT_SHIFT) &
+		GPIO_DRV_STRENGTH_BIT_MASK;
+
+	if (flags)
+		*flags = gpiospec->args[1] & GPIO_FLAG_BIT_MASK;
+
+	cygnus_gpio_set_pull(cygnus_gpio, gpiospec->args[0], pull);
+	cygnus_gpio_set_strength(cygnus_gpio, gpiospec->args[0], strength);
+
+	return gpiospec->args[0];
+}
+#endif
+
+static const struct of_device_id cygnus_gpio_of_match[] = {
+	{ .compatible = "brcm,cygnus-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cygnus_gpio_of_match);
+
+static int cygnus_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct cygnus_gpio *cygnus_gpio;
+	struct gpio_chip *gc;
+	u32 i, ngpios, gpio_base;
+	int ret;
+
+	cygnus_gpio = devm_kzalloc(dev, sizeof(*cygnus_gpio), GFP_KERNEL);
+	if (!cygnus_gpio)
+		return -ENOMEM;
+
+	cygnus_gpio->dev = dev;
+	platform_set_drvdata(pdev, cygnus_gpio);
+
+	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+		dev_err(&pdev->dev, "missing ngpios DT property\n");
+		return -ENODEV;
+	}
+	cygnus_gpio->num_banks = (ngpios + NGPIOS_PER_BANK - 1) /
+		NGPIOS_PER_BANK;
+
+	if (of_property_read_u32(dev->of_node, "linux,gpio-base",
+				&gpio_base)) {
+		dev_err(&pdev->dev, "missing linux,gpio-base DT property\n");
+		return -ENODEV;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	cygnus_gpio->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(cygnus_gpio->base)) {
+		dev_err(&pdev->dev, "unable to map I/O memory\n");
+		return PTR_ERR(cygnus_gpio->base);
+	}
+
+	/*
+	 * Only certain types of Cygnus GPIO interfaces have I/O control
+	 * registers
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		cygnus_gpio->io_ctrl = devm_ioremap_resource(dev, res);
+		if (IS_ERR(cygnus_gpio->io_ctrl)) {
+			dev_err(&pdev->dev, "unable to map I/O memory\n");
+			return PTR_ERR(cygnus_gpio->io_ctrl);
+		}
+	}
+
+	spin_lock_init(&cygnus_gpio->lock);
+
+	gc = &cygnus_gpio->gc;
+	gc->base = gpio_base;
+	gc->ngpio = ngpios;
+	gc->label = dev_name(dev);
+	gc->dev = dev;
+#ifdef CONFIG_OF_GPIO
+	gc->of_node = dev->of_node;
+	gc->of_gpio_n_cells = 2;
+	gc->of_xlate = cygnus_gpio_of_xlate;
+#endif
+	gc->direction_input = cygnus_gpio_direction_input;
+	gc->direction_output = cygnus_gpio_direction_output;
+	gc->set = cygnus_gpio_set;
+	gc->get = cygnus_gpio_get;
+	gc->to_irq = cygnus_gpio_to_irq;
+
+	ret = gpiochip_add(gc);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "unable to add GPIO chip\n");
+		return ret;
+	}
+
+	/*
+	 * Some of the GPIO interfaces do not have interrupt wired to the main
+	 * processor
+	 */
+	cygnus_gpio->irq = platform_get_irq(pdev, 0);
+	if (cygnus_gpio->irq < 0) {
+		ret = cygnus_gpio->irq;
+		if (ret == -EPROBE_DEFER)
+			goto err_rm_gpiochip;
+
+		dev_info(&pdev->dev, "no interrupt hook\n");
+	}
+
+	cygnus_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
+			gc->ngpio, &cygnus_irq_ops, cygnus_gpio);
+	if (!cygnus_gpio->irq_domain) {
+		dev_err(&pdev->dev, "unable to allocate IRQ domain\n");
+		ret = -ENXIO;
+		goto err_rm_gpiochip;
+	}
+
+	for (i = 0; i < gc->ngpio; i++) {
+		int irq = irq_create_mapping(cygnus_gpio->irq_domain, i);
+
+		irq_set_lockdep_class(irq, &gpio_lock_class);
+		irq_set_chip_data(irq, cygnus_gpio);
+		irq_set_chip_and_handler(irq, &cygnus_gpio_irq_chip,
+				handle_simple_irq);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	irq_set_chained_handler(cygnus_gpio->irq, cygnus_gpio_irq_handler);
+	irq_set_handler_data(cygnus_gpio->irq, cygnus_gpio);
+
+	return 0;
+
+err_rm_gpiochip:
+	gpiochip_remove(gc);
+	return ret;
+}
+
+static struct platform_driver cygnus_gpio_driver = {
+	.driver = {
+		.name = "bcm-cygnus-gpio",
+		.owner = THIS_MODULE,
+		.of_match_table = cygnus_gpio_of_match,
+	},
+	.probe = cygnus_gpio_probe,
+};
+
+module_platform_driver(cygnus_gpio_driver);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

[PATCH v5 3/3] ARM: dts: enable GPIO for Broadcom Cygnus

[Ray Jui]

This enables all 3 GPIO controllers including the ASIU GPIO, the
chipcommonG GPIO, and the ALWAYS-ON GPIO, for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |   33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..35272b7 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,39 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x1800a000 0x50>,
+			<0x0301d164 0x20>;
+		ngpios = <24>;
+		linux,gpio-base = <0>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		linux,gpio-base = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		linux,gpio-base = <146>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-drv-strength;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v3 0/4] Add pinctrl support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial pinctrl (IOMUX) support for the Broadcom
Cygnus SoC. The Cygnus IOMUX controller supports group based mux configuration
and allows certain pins to be muxed to GPIO function individually

Changes from v2:
 - Consolidate all Broadcom pinctrl drivers into drivers/pinctrl/bcm/*
 - Change the Cygnus IOMUX driver to use standard Linux pinctrl subnode
properties such as "function" and "groups" for pinmux configuration, instead
of non-standard properties such as "brcm,function" and "brcm,group"
 - Use real function names like "spi0", "lcd", "key", and etc. instead of HW
specific mux names like "alt1", "alt2", "alt3", and etc.
 - Add suffix "grp" to all group names
 - Add support to allow individual pins to be muxed to GPIO function through
subsystem callbacks "gpio_request_enable" and "gpio_disable_free", and get rid
of all GPIO groups
 - Other minor improvements in the driver

Changes from v1:
 - Fix a typo in device tree binding document

Ray Jui (4):
  pinctrl: bcm: consolidate Broadcom pinctrl drivers
  pinctrl: Broadcom Cygnus pinctrl device tree binding
  pinctrl: cygnus: add initial IOMUX driver support
  ARM: dts: enable IOMUX for Broadcom Cygnus

 .../bindings/pinctrl/brcm,cygnus-pinmux.txt        |  159 +++
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |    6 +
 drivers/pinctrl/Kconfig                            |   19 +-
 drivers/pinctrl/Makefile                           |    4 +-
 drivers/pinctrl/bcm/Kconfig                        |   34 +
 drivers/pinctrl/bcm/Makefile                       |    5 +
 drivers/pinctrl/bcm/pinctrl-bcm281xx.c             | 1455 ++++++++++++++++++++
 drivers/pinctrl/bcm/pinctrl-bcm2835.c              | 1072 ++++++++++++++
 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c           | 1087 +++++++++++++++
 drivers/pinctrl/pinctrl-bcm281xx.c                 | 1455 --------------------
 drivers/pinctrl/pinctrl-bcm2835.c                  | 1072 --------------
 11 files changed, 3821 insertions(+), 2547 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt
 create mode 100644 drivers/pinctrl/bcm/Kconfig
 create mode 100644 drivers/pinctrl/bcm/Makefile
 create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm281xx.c
 create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm2835.c
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
 delete mode 100644 drivers/pinctrl/pinctrl-bcm281xx.c
 delete mode 100644 drivers/pinctrl/pinctrl-bcm2835.c

-- 
1.7.9.5

[PATCH v3 1/4] pinctrl: bcm: consolidate Broadcom pinctrl drivers

[Ray Jui]

Consolidate Broadcom pinctrl drivers into drivers/pinctrl/bcm/*

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 drivers/pinctrl/Kconfig                |   19 +-
 drivers/pinctrl/Makefile               |    4 +-
 drivers/pinctrl/bcm/Kconfig            |   21 +
 drivers/pinctrl/bcm/Makefile           |    4 +
 drivers/pinctrl/bcm/pinctrl-bcm281xx.c | 1455 ++++++++++++++++++++++++++++++++
 drivers/pinctrl/bcm/pinctrl-bcm2835.c  | 1072 +++++++++++++++++++++++
 drivers/pinctrl/pinctrl-bcm281xx.c     | 1455 --------------------------------
 drivers/pinctrl/pinctrl-bcm2835.c      | 1072 -----------------------
 8 files changed, 2555 insertions(+), 2547 deletions(-)
 create mode 100644 drivers/pinctrl/bcm/Kconfig
 create mode 100644 drivers/pinctrl/bcm/Makefile
 create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm281xx.c
 create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm2835.c
 delete mode 100644 drivers/pinctrl/pinctrl-bcm281xx.c
 delete mode 100644 drivers/pinctrl/pinctrl-bcm2835.c

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index d014f22..6cfdad7 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -67,24 +67,6 @@ config PINCTRL_AT91
 	help
 	  Say Y here to enable the at91 pinctrl driver
 
-config PINCTRL_BCM2835
-	bool
-	select PINMUX
-	select PINCONF
-
-config PINCTRL_BCM281XX
-	bool "Broadcom BCM281xx pinctrl driver"
-	depends on OF && (ARCH_BCM_MOBILE || COMPILE_TEST)
-	select PINMUX
-	select PINCONF
-	select GENERIC_PINCONF
-	select REGMAP_MMIO
-	help
-	  Say Y here to support Broadcom BCM281xx pinctrl driver, which is used
-	  for the BCM281xx SoC family, including BCM11130, BCM11140, BCM11351,
-	  BCM28145, and BCM28155 SoCs.  This driver requires the pinctrl
-	  framework.  GPIO is provided by a separate GPIO driver.
-
 config PINCTRL_LANTIQ
 	bool
 	depends on LANTIQ
@@ -191,6 +173,7 @@ config PINCTRL_PALMAS
 	  open drain configuration for the Palmas series devices like
 	  TPS65913, TPS80036 etc.
 
+source "drivers/pinctrl/bcm/Kconfig"
 source "drivers/pinctrl/berlin/Kconfig"
 source "drivers/pinctrl/freescale/Kconfig"
 source "drivers/pinctrl/intel/Kconfig"
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index c030b3d..c018bbf 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -14,8 +14,6 @@ obj-$(CONFIG_PINCTRL_AS3722)	+= pinctrl-as3722.o
 obj-$(CONFIG_PINCTRL_BF54x)	+= pinctrl-adi2-bf54x.o
 obj-$(CONFIG_PINCTRL_BF60x)	+= pinctrl-adi2-bf60x.o
 obj-$(CONFIG_PINCTRL_AT91)	+= pinctrl-at91.o
-obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
-obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
 obj-$(CONFIG_PINCTRL_FALCON)	+= pinctrl-falcon.o
 obj-$(CONFIG_PINCTRL_PALMAS)	+= pinctrl-palmas.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP)	+= pinctrl-rockchip.o
@@ -36,6 +34,8 @@ obj-$(CONFIG_PINCTRL_LANTIQ)	+= pinctrl-lantiq.o
 obj-$(CONFIG_PINCTRL_TB10X)	+= pinctrl-tb10x.o
 obj-$(CONFIG_PINCTRL_ST) 	+= pinctrl-st.o
 
+obj-$(CONFIG_ARCH_BCM)		+= bcm/
+obj-$(CONFIG_ARCH_BCM2835)	+= bcm/
 obj-$(CONFIG_ARCH_BERLIN)	+= berlin/
 obj-y				+= freescale/
 obj-$(CONFIG_X86)		+= intel/
diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
new file mode 100644
index 0000000..bc6d048
--- /dev/null
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -0,0 +1,21 @@
+#
+# Broadcom pinctrl drivers
+#
+
+config PINCTRL_BCM281XX
+	bool "Broadcom BCM281xx pinctrl driver"
+	depends on OF && (ARCH_BCM_MOBILE || COMPILE_TEST)
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select REGMAP_MMIO
+	help
+	  Say Y here to support Broadcom BCM281xx pinctrl driver, which is used
+	  for the BCM281xx SoC family, including BCM11130, BCM11140, BCM11351,
+	  BCM28145, and BCM28155 SoCs.  This driver requires the pinctrl
+	  framework.  GPIO is provided by a separate GPIO driver.
+
+config PINCTRL_BCM2835
+	bool
+	select PINMUX
+	select PINCONF
diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
new file mode 100644
index 0000000..7ba80a3
--- /dev/null
+++ b/drivers/pinctrl/bcm/Makefile
@@ -0,0 +1,4 @@
+# Broadcom pinctrl support
+
+obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
+obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
diff --git a/drivers/pinctrl/bcm/pinctrl-bcm281xx.c b/drivers/pinctrl/bcm/pinctrl-bcm281xx.c
new file mode 100644
index 0000000..73d99076
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-bcm281xx.c
@@ -0,0 +1,1455 @@
+/*
+ * Copyright (C) 2013 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include "../core.h"
+#include "../pinctrl-utils.h"
+
+/* BCM281XX Pin Control Registers Definitions */
+
+/* Function Select bits are the same for all pin control registers */
+#define BCM281XX_PIN_REG_F_SEL_MASK		0x0700
+#define BCM281XX_PIN_REG_F_SEL_SHIFT		8
+
+/* Standard pin register */
+#define BCM281XX_STD_PIN_REG_DRV_STR_MASK	0x0007
+#define BCM281XX_STD_PIN_REG_DRV_STR_SHIFT	0
+#define BCM281XX_STD_PIN_REG_INPUT_DIS_MASK	0x0008
+#define BCM281XX_STD_PIN_REG_INPUT_DIS_SHIFT	3
+#define BCM281XX_STD_PIN_REG_SLEW_MASK		0x0010
+#define BCM281XX_STD_PIN_REG_SLEW_SHIFT		4
+#define BCM281XX_STD_PIN_REG_PULL_UP_MASK	0x0020
+#define BCM281XX_STD_PIN_REG_PULL_UP_SHIFT	5
+#define BCM281XX_STD_PIN_REG_PULL_DN_MASK	0x0040
+#define BCM281XX_STD_PIN_REG_PULL_DN_SHIFT	6
+#define BCM281XX_STD_PIN_REG_HYST_MASK		0x0080
+#define BCM281XX_STD_PIN_REG_HYST_SHIFT		7
+
+/* I2C pin register */
+#define BCM281XX_I2C_PIN_REG_INPUT_DIS_MASK	0x0004
+#define BCM281XX_I2C_PIN_REG_INPUT_DIS_SHIFT	2
+#define BCM281XX_I2C_PIN_REG_SLEW_MASK		0x0008
+#define BCM281XX_I2C_PIN_REG_SLEW_SHIFT		3
+#define BCM281XX_I2C_PIN_REG_PULL_UP_STR_MASK	0x0070
+#define BCM281XX_I2C_PIN_REG_PULL_UP_STR_SHIFT	4
+
+/* HDMI pin register */
+#define BCM281XX_HDMI_PIN_REG_INPUT_DIS_MASK	0x0008
+#define BCM281XX_HDMI_PIN_REG_INPUT_DIS_SHIFT	3
+#define BCM281XX_HDMI_PIN_REG_MODE_MASK		0x0010
+#define BCM281XX_HDMI_PIN_REG_MODE_SHIFT	4
+
+/**
+ * bcm281xx_pin_type - types of pin register
+ */
+enum bcm281xx_pin_type {
+	BCM281XX_PIN_TYPE_UNKNOWN = 0,
+	BCM281XX_PIN_TYPE_STD,
+	BCM281XX_PIN_TYPE_I2C,
+	BCM281XX_PIN_TYPE_HDMI,
+};
+
+static enum bcm281xx_pin_type std_pin = BCM281XX_PIN_TYPE_STD;
+static enum bcm281xx_pin_type i2c_pin = BCM281XX_PIN_TYPE_I2C;
+static enum bcm281xx_pin_type hdmi_pin = BCM281XX_PIN_TYPE_HDMI;
+
+/**
+ * bcm281xx_pin_function- define pin function
+ */
+struct bcm281xx_pin_function {
+	const char *name;
+	const char * const *groups;
+	const unsigned ngroups;
+};
+
+/**
+ * bcm281xx_pinctrl_data - Broadcom-specific pinctrl data
+ * @reg_base - base of pinctrl registers
+ */
+struct bcm281xx_pinctrl_data {
+	void __iomem *reg_base;
+
+	/* List of all pins */
+	const struct pinctrl_pin_desc *pins;
+	const unsigned npins;
+
+	const struct bcm281xx_pin_function *functions;
+	const unsigned nfunctions;
+
+	struct regmap *regmap;
+};
+
+/*
+ * Pin number definition.  The order here must be the same as defined in the
+ * PADCTRLREG block in the RDB.
+ */
+#define BCM281XX_PIN_ADCSYNC		0
+#define BCM281XX_PIN_BAT_RM		1
+#define BCM281XX_PIN_BSC1_SCL		2
+#define BCM281XX_PIN_BSC1_SDA		3
+#define BCM281XX_PIN_BSC2_SCL		4
+#define BCM281XX_PIN_BSC2_SDA		5
+#define BCM281XX_PIN_CLASSGPWR		6
+#define BCM281XX_PIN_CLK_CX8		7
+#define BCM281XX_PIN_CLKOUT_0		8
+#define BCM281XX_PIN_CLKOUT_1		9
+#define BCM281XX_PIN_CLKOUT_2		10
+#define BCM281XX_PIN_CLKOUT_3		11
+#define BCM281XX_PIN_CLKREQ_IN_0	12
+#define BCM281XX_PIN_CLKREQ_IN_1	13
+#define BCM281XX_PIN_CWS_SYS_REQ1	14
+#define BCM281XX_PIN_CWS_SYS_REQ2	15
+#define BCM281XX_PIN_CWS_SYS_REQ3	16
+#define BCM281XX_PIN_DIGMIC1_CLK	17
+#define BCM281XX_PIN_DIGMIC1_DQ		18
+#define BCM281XX_PIN_DIGMIC2_CLK	19
+#define BCM281XX_PIN_DIGMIC2_DQ		20
+#define BCM281XX_PIN_GPEN13		21
+#define BCM281XX_PIN_GPEN14		22
+#define BCM281XX_PIN_GPEN15		23
+#define BCM281XX_PIN_GPIO00		24
+#define BCM281XX_PIN_GPIO01		25
+#define BCM281XX_PIN_GPIO02		26
+#define BCM281XX_PIN_GPIO03		27
+#define BCM281XX_PIN_GPIO04		28
+#define BCM281XX_PIN_GPIO05		29
+#define BCM281XX_PIN_GPIO06		30
+#define BCM281XX_PIN_GPIO07		31
+#define BCM281XX_PIN_GPIO08		32
+#define BCM281XX_PIN_GPIO09		33
+#define BCM281XX_PIN_GPIO10		34
+#define BCM281XX_PIN_GPIO11		35
+#define BCM281XX_PIN_GPIO12		36
+#define BCM281XX_PIN_GPIO13		37
+#define BCM281XX_PIN_GPIO14		38
+#define BCM281XX_PIN_GPS_PABLANK	39
+#define BCM281XX_PIN_GPS_TMARK		40
+#define BCM281XX_PIN_HDMI_SCL		41
+#define BCM281XX_PIN_HDMI_SDA		42
+#define BCM281XX_PIN_IC_DM		43
+#define BCM281XX_PIN_IC_DP		44
+#define BCM281XX_PIN_KP_COL_IP_0	45
+#define BCM281XX_PIN_KP_COL_IP_1	46
+#define BCM281XX_PIN_KP_COL_IP_2	47
+#define BCM281XX_PIN_KP_COL_IP_3	48
+#define BCM281XX_PIN_KP_ROW_OP_0	49
+#define BCM281XX_PIN_KP_ROW_OP_1	50
+#define BCM281XX_PIN_KP_ROW_OP_2	51
+#define BCM281XX_PIN_KP_ROW_OP_3	52
+#define BCM281XX_PIN_LCD_B_0		53
+#define BCM281XX_PIN_LCD_B_1		54
+#define BCM281XX_PIN_LCD_B_2		55
+#define BCM281XX_PIN_LCD_B_3		56
+#define BCM281XX_PIN_LCD_B_4		57
+#define BCM281XX_PIN_LCD_B_5		58
+#define BCM281XX_PIN_LCD_B_6		59
+#define BCM281XX_PIN_LCD_B_7		60
+#define BCM281XX_PIN_LCD_G_0		61
+#define BCM281XX_PIN_LCD_G_1		62
+#define BCM281XX_PIN_LCD_G_2		63
+#define BCM281XX_PIN_LCD_G_3		64
+#define BCM281XX_PIN_LCD_G_4		65
+#define BCM281XX_PIN_LCD_G_5		66
+#define BCM281XX_PIN_LCD_G_6		67
+#define BCM281XX_PIN_LCD_G_7		68
+#define BCM281XX_PIN_LCD_HSYNC		69
+#define BCM281XX_PIN_LCD_OE		70
+#define BCM281XX_PIN_LCD_PCLK		71
+#define BCM281XX_PIN_LCD_R_0		72
+#define BCM281XX_PIN_LCD_R_1		73
+#define BCM281XX_PIN_LCD_R_2		74
+#define BCM281XX_PIN_LCD_R_3		75
+#define BCM281XX_PIN_LCD_R_4		76
+#define BCM281XX_PIN_LCD_R_5		77
+#define BCM281XX_PIN_LCD_R_6		78
+#define BCM281XX_PIN_LCD_R_7		79
+#define BCM281XX_PIN_LCD_VSYNC		80
+#define BCM281XX_PIN_MDMGPIO0		81
+#define BCM281XX_PIN_MDMGPIO1		82
+#define BCM281XX_PIN_MDMGPIO2		83
+#define BCM281XX_PIN_MDMGPIO3		84
+#define BCM281XX_PIN_MDMGPIO4		85
+#define BCM281XX_PIN_MDMGPIO5		86
+#define BCM281XX_PIN_MDMGPIO6		87
+#define BCM281XX_PIN_MDMGPIO7		88
+#define BCM281XX_PIN_MDMGPIO8		89
+#define BCM281XX_PIN_MPHI_DATA_0	90
+#define BCM281XX_PIN_MPHI_DATA_1	91
+#define BCM281XX_PIN_MPHI_DATA_2	92
+#define BCM281XX_PIN_MPHI_DATA_3	93
+#define BCM281XX_PIN_MPHI_DATA_4	94
+#define BCM281XX_PIN_MPHI_DATA_5	95
+#define BCM281XX_PIN_MPHI_DATA_6	96
+#define BCM281XX_PIN_MPHI_DATA_7	97
+#define BCM281XX_PIN_MPHI_DATA_8	98
+#define BCM281XX_PIN_MPHI_DATA_9	99
+#define BCM281XX_PIN_MPHI_DATA_10	100
+#define BCM281XX_PIN_MPHI_DATA_11	101
+#define BCM281XX_PIN_MPHI_DATA_12	102
+#define BCM281XX_PIN_MPHI_DATA_13	103
+#define BCM281XX_PIN_MPHI_DATA_14	104
+#define BCM281XX_PIN_MPHI_DATA_15	105
+#define BCM281XX_PIN_MPHI_HA0		106
+#define BCM281XX_PIN_MPHI_HAT0		107
+#define BCM281XX_PIN_MPHI_HAT1		108
+#define BCM281XX_PIN_MPHI_HCE0_N	109
+#define BCM281XX_PIN_MPHI_HCE1_N	110
+#define BCM281XX_PIN_MPHI_HRD_N		111
+#define BCM281XX_PIN_MPHI_HWR_N		112
+#define BCM281XX_PIN_MPHI_RUN0		113
+#define BCM281XX_PIN_MPHI_RUN1		114
+#define BCM281XX_PIN_MTX_SCAN_CLK	115
+#define BCM281XX_PIN_MTX_SCAN_DATA	116
+#define BCM281XX_PIN_NAND_AD_0		117
+#define BCM281XX_PIN_NAND_AD_1		118
+#define BCM281XX_PIN_NAND_AD_2		119
+#define BCM281XX_PIN_NAND_AD_3		120
+#define BCM281XX_PIN_NAND_AD_4		121
+#define BCM281XX_PIN_NAND_AD_5		122
+#define BCM281XX_PIN_NAND_AD_6		123
+#define BCM281XX_PIN_NAND_AD_7		124
+#define BCM281XX_PIN_NAND_ALE		125
+#define BCM281XX_PIN_NAND_CEN_0		126
+#define BCM281XX_PIN_NAND_CEN_1		127
+#define BCM281XX_PIN_NAND_CLE		128
+#define BCM281XX_PIN_NAND_OEN		129
+#define BCM281XX_PIN_NAND_RDY_0		130
+#define BCM281XX_PIN_NAND_RDY_1		131
+#define BCM281XX_PIN_NAND_WEN		132
+#define BCM281XX_PIN_NAND_WP		133
+#define BCM281XX_PIN_PC1		134
+#define BCM281XX_PIN_PC2		135
+#define BCM281XX_PIN_PMU_INT		136
+#define BCM281XX_PIN_PMU_SCL		137
+#define BCM281XX_PIN_PMU_SDA		138
+#define BCM281XX_PIN_RFST2G_MTSLOTEN3G	139
+#define BCM281XX_PIN_RGMII_0_RX_CTL	140
+#define BCM281XX_PIN_RGMII_0_RXC	141
+#define BCM281XX_PIN_RGMII_0_RXD_0	142
+#define BCM281XX_PIN_RGMII_0_RXD_1	143
+#define BCM281XX_PIN_RGMII_0_RXD_2	144
+#define BCM281XX_PIN_RGMII_0_RXD_3	145
+#define BCM281XX_PIN_RGMII_0_TX_CTL	146
+#define BCM281XX_PIN_RGMII_0_TXC	147
+#define BCM281XX_PIN_RGMII_0_TXD_0	148
+#define BCM281XX_PIN_RGMII_0_TXD_1	149
+#define BCM281XX_PIN_RGMII_0_TXD_2	150
+#define BCM281XX_PIN_RGMII_0_TXD_3	151
+#define BCM281XX_PIN_RGMII_1_RX_CTL	152
+#define BCM281XX_PIN_RGMII_1_RXC	153
+#define BCM281XX_PIN_RGMII_1_RXD_0	154
+#define BCM281XX_PIN_RGMII_1_RXD_1	155
+#define BCM281XX_PIN_RGMII_1_RXD_2	156
+#define BCM281XX_PIN_RGMII_1_RXD_3	157
+#define BCM281XX_PIN_RGMII_1_TX_CTL	158
+#define BCM281XX_PIN_RGMII_1_TXC	159
+#define BCM281XX_PIN_RGMII_1_TXD_0	160
+#define BCM281XX_PIN_RGMII_1_TXD_1	161
+#define BCM281XX_PIN_RGMII_1_TXD_2	162
+#define BCM281XX_PIN_RGMII_1_TXD_3	163
+#define BCM281XX_PIN_RGMII_GPIO_0	164
+#define BCM281XX_PIN_RGMII_GPIO_1	165
+#define BCM281XX_PIN_RGMII_GPIO_2	166
+#define BCM281XX_PIN_RGMII_GPIO_3	167
+#define BCM281XX_PIN_RTXDATA2G_TXDATA3G1	168
+#define BCM281XX_PIN_RTXEN2G_TXDATA3G2	169
+#define BCM281XX_PIN_RXDATA3G0		170
+#define BCM281XX_PIN_RXDATA3G1		171
+#define BCM281XX_PIN_RXDATA3G2		172
+#define BCM281XX_PIN_SDIO1_CLK		173
+#define BCM281XX_PIN_SDIO1_CMD		174
+#define BCM281XX_PIN_SDIO1_DATA_0	175
+#define BCM281XX_PIN_SDIO1_DATA_1	176
+#define BCM281XX_PIN_SDIO1_DATA_2	177
+#define BCM281XX_PIN_SDIO1_DATA_3	178
+#define BCM281XX_PIN_SDIO4_CLK		179
+#define BCM281XX_PIN_SDIO4_CMD		180
+#define BCM281XX_PIN_SDIO4_DATA_0	181
+#define BCM281XX_PIN_SDIO4_DATA_1	182
+#define BCM281XX_PIN_SDIO4_DATA_2	183
+#define BCM281XX_PIN_SDIO4_DATA_3	184
+#define BCM281XX_PIN_SIM_CLK		185
+#define BCM281XX_PIN_SIM_DATA		186
+#define BCM281XX_PIN_SIM_DET		187
+#define BCM281XX_PIN_SIM_RESETN		188
+#define BCM281XX_PIN_SIM2_CLK		189
+#define BCM281XX_PIN_SIM2_DATA		190
+#define BCM281XX_PIN_SIM2_DET		191
+#define BCM281XX_PIN_SIM2_RESETN	192
+#define BCM281XX_PIN_SRI_C		193
+#define BCM281XX_PIN_SRI_D		194
+#define BCM281XX_PIN_SRI_E		195
+#define BCM281XX_PIN_SSP_EXTCLK		196
+#define BCM281XX_PIN_SSP0_CLK		197
+#define BCM281XX_PIN_SSP0_FS		198
+#define BCM281XX_PIN_SSP0_RXD		199
+#define BCM281XX_PIN_SSP0_TXD		200
+#define BCM281XX_PIN_SSP2_CLK		201
+#define BCM281XX_PIN_SSP2_FS_0		202
+#define BCM281XX_PIN_SSP2_FS_1		203
+#define BCM281XX_PIN_SSP2_FS_2		204
+#define BCM281XX_PIN_SSP2_FS_3		205
+#define BCM281XX_PIN_SSP2_RXD_0		206
+#define BCM281XX_PIN_SSP2_RXD_1		207
+#define BCM281XX_PIN_SSP2_TXD_0		208
+#define BCM281XX_PIN_SSP2_TXD_1		209
+#define BCM281XX_PIN_SSP3_CLK		210
+#define BCM281XX_PIN_SSP3_FS		211
+#define BCM281XX_PIN_SSP3_RXD		212
+#define BCM281XX_PIN_SSP3_TXD		213
+#define BCM281XX_PIN_SSP4_CLK		214
+#define BCM281XX_PIN_SSP4_FS		215
+#define BCM281XX_PIN_SSP4_RXD		216
+#define BCM281XX_PIN_SSP4_TXD		217
+#define BCM281XX_PIN_SSP5_CLK		218
+#define BCM281XX_PIN_SSP5_FS		219
+#define BCM281XX_PIN_SSP5_RXD		220
+#define BCM281XX_PIN_SSP5_TXD		221
+#define BCM281XX_PIN_SSP6_CLK		222
+#define BCM281XX_PIN_SSP6_FS		223
+#define BCM281XX_PIN_SSP6_RXD		224
+#define BCM281XX_PIN_SSP6_TXD		225
+#define BCM281XX_PIN_STAT_1		226
+#define BCM281XX_PIN_STAT_2		227
+#define BCM281XX_PIN_SYSCLKEN		228
+#define BCM281XX_PIN_TRACECLK		229
+#define BCM281XX_PIN_TRACEDT00		230
+#define BCM281XX_PIN_TRACEDT01		231
+#define BCM281XX_PIN_TRACEDT02		232
+#define BCM281XX_PIN_TRACEDT03		233
+#define BCM281XX_PIN_TRACEDT04		234
+#define BCM281XX_PIN_TRACEDT05		235
+#define BCM281XX_PIN_TRACEDT06		236
+#define BCM281XX_PIN_TRACEDT07		237
+#define BCM281XX_PIN_TRACEDT08		238
+#define BCM281XX_PIN_TRACEDT09		239
+#define BCM281XX_PIN_TRACEDT10		240
+#define BCM281XX_PIN_TRACEDT11		241
+#define BCM281XX_PIN_TRACEDT12		242
+#define BCM281XX_PIN_TRACEDT13		243
+#define BCM281XX_PIN_TRACEDT14		244
+#define BCM281XX_PIN_TRACEDT15		245
+#define BCM281XX_PIN_TXDATA3G0		246
+#define BCM281XX_PIN_TXPWRIND		247
+#define BCM281XX_PIN_UARTB1_UCTS	248
+#define BCM281XX_PIN_UARTB1_URTS	249
+#define BCM281XX_PIN_UARTB1_URXD	250
+#define BCM281XX_PIN_UARTB1_UTXD	251
+#define BCM281XX_PIN_UARTB2_URXD	252
+#define BCM281XX_PIN_UARTB2_UTXD	253
+#define BCM281XX_PIN_UARTB3_UCTS	254
+#define BCM281XX_PIN_UARTB3_URTS	255
+#define BCM281XX_PIN_UARTB3_URXD	256
+#define BCM281XX_PIN_UARTB3_UTXD	257
+#define BCM281XX_PIN_UARTB4_UCTS	258
+#define BCM281XX_PIN_UARTB4_URTS	259
+#define BCM281XX_PIN_UARTB4_URXD	260
+#define BCM281XX_PIN_UARTB4_UTXD	261
+#define BCM281XX_PIN_VC_CAM1_SCL	262
+#define BCM281XX_PIN_VC_CAM1_SDA	263
+#define BCM281XX_PIN_VC_CAM2_SCL	264
+#define BCM281XX_PIN_VC_CAM2_SDA	265
+#define BCM281XX_PIN_VC_CAM3_SCL	266
+#define BCM281XX_PIN_VC_CAM3_SDA	267
+
+#define BCM281XX_PIN_DESC(a, b, c) \
+	{ .number = a, .name = b, .drv_data = &c##_pin }
+
+/*
+ * Pin description definition.  The order here must be the same as defined in
+ * the PADCTRLREG block in the RDB, since the pin number is used as an index
+ * into this array.
+ */
+static const struct pinctrl_pin_desc bcm281xx_pinctrl_pins[] = {
+	BCM281XX_PIN_DESC(BCM281XX_PIN_ADCSYNC, "adcsync", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BAT_RM, "bat_rm", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC1_SCL, "bsc1_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC1_SDA, "bsc1_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC2_SCL, "bsc2_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC2_SDA, "bsc2_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLASSGPWR, "classgpwr", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLK_CX8, "clk_cx8", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_0, "clkout_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_1, "clkout_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_2, "clkout_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_3, "clkout_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKREQ_IN_0, "clkreq_in_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKREQ_IN_1, "clkreq_in_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ1, "cws_sys_req1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ2, "cws_sys_req2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ3, "cws_sys_req3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC1_CLK, "digmic1_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC1_DQ, "digmic1_dq", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC2_CLK, "digmic2_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC2_DQ, "digmic2_dq", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN13, "gpen13", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN14, "gpen14", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN15, "gpen15", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO00, "gpio00", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO01, "gpio01", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO02, "gpio02", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO03, "gpio03", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO04, "gpio04", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO05, "gpio05", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO06, "gpio06", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO07, "gpio07", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO08, "gpio08", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO09, "gpio09", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO10, "gpio10", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO11, "gpio11", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO12, "gpio12", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO13, "gpio13", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO14, "gpio14", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPS_PABLANK, "gps_pablank", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPS_TMARK, "gps_tmark", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_HDMI_SCL, "hdmi_scl", hdmi),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_HDMI_SDA, "hdmi_sda", hdmi),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_IC_DM, "ic_dm", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_IC_DP, "ic_dp", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_0, "kp_col_ip_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_1, "kp_col_ip_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_2, "kp_col_ip_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_3, "kp_col_ip_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_0, "kp_row_op_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_1, "kp_row_op_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_2, "kp_row_op_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_3, "kp_row_op_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_0, "lcd_b_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_1, "lcd_b_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_2, "lcd_b_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_3, "lcd_b_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_4, "lcd_b_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_5, "lcd_b_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_6, "lcd_b_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_7, "lcd_b_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_0, "lcd_g_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_1, "lcd_g_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_2, "lcd_g_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_3, "lcd_g_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_4, "lcd_g_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_5, "lcd_g_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_6, "lcd_g_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_7, "lcd_g_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_HSYNC, "lcd_hsync", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_OE, "lcd_oe", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_PCLK, "lcd_pclk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_0, "lcd_r_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_1, "lcd_r_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_2, "lcd_r_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_3, "lcd_r_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_4, "lcd_r_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_5, "lcd_r_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_6, "lcd_r_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_7, "lcd_r_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_VSYNC, "lcd_vsync", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO0, "mdmgpio0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO1, "mdmgpio1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO2, "mdmgpio2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO3, "mdmgpio3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO4, "mdmgpio4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO5, "mdmgpio5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO6, "mdmgpio6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO7, "mdmgpio7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO8, "mdmgpio8", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_0, "mphi_data_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_1, "mphi_data_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_2, "mphi_data_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_3, "mphi_data_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_4, "mphi_data_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_5, "mphi_data_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_6, "mphi_data_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_7, "mphi_data_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_8, "mphi_data_8", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_9, "mphi_data_9", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_10, "mphi_data_10", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_11, "mphi_data_11", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_12, "mphi_data_12", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_13, "mphi_data_13", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_14, "mphi_data_14", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_15, "mphi_data_15", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HA0, "mphi_ha0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HAT0, "mphi_hat0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HAT1, "mphi_hat1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HCE0_N, "mphi_hce0_n", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HCE1_N, "mphi_hce1_n", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HRD_N, "mphi_hrd_n", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HWR_N, "mphi_hwr_n", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_RUN0, "mphi_run0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_RUN1, "mphi_run1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MTX_SCAN_CLK, "mtx_scan_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MTX_SCAN_DATA, "mtx_scan_data", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_0, "nand_ad_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_1, "nand_ad_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_2, "nand_ad_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_3, "nand_ad_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_4, "nand_ad_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_5, "nand_ad_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_6, "nand_ad_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_7, "nand_ad_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_ALE, "nand_ale", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CEN_0, "nand_cen_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CEN_1, "nand_cen_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CLE, "nand_cle", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_OEN, "nand_oen", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_RDY_0, "nand_rdy_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_RDY_1, "nand_rdy_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_WEN, "nand_wen", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_WP, "nand_wp", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PC1, "pc1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PC2, "pc2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_INT, "pmu_int", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_SCL, "pmu_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_SDA, "pmu_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RFST2G_MTSLOTEN3G, "rfst2g_mtsloten3g",
+		std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RX_CTL, "rgmii_0_rx_ctl", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXC, "rgmii_0_rxc", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_0, "rgmii_0_rxd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_1, "rgmii_0_rxd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_2, "rgmii_0_rxd_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_3, "rgmii_0_rxd_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TX_CTL, "rgmii_0_tx_ctl", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXC, "rgmii_0_txc", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_0, "rgmii_0_txd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_1, "rgmii_0_txd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_2, "rgmii_0_txd_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_3, "rgmii_0_txd_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RX_CTL, "rgmii_1_rx_ctl", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXC, "rgmii_1_rxc", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_0, "rgmii_1_rxd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_1, "rgmii_1_rxd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_2, "rgmii_1_rxd_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_3, "rgmii_1_rxd_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TX_CTL, "rgmii_1_tx_ctl", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXC, "rgmii_1_txc", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_0, "rgmii_1_txd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_1, "rgmii_1_txd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_2, "rgmii_1_txd_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_3, "rgmii_1_txd_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_0, "rgmii_gpio_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_1, "rgmii_gpio_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_2, "rgmii_gpio_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_3, "rgmii_gpio_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RTXDATA2G_TXDATA3G1,
+		"rtxdata2g_txdata3g1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RTXEN2G_TXDATA3G2, "rtxen2g_txdata3g2",
+		std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G0, "rxdata3g0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G1, "rxdata3g1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G2, "rxdata3g2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_CLK, "sdio1_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_CMD, "sdio1_cmd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_0, "sdio1_data_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_1, "sdio1_data_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_2, "sdio1_data_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_3, "sdio1_data_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_CLK, "sdio4_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_CMD, "sdio4_cmd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_0, "sdio4_data_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_1, "sdio4_data_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_2, "sdio4_data_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_3, "sdio4_data_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_CLK, "sim_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_DATA, "sim_data", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_DET, "sim_det", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_RESETN, "sim_resetn", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_CLK, "sim2_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_DATA, "sim2_data", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_DET, "sim2_det", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_RESETN, "sim2_resetn", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_C, "sri_c", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_D, "sri_d", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_E, "sri_e", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP_EXTCLK, "ssp_extclk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_CLK, "ssp0_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_FS, "ssp0_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_RXD, "ssp0_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_TXD, "ssp0_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_CLK, "ssp2_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_0, "ssp2_fs_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_1, "ssp2_fs_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_2, "ssp2_fs_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_3, "ssp2_fs_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_RXD_0, "ssp2_rxd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_RXD_1, "ssp2_rxd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_TXD_0, "ssp2_txd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_TXD_1, "ssp2_txd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_CLK, "ssp3_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_FS, "ssp3_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_RXD, "ssp3_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_TXD, "ssp3_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_CLK, "ssp4_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_FS, "ssp4_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_RXD, "ssp4_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_TXD, "ssp4_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_CLK, "ssp5_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_FS, "ssp5_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_RXD, "ssp5_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_TXD, "ssp5_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_CLK, "ssp6_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_FS, "ssp6_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_RXD, "ssp6_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_TXD, "ssp6_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_STAT_1, "stat_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_STAT_2, "stat_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SYSCLKEN, "sysclken", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACECLK, "traceclk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT00, "tracedt00", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT01, "tracedt01", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT02, "tracedt02", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT03, "tracedt03", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT04, "tracedt04", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT05, "tracedt05", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT06, "tracedt06", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT07, "tracedt07", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT08, "tracedt08", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT09, "tracedt09", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT10, "tracedt10", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT11, "tracedt11", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT12, "tracedt12", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT13, "tracedt13", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT14, "tracedt14", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT15, "tracedt15", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TXDATA3G0, "txdata3g0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TXPWRIND, "txpwrind", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_UCTS, "uartb1_ucts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_URTS, "uartb1_urts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_URXD, "uartb1_urxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_UTXD, "uartb1_utxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB2_URXD, "uartb2_urxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB2_UTXD, "uartb2_utxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_UCTS, "uartb3_ucts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_URTS, "uartb3_urts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_URXD, "uartb3_urxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_UTXD, "uartb3_utxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_UCTS, "uartb4_ucts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_URTS, "uartb4_urts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_URXD, "uartb4_urxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_UTXD, "uartb4_utxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM1_SCL, "vc_cam1_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM1_SDA, "vc_cam1_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM2_SCL, "vc_cam2_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM2_SDA, "vc_cam2_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM3_SCL, "vc_cam3_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM3_SDA, "vc_cam3_sda", i2c),
+};
+
+static const char * const bcm281xx_alt_groups[] = {
+	"adcsync",
+	"bat_rm",
+	"bsc1_scl",
+	"bsc1_sda",
+	"bsc2_scl",
+	"bsc2_sda",
+	"classgpwr",
+	"clk_cx8",
+	"clkout_0",
+	"clkout_1",
+	"clkout_2",
+	"clkout_3",
+	"clkreq_in_0",
+	"clkreq_in_1",
+	"cws_sys_req1",
+	"cws_sys_req2",
+	"cws_sys_req3",
+	"digmic1_clk",
+	"digmic1_dq",
+	"digmic2_clk",
+	"digmic2_dq",
+	"gpen13",
+	"gpen14",
+	"gpen15",
+	"gpio00",
+	"gpio01",
+	"gpio02",
+	"gpio03",
+	"gpio04",
+	"gpio05",
+	"gpio06",
+	"gpio07",
+	"gpio08",
+	"gpio09",
+	"gpio10",
+	"gpio11",
+	"gpio12",
+	"gpio13",
+	"gpio14",
+	"gps_pablank",
+	"gps_tmark",
+	"hdmi_scl",
+	"hdmi_sda",
+	"ic_dm",
+	"ic_dp",
+	"kp_col_ip_0",
+	"kp_col_ip_1",
+	"kp_col_ip_2",
+	"kp_col_ip_3",
+	"kp_row_op_0",
+	"kp_row_op_1",
+	"kp_row_op_2",
+	"kp_row_op_3",
+	"lcd_b_0",
+	"lcd_b_1",
+	"lcd_b_2",
+	"lcd_b_3",
+	"lcd_b_4",
+	"lcd_b_5",
+	"lcd_b_6",
+	"lcd_b_7",
+	"lcd_g_0",
+	"lcd_g_1",
+	"lcd_g_2",
+	"lcd_g_3",
+	"lcd_g_4",
+	"lcd_g_5",
+	"lcd_g_6",
+	"lcd_g_7",
+	"lcd_hsync",
+	"lcd_oe",
+	"lcd_pclk",
+	"lcd_r_0",
+	"lcd_r_1",
+	"lcd_r_2",
+	"lcd_r_3",
+	"lcd_r_4",
+	"lcd_r_5",
+	"lcd_r_6",
+	"lcd_r_7",
+	"lcd_vsync",
+	"mdmgpio0",
+	"mdmgpio1",
+	"mdmgpio2",
+	"mdmgpio3",
+	"mdmgpio4",
+	"mdmgpio5",
+	"mdmgpio6",
+	"mdmgpio7",
+	"mdmgpio8",
+	"mphi_data_0",
+	"mphi_data_1",
+	"mphi_data_2",
+	"mphi_data_3",
+	"mphi_data_4",
+	"mphi_data_5",
+	"mphi_data_6",
+	"mphi_data_7",
+	"mphi_data_8",
+	"mphi_data_9",
+	"mphi_data_10",
+	"mphi_data_11",
+	"mphi_data_12",
+	"mphi_data_13",
+	"mphi_data_14",
+	"mphi_data_15",
+	"mphi_ha0",
+	"mphi_hat0",
+	"mphi_hat1",
+	"mphi_hce0_n",
+	"mphi_hce1_n",
+	"mphi_hrd_n",
+	"mphi_hwr_n",
+	"mphi_run0",
+	"mphi_run1",
+	"mtx_scan_clk",
+	"mtx_scan_data",
+	"nand_ad_0",
+	"nand_ad_1",
+	"nand_ad_2",
+	"nand_ad_3",
+	"nand_ad_4",
+	"nand_ad_5",
+	"nand_ad_6",
+	"nand_ad_7",
+	"nand_ale",
+	"nand_cen_0",
+	"nand_cen_1",
+	"nand_cle",
+	"nand_oen",
+	"nand_rdy_0",
+	"nand_rdy_1",
+	"nand_wen",
+	"nand_wp",
+	"pc1",
+	"pc2",
+	"pmu_int",
+	"pmu_scl",
+	"pmu_sda",
+	"rfst2g_mtsloten3g",
+	"rgmii_0_rx_ctl",
+	"rgmii_0_rxc",
+	"rgmii_0_rxd_0",
+	"rgmii_0_rxd_1",
+	"rgmii_0_rxd_2",
+	"rgmii_0_rxd_3",
+	"rgmii_0_tx_ctl",
+	"rgmii_0_txc",
+	"rgmii_0_txd_0",
+	"rgmii_0_txd_1",
+	"rgmii_0_txd_2",
+	"rgmii_0_txd_3",
+	"rgmii_1_rx_ctl",
+	"rgmii_1_rxc",
+	"rgmii_1_rxd_0",
+	"rgmii_1_rxd_1",
+	"rgmii_1_rxd_2",
+	"rgmii_1_rxd_3",
+	"rgmii_1_tx_ctl",
+	"rgmii_1_txc",
+	"rgmii_1_txd_0",
+	"rgmii_1_txd_1",
+	"rgmii_1_txd_2",
+	"rgmii_1_txd_3",
+	"rgmii_gpio_0",
+	"rgmii_gpio_1",
+	"rgmii_gpio_2",
+	"rgmii_gpio_3",
+	"rtxdata2g_txdata3g1",
+	"rtxen2g_txdata3g2",
+	"rxdata3g0",
+	"rxdata3g1",
+	"rxdata3g2",
+	"sdio1_clk",
+	"sdio1_cmd",
+	"sdio1_data_0",
+	"sdio1_data_1",
+	"sdio1_data_2",
+	"sdio1_data_3",
+	"sdio4_clk",
+	"sdio4_cmd",
+	"sdio4_data_0",
+	"sdio4_data_1",
+	"sdio4_data_2",
+	"sdio4_data_3",
+	"sim_clk",
+	"sim_data",
+	"sim_det",
+	"sim_resetn",
+	"sim2_clk",
+	"sim2_data",
+	"sim2_det",
+	"sim2_resetn",
+	"sri_c",
+	"sri_d",
+	"sri_e",
+	"ssp_extclk",
+	"ssp0_clk",
+	"ssp0_fs",
+	"ssp0_rxd",
+	"ssp0_txd",
+	"ssp2_clk",
+	"ssp2_fs_0",
+	"ssp2_fs_1",
+	"ssp2_fs_2",
+	"ssp2_fs_3",
+	"ssp2_rxd_0",
+	"ssp2_rxd_1",
+	"ssp2_txd_0",
+	"ssp2_txd_1",
+	"ssp3_clk",
+	"ssp3_fs",
+	"ssp3_rxd",
+	"ssp3_txd",
+	"ssp4_clk",
+	"ssp4_fs",
+	"ssp4_rxd",
+	"ssp4_txd",
+	"ssp5_clk",
+	"ssp5_fs",
+	"ssp5_rxd",
+	"ssp5_txd",
+	"ssp6_clk",
+	"ssp6_fs",
+	"ssp6_rxd",
+	"ssp6_txd",
+	"stat_1",
+	"stat_2",
+	"sysclken",
+	"traceclk",
+	"tracedt00",
+	"tracedt01",
+	"tracedt02",
+	"tracedt03",
+	"tracedt04",
+	"tracedt05",
+	"tracedt06",
+	"tracedt07",
+	"tracedt08",
+	"tracedt09",
+	"tracedt10",
+	"tracedt11",
+	"tracedt12",
+	"tracedt13",
+	"tracedt14",
+	"tracedt15",
+	"txdata3g0",
+	"txpwrind",
+	"uartb1_ucts",
+	"uartb1_urts",
+	"uartb1_urxd",
+	"uartb1_utxd",
+	"uartb2_urxd",
+	"uartb2_utxd",
+	"uartb3_ucts",
+	"uartb3_urts",
+	"uartb3_urxd",
+	"uartb3_utxd",
+	"uartb4_ucts",
+	"uartb4_urts",
+	"uartb4_urxd",
+	"uartb4_utxd",
+	"vc_cam1_scl",
+	"vc_cam1_sda",
+	"vc_cam2_scl",
+	"vc_cam2_sda",
+	"vc_cam3_scl",
+	"vc_cam3_sda",
+};
+
+/* Every pin can implement all ALT1-ALT4 functions */
+#define BCM281XX_PIN_FUNCTION(fcn_name)			\
+{							\
+	.name = #fcn_name,				\
+	.groups = bcm281xx_alt_groups,			\
+	.ngroups = ARRAY_SIZE(bcm281xx_alt_groups),	\
+}
+
+static const struct bcm281xx_pin_function bcm281xx_functions[] = {
+	BCM281XX_PIN_FUNCTION(alt1),
+	BCM281XX_PIN_FUNCTION(alt2),
+	BCM281XX_PIN_FUNCTION(alt3),
+	BCM281XX_PIN_FUNCTION(alt4),
+};
+
+static struct bcm281xx_pinctrl_data bcm281xx_pinctrl = {
+	.pins = bcm281xx_pinctrl_pins,
+	.npins = ARRAY_SIZE(bcm281xx_pinctrl_pins),
+	.functions = bcm281xx_functions,
+	.nfunctions = ARRAY_SIZE(bcm281xx_functions),
+};
+
+static inline enum bcm281xx_pin_type pin_type_get(struct pinctrl_dev *pctldev,
+						  unsigned pin)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	if (pin >= pdata->npins)
+		return BCM281XX_PIN_TYPE_UNKNOWN;
+
+	return *(enum bcm281xx_pin_type *)(pdata->pins[pin].drv_data);
+}
+
+#define BCM281XX_PIN_SHIFT(type, param) \
+	(BCM281XX_ ## type ## _PIN_REG_ ## param ## _SHIFT)
+
+#define BCM281XX_PIN_MASK(type, param) \
+	(BCM281XX_ ## type ## _PIN_REG_ ## param ## _MASK)
+
+/*
+ * This helper function is used to build up the value and mask used to write to
+ * a pin register, but does not actually write to the register.
+ */
+static inline void bcm281xx_pin_update(u32 *reg_val, u32 *reg_mask,
+				       u32 param_val, u32 param_shift,
+				       u32 param_mask)
+{
+	*reg_val &= ~param_mask;
+	*reg_val |= (param_val << param_shift) & param_mask;
+	*reg_mask |= param_mask;
+}
+
+static struct regmap_config bcm281xx_pinctrl_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = BCM281XX_PIN_VC_CAM3_SDA,
+};
+
+static int bcm281xx_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	return pdata->npins;
+}
+
+static const char *bcm281xx_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+						   unsigned group)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	return pdata->pins[group].name;
+}
+
+static int bcm281xx_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+					   unsigned group,
+					   const unsigned **pins,
+					   unsigned *num_pins)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	*pins = &pdata->pins[group].number;
+	*num_pins = 1;
+
+	return 0;
+}
+
+static void bcm281xx_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
+					  struct seq_file *s,
+					  unsigned offset)
+{
+	seq_printf(s, " %s", dev_name(pctldev->dev));
+}
+
+static struct pinctrl_ops bcm281xx_pinctrl_ops = {
+	.get_groups_count = bcm281xx_pinctrl_get_groups_count,
+	.get_group_name = bcm281xx_pinctrl_get_group_name,
+	.get_group_pins = bcm281xx_pinctrl_get_group_pins,
+	.pin_dbg_show = bcm281xx_pinctrl_pin_dbg_show,
+	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int bcm281xx_pinctrl_get_fcns_count(struct pinctrl_dev *pctldev)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	return pdata->nfunctions;
+}
+
+static const char *bcm281xx_pinctrl_get_fcn_name(struct pinctrl_dev *pctldev,
+						 unsigned function)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	return pdata->functions[function].name;
+}
+
+static int bcm281xx_pinctrl_get_fcn_groups(struct pinctrl_dev *pctldev,
+					   unsigned function,
+					   const char * const **groups,
+					   unsigned * const num_groups)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	*groups = pdata->functions[function].groups;
+	*num_groups = pdata->functions[function].ngroups;
+
+	return 0;
+}
+
+static int bcm281xx_pinmux_set(struct pinctrl_dev *pctldev,
+			       unsigned function,
+			       unsigned group)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	const struct bcm281xx_pin_function *f = &pdata->functions[function];
+	u32 offset = 4 * pdata->pins[group].number;
+	int rc = 0;
+
+	dev_dbg(pctldev->dev,
+		"%s(): Enable function %s (%d) of pin %s (%d) @offset 0x%x.\n",
+		__func__, f->name, function, pdata->pins[group].name,
+		pdata->pins[group].number, offset);
+
+	rc = regmap_update_bits(pdata->regmap, offset,
+		BCM281XX_PIN_REG_F_SEL_MASK,
+		function << BCM281XX_PIN_REG_F_SEL_SHIFT);
+	if (rc)
+		dev_err(pctldev->dev,
+			"Error updating register for pin %s (%d).\n",
+			pdata->pins[group].name, pdata->pins[group].number);
+
+	return rc;
+}
+
+static struct pinmux_ops bcm281xx_pinctrl_pinmux_ops = {
+	.get_functions_count = bcm281xx_pinctrl_get_fcns_count,
+	.get_function_name = bcm281xx_pinctrl_get_fcn_name,
+	.get_function_groups = bcm281xx_pinctrl_get_fcn_groups,
+	.set_mux = bcm281xx_pinmux_set,
+};
+
+static int bcm281xx_pinctrl_pin_config_get(struct pinctrl_dev *pctldev,
+					   unsigned pin,
+					   unsigned long *config)
+{
+	return -ENOTSUPP;
+}
+
+
+/* Goes through the configs and update register val/mask */
+static int bcm281xx_std_pin_update(struct pinctrl_dev *pctldev,
+				   unsigned pin,
+				   unsigned long *configs,
+				   unsigned num_configs,
+				   u32 *val,
+				   u32 *mask)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	int i;
+	enum pin_config_param param;
+	u16 arg;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+			arg = (arg >= 1 ? 1 : 0);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(STD, HYST),
+				BCM281XX_PIN_MASK(STD, HYST));
+			break;
+		/*
+		 * The pin bias can only be one of pull-up, pull-down, or
+		 * disable.  The user does not need to specify a value for the
+		 * property, and the default value from pinconf-generic is
+		 * ignored.
+		 */
+		case PIN_CONFIG_BIAS_DISABLE:
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(STD, PULL_UP),
+				BCM281XX_PIN_MASK(STD, PULL_UP));
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(STD, PULL_DN),
+				BCM281XX_PIN_MASK(STD, PULL_DN));
+			break;
+
+		case PIN_CONFIG_BIAS_PULL_UP:
+			bcm281xx_pin_update(val, mask, 1,
+				BCM281XX_PIN_SHIFT(STD, PULL_UP),
+				BCM281XX_PIN_MASK(STD, PULL_UP));
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(STD, PULL_DN),
+				BCM281XX_PIN_MASK(STD, PULL_DN));
+			break;
+
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(STD, PULL_UP),
+				BCM281XX_PIN_MASK(STD, PULL_UP));
+			bcm281xx_pin_update(val, mask, 1,
+				BCM281XX_PIN_SHIFT(STD, PULL_DN),
+				BCM281XX_PIN_MASK(STD, PULL_DN));
+			break;
+
+		case PIN_CONFIG_SLEW_RATE:
+			arg = (arg >= 1 ? 1 : 0);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(STD, SLEW),
+				BCM281XX_PIN_MASK(STD, SLEW));
+			break;
+
+		case PIN_CONFIG_INPUT_ENABLE:
+			/* inversed since register is for input _disable_ */
+			arg = (arg >= 1 ? 0 : 1);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(STD, INPUT_DIS),
+				BCM281XX_PIN_MASK(STD, INPUT_DIS));
+			break;
+
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			/* Valid range is 2-16 mA, even numbers only */
+			if ((arg < 2) || (arg > 16) || (arg % 2)) {
+				dev_err(pctldev->dev,
+					"Invalid Drive Strength value (%d) for "
+					"pin %s (%d). Valid values are "
+					"(2..16) mA, even numbers only.\n",
+					arg, pdata->pins[pin].name, pin);
+				return -EINVAL;
+			}
+			bcm281xx_pin_update(val, mask, (arg/2)-1,
+				BCM281XX_PIN_SHIFT(STD, DRV_STR),
+				BCM281XX_PIN_MASK(STD, DRV_STR));
+			break;
+
+		default:
+			dev_err(pctldev->dev,
+				"Unrecognized pin config %d for pin %s (%d).\n",
+				param, pdata->pins[pin].name, pin);
+			return -EINVAL;
+
+		} /* switch config */
+	} /* for each config */
+
+	return 0;
+}
+
+/*
+ * The pull-up strength for an I2C pin is represented by bits 4-6 in the
+ * register with the following mapping:
+ *   0b000: No pull-up
+ *   0b001: 1200 Ohm
+ *   0b010: 1800 Ohm
+ *   0b011: 720 Ohm
+ *   0b100: 2700 Ohm
+ *   0b101: 831 Ohm
+ *   0b110: 1080 Ohm
+ *   0b111: 568 Ohm
+ * This array maps pull-up strength in Ohms to register values (1+index).
+ */
+static const u16 bcm281xx_pullup_map[] = {
+	1200, 1800, 720, 2700, 831, 1080, 568
+};
+
+/* Goes through the configs and update register val/mask */
+static int bcm281xx_i2c_pin_update(struct pinctrl_dev *pctldev,
+				   unsigned pin,
+				   unsigned long *configs,
+				   unsigned num_configs,
+				   u32 *val,
+				   u32 *mask)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	int i, j;
+	enum pin_config_param param;
+	u16 arg;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_BIAS_PULL_UP:
+			for (j = 0; j < ARRAY_SIZE(bcm281xx_pullup_map); j++)
+				if (bcm281xx_pullup_map[j] == arg)
+					break;
+
+			if (j == ARRAY_SIZE(bcm281xx_pullup_map)) {
+				dev_err(pctldev->dev,
+					"Invalid pull-up value (%d) for pin %s "
+					"(%d). Valid values are 568, 720, 831, "
+					"1080, 1200, 1800, 2700 Ohms.\n",
+					arg, pdata->pins[pin].name, pin);
+				return -EINVAL;
+			}
+
+			bcm281xx_pin_update(val, mask, j+1,
+				BCM281XX_PIN_SHIFT(I2C, PULL_UP_STR),
+				BCM281XX_PIN_MASK(I2C, PULL_UP_STR));
+			break;
+
+		case PIN_CONFIG_BIAS_DISABLE:
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(I2C, PULL_UP_STR),
+				BCM281XX_PIN_MASK(I2C, PULL_UP_STR));
+			break;
+
+		case PIN_CONFIG_SLEW_RATE:
+			arg = (arg >= 1 ? 1 : 0);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(I2C, SLEW),
+				BCM281XX_PIN_MASK(I2C, SLEW));
+			break;
+
+		case PIN_CONFIG_INPUT_ENABLE:
+			/* inversed since register is for input _disable_ */
+			arg = (arg >= 1 ? 0 : 1);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(I2C, INPUT_DIS),
+				BCM281XX_PIN_MASK(I2C, INPUT_DIS));
+			break;
+
+		default:
+			dev_err(pctldev->dev,
+				"Unrecognized pin config %d for pin %s (%d).\n",
+				param, pdata->pins[pin].name, pin);
+			return -EINVAL;
+
+		} /* switch config */
+	} /* for each config */
+
+	return 0;
+}
+
+/* Goes through the configs and update register val/mask */
+static int bcm281xx_hdmi_pin_update(struct pinctrl_dev *pctldev,
+				    unsigned pin,
+				    unsigned long *configs,
+				    unsigned num_configs,
+				    u32 *val,
+				    u32 *mask)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	int i;
+	enum pin_config_param param;
+	u16 arg;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_SLEW_RATE:
+			arg = (arg >= 1 ? 1 : 0);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(HDMI, MODE),
+				BCM281XX_PIN_MASK(HDMI, MODE));
+			break;
+
+		case PIN_CONFIG_INPUT_ENABLE:
+			/* inversed since register is for input _disable_ */
+			arg = (arg >= 1 ? 0 : 1);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(HDMI, INPUT_DIS),
+				BCM281XX_PIN_MASK(HDMI, INPUT_DIS));
+			break;
+
+		default:
+			dev_err(pctldev->dev,
+				"Unrecognized pin config %d for pin %s (%d).\n",
+				param, pdata->pins[pin].name, pin);
+			return -EINVAL;
+
+		} /* switch config */
+	} /* for each config */
+
+	return 0;
+}
+
+static int bcm281xx_pinctrl_pin_config_set(struct pinctrl_dev *pctldev,
+					   unsigned pin,
+					   unsigned long *configs,
+					   unsigned num_configs)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	enum bcm281xx_pin_type pin_type;
+	u32 offset = 4 * pin;
+	u32 cfg_val, cfg_mask;
+	int rc;
+
+	cfg_val = 0;
+	cfg_mask = 0;
+	pin_type = pin_type_get(pctldev, pin);
+
+	/* Different pins have different configuration options */
+	switch (pin_type) {
+	case BCM281XX_PIN_TYPE_STD:
+		rc = bcm281xx_std_pin_update(pctldev, pin, configs,
+			num_configs, &cfg_val, &cfg_mask);
+		break;
+
+	case BCM281XX_PIN_TYPE_I2C:
+		rc = bcm281xx_i2c_pin_update(pctldev, pin, configs,
+			num_configs, &cfg_val, &cfg_mask);
+		break;
+
+	case BCM281XX_PIN_TYPE_HDMI:
+		rc = bcm281xx_hdmi_pin_update(pctldev, pin, configs,
+			num_configs, &cfg_val, &cfg_mask);
+		break;
+
+	default:
+		dev_err(pctldev->dev, "Unknown pin type for pin %s (%d).\n",
+			pdata->pins[pin].name, pin);
+		return -EINVAL;
+
+	} /* switch pin type */
+
+	if (rc)
+		return rc;
+
+	dev_dbg(pctldev->dev,
+		"%s(): Set pin %s (%d) with config 0x%x, mask 0x%x\n",
+		__func__, pdata->pins[pin].name, pin, cfg_val, cfg_mask);
+
+	rc = regmap_update_bits(pdata->regmap, offset, cfg_mask, cfg_val);
+	if (rc) {
+		dev_err(pctldev->dev,
+			"Error updating register for pin %s (%d).\n",
+			pdata->pins[pin].name, pin);
+		return rc;
+	}
+
+	return 0;
+}
+
+static struct pinconf_ops bcm281xx_pinctrl_pinconf_ops = {
+	.pin_config_get = bcm281xx_pinctrl_pin_config_get,
+	.pin_config_set = bcm281xx_pinctrl_pin_config_set,
+};
+
+static struct pinctrl_desc bcm281xx_pinctrl_desc = {
+	/* name, pins, npins members initialized in probe function */
+	.pctlops = &bcm281xx_pinctrl_ops,
+	.pmxops = &bcm281xx_pinctrl_pinmux_ops,
+	.confops = &bcm281xx_pinctrl_pinconf_ops,
+	.owner = THIS_MODULE,
+};
+
+static int __init bcm281xx_pinctrl_probe(struct platform_device *pdev)
+{
+	struct bcm281xx_pinctrl_data *pdata = &bcm281xx_pinctrl;
+	struct resource *res;
+	struct pinctrl_dev *pctl;
+
+	/* So far We can assume there is only 1 bank of registers */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	pdata->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pdata->reg_base)) {
+		dev_err(&pdev->dev, "Failed to ioremap MEM resource\n");
+		return -ENODEV;
+	}
+
+	/* Initialize the dynamic part of pinctrl_desc */
+	pdata->regmap = devm_regmap_init_mmio(&pdev->dev, pdata->reg_base,
+		&bcm281xx_pinctrl_regmap_config);
+	if (IS_ERR(pdata->regmap)) {
+		dev_err(&pdev->dev, "Regmap MMIO init failed.\n");
+		return -ENODEV;
+	}
+
+	bcm281xx_pinctrl_desc.name = dev_name(&pdev->dev);
+	bcm281xx_pinctrl_desc.pins = bcm281xx_pinctrl.pins;
+	bcm281xx_pinctrl_desc.npins = bcm281xx_pinctrl.npins;
+
+	pctl = pinctrl_register(&bcm281xx_pinctrl_desc,
+				&pdev->dev,
+				pdata);
+	if (!pctl) {
+		dev_err(&pdev->dev, "Failed to register pinctrl\n");
+		return -ENODEV;
+	}
+
+	platform_set_drvdata(pdev, pdata);
+
+	return 0;
+}
+
+static struct of_device_id bcm281xx_pinctrl_of_match[] = {
+	{ .compatible = "brcm,bcm11351-pinctrl", },
+	{ },
+};
+
+static struct platform_driver bcm281xx_pinctrl_driver = {
+	.driver = {
+		.name = "bcm281xx-pinctrl",
+		.of_match_table = bcm281xx_pinctrl_of_match,
+	},
+};
+
+module_platform_driver_probe(bcm281xx_pinctrl_driver, bcm281xx_pinctrl_probe);
+
+MODULE_AUTHOR("Broadcom Corporation <bcm-kernel-feedback-list@broadcom.com>");
+MODULE_AUTHOR("Sherman Yin <syin@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom BCM281xx pinctrl driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
new file mode 100644
index 0000000..9aa8a3f
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -0,0 +1,1072 @@
+/*
+ * Driver for Broadcom BCM2835 GPIO unit (pinctrl + GPIO)
+ *
+ * Copyright (C) 2012 Chris Boot, Simon Arlott, Stephen Warren
+ *
+ * This driver is inspired by:
+ * pinctrl-nomadik.c, please see original file for copyright information
+ * pinctrl-tegra.c, please see original file for copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/bitmap.h>
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdesc.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#define MODULE_NAME "pinctrl-bcm2835"
+#define BCM2835_NUM_GPIOS 54
+#define BCM2835_NUM_BANKS 2
+
+#define BCM2835_PIN_BITMAP_SZ \
+	DIV_ROUND_UP(BCM2835_NUM_GPIOS, sizeof(unsigned long) * 8)
+
+/* GPIO register offsets */
+#define GPFSEL0		0x0	/* Function Select */
+#define GPSET0		0x1c	/* Pin Output Set */
+#define GPCLR0		0x28	/* Pin Output Clear */
+#define GPLEV0		0x34	/* Pin Level */
+#define GPEDS0		0x40	/* Pin Event Detect Status */
+#define GPREN0		0x4c	/* Pin Rising Edge Detect Enable */
+#define GPFEN0		0x58	/* Pin Falling Edge Detect Enable */
+#define GPHEN0		0x64	/* Pin High Detect Enable */
+#define GPLEN0		0x70	/* Pin Low Detect Enable */
+#define GPAREN0		0x7c	/* Pin Async Rising Edge Detect */
+#define GPAFEN0		0x88	/* Pin Async Falling Edge Detect */
+#define GPPUD		0x94	/* Pin Pull-up/down Enable */
+#define GPPUDCLK0	0x98	/* Pin Pull-up/down Enable Clock */
+
+#define FSEL_REG(p)		(GPFSEL0 + (((p) / 10) * 4))
+#define FSEL_SHIFT(p)		(((p) % 10) * 3)
+#define GPIO_REG_OFFSET(p)	((p) / 32)
+#define GPIO_REG_SHIFT(p)	((p) % 32)
+
+enum bcm2835_pinconf_param {
+	/* argument: bcm2835_pinconf_pull */
+	BCM2835_PINCONF_PARAM_PULL,
+};
+
+enum bcm2835_pinconf_pull {
+	BCM2835_PINCONFIG_PULL_NONE,
+	BCM2835_PINCONFIG_PULL_DOWN,
+	BCM2835_PINCONFIG_PULL_UP,
+};
+
+#define BCM2835_PINCONF_PACK(_param_, _arg_) ((_param_) << 16 | (_arg_))
+#define BCM2835_PINCONF_UNPACK_PARAM(_conf_) ((_conf_) >> 16)
+#define BCM2835_PINCONF_UNPACK_ARG(_conf_) ((_conf_) & 0xffff)
+
+struct bcm2835_gpio_irqdata {
+	struct bcm2835_pinctrl *pc;
+	int bank;
+};
+
+struct bcm2835_pinctrl {
+	struct device *dev;
+	void __iomem *base;
+	int irq[BCM2835_NUM_BANKS];
+
+	/* note: locking assumes each bank will have its own unsigned long */
+	unsigned long enabled_irq_map[BCM2835_NUM_BANKS];
+	unsigned int irq_type[BCM2835_NUM_GPIOS];
+
+	struct pinctrl_dev *pctl_dev;
+	struct irq_domain *irq_domain;
+	struct gpio_chip gpio_chip;
+	struct pinctrl_gpio_range gpio_range;
+
+	struct bcm2835_gpio_irqdata irq_data[BCM2835_NUM_BANKS];
+	spinlock_t irq_lock[BCM2835_NUM_BANKS];
+};
+
+static struct lock_class_key gpio_lock_class;
+
+/* pins are just named GPIO0..GPIO53 */
+#define BCM2835_GPIO_PIN(a) PINCTRL_PIN(a, "gpio" #a)
+static struct pinctrl_pin_desc bcm2835_gpio_pins[] = {
+	BCM2835_GPIO_PIN(0),
+	BCM2835_GPIO_PIN(1),
+	BCM2835_GPIO_PIN(2),
+	BCM2835_GPIO_PIN(3),
+	BCM2835_GPIO_PIN(4),
+	BCM2835_GPIO_PIN(5),
+	BCM2835_GPIO_PIN(6),
+	BCM2835_GPIO_PIN(7),
+	BCM2835_GPIO_PIN(8),
+	BCM2835_GPIO_PIN(9),
+	BCM2835_GPIO_PIN(10),
+	BCM2835_GPIO_PIN(11),
+	BCM2835_GPIO_PIN(12),
+	BCM2835_GPIO_PIN(13),
+	BCM2835_GPIO_PIN(14),
+	BCM2835_GPIO_PIN(15),
+	BCM2835_GPIO_PIN(16),
+	BCM2835_GPIO_PIN(17),
+	BCM2835_GPIO_PIN(18),
+	BCM2835_GPIO_PIN(19),
+	BCM2835_GPIO_PIN(20),
+	BCM2835_GPIO_PIN(21),
+	BCM2835_GPIO_PIN(22),
+	BCM2835_GPIO_PIN(23),
+	BCM2835_GPIO_PIN(24),
+	BCM2835_GPIO_PIN(25),
+	BCM2835_GPIO_PIN(26),
+	BCM2835_GPIO_PIN(27),
+	BCM2835_GPIO_PIN(28),
+	BCM2835_GPIO_PIN(29),
+	BCM2835_GPIO_PIN(30),
+	BCM2835_GPIO_PIN(31),
+	BCM2835_GPIO_PIN(32),
+	BCM2835_GPIO_PIN(33),
+	BCM2835_GPIO_PIN(34),
+	BCM2835_GPIO_PIN(35),
+	BCM2835_GPIO_PIN(36),
+	BCM2835_GPIO_PIN(37),
+	BCM2835_GPIO_PIN(38),
+	BCM2835_GPIO_PIN(39),
+	BCM2835_GPIO_PIN(40),
+	BCM2835_GPIO_PIN(41),
+	BCM2835_GPIO_PIN(42),
+	BCM2835_GPIO_PIN(43),
+	BCM2835_GPIO_PIN(44),
+	BCM2835_GPIO_PIN(45),
+	BCM2835_GPIO_PIN(46),
+	BCM2835_GPIO_PIN(47),
+	BCM2835_GPIO_PIN(48),
+	BCM2835_GPIO_PIN(49),
+	BCM2835_GPIO_PIN(50),
+	BCM2835_GPIO_PIN(51),
+	BCM2835_GPIO_PIN(52),
+	BCM2835_GPIO_PIN(53),
+};
+
+/* one pin per group */
+static const char * const bcm2835_gpio_groups[] = {
+	"gpio0",
+	"gpio1",
+	"gpio2",
+	"gpio3",
+	"gpio4",
+	"gpio5",
+	"gpio6",
+	"gpio7",
+	"gpio8",
+	"gpio9",
+	"gpio10",
+	"gpio11",
+	"gpio12",
+	"gpio13",
+	"gpio14",
+	"gpio15",
+	"gpio16",
+	"gpio17",
+	"gpio18",
+	"gpio19",
+	"gpio20",
+	"gpio21",
+	"gpio22",
+	"gpio23",
+	"gpio24",
+	"gpio25",
+	"gpio26",
+	"gpio27",
+	"gpio28",
+	"gpio29",
+	"gpio30",
+	"gpio31",
+	"gpio32",
+	"gpio33",
+	"gpio34",
+	"gpio35",
+	"gpio36",
+	"gpio37",
+	"gpio38",
+	"gpio39",
+	"gpio40",
+	"gpio41",
+	"gpio42",
+	"gpio43",
+	"gpio44",
+	"gpio45",
+	"gpio46",
+	"gpio47",
+	"gpio48",
+	"gpio49",
+	"gpio50",
+	"gpio51",
+	"gpio52",
+	"gpio53",
+};
+
+enum bcm2835_fsel {
+	BCM2835_FSEL_GPIO_IN = 0,
+	BCM2835_FSEL_GPIO_OUT = 1,
+	BCM2835_FSEL_ALT0 = 4,
+	BCM2835_FSEL_ALT1 = 5,
+	BCM2835_FSEL_ALT2 = 6,
+	BCM2835_FSEL_ALT3 = 7,
+	BCM2835_FSEL_ALT4 = 3,
+	BCM2835_FSEL_ALT5 = 2,
+	BCM2835_FSEL_COUNT = 8,
+	BCM2835_FSEL_MASK = 0x7,
+};
+
+static const char * const bcm2835_functions[BCM2835_FSEL_COUNT] = {
+	[BCM2835_FSEL_GPIO_IN] = "gpio_in",
+	[BCM2835_FSEL_GPIO_OUT] = "gpio_out",
+	[BCM2835_FSEL_ALT0] = "alt0",
+	[BCM2835_FSEL_ALT1] = "alt1",
+	[BCM2835_FSEL_ALT2] = "alt2",
+	[BCM2835_FSEL_ALT3] = "alt3",
+	[BCM2835_FSEL_ALT4] = "alt4",
+	[BCM2835_FSEL_ALT5] = "alt5",
+};
+
+static const char * const irq_type_names[] = {
+	[IRQ_TYPE_NONE] = "none",
+	[IRQ_TYPE_EDGE_RISING] = "edge-rising",
+	[IRQ_TYPE_EDGE_FALLING] = "edge-falling",
+	[IRQ_TYPE_EDGE_BOTH] = "edge-both",
+	[IRQ_TYPE_LEVEL_HIGH] = "level-high",
+	[IRQ_TYPE_LEVEL_LOW] = "level-low",
+};
+
+static inline u32 bcm2835_gpio_rd(struct bcm2835_pinctrl *pc, unsigned reg)
+{
+	return readl(pc->base + reg);
+}
+
+static inline void bcm2835_gpio_wr(struct bcm2835_pinctrl *pc, unsigned reg,
+		u32 val)
+{
+	writel(val, pc->base + reg);
+}
+
+static inline int bcm2835_gpio_get_bit(struct bcm2835_pinctrl *pc, unsigned reg,
+		unsigned bit)
+{
+	reg += GPIO_REG_OFFSET(bit) * 4;
+	return (bcm2835_gpio_rd(pc, reg) >> GPIO_REG_SHIFT(bit)) & 1;
+}
+
+/* note NOT a read/modify/write cycle */
+static inline void bcm2835_gpio_set_bit(struct bcm2835_pinctrl *pc,
+		unsigned reg, unsigned bit)
+{
+	reg += GPIO_REG_OFFSET(bit) * 4;
+	bcm2835_gpio_wr(pc, reg, BIT(GPIO_REG_SHIFT(bit)));
+}
+
+static inline enum bcm2835_fsel bcm2835_pinctrl_fsel_get(
+		struct bcm2835_pinctrl *pc, unsigned pin)
+{
+	u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
+	enum bcm2835_fsel status = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
+
+	dev_dbg(pc->dev, "get %08x (%u => %s)\n", val, pin,
+			bcm2835_functions[status]);
+
+	return status;
+}
+
+static inline void bcm2835_pinctrl_fsel_set(
+		struct bcm2835_pinctrl *pc, unsigned pin,
+		enum bcm2835_fsel fsel)
+{
+	u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
+	enum bcm2835_fsel cur = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
+
+	dev_dbg(pc->dev, "read %08x (%u => %s)\n", val, pin,
+			bcm2835_functions[cur]);
+
+	if (cur == fsel)
+		return;
+
+	if (cur != BCM2835_FSEL_GPIO_IN && fsel != BCM2835_FSEL_GPIO_IN) {
+		/* always transition through GPIO_IN */
+		val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
+		val |= BCM2835_FSEL_GPIO_IN << FSEL_SHIFT(pin);
+
+		dev_dbg(pc->dev, "trans %08x (%u <= %s)\n", val, pin,
+				bcm2835_functions[BCM2835_FSEL_GPIO_IN]);
+		bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
+	}
+
+	val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
+	val |= fsel << FSEL_SHIFT(pin);
+
+	dev_dbg(pc->dev, "write %08x (%u <= %s)\n", val, pin,
+			bcm2835_functions[fsel]);
+	bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
+}
+
+static int bcm2835_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void bcm2835_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+	pinctrl_free_gpio(chip->base + offset);
+}
+
+static int bcm2835_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+	return pinctrl_gpio_direction_input(chip->base + offset);
+}
+
+static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+
+	return bcm2835_gpio_get_bit(pc, GPLEV0, offset);
+}
+
+static int bcm2835_gpio_direction_output(struct gpio_chip *chip,
+		unsigned offset, int value)
+{
+	return pinctrl_gpio_direction_output(chip->base + offset);
+}
+
+static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+
+	bcm2835_gpio_set_bit(pc, value ? GPSET0 : GPCLR0, offset);
+}
+
+static int bcm2835_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+
+	return irq_linear_revmap(pc->irq_domain, offset);
+}
+
+static struct gpio_chip bcm2835_gpio_chip = {
+	.label = MODULE_NAME,
+	.owner = THIS_MODULE,
+	.request = bcm2835_gpio_request,
+	.free = bcm2835_gpio_free,
+	.direction_input = bcm2835_gpio_direction_input,
+	.direction_output = bcm2835_gpio_direction_output,
+	.get = bcm2835_gpio_get,
+	.set = bcm2835_gpio_set,
+	.to_irq = bcm2835_gpio_to_irq,
+	.base = -1,
+	.ngpio = BCM2835_NUM_GPIOS,
+	.can_sleep = false,
+};
+
+static irqreturn_t bcm2835_gpio_irq_handler(int irq, void *dev_id)
+{
+	struct bcm2835_gpio_irqdata *irqdata = dev_id;
+	struct bcm2835_pinctrl *pc = irqdata->pc;
+	int bank = irqdata->bank;
+	unsigned long events;
+	unsigned offset;
+	unsigned gpio;
+	unsigned int type;
+
+	events = bcm2835_gpio_rd(pc, GPEDS0 + bank * 4);
+	events &= pc->enabled_irq_map[bank];
+	for_each_set_bit(offset, &events, 32) {
+		gpio = (32 * bank) + offset;
+		type = pc->irq_type[gpio];
+
+		/* ack edge triggered IRQs immediately */
+		if (!(type & IRQ_TYPE_LEVEL_MASK))
+			bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
+
+		generic_handle_irq(irq_linear_revmap(pc->irq_domain, gpio));
+
+		/* ack level triggered IRQ after handling them */
+		if (type & IRQ_TYPE_LEVEL_MASK)
+			bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
+	}
+	return events ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static inline void __bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
+	unsigned reg, unsigned offset, bool enable)
+{
+	u32 value;
+	reg += GPIO_REG_OFFSET(offset) * 4;
+	value = bcm2835_gpio_rd(pc, reg);
+	if (enable)
+		value |= BIT(GPIO_REG_SHIFT(offset));
+	else
+		value &= ~(BIT(GPIO_REG_SHIFT(offset)));
+	bcm2835_gpio_wr(pc, reg, value);
+}
+
+/* fast path for IRQ handler */
+static void bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
+	unsigned offset, bool enable)
+{
+	switch (pc->irq_type[offset]) {
+	case IRQ_TYPE_EDGE_RISING:
+		__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
+		__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		__bcm2835_gpio_irq_config(pc, GPHEN0, offset, enable);
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		__bcm2835_gpio_irq_config(pc, GPLEN0, offset, enable);
+		break;
+	}
+}
+
+static void bcm2835_gpio_irq_enable(struct irq_data *data)
+{
+	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
+	unsigned gpio = irqd_to_hwirq(data);
+	unsigned offset = GPIO_REG_SHIFT(gpio);
+	unsigned bank = GPIO_REG_OFFSET(gpio);
+	unsigned long flags;
+
+	spin_lock_irqsave(&pc->irq_lock[bank], flags);
+	set_bit(offset, &pc->enabled_irq_map[bank]);
+	bcm2835_gpio_irq_config(pc, gpio, true);
+	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
+}
+
+static void bcm2835_gpio_irq_disable(struct irq_data *data)
+{
+	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
+	unsigned gpio = irqd_to_hwirq(data);
+	unsigned offset = GPIO_REG_SHIFT(gpio);
+	unsigned bank = GPIO_REG_OFFSET(gpio);
+	unsigned long flags;
+
+	spin_lock_irqsave(&pc->irq_lock[bank], flags);
+	bcm2835_gpio_irq_config(pc, gpio, false);
+	clear_bit(offset, &pc->enabled_irq_map[bank]);
+	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
+}
+
+static int __bcm2835_gpio_irq_set_type_disabled(struct bcm2835_pinctrl *pc,
+	unsigned offset, unsigned int type)
+{
+	switch (type) {
+	case IRQ_TYPE_NONE:
+	case IRQ_TYPE_EDGE_RISING:
+	case IRQ_TYPE_EDGE_FALLING:
+	case IRQ_TYPE_EDGE_BOTH:
+	case IRQ_TYPE_LEVEL_HIGH:
+	case IRQ_TYPE_LEVEL_LOW:
+		pc->irq_type[offset] = type;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/* slower path for reconfiguring IRQ type */
+static int __bcm2835_gpio_irq_set_type_enabled(struct bcm2835_pinctrl *pc,
+	unsigned offset, unsigned int type)
+{
+	switch (type) {
+	case IRQ_TYPE_NONE:
+		if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+		}
+		break;
+
+	case IRQ_TYPE_EDGE_RISING:
+		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
+			/* RISING already enabled, disable FALLING */
+			pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+		} else if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+			bcm2835_gpio_irq_config(pc, offset, true);
+		}
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
+			/* FALLING already enabled, disable RISING */
+			pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+		} else if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+			bcm2835_gpio_irq_config(pc, offset, true);
+		}
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_RISING) {
+			/* RISING already enabled, enable FALLING too */
+			pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
+			bcm2835_gpio_irq_config(pc, offset, true);
+			pc->irq_type[offset] = type;
+		} else if (pc->irq_type[offset] == IRQ_TYPE_EDGE_FALLING) {
+			/* FALLING already enabled, enable RISING too */
+			pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
+			bcm2835_gpio_irq_config(pc, offset, true);
+			pc->irq_type[offset] = type;
+		} else if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+			bcm2835_gpio_irq_config(pc, offset, true);
+		}
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+	case IRQ_TYPE_LEVEL_LOW:
+		if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+			bcm2835_gpio_irq_config(pc, offset, true);
+		}
+		break;
+
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int bcm2835_gpio_irq_set_type(struct irq_data *data, unsigned int type)
+{
+	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
+	unsigned gpio = irqd_to_hwirq(data);
+	unsigned offset = GPIO_REG_SHIFT(gpio);
+	unsigned bank = GPIO_REG_OFFSET(gpio);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&pc->irq_lock[bank], flags);
+
+	if (test_bit(offset, &pc->enabled_irq_map[bank]))
+		ret = __bcm2835_gpio_irq_set_type_enabled(pc, gpio, type);
+	else
+		ret = __bcm2835_gpio_irq_set_type_disabled(pc, gpio, type);
+
+	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
+
+	return ret;
+}
+
+static struct irq_chip bcm2835_gpio_irq_chip = {
+	.name = MODULE_NAME,
+	.irq_enable = bcm2835_gpio_irq_enable,
+	.irq_disable = bcm2835_gpio_irq_disable,
+	.irq_set_type = bcm2835_gpio_irq_set_type,
+};
+
+static int bcm2835_pctl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	return ARRAY_SIZE(bcm2835_gpio_groups);
+}
+
+static const char *bcm2835_pctl_get_group_name(struct pinctrl_dev *pctldev,
+		unsigned selector)
+{
+	return bcm2835_gpio_groups[selector];
+}
+
+static int bcm2835_pctl_get_group_pins(struct pinctrl_dev *pctldev,
+		unsigned selector,
+		const unsigned **pins,
+		unsigned *num_pins)
+{
+	*pins = &bcm2835_gpio_pins[selector].number;
+	*num_pins = 1;
+
+	return 0;
+}
+
+static void bcm2835_pctl_pin_dbg_show(struct pinctrl_dev *pctldev,
+		struct seq_file *s,
+		unsigned offset)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+	enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);
+	const char *fname = bcm2835_functions[fsel];
+	int value = bcm2835_gpio_get_bit(pc, GPLEV0, offset);
+	int irq = irq_find_mapping(pc->irq_domain, offset);
+
+	seq_printf(s, "function %s in %s; irq %d (%s)",
+		fname, value ? "hi" : "lo",
+		irq, irq_type_names[pc->irq_type[offset]]);
+}
+
+static void bcm2835_pctl_dt_free_map(struct pinctrl_dev *pctldev,
+		struct pinctrl_map *maps, unsigned num_maps)
+{
+	int i;
+
+	for (i = 0; i < num_maps; i++)
+		if (maps[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
+			kfree(maps[i].data.configs.configs);
+
+	kfree(maps);
+}
+
+static int bcm2835_pctl_dt_node_to_map_func(struct bcm2835_pinctrl *pc,
+		struct device_node *np, u32 pin, u32 fnum,
+		struct pinctrl_map **maps)
+{
+	struct pinctrl_map *map = *maps;
+
+	if (fnum >= ARRAY_SIZE(bcm2835_functions)) {
+		dev_err(pc->dev, "%s: invalid brcm,function %d\n",
+			of_node_full_name(np), fnum);
+		return -EINVAL;
+	}
+
+	map->type = PIN_MAP_TYPE_MUX_GROUP;
+	map->data.mux.group = bcm2835_gpio_groups[pin];
+	map->data.mux.function = bcm2835_functions[fnum];
+	(*maps)++;
+
+	return 0;
+}
+
+static int bcm2835_pctl_dt_node_to_map_pull(struct bcm2835_pinctrl *pc,
+		struct device_node *np, u32 pin, u32 pull,
+		struct pinctrl_map **maps)
+{
+	struct pinctrl_map *map = *maps;
+	unsigned long *configs;
+
+	if (pull > 2) {
+		dev_err(pc->dev, "%s: invalid brcm,pull %d\n",
+			of_node_full_name(np), pull);
+		return -EINVAL;
+	}
+
+	configs = kzalloc(sizeof(*configs), GFP_KERNEL);
+	if (!configs)
+		return -ENOMEM;
+	configs[0] = BCM2835_PINCONF_PACK(BCM2835_PINCONF_PARAM_PULL, pull);
+
+	map->type = PIN_MAP_TYPE_CONFIGS_PIN;
+	map->data.configs.group_or_pin = bcm2835_gpio_pins[pin].name;
+	map->data.configs.configs = configs;
+	map->data.configs.num_configs = 1;
+	(*maps)++;
+
+	return 0;
+}
+
+static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
+		struct device_node *np,
+		struct pinctrl_map **map, unsigned *num_maps)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+	struct property *pins, *funcs, *pulls;
+	int num_pins, num_funcs, num_pulls, maps_per_pin;
+	struct pinctrl_map *maps, *cur_map;
+	int i, err;
+	u32 pin, func, pull;
+
+	pins = of_find_property(np, "brcm,pins", NULL);
+	if (!pins) {
+		dev_err(pc->dev, "%s: missing brcm,pins property\n",
+				of_node_full_name(np));
+		return -EINVAL;
+	}
+
+	funcs = of_find_property(np, "brcm,function", NULL);
+	pulls = of_find_property(np, "brcm,pull", NULL);
+
+	if (!funcs && !pulls) {
+		dev_err(pc->dev,
+			"%s: neither brcm,function nor brcm,pull specified\n",
+			of_node_full_name(np));
+		return -EINVAL;
+	}
+
+	num_pins = pins->length / 4;
+	num_funcs = funcs ? (funcs->length / 4) : 0;
+	num_pulls = pulls ? (pulls->length / 4) : 0;
+
+	if (num_funcs > 1 && num_funcs != num_pins) {
+		dev_err(pc->dev,
+			"%s: brcm,function must have 1 or %d entries\n",
+			of_node_full_name(np), num_pins);
+		return -EINVAL;
+	}
+
+	if (num_pulls > 1 && num_pulls != num_pins) {
+		dev_err(pc->dev,
+			"%s: brcm,pull must have 1 or %d entries\n",
+			of_node_full_name(np), num_pins);
+		return -EINVAL;
+	}
+
+	maps_per_pin = 0;
+	if (num_funcs)
+		maps_per_pin++;
+	if (num_pulls)
+		maps_per_pin++;
+	cur_map = maps = kzalloc(num_pins * maps_per_pin * sizeof(*maps),
+				GFP_KERNEL);
+	if (!maps)
+		return -ENOMEM;
+
+	for (i = 0; i < num_pins; i++) {
+		err = of_property_read_u32_index(np, "brcm,pins", i, &pin);
+		if (err)
+			goto out;
+		if (pin >= ARRAY_SIZE(bcm2835_gpio_pins)) {
+			dev_err(pc->dev, "%s: invalid brcm,pins value %d\n",
+				of_node_full_name(np), pin);
+			err = -EINVAL;
+			goto out;
+		}
+
+		if (num_funcs) {
+			err = of_property_read_u32_index(np, "brcm,function",
+					(num_funcs > 1) ? i : 0, &func);
+			if (err)
+				goto out;
+			err = bcm2835_pctl_dt_node_to_map_func(pc, np, pin,
+							func, &cur_map);
+			if (err)
+				goto out;
+		}
+		if (num_pulls) {
+			err = of_property_read_u32_index(np, "brcm,pull",
+					(num_funcs > 1) ? i : 0, &pull);
+			if (err)
+				goto out;
+			err = bcm2835_pctl_dt_node_to_map_pull(pc, np, pin,
+							pull, &cur_map);
+			if (err)
+				goto out;
+		}
+	}
+
+	*map = maps;
+	*num_maps = num_pins * maps_per_pin;
+
+	return 0;
+
+out:
+	kfree(maps);
+	return err;
+}
+
+static const struct pinctrl_ops bcm2835_pctl_ops = {
+	.get_groups_count = bcm2835_pctl_get_groups_count,
+	.get_group_name = bcm2835_pctl_get_group_name,
+	.get_group_pins = bcm2835_pctl_get_group_pins,
+	.pin_dbg_show = bcm2835_pctl_pin_dbg_show,
+	.dt_node_to_map = bcm2835_pctl_dt_node_to_map,
+	.dt_free_map = bcm2835_pctl_dt_free_map,
+};
+
+static int bcm2835_pmx_get_functions_count(struct pinctrl_dev *pctldev)
+{
+	return BCM2835_FSEL_COUNT;
+}
+
+static const char *bcm2835_pmx_get_function_name(struct pinctrl_dev *pctldev,
+		unsigned selector)
+{
+	return bcm2835_functions[selector];
+}
+
+static int bcm2835_pmx_get_function_groups(struct pinctrl_dev *pctldev,
+		unsigned selector,
+		const char * const **groups,
+		unsigned * const num_groups)
+{
+	/* every pin can do every function */
+	*groups = bcm2835_gpio_groups;
+	*num_groups = ARRAY_SIZE(bcm2835_gpio_groups);
+
+	return 0;
+}
+
+static int bcm2835_pmx_set(struct pinctrl_dev *pctldev,
+		unsigned func_selector,
+		unsigned group_selector)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+
+	bcm2835_pinctrl_fsel_set(pc, group_selector, func_selector);
+
+	return 0;
+}
+
+static void bcm2835_pmx_gpio_disable_free(struct pinctrl_dev *pctldev,
+		struct pinctrl_gpio_range *range,
+		unsigned offset)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+
+	/* disable by setting to GPIO_IN */
+	bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN);
+}
+
+static int bcm2835_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
+		struct pinctrl_gpio_range *range,
+		unsigned offset,
+		bool input)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+	enum bcm2835_fsel fsel = input ?
+		BCM2835_FSEL_GPIO_IN : BCM2835_FSEL_GPIO_OUT;
+
+	bcm2835_pinctrl_fsel_set(pc, offset, fsel);
+
+	return 0;
+}
+
+static const struct pinmux_ops bcm2835_pmx_ops = {
+	.get_functions_count = bcm2835_pmx_get_functions_count,
+	.get_function_name = bcm2835_pmx_get_function_name,
+	.get_function_groups = bcm2835_pmx_get_function_groups,
+	.set_mux = bcm2835_pmx_set,
+	.gpio_disable_free = bcm2835_pmx_gpio_disable_free,
+	.gpio_set_direction = bcm2835_pmx_gpio_set_direction,
+};
+
+static int bcm2835_pinconf_get(struct pinctrl_dev *pctldev,
+			unsigned pin, unsigned long *config)
+{
+	/* No way to read back config in HW */
+	return -ENOTSUPP;
+}
+
+static int bcm2835_pinconf_set(struct pinctrl_dev *pctldev,
+			unsigned pin, unsigned long *configs,
+			unsigned num_configs)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+	enum bcm2835_pinconf_param param;
+	u16 arg;
+	u32 off, bit;
+	int i;
+
+	for (i = 0; i < num_configs; i++) {
+		param = BCM2835_PINCONF_UNPACK_PARAM(configs[i]);
+		arg = BCM2835_PINCONF_UNPACK_ARG(configs[i]);
+
+		if (param != BCM2835_PINCONF_PARAM_PULL)
+			return -EINVAL;
+
+		off = GPIO_REG_OFFSET(pin);
+		bit = GPIO_REG_SHIFT(pin);
+
+		bcm2835_gpio_wr(pc, GPPUD, arg & 3);
+		/*
+		 * Docs say to wait 150 cycles, but not of what. We assume a
+		 * 1 MHz clock here, which is pretty slow...
+		 */
+		udelay(150);
+		bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), BIT(bit));
+		udelay(150);
+		bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), 0);
+	} /* for each config */
+
+	return 0;
+}
+
+static const struct pinconf_ops bcm2835_pinconf_ops = {
+	.pin_config_get = bcm2835_pinconf_get,
+	.pin_config_set = bcm2835_pinconf_set,
+};
+
+static struct pinctrl_desc bcm2835_pinctrl_desc = {
+	.name = MODULE_NAME,
+	.pins = bcm2835_gpio_pins,
+	.npins = ARRAY_SIZE(bcm2835_gpio_pins),
+	.pctlops = &bcm2835_pctl_ops,
+	.pmxops = &bcm2835_pmx_ops,
+	.confops = &bcm2835_pinconf_ops,
+	.owner = THIS_MODULE,
+};
+
+static struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = {
+	.name = MODULE_NAME,
+	.npins = BCM2835_NUM_GPIOS,
+};
+
+static int bcm2835_pinctrl_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct bcm2835_pinctrl *pc;
+	struct resource iomem;
+	int err, i;
+	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_pins) != BCM2835_NUM_GPIOS);
+	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_groups) != BCM2835_NUM_GPIOS);
+
+	pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
+	if (!pc)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, pc);
+	pc->dev = dev;
+
+	err = of_address_to_resource(np, 0, &iomem);
+	if (err) {
+		dev_err(dev, "could not get IO memory\n");
+		return err;
+	}
+
+	pc->base = devm_ioremap_resource(dev, &iomem);
+	if (IS_ERR(pc->base))
+		return PTR_ERR(pc->base);
+
+	pc->gpio_chip = bcm2835_gpio_chip;
+	pc->gpio_chip.dev = dev;
+	pc->gpio_chip.of_node = np;
+
+	pc->irq_domain = irq_domain_add_linear(np, BCM2835_NUM_GPIOS,
+			&irq_domain_simple_ops, NULL);
+	if (!pc->irq_domain) {
+		dev_err(dev, "could not create IRQ domain\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < BCM2835_NUM_GPIOS; i++) {
+		int irq = irq_create_mapping(pc->irq_domain, i);
+		irq_set_lockdep_class(irq, &gpio_lock_class);
+		irq_set_chip_and_handler(irq, &bcm2835_gpio_irq_chip,
+				handle_simple_irq);
+		irq_set_chip_data(irq, pc);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	for (i = 0; i < BCM2835_NUM_BANKS; i++) {
+		unsigned long events;
+		unsigned offset;
+		int len;
+		char *name;
+
+		/* clear event detection flags */
+		bcm2835_gpio_wr(pc, GPREN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPFEN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPHEN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPLEN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPAREN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPAFEN0 + i * 4, 0);
+
+		/* clear all the events */
+		events = bcm2835_gpio_rd(pc, GPEDS0 + i * 4);
+		for_each_set_bit(offset, &events, 32)
+			bcm2835_gpio_wr(pc, GPEDS0 + i * 4, BIT(offset));
+
+		pc->irq[i] = irq_of_parse_and_map(np, i);
+		pc->irq_data[i].pc = pc;
+		pc->irq_data[i].bank = i;
+		spin_lock_init(&pc->irq_lock[i]);
+
+		len = strlen(dev_name(pc->dev)) + 16;
+		name = devm_kzalloc(pc->dev, len, GFP_KERNEL);
+		if (!name)
+			return -ENOMEM;
+		snprintf(name, len, "%s:bank%d", dev_name(pc->dev), i);
+
+		err = devm_request_irq(dev, pc->irq[i],
+			bcm2835_gpio_irq_handler, IRQF_SHARED,
+			name, &pc->irq_data[i]);
+		if (err) {
+			dev_err(dev, "unable to request IRQ %d\n", pc->irq[i]);
+			return err;
+		}
+	}
+
+	err = gpiochip_add(&pc->gpio_chip);
+	if (err) {
+		dev_err(dev, "could not add GPIO chip\n");
+		return err;
+	}
+
+	pc->pctl_dev = pinctrl_register(&bcm2835_pinctrl_desc, dev, pc);
+	if (!pc->pctl_dev) {
+		gpiochip_remove(&pc->gpio_chip);
+		return -EINVAL;
+	}
+
+	pc->gpio_range = bcm2835_pinctrl_gpio_range;
+	pc->gpio_range.base = pc->gpio_chip.base;
+	pc->gpio_range.gc = &pc->gpio_chip;
+	pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
+
+	return 0;
+}
+
+static int bcm2835_pinctrl_remove(struct platform_device *pdev)
+{
+	struct bcm2835_pinctrl *pc = platform_get_drvdata(pdev);
+
+	pinctrl_unregister(pc->pctl_dev);
+	gpiochip_remove(&pc->gpio_chip);
+
+	return 0;
+}
+
+static struct of_device_id bcm2835_pinctrl_match[] = {
+	{ .compatible = "brcm,bcm2835-gpio" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, bcm2835_pinctrl_match);
+
+static struct platform_driver bcm2835_pinctrl_driver = {
+	.probe = bcm2835_pinctrl_probe,
+	.remove = bcm2835_pinctrl_remove,
+	.driver = {
+		.name = MODULE_NAME,
+		.of_match_table = bcm2835_pinctrl_match,
+	},
+};
+module_platform_driver(bcm2835_pinctrl_driver);
+
+MODULE_AUTHOR("Chris Boot, Simon Arlott, Stephen Warren");
+MODULE_DESCRIPTION("BCM2835 Pin control driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/pinctrl/pinctrl-bcm281xx.c b/drivers/pinctrl/pinctrl-bcm281xx.c
deleted file mode 100644
index fa2a00f..0000000
--- a/drivers/pinctrl/pinctrl-bcm281xx.c
+++ /dev/null
@@ -1,1455 +0,0 @@
-/*
- * Copyright (C) 2013 Broadcom Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/pinctrl/pinctrl.h>
-#include <linux/pinctrl/pinmux.h>
-#include <linux/pinctrl/pinconf.h>
-#include <linux/pinctrl/pinconf-generic.h>
-#include <linux/regmap.h>
-#include <linux/slab.h>
-#include "core.h"
-#include "pinctrl-utils.h"
-
-/* BCM281XX Pin Control Registers Definitions */
-
-/* Function Select bits are the same for all pin control registers */
-#define BCM281XX_PIN_REG_F_SEL_MASK		0x0700
-#define BCM281XX_PIN_REG_F_SEL_SHIFT		8
-
-/* Standard pin register */
-#define BCM281XX_STD_PIN_REG_DRV_STR_MASK	0x0007
-#define BCM281XX_STD_PIN_REG_DRV_STR_SHIFT	0
-#define BCM281XX_STD_PIN_REG_INPUT_DIS_MASK	0x0008
-#define BCM281XX_STD_PIN_REG_INPUT_DIS_SHIFT	3
-#define BCM281XX_STD_PIN_REG_SLEW_MASK		0x0010
-#define BCM281XX_STD_PIN_REG_SLEW_SHIFT		4
-#define BCM281XX_STD_PIN_REG_PULL_UP_MASK	0x0020
-#define BCM281XX_STD_PIN_REG_PULL_UP_SHIFT	5
-#define BCM281XX_STD_PIN_REG_PULL_DN_MASK	0x0040
-#define BCM281XX_STD_PIN_REG_PULL_DN_SHIFT	6
-#define BCM281XX_STD_PIN_REG_HYST_MASK		0x0080
-#define BCM281XX_STD_PIN_REG_HYST_SHIFT		7
-
-/* I2C pin register */
-#define BCM281XX_I2C_PIN_REG_INPUT_DIS_MASK	0x0004
-#define BCM281XX_I2C_PIN_REG_INPUT_DIS_SHIFT	2
-#define BCM281XX_I2C_PIN_REG_SLEW_MASK		0x0008
-#define BCM281XX_I2C_PIN_REG_SLEW_SHIFT		3
-#define BCM281XX_I2C_PIN_REG_PULL_UP_STR_MASK	0x0070
-#define BCM281XX_I2C_PIN_REG_PULL_UP_STR_SHIFT	4
-
-/* HDMI pin register */
-#define BCM281XX_HDMI_PIN_REG_INPUT_DIS_MASK	0x0008
-#define BCM281XX_HDMI_PIN_REG_INPUT_DIS_SHIFT	3
-#define BCM281XX_HDMI_PIN_REG_MODE_MASK		0x0010
-#define BCM281XX_HDMI_PIN_REG_MODE_SHIFT	4
-
-/**
- * bcm281xx_pin_type - types of pin register
- */
-enum bcm281xx_pin_type {
-	BCM281XX_PIN_TYPE_UNKNOWN = 0,
-	BCM281XX_PIN_TYPE_STD,
-	BCM281XX_PIN_TYPE_I2C,
-	BCM281XX_PIN_TYPE_HDMI,
-};
-
-static enum bcm281xx_pin_type std_pin = BCM281XX_PIN_TYPE_STD;
-static enum bcm281xx_pin_type i2c_pin = BCM281XX_PIN_TYPE_I2C;
-static enum bcm281xx_pin_type hdmi_pin = BCM281XX_PIN_TYPE_HDMI;
-
-/**
- * bcm281xx_pin_function- define pin function
- */
-struct bcm281xx_pin_function {
-	const char *name;
-	const char * const *groups;
-	const unsigned ngroups;
-};
-
-/**
- * bcm281xx_pinctrl_data - Broadcom-specific pinctrl data
- * @reg_base - base of pinctrl registers
- */
-struct bcm281xx_pinctrl_data {
-	void __iomem *reg_base;
-
-	/* List of all pins */
-	const struct pinctrl_pin_desc *pins;
-	const unsigned npins;
-
-	const struct bcm281xx_pin_function *functions;
-	const unsigned nfunctions;
-
-	struct regmap *regmap;
-};
-
-/*
- * Pin number definition.  The order here must be the same as defined in the
- * PADCTRLREG block in the RDB.
- */
-#define BCM281XX_PIN_ADCSYNC		0
-#define BCM281XX_PIN_BAT_RM		1
-#define BCM281XX_PIN_BSC1_SCL		2
-#define BCM281XX_PIN_BSC1_SDA		3
-#define BCM281XX_PIN_BSC2_SCL		4
-#define BCM281XX_PIN_BSC2_SDA		5
-#define BCM281XX_PIN_CLASSGPWR		6
-#define BCM281XX_PIN_CLK_CX8		7
-#define BCM281XX_PIN_CLKOUT_0		8
-#define BCM281XX_PIN_CLKOUT_1		9
-#define BCM281XX_PIN_CLKOUT_2		10
-#define BCM281XX_PIN_CLKOUT_3		11
-#define BCM281XX_PIN_CLKREQ_IN_0	12
-#define BCM281XX_PIN_CLKREQ_IN_1	13
-#define BCM281XX_PIN_CWS_SYS_REQ1	14
-#define BCM281XX_PIN_CWS_SYS_REQ2	15
-#define BCM281XX_PIN_CWS_SYS_REQ3	16
-#define BCM281XX_PIN_DIGMIC1_CLK	17
-#define BCM281XX_PIN_DIGMIC1_DQ		18
-#define BCM281XX_PIN_DIGMIC2_CLK	19
-#define BCM281XX_PIN_DIGMIC2_DQ		20
-#define BCM281XX_PIN_GPEN13		21
-#define BCM281XX_PIN_GPEN14		22
-#define BCM281XX_PIN_GPEN15		23
-#define BCM281XX_PIN_GPIO00		24
-#define BCM281XX_PIN_GPIO01		25
-#define BCM281XX_PIN_GPIO02		26
-#define BCM281XX_PIN_GPIO03		27
-#define BCM281XX_PIN_GPIO04		28
-#define BCM281XX_PIN_GPIO05		29
-#define BCM281XX_PIN_GPIO06		30
-#define BCM281XX_PIN_GPIO07		31
-#define BCM281XX_PIN_GPIO08		32
-#define BCM281XX_PIN_GPIO09		33
-#define BCM281XX_PIN_GPIO10		34
-#define BCM281XX_PIN_GPIO11		35
-#define BCM281XX_PIN_GPIO12		36
-#define BCM281XX_PIN_GPIO13		37
-#define BCM281XX_PIN_GPIO14		38
-#define BCM281XX_PIN_GPS_PABLANK	39
-#define BCM281XX_PIN_GPS_TMARK		40
-#define BCM281XX_PIN_HDMI_SCL		41
-#define BCM281XX_PIN_HDMI_SDA		42
-#define BCM281XX_PIN_IC_DM		43
-#define BCM281XX_PIN_IC_DP		44
-#define BCM281XX_PIN_KP_COL_IP_0	45
-#define BCM281XX_PIN_KP_COL_IP_1	46
-#define BCM281XX_PIN_KP_COL_IP_2	47
-#define BCM281XX_PIN_KP_COL_IP_3	48
-#define BCM281XX_PIN_KP_ROW_OP_0	49
-#define BCM281XX_PIN_KP_ROW_OP_1	50
-#define BCM281XX_PIN_KP_ROW_OP_2	51
-#define BCM281XX_PIN_KP_ROW_OP_3	52
-#define BCM281XX_PIN_LCD_B_0		53
-#define BCM281XX_PIN_LCD_B_1		54
-#define BCM281XX_PIN_LCD_B_2		55
-#define BCM281XX_PIN_LCD_B_3		56
-#define BCM281XX_PIN_LCD_B_4		57
-#define BCM281XX_PIN_LCD_B_5		58
-#define BCM281XX_PIN_LCD_B_6		59
-#define BCM281XX_PIN_LCD_B_7		60
-#define BCM281XX_PIN_LCD_G_0		61
-#define BCM281XX_PIN_LCD_G_1		62
-#define BCM281XX_PIN_LCD_G_2		63
-#define BCM281XX_PIN_LCD_G_3		64
-#define BCM281XX_PIN_LCD_G_4		65
-#define BCM281XX_PIN_LCD_G_5		66
-#define BCM281XX_PIN_LCD_G_6		67
-#define BCM281XX_PIN_LCD_G_7		68
-#define BCM281XX_PIN_LCD_HSYNC		69
-#define BCM281XX_PIN_LCD_OE		70
-#define BCM281XX_PIN_LCD_PCLK		71
-#define BCM281XX_PIN_LCD_R_0		72
-#define BCM281XX_PIN_LCD_R_1		73
-#define BCM281XX_PIN_LCD_R_2		74
-#define BCM281XX_PIN_LCD_R_3		75
-#define BCM281XX_PIN_LCD_R_4		76
-#define BCM281XX_PIN_LCD_R_5		77
-#define BCM281XX_PIN_LCD_R_6		78
-#define BCM281XX_PIN_LCD_R_7		79
-#define BCM281XX_PIN_LCD_VSYNC		80
-#define BCM281XX_PIN_MDMGPIO0		81
-#define BCM281XX_PIN_MDMGPIO1		82
-#define BCM281XX_PIN_MDMGPIO2		83
-#define BCM281XX_PIN_MDMGPIO3		84
-#define BCM281XX_PIN_MDMGPIO4		85
-#define BCM281XX_PIN_MDMGPIO5		86
-#define BCM281XX_PIN_MDMGPIO6		87
-#define BCM281XX_PIN_MDMGPIO7		88
-#define BCM281XX_PIN_MDMGPIO8		89
-#define BCM281XX_PIN_MPHI_DATA_0	90
-#define BCM281XX_PIN_MPHI_DATA_1	91
-#define BCM281XX_PIN_MPHI_DATA_2	92
-#define BCM281XX_PIN_MPHI_DATA_3	93
-#define BCM281XX_PIN_MPHI_DATA_4	94
-#define BCM281XX_PIN_MPHI_DATA_5	95
-#define BCM281XX_PIN_MPHI_DATA_6	96
-#define BCM281XX_PIN_MPHI_DATA_7	97
-#define BCM281XX_PIN_MPHI_DATA_8	98
-#define BCM281XX_PIN_MPHI_DATA_9	99
-#define BCM281XX_PIN_MPHI_DATA_10	100
-#define BCM281XX_PIN_MPHI_DATA_11	101
-#define BCM281XX_PIN_MPHI_DATA_12	102
-#define BCM281XX_PIN_MPHI_DATA_13	103
-#define BCM281XX_PIN_MPHI_DATA_14	104
-#define BCM281XX_PIN_MPHI_DATA_15	105
-#define BCM281XX_PIN_MPHI_HA0		106
-#define BCM281XX_PIN_MPHI_HAT0		107
-#define BCM281XX_PIN_MPHI_HAT1		108
-#define BCM281XX_PIN_MPHI_HCE0_N	109
-#define BCM281XX_PIN_MPHI_HCE1_N	110
-#define BCM281XX_PIN_MPHI_HRD_N		111
-#define BCM281XX_PIN_MPHI_HWR_N		112
-#define BCM281XX_PIN_MPHI_RUN0		113
-#define BCM281XX_PIN_MPHI_RUN1		114
-#define BCM281XX_PIN_MTX_SCAN_CLK	115
-#define BCM281XX_PIN_MTX_SCAN_DATA	116
-#define BCM281XX_PIN_NAND_AD_0		117
-#define BCM281XX_PIN_NAND_AD_1		118
-#define BCM281XX_PIN_NAND_AD_2		119
-#define BCM281XX_PIN_NAND_AD_3		120
-#define BCM281XX_PIN_NAND_AD_4		121
-#define BCM281XX_PIN_NAND_AD_5		122
-#define BCM281XX_PIN_NAND_AD_6		123
-#define BCM281XX_PIN_NAND_AD_7		124
-#define BCM281XX_PIN_NAND_ALE		125
-#define BCM281XX_PIN_NAND_CEN_0		126
-#define BCM281XX_PIN_NAND_CEN_1		127
-#define BCM281XX_PIN_NAND_CLE		128
-#define BCM281XX_PIN_NAND_OEN		129
-#define BCM281XX_PIN_NAND_RDY_0		130
-#define BCM281XX_PIN_NAND_RDY_1		131
-#define BCM281XX_PIN_NAND_WEN		132
-#define BCM281XX_PIN_NAND_WP		133
-#define BCM281XX_PIN_PC1		134
-#define BCM281XX_PIN_PC2		135
-#define BCM281XX_PIN_PMU_INT		136
-#define BCM281XX_PIN_PMU_SCL		137
-#define BCM281XX_PIN_PMU_SDA		138
-#define BCM281XX_PIN_RFST2G_MTSLOTEN3G	139
-#define BCM281XX_PIN_RGMII_0_RX_CTL	140
-#define BCM281XX_PIN_RGMII_0_RXC	141
-#define BCM281XX_PIN_RGMII_0_RXD_0	142
-#define BCM281XX_PIN_RGMII_0_RXD_1	143
-#define BCM281XX_PIN_RGMII_0_RXD_2	144
-#define BCM281XX_PIN_RGMII_0_RXD_3	145
-#define BCM281XX_PIN_RGMII_0_TX_CTL	146
-#define BCM281XX_PIN_RGMII_0_TXC	147
-#define BCM281XX_PIN_RGMII_0_TXD_0	148
-#define BCM281XX_PIN_RGMII_0_TXD_1	149
-#define BCM281XX_PIN_RGMII_0_TXD_2	150
-#define BCM281XX_PIN_RGMII_0_TXD_3	151
-#define BCM281XX_PIN_RGMII_1_RX_CTL	152
-#define BCM281XX_PIN_RGMII_1_RXC	153
-#define BCM281XX_PIN_RGMII_1_RXD_0	154
-#define BCM281XX_PIN_RGMII_1_RXD_1	155
-#define BCM281XX_PIN_RGMII_1_RXD_2	156
-#define BCM281XX_PIN_RGMII_1_RXD_3	157
-#define BCM281XX_PIN_RGMII_1_TX_CTL	158
-#define BCM281XX_PIN_RGMII_1_TXC	159
-#define BCM281XX_PIN_RGMII_1_TXD_0	160
-#define BCM281XX_PIN_RGMII_1_TXD_1	161
-#define BCM281XX_PIN_RGMII_1_TXD_2	162
-#define BCM281XX_PIN_RGMII_1_TXD_3	163
-#define BCM281XX_PIN_RGMII_GPIO_0	164
-#define BCM281XX_PIN_RGMII_GPIO_1	165
-#define BCM281XX_PIN_RGMII_GPIO_2	166
-#define BCM281XX_PIN_RGMII_GPIO_3	167
-#define BCM281XX_PIN_RTXDATA2G_TXDATA3G1	168
-#define BCM281XX_PIN_RTXEN2G_TXDATA3G2	169
-#define BCM281XX_PIN_RXDATA3G0		170
-#define BCM281XX_PIN_RXDATA3G1		171
-#define BCM281XX_PIN_RXDATA3G2		172
-#define BCM281XX_PIN_SDIO1_CLK		173
-#define BCM281XX_PIN_SDIO1_CMD		174
-#define BCM281XX_PIN_SDIO1_DATA_0	175
-#define BCM281XX_PIN_SDIO1_DATA_1	176
-#define BCM281XX_PIN_SDIO1_DATA_2	177
-#define BCM281XX_PIN_SDIO1_DATA_3	178
-#define BCM281XX_PIN_SDIO4_CLK		179
-#define BCM281XX_PIN_SDIO4_CMD		180
-#define BCM281XX_PIN_SDIO4_DATA_0	181
-#define BCM281XX_PIN_SDIO4_DATA_1	182
-#define BCM281XX_PIN_SDIO4_DATA_2	183
-#define BCM281XX_PIN_SDIO4_DATA_3	184
-#define BCM281XX_PIN_SIM_CLK		185
-#define BCM281XX_PIN_SIM_DATA		186
-#define BCM281XX_PIN_SIM_DET		187
-#define BCM281XX_PIN_SIM_RESETN		188
-#define BCM281XX_PIN_SIM2_CLK		189
-#define BCM281XX_PIN_SIM2_DATA		190
-#define BCM281XX_PIN_SIM2_DET		191
-#define BCM281XX_PIN_SIM2_RESETN	192
-#define BCM281XX_PIN_SRI_C		193
-#define BCM281XX_PIN_SRI_D		194
-#define BCM281XX_PIN_SRI_E		195
-#define BCM281XX_PIN_SSP_EXTCLK		196
-#define BCM281XX_PIN_SSP0_CLK		197
-#define BCM281XX_PIN_SSP0_FS		198
-#define BCM281XX_PIN_SSP0_RXD		199
-#define BCM281XX_PIN_SSP0_TXD		200
-#define BCM281XX_PIN_SSP2_CLK		201
-#define BCM281XX_PIN_SSP2_FS_0		202
-#define BCM281XX_PIN_SSP2_FS_1		203
-#define BCM281XX_PIN_SSP2_FS_2		204
-#define BCM281XX_PIN_SSP2_FS_3		205
-#define BCM281XX_PIN_SSP2_RXD_0		206
-#define BCM281XX_PIN_SSP2_RXD_1		207
-#define BCM281XX_PIN_SSP2_TXD_0		208
-#define BCM281XX_PIN_SSP2_TXD_1		209
-#define BCM281XX_PIN_SSP3_CLK		210
-#define BCM281XX_PIN_SSP3_FS		211
-#define BCM281XX_PIN_SSP3_RXD		212
-#define BCM281XX_PIN_SSP3_TXD		213
-#define BCM281XX_PIN_SSP4_CLK		214
-#define BCM281XX_PIN_SSP4_FS		215
-#define BCM281XX_PIN_SSP4_RXD		216
-#define BCM281XX_PIN_SSP4_TXD		217
-#define BCM281XX_PIN_SSP5_CLK		218
-#define BCM281XX_PIN_SSP5_FS		219
-#define BCM281XX_PIN_SSP5_RXD		220
-#define BCM281XX_PIN_SSP5_TXD		221
-#define BCM281XX_PIN_SSP6_CLK		222
-#define BCM281XX_PIN_SSP6_FS		223
-#define BCM281XX_PIN_SSP6_RXD		224
-#define BCM281XX_PIN_SSP6_TXD		225
-#define BCM281XX_PIN_STAT_1		226
-#define BCM281XX_PIN_STAT_2		227
-#define BCM281XX_PIN_SYSCLKEN		228
-#define BCM281XX_PIN_TRACECLK		229
-#define BCM281XX_PIN_TRACEDT00		230
-#define BCM281XX_PIN_TRACEDT01		231
-#define BCM281XX_PIN_TRACEDT02		232
-#define BCM281XX_PIN_TRACEDT03		233
-#define BCM281XX_PIN_TRACEDT04		234
-#define BCM281XX_PIN_TRACEDT05		235
-#define BCM281XX_PIN_TRACEDT06		236
-#define BCM281XX_PIN_TRACEDT07		237
-#define BCM281XX_PIN_TRACEDT08		238
-#define BCM281XX_PIN_TRACEDT09		239
-#define BCM281XX_PIN_TRACEDT10		240
-#define BCM281XX_PIN_TRACEDT11		241
-#define BCM281XX_PIN_TRACEDT12		242
-#define BCM281XX_PIN_TRACEDT13		243
-#define BCM281XX_PIN_TRACEDT14		244
-#define BCM281XX_PIN_TRACEDT15		245
-#define BCM281XX_PIN_TXDATA3G0		246
-#define BCM281XX_PIN_TXPWRIND		247
-#define BCM281XX_PIN_UARTB1_UCTS	248
-#define BCM281XX_PIN_UARTB1_URTS	249
-#define BCM281XX_PIN_UARTB1_URXD	250
-#define BCM281XX_PIN_UARTB1_UTXD	251
-#define BCM281XX_PIN_UARTB2_URXD	252
-#define BCM281XX_PIN_UARTB2_UTXD	253
-#define BCM281XX_PIN_UARTB3_UCTS	254
-#define BCM281XX_PIN_UARTB3_URTS	255
-#define BCM281XX_PIN_UARTB3_URXD	256
-#define BCM281XX_PIN_UARTB3_UTXD	257
-#define BCM281XX_PIN_UARTB4_UCTS	258
-#define BCM281XX_PIN_UARTB4_URTS	259
-#define BCM281XX_PIN_UARTB4_URXD	260
-#define BCM281XX_PIN_UARTB4_UTXD	261
-#define BCM281XX_PIN_VC_CAM1_SCL	262
-#define BCM281XX_PIN_VC_CAM1_SDA	263
-#define BCM281XX_PIN_VC_CAM2_SCL	264
-#define BCM281XX_PIN_VC_CAM2_SDA	265
-#define BCM281XX_PIN_VC_CAM3_SCL	266
-#define BCM281XX_PIN_VC_CAM3_SDA	267
-
-#define BCM281XX_PIN_DESC(a, b, c) \
-	{ .number = a, .name = b, .drv_data = &c##_pin }
-
-/*
- * Pin description definition.  The order here must be the same as defined in
- * the PADCTRLREG block in the RDB, since the pin number is used as an index
- * into this array.
- */
-static const struct pinctrl_pin_desc bcm281xx_pinctrl_pins[] = {
-	BCM281XX_PIN_DESC(BCM281XX_PIN_ADCSYNC, "adcsync", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BAT_RM, "bat_rm", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC1_SCL, "bsc1_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC1_SDA, "bsc1_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC2_SCL, "bsc2_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC2_SDA, "bsc2_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLASSGPWR, "classgpwr", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLK_CX8, "clk_cx8", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_0, "clkout_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_1, "clkout_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_2, "clkout_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_3, "clkout_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKREQ_IN_0, "clkreq_in_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKREQ_IN_1, "clkreq_in_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ1, "cws_sys_req1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ2, "cws_sys_req2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ3, "cws_sys_req3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC1_CLK, "digmic1_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC1_DQ, "digmic1_dq", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC2_CLK, "digmic2_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC2_DQ, "digmic2_dq", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN13, "gpen13", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN14, "gpen14", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN15, "gpen15", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO00, "gpio00", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO01, "gpio01", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO02, "gpio02", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO03, "gpio03", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO04, "gpio04", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO05, "gpio05", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO06, "gpio06", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO07, "gpio07", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO08, "gpio08", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO09, "gpio09", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO10, "gpio10", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO11, "gpio11", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO12, "gpio12", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO13, "gpio13", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO14, "gpio14", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPS_PABLANK, "gps_pablank", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPS_TMARK, "gps_tmark", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_HDMI_SCL, "hdmi_scl", hdmi),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_HDMI_SDA, "hdmi_sda", hdmi),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_IC_DM, "ic_dm", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_IC_DP, "ic_dp", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_0, "kp_col_ip_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_1, "kp_col_ip_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_2, "kp_col_ip_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_3, "kp_col_ip_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_0, "kp_row_op_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_1, "kp_row_op_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_2, "kp_row_op_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_3, "kp_row_op_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_0, "lcd_b_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_1, "lcd_b_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_2, "lcd_b_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_3, "lcd_b_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_4, "lcd_b_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_5, "lcd_b_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_6, "lcd_b_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_7, "lcd_b_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_0, "lcd_g_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_1, "lcd_g_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_2, "lcd_g_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_3, "lcd_g_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_4, "lcd_g_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_5, "lcd_g_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_6, "lcd_g_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_7, "lcd_g_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_HSYNC, "lcd_hsync", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_OE, "lcd_oe", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_PCLK, "lcd_pclk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_0, "lcd_r_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_1, "lcd_r_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_2, "lcd_r_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_3, "lcd_r_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_4, "lcd_r_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_5, "lcd_r_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_6, "lcd_r_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_7, "lcd_r_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_VSYNC, "lcd_vsync", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO0, "mdmgpio0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO1, "mdmgpio1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO2, "mdmgpio2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO3, "mdmgpio3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO4, "mdmgpio4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO5, "mdmgpio5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO6, "mdmgpio6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO7, "mdmgpio7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO8, "mdmgpio8", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_0, "mphi_data_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_1, "mphi_data_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_2, "mphi_data_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_3, "mphi_data_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_4, "mphi_data_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_5, "mphi_data_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_6, "mphi_data_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_7, "mphi_data_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_8, "mphi_data_8", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_9, "mphi_data_9", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_10, "mphi_data_10", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_11, "mphi_data_11", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_12, "mphi_data_12", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_13, "mphi_data_13", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_14, "mphi_data_14", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_15, "mphi_data_15", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HA0, "mphi_ha0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HAT0, "mphi_hat0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HAT1, "mphi_hat1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HCE0_N, "mphi_hce0_n", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HCE1_N, "mphi_hce1_n", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HRD_N, "mphi_hrd_n", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HWR_N, "mphi_hwr_n", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_RUN0, "mphi_run0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_RUN1, "mphi_run1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MTX_SCAN_CLK, "mtx_scan_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MTX_SCAN_DATA, "mtx_scan_data", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_0, "nand_ad_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_1, "nand_ad_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_2, "nand_ad_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_3, "nand_ad_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_4, "nand_ad_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_5, "nand_ad_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_6, "nand_ad_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_7, "nand_ad_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_ALE, "nand_ale", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CEN_0, "nand_cen_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CEN_1, "nand_cen_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CLE, "nand_cle", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_OEN, "nand_oen", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_RDY_0, "nand_rdy_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_RDY_1, "nand_rdy_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_WEN, "nand_wen", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_WP, "nand_wp", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PC1, "pc1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PC2, "pc2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_INT, "pmu_int", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_SCL, "pmu_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_SDA, "pmu_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RFST2G_MTSLOTEN3G, "rfst2g_mtsloten3g",
-		std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RX_CTL, "rgmii_0_rx_ctl", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXC, "rgmii_0_rxc", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_0, "rgmii_0_rxd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_1, "rgmii_0_rxd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_2, "rgmii_0_rxd_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_3, "rgmii_0_rxd_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TX_CTL, "rgmii_0_tx_ctl", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXC, "rgmii_0_txc", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_0, "rgmii_0_txd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_1, "rgmii_0_txd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_2, "rgmii_0_txd_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_3, "rgmii_0_txd_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RX_CTL, "rgmii_1_rx_ctl", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXC, "rgmii_1_rxc", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_0, "rgmii_1_rxd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_1, "rgmii_1_rxd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_2, "rgmii_1_rxd_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_3, "rgmii_1_rxd_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TX_CTL, "rgmii_1_tx_ctl", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXC, "rgmii_1_txc", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_0, "rgmii_1_txd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_1, "rgmii_1_txd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_2, "rgmii_1_txd_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_3, "rgmii_1_txd_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_0, "rgmii_gpio_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_1, "rgmii_gpio_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_2, "rgmii_gpio_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_3, "rgmii_gpio_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RTXDATA2G_TXDATA3G1,
-		"rtxdata2g_txdata3g1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RTXEN2G_TXDATA3G2, "rtxen2g_txdata3g2",
-		std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G0, "rxdata3g0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G1, "rxdata3g1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G2, "rxdata3g2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_CLK, "sdio1_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_CMD, "sdio1_cmd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_0, "sdio1_data_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_1, "sdio1_data_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_2, "sdio1_data_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_3, "sdio1_data_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_CLK, "sdio4_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_CMD, "sdio4_cmd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_0, "sdio4_data_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_1, "sdio4_data_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_2, "sdio4_data_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_3, "sdio4_data_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_CLK, "sim_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_DATA, "sim_data", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_DET, "sim_det", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_RESETN, "sim_resetn", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_CLK, "sim2_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_DATA, "sim2_data", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_DET, "sim2_det", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_RESETN, "sim2_resetn", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_C, "sri_c", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_D, "sri_d", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_E, "sri_e", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP_EXTCLK, "ssp_extclk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_CLK, "ssp0_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_FS, "ssp0_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_RXD, "ssp0_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_TXD, "ssp0_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_CLK, "ssp2_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_0, "ssp2_fs_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_1, "ssp2_fs_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_2, "ssp2_fs_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_3, "ssp2_fs_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_RXD_0, "ssp2_rxd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_RXD_1, "ssp2_rxd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_TXD_0, "ssp2_txd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_TXD_1, "ssp2_txd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_CLK, "ssp3_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_FS, "ssp3_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_RXD, "ssp3_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_TXD, "ssp3_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_CLK, "ssp4_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_FS, "ssp4_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_RXD, "ssp4_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_TXD, "ssp4_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_CLK, "ssp5_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_FS, "ssp5_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_RXD, "ssp5_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_TXD, "ssp5_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_CLK, "ssp6_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_FS, "ssp6_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_RXD, "ssp6_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_TXD, "ssp6_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_STAT_1, "stat_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_STAT_2, "stat_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SYSCLKEN, "sysclken", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACECLK, "traceclk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT00, "tracedt00", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT01, "tracedt01", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT02, "tracedt02", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT03, "tracedt03", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT04, "tracedt04", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT05, "tracedt05", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT06, "tracedt06", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT07, "tracedt07", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT08, "tracedt08", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT09, "tracedt09", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT10, "tracedt10", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT11, "tracedt11", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT12, "tracedt12", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT13, "tracedt13", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT14, "tracedt14", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT15, "tracedt15", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TXDATA3G0, "txdata3g0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TXPWRIND, "txpwrind", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_UCTS, "uartb1_ucts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_URTS, "uartb1_urts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_URXD, "uartb1_urxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_UTXD, "uartb1_utxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB2_URXD, "uartb2_urxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB2_UTXD, "uartb2_utxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_UCTS, "uartb3_ucts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_URTS, "uartb3_urts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_URXD, "uartb3_urxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_UTXD, "uartb3_utxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_UCTS, "uartb4_ucts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_URTS, "uartb4_urts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_URXD, "uartb4_urxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_UTXD, "uartb4_utxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM1_SCL, "vc_cam1_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM1_SDA, "vc_cam1_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM2_SCL, "vc_cam2_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM2_SDA, "vc_cam2_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM3_SCL, "vc_cam3_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM3_SDA, "vc_cam3_sda", i2c),
-};
-
-static const char * const bcm281xx_alt_groups[] = {
-	"adcsync",
-	"bat_rm",
-	"bsc1_scl",
-	"bsc1_sda",
-	"bsc2_scl",
-	"bsc2_sda",
-	"classgpwr",
-	"clk_cx8",
-	"clkout_0",
-	"clkout_1",
-	"clkout_2",
-	"clkout_3",
-	"clkreq_in_0",
-	"clkreq_in_1",
-	"cws_sys_req1",
-	"cws_sys_req2",
-	"cws_sys_req3",
-	"digmic1_clk",
-	"digmic1_dq",
-	"digmic2_clk",
-	"digmic2_dq",
-	"gpen13",
-	"gpen14",
-	"gpen15",
-	"gpio00",
-	"gpio01",
-	"gpio02",
-	"gpio03",
-	"gpio04",
-	"gpio05",
-	"gpio06",
-	"gpio07",
-	"gpio08",
-	"gpio09",
-	"gpio10",
-	"gpio11",
-	"gpio12",
-	"gpio13",
-	"gpio14",
-	"gps_pablank",
-	"gps_tmark",
-	"hdmi_scl",
-	"hdmi_sda",
-	"ic_dm",
-	"ic_dp",
-	"kp_col_ip_0",
-	"kp_col_ip_1",
-	"kp_col_ip_2",
-	"kp_col_ip_3",
-	"kp_row_op_0",
-	"kp_row_op_1",
-	"kp_row_op_2",
-	"kp_row_op_3",
-	"lcd_b_0",
-	"lcd_b_1",
-	"lcd_b_2",
-	"lcd_b_3",
-	"lcd_b_4",
-	"lcd_b_5",
-	"lcd_b_6",
-	"lcd_b_7",
-	"lcd_g_0",
-	"lcd_g_1",
-	"lcd_g_2",
-	"lcd_g_3",
-	"lcd_g_4",
-	"lcd_g_5",
-	"lcd_g_6",
-	"lcd_g_7",
-	"lcd_hsync",
-	"lcd_oe",
-	"lcd_pclk",
-	"lcd_r_0",
-	"lcd_r_1",
-	"lcd_r_2",
-	"lcd_r_3",
-	"lcd_r_4",
-	"lcd_r_5",
-	"lcd_r_6",
-	"lcd_r_7",
-	"lcd_vsync",
-	"mdmgpio0",
-	"mdmgpio1",
-	"mdmgpio2",
-	"mdmgpio3",
-	"mdmgpio4",
-	"mdmgpio5",
-	"mdmgpio6",
-	"mdmgpio7",
-	"mdmgpio8",
-	"mphi_data_0",
-	"mphi_data_1",
-	"mphi_data_2",
-	"mphi_data_3",
-	"mphi_data_4",
-	"mphi_data_5",
-	"mphi_data_6",
-	"mphi_data_7",
-	"mphi_data_8",
-	"mphi_data_9",
-	"mphi_data_10",
-	"mphi_data_11",
-	"mphi_data_12",
-	"mphi_data_13",
-	"mphi_data_14",
-	"mphi_data_15",
-	"mphi_ha0",
-	"mphi_hat0",
-	"mphi_hat1",
-	"mphi_hce0_n",
-	"mphi_hce1_n",
-	"mphi_hrd_n",
-	"mphi_hwr_n",
-	"mphi_run0",
-	"mphi_run1",
-	"mtx_scan_clk",
-	"mtx_scan_data",
-	"nand_ad_0",
-	"nand_ad_1",
-	"nand_ad_2",
-	"nand_ad_3",
-	"nand_ad_4",
-	"nand_ad_5",
-	"nand_ad_6",
-	"nand_ad_7",
-	"nand_ale",
-	"nand_cen_0",
-	"nand_cen_1",
-	"nand_cle",
-	"nand_oen",
-	"nand_rdy_0",
-	"nand_rdy_1",
-	"nand_wen",
-	"nand_wp",
-	"pc1",
-	"pc2",
-	"pmu_int",
-	"pmu_scl",
-	"pmu_sda",
-	"rfst2g_mtsloten3g",
-	"rgmii_0_rx_ctl",
-	"rgmii_0_rxc",
-	"rgmii_0_rxd_0",
-	"rgmii_0_rxd_1",
-	"rgmii_0_rxd_2",
-	"rgmii_0_rxd_3",
-	"rgmii_0_tx_ctl",
-	"rgmii_0_txc",
-	"rgmii_0_txd_0",
-	"rgmii_0_txd_1",
-	"rgmii_0_txd_2",
-	"rgmii_0_txd_3",
-	"rgmii_1_rx_ctl",
-	"rgmii_1_rxc",
-	"rgmii_1_rxd_0",
-	"rgmii_1_rxd_1",
-	"rgmii_1_rxd_2",
-	"rgmii_1_rxd_3",
-	"rgmii_1_tx_ctl",
-	"rgmii_1_txc",
-	"rgmii_1_txd_0",
-	"rgmii_1_txd_1",
-	"rgmii_1_txd_2",
-	"rgmii_1_txd_3",
-	"rgmii_gpio_0",
-	"rgmii_gpio_1",
-	"rgmii_gpio_2",
-	"rgmii_gpio_3",
-	"rtxdata2g_txdata3g1",
-	"rtxen2g_txdata3g2",
-	"rxdata3g0",
-	"rxdata3g1",
-	"rxdata3g2",
-	"sdio1_clk",
-	"sdio1_cmd",
-	"sdio1_data_0",
-	"sdio1_data_1",
-	"sdio1_data_2",
-	"sdio1_data_3",
-	"sdio4_clk",
-	"sdio4_cmd",
-	"sdio4_data_0",
-	"sdio4_data_1",
-	"sdio4_data_2",
-	"sdio4_data_3",
-	"sim_clk",
-	"sim_data",
-	"sim_det",
-	"sim_resetn",
-	"sim2_clk",
-	"sim2_data",
-	"sim2_det",
-	"sim2_resetn",
-	"sri_c",
-	"sri_d",
-	"sri_e",
-	"ssp_extclk",
-	"ssp0_clk",
-	"ssp0_fs",
-	"ssp0_rxd",
-	"ssp0_txd",
-	"ssp2_clk",
-	"ssp2_fs_0",
-	"ssp2_fs_1",
-	"ssp2_fs_2",
-	"ssp2_fs_3",
-	"ssp2_rxd_0",
-	"ssp2_rxd_1",
-	"ssp2_txd_0",
-	"ssp2_txd_1",
-	"ssp3_clk",
-	"ssp3_fs",
-	"ssp3_rxd",
-	"ssp3_txd",
-	"ssp4_clk",
-	"ssp4_fs",
-	"ssp4_rxd",
-	"ssp4_txd",
-	"ssp5_clk",
-	"ssp5_fs",
-	"ssp5_rxd",
-	"ssp5_txd",
-	"ssp6_clk",
-	"ssp6_fs",
-	"ssp6_rxd",
-	"ssp6_txd",
-	"stat_1",
-	"stat_2",
-	"sysclken",
-	"traceclk",
-	"tracedt00",
-	"tracedt01",
-	"tracedt02",
-	"tracedt03",
-	"tracedt04",
-	"tracedt05",
-	"tracedt06",
-	"tracedt07",
-	"tracedt08",
-	"tracedt09",
-	"tracedt10",
-	"tracedt11",
-	"tracedt12",
-	"tracedt13",
-	"tracedt14",
-	"tracedt15",
-	"txdata3g0",
-	"txpwrind",
-	"uartb1_ucts",
-	"uartb1_urts",
-	"uartb1_urxd",
-	"uartb1_utxd",
-	"uartb2_urxd",
-	"uartb2_utxd",
-	"uartb3_ucts",
-	"uartb3_urts",
-	"uartb3_urxd",
-	"uartb3_utxd",
-	"uartb4_ucts",
-	"uartb4_urts",
-	"uartb4_urxd",
-	"uartb4_utxd",
-	"vc_cam1_scl",
-	"vc_cam1_sda",
-	"vc_cam2_scl",
-	"vc_cam2_sda",
-	"vc_cam3_scl",
-	"vc_cam3_sda",
-};
-
-/* Every pin can implement all ALT1-ALT4 functions */
-#define BCM281XX_PIN_FUNCTION(fcn_name)			\
-{							\
-	.name = #fcn_name,				\
-	.groups = bcm281xx_alt_groups,			\
-	.ngroups = ARRAY_SIZE(bcm281xx_alt_groups),	\
-}
-
-static const struct bcm281xx_pin_function bcm281xx_functions[] = {
-	BCM281XX_PIN_FUNCTION(alt1),
-	BCM281XX_PIN_FUNCTION(alt2),
-	BCM281XX_PIN_FUNCTION(alt3),
-	BCM281XX_PIN_FUNCTION(alt4),
-};
-
-static struct bcm281xx_pinctrl_data bcm281xx_pinctrl = {
-	.pins = bcm281xx_pinctrl_pins,
-	.npins = ARRAY_SIZE(bcm281xx_pinctrl_pins),
-	.functions = bcm281xx_functions,
-	.nfunctions = ARRAY_SIZE(bcm281xx_functions),
-};
-
-static inline enum bcm281xx_pin_type pin_type_get(struct pinctrl_dev *pctldev,
-						  unsigned pin)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	if (pin >= pdata->npins)
-		return BCM281XX_PIN_TYPE_UNKNOWN;
-
-	return *(enum bcm281xx_pin_type *)(pdata->pins[pin].drv_data);
-}
-
-#define BCM281XX_PIN_SHIFT(type, param) \
-	(BCM281XX_ ## type ## _PIN_REG_ ## param ## _SHIFT)
-
-#define BCM281XX_PIN_MASK(type, param) \
-	(BCM281XX_ ## type ## _PIN_REG_ ## param ## _MASK)
-
-/*
- * This helper function is used to build up the value and mask used to write to
- * a pin register, but does not actually write to the register.
- */
-static inline void bcm281xx_pin_update(u32 *reg_val, u32 *reg_mask,
-				       u32 param_val, u32 param_shift,
-				       u32 param_mask)
-{
-	*reg_val &= ~param_mask;
-	*reg_val |= (param_val << param_shift) & param_mask;
-	*reg_mask |= param_mask;
-}
-
-static struct regmap_config bcm281xx_pinctrl_regmap_config = {
-	.reg_bits = 32,
-	.reg_stride = 4,
-	.val_bits = 32,
-	.max_register = BCM281XX_PIN_VC_CAM3_SDA,
-};
-
-static int bcm281xx_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	return pdata->npins;
-}
-
-static const char *bcm281xx_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
-						   unsigned group)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	return pdata->pins[group].name;
-}
-
-static int bcm281xx_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
-					   unsigned group,
-					   const unsigned **pins,
-					   unsigned *num_pins)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	*pins = &pdata->pins[group].number;
-	*num_pins = 1;
-
-	return 0;
-}
-
-static void bcm281xx_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
-					  struct seq_file *s,
-					  unsigned offset)
-{
-	seq_printf(s, " %s", dev_name(pctldev->dev));
-}
-
-static struct pinctrl_ops bcm281xx_pinctrl_ops = {
-	.get_groups_count = bcm281xx_pinctrl_get_groups_count,
-	.get_group_name = bcm281xx_pinctrl_get_group_name,
-	.get_group_pins = bcm281xx_pinctrl_get_group_pins,
-	.pin_dbg_show = bcm281xx_pinctrl_pin_dbg_show,
-	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
-	.dt_free_map = pinctrl_utils_dt_free_map,
-};
-
-static int bcm281xx_pinctrl_get_fcns_count(struct pinctrl_dev *pctldev)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	return pdata->nfunctions;
-}
-
-static const char *bcm281xx_pinctrl_get_fcn_name(struct pinctrl_dev *pctldev,
-						 unsigned function)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	return pdata->functions[function].name;
-}
-
-static int bcm281xx_pinctrl_get_fcn_groups(struct pinctrl_dev *pctldev,
-					   unsigned function,
-					   const char * const **groups,
-					   unsigned * const num_groups)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	*groups = pdata->functions[function].groups;
-	*num_groups = pdata->functions[function].ngroups;
-
-	return 0;
-}
-
-static int bcm281xx_pinmux_set(struct pinctrl_dev *pctldev,
-			       unsigned function,
-			       unsigned group)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	const struct bcm281xx_pin_function *f = &pdata->functions[function];
-	u32 offset = 4 * pdata->pins[group].number;
-	int rc = 0;
-
-	dev_dbg(pctldev->dev,
-		"%s(): Enable function %s (%d) of pin %s (%d) @offset 0x%x.\n",
-		__func__, f->name, function, pdata->pins[group].name,
-		pdata->pins[group].number, offset);
-
-	rc = regmap_update_bits(pdata->regmap, offset,
-		BCM281XX_PIN_REG_F_SEL_MASK,
-		function << BCM281XX_PIN_REG_F_SEL_SHIFT);
-	if (rc)
-		dev_err(pctldev->dev,
-			"Error updating register for pin %s (%d).\n",
-			pdata->pins[group].name, pdata->pins[group].number);
-
-	return rc;
-}
-
-static struct pinmux_ops bcm281xx_pinctrl_pinmux_ops = {
-	.get_functions_count = bcm281xx_pinctrl_get_fcns_count,
-	.get_function_name = bcm281xx_pinctrl_get_fcn_name,
-	.get_function_groups = bcm281xx_pinctrl_get_fcn_groups,
-	.set_mux = bcm281xx_pinmux_set,
-};
-
-static int bcm281xx_pinctrl_pin_config_get(struct pinctrl_dev *pctldev,
-					   unsigned pin,
-					   unsigned long *config)
-{
-	return -ENOTSUPP;
-}
-
-
-/* Goes through the configs and update register val/mask */
-static int bcm281xx_std_pin_update(struct pinctrl_dev *pctldev,
-				   unsigned pin,
-				   unsigned long *configs,
-				   unsigned num_configs,
-				   u32 *val,
-				   u32 *mask)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	int i;
-	enum pin_config_param param;
-	u16 arg;
-
-	for (i = 0; i < num_configs; i++) {
-		param = pinconf_to_config_param(configs[i]);
-		arg = pinconf_to_config_argument(configs[i]);
-
-		switch (param) {
-		case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
-			arg = (arg >= 1 ? 1 : 0);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(STD, HYST),
-				BCM281XX_PIN_MASK(STD, HYST));
-			break;
-		/*
-		 * The pin bias can only be one of pull-up, pull-down, or
-		 * disable.  The user does not need to specify a value for the
-		 * property, and the default value from pinconf-generic is
-		 * ignored.
-		 */
-		case PIN_CONFIG_BIAS_DISABLE:
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(STD, PULL_UP),
-				BCM281XX_PIN_MASK(STD, PULL_UP));
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(STD, PULL_DN),
-				BCM281XX_PIN_MASK(STD, PULL_DN));
-			break;
-
-		case PIN_CONFIG_BIAS_PULL_UP:
-			bcm281xx_pin_update(val, mask, 1,
-				BCM281XX_PIN_SHIFT(STD, PULL_UP),
-				BCM281XX_PIN_MASK(STD, PULL_UP));
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(STD, PULL_DN),
-				BCM281XX_PIN_MASK(STD, PULL_DN));
-			break;
-
-		case PIN_CONFIG_BIAS_PULL_DOWN:
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(STD, PULL_UP),
-				BCM281XX_PIN_MASK(STD, PULL_UP));
-			bcm281xx_pin_update(val, mask, 1,
-				BCM281XX_PIN_SHIFT(STD, PULL_DN),
-				BCM281XX_PIN_MASK(STD, PULL_DN));
-			break;
-
-		case PIN_CONFIG_SLEW_RATE:
-			arg = (arg >= 1 ? 1 : 0);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(STD, SLEW),
-				BCM281XX_PIN_MASK(STD, SLEW));
-			break;
-
-		case PIN_CONFIG_INPUT_ENABLE:
-			/* inversed since register is for input _disable_ */
-			arg = (arg >= 1 ? 0 : 1);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(STD, INPUT_DIS),
-				BCM281XX_PIN_MASK(STD, INPUT_DIS));
-			break;
-
-		case PIN_CONFIG_DRIVE_STRENGTH:
-			/* Valid range is 2-16 mA, even numbers only */
-			if ((arg < 2) || (arg > 16) || (arg % 2)) {
-				dev_err(pctldev->dev,
-					"Invalid Drive Strength value (%d) for "
-					"pin %s (%d). Valid values are "
-					"(2..16) mA, even numbers only.\n",
-					arg, pdata->pins[pin].name, pin);
-				return -EINVAL;
-			}
-			bcm281xx_pin_update(val, mask, (arg/2)-1,
-				BCM281XX_PIN_SHIFT(STD, DRV_STR),
-				BCM281XX_PIN_MASK(STD, DRV_STR));
-			break;
-
-		default:
-			dev_err(pctldev->dev,
-				"Unrecognized pin config %d for pin %s (%d).\n",
-				param, pdata->pins[pin].name, pin);
-			return -EINVAL;
-
-		} /* switch config */
-	} /* for each config */
-
-	return 0;
-}
-
-/*
- * The pull-up strength for an I2C pin is represented by bits 4-6 in the
- * register with the following mapping:
- *   0b000: No pull-up
- *   0b001: 1200 Ohm
- *   0b010: 1800 Ohm
- *   0b011: 720 Ohm
- *   0b100: 2700 Ohm
- *   0b101: 831 Ohm
- *   0b110: 1080 Ohm
- *   0b111: 568 Ohm
- * This array maps pull-up strength in Ohms to register values (1+index).
- */
-static const u16 bcm281xx_pullup_map[] = {
-	1200, 1800, 720, 2700, 831, 1080, 568
-};
-
-/* Goes through the configs and update register val/mask */
-static int bcm281xx_i2c_pin_update(struct pinctrl_dev *pctldev,
-				   unsigned pin,
-				   unsigned long *configs,
-				   unsigned num_configs,
-				   u32 *val,
-				   u32 *mask)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	int i, j;
-	enum pin_config_param param;
-	u16 arg;
-
-	for (i = 0; i < num_configs; i++) {
-		param = pinconf_to_config_param(configs[i]);
-		arg = pinconf_to_config_argument(configs[i]);
-
-		switch (param) {
-		case PIN_CONFIG_BIAS_PULL_UP:
-			for (j = 0; j < ARRAY_SIZE(bcm281xx_pullup_map); j++)
-				if (bcm281xx_pullup_map[j] == arg)
-					break;
-
-			if (j == ARRAY_SIZE(bcm281xx_pullup_map)) {
-				dev_err(pctldev->dev,
-					"Invalid pull-up value (%d) for pin %s "
-					"(%d). Valid values are 568, 720, 831, "
-					"1080, 1200, 1800, 2700 Ohms.\n",
-					arg, pdata->pins[pin].name, pin);
-				return -EINVAL;
-			}
-
-			bcm281xx_pin_update(val, mask, j+1,
-				BCM281XX_PIN_SHIFT(I2C, PULL_UP_STR),
-				BCM281XX_PIN_MASK(I2C, PULL_UP_STR));
-			break;
-
-		case PIN_CONFIG_BIAS_DISABLE:
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(I2C, PULL_UP_STR),
-				BCM281XX_PIN_MASK(I2C, PULL_UP_STR));
-			break;
-
-		case PIN_CONFIG_SLEW_RATE:
-			arg = (arg >= 1 ? 1 : 0);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(I2C, SLEW),
-				BCM281XX_PIN_MASK(I2C, SLEW));
-			break;
-
-		case PIN_CONFIG_INPUT_ENABLE:
-			/* inversed since register is for input _disable_ */
-			arg = (arg >= 1 ? 0 : 1);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(I2C, INPUT_DIS),
-				BCM281XX_PIN_MASK(I2C, INPUT_DIS));
-			break;
-
-		default:
-			dev_err(pctldev->dev,
-				"Unrecognized pin config %d for pin %s (%d).\n",
-				param, pdata->pins[pin].name, pin);
-			return -EINVAL;
-
-		} /* switch config */
-	} /* for each config */
-
-	return 0;
-}
-
-/* Goes through the configs and update register val/mask */
-static int bcm281xx_hdmi_pin_update(struct pinctrl_dev *pctldev,
-				    unsigned pin,
-				    unsigned long *configs,
-				    unsigned num_configs,
-				    u32 *val,
-				    u32 *mask)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	int i;
-	enum pin_config_param param;
-	u16 arg;
-
-	for (i = 0; i < num_configs; i++) {
-		param = pinconf_to_config_param(configs[i]);
-		arg = pinconf_to_config_argument(configs[i]);
-
-		switch (param) {
-		case PIN_CONFIG_SLEW_RATE:
-			arg = (arg >= 1 ? 1 : 0);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(HDMI, MODE),
-				BCM281XX_PIN_MASK(HDMI, MODE));
-			break;
-
-		case PIN_CONFIG_INPUT_ENABLE:
-			/* inversed since register is for input _disable_ */
-			arg = (arg >= 1 ? 0 : 1);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(HDMI, INPUT_DIS),
-				BCM281XX_PIN_MASK(HDMI, INPUT_DIS));
-			break;
-
-		default:
-			dev_err(pctldev->dev,
-				"Unrecognized pin config %d for pin %s (%d).\n",
-				param, pdata->pins[pin].name, pin);
-			return -EINVAL;
-
-		} /* switch config */
-	} /* for each config */
-
-	return 0;
-}
-
-static int bcm281xx_pinctrl_pin_config_set(struct pinctrl_dev *pctldev,
-					   unsigned pin,
-					   unsigned long *configs,
-					   unsigned num_configs)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	enum bcm281xx_pin_type pin_type;
-	u32 offset = 4 * pin;
-	u32 cfg_val, cfg_mask;
-	int rc;
-
-	cfg_val = 0;
-	cfg_mask = 0;
-	pin_type = pin_type_get(pctldev, pin);
-
-	/* Different pins have different configuration options */
-	switch (pin_type) {
-	case BCM281XX_PIN_TYPE_STD:
-		rc = bcm281xx_std_pin_update(pctldev, pin, configs,
-			num_configs, &cfg_val, &cfg_mask);
-		break;
-
-	case BCM281XX_PIN_TYPE_I2C:
-		rc = bcm281xx_i2c_pin_update(pctldev, pin, configs,
-			num_configs, &cfg_val, &cfg_mask);
-		break;
-
-	case BCM281XX_PIN_TYPE_HDMI:
-		rc = bcm281xx_hdmi_pin_update(pctldev, pin, configs,
-			num_configs, &cfg_val, &cfg_mask);
-		break;
-
-	default:
-		dev_err(pctldev->dev, "Unknown pin type for pin %s (%d).\n",
-			pdata->pins[pin].name, pin);
-		return -EINVAL;
-
-	} /* switch pin type */
-
-	if (rc)
-		return rc;
-
-	dev_dbg(pctldev->dev,
-		"%s(): Set pin %s (%d) with config 0x%x, mask 0x%x\n",
-		__func__, pdata->pins[pin].name, pin, cfg_val, cfg_mask);
-
-	rc = regmap_update_bits(pdata->regmap, offset, cfg_mask, cfg_val);
-	if (rc) {
-		dev_err(pctldev->dev,
-			"Error updating register for pin %s (%d).\n",
-			pdata->pins[pin].name, pin);
-		return rc;
-	}
-
-	return 0;
-}
-
-static struct pinconf_ops bcm281xx_pinctrl_pinconf_ops = {
-	.pin_config_get = bcm281xx_pinctrl_pin_config_get,
-	.pin_config_set = bcm281xx_pinctrl_pin_config_set,
-};
-
-static struct pinctrl_desc bcm281xx_pinctrl_desc = {
-	/* name, pins, npins members initialized in probe function */
-	.pctlops = &bcm281xx_pinctrl_ops,
-	.pmxops = &bcm281xx_pinctrl_pinmux_ops,
-	.confops = &bcm281xx_pinctrl_pinconf_ops,
-	.owner = THIS_MODULE,
-};
-
-static int __init bcm281xx_pinctrl_probe(struct platform_device *pdev)
-{
-	struct bcm281xx_pinctrl_data *pdata = &bcm281xx_pinctrl;
-	struct resource *res;
-	struct pinctrl_dev *pctl;
-
-	/* So far We can assume there is only 1 bank of registers */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	pdata->reg_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(pdata->reg_base)) {
-		dev_err(&pdev->dev, "Failed to ioremap MEM resource\n");
-		return -ENODEV;
-	}
-
-	/* Initialize the dynamic part of pinctrl_desc */
-	pdata->regmap = devm_regmap_init_mmio(&pdev->dev, pdata->reg_base,
-		&bcm281xx_pinctrl_regmap_config);
-	if (IS_ERR(pdata->regmap)) {
-		dev_err(&pdev->dev, "Regmap MMIO init failed.\n");
-		return -ENODEV;
-	}
-
-	bcm281xx_pinctrl_desc.name = dev_name(&pdev->dev);
-	bcm281xx_pinctrl_desc.pins = bcm281xx_pinctrl.pins;
-	bcm281xx_pinctrl_desc.npins = bcm281xx_pinctrl.npins;
-
-	pctl = pinctrl_register(&bcm281xx_pinctrl_desc,
-				&pdev->dev,
-				pdata);
-	if (!pctl) {
-		dev_err(&pdev->dev, "Failed to register pinctrl\n");
-		return -ENODEV;
-	}
-
-	platform_set_drvdata(pdev, pdata);
-
-	return 0;
-}
-
-static struct of_device_id bcm281xx_pinctrl_of_match[] = {
-	{ .compatible = "brcm,bcm11351-pinctrl", },
-	{ },
-};
-
-static struct platform_driver bcm281xx_pinctrl_driver = {
-	.driver = {
-		.name = "bcm281xx-pinctrl",
-		.of_match_table = bcm281xx_pinctrl_of_match,
-	},
-};
-
-module_platform_driver_probe(bcm281xx_pinctrl_driver, bcm281xx_pinctrl_probe);
-
-MODULE_AUTHOR("Broadcom Corporation <bcm-kernel-feedback-list@broadcom.com>");
-MODULE_AUTHOR("Sherman Yin <syin@broadcom.com>");
-MODULE_DESCRIPTION("Broadcom BCM281xx pinctrl driver");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/pinctrl-bcm2835.c b/drivers/pinctrl/pinctrl-bcm2835.c
deleted file mode 100644
index 9aa8a3f..0000000
--- a/drivers/pinctrl/pinctrl-bcm2835.c
+++ /dev/null
@@ -1,1072 +0,0 @@
-/*
- * Driver for Broadcom BCM2835 GPIO unit (pinctrl + GPIO)
- *
- * Copyright (C) 2012 Chris Boot, Simon Arlott, Stephen Warren
- *
- * This driver is inspired by:
- * pinctrl-nomadik.c, please see original file for copyright information
- * pinctrl-tegra.c, please see original file for copyright information
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/bitmap.h>
-#include <linux/bug.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/irqdesc.h>
-#include <linux/irqdomain.h>
-#include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/pinctrl/machine.h>
-#include <linux/pinctrl/pinconf.h>
-#include <linux/pinctrl/pinctrl.h>
-#include <linux/pinctrl/pinmux.h>
-#include <linux/platform_device.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-
-#define MODULE_NAME "pinctrl-bcm2835"
-#define BCM2835_NUM_GPIOS 54
-#define BCM2835_NUM_BANKS 2
-
-#define BCM2835_PIN_BITMAP_SZ \
-	DIV_ROUND_UP(BCM2835_NUM_GPIOS, sizeof(unsigned long) * 8)
-
-/* GPIO register offsets */
-#define GPFSEL0		0x0	/* Function Select */
-#define GPSET0		0x1c	/* Pin Output Set */
-#define GPCLR0		0x28	/* Pin Output Clear */
-#define GPLEV0		0x34	/* Pin Level */
-#define GPEDS0		0x40	/* Pin Event Detect Status */
-#define GPREN0		0x4c	/* Pin Rising Edge Detect Enable */
-#define GPFEN0		0x58	/* Pin Falling Edge Detect Enable */
-#define GPHEN0		0x64	/* Pin High Detect Enable */
-#define GPLEN0		0x70	/* Pin Low Detect Enable */
-#define GPAREN0		0x7c	/* Pin Async Rising Edge Detect */
-#define GPAFEN0		0x88	/* Pin Async Falling Edge Detect */
-#define GPPUD		0x94	/* Pin Pull-up/down Enable */
-#define GPPUDCLK0	0x98	/* Pin Pull-up/down Enable Clock */
-
-#define FSEL_REG(p)		(GPFSEL0 + (((p) / 10) * 4))
-#define FSEL_SHIFT(p)		(((p) % 10) * 3)
-#define GPIO_REG_OFFSET(p)	((p) / 32)
-#define GPIO_REG_SHIFT(p)	((p) % 32)
-
-enum bcm2835_pinconf_param {
-	/* argument: bcm2835_pinconf_pull */
-	BCM2835_PINCONF_PARAM_PULL,
-};
-
-enum bcm2835_pinconf_pull {
-	BCM2835_PINCONFIG_PULL_NONE,
-	BCM2835_PINCONFIG_PULL_DOWN,
-	BCM2835_PINCONFIG_PULL_UP,
-};
-
-#define BCM2835_PINCONF_PACK(_param_, _arg_) ((_param_) << 16 | (_arg_))
-#define BCM2835_PINCONF_UNPACK_PARAM(_conf_) ((_conf_) >> 16)
-#define BCM2835_PINCONF_UNPACK_ARG(_conf_) ((_conf_) & 0xffff)
-
-struct bcm2835_gpio_irqdata {
-	struct bcm2835_pinctrl *pc;
-	int bank;
-};
-
-struct bcm2835_pinctrl {
-	struct device *dev;
-	void __iomem *base;
-	int irq[BCM2835_NUM_BANKS];
-
-	/* note: locking assumes each bank will have its own unsigned long */
-	unsigned long enabled_irq_map[BCM2835_NUM_BANKS];
-	unsigned int irq_type[BCM2835_NUM_GPIOS];
-
-	struct pinctrl_dev *pctl_dev;
-	struct irq_domain *irq_domain;
-	struct gpio_chip gpio_chip;
-	struct pinctrl_gpio_range gpio_range;
-
-	struct bcm2835_gpio_irqdata irq_data[BCM2835_NUM_BANKS];
-	spinlock_t irq_lock[BCM2835_NUM_BANKS];
-};
-
-static struct lock_class_key gpio_lock_class;
-
-/* pins are just named GPIO0..GPIO53 */
-#define BCM2835_GPIO_PIN(a) PINCTRL_PIN(a, "gpio" #a)
-static struct pinctrl_pin_desc bcm2835_gpio_pins[] = {
-	BCM2835_GPIO_PIN(0),
-	BCM2835_GPIO_PIN(1),
-	BCM2835_GPIO_PIN(2),
-	BCM2835_GPIO_PIN(3),
-	BCM2835_GPIO_PIN(4),
-	BCM2835_GPIO_PIN(5),
-	BCM2835_GPIO_PIN(6),
-	BCM2835_GPIO_PIN(7),
-	BCM2835_GPIO_PIN(8),
-	BCM2835_GPIO_PIN(9),
-	BCM2835_GPIO_PIN(10),
-	BCM2835_GPIO_PIN(11),
-	BCM2835_GPIO_PIN(12),
-	BCM2835_GPIO_PIN(13),
-	BCM2835_GPIO_PIN(14),
-	BCM2835_GPIO_PIN(15),
-	BCM2835_GPIO_PIN(16),
-	BCM2835_GPIO_PIN(17),
-	BCM2835_GPIO_PIN(18),
-	BCM2835_GPIO_PIN(19),
-	BCM2835_GPIO_PIN(20),
-	BCM2835_GPIO_PIN(21),
-	BCM2835_GPIO_PIN(22),
-	BCM2835_GPIO_PIN(23),
-	BCM2835_GPIO_PIN(24),
-	BCM2835_GPIO_PIN(25),
-	BCM2835_GPIO_PIN(26),
-	BCM2835_GPIO_PIN(27),
-	BCM2835_GPIO_PIN(28),
-	BCM2835_GPIO_PIN(29),
-	BCM2835_GPIO_PIN(30),
-	BCM2835_GPIO_PIN(31),
-	BCM2835_GPIO_PIN(32),
-	BCM2835_GPIO_PIN(33),
-	BCM2835_GPIO_PIN(34),
-	BCM2835_GPIO_PIN(35),
-	BCM2835_GPIO_PIN(36),
-	BCM2835_GPIO_PIN(37),
-	BCM2835_GPIO_PIN(38),
-	BCM2835_GPIO_PIN(39),
-	BCM2835_GPIO_PIN(40),
-	BCM2835_GPIO_PIN(41),
-	BCM2835_GPIO_PIN(42),
-	BCM2835_GPIO_PIN(43),
-	BCM2835_GPIO_PIN(44),
-	BCM2835_GPIO_PIN(45),
-	BCM2835_GPIO_PIN(46),
-	BCM2835_GPIO_PIN(47),
-	BCM2835_GPIO_PIN(48),
-	BCM2835_GPIO_PIN(49),
-	BCM2835_GPIO_PIN(50),
-	BCM2835_GPIO_PIN(51),
-	BCM2835_GPIO_PIN(52),
-	BCM2835_GPIO_PIN(53),
-};
-
-/* one pin per group */
-static const char * const bcm2835_gpio_groups[] = {
-	"gpio0",
-	"gpio1",
-	"gpio2",
-	"gpio3",
-	"gpio4",
-	"gpio5",
-	"gpio6",
-	"gpio7",
-	"gpio8",
-	"gpio9",
-	"gpio10",
-	"gpio11",
-	"gpio12",
-	"gpio13",
-	"gpio14",
-	"gpio15",
-	"gpio16",
-	"gpio17",
-	"gpio18",
-	"gpio19",
-	"gpio20",
-	"gpio21",
-	"gpio22",
-	"gpio23",
-	"gpio24",
-	"gpio25",
-	"gpio26",
-	"gpio27",
-	"gpio28",
-	"gpio29",
-	"gpio30",
-	"gpio31",
-	"gpio32",
-	"gpio33",
-	"gpio34",
-	"gpio35",
-	"gpio36",
-	"gpio37",
-	"gpio38",
-	"gpio39",
-	"gpio40",
-	"gpio41",
-	"gpio42",
-	"gpio43",
-	"gpio44",
-	"gpio45",
-	"gpio46",
-	"gpio47",
-	"gpio48",
-	"gpio49",
-	"gpio50",
-	"gpio51",
-	"gpio52",
-	"gpio53",
-};
-
-enum bcm2835_fsel {
-	BCM2835_FSEL_GPIO_IN = 0,
-	BCM2835_FSEL_GPIO_OUT = 1,
-	BCM2835_FSEL_ALT0 = 4,
-	BCM2835_FSEL_ALT1 = 5,
-	BCM2835_FSEL_ALT2 = 6,
-	BCM2835_FSEL_ALT3 = 7,
-	BCM2835_FSEL_ALT4 = 3,
-	BCM2835_FSEL_ALT5 = 2,
-	BCM2835_FSEL_COUNT = 8,
-	BCM2835_FSEL_MASK = 0x7,
-};
-
-static const char * const bcm2835_functions[BCM2835_FSEL_COUNT] = {
-	[BCM2835_FSEL_GPIO_IN] = "gpio_in",
-	[BCM2835_FSEL_GPIO_OUT] = "gpio_out",
-	[BCM2835_FSEL_ALT0] = "alt0",
-	[BCM2835_FSEL_ALT1] = "alt1",
-	[BCM2835_FSEL_ALT2] = "alt2",
-	[BCM2835_FSEL_ALT3] = "alt3",
-	[BCM2835_FSEL_ALT4] = "alt4",
-	[BCM2835_FSEL_ALT5] = "alt5",
-};
-
-static const char * const irq_type_names[] = {
-	[IRQ_TYPE_NONE] = "none",
-	[IRQ_TYPE_EDGE_RISING] = "edge-rising",
-	[IRQ_TYPE_EDGE_FALLING] = "edge-falling",
-	[IRQ_TYPE_EDGE_BOTH] = "edge-both",
-	[IRQ_TYPE_LEVEL_HIGH] = "level-high",
-	[IRQ_TYPE_LEVEL_LOW] = "level-low",
-};
-
-static inline u32 bcm2835_gpio_rd(struct bcm2835_pinctrl *pc, unsigned reg)
-{
-	return readl(pc->base + reg);
-}
-
-static inline void bcm2835_gpio_wr(struct bcm2835_pinctrl *pc, unsigned reg,
-		u32 val)
-{
-	writel(val, pc->base + reg);
-}
-
-static inline int bcm2835_gpio_get_bit(struct bcm2835_pinctrl *pc, unsigned reg,
-		unsigned bit)
-{
-	reg += GPIO_REG_OFFSET(bit) * 4;
-	return (bcm2835_gpio_rd(pc, reg) >> GPIO_REG_SHIFT(bit)) & 1;
-}
-
-/* note NOT a read/modify/write cycle */
-static inline void bcm2835_gpio_set_bit(struct bcm2835_pinctrl *pc,
-		unsigned reg, unsigned bit)
-{
-	reg += GPIO_REG_OFFSET(bit) * 4;
-	bcm2835_gpio_wr(pc, reg, BIT(GPIO_REG_SHIFT(bit)));
-}
-
-static inline enum bcm2835_fsel bcm2835_pinctrl_fsel_get(
-		struct bcm2835_pinctrl *pc, unsigned pin)
-{
-	u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
-	enum bcm2835_fsel status = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
-
-	dev_dbg(pc->dev, "get %08x (%u => %s)\n", val, pin,
-			bcm2835_functions[status]);
-
-	return status;
-}
-
-static inline void bcm2835_pinctrl_fsel_set(
-		struct bcm2835_pinctrl *pc, unsigned pin,
-		enum bcm2835_fsel fsel)
-{
-	u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
-	enum bcm2835_fsel cur = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
-
-	dev_dbg(pc->dev, "read %08x (%u => %s)\n", val, pin,
-			bcm2835_functions[cur]);
-
-	if (cur == fsel)
-		return;
-
-	if (cur != BCM2835_FSEL_GPIO_IN && fsel != BCM2835_FSEL_GPIO_IN) {
-		/* always transition through GPIO_IN */
-		val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
-		val |= BCM2835_FSEL_GPIO_IN << FSEL_SHIFT(pin);
-
-		dev_dbg(pc->dev, "trans %08x (%u <= %s)\n", val, pin,
-				bcm2835_functions[BCM2835_FSEL_GPIO_IN]);
-		bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
-	}
-
-	val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
-	val |= fsel << FSEL_SHIFT(pin);
-
-	dev_dbg(pc->dev, "write %08x (%u <= %s)\n", val, pin,
-			bcm2835_functions[fsel]);
-	bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
-}
-
-static int bcm2835_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
-	return pinctrl_request_gpio(chip->base + offset);
-}
-
-static void bcm2835_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
-	pinctrl_free_gpio(chip->base + offset);
-}
-
-static int bcm2835_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
-	return pinctrl_gpio_direction_input(chip->base + offset);
-}
-
-static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
-	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
-
-	return bcm2835_gpio_get_bit(pc, GPLEV0, offset);
-}
-
-static int bcm2835_gpio_direction_output(struct gpio_chip *chip,
-		unsigned offset, int value)
-{
-	return pinctrl_gpio_direction_output(chip->base + offset);
-}
-
-static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
-	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
-
-	bcm2835_gpio_set_bit(pc, value ? GPSET0 : GPCLR0, offset);
-}
-
-static int bcm2835_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
-
-	return irq_linear_revmap(pc->irq_domain, offset);
-}
-
-static struct gpio_chip bcm2835_gpio_chip = {
-	.label = MODULE_NAME,
-	.owner = THIS_MODULE,
-	.request = bcm2835_gpio_request,
-	.free = bcm2835_gpio_free,
-	.direction_input = bcm2835_gpio_direction_input,
-	.direction_output = bcm2835_gpio_direction_output,
-	.get = bcm2835_gpio_get,
-	.set = bcm2835_gpio_set,
-	.to_irq = bcm2835_gpio_to_irq,
-	.base = -1,
-	.ngpio = BCM2835_NUM_GPIOS,
-	.can_sleep = false,
-};
-
-static irqreturn_t bcm2835_gpio_irq_handler(int irq, void *dev_id)
-{
-	struct bcm2835_gpio_irqdata *irqdata = dev_id;
-	struct bcm2835_pinctrl *pc = irqdata->pc;
-	int bank = irqdata->bank;
-	unsigned long events;
-	unsigned offset;
-	unsigned gpio;
-	unsigned int type;
-
-	events = bcm2835_gpio_rd(pc, GPEDS0 + bank * 4);
-	events &= pc->enabled_irq_map[bank];
-	for_each_set_bit(offset, &events, 32) {
-		gpio = (32 * bank) + offset;
-		type = pc->irq_type[gpio];
-
-		/* ack edge triggered IRQs immediately */
-		if (!(type & IRQ_TYPE_LEVEL_MASK))
-			bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
-
-		generic_handle_irq(irq_linear_revmap(pc->irq_domain, gpio));
-
-		/* ack level triggered IRQ after handling them */
-		if (type & IRQ_TYPE_LEVEL_MASK)
-			bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
-	}
-	return events ? IRQ_HANDLED : IRQ_NONE;
-}
-
-static inline void __bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
-	unsigned reg, unsigned offset, bool enable)
-{
-	u32 value;
-	reg += GPIO_REG_OFFSET(offset) * 4;
-	value = bcm2835_gpio_rd(pc, reg);
-	if (enable)
-		value |= BIT(GPIO_REG_SHIFT(offset));
-	else
-		value &= ~(BIT(GPIO_REG_SHIFT(offset)));
-	bcm2835_gpio_wr(pc, reg, value);
-}
-
-/* fast path for IRQ handler */
-static void bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
-	unsigned offset, bool enable)
-{
-	switch (pc->irq_type[offset]) {
-	case IRQ_TYPE_EDGE_RISING:
-		__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
-		break;
-
-	case IRQ_TYPE_EDGE_FALLING:
-		__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
-		break;
-
-	case IRQ_TYPE_EDGE_BOTH:
-		__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
-		__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
-		break;
-
-	case IRQ_TYPE_LEVEL_HIGH:
-		__bcm2835_gpio_irq_config(pc, GPHEN0, offset, enable);
-		break;
-
-	case IRQ_TYPE_LEVEL_LOW:
-		__bcm2835_gpio_irq_config(pc, GPLEN0, offset, enable);
-		break;
-	}
-}
-
-static void bcm2835_gpio_irq_enable(struct irq_data *data)
-{
-	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
-	unsigned gpio = irqd_to_hwirq(data);
-	unsigned offset = GPIO_REG_SHIFT(gpio);
-	unsigned bank = GPIO_REG_OFFSET(gpio);
-	unsigned long flags;
-
-	spin_lock_irqsave(&pc->irq_lock[bank], flags);
-	set_bit(offset, &pc->enabled_irq_map[bank]);
-	bcm2835_gpio_irq_config(pc, gpio, true);
-	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
-}
-
-static void bcm2835_gpio_irq_disable(struct irq_data *data)
-{
-	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
-	unsigned gpio = irqd_to_hwirq(data);
-	unsigned offset = GPIO_REG_SHIFT(gpio);
-	unsigned bank = GPIO_REG_OFFSET(gpio);
-	unsigned long flags;
-
-	spin_lock_irqsave(&pc->irq_lock[bank], flags);
-	bcm2835_gpio_irq_config(pc, gpio, false);
-	clear_bit(offset, &pc->enabled_irq_map[bank]);
-	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
-}
-
-static int __bcm2835_gpio_irq_set_type_disabled(struct bcm2835_pinctrl *pc,
-	unsigned offset, unsigned int type)
-{
-	switch (type) {
-	case IRQ_TYPE_NONE:
-	case IRQ_TYPE_EDGE_RISING:
-	case IRQ_TYPE_EDGE_FALLING:
-	case IRQ_TYPE_EDGE_BOTH:
-	case IRQ_TYPE_LEVEL_HIGH:
-	case IRQ_TYPE_LEVEL_LOW:
-		pc->irq_type[offset] = type;
-		break;
-
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-/* slower path for reconfiguring IRQ type */
-static int __bcm2835_gpio_irq_set_type_enabled(struct bcm2835_pinctrl *pc,
-	unsigned offset, unsigned int type)
-{
-	switch (type) {
-	case IRQ_TYPE_NONE:
-		if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-		}
-		break;
-
-	case IRQ_TYPE_EDGE_RISING:
-		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
-			/* RISING already enabled, disable FALLING */
-			pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-		} else if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-			bcm2835_gpio_irq_config(pc, offset, true);
-		}
-		break;
-
-	case IRQ_TYPE_EDGE_FALLING:
-		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
-			/* FALLING already enabled, disable RISING */
-			pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-		} else if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-			bcm2835_gpio_irq_config(pc, offset, true);
-		}
-		break;
-
-	case IRQ_TYPE_EDGE_BOTH:
-		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_RISING) {
-			/* RISING already enabled, enable FALLING too */
-			pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
-			bcm2835_gpio_irq_config(pc, offset, true);
-			pc->irq_type[offset] = type;
-		} else if (pc->irq_type[offset] == IRQ_TYPE_EDGE_FALLING) {
-			/* FALLING already enabled, enable RISING too */
-			pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
-			bcm2835_gpio_irq_config(pc, offset, true);
-			pc->irq_type[offset] = type;
-		} else if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-			bcm2835_gpio_irq_config(pc, offset, true);
-		}
-		break;
-
-	case IRQ_TYPE_LEVEL_HIGH:
-	case IRQ_TYPE_LEVEL_LOW:
-		if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-			bcm2835_gpio_irq_config(pc, offset, true);
-		}
-		break;
-
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static int bcm2835_gpio_irq_set_type(struct irq_data *data, unsigned int type)
-{
-	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
-	unsigned gpio = irqd_to_hwirq(data);
-	unsigned offset = GPIO_REG_SHIFT(gpio);
-	unsigned bank = GPIO_REG_OFFSET(gpio);
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&pc->irq_lock[bank], flags);
-
-	if (test_bit(offset, &pc->enabled_irq_map[bank]))
-		ret = __bcm2835_gpio_irq_set_type_enabled(pc, gpio, type);
-	else
-		ret = __bcm2835_gpio_irq_set_type_disabled(pc, gpio, type);
-
-	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
-
-	return ret;
-}
-
-static struct irq_chip bcm2835_gpio_irq_chip = {
-	.name = MODULE_NAME,
-	.irq_enable = bcm2835_gpio_irq_enable,
-	.irq_disable = bcm2835_gpio_irq_disable,
-	.irq_set_type = bcm2835_gpio_irq_set_type,
-};
-
-static int bcm2835_pctl_get_groups_count(struct pinctrl_dev *pctldev)
-{
-	return ARRAY_SIZE(bcm2835_gpio_groups);
-}
-
-static const char *bcm2835_pctl_get_group_name(struct pinctrl_dev *pctldev,
-		unsigned selector)
-{
-	return bcm2835_gpio_groups[selector];
-}
-
-static int bcm2835_pctl_get_group_pins(struct pinctrl_dev *pctldev,
-		unsigned selector,
-		const unsigned **pins,
-		unsigned *num_pins)
-{
-	*pins = &bcm2835_gpio_pins[selector].number;
-	*num_pins = 1;
-
-	return 0;
-}
-
-static void bcm2835_pctl_pin_dbg_show(struct pinctrl_dev *pctldev,
-		struct seq_file *s,
-		unsigned offset)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-	enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);
-	const char *fname = bcm2835_functions[fsel];
-	int value = bcm2835_gpio_get_bit(pc, GPLEV0, offset);
-	int irq = irq_find_mapping(pc->irq_domain, offset);
-
-	seq_printf(s, "function %s in %s; irq %d (%s)",
-		fname, value ? "hi" : "lo",
-		irq, irq_type_names[pc->irq_type[offset]]);
-}
-
-static void bcm2835_pctl_dt_free_map(struct pinctrl_dev *pctldev,
-		struct pinctrl_map *maps, unsigned num_maps)
-{
-	int i;
-
-	for (i = 0; i < num_maps; i++)
-		if (maps[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
-			kfree(maps[i].data.configs.configs);
-
-	kfree(maps);
-}
-
-static int bcm2835_pctl_dt_node_to_map_func(struct bcm2835_pinctrl *pc,
-		struct device_node *np, u32 pin, u32 fnum,
-		struct pinctrl_map **maps)
-{
-	struct pinctrl_map *map = *maps;
-
-	if (fnum >= ARRAY_SIZE(bcm2835_functions)) {
-		dev_err(pc->dev, "%s: invalid brcm,function %d\n",
-			of_node_full_name(np), fnum);
-		return -EINVAL;
-	}
-
-	map->type = PIN_MAP_TYPE_MUX_GROUP;
-	map->data.mux.group = bcm2835_gpio_groups[pin];
-	map->data.mux.function = bcm2835_functions[fnum];
-	(*maps)++;
-
-	return 0;
-}
-
-static int bcm2835_pctl_dt_node_to_map_pull(struct bcm2835_pinctrl *pc,
-		struct device_node *np, u32 pin, u32 pull,
-		struct pinctrl_map **maps)
-{
-	struct pinctrl_map *map = *maps;
-	unsigned long *configs;
-
-	if (pull > 2) {
-		dev_err(pc->dev, "%s: invalid brcm,pull %d\n",
-			of_node_full_name(np), pull);
-		return -EINVAL;
-	}
-
-	configs = kzalloc(sizeof(*configs), GFP_KERNEL);
-	if (!configs)
-		return -ENOMEM;
-	configs[0] = BCM2835_PINCONF_PACK(BCM2835_PINCONF_PARAM_PULL, pull);
-
-	map->type = PIN_MAP_TYPE_CONFIGS_PIN;
-	map->data.configs.group_or_pin = bcm2835_gpio_pins[pin].name;
-	map->data.configs.configs = configs;
-	map->data.configs.num_configs = 1;
-	(*maps)++;
-
-	return 0;
-}
-
-static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
-		struct device_node *np,
-		struct pinctrl_map **map, unsigned *num_maps)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-	struct property *pins, *funcs, *pulls;
-	int num_pins, num_funcs, num_pulls, maps_per_pin;
-	struct pinctrl_map *maps, *cur_map;
-	int i, err;
-	u32 pin, func, pull;
-
-	pins = of_find_property(np, "brcm,pins", NULL);
-	if (!pins) {
-		dev_err(pc->dev, "%s: missing brcm,pins property\n",
-				of_node_full_name(np));
-		return -EINVAL;
-	}
-
-	funcs = of_find_property(np, "brcm,function", NULL);
-	pulls = of_find_property(np, "brcm,pull", NULL);
-
-	if (!funcs && !pulls) {
-		dev_err(pc->dev,
-			"%s: neither brcm,function nor brcm,pull specified\n",
-			of_node_full_name(np));
-		return -EINVAL;
-	}
-
-	num_pins = pins->length / 4;
-	num_funcs = funcs ? (funcs->length / 4) : 0;
-	num_pulls = pulls ? (pulls->length / 4) : 0;
-
-	if (num_funcs > 1 && num_funcs != num_pins) {
-		dev_err(pc->dev,
-			"%s: brcm,function must have 1 or %d entries\n",
-			of_node_full_name(np), num_pins);
-		return -EINVAL;
-	}
-
-	if (num_pulls > 1 && num_pulls != num_pins) {
-		dev_err(pc->dev,
-			"%s: brcm,pull must have 1 or %d entries\n",
-			of_node_full_name(np), num_pins);
-		return -EINVAL;
-	}
-
-	maps_per_pin = 0;
-	if (num_funcs)
-		maps_per_pin++;
-	if (num_pulls)
-		maps_per_pin++;
-	cur_map = maps = kzalloc(num_pins * maps_per_pin * sizeof(*maps),
-				GFP_KERNEL);
-	if (!maps)
-		return -ENOMEM;
-
-	for (i = 0; i < num_pins; i++) {
-		err = of_property_read_u32_index(np, "brcm,pins", i, &pin);
-		if (err)
-			goto out;
-		if (pin >= ARRAY_SIZE(bcm2835_gpio_pins)) {
-			dev_err(pc->dev, "%s: invalid brcm,pins value %d\n",
-				of_node_full_name(np), pin);
-			err = -EINVAL;
-			goto out;
-		}
-
-		if (num_funcs) {
-			err = of_property_read_u32_index(np, "brcm,function",
-					(num_funcs > 1) ? i : 0, &func);
-			if (err)
-				goto out;
-			err = bcm2835_pctl_dt_node_to_map_func(pc, np, pin,
-							func, &cur_map);
-			if (err)
-				goto out;
-		}
-		if (num_pulls) {
-			err = of_property_read_u32_index(np, "brcm,pull",
-					(num_funcs > 1) ? i : 0, &pull);
-			if (err)
-				goto out;
-			err = bcm2835_pctl_dt_node_to_map_pull(pc, np, pin,
-							pull, &cur_map);
-			if (err)
-				goto out;
-		}
-	}
-
-	*map = maps;
-	*num_maps = num_pins * maps_per_pin;
-
-	return 0;
-
-out:
-	kfree(maps);
-	return err;
-}
-
-static const struct pinctrl_ops bcm2835_pctl_ops = {
-	.get_groups_count = bcm2835_pctl_get_groups_count,
-	.get_group_name = bcm2835_pctl_get_group_name,
-	.get_group_pins = bcm2835_pctl_get_group_pins,
-	.pin_dbg_show = bcm2835_pctl_pin_dbg_show,
-	.dt_node_to_map = bcm2835_pctl_dt_node_to_map,
-	.dt_free_map = bcm2835_pctl_dt_free_map,
-};
-
-static int bcm2835_pmx_get_functions_count(struct pinctrl_dev *pctldev)
-{
-	return BCM2835_FSEL_COUNT;
-}
-
-static const char *bcm2835_pmx_get_function_name(struct pinctrl_dev *pctldev,
-		unsigned selector)
-{
-	return bcm2835_functions[selector];
-}
-
-static int bcm2835_pmx_get_function_groups(struct pinctrl_dev *pctldev,
-		unsigned selector,
-		const char * const **groups,
-		unsigned * const num_groups)
-{
-	/* every pin can do every function */
-	*groups = bcm2835_gpio_groups;
-	*num_groups = ARRAY_SIZE(bcm2835_gpio_groups);
-
-	return 0;
-}
-
-static int bcm2835_pmx_set(struct pinctrl_dev *pctldev,
-		unsigned func_selector,
-		unsigned group_selector)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-
-	bcm2835_pinctrl_fsel_set(pc, group_selector, func_selector);
-
-	return 0;
-}
-
-static void bcm2835_pmx_gpio_disable_free(struct pinctrl_dev *pctldev,
-		struct pinctrl_gpio_range *range,
-		unsigned offset)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-
-	/* disable by setting to GPIO_IN */
-	bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN);
-}
-
-static int bcm2835_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
-		struct pinctrl_gpio_range *range,
-		unsigned offset,
-		bool input)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-	enum bcm2835_fsel fsel = input ?
-		BCM2835_FSEL_GPIO_IN : BCM2835_FSEL_GPIO_OUT;
-
-	bcm2835_pinctrl_fsel_set(pc, offset, fsel);
-
-	return 0;
-}
-
-static const struct pinmux_ops bcm2835_pmx_ops = {
-	.get_functions_count = bcm2835_pmx_get_functions_count,
-	.get_function_name = bcm2835_pmx_get_function_name,
-	.get_function_groups = bcm2835_pmx_get_function_groups,
-	.set_mux = bcm2835_pmx_set,
-	.gpio_disable_free = bcm2835_pmx_gpio_disable_free,
-	.gpio_set_direction = bcm2835_pmx_gpio_set_direction,
-};
-
-static int bcm2835_pinconf_get(struct pinctrl_dev *pctldev,
-			unsigned pin, unsigned long *config)
-{
-	/* No way to read back config in HW */
-	return -ENOTSUPP;
-}
-
-static int bcm2835_pinconf_set(struct pinctrl_dev *pctldev,
-			unsigned pin, unsigned long *configs,
-			unsigned num_configs)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-	enum bcm2835_pinconf_param param;
-	u16 arg;
-	u32 off, bit;
-	int i;
-
-	for (i = 0; i < num_configs; i++) {
-		param = BCM2835_PINCONF_UNPACK_PARAM(configs[i]);
-		arg = BCM2835_PINCONF_UNPACK_ARG(configs[i]);
-
-		if (param != BCM2835_PINCONF_PARAM_PULL)
-			return -EINVAL;
-
-		off = GPIO_REG_OFFSET(pin);
-		bit = GPIO_REG_SHIFT(pin);
-
-		bcm2835_gpio_wr(pc, GPPUD, arg & 3);
-		/*
-		 * Docs say to wait 150 cycles, but not of what. We assume a
-		 * 1 MHz clock here, which is pretty slow...
-		 */
-		udelay(150);
-		bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), BIT(bit));
-		udelay(150);
-		bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), 0);
-	} /* for each config */
-
-	return 0;
-}
-
-static const struct pinconf_ops bcm2835_pinconf_ops = {
-	.pin_config_get = bcm2835_pinconf_get,
-	.pin_config_set = bcm2835_pinconf_set,
-};
-
-static struct pinctrl_desc bcm2835_pinctrl_desc = {
-	.name = MODULE_NAME,
-	.pins = bcm2835_gpio_pins,
-	.npins = ARRAY_SIZE(bcm2835_gpio_pins),
-	.pctlops = &bcm2835_pctl_ops,
-	.pmxops = &bcm2835_pmx_ops,
-	.confops = &bcm2835_pinconf_ops,
-	.owner = THIS_MODULE,
-};
-
-static struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = {
-	.name = MODULE_NAME,
-	.npins = BCM2835_NUM_GPIOS,
-};
-
-static int bcm2835_pinctrl_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct bcm2835_pinctrl *pc;
-	struct resource iomem;
-	int err, i;
-	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_pins) != BCM2835_NUM_GPIOS);
-	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_groups) != BCM2835_NUM_GPIOS);
-
-	pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
-	if (!pc)
-		return -ENOMEM;
-
-	platform_set_drvdata(pdev, pc);
-	pc->dev = dev;
-
-	err = of_address_to_resource(np, 0, &iomem);
-	if (err) {
-		dev_err(dev, "could not get IO memory\n");
-		return err;
-	}
-
-	pc->base = devm_ioremap_resource(dev, &iomem);
-	if (IS_ERR(pc->base))
-		return PTR_ERR(pc->base);
-
-	pc->gpio_chip = bcm2835_gpio_chip;
-	pc->gpio_chip.dev = dev;
-	pc->gpio_chip.of_node = np;
-
-	pc->irq_domain = irq_domain_add_linear(np, BCM2835_NUM_GPIOS,
-			&irq_domain_simple_ops, NULL);
-	if (!pc->irq_domain) {
-		dev_err(dev, "could not create IRQ domain\n");
-		return -ENOMEM;
-	}
-
-	for (i = 0; i < BCM2835_NUM_GPIOS; i++) {
-		int irq = irq_create_mapping(pc->irq_domain, i);
-		irq_set_lockdep_class(irq, &gpio_lock_class);
-		irq_set_chip_and_handler(irq, &bcm2835_gpio_irq_chip,
-				handle_simple_irq);
-		irq_set_chip_data(irq, pc);
-		set_irq_flags(irq, IRQF_VALID);
-	}
-
-	for (i = 0; i < BCM2835_NUM_BANKS; i++) {
-		unsigned long events;
-		unsigned offset;
-		int len;
-		char *name;
-
-		/* clear event detection flags */
-		bcm2835_gpio_wr(pc, GPREN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPFEN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPHEN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPLEN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPAREN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPAFEN0 + i * 4, 0);
-
-		/* clear all the events */
-		events = bcm2835_gpio_rd(pc, GPEDS0 + i * 4);
-		for_each_set_bit(offset, &events, 32)
-			bcm2835_gpio_wr(pc, GPEDS0 + i * 4, BIT(offset));
-
-		pc->irq[i] = irq_of_parse_and_map(np, i);
-		pc->irq_data[i].pc = pc;
-		pc->irq_data[i].bank = i;
-		spin_lock_init(&pc->irq_lock[i]);
-
-		len = strlen(dev_name(pc->dev)) + 16;
-		name = devm_kzalloc(pc->dev, len, GFP_KERNEL);
-		if (!name)
-			return -ENOMEM;
-		snprintf(name, len, "%s:bank%d", dev_name(pc->dev), i);
-
-		err = devm_request_irq(dev, pc->irq[i],
-			bcm2835_gpio_irq_handler, IRQF_SHARED,
-			name, &pc->irq_data[i]);
-		if (err) {
-			dev_err(dev, "unable to request IRQ %d\n", pc->irq[i]);
-			return err;
-		}
-	}
-
-	err = gpiochip_add(&pc->gpio_chip);
-	if (err) {
-		dev_err(dev, "could not add GPIO chip\n");
-		return err;
-	}
-
-	pc->pctl_dev = pinctrl_register(&bcm2835_pinctrl_desc, dev, pc);
-	if (!pc->pctl_dev) {
-		gpiochip_remove(&pc->gpio_chip);
-		return -EINVAL;
-	}
-
-	pc->gpio_range = bcm2835_pinctrl_gpio_range;
-	pc->gpio_range.base = pc->gpio_chip.base;
-	pc->gpio_range.gc = &pc->gpio_chip;
-	pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
-
-	return 0;
-}
-
-static int bcm2835_pinctrl_remove(struct platform_device *pdev)
-{
-	struct bcm2835_pinctrl *pc = platform_get_drvdata(pdev);
-
-	pinctrl_unregister(pc->pctl_dev);
-	gpiochip_remove(&pc->gpio_chip);
-
-	return 0;
-}
-
-static struct of_device_id bcm2835_pinctrl_match[] = {
-	{ .compatible = "brcm,bcm2835-gpio" },
-	{}
-};
-MODULE_DEVICE_TABLE(of, bcm2835_pinctrl_match);
-
-static struct platform_driver bcm2835_pinctrl_driver = {
-	.probe = bcm2835_pinctrl_probe,
-	.remove = bcm2835_pinctrl_remove,
-	.driver = {
-		.name = MODULE_NAME,
-		.of_match_table = bcm2835_pinctrl_match,
-	},
-};
-module_platform_driver(bcm2835_pinctrl_driver);
-
-MODULE_AUTHOR("Chris Boot, Simon Arlott, Stephen Warren");
-MODULE_DESCRIPTION("BCM2835 Pin control driver");
-MODULE_LICENSE("GPL");
-- 
1.7.9.5

[PATCH v3 2/4] pinctrl: Broadcom Cygnus pinctrl device tree binding

[Ray Jui]

Device tree binding documentation for Broadcom Cygnus IOMUX driver

Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Scott Branden <sbranden-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
---
 .../bindings/pinctrl/brcm,cygnus-pinmux.txt        |  159 ++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt
new file mode 100644
index 0000000..1082b8b
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt
@@ -0,0 +1,159 @@
+Broadcom Cygnus IOMUX Controller
+
+The Cygnus IOMUX controller supports group based mux configuration. In
+addition, certain pins can be muxed to GPIO function individually.
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-pinmux"
+
+- reg:
+    Define the base and range of the I/O address space that contains the Cygnus
+IOMUX registers
+
+Required properties in child nodes:
+
+- function:
+    The mux function to select
+
+- groups:
+    The list of groups to select with a given function
+
+Each child node represents a configuration. Client devices reference the child
+node to enable a mux configuration
+
+For more details, refer to
+Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
+
+For example:
+
+	pinmux: pinmux@0x0301d0c8 {
+		compatible = "brcm,cygnus-pinmux";
+		reg = <0x0301d0c8 0x1b0>;
+
+		i2s_0: i2s_0 {
+			function = "i2s0";
+			groups = "i2s0_0_grp", "i2s0_1_grp";
+		};
+
+		i2s_1: i2s_1 {
+			function = "i2s1";
+			groups = "i2s1_0_grp", "i2s1_1_grp";
+		};
+
+		i2s_2: i2s_2 {
+			function = "i2s2";
+			groups = "i2s2_0_grp", "i2s2_1_grp", "i2s2_2_grp",
+				 "i2s2_3_grp", "i2s2_4_grp";
+		};
+
+		spi_0: spi_0 {
+			function = "spi0";
+			groups = "spi0_grp";
+		};
+	}
+
+	spi0@18028000 {
+			compatible = "arm,pl022", "arm,primecell";
+			reg = <0x18028000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+			pinctrl-0 = <&spi_0>;
+			clocks = <&axi81_clk>;
+			clock-names = "apb_pclk";
+	};
+
+List of supported functions and groups in Cygnus:
+
+"gpio": N/A (to be removed for A0)
+
+"i2s0": "i2s0_0_grp", "i2s0_1_grp"
+
+"i2s1": "i2s1_0_grp", "i2s1_1_grp"
+
+"i2s2": "i2s2_0_grp", "i2s2_1_grp", "i2s2_2_grp", "i2s2_3_grp", "i2s2_4_grp"
+
+"spdif": "spdif_grp"
+
+"pwm0": "pwm0_grp"
+
+"pwm1": "pwm1_grp"
+
+"pwm2": "pwm2_grp"
+
+"pwm3": "pwm3_grp"
+
+"pwm4": "pwm4_grp"
+
+"pwm5": "pwm5_grp"
+
+"key": "key0_grp", "key1_grp", "key2_grp", "key3_grp", "key4_grp", "key5_grp",
+"key6_grp", "key7_grp", "key8_grp", "key9_grp", "key10_grp", "key11_grp",
+"key12_grp", "key13_grp", "key14_grp", "key15_grp"
+
+"audio_dte": "audio_dte0_grp", "audio_dte1_grp", "audio_dte2_grp", "audio_dte3_grp"
+
+"smart_card0": "smart_card0_grp", "smart_card0_fcb_grp"
+
+"smart_card1": "smart_card1_grp", "smart_card1_fcb_grp"
+
+"spi0": "spi0_grp"
+
+"spi1": "spi1_grp"
+
+"spi2": "spi2_grp"
+
+"spi3": "spi3_grp"
+
+"spi4": "spi4_0_grp", "spi4_1_grp"
+
+"spi5": "spi5_grp"
+
+"sw_led0": "sw_led0_0_grp", "sw_led0_1_grp"
+
+"sw_led1": "sw_led1_grp"
+
+"sw_led2": "sw_led2_0_grp", "sw_led2_1_grp"
+
+"d1w": "d1w_grp"
+
+"lcd": "lcd_grp"
+
+"sram": "sram_0_grp", "sram_1_grp"
+
+"uart0": "uart0_grp"
+
+"uart1": "uart1_grp", "uart1_dte_grp"
+
+"uart2": "uart2_grp"
+
+"uart3": "uart3_grp"
+
+"uart4": "uart4_grp"
+
+"qspi": "qspi_0_grp", "qspi_1_grp"
+
+"nand": "nand_grp"
+
+"sdio0": "sdio0_grp", "sdio0_cd_grp", "sdio0_mmc_grp"
+
+"sdio1": "sdio1_data_0_grp", "sdio1_data_1_grp", "sdio1_cd_grp",
+"sdio1_led_grp", "sdio1_mmc_grp"
+
+"can0": "can0_grp"
+
+"can1": "can1_grp"
+
+"cam": "cam_led_grp", "cam_0_grp", "cam_1_grp"
+
+"bsc1": "bsc1_grp"
+
+"pcie_clkreq": "pcie_clkreq_grp"
+
+"usb0_oc": "usb0_oc_grp"
+
+"usb1_oc": "usb1_oc_grp"
+
+"usb2_oc": "usb2_oc_grp"
-- 
1.7.9.5

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[PATCH v3 3/4] pinctrl: cygnus: add initial IOMUX driver support

[Ray Jui]

This adds the initial driver support for the Broadcom Cygnus IOMUX
controller. The Cygnus IOMUX controller supports group based mux
configuration but allows certain pins to be muxed to GPIO individually

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/pinctrl/bcm/Kconfig              |   13 +
 drivers/pinctrl/bcm/Makefile             |    5 +-
 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c | 1087 ++++++++++++++++++++++++++++++
 3 files changed, 1103 insertions(+), 2 deletions(-)
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c

diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
index bc6d048..eb13201 100644
--- a/drivers/pinctrl/bcm/Kconfig
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -19,3 +19,16 @@ config PINCTRL_BCM2835
 	bool
 	select PINMUX
 	select PINCONF
+
+config PINCTRL_CYGNUS_MUX
+	bool "Broadcom Cygnus IOMUX driver"
+	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
+	select PINMUX
+	select GENERIC_PINCONF
+	default ARCH_BCM_CYGNUS
+	help
+	  Say yes here to enable the Broadcom Cygnus IOMUX driver.
+
+	  The Broadcom Cygnus IOMUX driver supports group based IOMUX
+	  configuration, with the exception that certain individual pins
+	  can be overrided to GPIO function
diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
index 7ba80a3..bb6beb6 100644
--- a/drivers/pinctrl/bcm/Makefile
+++ b/drivers/pinctrl/bcm/Makefile
@@ -1,4 +1,5 @@
 # Broadcom pinctrl support
 
-obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
-obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
+obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
new file mode 100644
index 0000000..33565b4
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
@@ -0,0 +1,1087 @@
+/* Copyright (C) 2014-2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file contains the Cygnus IOMUX driver that supports group based PINMUX
+ * configuration. Although PINMUX configuration is mainly group based, the
+ * Cygnus IOMUX controller allows certain pins to be individually muxed to GPIO
+ * function, and therefore be controlled by the Cygnus ASIU GPIO controller
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include "../core.h"
+#include "../pinctrl-utils.h"
+
+#define CYGNUS_NUM_IOMUX_REGS     8
+#define CYGNUS_NUM_MUX_PER_REG    8
+#define CYGNUS_NUM_IOMUX          (CYGNUS_NUM_IOMUX_REGS * \
+				   CYGNUS_NUM_MUX_PER_REG)
+
+/*
+ * Cygnus IOMUX register description
+ *
+ * @offset: register offset for mux configuration of a group
+ * @shift: bit shift for mux configuration of a group
+ * @alt: alternate function to set to
+ */
+struct cygnus_mux {
+	unsigned int offset;
+	unsigned int shift;
+	unsigned int alt;
+};
+
+/*
+ * Keep track of Cygnus IOMUX configuration and prevent double configuration
+ *
+ * @cygnus_mux: Cygnus IOMUX register description
+ * @is_configured: flag to indicate whether a mux setting has already been
+ * configured
+ */
+struct cygnus_mux_log {
+	struct cygnus_mux mux;
+	bool is_configured;
+};
+
+/*
+ * Group based IOMUX configuration
+ *
+ * @name: name of the group
+ * @pins: array of pins used by this group
+ * @num_pins: total number of pins used by this group
+ * @mux: Cygnus group based IOMUX configuration
+ */
+struct cygnus_pin_group {
+	const char *name;
+	const unsigned *pins;
+	const unsigned num_pins;
+	const struct cygnus_mux mux;
+};
+
+/*
+ * Cygnus mux function and supported pin groups
+ *
+ * @name: name of the function
+ * @groups: array of groups that can be supported by this function
+ * @num_groups: total number of groups that can be supported by this function
+ */
+struct cygnus_pin_function {
+	const char *name;
+	const char * const *groups;
+	const unsigned num_groups;
+};
+
+/*
+ * Cygnus IOMUX pinctrl core
+ *
+ * @pctl: pointer to pinctrl_dev
+ * @dev: pointer to device
+ * @base0: first I/O register base of the Cygnus IOMUX controller
+ * @base1: second I/O register base
+ * @groups: pointer to array of groups
+ * @num_groups: total number of groups
+ * @functions: pointer to array of functions
+ * @num_functions: total number of functions
+ * @mux_log: pointer to the array of mux logs
+ * @lock: lock to protect register access
+ */
+struct cygnus_pinctrl {
+	struct pinctrl_dev *pctl;
+	struct device *dev;
+	void __iomem *base0;
+	void __iomem *base1;
+
+	const struct cygnus_pin_group *groups;
+	unsigned num_groups;
+
+	const struct cygnus_pin_function *functions;
+	unsigned num_functions;
+
+	struct cygnus_mux_log *mux_log;
+
+	spinlock_t lock;
+};
+
+/*
+ * Certain pins can be individually muxed to GPIO function
+ *
+ * @is_supported: flag to indicate GPIO mux is supported for this pin
+ * @offset: register offset for GPIO mux override of a pin
+ * @shift: bit shift for GPIO mux override of a pin
+ */
+struct cygnus_gpio_mux {
+	int is_supported;
+	unsigned int offset;
+	unsigned int shift;
+};
+
+/*
+ * Description of a pin in Cygnus
+ *
+ * @pin: pin number
+ * @name: pin name
+ * @gpio_mux: GPIO override related information
+ */
+struct cygnus_pin {
+	unsigned pin;
+	char *name;
+	struct cygnus_gpio_mux gpio_mux;
+};
+
+#define CYGNUS_PIN_DESC(p, n, i, o, s)	\
+{					\
+	.pin = p,			\
+	.name = n,			\
+	.gpio_mux = {			\
+		.is_supported = i,	\
+		.offset = o,		\
+		.shift = s,		\
+	},				\
+}
+
+/*
+ * List of pins in Cygnus
+ */
+static struct cygnus_pin cygnus_pins[] = {
+	CYGNUS_PIN_DESC(0, "ext_device_reset_n", 0, 0, 0),
+	CYGNUS_PIN_DESC(1, "chip_mode0", 0, 0, 0),
+	CYGNUS_PIN_DESC(2, "chip_mode1", 0, 0, 0),
+	CYGNUS_PIN_DESC(3, "chip_mode2", 0, 0, 0),
+	CYGNUS_PIN_DESC(4, "chip_mode3", 0, 0, 0),
+	CYGNUS_PIN_DESC(5, "chip_mode4", 0, 0, 0),
+	CYGNUS_PIN_DESC(6, "bsc0_scl", 0, 0, 0),
+	CYGNUS_PIN_DESC(7, "bsc0_sda", 0, 0, 0),
+	CYGNUS_PIN_DESC(8, "bsc1_scl", 0, 0, 0),
+	CYGNUS_PIN_DESC(9, "bsc1_sda", 0, 0, 0),
+	CYGNUS_PIN_DESC(10, "d1w_dq", 1, 0x28, 0),
+	CYGNUS_PIN_DESC(11, "d1wowstz_l", 1, 0x4, 28),
+	CYGNUS_PIN_DESC(12, "gpio0", 0, 0, 0),
+	CYGNUS_PIN_DESC(13, "gpio1", 0, 0, 0),
+	CYGNUS_PIN_DESC(14, "gpio2", 0, 0, 0),
+	CYGNUS_PIN_DESC(15, "gpio3", 0, 0, 0),
+	CYGNUS_PIN_DESC(16, "gpio4", 0, 0, 0),
+	CYGNUS_PIN_DESC(17, "gpio5", 0, 0, 0),
+	CYGNUS_PIN_DESC(18, "gpio6", 0, 0, 0),
+	CYGNUS_PIN_DESC(19, "gpio7", 0, 0, 0),
+	CYGNUS_PIN_DESC(20, "gpio8", 0, 0, 0),
+	CYGNUS_PIN_DESC(21, "gpio9", 0, 0, 0),
+	CYGNUS_PIN_DESC(22, "gpio10", 0, 0, 0),
+	CYGNUS_PIN_DESC(23, "gpio11", 0, 0, 0),
+	CYGNUS_PIN_DESC(24, "gpio12", 0, 0, 0),
+	CYGNUS_PIN_DESC(25, "gpio13", 0, 0, 0),
+	CYGNUS_PIN_DESC(26, "gpio14", 0, 0, 0),
+	CYGNUS_PIN_DESC(27, "gpio15", 0, 0, 0),
+	CYGNUS_PIN_DESC(28, "gpio16", 0, 0, 0),
+	CYGNUS_PIN_DESC(29, "gpio17", 0, 0, 0),
+	CYGNUS_PIN_DESC(30, "gpio18", 0, 0, 0),
+	CYGNUS_PIN_DESC(31, "gpio19", 0, 0, 0),
+	CYGNUS_PIN_DESC(32, "gpio20", 0, 0, 0),
+	CYGNUS_PIN_DESC(33, "gpio21", 0, 0, 0),
+	CYGNUS_PIN_DESC(34, "gpio22", 0, 0, 0),
+	CYGNUS_PIN_DESC(35, "gpio23", 0, 0, 0),
+	CYGNUS_PIN_DESC(36, "mdc", 0, 0, 0),
+	CYGNUS_PIN_DESC(37, "mdio", 0, 0, 0),
+	CYGNUS_PIN_DESC(38, "pwm0", 1, 0x10, 30),
+	CYGNUS_PIN_DESC(39, "pwm1", 1, 0x10, 28),
+	CYGNUS_PIN_DESC(40, "pwm2", 1, 0x10, 26),
+	CYGNUS_PIN_DESC(41, "pwm3", 1, 0x10, 24),
+	CYGNUS_PIN_DESC(42, "sc0_clk", 1, 0x10, 22),
+	CYGNUS_PIN_DESC(43, "sc0_cmdvcc_l", 1, 0x10, 20),
+	CYGNUS_PIN_DESC(44, "sc0_detect", 1, 0x10, 18),
+	CYGNUS_PIN_DESC(45, "sc0_fcb", 1, 0x10, 16),
+	CYGNUS_PIN_DESC(46, "sc0_io", 1, 0x10, 14),
+	CYGNUS_PIN_DESC(47, "sc0_rst_l", 1, 0x10, 12),
+	CYGNUS_PIN_DESC(48, "sc1_clk", 1, 0x10, 10),
+	CYGNUS_PIN_DESC(49, "sc1_cmdvcc_l", 1, 0x10, 8),
+	CYGNUS_PIN_DESC(50, "sc1_detect", 1, 0x10, 6),
+	CYGNUS_PIN_DESC(51, "sc1_fcb", 1, 0x10, 4),
+	CYGNUS_PIN_DESC(52, "sc1_io", 1, 0x10, 2),
+	CYGNUS_PIN_DESC(53, "sc1_rst_l", 1, 0x10, 0),
+	CYGNUS_PIN_DESC(54, "spi0_clk", 1, 0x18, 10),
+	CYGNUS_PIN_DESC(55, "spi0_mosi", 1, 0x18, 6),
+	CYGNUS_PIN_DESC(56, "spi0_miso", 1, 0x18, 8),
+	CYGNUS_PIN_DESC(57, "spi0_ss", 1, 0x18, 4),
+	CYGNUS_PIN_DESC(58, "spi1_clk", 1, 0x18, 2),
+	CYGNUS_PIN_DESC(59, "spi1_mosi", 1, 0x1c, 30),
+	CYGNUS_PIN_DESC(60, "spi1_miso", 1, 0x18, 0),
+	CYGNUS_PIN_DESC(61, "spi1_ss", 1, 0x1c, 28),
+	CYGNUS_PIN_DESC(62, "spi2_clk", 1, 0x1c, 26),
+	CYGNUS_PIN_DESC(63, "spi2_mosi", 1, 0x1c, 22),
+	CYGNUS_PIN_DESC(64, "spi2_miso", 1, 0x1c, 24),
+	CYGNUS_PIN_DESC(65, "spi2_ss", 1, 0x1c, 20),
+	CYGNUS_PIN_DESC(66, "spi3_clk", 1, 0x1c, 18),
+	CYGNUS_PIN_DESC(67, "spi3_mosi", 1, 0x1c, 14),
+	CYGNUS_PIN_DESC(68, "spi3_miso", 1, 0x1c, 16),
+	CYGNUS_PIN_DESC(69, "spi3_ss", 1, 0x1c, 12),
+	CYGNUS_PIN_DESC(70, "uart0_cts", 1, 0x1c, 10),
+	CYGNUS_PIN_DESC(71, "uart0_rts", 1, 0x1c, 8),
+	CYGNUS_PIN_DESC(72, "uart0_rx", 1, 0x1c, 6),
+	CYGNUS_PIN_DESC(73, "uart0_tx", 1, 0x1c, 4),
+	CYGNUS_PIN_DESC(74, "uart1_cts", 1, 0x1c, 2),
+	CYGNUS_PIN_DESC(75, "uart1_dcd", 1, 0x1c, 0),
+	CYGNUS_PIN_DESC(76, "uart1_dsr", 1, 0x20, 14),
+	CYGNUS_PIN_DESC(77, "uart1_dtr", 1, 0x20, 12),
+	CYGNUS_PIN_DESC(78, "uart1_ri", 1, 0x20, 10),
+	CYGNUS_PIN_DESC(79, "uart1_rts", 1, 0x20, 8),
+	CYGNUS_PIN_DESC(80, "uart1_rx", 1, 0x20, 6),
+	CYGNUS_PIN_DESC(81, "uart1_tx", 1, 0x20, 4),
+	CYGNUS_PIN_DESC(82, "uart3_rx", 1, 0x20, 2),
+	CYGNUS_PIN_DESC(83, "uart3_tx", 1, 0x20, 0),
+	CYGNUS_PIN_DESC(84, "sdio1_clk_sdcard", 1, 0x14, 6),
+	CYGNUS_PIN_DESC(85, "sdio1_cmd", 1, 0x14, 4),
+	CYGNUS_PIN_DESC(86, "sdio1_data0", 1, 0x14, 2),
+	CYGNUS_PIN_DESC(87, "sdio1_data1", 1, 0x14, 0),
+	CYGNUS_PIN_DESC(88, "sdio1_data2", 1, 0x18, 30),
+	CYGNUS_PIN_DESC(89, "sdio1_data3", 1, 0x18, 28),
+	CYGNUS_PIN_DESC(90, "sdio1_wp_n", 1, 0x18, 24),
+	CYGNUS_PIN_DESC(91, "sdio1_card_rst", 1, 0x14, 10),
+	CYGNUS_PIN_DESC(92, "sdio1_led_on", 1, 0x18, 26),
+	CYGNUS_PIN_DESC(93, "sdio1_cd", 1, 0x14, 8),
+	CYGNUS_PIN_DESC(94, "sdio0_clk_sdcard", 1, 0x14, 26),
+	CYGNUS_PIN_DESC(95, "sdio0_cmd", 1, 0x14, 24),
+	CYGNUS_PIN_DESC(96, "sdio0_data0", 1, 0x14, 22),
+	CYGNUS_PIN_DESC(97, "sdio0_data1", 1, 0x14, 20),
+	CYGNUS_PIN_DESC(98, "sdio0_data2", 1, 0x14, 18),
+	CYGNUS_PIN_DESC(99, "sdio0_data3", 1, 0x14, 16),
+	CYGNUS_PIN_DESC(100, "sdio0_wp_n", 1, 0x14, 12),
+	CYGNUS_PIN_DESC(101, "sdio0_card_rst", 1, 0x14, 30),
+	CYGNUS_PIN_DESC(102, "sdio0_led_on", 1, 0x14, 14),
+	CYGNUS_PIN_DESC(103, "sdio0_cd", 1, 0x14, 28),
+	CYGNUS_PIN_DESC(104, "sflash_clk", 1, 0x18, 22),
+	CYGNUS_PIN_DESC(105, "sflash_cs_l", 1, 0x18, 20),
+	CYGNUS_PIN_DESC(106, "sflash_mosi", 1, 0x18, 14),
+	CYGNUS_PIN_DESC(107, "sflash_miso", 1, 0x18, 16),
+	CYGNUS_PIN_DESC(108, "sflash_wp_n", 1, 0x18, 12),
+	CYGNUS_PIN_DESC(109, "sflash_hold_n", 1, 0x18, 18),
+	CYGNUS_PIN_DESC(110, "nand_ale", 1, 0xc, 30),
+	CYGNUS_PIN_DESC(111, "nand_ce0_l", 1, 0xc, 28),
+	CYGNUS_PIN_DESC(112, "nand_ce1_l", 1, 0xc, 26),
+	CYGNUS_PIN_DESC(113, "nand_cle", 1, 0xc, 24),
+	CYGNUS_PIN_DESC(114, "nand_dq0", 1, 0xc, 22),
+	CYGNUS_PIN_DESC(115, "nand_dq1", 1, 0xc, 20),
+	CYGNUS_PIN_DESC(116, "nand_dq2", 1, 0xc, 18),
+	CYGNUS_PIN_DESC(117, "nand_dq3", 1, 0xc, 16),
+	CYGNUS_PIN_DESC(118, "nand_dq4", 1, 0xc, 14),
+	CYGNUS_PIN_DESC(119, "nand_dq5", 1, 0xc, 12),
+	CYGNUS_PIN_DESC(120, "nand_dq6", 1, 0xc, 10),
+	CYGNUS_PIN_DESC(121, "nand_dq7", 1, 0xc, 8),
+	CYGNUS_PIN_DESC(122, "nand_rb_l", 1, 0xc, 6),
+	CYGNUS_PIN_DESC(123, "nand_re_l", 1, 0xc, 4),
+	CYGNUS_PIN_DESC(124, "nand_we_l", 1, 0xc, 2),
+	CYGNUS_PIN_DESC(125, "nand_wp_l", 1, 0xc, 0),
+	CYGNUS_PIN_DESC(126, "lcd_clac", 1, 0x4, 26),
+	CYGNUS_PIN_DESC(127, "lcd_clcp", 1, 0x4, 24),
+	CYGNUS_PIN_DESC(128, "lcd_cld0", 1, 0x4, 22),
+	CYGNUS_PIN_DESC(129, "lcd_cld1", 1, 0x4, 0),
+	CYGNUS_PIN_DESC(130, "lcd_cld10", 1, 0x4, 20),
+	CYGNUS_PIN_DESC(131, "lcd_cld11", 1, 0x4, 18),
+	CYGNUS_PIN_DESC(132, "lcd_cld12", 1, 0x4, 16),
+	CYGNUS_PIN_DESC(133, "lcd_cld13", 1, 0x4, 14),
+	CYGNUS_PIN_DESC(134, "lcd_cld14", 1, 0x4, 12),
+	CYGNUS_PIN_DESC(135, "lcd_cld15", 1, 0x4, 10),
+	CYGNUS_PIN_DESC(136, "lcd_cld16", 1, 0x4, 8),
+	CYGNUS_PIN_DESC(137, "lcd_cld17", 1, 0x4, 6),
+	CYGNUS_PIN_DESC(138, "lcd_cld18", 1, 0x4, 4),
+	CYGNUS_PIN_DESC(139, "lcd_cld19", 1, 0x4, 2),
+	CYGNUS_PIN_DESC(140, "lcd_cld2", 1, 0x8, 22),
+	CYGNUS_PIN_DESC(141, "lcd_cld20", 1, 0x8, 30),
+	CYGNUS_PIN_DESC(142, "lcd_cld21", 1, 0x8, 28),
+	CYGNUS_PIN_DESC(143, "lcd_cld22", 1, 0x8, 26),
+	CYGNUS_PIN_DESC(144, "lcd_cld23", 1, 0x8, 24),
+	CYGNUS_PIN_DESC(145, "lcd_cld3", 1, 0x8, 20),
+	CYGNUS_PIN_DESC(146, "lcd_cld4", 1, 0x8, 18),
+	CYGNUS_PIN_DESC(147, "lcd_cld5", 1, 0x8, 16),
+	CYGNUS_PIN_DESC(148, "lcd_cld6", 1, 0x8, 14),
+	CYGNUS_PIN_DESC(149, "lcd_cld7", 1, 0x8, 12),
+	CYGNUS_PIN_DESC(150, "lcd_cld8", 1, 0x8, 10),
+	CYGNUS_PIN_DESC(151, "lcd_cld9", 1, 0x8, 8),
+	CYGNUS_PIN_DESC(152, "lcd_clfp", 1, 0x8, 6),
+	CYGNUS_PIN_DESC(153, "lcd_clle", 1, 0x8, 4),
+	CYGNUS_PIN_DESC(154, "lcd_cllp", 1, 0x8, 2),
+	CYGNUS_PIN_DESC(155, "lcd_clpower", 1, 0x8, 0),
+	CYGNUS_PIN_DESC(156, "camera_vsync", 1, 0x4, 30),
+	CYGNUS_PIN_DESC(157, "camera_trigger", 1, 0x0, 0),
+	CYGNUS_PIN_DESC(158, "camera_strobe", 1, 0x0, 2),
+	CYGNUS_PIN_DESC(159, "camera_standby", 1, 0x0, 4),
+	CYGNUS_PIN_DESC(160, "camera_reset_n", 1, 0x0, 6),
+	CYGNUS_PIN_DESC(161, "camera_pixdata9", 1, 0x0, 8),
+	CYGNUS_PIN_DESC(162, "camera_pixdata8", 1, 0x0, 10),
+	CYGNUS_PIN_DESC(163, "camera_pixdata7", 1, 0x0, 12),
+	CYGNUS_PIN_DESC(164, "camera_pixdata6", 1, 0x0, 14),
+	CYGNUS_PIN_DESC(165, "camera_pixdata5", 1, 0x0, 16),
+	CYGNUS_PIN_DESC(166, "camera_pixdata4", 1, 0x0, 18),
+	CYGNUS_PIN_DESC(167, "camera_pixdata3", 1, 0x0, 20),
+	CYGNUS_PIN_DESC(168, "camera_pixdata2", 1, 0x0, 22),
+	CYGNUS_PIN_DESC(169, "camera_pixdata1", 1, 0x0, 24),
+	CYGNUS_PIN_DESC(170, "camera_pixdata0", 1, 0x0, 26),
+	CYGNUS_PIN_DESC(171, "camera_pixclk", 1, 0x0, 28),
+	CYGNUS_PIN_DESC(172, "camera_hsync", 1, 0x0, 30),
+	CYGNUS_PIN_DESC(173, "camera_pll_ref_clk", 0, 0, 0),
+	CYGNUS_PIN_DESC(174, "usb_id_indication", 0, 0, 0),
+	CYGNUS_PIN_DESC(175, "usb_vbus_indication", 0, 0, 0),
+	CYGNUS_PIN_DESC(176, "gpio0_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(177, "gpio1_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(178, "gpio2_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(179, "gpio3_3p3", 0, 0, 0),
+};
+
+/*
+ * List of groups of pins
+ */
+static const unsigned bsc1_pins[] = { 8, 9 };
+static const unsigned pcie_clkreq_pins[] = { 8, 9 };
+
+static const unsigned i2s2_0_pins[] = { 12 };
+static const unsigned i2s2_1_pins[] = { 13 };
+static const unsigned i2s2_2_pins[] = { 14 };
+static const unsigned i2s2_3_pins[] = { 15 };
+static const unsigned i2s2_4_pins[] = { 16 };
+
+static const unsigned pwm4_pins[] = { 17 };
+static const unsigned pwm5_pins[] = { 18 };
+
+static const unsigned key0_pins[] = { 20 };
+static const unsigned key1_pins[] = { 21 };
+static const unsigned key2_pins[] = { 22 };
+static const unsigned key3_pins[] = { 23 };
+static const unsigned key4_pins[] = { 24 };
+static const unsigned key5_pins[] = { 25 };
+
+static const unsigned key6_pins[] = { 26 };
+static const unsigned audio_dte0_pins[] = { 26 };
+
+static const unsigned key7_pins[] = { 27 };
+static const unsigned audio_dte1_pins[] = { 27 };
+
+static const unsigned key8_pins[] = { 28 };
+static const unsigned key9_pins[] = { 29 };
+static const unsigned key10_pins[] = { 30 };
+static const unsigned key11_pins[] = { 31 };
+static const unsigned key12_pins[] = { 32 };
+static const unsigned key13_pins[] = { 33 };
+
+static const unsigned key14_pins[] = { 34 };
+static const unsigned audio_dte2_pins[] = { 34 };
+
+static const unsigned key15_pins[] = { 35 };
+static const unsigned audio_dte3_pins[] = { 35 };
+
+static const unsigned pwm0_pins[] = { 38 };
+static const unsigned pwm1_pins[] = { 39 };
+static const unsigned pwm2_pins[] = { 40 };
+static const unsigned pwm3_pins[] = { 41 };
+
+static const unsigned sdio0_pins[] = { 94, 95, 96, 97, 98, 99 };
+
+static const unsigned smart_card0_pins[] = { 42, 43, 44, 46, 47 };
+static const unsigned i2s0_0_pins[] = { 42, 43, 44, 46 };
+static const unsigned spdif_pins[] = { 47 };
+
+static const unsigned smart_card1_pins[] = { 48, 49, 50, 52, 53 };
+static const unsigned i2s1_0_pins[] = { 48, 49, 50, 52 };
+
+static const unsigned spi0_pins[] = { 54, 55, 56, 57 };
+
+static const unsigned spi1_pins[] = { 58, 59, 60, 61 };
+
+static const unsigned spi2_pins[] = { 62, 63, 64, 65 };
+
+static const unsigned spi3_pins[] = { 66, 67, 68, 69 };
+static const unsigned sw_led0_0_pins[] = { 66, 67, 68, 69 };
+
+static const unsigned d1w_pins[] = { 10, 11 };
+static const unsigned uart4_pins[] = { 10, 11 };
+static const unsigned sw_led2_0_pins[] = { 10, 11 };
+
+static const unsigned lcd_pins[] = { 126, 127, 128, 129, 130, 131, 132, 133,
+	134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
+	148, 149, 150, 151, 152, 153, 154, 155 };
+static const unsigned sram_0_pins[] = { 126, 127, 128, 129, 130, 131, 132, 133,
+	134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
+	148, 149, 150, 151, 152, 153, 154, 155 };
+static const unsigned spi5_pins[] = { 141, 142, 143, 144 };
+
+static const unsigned uart0_pins[] = { 70, 71, 72, 73 };
+static const unsigned sw_led0_1_pins[] = { 70, 71, 72, 73 };
+
+static const unsigned uart1_dte_pins[] = { 75, 76, 77, 78 };
+static const unsigned uart2_pins[] = { 75, 76, 77, 78 };
+
+static const unsigned uart1_pins[] = { 74, 79, 80, 81 };
+
+static const unsigned uart3_pins[] = { 82, 83 };
+
+static const unsigned qspi_0_pins[] = { 104, 105, 106, 107 };
+
+static const unsigned nand_pins[] = { 110, 111, 112, 113, 114, 115, 116, 117,
+	118, 119, 120, 121, 122, 123, 124, 125 };
+
+static const unsigned sdio0_cd_pins[] = { 103 };
+
+static const unsigned sdio0_mmc_pins[] = { 100, 101, 102 };
+
+static const unsigned sdio1_data_0_pins[] = { 86, 87 };
+static const unsigned can0_pins[] = { 86, 87 };
+static const unsigned spi4_0_pins[] = { 86, 87 };
+
+static const unsigned sdio1_data_1_pins[] = { 88, 89 };
+static const unsigned can1_pins[] = { 88, 89 };
+static const unsigned spi4_1_pins[] = { 88, 89 };
+
+static const unsigned sdio1_cd_pins[] = { 93 };
+
+static const unsigned sdio1_led_pins[] = { 84, 85 };
+static const unsigned sw_led2_1_pins[] = { 84, 85 };
+
+static const unsigned sdio1_mmc_pins[] = { 90, 91, 92 };
+
+static const unsigned cam_led_pins[] = { 156, 157, 158, 159, 160 };
+static const unsigned sw_led1_pins[] = { 156, 157, 158, 159 };
+
+static const unsigned cam_0_pins[] = { 169, 170, 171, 169, 170 };
+
+static const unsigned cam_1_pins[] = { 161, 162, 163, 164, 165, 166, 167,
+	168 };
+static const unsigned sram_1_pins[] = { 161, 162, 163, 164, 165, 166, 167,
+	168 };
+
+static const unsigned qspi_1_pins[] = { 108, 109 };
+
+static const unsigned smart_card0_fcb_pins[] = { 45 };
+static const unsigned i2s0_1_pins[] = { 45 };
+
+static const unsigned smart_card1_fcb_pins[] = { 51 };
+static const unsigned i2s1_1_pins[] = { 51 };
+
+static const unsigned gpio0_3p3_pins[] = { 176 };
+static const unsigned usb0_oc_pins[] = { 176 };
+
+static const unsigned gpio1_3p3_pins[] = { 177 };
+static const unsigned usb1_oc_pins[] = { 177 };
+
+static const unsigned gpio2_3p3_pins[] = { 178 };
+static const unsigned usb2_oc_pins[] = { 178 };
+
+#define CYGNUS_PIN_GROUP(group_name, off, sh, al)	\
+{							\
+	.name = #group_name"""_grp",			\
+	.pins = group_name ## _pins,			\
+	.num_pins = ARRAY_SIZE(group_name ## _pins),	\
+	.mux = {					\
+		.offset = off,				\
+		.shift = sh,				\
+		.alt = al,				\
+	}						\
+}
+
+/*
+ * List of Cygnus pin groups
+ */
+static const struct cygnus_pin_group cygnus_pin_groups[] = {
+	CYGNUS_PIN_GROUP(i2s2_0, 0x0, 0, 2),
+	CYGNUS_PIN_GROUP(i2s2_1, 0x0, 4, 2),
+	CYGNUS_PIN_GROUP(i2s2_2, 0x0, 8, 2),
+	CYGNUS_PIN_GROUP(i2s2_3, 0x0, 12, 2),
+	CYGNUS_PIN_GROUP(i2s2_4, 0x0, 16, 2),
+	CYGNUS_PIN_GROUP(pwm4, 0x0, 20, 0),
+	CYGNUS_PIN_GROUP(pwm5, 0x0, 24, 2),
+	CYGNUS_PIN_GROUP(key0, 0x4, 0, 1),
+	CYGNUS_PIN_GROUP(key1, 0x4, 4, 1),
+	CYGNUS_PIN_GROUP(key2, 0x4, 8, 1),
+	CYGNUS_PIN_GROUP(key3, 0x4, 12, 1),
+	CYGNUS_PIN_GROUP(key4, 0x4, 16, 1),
+	CYGNUS_PIN_GROUP(key5, 0x4, 20, 1),
+	CYGNUS_PIN_GROUP(key6, 0x4, 24, 1),
+	CYGNUS_PIN_GROUP(audio_dte0, 0x4, 24, 2),
+	CYGNUS_PIN_GROUP(key7, 0x4, 28, 1),
+	CYGNUS_PIN_GROUP(audio_dte1, 0x4, 28, 2),
+	CYGNUS_PIN_GROUP(key8, 0x8, 0, 1),
+	CYGNUS_PIN_GROUP(key9, 0x8, 4, 1),
+	CYGNUS_PIN_GROUP(key10, 0x8, 8, 1),
+	CYGNUS_PIN_GROUP(key11, 0x8, 12, 1),
+	CYGNUS_PIN_GROUP(key12, 0x8, 16, 1),
+	CYGNUS_PIN_GROUP(key13, 0x8, 20, 1),
+	CYGNUS_PIN_GROUP(key14, 0x8, 24, 1),
+	CYGNUS_PIN_GROUP(audio_dte2, 0x8, 24, 2),
+	CYGNUS_PIN_GROUP(key15, 0x8, 28, 1),
+	CYGNUS_PIN_GROUP(audio_dte3, 0x8, 28, 2),
+	CYGNUS_PIN_GROUP(pwm0, 0xc, 0, 0),
+	CYGNUS_PIN_GROUP(pwm1, 0xc, 4, 0),
+	CYGNUS_PIN_GROUP(pwm2, 0xc, 8, 0),
+	CYGNUS_PIN_GROUP(pwm3, 0xc, 12, 0),
+	CYGNUS_PIN_GROUP(sdio0, 0xc, 16, 0),
+	CYGNUS_PIN_GROUP(smart_card0, 0xc, 20, 0),
+	CYGNUS_PIN_GROUP(i2s0_0, 0xc, 20, 1),
+	CYGNUS_PIN_GROUP(spdif, 0xc, 20, 1),
+	CYGNUS_PIN_GROUP(smart_card1, 0xc, 24, 0),
+	CYGNUS_PIN_GROUP(i2s1_0, 0xc, 24, 1),
+	CYGNUS_PIN_GROUP(spi0, 0x10, 0, 0),
+	CYGNUS_PIN_GROUP(spi1, 0x10, 4, 0),
+	CYGNUS_PIN_GROUP(spi2, 0x10, 8, 0),
+	CYGNUS_PIN_GROUP(spi3, 0x10, 12, 0),
+	CYGNUS_PIN_GROUP(sw_led0_0, 0x10, 12, 2),
+	CYGNUS_PIN_GROUP(d1w, 0x10, 16, 0),
+	CYGNUS_PIN_GROUP(uart4, 0x10, 16, 1),
+	CYGNUS_PIN_GROUP(sw_led2_0, 0x10, 16, 2),
+	CYGNUS_PIN_GROUP(lcd, 0x10, 20, 0),
+	CYGNUS_PIN_GROUP(sram_0, 0x10, 20, 1),
+	CYGNUS_PIN_GROUP(spi5, 0x10, 20, 2),
+	CYGNUS_PIN_GROUP(uart0, 0x14, 0, 0),
+	CYGNUS_PIN_GROUP(sw_led0_1, 0x14, 0, 2),
+	CYGNUS_PIN_GROUP(uart1_dte, 0x14, 4, 0),
+	CYGNUS_PIN_GROUP(uart2, 0x14, 4, 1),
+	CYGNUS_PIN_GROUP(uart1, 0x14, 8, 0),
+	CYGNUS_PIN_GROUP(uart3, 0x14, 12, 0),
+	CYGNUS_PIN_GROUP(qspi_0, 0x14, 16, 0),
+	CYGNUS_PIN_GROUP(nand, 0x14, 20, 0),
+	CYGNUS_PIN_GROUP(sdio0_cd, 0x18, 0, 0),
+	CYGNUS_PIN_GROUP(sdio0_mmc, 0x18, 4, 0),
+	CYGNUS_PIN_GROUP(sdio1_data_0, 0x18, 8, 0),
+	CYGNUS_PIN_GROUP(can0, 0x18, 8, 1),
+	CYGNUS_PIN_GROUP(spi4_0, 0x18, 8, 2),
+	CYGNUS_PIN_GROUP(sdio1_data_1, 0x18, 12, 0),
+	CYGNUS_PIN_GROUP(can1, 0x18, 12, 1),
+	CYGNUS_PIN_GROUP(spi4_1, 0x18, 12, 2),
+	CYGNUS_PIN_GROUP(sdio1_cd, 0x18, 16, 0),
+	CYGNUS_PIN_GROUP(sdio1_led, 0x18, 20, 0),
+	CYGNUS_PIN_GROUP(sw_led2_1, 0x18, 20, 2),
+	CYGNUS_PIN_GROUP(sdio1_mmc, 0x18, 24, 0),
+	CYGNUS_PIN_GROUP(cam_led, 0x1c, 0, 0),
+	CYGNUS_PIN_GROUP(sw_led1, 0x1c, 0, 1),
+	CYGNUS_PIN_GROUP(cam_0, 0x1c, 4, 0),
+	CYGNUS_PIN_GROUP(cam_1, 0x1c, 8, 0),
+	CYGNUS_PIN_GROUP(sram_1, 0x1c, 8, 1),
+	CYGNUS_PIN_GROUP(qspi_1, 0x1c, 12, 0),
+	CYGNUS_PIN_GROUP(bsc1, 0x1c, 16, 0),
+	CYGNUS_PIN_GROUP(pcie_clkreq, 0x1c, 16, 1),
+	CYGNUS_PIN_GROUP(smart_card0_fcb, 0x20, 0, 0),
+	CYGNUS_PIN_GROUP(i2s0_1, 0x20, 0, 1),
+	CYGNUS_PIN_GROUP(smart_card1_fcb, 0x20, 4, 0),
+	CYGNUS_PIN_GROUP(i2s1_1, 0x20, 4, 1),
+	CYGNUS_PIN_GROUP(gpio0_3p3, 0x28, 0, 0),
+	CYGNUS_PIN_GROUP(usb0_oc, 0x28, 0, 1),
+	CYGNUS_PIN_GROUP(gpio1_3p3, 0x28, 4, 0),
+	CYGNUS_PIN_GROUP(usb1_oc, 0x28, 4, 1),
+	CYGNUS_PIN_GROUP(gpio2_3p3, 0x28, 8, 0),
+	CYGNUS_PIN_GROUP(usb2_oc, 0x28, 8, 1),
+};
+
+/*
+ * List of groups supported by functions
+ */
+static const char * const i2s0_grps[] = { "i2s0_0_grp", "i2s0_1_grp" };
+static const char * const i2s1_grps[] = { "i2s1_0_grp", "i2s1_1_grp" };
+static const char * const i2s2_grps[] = { "i2s2_0_grp", "i2s2_1_grp",
+	"i2s2_2_grp", "i2s2_3_grp", "i2s2_4_grp" };
+static const char * const spdif_grps[] = { "spdif_grp" };
+static const char * const pwm0_grps[] = { "pwm0_grp" };
+static const char * const pwm1_grps[] = { "pwm1_grp" };
+static const char * const pwm2_grps[] = { "pwm2_grp" };
+static const char * const pwm3_grps[] = { "pwm3_grp" };
+static const char * const pwm4_grps[] = { "pwm4_grp" };
+static const char * const pwm5_grps[] = { "pwm5_grp" };
+static const char * const key_grps[] = { "key0_grp", "key1_grp", "key2_grp",
+	"key3_grp", "key4_grp", "key5_grp", "key6_grp", "key7_grp", "key8_grp",
+	"key9_grp", "key10_grp", "key11_grp", "key12_grp", "key13_grp",
+	"key14_grp", "key15_grp" };
+static const char * const audio_dte_grps[] = { "audio_dte0_grp",
+	"audio_dte1_grp", "audio_dte2_grp", "audio_dte3_grp" };
+static const char * const smart_card0_grps[] = { "smart_card0_grp",
+	"smart_card0_fcb_grp" };
+static const char * const smart_card1_grps[] = { "smart_card1_grp",
+	"smart_card1_fcb_grp" };
+static const char * const spi0_grps[] = { "spi0_grp" };
+static const char * const spi1_grps[] = { "spi1_grp" };
+static const char * const spi2_grps[] = { "spi2_grp" };
+static const char * const spi3_grps[] = { "spi3_grp" };
+static const char * const spi4_grps[] = { "spi4_0_grp", "spi4_1_grp" };
+static const char * const spi5_grps[] = { "spi5_grp" };
+
+static const char * const sw_led0_grps[] = { "sw_led0_0_grp",
+	"sw_led0_1_grp" };
+static const char * const sw_led1_grps[] = { "sw_led1_grp" };
+static const char * const sw_led2_grps[] = { "sw_led2_0_grp",
+	"sw_led2_1_grp" };
+static const char * const d1w_grps[] = { "d1w_grp" };
+static const char * const lcd_grps[] = { "lcd_grp" };
+static const char * const sram_grps[] = { "sram_0_grp", "sram_1_grp" };
+
+static const char * const uart0_grps[] = { "uart0_grp" };
+static const char * const uart1_grps[] = { "uart1_grp", "uart1_dte_grp" };
+static const char * const uart2_grps[] = { "uart2_grp" };
+static const char * const uart3_grps[] = { "uart3_grp" };
+static const char * const uart4_grps[] = { "uart4_grp" };
+static const char * const qspi_grps[] = { "qspi_0_grp", "qspi_1_grp" };
+static const char * const nand_grps[] = { "nand_grp" };
+static const char * const sdio0_grps[] = { "sdio0_grp", "sdio0_cd_grp",
+	"sdio0_mmc_grp" };
+static const char * const sdio1_grps[] = { "sdio1_data_0_grp",
+	"sdio1_data_1_grp", "sdio1_cd_grp", "sdio1_led_grp", "sdio1_mmc_grp" };
+static const char * const can0_grps[] = { "can0_grp" };
+static const char * const can1_grps[] = { "can1_grp" };
+static const char * const cam_grps[] = { "cam_led_grp", "cam_0_grp",
+	"cam_1_grp" };
+static const char * const bsc1_grps[] = { "bsc1_grp" };
+static const char * const pcie_clkreq_grps[] = { "pcie_clkreq_grp" };
+static const char * const usb0_oc_grps[] = { "usb0_oc_grp" };
+static const char * const usb1_oc_grps[] = { "usb1_oc_grp" };
+static const char * const usb2_oc_grps[] = { "usb2_oc_grp" };
+
+#define CYGNUS_PIN_FUNCTION(func)				\
+{								\
+	.name = #func,						\
+	.groups = func ## _grps,				\
+	.num_groups = ARRAY_SIZE(func ## _grps),		\
+}
+
+/*
+ * List of supported functions in Cygnus
+ */
+static const struct cygnus_pin_function cygnus_pin_functions[] = {
+	CYGNUS_PIN_FUNCTION(i2s0),
+	CYGNUS_PIN_FUNCTION(i2s1),
+	CYGNUS_PIN_FUNCTION(i2s2),
+	CYGNUS_PIN_FUNCTION(spdif),
+	CYGNUS_PIN_FUNCTION(pwm0),
+	CYGNUS_PIN_FUNCTION(pwm1),
+	CYGNUS_PIN_FUNCTION(pwm2),
+	CYGNUS_PIN_FUNCTION(pwm3),
+	CYGNUS_PIN_FUNCTION(pwm4),
+	CYGNUS_PIN_FUNCTION(pwm5),
+	CYGNUS_PIN_FUNCTION(key),
+	CYGNUS_PIN_FUNCTION(audio_dte),
+	CYGNUS_PIN_FUNCTION(smart_card0),
+	CYGNUS_PIN_FUNCTION(smart_card1),
+	CYGNUS_PIN_FUNCTION(spi0),
+	CYGNUS_PIN_FUNCTION(spi1),
+	CYGNUS_PIN_FUNCTION(spi2),
+	CYGNUS_PIN_FUNCTION(spi3),
+	CYGNUS_PIN_FUNCTION(spi4),
+	CYGNUS_PIN_FUNCTION(spi5),
+	CYGNUS_PIN_FUNCTION(sw_led0),
+	CYGNUS_PIN_FUNCTION(sw_led1),
+	CYGNUS_PIN_FUNCTION(sw_led2),
+	CYGNUS_PIN_FUNCTION(d1w),
+	CYGNUS_PIN_FUNCTION(lcd),
+	CYGNUS_PIN_FUNCTION(sram),
+	CYGNUS_PIN_FUNCTION(uart0),
+	CYGNUS_PIN_FUNCTION(uart1),
+	CYGNUS_PIN_FUNCTION(uart2),
+	CYGNUS_PIN_FUNCTION(uart3),
+	CYGNUS_PIN_FUNCTION(uart4),
+	CYGNUS_PIN_FUNCTION(qspi),
+	CYGNUS_PIN_FUNCTION(nand),
+	CYGNUS_PIN_FUNCTION(sdio0),
+	CYGNUS_PIN_FUNCTION(sdio1),
+	CYGNUS_PIN_FUNCTION(can0),
+	CYGNUS_PIN_FUNCTION(can1),
+	CYGNUS_PIN_FUNCTION(cam),
+	CYGNUS_PIN_FUNCTION(bsc1),
+	CYGNUS_PIN_FUNCTION(pcie_clkreq),
+	CYGNUS_PIN_FUNCTION(usb0_oc),
+	CYGNUS_PIN_FUNCTION(usb1_oc),
+	CYGNUS_PIN_FUNCTION(usb2_oc),
+};
+
+static int cygnus_get_groups_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_groups;
+}
+
+static const char *cygnus_get_group_name(struct pinctrl_dev *pctrl_dev,
+					 unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->groups[selector].name;
+}
+
+static int cygnus_get_group_pins(struct pinctrl_dev *pctrl_dev,
+				 unsigned selector, const unsigned **pins,
+				 unsigned *num_pins)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*pins = pinctrl->groups[selector].pins;
+	*num_pins = pinctrl->groups[selector].num_pins;
+
+	return 0;
+}
+
+static void cygnus_pin_dbg_show(struct pinctrl_dev *pctrl_dev,
+				struct seq_file *s, unsigned offset)
+{
+	seq_printf(s, " %s", dev_name(pctrl_dev->dev));
+}
+
+static bool cygnus_function_is_valid(const char *function_name)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cygnus_pin_functions); i++) {
+		if (!strcmp(cygnus_pin_functions[i].name, function_name))
+			return true;
+	}
+
+	return false;
+}
+
+/*
+ * TODO: Use API from pinctrl framework once "groups" parsing is supported
+ */
+static int cygnus_dt_node_to_map(struct pinctrl_dev *pctrl_dev,
+				 struct device_node *np,
+				 struct pinctrl_map **map,
+				 unsigned *num_maps)
+{
+	int ret, num_groups;
+	unsigned reserved_maps = 0;
+	struct property *prop;
+	const char *group_name, *function_name;
+
+	*map = NULL;
+	*num_maps = 0;
+
+	num_groups = of_property_count_strings(np, "groups");
+	if (num_groups < 0) {
+		dev_err(pctrl_dev->dev, "could not parse property groups\n");
+		return -EINVAL;
+	}
+
+	ret = of_property_read_string(np, "function", &function_name);
+	if (ret < 0) {
+		dev_err(pctrl_dev->dev,	"could not parse property function\n");
+		return -EINVAL;
+	}
+
+	/* check if it's a valid function */
+	if (!cygnus_function_is_valid(function_name)) {
+		dev_warn(pctrl_dev->dev, "invalid function name: %s\n",
+				function_name);
+	}
+
+	ret = pinctrl_utils_reserve_map(pctrl_dev, map, &reserved_maps,
+			num_maps, num_groups);
+	if (ret) {
+		dev_err(pctrl_dev->dev, "unable to reserve map\n");
+		return ret;
+	}
+
+	of_property_for_each_string(np, "groups", prop, group_name) {
+		ret = pinctrl_utils_add_map_mux(pctrl_dev, map,
+				&reserved_maps, num_maps, group_name,
+				function_name);
+		if (ret) {
+			dev_err(pctrl_dev->dev, "can't add map: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static struct pinctrl_ops cygnus_pinctrl_ops = {
+	.get_groups_count = cygnus_get_groups_count,
+	.get_group_name = cygnus_get_group_name,
+	.get_group_pins = cygnus_get_group_pins,
+	.pin_dbg_show = cygnus_pin_dbg_show,
+	.dt_node_to_map = cygnus_dt_node_to_map,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_functions;
+}
+
+static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
+					    unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->functions[selector].name;
+}
+
+static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
+				      unsigned selector,
+				      const char * const **groups,
+				      unsigned * const num_groups)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*groups = pinctrl->functions[selector].groups;
+	*num_groups = pinctrl->functions[selector].num_groups;
+
+	return 0;
+}
+
+static int cygnus_pinmux_set(struct cygnus_pinctrl *pinctrl,
+			     const struct cygnus_pin_function *func,
+			     const struct cygnus_pin_group *grp,
+			     struct cygnus_mux_log *mux_log)
+{
+	const struct cygnus_mux *mux = &grp->mux;
+	int i;
+	u32 val, mask = 0x7;
+	unsigned long flags;
+
+	for (i = 0; i < CYGNUS_NUM_IOMUX; i++) {
+		if (mux->offset != mux_log[i].mux.offset ||
+		    mux->shift != mux_log[i].mux.shift)
+			continue;
+
+		/* match found if we reach here */
+
+		/* if this is a new configuration, just do it! */
+		if (!mux_log[i].is_configured)
+			break;
+
+		/*
+		 * IOMUX has been configured previously and one is trying to
+		 * configure it to a different function
+		 */
+		if (mux_log[i].mux.alt != mux->alt) {
+			dev_err(pinctrl->dev,
+				"double configuration error detected!\n");
+			dev_err(pinctrl->dev, "func:%s grp:%s\n",
+				func->name, grp->name);
+			return -EINVAL;
+		} else {
+			/*
+			 * One tries to configure it to the same function.
+			 * Just quit and don't bother
+			 */
+			return 0;
+		}
+	}
+
+	mux_log[i].mux.alt = mux->alt;
+	mux_log[i].is_configured = true;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base0 + grp->mux.offset);
+	val &= ~(mask << grp->mux.shift);
+	val |= grp->mux.alt << grp->mux.shift;
+	writel(val, pinctrl->base0 + grp->mux.offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	return 0;
+}
+
+static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
+				 unsigned func_select, unsigned grp_select)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	const struct cygnus_pin_function *func =
+		&pinctrl->functions[func_select];
+	const struct cygnus_pin_group *grp = &pinctrl->groups[grp_select];
+
+	dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
+		func_select, func->name, grp_select, grp->name);
+
+	dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n",
+		grp->mux.offset, grp->mux.shift, grp->mux.alt);
+
+	return cygnus_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
+}
+
+static int cygnus_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
+				      struct pinctrl_gpio_range *range,
+				      unsigned pin)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
+	u32 val;
+	unsigned long flags;
+
+	/* not all pins support GPIO pinmux override */
+	if (!mux->is_supported)
+		return -ENOTSUPP;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base1 + mux->offset);
+	val |= 0x3 << mux->shift;
+	writel(val, pinctrl->base1 + mux->offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	dev_dbg(pctrl_dev->dev,
+		"gpio request enable pin=%u offset=0x%x shift=%u\n",
+		pin, mux->offset, mux->shift);
+
+	return 0;
+}
+
+static void cygnus_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
+				     struct pinctrl_gpio_range *range,
+				     unsigned pin)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
+	u32 val;
+	unsigned long flags;
+
+	if (!mux->is_supported)
+		return;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base1 + mux->offset);
+	val &= ~(0x3 << mux->shift);
+	writel(val, pinctrl->base1 + mux->offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	dev_err(pctrl_dev->dev,
+		"gpio disable free pin=%u offset=0x%x shift=%u\n",
+		pin, mux->offset, mux->shift);
+}
+
+static struct pinmux_ops cygnus_pinmux_ops = {
+	.get_functions_count = cygnus_get_functions_count,
+	.get_function_name = cygnus_get_function_name,
+	.get_function_groups = cygnus_get_function_groups,
+	.set_mux = cygnus_pinmux_set_mux,
+	.gpio_request_enable = cygnus_gpio_request_enable,
+	.gpio_disable_free = cygnus_gpio_disable_free,
+};
+
+static struct pinctrl_desc cygnus_pinctrl_desc = {
+	.name = "cygnus-pinmux",
+	.pctlops = &cygnus_pinctrl_ops,
+	.pmxops = &cygnus_pinmux_ops,
+};
+
+static int cygnus_mux_log_init(struct cygnus_pinctrl *pinctrl)
+{
+	struct cygnus_mux_log *log;
+	unsigned int i, j;
+
+	pinctrl->mux_log = devm_kcalloc(pinctrl->dev, CYGNUS_NUM_IOMUX,
+					sizeof(struct cygnus_mux_log),
+					GFP_KERNEL);
+	if (!pinctrl->mux_log)
+		return -ENOMEM;
+
+	log = pinctrl->mux_log;
+	for (i = 0; i < CYGNUS_NUM_IOMUX_REGS; i++) {
+		for (j = 0; j < CYGNUS_NUM_MUX_PER_REG; j++) {
+			log = &pinctrl->mux_log[i * CYGNUS_NUM_MUX_PER_REG
+				+ j];
+			log->mux.offset = i * 4;
+			log->mux.shift = j * 4;
+			log->mux.alt = 0;
+			log->is_configured = false;
+		}
+	}
+
+	return 0;
+}
+
+static int cygnus_pinmux_probe(struct platform_device *pdev)
+{
+	struct cygnus_pinctrl *pinctrl;
+	struct resource *res;
+	int i, ret;
+	struct pinctrl_pin_desc *pins;
+	unsigned num_pins = ARRAY_SIZE(cygnus_pins);
+
+	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
+	if (!pinctrl)
+		return -ENOMEM;
+
+	pinctrl->dev = &pdev->dev;
+	platform_set_drvdata(pdev, pinctrl);
+	spin_lock_init(&pinctrl->lock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pinctrl->base0)) {
+		dev_err(&pdev->dev, "unable to map I/O space\n");
+		return PTR_ERR(pinctrl->base0);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	pinctrl->base1 = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pinctrl->base1)) {
+		dev_err(&pdev->dev, "unable to map I/O space\n");
+		return PTR_ERR(pinctrl->base1);
+	}
+
+	ret = cygnus_mux_log_init(pinctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
+		return ret;
+	}
+
+	pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
+	if (!pins)
+		return -ENOMEM;
+
+	for (i = 0; i < num_pins; i++) {
+		pins[i].number = cygnus_pins[i].pin;
+		pins[i].name = cygnus_pins[i].name;
+		pins[i].drv_data = &cygnus_pins[i].gpio_mux;
+	}
+
+	pinctrl->groups = cygnus_pin_groups;
+	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
+	pinctrl->functions = cygnus_pin_functions;
+	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
+	cygnus_pinctrl_desc.pins = pins;
+	cygnus_pinctrl_desc.npins = num_pins;
+
+	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
+			pinctrl);
+	if (!pinctrl->pctl) {
+		dev_err(&pdev->dev, "unable to register Cygnus IOMUX pinctrl\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct of_device_id cygnus_pinmux_of_match[] = {
+	{ .compatible = "brcm,cygnus-pinmux" },
+	{ }
+};
+
+static struct platform_driver cygnus_pinmux_driver = {
+	.driver = {
+		.name = "cygnus-pinmux",
+		.of_match_table = cygnus_pinmux_of_match,
+	},
+	.probe = cygnus_pinmux_probe,
+};
+
+static int __init cygnus_pinmux_init(void)
+{
+	return platform_driver_register(&cygnus_pinmux_driver);
+}
+arch_initcall(cygnus_pinmux_init);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus IOMUX driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

Re: [PATCH v3 3/4] pinctrl: cygnus: add initial IOMUX driver support

[Dmitry Torokhov]

Hi Ray,

On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
> This adds the initial driver support for the Broadcom Cygnus IOMUX
> controller. The Cygnus IOMUX controller supports group based mux
> configuration but allows certain pins to be muxed to GPIO individually
> 
> Signed-off-by: Ray Jui <rjui@broadcom.com>
> Reviewed-by: Scott Branden <sbranden@broadcom.com>

Just a few random nits/comments...

> ---
>  drivers/pinctrl/bcm/Kconfig              |   13 +
>  drivers/pinctrl/bcm/Makefile             |    5 +-
>  drivers/pinctrl/bcm/pinctrl-cygnus-mux.c | 1087 ++++++++++++++++++++++++++++++
>  3 files changed, 1103 insertions(+), 2 deletions(-)
>  create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
> 
> diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
> index bc6d048..eb13201 100644
> --- a/drivers/pinctrl/bcm/Kconfig
> +++ b/drivers/pinctrl/bcm/Kconfig
> @@ -19,3 +19,16 @@ config PINCTRL_BCM2835
>  	bool
>  	select PINMUX
>  	select PINCONF
> +
> +config PINCTRL_CYGNUS_MUX
> +	bool "Broadcom Cygnus IOMUX driver"
> +	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
> +	select PINMUX
> +	select GENERIC_PINCONF
> +	default ARCH_BCM_CYGNUS
> +	help
> +	  Say yes here to enable the Broadcom Cygnus IOMUX driver.
> +
> +	  The Broadcom Cygnus IOMUX driver supports group based IOMUX
> +	  configuration, with the exception that certain individual pins
> +	  can be overrided to GPIO function
> diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
> index 7ba80a3..bb6beb6 100644
> --- a/drivers/pinctrl/bcm/Makefile
> +++ b/drivers/pinctrl/bcm/Makefile
> @@ -1,4 +1,5 @@
>  # Broadcom pinctrl support
>  
> -obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
> -obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
> +obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
> +obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
> +obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
> diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
> new file mode 100644
> index 0000000..33565b4
> --- /dev/null
> +++ b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
> @@ -0,0 +1,1087 @@
> +/* Copyright (C) 2014-2015 Broadcom Corporation
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * This file contains the Cygnus IOMUX driver that supports group based PINMUX
> + * configuration. Although PINMUX configuration is mainly group based, the
> + * Cygnus IOMUX controller allows certain pins to be individually muxed to GPIO
> + * function, and therefore be controlled by the Cygnus ASIU GPIO controller
> + */
> +
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/slab.h>
> +#include <linux/platform_device.h>
> +#include <linux/pinctrl/pinctrl.h>
> +#include <linux/pinctrl/pinmux.h>
> +#include <linux/pinctrl/pinconf.h>
> +#include <linux/pinctrl/pinconf-generic.h>
> +#include "../core.h"
> +#include "../pinctrl-utils.h"
> +
> +#define CYGNUS_NUM_IOMUX_REGS     8
> +#define CYGNUS_NUM_MUX_PER_REG    8
> +#define CYGNUS_NUM_IOMUX          (CYGNUS_NUM_IOMUX_REGS * \
> +				   CYGNUS_NUM_MUX_PER_REG)
> +
> +/*
> + * Cygnus IOMUX register description
> + *
> + * @offset: register offset for mux configuration of a group
> + * @shift: bit shift for mux configuration of a group
> + * @alt: alternate function to set to
> + */
> +struct cygnus_mux {
> +	unsigned int offset;
> +	unsigned int shift;
> +	unsigned int alt;
> +};
> +
> +/*
> + * Keep track of Cygnus IOMUX configuration and prevent double configuration
> + *
> + * @cygnus_mux: Cygnus IOMUX register description
> + * @is_configured: flag to indicate whether a mux setting has already been
> + * configured
> + */
> +struct cygnus_mux_log {
> +	struct cygnus_mux mux;
> +	bool is_configured;
> +};
> +
> +/*
> + * Group based IOMUX configuration
> + *
> + * @name: name of the group
> + * @pins: array of pins used by this group
> + * @num_pins: total number of pins used by this group
> + * @mux: Cygnus group based IOMUX configuration
> + */
> +struct cygnus_pin_group {
> +	const char *name;
> +	const unsigned *pins;
> +	const unsigned num_pins;
> +	const struct cygnus_mux mux;

Not: the last 2 consts are quite weird - if you want to make an instance
of cygnus_pin_group immutable you declare it as a const (and I see you
are already doing that below). With the structure as it laid out
currently you can only do static initializers.

> +};
> +
> +/*
> + * Cygnus mux function and supported pin groups
> + *
> + * @name: name of the function
> + * @groups: array of groups that can be supported by this function
> + * @num_groups: total number of groups that can be supported by this function
> + */
> +struct cygnus_pin_function {
> +	const char *name;
> +	const char * const *groups;
> +	const unsigned num_groups;

Here as well.

...

> +
> +/*
> + * List of pins in Cygnus
> + */
> +static struct cygnus_pin cygnus_pins[] = {

const?

> +	CYGNUS_PIN_DESC(0, "ext_device_reset_n", 0, 0, 0),
> +	CYGNUS_PIN_DESC(1, "chip_mode0", 0, 0, 0),

...

> +#define CYGNUS_PIN_GROUP(group_name, off, sh, al)	\
> +{							\
> +	.name = #group_name"""_grp",			\

Why do we need extra pair of quotes? BTW we can also do

	.name = __stringify(group_name) "_grp",

> +	.pins = group_name ## _pins,			\
> +	.num_pins = ARRAY_SIZE(group_name ## _pins),	\
> +	.mux = {					\
> +		.offset = off,				\
> +		.shift = sh,				\
> +		.alt = al,				\
> +	}						\
> +}

...

> +
> +static struct pinctrl_ops cygnus_pinctrl_ops = {

const?

> +	.get_groups_count = cygnus_get_groups_count,
> +	.get_group_name = cygnus_get_group_name,
> +	.get_group_pins = cygnus_get_group_pins,
> +	.pin_dbg_show = cygnus_pin_dbg_show,
> +	.dt_node_to_map = cygnus_dt_node_to_map,
> +	.dt_free_map = pinctrl_utils_dt_free_map,
> +};
> +
> +static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +
> +	return pinctrl->num_functions;
> +}
> +
> +static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
> +					    unsigned selector)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +
> +	return pinctrl->functions[selector].name;
> +}
> +
> +static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
> +				      unsigned selector,
> +				      const char * const **groups,
> +				      unsigned * const num_groups)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +
> +	*groups = pinctrl->functions[selector].groups;
> +	*num_groups = pinctrl->functions[selector].num_groups;
> +
> +	return 0;
> +}
> +
> +static int cygnus_pinmux_set(struct cygnus_pinctrl *pinctrl,
> +			     const struct cygnus_pin_function *func,
> +			     const struct cygnus_pin_group *grp,
> +			     struct cygnus_mux_log *mux_log)
> +{
> +	const struct cygnus_mux *mux = &grp->mux;
> +	int i;
> +	u32 val, mask = 0x7;
> +	unsigned long flags;
> +
> +	for (i = 0; i < CYGNUS_NUM_IOMUX; i++) {
> +		if (mux->offset != mux_log[i].mux.offset ||
> +		    mux->shift != mux_log[i].mux.shift)
> +			continue;
> +
> +		/* match found if we reach here */
> +
> +		/* if this is a new configuration, just do it! */
> +		if (!mux_log[i].is_configured)
> +			break;
> +
> +		/*
> +		 * IOMUX has been configured previously and one is trying to
> +		 * configure it to a different function
> +		 */
> +		if (mux_log[i].mux.alt != mux->alt) {
> +			dev_err(pinctrl->dev,
> +				"double configuration error detected!\n");
> +			dev_err(pinctrl->dev, "func:%s grp:%s\n",
> +				func->name, grp->name);
> +			return -EINVAL;
> +		} else {
> +			/*
> +			 * One tries to configure it to the same function.
> +			 * Just quit and don't bother
> +			 */
> +			return 0;
> +		}
> +	}
> +
> +	mux_log[i].mux.alt = mux->alt;
> +	mux_log[i].is_configured = true;
> +
> +	spin_lock_irqsave(&pinctrl->lock, flags);
> +
> +	val = readl(pinctrl->base0 + grp->mux.offset);
> +	val &= ~(mask << grp->mux.shift);
> +	val |= grp->mux.alt << grp->mux.shift;
> +	writel(val, pinctrl->base0 + grp->mux.offset);
> +
> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
> +
> +	return 0;
> +}
> +
> +static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
> +				 unsigned func_select, unsigned grp_select)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +	const struct cygnus_pin_function *func =
> +		&pinctrl->functions[func_select];
> +	const struct cygnus_pin_group *grp = &pinctrl->groups[grp_select];
> +
> +	dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
> +		func_select, func->name, grp_select, grp->name);
> +
> +	dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n",
> +		grp->mux.offset, grp->mux.shift, grp->mux.alt);
> +
> +	return cygnus_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
> +}
> +
> +static int cygnus_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
> +				      struct pinctrl_gpio_range *range,
> +				      unsigned pin)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;

const?

> +	u32 val;
> +	unsigned long flags;
> +
> +	/* not all pins support GPIO pinmux override */
> +	if (!mux->is_supported)
> +		return -ENOTSUPP;
> +
> +	spin_lock_irqsave(&pinctrl->lock, flags);
> +
> +	val = readl(pinctrl->base1 + mux->offset);
> +	val |= 0x3 << mux->shift;
> +	writel(val, pinctrl->base1 + mux->offset);
> +
> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
> +
> +	dev_dbg(pctrl_dev->dev,
> +		"gpio request enable pin=%u offset=0x%x shift=%u\n",
> +		pin, mux->offset, mux->shift);
> +
> +	return 0;
> +}
> +
> +static void cygnus_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
> +				     struct pinctrl_gpio_range *range,
> +				     unsigned pin)
> +{
> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
> +	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
> +	u32 val;
> +	unsigned long flags;
> +
> +	if (!mux->is_supported)
> +		return;
> +
> +	spin_lock_irqsave(&pinctrl->lock, flags);
> +
> +	val = readl(pinctrl->base1 + mux->offset);
> +	val &= ~(0x3 << mux->shift);
> +	writel(val, pinctrl->base1 + mux->offset);
> +
> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
> +
> +	dev_err(pctrl_dev->dev,
> +		"gpio disable free pin=%u offset=0x%x shift=%u\n",
> +		pin, mux->offset, mux->shift);
> +}
> +
> +static struct pinmux_ops cygnus_pinmux_ops = {

const?

> +	.get_functions_count = cygnus_get_functions_count,
> +	.get_function_name = cygnus_get_function_name,
> +	.get_function_groups = cygnus_get_function_groups,
> +	.set_mux = cygnus_pinmux_set_mux,
> +	.gpio_request_enable = cygnus_gpio_request_enable,
> +	.gpio_disable_free = cygnus_gpio_disable_free,
> +};
> +
> +static struct pinctrl_desc cygnus_pinctrl_desc = {
> +	.name = "cygnus-pinmux",
> +	.pctlops = &cygnus_pinctrl_ops,
> +	.pmxops = &cygnus_pinmux_ops,
> +};
> +
> +static int cygnus_mux_log_init(struct cygnus_pinctrl *pinctrl)
> +{
> +	struct cygnus_mux_log *log;
> +	unsigned int i, j;
> +
> +	pinctrl->mux_log = devm_kcalloc(pinctrl->dev, CYGNUS_NUM_IOMUX,
> +					sizeof(struct cygnus_mux_log),
> +					GFP_KERNEL);
> +	if (!pinctrl->mux_log)
> +		return -ENOMEM;
> +
> +	log = pinctrl->mux_log;
> +	for (i = 0; i < CYGNUS_NUM_IOMUX_REGS; i++) {
> +		for (j = 0; j < CYGNUS_NUM_MUX_PER_REG; j++) {
> +			log = &pinctrl->mux_log[i * CYGNUS_NUM_MUX_PER_REG
> +				+ j];
> +			log->mux.offset = i * 4;
> +			log->mux.shift = j * 4;
> +			log->mux.alt = 0;
> +			log->is_configured = false;
> +		}
> +	}
> +
> +	return 0;
> +}
> +
> +static int cygnus_pinmux_probe(struct platform_device *pdev)
> +{
> +	struct cygnus_pinctrl *pinctrl;
> +	struct resource *res;
> +	int i, ret;
> +	struct pinctrl_pin_desc *pins;
> +	unsigned num_pins = ARRAY_SIZE(cygnus_pins);
> +
> +	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
> +	if (!pinctrl)
> +		return -ENOMEM;
> +
> +	pinctrl->dev = &pdev->dev;
> +	platform_set_drvdata(pdev, pinctrl);
> +	spin_lock_init(&pinctrl->lock);
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(pinctrl->base0)) {
> +		dev_err(&pdev->dev, "unable to map I/O space\n");
> +		return PTR_ERR(pinctrl->base0);
> +	}
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> +	pinctrl->base1 = devm_ioremap_resource(&pdev->dev, res);
> +	if (IS_ERR(pinctrl->base1)) {
> +		dev_err(&pdev->dev, "unable to map I/O space\n");
> +		return PTR_ERR(pinctrl->base1);
> +	}
> +
> +	ret = cygnus_mux_log_init(pinctrl);
> +	if (ret) {
> +		dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
> +		return ret;
> +	}
> +
> +	pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
> +	if (!pins)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < num_pins; i++) {
> +		pins[i].number = cygnus_pins[i].pin;
> +		pins[i].name = cygnus_pins[i].name;
> +		pins[i].drv_data = &cygnus_pins[i].gpio_mux;
> +	}
> +
> +	pinctrl->groups = cygnus_pin_groups;
> +	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
> +	pinctrl->functions = cygnus_pin_functions;
> +	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
> +	cygnus_pinctrl_desc.pins = pins;
> +	cygnus_pinctrl_desc.npins = num_pins;
> +
> +	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
> +			pinctrl);
> +	if (!pinctrl->pctl) {
> +		dev_err(&pdev->dev, "unable to register Cygnus IOMUX pinctrl\n");
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static struct of_device_id cygnus_pinmux_of_match[] = {
> +	{ .compatible = "brcm,cygnus-pinmux" },
> +	{ }
> +};
> +
> +static struct platform_driver cygnus_pinmux_driver = {
> +	.driver = {
> +		.name = "cygnus-pinmux",
> +		.of_match_table = cygnus_pinmux_of_match,
> +	},
> +	.probe = cygnus_pinmux_probe,

You also need to either provide remove() method or disallow unbinding
via sysfs by setting suppress_bind_attrs in platform driver.

> +};
> +
> +static int __init cygnus_pinmux_init(void)
> +{
> +	return platform_driver_register(&cygnus_pinmux_driver);
> +}
> +arch_initcall(cygnus_pinmux_init);
> +
> +MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
> +MODULE_DESCRIPTION("Broadcom Cygnus IOMUX driver");
> +MODULE_LICENSE("GPL v2");
> -- 
> 1.7.9.5
> 

Thanks.

-- 
Dmitry

Re: [PATCH v3 3/4] pinctrl: cygnus: add initial IOMUX driver support

[Ray Jui]

On 2/3/2015 9:40 AM, Dmitry Torokhov wrote:
> Hi Ray,
> 
> On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
>> This adds the initial driver support for the Broadcom Cygnus IOMUX
>> controller. The Cygnus IOMUX controller supports group based mux
>> configuration but allows certain pins to be muxed to GPIO individually
>>
>> Signed-off-by: Ray Jui <rjui@broadcom.com>
>> Reviewed-by: Scott Branden <sbranden@broadcom.com>
> 
> Just a few random nits/comments...
> 
>> ---
>>  drivers/pinctrl/bcm/Kconfig              |   13 +
>>  drivers/pinctrl/bcm/Makefile             |    5 +-
>>  drivers/pinctrl/bcm/pinctrl-cygnus-mux.c | 1087 ++++++++++++++++++++++++++++++
>>  3 files changed, 1103 insertions(+), 2 deletions(-)
>>  create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
>>
>> diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
>> index bc6d048..eb13201 100644
>> --- a/drivers/pinctrl/bcm/Kconfig
>> +++ b/drivers/pinctrl/bcm/Kconfig
>> @@ -19,3 +19,16 @@ config PINCTRL_BCM2835
>>  	bool
>>  	select PINMUX
>>  	select PINCONF
>> +
>> +config PINCTRL_CYGNUS_MUX
>> +	bool "Broadcom Cygnus IOMUX driver"
>> +	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
>> +	select PINMUX
>> +	select GENERIC_PINCONF
>> +	default ARCH_BCM_CYGNUS
>> +	help
>> +	  Say yes here to enable the Broadcom Cygnus IOMUX driver.
>> +
>> +	  The Broadcom Cygnus IOMUX driver supports group based IOMUX
>> +	  configuration, with the exception that certain individual pins
>> +	  can be overrided to GPIO function
>> diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
>> index 7ba80a3..bb6beb6 100644
>> --- a/drivers/pinctrl/bcm/Makefile
>> +++ b/drivers/pinctrl/bcm/Makefile
>> @@ -1,4 +1,5 @@
>>  # Broadcom pinctrl support
>>  
>> -obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
>> -obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
>> +obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
>> +obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
>> +obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
>> diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
>> new file mode 100644
>> index 0000000..33565b4
>> --- /dev/null
>> +++ b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
>> @@ -0,0 +1,1087 @@
>> +/* Copyright (C) 2014-2015 Broadcom Corporation
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License as
>> + * published by the Free Software Foundation version 2.
>> + *
>> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
>> + * kind, whether express or implied; without even the implied warranty
>> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> + * GNU General Public License for more details.
>> + *
>> + * This file contains the Cygnus IOMUX driver that supports group based PINMUX
>> + * configuration. Although PINMUX configuration is mainly group based, the
>> + * Cygnus IOMUX controller allows certain pins to be individually muxed to GPIO
>> + * function, and therefore be controlled by the Cygnus ASIU GPIO controller
>> + */
>> +
>> +#include <linux/err.h>
>> +#include <linux/io.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/slab.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/pinctrl/pinctrl.h>
>> +#include <linux/pinctrl/pinmux.h>
>> +#include <linux/pinctrl/pinconf.h>
>> +#include <linux/pinctrl/pinconf-generic.h>
>> +#include "../core.h"
>> +#include "../pinctrl-utils.h"
>> +
>> +#define CYGNUS_NUM_IOMUX_REGS     8
>> +#define CYGNUS_NUM_MUX_PER_REG    8
>> +#define CYGNUS_NUM_IOMUX          (CYGNUS_NUM_IOMUX_REGS * \
>> +				   CYGNUS_NUM_MUX_PER_REG)
>> +
>> +/*
>> + * Cygnus IOMUX register description
>> + *
>> + * @offset: register offset for mux configuration of a group
>> + * @shift: bit shift for mux configuration of a group
>> + * @alt: alternate function to set to
>> + */
>> +struct cygnus_mux {
>> +	unsigned int offset;
>> +	unsigned int shift;
>> +	unsigned int alt;
>> +};
>> +
>> +/*
>> + * Keep track of Cygnus IOMUX configuration and prevent double configuration
>> + *
>> + * @cygnus_mux: Cygnus IOMUX register description
>> + * @is_configured: flag to indicate whether a mux setting has already been
>> + * configured
>> + */
>> +struct cygnus_mux_log {
>> +	struct cygnus_mux mux;
>> +	bool is_configured;
>> +};
>> +
>> +/*
>> + * Group based IOMUX configuration
>> + *
>> + * @name: name of the group
>> + * @pins: array of pins used by this group
>> + * @num_pins: total number of pins used by this group
>> + * @mux: Cygnus group based IOMUX configuration
>> + */
>> +struct cygnus_pin_group {
>> +	const char *name;
>> +	const unsigned *pins;
>> +	const unsigned num_pins;
>> +	const struct cygnus_mux mux;
> 
> Not: the last 2 consts are quite weird - if you want to make an instance
> of cygnus_pin_group immutable you declare it as a const (and I see you
> are already doing that below). With the structure as it laid out
> currently you can only do static initializers.
> 
Right. I'll remove the last two const.

>> +};
>> +
>> +/*
>> + * Cygnus mux function and supported pin groups
>> + *
>> + * @name: name of the function
>> + * @groups: array of groups that can be supported by this function
>> + * @num_groups: total number of groups that can be supported by this function
>> + */
>> +struct cygnus_pin_function {
>> +	const char *name;
>> +	const char * const *groups;
>> +	const unsigned num_groups;
> 
> Here as well.
> 
> ...
> 
Yes. Will remove the last const.

>> +
>> +/*
>> + * List of pins in Cygnus
>> + */
>> +static struct cygnus_pin cygnus_pins[] = {
> 
> const?
> 
I cannot make it const here, since the address of "gpio_mux" is later
passed to pinctrl_pin_desc's private data:

pins[i].drv_data = &cygnus_pins[i].gpio_mux;

>> +	CYGNUS_PIN_DESC(0, "ext_device_reset_n", 0, 0, 0),
>> +	CYGNUS_PIN_DESC(1, "chip_mode0", 0, 0, 0),
> 
> ...
> 
>> +#define CYGNUS_PIN_GROUP(group_name, off, sh, al)	\
>> +{							\
>> +	.name = #group_name"""_grp",			\
> 
> Why do we need extra pair of quotes? BTW we can also do
> 
> 	.name = __stringify(group_name) "_grp",
> 
Okay. I will change to use __stringify. Thanks.

>> +	.pins = group_name ## _pins,			\
>> +	.num_pins = ARRAY_SIZE(group_name ## _pins),	\
>> +	.mux = {					\
>> +		.offset = off,				\
>> +		.shift = sh,				\
>> +		.alt = al,				\
>> +	}						\
>> +}
> 
> ...
> 
>> +
>> +static struct pinctrl_ops cygnus_pinctrl_ops = {
> 
> const?
> 
Yes.

>> +	.get_groups_count = cygnus_get_groups_count,
>> +	.get_group_name = cygnus_get_group_name,
>> +	.get_group_pins = cygnus_get_group_pins,
>> +	.pin_dbg_show = cygnus_pin_dbg_show,
>> +	.dt_node_to_map = cygnus_dt_node_to_map,
>> +	.dt_free_map = pinctrl_utils_dt_free_map,
>> +};
>> +
>> +static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +
>> +	return pinctrl->num_functions;
>> +}
>> +
>> +static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
>> +					    unsigned selector)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +
>> +	return pinctrl->functions[selector].name;
>> +}
>> +
>> +static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
>> +				      unsigned selector,
>> +				      const char * const **groups,
>> +				      unsigned * const num_groups)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +
>> +	*groups = pinctrl->functions[selector].groups;
>> +	*num_groups = pinctrl->functions[selector].num_groups;
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_pinmux_set(struct cygnus_pinctrl *pinctrl,
>> +			     const struct cygnus_pin_function *func,
>> +			     const struct cygnus_pin_group *grp,
>> +			     struct cygnus_mux_log *mux_log)
>> +{
>> +	const struct cygnus_mux *mux = &grp->mux;
>> +	int i;
>> +	u32 val, mask = 0x7;
>> +	unsigned long flags;
>> +
>> +	for (i = 0; i < CYGNUS_NUM_IOMUX; i++) {
>> +		if (mux->offset != mux_log[i].mux.offset ||
>> +		    mux->shift != mux_log[i].mux.shift)
>> +			continue;
>> +
>> +		/* match found if we reach here */
>> +
>> +		/* if this is a new configuration, just do it! */
>> +		if (!mux_log[i].is_configured)
>> +			break;
>> +
>> +		/*
>> +		 * IOMUX has been configured previously and one is trying to
>> +		 * configure it to a different function
>> +		 */
>> +		if (mux_log[i].mux.alt != mux->alt) {
>> +			dev_err(pinctrl->dev,
>> +				"double configuration error detected!\n");
>> +			dev_err(pinctrl->dev, "func:%s grp:%s\n",
>> +				func->name, grp->name);
>> +			return -EINVAL;
>> +		} else {
>> +			/*
>> +			 * One tries to configure it to the same function.
>> +			 * Just quit and don't bother
>> +			 */
>> +			return 0;
>> +		}
>> +	}
>> +
>> +	mux_log[i].mux.alt = mux->alt;
>> +	mux_log[i].is_configured = true;
>> +
>> +	spin_lock_irqsave(&pinctrl->lock, flags);
>> +
>> +	val = readl(pinctrl->base0 + grp->mux.offset);
>> +	val &= ~(mask << grp->mux.shift);
>> +	val |= grp->mux.alt << grp->mux.shift;
>> +	writel(val, pinctrl->base0 + grp->mux.offset);
>> +
>> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
>> +				 unsigned func_select, unsigned grp_select)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +	const struct cygnus_pin_function *func =
>> +		&pinctrl->functions[func_select];
>> +	const struct cygnus_pin_group *grp = &pinctrl->groups[grp_select];
>> +
>> +	dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
>> +		func_select, func->name, grp_select, grp->name);
>> +
>> +	dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n",
>> +		grp->mux.offset, grp->mux.shift, grp->mux.alt);
>> +
>> +	return cygnus_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
>> +}
>> +
>> +static int cygnus_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
>> +				      struct pinctrl_gpio_range *range,
>> +				      unsigned pin)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
> 
> const?
> 
Yes.

>> +	u32 val;
>> +	unsigned long flags;
>> +
>> +	/* not all pins support GPIO pinmux override */
>> +	if (!mux->is_supported)
>> +		return -ENOTSUPP;
>> +
>> +	spin_lock_irqsave(&pinctrl->lock, flags);
>> +
>> +	val = readl(pinctrl->base1 + mux->offset);
>> +	val |= 0x3 << mux->shift;
>> +	writel(val, pinctrl->base1 + mux->offset);
>> +
>> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
>> +
>> +	dev_dbg(pctrl_dev->dev,
>> +		"gpio request enable pin=%u offset=0x%x shift=%u\n",
>> +		pin, mux->offset, mux->shift);
>> +
>> +	return 0;
>> +}
>> +
>> +static void cygnus_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
>> +				     struct pinctrl_gpio_range *range,
>> +				     unsigned pin)
>> +{
>> +	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
>> +	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
>> +	u32 val;
>> +	unsigned long flags;
>> +
>> +	if (!mux->is_supported)
>> +		return;
>> +
>> +	spin_lock_irqsave(&pinctrl->lock, flags);
>> +
>> +	val = readl(pinctrl->base1 + mux->offset);
>> +	val &= ~(0x3 << mux->shift);
>> +	writel(val, pinctrl->base1 + mux->offset);
>> +
>> +	spin_unlock_irqrestore(&pinctrl->lock, flags);
>> +
>> +	dev_err(pctrl_dev->dev,
>> +		"gpio disable free pin=%u offset=0x%x shift=%u\n",
>> +		pin, mux->offset, mux->shift);
>> +}
>> +
>> +static struct pinmux_ops cygnus_pinmux_ops = {
> 
> const?
> 
Yes.

>> +	.get_functions_count = cygnus_get_functions_count,
>> +	.get_function_name = cygnus_get_function_name,
>> +	.get_function_groups = cygnus_get_function_groups,
>> +	.set_mux = cygnus_pinmux_set_mux,
>> +	.gpio_request_enable = cygnus_gpio_request_enable,
>> +	.gpio_disable_free = cygnus_gpio_disable_free,
>> +};
>> +
>> +static struct pinctrl_desc cygnus_pinctrl_desc = {
>> +	.name = "cygnus-pinmux",
>> +	.pctlops = &cygnus_pinctrl_ops,
>> +	.pmxops = &cygnus_pinmux_ops,
>> +};
>> +
>> +static int cygnus_mux_log_init(struct cygnus_pinctrl *pinctrl)
>> +{
>> +	struct cygnus_mux_log *log;
>> +	unsigned int i, j;
>> +
>> +	pinctrl->mux_log = devm_kcalloc(pinctrl->dev, CYGNUS_NUM_IOMUX,
>> +					sizeof(struct cygnus_mux_log),
>> +					GFP_KERNEL);
>> +	if (!pinctrl->mux_log)
>> +		return -ENOMEM;
>> +
>> +	log = pinctrl->mux_log;
>> +	for (i = 0; i < CYGNUS_NUM_IOMUX_REGS; i++) {
>> +		for (j = 0; j < CYGNUS_NUM_MUX_PER_REG; j++) {
>> +			log = &pinctrl->mux_log[i * CYGNUS_NUM_MUX_PER_REG
>> +				+ j];
>> +			log->mux.offset = i * 4;
>> +			log->mux.shift = j * 4;
>> +			log->mux.alt = 0;
>> +			log->is_configured = false;
>> +		}
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_pinmux_probe(struct platform_device *pdev)
>> +{
>> +	struct cygnus_pinctrl *pinctrl;
>> +	struct resource *res;
>> +	int i, ret;
>> +	struct pinctrl_pin_desc *pins;
>> +	unsigned num_pins = ARRAY_SIZE(cygnus_pins);
>> +
>> +	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
>> +	if (!pinctrl)
>> +		return -ENOMEM;
>> +
>> +	pinctrl->dev = &pdev->dev;
>> +	platform_set_drvdata(pdev, pinctrl);
>> +	spin_lock_init(&pinctrl->lock);
>> +
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +	pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
>> +	if (IS_ERR(pinctrl->base0)) {
>> +		dev_err(&pdev->dev, "unable to map I/O space\n");
>> +		return PTR_ERR(pinctrl->base0);
>> +	}
>> +
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
>> +	pinctrl->base1 = devm_ioremap_resource(&pdev->dev, res);
>> +	if (IS_ERR(pinctrl->base1)) {
>> +		dev_err(&pdev->dev, "unable to map I/O space\n");
>> +		return PTR_ERR(pinctrl->base1);
>> +	}
>> +
>> +	ret = cygnus_mux_log_init(pinctrl);
>> +	if (ret) {
>> +		dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
>> +		return ret;
>> +	}
>> +
>> +	pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
>> +	if (!pins)
>> +		return -ENOMEM;
>> +
>> +	for (i = 0; i < num_pins; i++) {
>> +		pins[i].number = cygnus_pins[i].pin;
>> +		pins[i].name = cygnus_pins[i].name;
>> +		pins[i].drv_data = &cygnus_pins[i].gpio_mux;
>> +	}
>> +
>> +	pinctrl->groups = cygnus_pin_groups;
>> +	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
>> +	pinctrl->functions = cygnus_pin_functions;
>> +	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
>> +	cygnus_pinctrl_desc.pins = pins;
>> +	cygnus_pinctrl_desc.npins = num_pins;
>> +
>> +	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
>> +			pinctrl);
>> +	if (!pinctrl->pctl) {
>> +		dev_err(&pdev->dev, "unable to register Cygnus IOMUX pinctrl\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>> +static struct of_device_id cygnus_pinmux_of_match[] = {
>> +	{ .compatible = "brcm,cygnus-pinmux" },
>> +	{ }
>> +};
>> +
>> +static struct platform_driver cygnus_pinmux_driver = {
>> +	.driver = {
>> +		.name = "cygnus-pinmux",
>> +		.of_match_table = cygnus_pinmux_of_match,
>> +	},
>> +	.probe = cygnus_pinmux_probe,
> 
> You also need to either provide remove() method or disallow unbinding
> via sysfs by setting suppress_bind_attrs in platform driver.
> 
I do not expect this driver to ever be compiled as module and
uninstalled at runtime. I'll add .suppress_bind_attrs = true, thanks!
>> +};
>> +
>> +static int __init cygnus_pinmux_init(void)
>> +{
>> +	return platform_driver_register(&cygnus_pinmux_driver);
>> +}
>> +arch_initcall(cygnus_pinmux_init);
>> +
>> +MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
>> +MODULE_DESCRIPTION("Broadcom Cygnus IOMUX driver");
>> +MODULE_LICENSE("GPL v2");
>> -- 
>> 1.7.9.5
>>
> 
> Thanks.
> 
Thanks for the review!

Ray

Re: [PATCH v3 3/4] pinctrl: cygnus: add initial IOMUX driver support

[Dmitry Torokhov]

On Tue, Feb 03, 2015 at 11:29:36AM -0800, Ray Jui wrote:
> On 2/3/2015 9:40 AM, Dmitry Torokhov wrote:
> > On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
> >> +
> >> +/*
> >> + * List of pins in Cygnus
> >> + */
> >> +static struct cygnus_pin cygnus_pins[] = {
> > 
> > const?
> > 
> I cannot make it const here, since the address of "gpio_mux" is later
> passed to pinctrl_pin_desc's private data:
> 
> pins[i].drv_data = &cygnus_pins[i].gpio_mux;

The pinctrl code says:

"@drv_data: driver-defined per-pin data. pinctrl core does not touch
this"

so we could theoretically cast away the constness and restore it when
we access drv_data in pin control methods, but I won't insist. I am
not sure which way looks nicer.

Thanks.

-- 
Dmitry

Re: [PATCH v3 3/4] pinctrl: cygnus: add initial IOMUX driver support

[Ray Jui]

On 2/3/2015 12:00 PM, Dmitry Torokhov wrote:
> On Tue, Feb 03, 2015 at 11:29:36AM -0800, Ray Jui wrote:
>> On 2/3/2015 9:40 AM, Dmitry Torokhov wrote:
>>> On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
>>>> +
>>>> +/*
>>>> + * List of pins in Cygnus
>>>> + */
>>>> +static struct cygnus_pin cygnus_pins[] = {
>>>
>>> const?
>>>
>> I cannot make it const here, since the address of "gpio_mux" is later
>> passed to pinctrl_pin_desc's private data:
>>
>> pins[i].drv_data = &cygnus_pins[i].gpio_mux;
> 
> The pinctrl code says:
> 
> "@drv_data: driver-defined per-pin data. pinctrl core does not touch
> this"
> 
> so we could theoretically cast away the constness and restore it when
> we access drv_data in pin control methods, but I won't insist. I am
> not sure which way looks nicer.
> 
> Thanks.
> 
Yeah, I agreed that by declaring the cygnus_pins array const, it makes
it more obvious that "we do not expect any of its parameters to change."
But later if we cast &gpio_mux to void * before assigned to drv_data of
pinctrl_pin_desc, we sort of break it up...I'll keep this part of code
as it is for now.

Thanks,

Ray

[PATCH v3 4/4] ARM: dts: enable IOMUX for Broadcom Cygnus

[Ray Jui]

This enables the IOMUX support for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..b014ce5 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,12 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	pinctrl: pinctrl@0x0301d0c8 {
+		compatible = "brcm,cygnus-pinmux";
+		reg = <0x0301d0c8 0x30>,
+		      <0x0301d24c 0x2c>;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v7 0/4] Add gpio/pinconf support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO/PINCONF support for the Broadcom
Cygnus SoC.

Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the this driver.

All 3 Cygnus GPIO controllers support basic PINCONF functions such as bias
pull up, pull down, and drive strength configurations, when these pins are
muxed to GPIO.

Pins from the ASIU GPIO can be individually muxed to GPIO function, through
interaction with the Cygnus IOMUX controller.

Note this patchset has a dependency on the other patchset "Add pinctrl support
to Broadcom Cygnus SoC" that is also under review

Changes from v6:
 - Move the driver from drivers/gpio/* to drivers/pinctrl/* since this driver
   supports both GPIO and some basic PINCONF features
 - Support PINCONF features through standard DT subnodes properties including
   "bias-disable", "bias-pull-up", "bias-pull-down", and "drive-strength", by
   creating local PINCONF controller
 - Add support to allow individual ASIU GPIO pins to be muxed as GPIO, through
   interactions with the Cygnus IOMUX driver
 - Convert the driver to use standard GPIOCHIP_IRQ APIs. This helps to reduce
   customized code in the driver
 - Other miscellaneous imrpovements in the driver
 - Enable GPIO based phone hook detection support for BCM911360 phone factor
   board

Changes from v5:
 - Get rid of DT property "linux,gpio-base". Use dynamic allocation for GPIO base
   number

Changes from v4:
 - Use DT property "linux,gpio-base" to define GPIO base number
 - factorize common code to improve code readability and reduce code size
 - remove "bcm_" prefix on function and struct names
 - improve debugging prints
 - default GPIO_BCM_CYGNUS to y in Kconfig (it still depends on
   ARCH_BCM_CYGNUS). This way we do not need to select it from the
   arch/arm/mach-bcm/Kconfig
 - Get rid of redundant MAINTAINER entry for this driver. It will be maintained
   by Broadcom iProc/Cygnus maintainers
 - Update device tree document based on driver changes

Changes from v3:
 - Fix dt property tpyo
 - Fix incorrect GPIO compatible ID in device tree binding document example

Changes from v2:
 - Consolidate different compatible IDs into "brcm,cygnus-gpio"
 - Get rid of redundant "no-interrupt" property

Changes from v1:
 - Get rid of inline qualifier
 - Get rid of redundant check in the ISR
 - Other minor fixes to imrove code readability

Ray Jui (4):
  pinctrl: Cygnus: define Broadcom Cygnus GPIO/PINCONF binding
  pinctrl: cygnus: add gpio/pinconf driver
  ARM: dts: enable GPIO for Broadcom Cygnus
  ARM: dts: cygnus: enable GPIO based hook detection

 .../bindings/pinctrl/brcm,cygnus-gpio.txt          |  102 +++
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   33 +
 arch/arm/boot/dts/bcm911360_entphn.dts             |   13 +
 drivers/pinctrl/bcm/Kconfig                        |   22 +
 drivers/pinctrl/bcm/Makefile                       |    1 +
 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c          |  920 ++++++++++++++++++++
 6 files changed, 1091 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c

-- 
1.7.9.5

[PATCH v7 1/4] pinctrl: Cygnus: define Broadcom Cygnus GPIO/PINCONF binding

[Ray Jui]

Document the GPIO/PINCONF device tree binding for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Scott Branden <sbranden-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
---
 .../bindings/pinctrl/brcm,cygnus-gpio.txt          |  102 ++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
new file mode 100644
index 0000000..9b9196c
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
@@ -0,0 +1,102 @@
+Broadcom Cygnus GPIO/PINCONF Controller
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-gpio"
+
+- reg:
+    Define the base and range of the I/O address space that contains the Cygnus
+GPIO/PINCONF controller registers
+
+- ngpios:
+    Total number of GPIOs the controller provides
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's pin space) and the second cell is used for the following:
+    bit[0]: polarity (0 for active high and 1 for active low)
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupts:
+    Interrupt ID
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller
+
+- pinmux:
+    Specifies the phandle to the IOMUX device, where pins can be individually
+muxed to GPIO
+
+Supported generic PINCONF properties in child nodes:
+
+- pins:
+    The list of pins (within the controller's own pin space) that properties
+in the node apply to. Pin names are "gpio-<pin>"
+
+- bias-disable:
+    Disable pin bias
+
+- bias-pull-up:
+    Enable internal pull up resistor
+
+- bias-pull-down:
+    Enable internal pull down resistor
+
+- drive-strength:
+    Valid drive strength values include 2, 4, 6, 8, 10, 12, 14, 16 (mA)
+
+Example:
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x1800a000 0x50>,
+		      <0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+
+		touch_pins: touch_pins {
+			pwr: pwr {
+				pins = "gpio-0";
+				drive-strength = <16>;
+			};
+
+			event: event {
+				pins = "gpio-1";
+				bias-pull-up;
+			};
+		};
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <146>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	/*
+	 * Touchscreen that uses the CCM GPIO 0 and 1
+	 */
+	tsc {
+		...
+		...
+		gpio-pwr = <&gpio_ccm 0 0>;
+		gpio-event = <&gpio_ccm 1 0>;
+	};
+
+	/* Bluetooth that uses the ASIU GPIO 5, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_asiu 5 1>
+	}
-- 
1.7.9.5

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[PATCH v7 2/4] pinctrl: cygnus: add gpio/pinconf driver

[Ray Jui]

This adds the initial support of the Broadcom Cygnus GPIO/PINCONF driver
that supports all 3 GPIO controllers on Cygnus including the ASIU GPIO
controller, the chipCommonG GPIO controller, and the always-on GPIO
controller. Basic PINCONF configurations such as bias pull up/down, and
drive strength are also supported in this driver.

Pins from the ASIU GPIO controller can be individually muxed to GPIO
function, through interaction with the Cygnus IOMUX controller

Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Scott Branden <sbranden-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
---
 drivers/pinctrl/bcm/Kconfig               |   22 +
 drivers/pinctrl/bcm/Makefile              |    1 +
 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c |  920 +++++++++++++++++++++++++++++
 3 files changed, 943 insertions(+)
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c

diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
index eb13201..cd11d4d 100644
--- a/drivers/pinctrl/bcm/Kconfig
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -20,6 +20,28 @@ config PINCTRL_BCM2835
 	select PINMUX
 	select PINCONF
 
+config PINCTRL_CYGNUS_GPIO
+	bool "Broadcom Cygnus GPIO (with PINCONF) driver"
+	depends on OF_GPIO && ARCH_BCM_CYGNUS
+	select GPIOLIB_IRQCHIP
+	select PINCONF
+	select GENERIC_PINCONF
+	default ARCH_BCM_CYGNUS
+	help
+	  Say yes here to enable the Broadcom Cygnus GPIO driver.
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU/AON). All 3 GPIO controllers are
+	  supported by this driver.
+
+	  All 3 Cygnus GPIO controllers support basic PINCONF functions such
+	  as bias pull up, pull down, and drive strength configurations, when
+	  these pins are muxed to GPIO.
+
+	  Pins from the ASIU GPIO can be individually muxed to GPIO function,
+	  through interaction with the Cygnus IOMUX controller.
+
 config PINCTRL_CYGNUS_MUX
 	bool "Broadcom Cygnus IOMUX driver"
 	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
index bb6beb6..2b2f70e 100644
--- a/drivers/pinctrl/bcm/Makefile
+++ b/drivers/pinctrl/bcm/Makefile
@@ -2,4 +2,5 @@
 
 obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
 obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_CYGNUS_GPIO)	+= pinctrl-cygnus-gpio.o
 obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
new file mode 100644
index 0000000..cfe4478
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
@@ -0,0 +1,920 @@
+/*
+ * Copyright (C) 2014-2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file contains the Broadcom Cygnus GPIO driver that supports 3
+ * GPIO controllers on Cygnus including the ASIU GPIO controller, the
+ * chipCommonG GPIO controller, and the always-on GPIO controller. Basic
+ * PINCONF such as bias pull up/down, and drive strength are also supported
+ * in this driver.
+ *
+ * Pins from the ASIU GPIO can be individually muxed to GPIO function,
+ * through the interaction with the Cygnus IOMUX controller
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+#include "../pinctrl-utils.h"
+
+#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
+#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
+#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
+#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
+#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
+#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
+#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
+#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
+#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
+#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
+#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
+#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
+
+/* drive strength control for ASIU GPIO */
+#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+
+/* drive strength control for CCM/CRMU (AON) GPIO */
+#define CYGNUS_GPIO_DRV0_CTRL_OFFSET  0x00
+
+#define GPIO_BANK_SIZE 0x200
+#define NGPIOS_PER_BANK 32
+#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
+
+#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
+#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
+
+#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
+#define GPIO_DRV_STRENGTH_BITS       3
+#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
+
+/*
+ * Cygnus GPIO core
+ *
+ * @dev: pointer to device
+ * @base: I/O register base for Cygnus GPIO controller
+ * @io_ctrl: I/O register base for certain type of Cygnus GPIO controller that
+ * has the PINCONF support implemented outside of the GPIO block
+ * @lock: lock to protect access to I/O registers
+ * @gc: GPIO chip
+ * @num_banks: number of GPIO banks, each bank supports up to 32 GPIOs
+ * @pinmux_is_supported: flag to indicate this GPIO controller contains pins
+ * that can be individually muxed to GPIO
+ * @pctl: pointer to pinctrl_dev
+ * @pctldesc: pinctrl descriptor
+ * @pins: pointer to array of pins
+ */
+struct cygnus_gpio {
+	struct device *dev;
+
+	void __iomem *base;
+	void __iomem *io_ctrl;
+
+	spinlock_t lock;
+
+	struct gpio_chip gc;
+	unsigned num_banks;
+
+	int pinmux_is_supported;
+
+	struct pinctrl_dev *pctl;
+	struct pinctrl_desc pctldesc;
+	struct pinctrl_pin_desc *pins;
+};
+
+static struct cygnus_gpio *to_cygnus_gpio(struct gpio_chip *gc)
+{
+	return container_of(gc, struct cygnus_gpio, gc);
+}
+
+/*
+ * Mapping from PINCONF pins to GPIO pins is 1-to-1
+ */
+static unsigned cygnus_pin_to_gpio(unsigned pin)
+{
+	return pin;
+}
+
+static u32 cygnus_readl(struct cygnus_gpio *chip, unsigned int offset)
+{
+	return readl(chip->base + offset);
+}
+
+static void cygnus_writel(struct cygnus_gpio *chip, unsigned int offset,
+			  u32 val)
+{
+	writel(val, chip->base + offset);
+}
+
+/**
+ *  cygnus_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
+ *  Cygnus GPIO register
+ *
+ *  @cygnus_gpio: Cygnus GPIO device
+ *  @reg: register offset
+ *  @gpio: GPIO pin
+ *  @set: set or clear. 1 - set; 0 -clear
+ */
+static void cygnus_set_bit(struct cygnus_gpio *chip, unsigned int reg,
+			   unsigned gpio, int set)
+{
+	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val;
+
+	val = cygnus_readl(chip, offset);
+	if (set)
+		val |= BIT(shift);
+	else
+		val &= ~BIT(shift);
+	cygnus_writel(chip, offset, val);
+}
+
+static int cygnus_get_bit(struct cygnus_gpio *chip, unsigned int reg,
+			  unsigned gpio)
+{
+	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val;
+
+	val = cygnus_readl(chip, offset) & BIT(shift);
+	if (val)
+		return 1;
+	else
+		return 0;
+}
+
+static void cygnus_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	struct irq_chip *irq_chip = irq_desc_get_chip(desc);
+	int i, bit;
+
+	chained_irq_enter(irq_chip, desc);
+
+	/* go through the entire GPIO banks and handle all interrupts */
+	for (i = 0; i < chip->num_banks; i++) {
+		unsigned long val = cygnus_readl(chip,
+				(i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_MSTAT_OFFSET);
+
+		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
+			unsigned pin = NGPIOS_PER_BANK * i + bit;
+			int child_irq = irq_find_mapping(gc->irqdomain, pin);
+
+			/*
+			 * Clear the interrupt before invoking the
+			 * handler, so we do not leave any window
+			 */
+			cygnus_writel(chip, (i * GPIO_BANK_SIZE) +
+				      CYGNUS_GPIO_INT_CLR_OFFSET, BIT(bit));
+
+			generic_handle_irq(child_irq);
+		}
+	}
+
+	chained_irq_exit(irq_chip, desc);
+}
+
+
+static void cygnus_gpio_irq_ack(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = d->hwirq;
+	unsigned int offset = CYGNUS_GPIO_REG(gpio,
+			CYGNUS_GPIO_INT_CLR_OFFSET);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val = BIT(shift);
+
+	cygnus_writel(chip, offset, val);
+}
+
+/**
+ *  cygnus_gpio_irq_set_mask - mask/unmask a GPIO interrupt
+ *
+ *  @d: IRQ chip data
+ *  @mask: mask/unmask GPIO interrupt. 0 - mask (disable); 1 - unmask (enable)
+ */
+static void cygnus_gpio_irq_set_mask(struct irq_data *d, int mask)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = d->hwirq;
+
+	cygnus_set_bit(chip, CYGNUS_GPIO_INT_MSK_OFFSET, gpio, mask);
+}
+
+static void cygnus_gpio_irq_mask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_gpio_irq_set_mask(d, 0);
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static void cygnus_gpio_irq_unmask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_gpio_irq_set_mask(d, 1);
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = d->hwirq;
+	int int_type = 0, dual_edge = 0, edge_lvl = 0;
+	unsigned long flags;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		dual_edge = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		int_type = 1;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		int_type = 1;
+		break;
+
+	default:
+		dev_err(chip->dev, "invalid GPIO IRQ type 0x%x\n",
+			type);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_set_bit(chip, CYGNUS_GPIO_IN_TYPE_OFFSET, gpio, int_type);
+	cygnus_set_bit(chip, CYGNUS_GPIO_INT_DE_OFFSET, gpio, dual_edge);
+	cygnus_set_bit(chip, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio,
+		       edge_lvl);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev,
+		"gpio:%u set int_type:%d dual_edge:%d edge_lvl:%d\n",
+		gpio, int_type, dual_edge, edge_lvl);
+
+	return 0;
+}
+
+static struct irq_chip cygnus_gpio_irq_chip = {
+	.name = "bcm-cygnus-gpio",
+	.irq_ack = cygnus_gpio_irq_ack,
+	.irq_mask = cygnus_gpio_irq_mask,
+	.irq_unmask = cygnus_gpio_irq_unmask,
+	.irq_set_type = cygnus_gpio_irq_set_type,
+};
+
+/*
+ * Request the Cygnus IOMUX pinmux controller to mux individual pins to GPIO
+ */
+static int cygnus_gpio_request(struct gpio_chip *gc, unsigned offset)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = gc->base + offset;
+
+	/* not all Cygnus GPIO pins can be muxed individually */
+	if (!chip->pinmux_is_supported)
+		return 0;
+
+	return pinctrl_request_gpio(gpio);
+}
+
+static void cygnus_gpio_free(struct gpio_chip *gc, unsigned offset)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = gc->base + offset;
+
+	if (!chip->pinmux_is_supported)
+		return;
+
+	pinctrl_free_gpio(gpio);
+}
+
+static int cygnus_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 0);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev, "gpio:%u set input\n", gpio);
+
+	return 0;
+}
+
+static int cygnus_gpio_direction_output(struct gpio_chip *gc, unsigned gpio,
+					int value)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 1);
+	cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev, "gpio:%u set output, value:%d\n", gpio, value);
+
+	return 0;
+}
+
+static void cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio, int value)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev, "gpio:%u set, value:%d\n", gpio, value);
+}
+
+static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned int offset = CYGNUS_GPIO_REG(gpio,
+					      CYGNUS_GPIO_DATA_IN_OFFSET);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+
+	return !!(cygnus_readl(chip, offset) & BIT(shift));
+}
+
+static int cygnus_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	return 1;
+}
+
+/*
+ * Only one group: "gpio_grp", since this local pinctrl device only performs
+ * GPIO specific PINCONF configurations
+ */
+static const char *cygnus_get_group_name(struct pinctrl_dev *pctldev,
+					 unsigned selector)
+{
+
+	return "gpio_grp";
+}
+
+static const struct pinctrl_ops cygnus_pctrl_ops = {
+	.get_groups_count = cygnus_get_groups_count,
+	.get_group_name = cygnus_get_group_name,
+	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int cygnus_gpio_set_pull(struct cygnus_gpio *chip, unsigned gpio,
+				int disable, int pull_up)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+
+	if (disable) {
+		cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 0);
+	} else {
+		cygnus_set_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio,
+			       pull_up);
+		cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 1);
+	}
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev, "gpio:%u set pullup:%d\n", gpio, pull_up);
+
+	return 0;
+}
+
+static void cygnus_gpio_get_pull(struct cygnus_gpio *chip, unsigned gpio,
+				 int *disable, int *pull_up)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	*disable = !cygnus_get_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio);
+	*pull_up = cygnus_get_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio);
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static int cygnus_gpio_set_strength(struct cygnus_gpio *chip, unsigned gpio,
+				    unsigned strength)
+{
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	/* make sure drive strength is supported */
+	if (strength < 2 ||  strength > 16 || (strength % 2))
+		return -ENOTSUPP;
+
+	if (chip->io_ctrl) {
+		base = chip->io_ctrl;
+		offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
+	} else {
+		base = chip->base;
+		offset = CYGNUS_GPIO_REG(gpio,
+					 CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
+	}
+
+	shift = CYGNUS_GPIO_SHIFT(gpio);
+
+	dev_dbg(chip->dev, "gpio:%u set drive strength:%d mA\n", gpio,
+		strength);
+
+	spin_lock_irqsave(&chip->lock, flags);
+	strength = (strength / 2) - 1;
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset);
+		val &= ~BIT(shift);
+		val |= ((strength >> i) & 0x1) << shift;
+		writel(val, base + offset);
+		offset += 4;
+	}
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return 0;
+}
+
+static int cygnus_gpio_get_strength(struct cygnus_gpio *chip, unsigned gpio,
+				    u16 *strength)
+{
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	if (chip->io_ctrl) {
+		base = chip->io_ctrl;
+		offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
+	} else {
+		base = chip->base;
+		offset = CYGNUS_GPIO_REG(gpio,
+					 CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
+	}
+
+	shift = CYGNUS_GPIO_SHIFT(gpio);
+
+	spin_lock_irqsave(&chip->lock, flags);
+	*strength = 0;
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset) & BIT(shift);
+		val >>= shift;
+		*strength += (val << i);
+		offset += 4;
+	}
+
+	/* convert to mA */
+	*strength = (*strength + 1) * 2;
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return 0;
+}
+
+static int cygnus_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
+				 unsigned long *config)
+{
+	struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
+	enum pin_config_param param = pinconf_to_config_param(*config);
+	unsigned gpio = cygnus_pin_to_gpio(pin);
+	u16 arg;
+	int disable, pull_up, ret;
+
+	switch (param) {
+	case PIN_CONFIG_BIAS_DISABLE:
+		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+		if (disable)
+			return 0;
+		else
+			return -EINVAL;
+
+	case PIN_CONFIG_BIAS_PULL_UP:
+		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+		if (!disable && pull_up)
+			return 0;
+		else
+			return -EINVAL;
+
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+		if (!disable && !pull_up)
+			return 0;
+		else
+			return -EINVAL;
+
+	case PIN_CONFIG_DRIVE_STRENGTH:
+		ret = cygnus_gpio_get_strength(chip, gpio, &arg);
+		if (ret)
+			return ret;
+		else
+			*config = pinconf_to_config_packed(param, arg);
+
+		return 0;
+
+	default:
+		return -ENOTSUPP;
+	}
+
+	return -ENOTSUPP;
+}
+
+static int cygnus_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
+				 unsigned long *configs, unsigned num_configs)
+{
+	struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
+	enum pin_config_param param;
+	u16 arg;
+	unsigned i, gpio = cygnus_pin_to_gpio(pin);
+	int ret = -ENOTSUPP;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_BIAS_DISABLE:
+			ret = cygnus_gpio_set_pull(chip, gpio, 1, 0);
+			if (ret < 0)
+				goto out;
+			break;
+
+		case PIN_CONFIG_BIAS_PULL_UP:
+			ret = cygnus_gpio_set_pull(chip, gpio, 0, 1);
+			if (ret < 0)
+				goto out;
+			break;
+
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			ret = cygnus_gpio_set_pull(chip, gpio, 0, 0);
+			if (ret < 0)
+				goto out;
+			break;
+
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			ret = cygnus_gpio_set_strength(chip, gpio, arg);
+			if (ret < 0)
+				goto out;
+			break;
+
+		default:
+			dev_err(chip->dev, "invalid configuration\n");
+			return -ENOTSUPP;
+		}
+	} /* for each config */
+
+out:
+	return ret;
+}
+
+static const struct pinconf_ops cygnus_pconf_ops = {
+	.is_generic = true,
+	.pin_config_get = cygnus_pin_config_get,
+	.pin_config_set = cygnus_pin_config_set,
+};
+
+/*
+ * Map a GPIO in the local gpio_chip pin space to a pin in the Cygnus IOMUX
+ * pinctrl pin space
+ */
+struct cygnus_gpio_pin_range {
+	unsigned offset;
+	unsigned pin_base;
+	unsigned num_pins;
+};
+
+#define CYGNUS_PINRANGE(o, p, n) { .offset = o, .pin_base = p, .num_pins = n }
+
+/*
+ * Pin mapping table for mapping local GPIO pins to Cygnus IOMUX pinctrl pins
+ */
+static const struct cygnus_gpio_pin_range cygnus_gpio_pintable[] = {
+	CYGNUS_PINRANGE(0, 42, 1),
+	CYGNUS_PINRANGE(1, 44, 3),
+	CYGNUS_PINRANGE(4, 48, 1),
+	CYGNUS_PINRANGE(5, 50, 3),
+	CYGNUS_PINRANGE(8, 126, 1),
+	CYGNUS_PINRANGE(9, 155, 1),
+	CYGNUS_PINRANGE(10, 152, 1),
+	CYGNUS_PINRANGE(11, 154, 1),
+	CYGNUS_PINRANGE(12, 153, 1),
+	CYGNUS_PINRANGE(13, 127, 3),
+	CYGNUS_PINRANGE(16, 140, 1),
+	CYGNUS_PINRANGE(17, 145, 7),
+	CYGNUS_PINRANGE(24, 130, 10),
+	CYGNUS_PINRANGE(34, 141, 4),
+	CYGNUS_PINRANGE(38, 54, 1),
+	CYGNUS_PINRANGE(39, 56, 3),
+	CYGNUS_PINRANGE(42, 60, 3),
+	CYGNUS_PINRANGE(45, 64, 3),
+	CYGNUS_PINRANGE(48, 68, 2),
+	CYGNUS_PINRANGE(50, 84, 6),
+	CYGNUS_PINRANGE(56, 94, 6),
+	CYGNUS_PINRANGE(62, 72, 1),
+	CYGNUS_PINRANGE(63, 70, 1),
+	CYGNUS_PINRANGE(64, 80, 1),
+	CYGNUS_PINRANGE(65, 74, 3),
+	CYGNUS_PINRANGE(68, 78, 1),
+	CYGNUS_PINRANGE(69, 82, 1),
+	CYGNUS_PINRANGE(70, 156, 17),
+	CYGNUS_PINRANGE(87, 104, 12),
+	CYGNUS_PINRANGE(99, 102, 2),
+	CYGNUS_PINRANGE(101, 90, 4),
+	CYGNUS_PINRANGE(105, 116, 10),
+	CYGNUS_PINRANGE(123, 11, 1),
+	CYGNUS_PINRANGE(124, 38, 4),
+	CYGNUS_PINRANGE(128, 43, 1),
+	CYGNUS_PINRANGE(129, 47, 1),
+	CYGNUS_PINRANGE(130, 49, 1),
+	CYGNUS_PINRANGE(131, 53, 1),
+	CYGNUS_PINRANGE(132, 55, 1),
+	CYGNUS_PINRANGE(133, 59, 1),
+	CYGNUS_PINRANGE(134, 63, 1),
+	CYGNUS_PINRANGE(135, 67, 1),
+	CYGNUS_PINRANGE(136, 71, 1),
+	CYGNUS_PINRANGE(137, 73, 1),
+	CYGNUS_PINRANGE(138, 77, 1),
+	CYGNUS_PINRANGE(139, 79, 1),
+	CYGNUS_PINRANGE(140, 81, 1),
+	CYGNUS_PINRANGE(141, 83, 1),
+	CYGNUS_PINRANGE(142, 10, 1)
+};
+
+/*
+ * The Cygnus IOMUX controller mainly supports group based mux configuration,
+ * but certain pins can be muxed to GPIO individually. Only the ASIU GPIO
+ * controller can support this, so it's an optional configuration
+ *
+ * Return -ENODEV means no support and that's fine
+ */
+static int cygnus_gpio_pinmux_add_range(struct cygnus_gpio *chip)
+{
+	struct device_node *node = chip->dev->of_node;
+	struct device_node *pinmux_node;
+	struct platform_device *pinmux_pdev;
+	struct gpio_chip *gc = &chip->gc;
+	int i, ret;
+
+	/* parse DT to find the phandle to the pinmux controller */
+	pinmux_node = of_parse_phandle(node, "pinmux", 0);
+	if (!pinmux_node)
+		return -ENODEV;
+
+	pinmux_pdev = of_find_device_by_node(pinmux_node);
+	if (!pinmux_pdev) {
+		dev_err(chip->dev, "failed to get pinmux device\n");
+		return -EINVAL;
+	}
+
+	/* now need to create the mapping between local GPIO and PINMUX pins */
+	for (i = 0; i < ARRAY_SIZE(cygnus_gpio_pintable); i++) {
+		ret = gpiochip_add_pin_range(gc, dev_name(&pinmux_pdev->dev),
+					     cygnus_gpio_pintable[i].offset,
+					     cygnus_gpio_pintable[i].pin_base,
+					     cygnus_gpio_pintable[i].num_pins);
+		if (ret) {
+			dev_err(chip->dev, "unable to add GPIO pin range\n");
+			goto err_rm_pin_range;
+		}
+	}
+
+	chip->pinmux_is_supported = 1;
+	return 0;
+
+err_rm_pin_range:
+	gpiochip_remove_pin_ranges(gc);
+	return ret;
+}
+
+static void cygnus_gpio_pinmux_remove_range(struct cygnus_gpio *chip)
+{
+	struct gpio_chip *gc = &chip->gc;
+
+	if (chip->pinmux_is_supported)
+		gpiochip_remove_pin_ranges(gc);
+}
+
+/*
+ * Cygnus GPIO controller supports some PINCONF related configurations such as
+ * pull up, pull down, and drive strength, when the pin is configured to GPIO
+ *
+ * Here a local pinctrl device is created with simple 1-to-1 pin mapping to the
+ * local GPIO pins
+ */
+static int cygnus_gpio_register_pinconf(struct cygnus_gpio *chip)
+{
+	struct pinctrl_desc *pctldesc = &chip->pctldesc;
+	struct pinctrl_pin_desc *pins;
+	struct gpio_chip *gc = &chip->gc;
+	int i, ret;
+
+	pins = devm_kcalloc(chip->dev, gc->ngpio, sizeof(*pins), GFP_KERNEL);
+	if (!pins)
+		return -ENOMEM;
+	chip->pins = pins;
+
+	for (i = 0; i < gc->ngpio; i++) {
+		pins[i].number = i;
+		pins[i].name = kasprintf(GFP_KERNEL, "gpio-%d", i);
+		if (!pins[i].name) {
+			ret = -ENOMEM;
+			goto err_kfree;
+		}
+	}
+
+	pctldesc->name = dev_name(chip->dev);
+	pctldesc->pctlops = &cygnus_pctrl_ops;
+	pctldesc->pins = pins;
+	pctldesc->npins = gc->ngpio;
+	pctldesc->confops = &cygnus_pconf_ops;
+
+	chip->pctl = pinctrl_register(pctldesc, chip->dev, chip);
+	if (!chip->pctl) {
+		dev_err(chip->dev, "unable to register pinctrl device\n");
+		ret = -EINVAL;
+		goto err_kfree;
+	}
+
+	return 0;
+
+err_kfree:
+	for (i = 0; i < gc->ngpio; i++)
+		kfree(pins[i].name);
+
+	return ret;
+}
+
+static void cygnus_gpio_unregister_pinconf(struct cygnus_gpio *chip)
+{
+	struct gpio_chip *gc = &chip->gc;
+	int i;
+
+	if (chip->pctl)
+		pinctrl_unregister(chip->pctl);
+
+	for (i = 0; i < gc->ngpio; i++)
+		kfree(chip->pins[i].name);
+}
+
+static const struct of_device_id cygnus_gpio_of_match[] = {
+	{ .compatible = "brcm,cygnus-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cygnus_gpio_of_match);
+
+static int cygnus_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct cygnus_gpio *chip;
+	struct gpio_chip *gc;
+	u32 ngpios;
+	int irq, ret;
+
+	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->dev = dev;
+	platform_set_drvdata(pdev, chip);
+
+	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+		dev_err(dev, "missing ngpios DT property\n");
+		return -ENODEV;
+	}
+	chip->num_banks = (ngpios + NGPIOS_PER_BANK - 1) / NGPIOS_PER_BANK;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	chip->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(chip->base)) {
+		dev_err(dev, "unable to map I/O memory\n");
+		return PTR_ERR(chip->base);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		chip->io_ctrl = devm_ioremap_resource(dev, res);
+		if (IS_ERR(chip->io_ctrl)) {
+			dev_err(dev, "unable to map I/O memory\n");
+			return PTR_ERR(chip->io_ctrl);
+		}
+	}
+
+	spin_lock_init(&chip->lock);
+
+	gc = &chip->gc;
+	gc->base = -1;
+	gc->ngpio = ngpios;
+	gc->label = dev_name(dev);
+	gc->dev = dev;
+	gc->of_node = dev->of_node;
+	gc->request = cygnus_gpio_request;
+	gc->free = cygnus_gpio_free;
+	gc->direction_input = cygnus_gpio_direction_input;
+	gc->direction_output = cygnus_gpio_direction_output;
+	gc->set = cygnus_gpio_set;
+	gc->get = cygnus_gpio_get;
+
+	ret = gpiochip_add(gc);
+	if (ret < 0) {
+		dev_err(dev, "unable to add GPIO chip\n");
+		return ret;
+	}
+
+	ret = cygnus_gpio_pinmux_add_range(chip);
+	if (ret && ret != -ENODEV) {
+		dev_err(dev, "unable to add GPIO pin range\n");
+		goto err_rm_gpiochip;
+	}
+
+	ret = cygnus_gpio_register_pinconf(chip);
+	if (ret) {
+		dev_err(dev, "unable to register pinconf\n");
+		goto err_rm_range;
+	}
+
+	/* optional GPIO interrupt support */
+	irq = platform_get_irq(pdev, 0);
+	if (irq) {
+		ret = gpiochip_irqchip_add(gc, &cygnus_gpio_irq_chip, 0,
+					   handle_simple_irq, IRQ_TYPE_NONE);
+		if (ret) {
+			dev_err(dev, "no GPIO irqchip\n");
+			goto err_unregister_pinconf;
+		}
+
+		gpiochip_set_chained_irqchip(gc, &cygnus_gpio_irq_chip, irq,
+					     cygnus_gpio_irq_handler);
+	}
+
+	return 0;
+
+err_unregister_pinconf:
+	cygnus_gpio_unregister_pinconf(chip);
+
+err_rm_range:
+	cygnus_gpio_pinmux_remove_range(chip);
+
+err_rm_gpiochip:
+	gpiochip_remove(gc);
+
+	return ret;
+}
+
+static struct platform_driver cygnus_gpio_driver = {
+	.driver = {
+		.name = "cygnus-gpio",
+		.of_match_table = cygnus_gpio_of_match,
+	},
+	.probe = cygnus_gpio_probe,
+};
+
+static int __init cygnus_gpio_init(void)
+{
+	return platform_driver_probe(&cygnus_gpio_driver, cygnus_gpio_probe);
+}
+arch_initcall_sync(cygnus_gpio_init);
+
+MODULE_AUTHOR("Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>");
+MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

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Re: [PATCH v7 2/4] pinctrl: cygnus: add gpio/pinconf driver

[Dmitry Torokhov]

On Tue, Feb 03, 2015 at 05:09:06PM -0800, Ray Jui wrote:
> This adds the initial support of the Broadcom Cygnus GPIO/PINCONF driver
> that supports all 3 GPIO controllers on Cygnus including the ASIU GPIO
> controller, the chipCommonG GPIO controller, and the always-on GPIO
> controller. Basic PINCONF configurations such as bias pull up/down, and
> drive strength are also supported in this driver.
> 
> Pins from the ASIU GPIO controller can be individually muxed to GPIO
> function, through interaction with the Cygnus IOMUX controller
> 
> Signed-off-by: Ray Jui <rjui@broadcom.com>
> Reviewed-by: Scott Branden <sbranden@broadcom.com>
> ---
>  drivers/pinctrl/bcm/Kconfig               |   22 +
>  drivers/pinctrl/bcm/Makefile              |    1 +
>  drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c |  920 +++++++++++++++++++++++++++++
>  3 files changed, 943 insertions(+)
>  create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
> 
> diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
> index eb13201..cd11d4d 100644
> --- a/drivers/pinctrl/bcm/Kconfig
> +++ b/drivers/pinctrl/bcm/Kconfig
> @@ -20,6 +20,28 @@ config PINCTRL_BCM2835
>  	select PINMUX
>  	select PINCONF
>  
> +config PINCTRL_CYGNUS_GPIO
> +	bool "Broadcom Cygnus GPIO (with PINCONF) driver"
> +	depends on OF_GPIO && ARCH_BCM_CYGNUS
> +	select GPIOLIB_IRQCHIP
> +	select PINCONF
> +	select GENERIC_PINCONF
> +	default ARCH_BCM_CYGNUS
> +	help
> +	  Say yes here to enable the Broadcom Cygnus GPIO driver.
> +
> +	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
> +	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
> +	  the always-ON GPIO controller (CRMU/AON). All 3 GPIO controllers are
> +	  supported by this driver.
> +
> +	  All 3 Cygnus GPIO controllers support basic PINCONF functions such
> +	  as bias pull up, pull down, and drive strength configurations, when
> +	  these pins are muxed to GPIO.
> +
> +	  Pins from the ASIU GPIO can be individually muxed to GPIO function,
> +	  through interaction with the Cygnus IOMUX controller.
> +
>  config PINCTRL_CYGNUS_MUX
>  	bool "Broadcom Cygnus IOMUX driver"
>  	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
> diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
> index bb6beb6..2b2f70e 100644
> --- a/drivers/pinctrl/bcm/Makefile
> +++ b/drivers/pinctrl/bcm/Makefile
> @@ -2,4 +2,5 @@
>  
>  obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
>  obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
> +obj-$(CONFIG_PINCTRL_CYGNUS_GPIO)	+= pinctrl-cygnus-gpio.o
>  obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
> diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
> new file mode 100644
> index 0000000..cfe4478
> --- /dev/null
> +++ b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
> @@ -0,0 +1,920 @@
> +/*
> + * Copyright (C) 2014-2015 Broadcom Corporation
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * This file contains the Broadcom Cygnus GPIO driver that supports 3
> + * GPIO controllers on Cygnus including the ASIU GPIO controller, the
> + * chipCommonG GPIO controller, and the always-on GPIO controller. Basic
> + * PINCONF such as bias pull up/down, and drive strength are also supported
> + * in this driver.
> + *
> + * Pins from the ASIU GPIO can be individually muxed to GPIO function,
> + * through the interaction with the Cygnus IOMUX controller
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +#include <linux/module.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/gpio.h>
> +#include <linux/ioport.h>
> +#include <linux/of_device.h>
> +#include <linux/of_irq.h>
> +#include <linux/pinctrl/pinctrl.h>
> +#include <linux/pinctrl/pinmux.h>
> +#include <linux/pinctrl/pinconf.h>
> +#include <linux/pinctrl/pinconf-generic.h>
> +
> +#include "../pinctrl-utils.h"
> +
> +#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
> +#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
> +#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
> +#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
> +#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
> +#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
> +#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
> +#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
> +#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
> +#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
> +#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
> +#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
> +
> +/* drive strength control for ASIU GPIO */
> +#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
> +
> +/* drive strength control for CCM/CRMU (AON) GPIO */
> +#define CYGNUS_GPIO_DRV0_CTRL_OFFSET  0x00
> +
> +#define GPIO_BANK_SIZE 0x200
> +#define NGPIOS_PER_BANK 32
> +#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
> +
> +#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
> +#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
> +
> +#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
> +#define GPIO_DRV_STRENGTH_BITS       3
> +#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
> +
> +/*
> + * Cygnus GPIO core
> + *
> + * @dev: pointer to device
> + * @base: I/O register base for Cygnus GPIO controller
> + * @io_ctrl: I/O register base for certain type of Cygnus GPIO controller that
> + * has the PINCONF support implemented outside of the GPIO block
> + * @lock: lock to protect access to I/O registers
> + * @gc: GPIO chip
> + * @num_banks: number of GPIO banks, each bank supports up to 32 GPIOs
> + * @pinmux_is_supported: flag to indicate this GPIO controller contains pins
> + * that can be individually muxed to GPIO
> + * @pctl: pointer to pinctrl_dev
> + * @pctldesc: pinctrl descriptor
> + * @pins: pointer to array of pins
> + */
> +struct cygnus_gpio {
> +	struct device *dev;
> +
> +	void __iomem *base;
> +	void __iomem *io_ctrl;
> +
> +	spinlock_t lock;
> +
> +	struct gpio_chip gc;
> +	unsigned num_banks;
> +
> +	int pinmux_is_supported;

bool?

> +
> +	struct pinctrl_dev *pctl;
> +	struct pinctrl_desc pctldesc;
> +	struct pinctrl_pin_desc *pins;
> +};
> +
> +static struct cygnus_gpio *to_cygnus_gpio(struct gpio_chip *gc)
> +{
> +	return container_of(gc, struct cygnus_gpio, gc);
> +}
> +
> +/*
> + * Mapping from PINCONF pins to GPIO pins is 1-to-1
> + */
> +static unsigned cygnus_pin_to_gpio(unsigned pin)
> +{
> +	return pin;
> +}
> +
> +static u32 cygnus_readl(struct cygnus_gpio *chip, unsigned int offset)
> +{
> +	return readl(chip->base + offset);
> +}
> +
> +static void cygnus_writel(struct cygnus_gpio *chip, unsigned int offset,
> +			  u32 val)
> +{
> +	writel(val, chip->base + offset);
> +}
> +
> +/**
> + *  cygnus_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
> + *  Cygnus GPIO register
> + *
> + *  @cygnus_gpio: Cygnus GPIO device
> + *  @reg: register offset
> + *  @gpio: GPIO pin
> + *  @set: set or clear. 1 - set; 0 -clear
> + */
> +static void cygnus_set_bit(struct cygnus_gpio *chip, unsigned int reg,
> +			   unsigned gpio, int set)
> +{
> +	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
> +	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
> +	u32 val;
> +
> +	val = cygnus_readl(chip, offset);
> +	if (set)
> +		val |= BIT(shift);
> +	else
> +		val &= ~BIT(shift);
> +	cygnus_writel(chip, offset, val);
> +}
> +
> +static int cygnus_get_bit(struct cygnus_gpio *chip, unsigned int reg,
> +			  unsigned gpio)
> +{
> +	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
> +	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
> +	u32 val;
> +
> +	val = cygnus_readl(chip, offset) & BIT(shift);
> +	if (val)
> +		return 1;
> +	else
> +		return 0;
> +}
> +
> +static void cygnus_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
> +{
> +	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	struct irq_chip *irq_chip = irq_desc_get_chip(desc);
> +	int i, bit;
> +
> +	chained_irq_enter(irq_chip, desc);
> +
> +	/* go through the entire GPIO banks and handle all interrupts */
> +	for (i = 0; i < chip->num_banks; i++) {
> +		unsigned long val = cygnus_readl(chip,
> +				(i * GPIO_BANK_SIZE) +
> +				CYGNUS_GPIO_INT_MSTAT_OFFSET);
> +
> +		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
> +			unsigned pin = NGPIOS_PER_BANK * i + bit;
> +			int child_irq = irq_find_mapping(gc->irqdomain, pin);
> +
> +			/*
> +			 * Clear the interrupt before invoking the
> +			 * handler, so we do not leave any window
> +			 */
> +			cygnus_writel(chip, (i * GPIO_BANK_SIZE) +
> +				      CYGNUS_GPIO_INT_CLR_OFFSET, BIT(bit));
> +
> +			generic_handle_irq(child_irq);
> +		}
> +	}
> +
> +	chained_irq_exit(irq_chip, desc);
> +}
> +
> +
> +static void cygnus_gpio_irq_ack(struct irq_data *d)
> +{
> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned gpio = d->hwirq;
> +	unsigned int offset = CYGNUS_GPIO_REG(gpio,
> +			CYGNUS_GPIO_INT_CLR_OFFSET);
> +	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
> +	u32 val = BIT(shift);
> +
> +	cygnus_writel(chip, offset, val);
> +}
> +
> +/**
> + *  cygnus_gpio_irq_set_mask - mask/unmask a GPIO interrupt
> + *
> + *  @d: IRQ chip data
> + *  @mask: mask/unmask GPIO interrupt. 0 - mask (disable); 1 - unmask (enable)
> + */
> +static void cygnus_gpio_irq_set_mask(struct irq_data *d, int mask)
> +{
> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned gpio = d->hwirq;
> +
> +	cygnus_set_bit(chip, CYGNUS_GPIO_INT_MSK_OFFSET, gpio, mask);
> +}
> +
> +static void cygnus_gpio_irq_mask(struct irq_data *d)
> +{
> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	cygnus_gpio_irq_set_mask(d, 0);
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +}
> +
> +static void cygnus_gpio_irq_unmask(struct irq_data *d)
> +{
> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	cygnus_gpio_irq_set_mask(d, 1);
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +}
> +
> +static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
> +{
> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned gpio = d->hwirq;
> +	int int_type = 0, dual_edge = 0, edge_lvl = 0;
> +	unsigned long flags;
> +
> +	switch (type & IRQ_TYPE_SENSE_MASK) {
> +	case IRQ_TYPE_EDGE_RISING:
> +		edge_lvl = 1;
> +		break;
> +
> +	case IRQ_TYPE_EDGE_FALLING:
> +		break;
> +
> +	case IRQ_TYPE_EDGE_BOTH:
> +		dual_edge = 1;
> +		break;
> +
> +	case IRQ_TYPE_LEVEL_HIGH:
> +		int_type = 1;
> +		edge_lvl = 1;
> +		break;
> +
> +	case IRQ_TYPE_LEVEL_LOW:
> +		int_type = 1;
> +		break;
> +
> +	default:
> +		dev_err(chip->dev, "invalid GPIO IRQ type 0x%x\n",
> +			type);
> +		return -EINVAL;
> +	}
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	cygnus_set_bit(chip, CYGNUS_GPIO_IN_TYPE_OFFSET, gpio, int_type);
> +	cygnus_set_bit(chip, CYGNUS_GPIO_INT_DE_OFFSET, gpio, dual_edge);
> +	cygnus_set_bit(chip, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio,
> +		       edge_lvl);
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +
> +	dev_dbg(chip->dev,
> +		"gpio:%u set int_type:%d dual_edge:%d edge_lvl:%d\n",
> +		gpio, int_type, dual_edge, edge_lvl);
> +
> +	return 0;
> +}
> +
> +static struct irq_chip cygnus_gpio_irq_chip = {
> +	.name = "bcm-cygnus-gpio",
> +	.irq_ack = cygnus_gpio_irq_ack,
> +	.irq_mask = cygnus_gpio_irq_mask,
> +	.irq_unmask = cygnus_gpio_irq_unmask,
> +	.irq_set_type = cygnus_gpio_irq_set_type,
> +};
> +
> +/*
> + * Request the Cygnus IOMUX pinmux controller to mux individual pins to GPIO
> + */
> +static int cygnus_gpio_request(struct gpio_chip *gc, unsigned offset)
> +{
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned gpio = gc->base + offset;
> +
> +	/* not all Cygnus GPIO pins can be muxed individually */
> +	if (!chip->pinmux_is_supported)
> +		return 0;
> +
> +	return pinctrl_request_gpio(gpio);
> +}
> +
> +static void cygnus_gpio_free(struct gpio_chip *gc, unsigned offset)
> +{
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned gpio = gc->base + offset;
> +
> +	if (!chip->pinmux_is_supported)
> +		return;
> +
> +	pinctrl_free_gpio(gpio);
> +}
> +
> +static int cygnus_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
> +{
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 0);
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +
> +	dev_dbg(chip->dev, "gpio:%u set input\n", gpio);
> +
> +	return 0;
> +}
> +
> +static int cygnus_gpio_direction_output(struct gpio_chip *gc, unsigned gpio,
> +					int value)
> +{
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 1);
> +	cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +
> +	dev_dbg(chip->dev, "gpio:%u set output, value:%d\n", gpio, value);
> +
> +	return 0;
> +}
> +
> +static void cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio, int value)
> +{
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +
> +	dev_dbg(chip->dev, "gpio:%u set, value:%d\n", gpio, value);
> +}
> +
> +static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
> +{
> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
> +	unsigned int offset = CYGNUS_GPIO_REG(gpio,
> +					      CYGNUS_GPIO_DATA_IN_OFFSET);
> +	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
> +
> +	return !!(cygnus_readl(chip, offset) & BIT(shift));
> +}
> +
> +static int cygnus_get_groups_count(struct pinctrl_dev *pctldev)
> +{
> +	return 1;
> +}
> +
> +/*
> + * Only one group: "gpio_grp", since this local pinctrl device only performs
> + * GPIO specific PINCONF configurations
> + */
> +static const char *cygnus_get_group_name(struct pinctrl_dev *pctldev,
> +					 unsigned selector)
> +{
> +

Extra blank line.

> +	return "gpio_grp";
> +}
> +
> +static const struct pinctrl_ops cygnus_pctrl_ops = {
> +	.get_groups_count = cygnus_get_groups_count,
> +	.get_group_name = cygnus_get_group_name,
> +	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
> +	.dt_free_map = pinctrl_utils_dt_free_map,
> +};
> +
> +static int cygnus_gpio_set_pull(struct cygnus_gpio *chip, unsigned gpio,
> +				int disable, int pull_up)
> +{
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +
> +	if (disable) {
> +		cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 0);
> +	} else {
> +		cygnus_set_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio,
> +			       pull_up);
> +		cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 1);
> +	}
> +
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +
> +	dev_dbg(chip->dev, "gpio:%u set pullup:%d\n", gpio, pull_up);
> +
> +	return 0;
> +}
> +
> +static void cygnus_gpio_get_pull(struct cygnus_gpio *chip, unsigned gpio,
> +				 int *disable, int *pull_up)
> +{
> +	unsigned long flags;
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	*disable = !cygnus_get_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio);
> +	*pull_up = cygnus_get_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio);
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +}
> +
> +static int cygnus_gpio_set_strength(struct cygnus_gpio *chip, unsigned gpio,
> +				    unsigned strength)
> +{
> +	void __iomem *base;
> +	unsigned int i, offset, shift;
> +	u32 val;
> +	unsigned long flags;
> +
> +	/* make sure drive strength is supported */
> +	if (strength < 2 ||  strength > 16 || (strength % 2))
> +		return -ENOTSUPP;
> +
> +	if (chip->io_ctrl) {
> +		base = chip->io_ctrl;
> +		offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
> +	} else {
> +		base = chip->base;
> +		offset = CYGNUS_GPIO_REG(gpio,
> +					 CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
> +	}
> +
> +	shift = CYGNUS_GPIO_SHIFT(gpio);
> +
> +	dev_dbg(chip->dev, "gpio:%u set drive strength:%d mA\n", gpio,
> +		strength);
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	strength = (strength / 2) - 1;
> +	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
> +		val = readl(base + offset);
> +		val &= ~BIT(shift);
> +		val |= ((strength >> i) & 0x1) << shift;
> +		writel(val, base + offset);
> +		offset += 4;
> +	}
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +
> +	return 0;
> +}
> +
> +static int cygnus_gpio_get_strength(struct cygnus_gpio *chip, unsigned gpio,
> +				    u16 *strength)
> +{
> +	void __iomem *base;
> +	unsigned int i, offset, shift;
> +	u32 val;
> +	unsigned long flags;
> +
> +	if (chip->io_ctrl) {
> +		base = chip->io_ctrl;
> +		offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
> +	} else {
> +		base = chip->base;
> +		offset = CYGNUS_GPIO_REG(gpio,
> +					 CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
> +	}
> +
> +	shift = CYGNUS_GPIO_SHIFT(gpio);
> +
> +	spin_lock_irqsave(&chip->lock, flags);
> +	*strength = 0;
> +	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
> +		val = readl(base + offset) & BIT(shift);
> +		val >>= shift;
> +		*strength += (val << i);
> +		offset += 4;
> +	}
> +
> +	/* convert to mA */
> +	*strength = (*strength + 1) * 2;
> +	spin_unlock_irqrestore(&chip->lock, flags);
> +
> +	return 0;
> +}
> +
> +static int cygnus_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
> +				 unsigned long *config)
> +{
> +	struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
> +	enum pin_config_param param = pinconf_to_config_param(*config);
> +	unsigned gpio = cygnus_pin_to_gpio(pin);
> +	u16 arg;
> +	int disable, pull_up, ret;
> +
> +	switch (param) {
> +	case PIN_CONFIG_BIAS_DISABLE:
> +		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
> +		if (disable)
> +			return 0;
> +		else
> +			return -EINVAL;
> +
> +	case PIN_CONFIG_BIAS_PULL_UP:
> +		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
> +		if (!disable && pull_up)
> +			return 0;
> +		else
> +			return -EINVAL;
> +
> +	case PIN_CONFIG_BIAS_PULL_DOWN:
> +		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
> +		if (!disable && !pull_up)
> +			return 0;
> +		else
> +			return -EINVAL;
> +
> +	case PIN_CONFIG_DRIVE_STRENGTH:
> +		ret = cygnus_gpio_get_strength(chip, gpio, &arg);
> +		if (ret)
> +			return ret;
> +		else
> +			*config = pinconf_to_config_packed(param, arg);
> +
> +		return 0;
> +
> +	default:
> +		return -ENOTSUPP;
> +	}
> +
> +	return -ENOTSUPP;
> +}
> +
> +static int cygnus_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
> +				 unsigned long *configs, unsigned num_configs)
> +{
> +	struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
> +	enum pin_config_param param;
> +	u16 arg;
> +	unsigned i, gpio = cygnus_pin_to_gpio(pin);
> +	int ret = -ENOTSUPP;
> +
> +	for (i = 0; i < num_configs; i++) {
> +		param = pinconf_to_config_param(configs[i]);
> +		arg = pinconf_to_config_argument(configs[i]);
> +
> +		switch (param) {
> +		case PIN_CONFIG_BIAS_DISABLE:
> +			ret = cygnus_gpio_set_pull(chip, gpio, 1, 0);
> +			if (ret < 0)
> +				goto out;
> +			break;
> +
> +		case PIN_CONFIG_BIAS_PULL_UP:
> +			ret = cygnus_gpio_set_pull(chip, gpio, 0, 1);
> +			if (ret < 0)
> +				goto out;
> +			break;
> +
> +		case PIN_CONFIG_BIAS_PULL_DOWN:
> +			ret = cygnus_gpio_set_pull(chip, gpio, 0, 0);
> +			if (ret < 0)
> +				goto out;
> +			break;
> +
> +		case PIN_CONFIG_DRIVE_STRENGTH:
> +			ret = cygnus_gpio_set_strength(chip, gpio, arg);
> +			if (ret < 0)
> +				goto out;
> +			break;
> +
> +		default:
> +			dev_err(chip->dev, "invalid configuration\n");
> +			return -ENOTSUPP;
> +		}
> +	} /* for each config */
> +
> +out:
> +	return ret;
> +}
> +
> +static const struct pinconf_ops cygnus_pconf_ops = {
> +	.is_generic = true,
> +	.pin_config_get = cygnus_pin_config_get,
> +	.pin_config_set = cygnus_pin_config_set,
> +};
> +
> +/*
> + * Map a GPIO in the local gpio_chip pin space to a pin in the Cygnus IOMUX
> + * pinctrl pin space
> + */
> +struct cygnus_gpio_pin_range {
> +	unsigned offset;
> +	unsigned pin_base;
> +	unsigned num_pins;
> +};
> +
> +#define CYGNUS_PINRANGE(o, p, n) { .offset = o, .pin_base = p, .num_pins = n }
> +
> +/*
> + * Pin mapping table for mapping local GPIO pins to Cygnus IOMUX pinctrl pins
> + */
> +static const struct cygnus_gpio_pin_range cygnus_gpio_pintable[] = {
> +	CYGNUS_PINRANGE(0, 42, 1),
> +	CYGNUS_PINRANGE(1, 44, 3),
> +	CYGNUS_PINRANGE(4, 48, 1),
> +	CYGNUS_PINRANGE(5, 50, 3),
> +	CYGNUS_PINRANGE(8, 126, 1),
> +	CYGNUS_PINRANGE(9, 155, 1),
> +	CYGNUS_PINRANGE(10, 152, 1),
> +	CYGNUS_PINRANGE(11, 154, 1),
> +	CYGNUS_PINRANGE(12, 153, 1),
> +	CYGNUS_PINRANGE(13, 127, 3),
> +	CYGNUS_PINRANGE(16, 140, 1),
> +	CYGNUS_PINRANGE(17, 145, 7),
> +	CYGNUS_PINRANGE(24, 130, 10),
> +	CYGNUS_PINRANGE(34, 141, 4),
> +	CYGNUS_PINRANGE(38, 54, 1),
> +	CYGNUS_PINRANGE(39, 56, 3),
> +	CYGNUS_PINRANGE(42, 60, 3),
> +	CYGNUS_PINRANGE(45, 64, 3),
> +	CYGNUS_PINRANGE(48, 68, 2),
> +	CYGNUS_PINRANGE(50, 84, 6),
> +	CYGNUS_PINRANGE(56, 94, 6),
> +	CYGNUS_PINRANGE(62, 72, 1),
> +	CYGNUS_PINRANGE(63, 70, 1),
> +	CYGNUS_PINRANGE(64, 80, 1),
> +	CYGNUS_PINRANGE(65, 74, 3),
> +	CYGNUS_PINRANGE(68, 78, 1),
> +	CYGNUS_PINRANGE(69, 82, 1),
> +	CYGNUS_PINRANGE(70, 156, 17),
> +	CYGNUS_PINRANGE(87, 104, 12),
> +	CYGNUS_PINRANGE(99, 102, 2),
> +	CYGNUS_PINRANGE(101, 90, 4),
> +	CYGNUS_PINRANGE(105, 116, 10),
> +	CYGNUS_PINRANGE(123, 11, 1),
> +	CYGNUS_PINRANGE(124, 38, 4),
> +	CYGNUS_PINRANGE(128, 43, 1),
> +	CYGNUS_PINRANGE(129, 47, 1),
> +	CYGNUS_PINRANGE(130, 49, 1),
> +	CYGNUS_PINRANGE(131, 53, 1),
> +	CYGNUS_PINRANGE(132, 55, 1),
> +	CYGNUS_PINRANGE(133, 59, 1),
> +	CYGNUS_PINRANGE(134, 63, 1),
> +	CYGNUS_PINRANGE(135, 67, 1),
> +	CYGNUS_PINRANGE(136, 71, 1),
> +	CYGNUS_PINRANGE(137, 73, 1),
> +	CYGNUS_PINRANGE(138, 77, 1),
> +	CYGNUS_PINRANGE(139, 79, 1),
> +	CYGNUS_PINRANGE(140, 81, 1),
> +	CYGNUS_PINRANGE(141, 83, 1),
> +	CYGNUS_PINRANGE(142, 10, 1)
> +};
> +
> +/*
> + * The Cygnus IOMUX controller mainly supports group based mux configuration,
> + * but certain pins can be muxed to GPIO individually. Only the ASIU GPIO
> + * controller can support this, so it's an optional configuration
> + *
> + * Return -ENODEV means no support and that's fine
> + */
> +static int cygnus_gpio_pinmux_add_range(struct cygnus_gpio *chip)
> +{
> +	struct device_node *node = chip->dev->of_node;
> +	struct device_node *pinmux_node;
> +	struct platform_device *pinmux_pdev;
> +	struct gpio_chip *gc = &chip->gc;
> +	int i, ret;
> +
> +	/* parse DT to find the phandle to the pinmux controller */
> +	pinmux_node = of_parse_phandle(node, "pinmux", 0);
> +	if (!pinmux_node)
> +		return -ENODEV;
> +
> +	pinmux_pdev = of_find_device_by_node(pinmux_node);
> +	if (!pinmux_pdev) {
> +		dev_err(chip->dev, "failed to get pinmux device\n");
> +		return -EINVAL;
> +	}
> +
> +	/* now need to create the mapping between local GPIO and PINMUX pins */
> +	for (i = 0; i < ARRAY_SIZE(cygnus_gpio_pintable); i++) {
> +		ret = gpiochip_add_pin_range(gc, dev_name(&pinmux_pdev->dev),
> +					     cygnus_gpio_pintable[i].offset,
> +					     cygnus_gpio_pintable[i].pin_base,
> +					     cygnus_gpio_pintable[i].num_pins);
> +		if (ret) {
> +			dev_err(chip->dev, "unable to add GPIO pin range\n");
> +			goto err_rm_pin_range;
> +		}
> +	}
> +
> +	chip->pinmux_is_supported = 1;

	chip->pinmux_is_supported = true;

?

> +	return 0;
> +
> +err_rm_pin_range:
> +	gpiochip_remove_pin_ranges(gc);

I think you need:

	put_dveice(&pinmux_pdev->dev);

since of_find_device_by_node calls bus_find_device() that takes
reference to found device.

... And now that I look at this majority of users of
of_find_device_by_node() is broken like that :(

BTW, it looks like you only need pinmux_dev for it's name so you
probably need to drop reference in success path as well.

> +	return ret;
> +}
> +
> +static void cygnus_gpio_pinmux_remove_range(struct cygnus_gpio *chip)
> +{
> +	struct gpio_chip *gc = &chip->gc;
> +
> +	if (chip->pinmux_is_supported)
> +		gpiochip_remove_pin_ranges(gc);
> +}
> +
> +/*
> + * Cygnus GPIO controller supports some PINCONF related configurations such as
> + * pull up, pull down, and drive strength, when the pin is configured to GPIO
> + *
> + * Here a local pinctrl device is created with simple 1-to-1 pin mapping to the
> + * local GPIO pins
> + */
> +static int cygnus_gpio_register_pinconf(struct cygnus_gpio *chip)
> +{
> +	struct pinctrl_desc *pctldesc = &chip->pctldesc;
> +	struct pinctrl_pin_desc *pins;
> +	struct gpio_chip *gc = &chip->gc;
> +	int i, ret;
> +
> +	pins = devm_kcalloc(chip->dev, gc->ngpio, sizeof(*pins), GFP_KERNEL);
> +	if (!pins)
> +		return -ENOMEM;
> +	chip->pins = pins;
> +
> +	for (i = 0; i < gc->ngpio; i++) {
> +		pins[i].number = i;
> +		pins[i].name = kasprintf(GFP_KERNEL, "gpio-%d", i);

We have devm_kasprintf().

> +		if (!pins[i].name) {
> +			ret = -ENOMEM;
> +			goto err_kfree;
> +		}
> +	}
> +
> +	pctldesc->name = dev_name(chip->dev);
> +	pctldesc->pctlops = &cygnus_pctrl_ops;
> +	pctldesc->pins = pins;
> +	pctldesc->npins = gc->ngpio;
> +	pctldesc->confops = &cygnus_pconf_ops;
> +
> +	chip->pctl = pinctrl_register(pctldesc, chip->dev, chip);
> +	if (!chip->pctl) {
> +		dev_err(chip->dev, "unable to register pinctrl device\n");
> +		ret = -EINVAL;
> +		goto err_kfree;
> +	}
> +
> +	return 0;
> +
> +err_kfree:
> +	for (i = 0; i < gc->ngpio; i++)
> +		kfree(pins[i].name);
> +
> +	return ret;
> +}
> +
> +static void cygnus_gpio_unregister_pinconf(struct cygnus_gpio *chip)
> +{
> +	struct gpio_chip *gc = &chip->gc;
> +	int i;
> +
> +	if (chip->pctl)
> +		pinctrl_unregister(chip->pctl);
> +
> +	for (i = 0; i < gc->ngpio; i++)
> +		kfree(chip->pins[i].name);

Should not be needed if you use devm_kasprintf.

> +}
> +
> +static const struct of_device_id cygnus_gpio_of_match[] = {
> +	{ .compatible = "brcm,cygnus-gpio" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, cygnus_gpio_of_match);
> +
> +static int cygnus_gpio_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct resource *res;
> +	struct cygnus_gpio *chip;
> +	struct gpio_chip *gc;
> +	u32 ngpios;
> +	int irq, ret;
> +
> +	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
> +	if (!chip)
> +		return -ENOMEM;
> +
> +	chip->dev = dev;
> +	platform_set_drvdata(pdev, chip);
> +
> +	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
> +		dev_err(dev, "missing ngpios DT property\n");
> +		return -ENODEV;
> +	}
> +	chip->num_banks = (ngpios + NGPIOS_PER_BANK - 1) / NGPIOS_PER_BANK;
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	chip->base = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(chip->base)) {
> +		dev_err(dev, "unable to map I/O memory\n");
> +		return PTR_ERR(chip->base);
> +	}
> +
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> +	if (res) {
> +		chip->io_ctrl = devm_ioremap_resource(dev, res);
> +		if (IS_ERR(chip->io_ctrl)) {
> +			dev_err(dev, "unable to map I/O memory\n");
> +			return PTR_ERR(chip->io_ctrl);
> +		}
> +	}
> +
> +	spin_lock_init(&chip->lock);
> +
> +	gc = &chip->gc;
> +	gc->base = -1;
> +	gc->ngpio = ngpios;
> +	gc->label = dev_name(dev);
> +	gc->dev = dev;
> +	gc->of_node = dev->of_node;
> +	gc->request = cygnus_gpio_request;
> +	gc->free = cygnus_gpio_free;
> +	gc->direction_input = cygnus_gpio_direction_input;
> +	gc->direction_output = cygnus_gpio_direction_output;
> +	gc->set = cygnus_gpio_set;
> +	gc->get = cygnus_gpio_get;
> +
> +	ret = gpiochip_add(gc);
> +	if (ret < 0) {
> +		dev_err(dev, "unable to add GPIO chip\n");
> +		return ret;
> +	}
> +
> +	ret = cygnus_gpio_pinmux_add_range(chip);
> +	if (ret && ret != -ENODEV) {
> +		dev_err(dev, "unable to add GPIO pin range\n");
> +		goto err_rm_gpiochip;
> +	}
> +
> +	ret = cygnus_gpio_register_pinconf(chip);
> +	if (ret) {
> +		dev_err(dev, "unable to register pinconf\n");
> +		goto err_rm_range;
> +	}
> +
> +	/* optional GPIO interrupt support */
> +	irq = platform_get_irq(pdev, 0);
> +	if (irq) {
> +		ret = gpiochip_irqchip_add(gc, &cygnus_gpio_irq_chip, 0,
> +					   handle_simple_irq, IRQ_TYPE_NONE);
> +		if (ret) {
> +			dev_err(dev, "no GPIO irqchip\n");
> +			goto err_unregister_pinconf;
> +		}
> +
> +		gpiochip_set_chained_irqchip(gc, &cygnus_gpio_irq_chip, irq,
> +					     cygnus_gpio_irq_handler);
> +	}
> +
> +	return 0;
> +
> +err_unregister_pinconf:
> +	cygnus_gpio_unregister_pinconf(chip);
> +
> +err_rm_range:
> +	cygnus_gpio_pinmux_remove_range(chip);
> +
> +err_rm_gpiochip:
> +	gpiochip_remove(gc);
> +
> +	return ret;
> +}
> +
> +static struct platform_driver cygnus_gpio_driver = {
> +	.driver = {
> +		.name = "cygnus-gpio",
> +		.of_match_table = cygnus_gpio_of_match,
> +	},
> +	.probe = cygnus_gpio_probe,

The same comment about suppress_bind_attrs.

> +};
> +
> +static int __init cygnus_gpio_init(void)
> +{
> +	return platform_driver_probe(&cygnus_gpio_driver, cygnus_gpio_probe);
> +}
> +arch_initcall_sync(cygnus_gpio_init);
> +
> +MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
> +MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
> +MODULE_LICENSE("GPL v2");
> -- 
> 1.7.9.5
> 

Thanks.

-- 
Dmitry

Re: [PATCH v7 2/4] pinctrl: cygnus: add gpio/pinconf driver

[Ray Jui]

On 2/3/2015 5:41 PM, Dmitry Torokhov wrote:
> On Tue, Feb 03, 2015 at 05:09:06PM -0800, Ray Jui wrote:
>> This adds the initial support of the Broadcom Cygnus GPIO/PINCONF driver
>> that supports all 3 GPIO controllers on Cygnus including the ASIU GPIO
>> controller, the chipCommonG GPIO controller, and the always-on GPIO
>> controller. Basic PINCONF configurations such as bias pull up/down, and
>> drive strength are also supported in this driver.
>>
>> Pins from the ASIU GPIO controller can be individually muxed to GPIO
>> function, through interaction with the Cygnus IOMUX controller
>>
>> Signed-off-by: Ray Jui <rjui@broadcom.com>
>> Reviewed-by: Scott Branden <sbranden@broadcom.com>
>> ---
>>  drivers/pinctrl/bcm/Kconfig               |   22 +
>>  drivers/pinctrl/bcm/Makefile              |    1 +
>>  drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c |  920 +++++++++++++++++++++++++++++
>>  3 files changed, 943 insertions(+)
>>  create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
>>
>> diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
>> index eb13201..cd11d4d 100644
>> --- a/drivers/pinctrl/bcm/Kconfig
>> +++ b/drivers/pinctrl/bcm/Kconfig
>> @@ -20,6 +20,28 @@ config PINCTRL_BCM2835
>>  	select PINMUX
>>  	select PINCONF
>>  
>> +config PINCTRL_CYGNUS_GPIO
>> +	bool "Broadcom Cygnus GPIO (with PINCONF) driver"
>> +	depends on OF_GPIO && ARCH_BCM_CYGNUS
>> +	select GPIOLIB_IRQCHIP
>> +	select PINCONF
>> +	select GENERIC_PINCONF
>> +	default ARCH_BCM_CYGNUS
>> +	help
>> +	  Say yes here to enable the Broadcom Cygnus GPIO driver.
>> +
>> +	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
>> +	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
>> +	  the always-ON GPIO controller (CRMU/AON). All 3 GPIO controllers are
>> +	  supported by this driver.
>> +
>> +	  All 3 Cygnus GPIO controllers support basic PINCONF functions such
>> +	  as bias pull up, pull down, and drive strength configurations, when
>> +	  these pins are muxed to GPIO.
>> +
>> +	  Pins from the ASIU GPIO can be individually muxed to GPIO function,
>> +	  through interaction with the Cygnus IOMUX controller.
>> +
>>  config PINCTRL_CYGNUS_MUX
>>  	bool "Broadcom Cygnus IOMUX driver"
>>  	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
>> diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
>> index bb6beb6..2b2f70e 100644
>> --- a/drivers/pinctrl/bcm/Makefile
>> +++ b/drivers/pinctrl/bcm/Makefile
>> @@ -2,4 +2,5 @@
>>  
>>  obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
>>  obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
>> +obj-$(CONFIG_PINCTRL_CYGNUS_GPIO)	+= pinctrl-cygnus-gpio.o
>>  obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
>> diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
>> new file mode 100644
>> index 0000000..cfe4478
>> --- /dev/null
>> +++ b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
>> @@ -0,0 +1,920 @@
>> +/*
>> + * Copyright (C) 2014-2015 Broadcom Corporation
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License as
>> + * published by the Free Software Foundation version 2.
>> + *
>> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
>> + * kind, whether express or implied; without even the implied warranty
>> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> + * GNU General Public License for more details.
>> + *
>> + * This file contains the Broadcom Cygnus GPIO driver that supports 3
>> + * GPIO controllers on Cygnus including the ASIU GPIO controller, the
>> + * chipCommonG GPIO controller, and the always-on GPIO controller. Basic
>> + * PINCONF such as bias pull up/down, and drive strength are also supported
>> + * in this driver.
>> + *
>> + * Pins from the ASIU GPIO can be individually muxed to GPIO function,
>> + * through the interaction with the Cygnus IOMUX controller
>> + */
>> +
>> +#include <linux/kernel.h>
>> +#include <linux/slab.h>
>> +#include <linux/module.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/io.h>
>> +#include <linux/gpio.h>
>> +#include <linux/ioport.h>
>> +#include <linux/of_device.h>
>> +#include <linux/of_irq.h>
>> +#include <linux/pinctrl/pinctrl.h>
>> +#include <linux/pinctrl/pinmux.h>
>> +#include <linux/pinctrl/pinconf.h>
>> +#include <linux/pinctrl/pinconf-generic.h>
>> +
>> +#include "../pinctrl-utils.h"
>> +
>> +#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
>> +#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
>> +#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
>> +#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
>> +#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
>> +#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
>> +#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
>> +#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
>> +#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
>> +#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
>> +#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
>> +#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
>> +
>> +/* drive strength control for ASIU GPIO */
>> +#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
>> +
>> +/* drive strength control for CCM/CRMU (AON) GPIO */
>> +#define CYGNUS_GPIO_DRV0_CTRL_OFFSET  0x00
>> +
>> +#define GPIO_BANK_SIZE 0x200
>> +#define NGPIOS_PER_BANK 32
>> +#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
>> +
>> +#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
>> +#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
>> +
>> +#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
>> +#define GPIO_DRV_STRENGTH_BITS       3
>> +#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
>> +
>> +/*
>> + * Cygnus GPIO core
>> + *
>> + * @dev: pointer to device
>> + * @base: I/O register base for Cygnus GPIO controller
>> + * @io_ctrl: I/O register base for certain type of Cygnus GPIO controller that
>> + * has the PINCONF support implemented outside of the GPIO block
>> + * @lock: lock to protect access to I/O registers
>> + * @gc: GPIO chip
>> + * @num_banks: number of GPIO banks, each bank supports up to 32 GPIOs
>> + * @pinmux_is_supported: flag to indicate this GPIO controller contains pins
>> + * that can be individually muxed to GPIO
>> + * @pctl: pointer to pinctrl_dev
>> + * @pctldesc: pinctrl descriptor
>> + * @pins: pointer to array of pins
>> + */
>> +struct cygnus_gpio {
>> +	struct device *dev;
>> +
>> +	void __iomem *base;
>> +	void __iomem *io_ctrl;
>> +
>> +	spinlock_t lock;
>> +
>> +	struct gpio_chip gc;
>> +	unsigned num_banks;
>> +
>> +	int pinmux_is_supported;
> 
> bool?
> 
Yes. Will do.

>> +
>> +	struct pinctrl_dev *pctl;
>> +	struct pinctrl_desc pctldesc;
>> +	struct pinctrl_pin_desc *pins;
>> +};
>> +
>> +static struct cygnus_gpio *to_cygnus_gpio(struct gpio_chip *gc)
>> +{
>> +	return container_of(gc, struct cygnus_gpio, gc);
>> +}
>> +
>> +/*
>> + * Mapping from PINCONF pins to GPIO pins is 1-to-1
>> + */
>> +static unsigned cygnus_pin_to_gpio(unsigned pin)
>> +{
>> +	return pin;
>> +}
>> +
>> +static u32 cygnus_readl(struct cygnus_gpio *chip, unsigned int offset)
>> +{
>> +	return readl(chip->base + offset);
>> +}
>> +
>> +static void cygnus_writel(struct cygnus_gpio *chip, unsigned int offset,
>> +			  u32 val)
>> +{
>> +	writel(val, chip->base + offset);
>> +}
>> +
>> +/**
>> + *  cygnus_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
>> + *  Cygnus GPIO register
>> + *
>> + *  @cygnus_gpio: Cygnus GPIO device
>> + *  @reg: register offset
>> + *  @gpio: GPIO pin
>> + *  @set: set or clear. 1 - set; 0 -clear
>> + */
>> +static void cygnus_set_bit(struct cygnus_gpio *chip, unsigned int reg,
>> +			   unsigned gpio, int set)
>> +{
>> +	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
>> +	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
>> +	u32 val;
>> +
>> +	val = cygnus_readl(chip, offset);
>> +	if (set)
>> +		val |= BIT(shift);
>> +	else
>> +		val &= ~BIT(shift);
>> +	cygnus_writel(chip, offset, val);
>> +}
>> +
>> +static int cygnus_get_bit(struct cygnus_gpio *chip, unsigned int reg,
>> +			  unsigned gpio)
>> +{
>> +	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
>> +	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
>> +	u32 val;
>> +
>> +	val = cygnus_readl(chip, offset) & BIT(shift);
>> +	if (val)
>> +		return 1;
>> +	else
>> +		return 0;
>> +}
>> +
>> +static void cygnus_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
>> +{
>> +	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	struct irq_chip *irq_chip = irq_desc_get_chip(desc);
>> +	int i, bit;
>> +
>> +	chained_irq_enter(irq_chip, desc);
>> +
>> +	/* go through the entire GPIO banks and handle all interrupts */
>> +	for (i = 0; i < chip->num_banks; i++) {
>> +		unsigned long val = cygnus_readl(chip,
>> +				(i * GPIO_BANK_SIZE) +
>> +				CYGNUS_GPIO_INT_MSTAT_OFFSET);
>> +
>> +		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
>> +			unsigned pin = NGPIOS_PER_BANK * i + bit;
>> +			int child_irq = irq_find_mapping(gc->irqdomain, pin);
>> +
>> +			/*
>> +			 * Clear the interrupt before invoking the
>> +			 * handler, so we do not leave any window
>> +			 */
>> +			cygnus_writel(chip, (i * GPIO_BANK_SIZE) +
>> +				      CYGNUS_GPIO_INT_CLR_OFFSET, BIT(bit));
>> +
>> +			generic_handle_irq(child_irq);
>> +		}
>> +	}
>> +
>> +	chained_irq_exit(irq_chip, desc);
>> +}
>> +
>> +
>> +static void cygnus_gpio_irq_ack(struct irq_data *d)
>> +{
>> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned gpio = d->hwirq;
>> +	unsigned int offset = CYGNUS_GPIO_REG(gpio,
>> +			CYGNUS_GPIO_INT_CLR_OFFSET);
>> +	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
>> +	u32 val = BIT(shift);
>> +
>> +	cygnus_writel(chip, offset, val);
>> +}
>> +
>> +/**
>> + *  cygnus_gpio_irq_set_mask - mask/unmask a GPIO interrupt
>> + *
>> + *  @d: IRQ chip data
>> + *  @mask: mask/unmask GPIO interrupt. 0 - mask (disable); 1 - unmask (enable)
>> + */
>> +static void cygnus_gpio_irq_set_mask(struct irq_data *d, int mask)
>> +{
>> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned gpio = d->hwirq;
>> +
>> +	cygnus_set_bit(chip, CYGNUS_GPIO_INT_MSK_OFFSET, gpio, mask);
>> +}
>> +
>> +static void cygnus_gpio_irq_mask(struct irq_data *d)
>> +{
>> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned long flags;
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	cygnus_gpio_irq_set_mask(d, 0);
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +}
>> +
>> +static void cygnus_gpio_irq_unmask(struct irq_data *d)
>> +{
>> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned long flags;
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	cygnus_gpio_irq_set_mask(d, 1);
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +}
>> +
>> +static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
>> +{
>> +	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned gpio = d->hwirq;
>> +	int int_type = 0, dual_edge = 0, edge_lvl = 0;
>> +	unsigned long flags;
>> +
>> +	switch (type & IRQ_TYPE_SENSE_MASK) {
>> +	case IRQ_TYPE_EDGE_RISING:
>> +		edge_lvl = 1;
>> +		break;
>> +
>> +	case IRQ_TYPE_EDGE_FALLING:
>> +		break;
>> +
>> +	case IRQ_TYPE_EDGE_BOTH:
>> +		dual_edge = 1;
>> +		break;
>> +
>> +	case IRQ_TYPE_LEVEL_HIGH:
>> +		int_type = 1;
>> +		edge_lvl = 1;
>> +		break;
>> +
>> +	case IRQ_TYPE_LEVEL_LOW:
>> +		int_type = 1;
>> +		break;
>> +
>> +	default:
>> +		dev_err(chip->dev, "invalid GPIO IRQ type 0x%x\n",
>> +			type);
>> +		return -EINVAL;
>> +	}
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	cygnus_set_bit(chip, CYGNUS_GPIO_IN_TYPE_OFFSET, gpio, int_type);
>> +	cygnus_set_bit(chip, CYGNUS_GPIO_INT_DE_OFFSET, gpio, dual_edge);
>> +	cygnus_set_bit(chip, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio,
>> +		       edge_lvl);
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +
>> +	dev_dbg(chip->dev,
>> +		"gpio:%u set int_type:%d dual_edge:%d edge_lvl:%d\n",
>> +		gpio, int_type, dual_edge, edge_lvl);
>> +
>> +	return 0;
>> +}
>> +
>> +static struct irq_chip cygnus_gpio_irq_chip = {
>> +	.name = "bcm-cygnus-gpio",
>> +	.irq_ack = cygnus_gpio_irq_ack,
>> +	.irq_mask = cygnus_gpio_irq_mask,
>> +	.irq_unmask = cygnus_gpio_irq_unmask,
>> +	.irq_set_type = cygnus_gpio_irq_set_type,
>> +};
>> +
>> +/*
>> + * Request the Cygnus IOMUX pinmux controller to mux individual pins to GPIO
>> + */
>> +static int cygnus_gpio_request(struct gpio_chip *gc, unsigned offset)
>> +{
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned gpio = gc->base + offset;
>> +
>> +	/* not all Cygnus GPIO pins can be muxed individually */
>> +	if (!chip->pinmux_is_supported)
>> +		return 0;
>> +
>> +	return pinctrl_request_gpio(gpio);
>> +}
>> +
>> +static void cygnus_gpio_free(struct gpio_chip *gc, unsigned offset)
>> +{
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned gpio = gc->base + offset;
>> +
>> +	if (!chip->pinmux_is_supported)
>> +		return;
>> +
>> +	pinctrl_free_gpio(gpio);
>> +}
>> +
>> +static int cygnus_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
>> +{
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned long flags;
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 0);
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +
>> +	dev_dbg(chip->dev, "gpio:%u set input\n", gpio);
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_gpio_direction_output(struct gpio_chip *gc, unsigned gpio,
>> +					int value)
>> +{
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned long flags;
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 1);
>> +	cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +
>> +	dev_dbg(chip->dev, "gpio:%u set output, value:%d\n", gpio, value);
>> +
>> +	return 0;
>> +}
>> +
>> +static void cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio, int value)
>> +{
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned long flags;
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +
>> +	dev_dbg(chip->dev, "gpio:%u set, value:%d\n", gpio, value);
>> +}
>> +
>> +static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
>> +{
>> +	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
>> +	unsigned int offset = CYGNUS_GPIO_REG(gpio,
>> +					      CYGNUS_GPIO_DATA_IN_OFFSET);
>> +	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
>> +
>> +	return !!(cygnus_readl(chip, offset) & BIT(shift));
>> +}
>> +
>> +static int cygnus_get_groups_count(struct pinctrl_dev *pctldev)
>> +{
>> +	return 1;
>> +}
>> +
>> +/*
>> + * Only one group: "gpio_grp", since this local pinctrl device only performs
>> + * GPIO specific PINCONF configurations
>> + */
>> +static const char *cygnus_get_group_name(struct pinctrl_dev *pctldev,
>> +					 unsigned selector)
>> +{
>> +
> 
> Extra blank line.
> 
Thanks!

>> +	return "gpio_grp";
>> +}
>> +
>> +static const struct pinctrl_ops cygnus_pctrl_ops = {
>> +	.get_groups_count = cygnus_get_groups_count,
>> +	.get_group_name = cygnus_get_group_name,
>> +	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
>> +	.dt_free_map = pinctrl_utils_dt_free_map,
>> +};
>> +
>> +static int cygnus_gpio_set_pull(struct cygnus_gpio *chip, unsigned gpio,
>> +				int disable, int pull_up)
>> +{
>> +	unsigned long flags;
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +
>> +	if (disable) {
>> +		cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 0);
>> +	} else {
>> +		cygnus_set_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio,
>> +			       pull_up);
>> +		cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 1);
>> +	}
>> +
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +
>> +	dev_dbg(chip->dev, "gpio:%u set pullup:%d\n", gpio, pull_up);
>> +
>> +	return 0;
>> +}
>> +
>> +static void cygnus_gpio_get_pull(struct cygnus_gpio *chip, unsigned gpio,
>> +				 int *disable, int *pull_up)
>> +{
>> +	unsigned long flags;
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	*disable = !cygnus_get_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio);
>> +	*pull_up = cygnus_get_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio);
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +}
>> +
>> +static int cygnus_gpio_set_strength(struct cygnus_gpio *chip, unsigned gpio,
>> +				    unsigned strength)
>> +{
>> +	void __iomem *base;
>> +	unsigned int i, offset, shift;
>> +	u32 val;
>> +	unsigned long flags;
>> +
>> +	/* make sure drive strength is supported */
>> +	if (strength < 2 ||  strength > 16 || (strength % 2))
>> +		return -ENOTSUPP;
>> +
>> +	if (chip->io_ctrl) {
>> +		base = chip->io_ctrl;
>> +		offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
>> +	} else {
>> +		base = chip->base;
>> +		offset = CYGNUS_GPIO_REG(gpio,
>> +					 CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
>> +	}
>> +
>> +	shift = CYGNUS_GPIO_SHIFT(gpio);
>> +
>> +	dev_dbg(chip->dev, "gpio:%u set drive strength:%d mA\n", gpio,
>> +		strength);
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	strength = (strength / 2) - 1;
>> +	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
>> +		val = readl(base + offset);
>> +		val &= ~BIT(shift);
>> +		val |= ((strength >> i) & 0x1) << shift;
>> +		writel(val, base + offset);
>> +		offset += 4;
>> +	}
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_gpio_get_strength(struct cygnus_gpio *chip, unsigned gpio,
>> +				    u16 *strength)
>> +{
>> +	void __iomem *base;
>> +	unsigned int i, offset, shift;
>> +	u32 val;
>> +	unsigned long flags;
>> +
>> +	if (chip->io_ctrl) {
>> +		base = chip->io_ctrl;
>> +		offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
>> +	} else {
>> +		base = chip->base;
>> +		offset = CYGNUS_GPIO_REG(gpio,
>> +					 CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
>> +	}
>> +
>> +	shift = CYGNUS_GPIO_SHIFT(gpio);
>> +
>> +	spin_lock_irqsave(&chip->lock, flags);
>> +	*strength = 0;
>> +	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
>> +		val = readl(base + offset) & BIT(shift);
>> +		val >>= shift;
>> +		*strength += (val << i);
>> +		offset += 4;
>> +	}
>> +
>> +	/* convert to mA */
>> +	*strength = (*strength + 1) * 2;
>> +	spin_unlock_irqrestore(&chip->lock, flags);
>> +
>> +	return 0;
>> +}
>> +
>> +static int cygnus_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
>> +				 unsigned long *config)
>> +{
>> +	struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
>> +	enum pin_config_param param = pinconf_to_config_param(*config);
>> +	unsigned gpio = cygnus_pin_to_gpio(pin);
>> +	u16 arg;
>> +	int disable, pull_up, ret;
>> +
>> +	switch (param) {
>> +	case PIN_CONFIG_BIAS_DISABLE:
>> +		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
>> +		if (disable)
>> +			return 0;
>> +		else
>> +			return -EINVAL;
>> +
>> +	case PIN_CONFIG_BIAS_PULL_UP:
>> +		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
>> +		if (!disable && pull_up)
>> +			return 0;
>> +		else
>> +			return -EINVAL;
>> +
>> +	case PIN_CONFIG_BIAS_PULL_DOWN:
>> +		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
>> +		if (!disable && !pull_up)
>> +			return 0;
>> +		else
>> +			return -EINVAL;
>> +
>> +	case PIN_CONFIG_DRIVE_STRENGTH:
>> +		ret = cygnus_gpio_get_strength(chip, gpio, &arg);
>> +		if (ret)
>> +			return ret;
>> +		else
>> +			*config = pinconf_to_config_packed(param, arg);
>> +
>> +		return 0;
>> +
>> +	default:
>> +		return -ENOTSUPP;
>> +	}
>> +
>> +	return -ENOTSUPP;
>> +}
>> +
>> +static int cygnus_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
>> +				 unsigned long *configs, unsigned num_configs)
>> +{
>> +	struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
>> +	enum pin_config_param param;
>> +	u16 arg;
>> +	unsigned i, gpio = cygnus_pin_to_gpio(pin);
>> +	int ret = -ENOTSUPP;
>> +
>> +	for (i = 0; i < num_configs; i++) {
>> +		param = pinconf_to_config_param(configs[i]);
>> +		arg = pinconf_to_config_argument(configs[i]);
>> +
>> +		switch (param) {
>> +		case PIN_CONFIG_BIAS_DISABLE:
>> +			ret = cygnus_gpio_set_pull(chip, gpio, 1, 0);
>> +			if (ret < 0)
>> +				goto out;
>> +			break;
>> +
>> +		case PIN_CONFIG_BIAS_PULL_UP:
>> +			ret = cygnus_gpio_set_pull(chip, gpio, 0, 1);
>> +			if (ret < 0)
>> +				goto out;
>> +			break;
>> +
>> +		case PIN_CONFIG_BIAS_PULL_DOWN:
>> +			ret = cygnus_gpio_set_pull(chip, gpio, 0, 0);
>> +			if (ret < 0)
>> +				goto out;
>> +			break;
>> +
>> +		case PIN_CONFIG_DRIVE_STRENGTH:
>> +			ret = cygnus_gpio_set_strength(chip, gpio, arg);
>> +			if (ret < 0)
>> +				goto out;
>> +			break;
>> +
>> +		default:
>> +			dev_err(chip->dev, "invalid configuration\n");
>> +			return -ENOTSUPP;
>> +		}
>> +	} /* for each config */
>> +
>> +out:
>> +	return ret;
>> +}
>> +
>> +static const struct pinconf_ops cygnus_pconf_ops = {
>> +	.is_generic = true,
>> +	.pin_config_get = cygnus_pin_config_get,
>> +	.pin_config_set = cygnus_pin_config_set,
>> +};
>> +
>> +/*
>> + * Map a GPIO in the local gpio_chip pin space to a pin in the Cygnus IOMUX
>> + * pinctrl pin space
>> + */
>> +struct cygnus_gpio_pin_range {
>> +	unsigned offset;
>> +	unsigned pin_base;
>> +	unsigned num_pins;
>> +};
>> +
>> +#define CYGNUS_PINRANGE(o, p, n) { .offset = o, .pin_base = p, .num_pins = n }
>> +
>> +/*
>> + * Pin mapping table for mapping local GPIO pins to Cygnus IOMUX pinctrl pins
>> + */
>> +static const struct cygnus_gpio_pin_range cygnus_gpio_pintable[] = {
>> +	CYGNUS_PINRANGE(0, 42, 1),
>> +	CYGNUS_PINRANGE(1, 44, 3),
>> +	CYGNUS_PINRANGE(4, 48, 1),
>> +	CYGNUS_PINRANGE(5, 50, 3),
>> +	CYGNUS_PINRANGE(8, 126, 1),
>> +	CYGNUS_PINRANGE(9, 155, 1),
>> +	CYGNUS_PINRANGE(10, 152, 1),
>> +	CYGNUS_PINRANGE(11, 154, 1),
>> +	CYGNUS_PINRANGE(12, 153, 1),
>> +	CYGNUS_PINRANGE(13, 127, 3),
>> +	CYGNUS_PINRANGE(16, 140, 1),
>> +	CYGNUS_PINRANGE(17, 145, 7),
>> +	CYGNUS_PINRANGE(24, 130, 10),
>> +	CYGNUS_PINRANGE(34, 141, 4),
>> +	CYGNUS_PINRANGE(38, 54, 1),
>> +	CYGNUS_PINRANGE(39, 56, 3),
>> +	CYGNUS_PINRANGE(42, 60, 3),
>> +	CYGNUS_PINRANGE(45, 64, 3),
>> +	CYGNUS_PINRANGE(48, 68, 2),
>> +	CYGNUS_PINRANGE(50, 84, 6),
>> +	CYGNUS_PINRANGE(56, 94, 6),
>> +	CYGNUS_PINRANGE(62, 72, 1),
>> +	CYGNUS_PINRANGE(63, 70, 1),
>> +	CYGNUS_PINRANGE(64, 80, 1),
>> +	CYGNUS_PINRANGE(65, 74, 3),
>> +	CYGNUS_PINRANGE(68, 78, 1),
>> +	CYGNUS_PINRANGE(69, 82, 1),
>> +	CYGNUS_PINRANGE(70, 156, 17),
>> +	CYGNUS_PINRANGE(87, 104, 12),
>> +	CYGNUS_PINRANGE(99, 102, 2),
>> +	CYGNUS_PINRANGE(101, 90, 4),
>> +	CYGNUS_PINRANGE(105, 116, 10),
>> +	CYGNUS_PINRANGE(123, 11, 1),
>> +	CYGNUS_PINRANGE(124, 38, 4),
>> +	CYGNUS_PINRANGE(128, 43, 1),
>> +	CYGNUS_PINRANGE(129, 47, 1),
>> +	CYGNUS_PINRANGE(130, 49, 1),
>> +	CYGNUS_PINRANGE(131, 53, 1),
>> +	CYGNUS_PINRANGE(132, 55, 1),
>> +	CYGNUS_PINRANGE(133, 59, 1),
>> +	CYGNUS_PINRANGE(134, 63, 1),
>> +	CYGNUS_PINRANGE(135, 67, 1),
>> +	CYGNUS_PINRANGE(136, 71, 1),
>> +	CYGNUS_PINRANGE(137, 73, 1),
>> +	CYGNUS_PINRANGE(138, 77, 1),
>> +	CYGNUS_PINRANGE(139, 79, 1),
>> +	CYGNUS_PINRANGE(140, 81, 1),
>> +	CYGNUS_PINRANGE(141, 83, 1),
>> +	CYGNUS_PINRANGE(142, 10, 1)
>> +};
>> +
>> +/*
>> + * The Cygnus IOMUX controller mainly supports group based mux configuration,
>> + * but certain pins can be muxed to GPIO individually. Only the ASIU GPIO
>> + * controller can support this, so it's an optional configuration
>> + *
>> + * Return -ENODEV means no support and that's fine
>> + */
>> +static int cygnus_gpio_pinmux_add_range(struct cygnus_gpio *chip)
>> +{
>> +	struct device_node *node = chip->dev->of_node;
>> +	struct device_node *pinmux_node;
>> +	struct platform_device *pinmux_pdev;
>> +	struct gpio_chip *gc = &chip->gc;
>> +	int i, ret;
>> +
>> +	/* parse DT to find the phandle to the pinmux controller */
>> +	pinmux_node = of_parse_phandle(node, "pinmux", 0);
>> +	if (!pinmux_node)
>> +		return -ENODEV;
>> +
>> +	pinmux_pdev = of_find_device_by_node(pinmux_node);
>> +	if (!pinmux_pdev) {
>> +		dev_err(chip->dev, "failed to get pinmux device\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	/* now need to create the mapping between local GPIO and PINMUX pins */
>> +	for (i = 0; i < ARRAY_SIZE(cygnus_gpio_pintable); i++) {
>> +		ret = gpiochip_add_pin_range(gc, dev_name(&pinmux_pdev->dev),
>> +					     cygnus_gpio_pintable[i].offset,
>> +					     cygnus_gpio_pintable[i].pin_base,
>> +					     cygnus_gpio_pintable[i].num_pins);
>> +		if (ret) {
>> +			dev_err(chip->dev, "unable to add GPIO pin range\n");
>> +			goto err_rm_pin_range;
>> +		}
>> +	}
>> +
>> +	chip->pinmux_is_supported = 1;
> 
> 	chip->pinmux_is_supported = true;
> 
> ?
> 
>> +	return 0;
>> +
>> +err_rm_pin_range:
>> +	gpiochip_remove_pin_ranges(gc);
> 
> I think you need:
> 
> 	put_dveice(&pinmux_pdev->dev);
> 
> since of_find_device_by_node calls bus_find_device() that takes
> reference to found device.
> 
> ... And now that I look at this majority of users of
> of_find_device_by_node() is broken like that :(
> 
> BTW, it looks like you only need pinmux_dev for it's name so you
> probably need to drop reference in success path as well.
> 
Oh wow! Really good to know. Will fix!

>> +	return ret;
>> +}
>> +
>> +static void cygnus_gpio_pinmux_remove_range(struct cygnus_gpio *chip)
>> +{
>> +	struct gpio_chip *gc = &chip->gc;
>> +
>> +	if (chip->pinmux_is_supported)
>> +		gpiochip_remove_pin_ranges(gc);
>> +}
>> +
>> +/*
>> + * Cygnus GPIO controller supports some PINCONF related configurations such as
>> + * pull up, pull down, and drive strength, when the pin is configured to GPIO
>> + *
>> + * Here a local pinctrl device is created with simple 1-to-1 pin mapping to the
>> + * local GPIO pins
>> + */
>> +static int cygnus_gpio_register_pinconf(struct cygnus_gpio *chip)
>> +{
>> +	struct pinctrl_desc *pctldesc = &chip->pctldesc;
>> +	struct pinctrl_pin_desc *pins;
>> +	struct gpio_chip *gc = &chip->gc;
>> +	int i, ret;
>> +
>> +	pins = devm_kcalloc(chip->dev, gc->ngpio, sizeof(*pins), GFP_KERNEL);
>> +	if (!pins)
>> +		return -ENOMEM;
>> +	chip->pins = pins;
>> +
>> +	for (i = 0; i < gc->ngpio; i++) {
>> +		pins[i].number = i;
>> +		pins[i].name = kasprintf(GFP_KERNEL, "gpio-%d", i);
> 
> We have devm_kasprintf().
> 
I was not aware of that. Okay I'll change to devm_kasprintf so I can get
rid of some memory free code below. Thanks!

>> +		if (!pins[i].name) {
>> +			ret = -ENOMEM;
>> +			goto err_kfree;
>> +		}
>> +	}
>> +
>> +	pctldesc->name = dev_name(chip->dev);
>> +	pctldesc->pctlops = &cygnus_pctrl_ops;
>> +	pctldesc->pins = pins;
>> +	pctldesc->npins = gc->ngpio;
>> +	pctldesc->confops = &cygnus_pconf_ops;
>> +
>> +	chip->pctl = pinctrl_register(pctldesc, chip->dev, chip);
>> +	if (!chip->pctl) {
>> +		dev_err(chip->dev, "unable to register pinctrl device\n");
>> +		ret = -EINVAL;
>> +		goto err_kfree;
>> +	}
>> +
>> +	return 0;
>> +
>> +err_kfree:
>> +	for (i = 0; i < gc->ngpio; i++)
>> +		kfree(pins[i].name);
>> +
>> +	return ret;
>> +}
>> +
>> +static void cygnus_gpio_unregister_pinconf(struct cygnus_gpio *chip)
>> +{
>> +	struct gpio_chip *gc = &chip->gc;
>> +	int i;
>> +
>> +	if (chip->pctl)
>> +		pinctrl_unregister(chip->pctl);
>> +
>> +	for (i = 0; i < gc->ngpio; i++)
>> +		kfree(chip->pins[i].name);
> 
> Should not be needed if you use devm_kasprintf.
> 
Yes!

>> +}
>> +
>> +static const struct of_device_id cygnus_gpio_of_match[] = {
>> +	{ .compatible = "brcm,cygnus-gpio" },
>> +	{ }
>> +};
>> +MODULE_DEVICE_TABLE(of, cygnus_gpio_of_match);
>> +
>> +static int cygnus_gpio_probe(struct platform_device *pdev)
>> +{
>> +	struct device *dev = &pdev->dev;
>> +	struct resource *res;
>> +	struct cygnus_gpio *chip;
>> +	struct gpio_chip *gc;
>> +	u32 ngpios;
>> +	int irq, ret;
>> +
>> +	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
>> +	if (!chip)
>> +		return -ENOMEM;
>> +
>> +	chip->dev = dev;
>> +	platform_set_drvdata(pdev, chip);
>> +
>> +	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
>> +		dev_err(dev, "missing ngpios DT property\n");
>> +		return -ENODEV;
>> +	}
>> +	chip->num_banks = (ngpios + NGPIOS_PER_BANK - 1) / NGPIOS_PER_BANK;
>> +
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +	chip->base = devm_ioremap_resource(dev, res);
>> +	if (IS_ERR(chip->base)) {
>> +		dev_err(dev, "unable to map I/O memory\n");
>> +		return PTR_ERR(chip->base);
>> +	}
>> +
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
>> +	if (res) {
>> +		chip->io_ctrl = devm_ioremap_resource(dev, res);
>> +		if (IS_ERR(chip->io_ctrl)) {
>> +			dev_err(dev, "unable to map I/O memory\n");
>> +			return PTR_ERR(chip->io_ctrl);
>> +		}
>> +	}
>> +
>> +	spin_lock_init(&chip->lock);
>> +
>> +	gc = &chip->gc;
>> +	gc->base = -1;
>> +	gc->ngpio = ngpios;
>> +	gc->label = dev_name(dev);
>> +	gc->dev = dev;
>> +	gc->of_node = dev->of_node;
>> +	gc->request = cygnus_gpio_request;
>> +	gc->free = cygnus_gpio_free;
>> +	gc->direction_input = cygnus_gpio_direction_input;
>> +	gc->direction_output = cygnus_gpio_direction_output;
>> +	gc->set = cygnus_gpio_set;
>> +	gc->get = cygnus_gpio_get;
>> +
>> +	ret = gpiochip_add(gc);
>> +	if (ret < 0) {
>> +		dev_err(dev, "unable to add GPIO chip\n");
>> +		return ret;
>> +	}
>> +
>> +	ret = cygnus_gpio_pinmux_add_range(chip);
>> +	if (ret && ret != -ENODEV) {
>> +		dev_err(dev, "unable to add GPIO pin range\n");
>> +		goto err_rm_gpiochip;
>> +	}
>> +
>> +	ret = cygnus_gpio_register_pinconf(chip);
>> +	if (ret) {
>> +		dev_err(dev, "unable to register pinconf\n");
>> +		goto err_rm_range;
>> +	}
>> +
>> +	/* optional GPIO interrupt support */
>> +	irq = platform_get_irq(pdev, 0);
>> +	if (irq) {
>> +		ret = gpiochip_irqchip_add(gc, &cygnus_gpio_irq_chip, 0,
>> +					   handle_simple_irq, IRQ_TYPE_NONE);
>> +		if (ret) {
>> +			dev_err(dev, "no GPIO irqchip\n");
>> +			goto err_unregister_pinconf;
>> +		}
>> +
>> +		gpiochip_set_chained_irqchip(gc, &cygnus_gpio_irq_chip, irq,
>> +					     cygnus_gpio_irq_handler);
>> +	}
>> +
>> +	return 0;
>> +
>> +err_unregister_pinconf:
>> +	cygnus_gpio_unregister_pinconf(chip);
>> +
>> +err_rm_range:
>> +	cygnus_gpio_pinmux_remove_range(chip);
>> +
>> +err_rm_gpiochip:
>> +	gpiochip_remove(gc);
>> +
>> +	return ret;
>> +}
>> +
>> +static struct platform_driver cygnus_gpio_driver = {
>> +	.driver = {
>> +		.name = "cygnus-gpio",
>> +		.of_match_table = cygnus_gpio_of_match,
>> +	},
>> +	.probe = cygnus_gpio_probe,
> 
> The same comment about suppress_bind_attrs.
> 
Okay. Will do!

>> +};
>> +
>> +static int __init cygnus_gpio_init(void)
>> +{
>> +	return platform_driver_probe(&cygnus_gpio_driver, cygnus_gpio_probe);
>> +}
>> +arch_initcall_sync(cygnus_gpio_init);
>> +
>> +MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
>> +MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
>> +MODULE_LICENSE("GPL v2");
>> -- 
>> 1.7.9.5
>>
> 
> Thanks.
> 
Thanks for the review, Dmitry!

Ray

[PATCH v7 3/4] ARM: dts: enable GPIO for Broadcom Cygnus

[Ray Jui]

This enables all 3 GPIO controllers including the ASIU GPIO, the
chipcommonG GPIO, and the ALWAYS-ON GPIO, for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |   33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index b014ce5..a3b8621 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -60,6 +60,39 @@
 		      <0x0301d24c 0x2c>;
 	};
 
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>,
+		      <0x03024008 0x18>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+	};
+
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x1800a000 0x50>,
+		      <0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <146>;
+		#gpio-cells = <2>;
+		gpio-controller;
+
+		pinmux = <&pinctrl>;
+
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v7 4/4] ARM: dts: cygnus: enable GPIO based hook detection

[Ray Jui]

This enables GPIO based phone hook detection for Broadcom BCM911360
phone factor board (bcm911360_entphn)

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 arch/arm/boot/dts/bcm911360_entphn.dts |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/bcm911360_entphn.dts b/arch/arm/boot/dts/bcm911360_entphn.dts
index d2ee952..7db4843 100644
--- a/arch/arm/boot/dts/bcm911360_entphn.dts
+++ b/arch/arm/boot/dts/bcm911360_entphn.dts
@@ -33,6 +33,7 @@
 /dts-v1/;
 
 #include "bcm-cygnus.dtsi"
+#include "dt-bindings/input/input.h"
 
 / {
 	model = "Cygnus Enterprise Phone (BCM911360_ENTPHN)";
@@ -50,4 +51,16 @@
 	uart3: serial@18023000 {
 		status = "okay";
 	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hook {
+			label = "HOOK";
+			linux,code = <KEY_O>;
+			gpios = <&gpio_asiu 48 0>;
+		};
+	};
 };
-- 
1.7.9.5

[PATCH 0/5] Add gpio support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the same Cygnus GPIO driver

Ray Jui (5):
  gpio: Cygnus: define Broadcom Cygnus GPIO binding
  gpio: Cygnus: add GPIO driver
  ARM: mach-bcm: Enable GPIO support for Cygnus
  ARM: dts: enable GPIO for Broadcom Cygnus
  MAINTAINERS: Entry for Cygnus GPIO driver

 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   85 +++
 MAINTAINERS                                        |    7 +
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   30 +
 arch/arm/mach-bcm/Kconfig                          |    1 +
 drivers/gpio/Kconfig                               |   11 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/gpio-bcm-cygnus.c                     |  719 ++++++++++++++++++++
 7 files changed, 854 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

-- 
1.7.9.5

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[PATCH 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

Document the GPIO device tree binding for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   85 ++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt

diff --git a/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
new file mode 100644
index 0000000..24a1513
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
@@ -0,0 +1,85 @@
+Broadcom Cygnus GPIO Controller
+
+Required properties:
+
+- compatible:
+    Currently supported Cygnus GPIO controllers include:
+    "brcm,cygnus-ccm-gpio": ChipcommonG GPIO controller
+    "brcm,cygnus-asiu-gpio": ASIU GPIO controller
+    "brcm,cygnus-crmu-gpio": CRMU GPIO controller
+
+- reg:
+    Define the base and range of the I/O address space that contain the Cygnus
+GPIO controller registers
+
+- ngpios:
+    Total number of GPIOs the controller provides
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's domain) and the second cell is used for the following:
+    bit[0]: polarity (0 for normal and 1 for inverted)
+    bit[18:16]: internal pull up/down: 0 - pull up/down disabled
+                                       1 - pull up enabled
+                                       2 - pull down enabled
+    bit[22:20]: drive strength: 0 - 2 mA
+                                1 - 4 mA
+                                2 - 6 mA
+                                3 - 8 mA
+                                4 - 10 mA
+                                5 - 12 mA
+                                6 - 14 mA
+                                7 - 16 mA
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller. Not all Cygnus GPIO
+interfaces support interrupt, e.g., the CRMU GPIO controller does not have its
+interrupt routed to the main processor's GIC
+
+- interrupts:
+    The interrupt outputs from the GPIO controller.
+
+- no-interrupt:
+    Specifies that the GPIO interface does not support interrupt
+
+Example:
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-asiu-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-crmu-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-interrupt;
+	};
+
+	/*
+	 * Touchscreen that uses the ASIU GPIO 100, with internal pull-up
+	 * enabled
+	 */
+	tsc {
+		...
+		...
+		gpio-event = <&gpio_asiu 100 0x10000>;
+	};
+
+	/* Bluetooth that uses the CRMU GPIO 2, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_crmu 2 1>
+	}
-- 
1.7.9.5

Re: [PATCH 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Linus Walleij]

On Sat, Dec 6, 2014 at 1:40 AM, Ray Jui <rjui@broadcom.com> wrote:

> Document the GPIO device tree binding for Broadcom Cygnus SoC
>
> Signed-off-by: Ray Jui <rjui@broadcom.com>
> Reviewed-by: Scott Branden <sbranden@broadcom.com>
(...)
> +- #gpio-cells:
> +    Must be two. The first cell is the GPIO pin number (within the
> +controller's domain) and the second cell is used for the following:
> +    bit[0]: polarity (0 for normal and 1 for inverted)
> +    bit[18:16]: internal pull up/down: 0 - pull up/down disabled
> +                                       1 - pull up enabled
> +                                       2 - pull down enabled
> +    bit[22:20]: drive strength: 0 - 2 mA
> +                                1 - 4 mA
> +                                2 - 6 mA
> +                                3 - 8 mA
> +                                4 - 10 mA
> +                                5 - 12 mA
> +                                6 - 14 mA
> +                                7 - 16 mA

No. This pull up/down and drive strength is pin controller
business, use a pin control backend behind the GPIO driver
see Documentation/pinctrl.txt.

Initial states for these configurations can be set up using
pin control hogs since pin control and GPIO is orthogonal.

Yours,
Linus Walleij

Re: [PATCH 1/5] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

On 1/12/2015 11:57 PM, Linus Walleij wrote:
> On Sat, Dec 6, 2014 at 1:40 AM, Ray Jui <rjui@broadcom.com> wrote:
> 
>> Document the GPIO device tree binding for Broadcom Cygnus SoC
>>
>> Signed-off-by: Ray Jui <rjui@broadcom.com>
>> Reviewed-by: Scott Branden <sbranden@broadcom.com>
> (...)
>> +- #gpio-cells:
>> +    Must be two. The first cell is the GPIO pin number (within the
>> +controller's domain) and the second cell is used for the following:
>> +    bit[0]: polarity (0 for normal and 1 for inverted)
>> +    bit[18:16]: internal pull up/down: 0 - pull up/down disabled
>> +                                       1 - pull up enabled
>> +                                       2 - pull down enabled
>> +    bit[22:20]: drive strength: 0 - 2 mA
>> +                                1 - 4 mA
>> +                                2 - 6 mA
>> +                                3 - 8 mA
>> +                                4 - 10 mA
>> +                                5 - 12 mA
>> +                                6 - 14 mA
>> +                                7 - 16 mA
> 
> No. This pull up/down and drive strength is pin controller
> business, use a pin control backend behind the GPIO driver
> see Documentation/pinctrl.txt.
> 
> Initial states for these configurations can be set up using
> pin control hogs since pin control and GPIO is orthogonal.
> 
Yes, I got it! See my reply in the GPIO driver review. Thanks.

> Yours,
> Linus Walleij
> 

[PATCH 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller
("brcm,cygnus-asiu-gpio"), 2) the chipCommonG GPIO controller
("brcm,cygnus-ccm-gpio"), and 3) the ALWAYS-ON GPIO controller
("brcm,cygnus-crmu-gpio")

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/gpio/Kconfig           |   11 +
 drivers/gpio/Makefile          |    1 +
 drivers/gpio/gpio-bcm-cygnus.c |  719 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 731 insertions(+)
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 633ec21..3e3b0342 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -126,6 +126,17 @@ config GPIO_74XX_MMIO
 	    8 bits:	74244 (Input), 74273 (Output)
 	    16 bits:	741624 (Input), 7416374 (Output)
 
+config GPIO_BCM_CYGNUS
+	bool "Broadcom Cygnus GPIO support"
+	depends on ARCH_BCM_CYGNUS && OF_GPIO
+	help
+	  Say yes here to turn on GPIO support for Broadcom Cygnus SoC
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU). All 3 GPIO controllers are
+	  supported by this driver
+
 config GPIO_CLPS711X
 	tristate "CLPS711X GPIO support"
 	depends on ARCH_CLPS711X || COMPILE_TEST
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 81755f1..31eb7e0 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5520)	+= gpio-adp5520.o
 obj-$(CONFIG_GPIO_ADP5588)	+= gpio-adp5588.o
 obj-$(CONFIG_GPIO_AMD8111)	+= gpio-amd8111.o
 obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizona.o
+obj-$(CONFIG_GPIO_BCM_CYGNUS)	+= gpio-bcm-cygnus.o
 obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
 obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
 obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
new file mode 100644
index 0000000..1549ea8
--- /dev/null
+++ b/drivers/gpio/gpio-bcm-cygnus.c
@@ -0,0 +1,719 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/irqchip/chained_irq.h>
+
+#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
+#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
+#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
+#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
+#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
+#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
+#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
+#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
+#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
+#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
+#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
+#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
+
+/* drive strength control for ASIU GPIO */
+#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+
+/* drive strength control for CCM GPIO */
+#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
+
+#define GPIO_BANK_SIZE 0x200
+#define NGPIOS_PER_BANK 32
+#define GPIO_BIT(pin) ((pin) % NGPIOS_PER_BANK)
+#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
+
+#define GPIO_FLAG_BIT_MASK           0xffff
+#define GPIO_PULL_BIT_SHIFT          16
+#define GPIO_PULL_BIT_MASK           0x3
+
+#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
+#define GPIO_DRV_STRENGTH_BITS       3
+#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
+
+/*
+ * For GPIO internal pull up/down registers
+ */
+enum gpio_pull {
+	GPIO_PULL_NONE = 0,
+	GPIO_PULL_UP,
+	GPIO_PULL_DOWN,
+	GPIO_PULL_INVALID,
+};
+
+/*
+ * GPIO drive strength
+ */
+enum gpio_drv_strength {
+	GPIO_DRV_STRENGTH_2MA = 0,
+	GPIO_DRV_STRENGTH_4MA,
+	GPIO_DRV_STRENGTH_6MA,
+	GPIO_DRV_STRENGTH_8MA,
+	GPIO_DRV_STRENGTH_10MA,
+	GPIO_DRV_STRENGTH_12MA,
+	GPIO_DRV_STRENGTH_14MA,
+	GPIO_DRV_STRENGTH_16MA,
+	GPIO_DRV_STRENGTH_INVALID,
+};
+
+struct bcm_cygnus_gpio {
+	struct device *dev;
+	void __iomem *base;
+	void __iomem *io_ctrl;
+	spinlock_t lock;
+	struct gpio_chip gc;
+	unsigned num_banks;
+	int irq;
+	struct irq_domain *irq_domain;
+};
+
+static unsigned int gpio_base_index;
+
+static inline struct bcm_cygnus_gpio *to_bcm_cygnus_gpio(
+		struct gpio_chip *gc)
+{
+	return container_of(gc, struct bcm_cygnus_gpio, gc);
+}
+
+static inline int bcm_cygnus_gpio_to_irq(struct gpio_chip *gc,
+		unsigned offset)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+
+	return irq_find_mapping(cygnus_gpio->irq_domain, offset);
+}
+
+static inline unsigned int __gpio_reg_offset(
+		struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio)
+{
+	return GPIO_BANK(gpio) * GPIO_BANK_SIZE;
+}
+
+static inline unsigned int __gpio_bitpos(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio)
+{
+	return GPIO_BIT(gpio);
+}
+
+static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
+		struct irq_desc *desc)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio;
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int i, bit;
+
+	chained_irq_enter(chip, desc);
+
+	cygnus_gpio = irq_get_handler_data(irq);
+
+	/* go through the entire GPIO banks and handle all interrupts */
+	for (i = 0; i < cygnus_gpio->num_banks; i++) {
+		unsigned long val = readl(cygnus_gpio->base +
+				(i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_MSTAT_OFFSET);
+		if (val) {
+			for_each_set_bit(bit, &val, 32) {
+				unsigned pin = NGPIOS_PER_BANK * i + bit;
+				int child_irq =	bcm_cygnus_gpio_to_irq(
+						&cygnus_gpio->gc, pin);
+
+				/*
+				 * Clear the interrupt before invoking the
+				 * handler, so we do not leave any window
+				 */
+				writel(1 << bit,
+					cygnus_gpio->base +
+					(i * GPIO_BANK_SIZE) +
+					CYGNUS_GPIO_INT_CLR_OFFSET);
+
+				generic_handle_irq(child_irq);
+			}
+
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+static void bcm_cygnus_gpio_irq_ack(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_CLR_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static void bcm_cygnus_gpio_irq_mask(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_MSK_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static void bcm_cygnus_gpio_irq_unmask(struct irq_data *d)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_MSK_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+}
+
+static int bcm_cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int int_type, dual_edge, edge_lvl;
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		int_type = 0;
+		dual_edge = 0;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		int_type = 0;
+		dual_edge = 0;
+		edge_lvl = 0;
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		int_type = 0;
+		dual_edge = 1;
+		edge_lvl = 0;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		int_type = 1;
+		dual_edge = 0;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		int_type = 1;
+		dual_edge = 0;
+		edge_lvl = 0;
+		break;
+
+	default:
+		dev_err(cygnus_gpio->dev, "invalid GPIO irq type 0x%x\n", type);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_IN_TYPE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= int_type << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_DE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= dual_edge << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_INT_EDGE_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	val |= edge_lvl << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	return 0;
+}
+
+static struct irq_chip bcm_cygnus_gpio_irq_chip = {
+	.name = "bcm-cygnus-gpio",
+	.irq_ack = bcm_cygnus_gpio_irq_ack,
+	.irq_mask = bcm_cygnus_gpio_irq_mask,
+	.irq_unmask = bcm_cygnus_gpio_irq_unmask,
+	.irq_set_type = bcm_cygnus_gpio_irq_set_type,
+};
+
+static int bcm_cygnus_gpio_direction_input(struct gpio_chip *gc,
+		unsigned gpio)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_OUT_EN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+
+	return 0;
+}
+
+static int bcm_cygnus_gpio_direction_output(struct gpio_chip *gc,
+		unsigned gpio, int value)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_OUT_EN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
+			offset, shift);
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_OUT_OFFSET;
+
+	val = readl(cygnus_gpio->base + offset);
+	if (value)
+		val |= 1 << shift;
+	else
+		val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
+		gpio, offset, shift, val);
+
+	return 0;
+}
+
+static void bcm_cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio,
+		int value)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_OUT_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	val = readl(cygnus_gpio->base + offset);
+	if (value)
+		val |= 1 << shift;
+	else
+		val &= ~(1 << shift);
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u offset:0x%04x shift:%u val:0x%08x\n",
+		gpio, offset, shift, val);
+}
+
+static int bcm_cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	unsigned int offset, shift;
+	u32 val;
+
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_DATA_IN_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = readl(cygnus_gpio->base + offset);
+	val = (val >> shift) & 1;
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u val:%u\n",
+			gpio, offset, shift, val);
+
+	return val;
+}
+
+static struct lock_class_key gpio_lock_class;
+
+static int bcm_cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+				 irq_hw_number_t hwirq)
+{
+	int ret;
+
+	ret = irq_set_chip_data(irq, d->host_data);
+	if (ret < 0)
+		return ret;
+	irq_set_lockdep_class(irq, &gpio_lock_class);
+	irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
+			handle_simple_irq);
+	set_irq_flags(irq, IRQF_VALID);
+
+	return 0;
+}
+
+static void bcm_cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static struct irq_domain_ops bcm_cygnus_irq_ops = {
+	.map = bcm_cygnus_gpio_irq_map,
+	.unmap = bcm_cygnus_gpio_irq_unmap,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+#ifdef CONFIG_OF_GPIO
+static void bcm_cygnus_gpio_set_pull(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_pull pull)
+{
+	unsigned int offset, shift;
+	u32 val, up;
+	unsigned long flags;
+
+	switch (pull) {
+	case GPIO_PULL_NONE:
+		return;
+	case GPIO_PULL_UP:
+		up = 1;
+		break;
+	case GPIO_PULL_DOWN:
+		up = 0;
+		break;
+	case GPIO_PULL_INVALID:
+	default:
+		return;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	/* set pull up/down */
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_PAD_RES_OFFSET;
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	val = readl(cygnus_gpio->base + offset);
+	val &= ~(1 << shift);
+	if (up)
+		val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	/* enable pad */
+	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+		CYGNUS_GPIO_RES_EN_OFFSET;
+	val = readl(cygnus_gpio->base + offset);
+	val |= 1 << shift;
+	writel(val, cygnus_gpio->base + offset);
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static void bcm_cygnus_gpio_set_strength(struct bcm_cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_drv_strength strength)
+{
+	struct device *dev = cygnus_gpio->dev;
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	if (of_device_is_compatible(dev->of_node, "brcm,cygnus-asiu-gpio")) {
+		base = cygnus_gpio->base;
+		offset = __gpio_reg_offset(cygnus_gpio, gpio) +
+			CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET;
+	} else if (of_device_is_compatible(dev->of_node,
+			"brcm,cygnus-ccm-gpio")) {
+		if (!cygnus_gpio->io_ctrl)
+			return;
+
+		base = cygnus_gpio->io_ctrl;
+		offset = CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET;
+	} else
+		return;
+
+	shift = __gpio_bitpos(cygnus_gpio, gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset);
+		val &= ~(1 << shift);
+		val |= ((strength >> i) & 0x1) << shift;
+		writel(val, base + offset);
+		offset += 4;
+	}
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static int bcm_cygnus_gpio_of_xlate(struct gpio_chip *gc,
+		const struct of_phandle_args *gpiospec, u32 *flags)
+{
+	struct bcm_cygnus_gpio *cygnus_gpio = to_bcm_cygnus_gpio(gc);
+	enum gpio_pull pull;
+	enum gpio_drv_strength strength;
+
+	if (gc->of_gpio_n_cells < 2)
+		return -EINVAL;
+
+	if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+		return -EINVAL;
+
+	if (gpiospec->args[0] >= gc->ngpio)
+		return -EINVAL;
+
+	pull = (gpiospec->args[1] >> GPIO_PULL_BIT_SHIFT) & GPIO_PULL_BIT_MASK;
+	if (WARN_ON(pull >= GPIO_PULL_INVALID))
+		return -EINVAL;
+
+	strength = (gpiospec->args[1] >> GPIO_DRV_STRENGTH_BIT_SHIFT) &
+		GPIO_DRV_STRENGTH_BIT_MASK;
+
+	if (flags)
+		*flags = gpiospec->args[1] & GPIO_FLAG_BIT_MASK;
+
+	bcm_cygnus_gpio_set_pull(cygnus_gpio, gpiospec->args[0], pull);
+	bcm_cygnus_gpio_set_strength(cygnus_gpio, gpiospec->args[0], strength);
+
+	return gpiospec->args[0];
+}
+#endif
+
+static const struct of_device_id bcm_cygnus_gpio_of_match[] = {
+	{ .compatible = "brcm,cygnus-crmu-gpio" },
+	{ .compatible = "brcm,cygnus-asiu-gpio" },
+	{ .compatible = "brcm,cygnus-ccm-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, bcm_cygnus_gpio_of_match);
+
+static int bcm_cygnus_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *match;
+	struct resource *res;
+	struct bcm_cygnus_gpio *cygnus_gpio;
+	struct gpio_chip *gc;
+	u32 i, ngpios;
+	int ret;
+
+	match = of_match_device(bcm_cygnus_gpio_of_match, dev);
+	if (!match) {
+		dev_err(&pdev->dev, "failed to find GPIO controller\n");
+		return -ENODEV;
+	}
+
+	cygnus_gpio = devm_kzalloc(dev, sizeof(*cygnus_gpio), GFP_KERNEL);
+	if (!cygnus_gpio)
+		return -ENOMEM;
+
+	cygnus_gpio->dev = dev;
+	platform_set_drvdata(pdev, cygnus_gpio);
+
+	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+		dev_err(&pdev->dev, "missing ngpios device tree property\n");
+		return -ENODEV;
+	}
+	cygnus_gpio->num_banks = (ngpios + NGPIOS_PER_BANK - 1) /
+		NGPIOS_PER_BANK;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "unable to get I/O resource");
+		return -ENODEV;
+	}
+
+	cygnus_gpio->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(cygnus_gpio->base)) {
+		dev_err(&pdev->dev, "unable to map I/O memory\n");
+		return PTR_ERR(cygnus_gpio->base);
+	}
+
+	/*
+	 * Only certain types of Cygnus GPIO interfaces have I/O control
+	 * registers
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		cygnus_gpio->io_ctrl = devm_ioremap_resource(dev, res);
+		if (IS_ERR(cygnus_gpio->io_ctrl)) {
+			dev_err(&pdev->dev, "unable to map I/O memory\n");
+			return PTR_ERR(cygnus_gpio->io_ctrl);
+		}
+	}
+
+	spin_lock_init(&cygnus_gpio->lock);
+
+	gc = &cygnus_gpio->gc;
+	gc->base = gpio_base_index;
+	gpio_base_index += ngpios;
+	gc->ngpio = ngpios;
+	gc->label = dev_name(dev);
+	gc->dev = dev;
+#ifdef CONFIG_OF_GPIO
+	gc->of_node = dev->of_node;
+	gc->of_gpio_n_cells = 2;
+	gc->of_xlate = bcm_cygnus_gpio_of_xlate;
+#endif
+	gc->direction_input = bcm_cygnus_gpio_direction_input;
+	gc->direction_output = bcm_cygnus_gpio_direction_output;
+	gc->set = bcm_cygnus_gpio_set;
+	gc->get = bcm_cygnus_gpio_get;
+	gc->to_irq = bcm_cygnus_gpio_to_irq;
+
+	ret = gpiochip_add(gc);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "unable to add GPIO chip\n");
+		goto err_dec_gpio_base;
+	}
+
+	/*
+	 * Some of the GPIO interfaces do not have interrupt wired to the main
+	 * processor
+	 */
+	if (of_find_property(dev->of_node, "no-interrupt", NULL))
+		return 0;
+
+	cygnus_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
+			gc->ngpio, &bcm_cygnus_irq_ops, cygnus_gpio);
+	if (!cygnus_gpio->irq_domain) {
+		dev_err(&pdev->dev, "unable to allocate IRQ domain\n");
+		ret = -ENXIO;
+		goto err_rm_gpiochip;
+	}
+
+	cygnus_gpio->irq = platform_get_irq(pdev, 0);
+	if (cygnus_gpio->irq < 0) {
+		dev_err(&pdev->dev, "unable to get IRQ\n");
+		ret = cygnus_gpio->irq;
+		goto err_rm_irq_domain;
+	}
+
+	for (i = 0; i < gc->ngpio; i++) {
+		int irq = irq_create_mapping(cygnus_gpio->irq_domain, i);
+
+		irq_set_lockdep_class(irq, &gpio_lock_class);
+		irq_set_chip_data(irq, cygnus_gpio);
+		irq_set_chip_and_handler(irq, &bcm_cygnus_gpio_irq_chip,
+				handle_simple_irq);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	irq_set_chained_handler(cygnus_gpio->irq, bcm_cygnus_gpio_irq_handler);
+	irq_set_handler_data(cygnus_gpio->irq, cygnus_gpio);
+
+	return 0;
+
+err_rm_irq_domain:
+	irq_domain_remove(cygnus_gpio->irq_domain);
+
+err_rm_gpiochip:
+	gpiochip_remove(gc);
+
+err_dec_gpio_base:
+	gpio_base_index -= ngpios;
+	return ret;
+}
+
+static struct platform_driver bcm_cygnus_gpio_driver = {
+	.driver = {
+		.name = "bcm-cygnus-gpio",
+		.owner = THIS_MODULE,
+		.of_match_table = bcm_cygnus_gpio_of_match,
+	},
+	.probe = bcm_cygnus_gpio_probe,
+};
+
+module_platform_driver(bcm_cygnus_gpio_driver);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

Re: [PATCH 2/5] gpio: Cygnus: add GPIO driver

[Joe Perches]

On Fri, 2014-12-05 at 16:40 -0800, Ray Jui wrote:
> This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
> SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller
> ("brcm,cygnus-asiu-gpio"), 2) the chipCommonG GPIO controller
> ("brcm,cygnus-ccm-gpio"), and 3) the ALWAYS-ON GPIO controller
> ("brcm,cygnus-crmu-gpio")

trivia:

> diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c

> +static inline struct bcm_cygnus_gpio *to_bcm_cygnus_gpio(
> +		struct gpio_chip *gc)
> +{
> +	return container_of(gc, struct bcm_cygnus_gpio, gc);
> +}

Probably all of these inlines can just be static.

The compiler does a pretty good job these days
of inlining where appropriate.


> +static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
> +		struct irq_desc *desc)
> +{
> +	struct bcm_cygnus_gpio *cygnus_gpio;
> +	struct irq_chip *chip = irq_desc_get_chip(desc);
> +	int i, bit;
> +
> +	chained_irq_enter(chip, desc);
> +
> +	cygnus_gpio = irq_get_handler_data(irq);
> +
> +	/* go through the entire GPIO banks and handle all interrupts */
> +	for (i = 0; i < cygnus_gpio->num_banks; i++) {
> +		unsigned long val = readl(cygnus_gpio->base +
> +				(i * GPIO_BANK_SIZE) +
> +				CYGNUS_GPIO_INT_MSTAT_OFFSET);
> +		if (val) {

This if (val) and indentation isn't really necessary

> +			for_each_set_bit(bit, &val, 32) {

for_each_set_bit will effectively do the if above.

32 bit only code?
otherwise isn't this endian unsafe?

> +				unsigned pin = NGPIOS_PER_BANK * i + bit;
> +				int child_irq =	bcm_cygnus_gpio_to_irq(
> +						&cygnus_gpio->gc, pin);
> +
> +				/*
> +				 * Clear the interrupt before invoking the
> +				 * handler, so we do not leave any window
> +				 */
> +				writel(1 << bit,
> +					cygnus_gpio->base +
> +					(i * GPIO_BANK_SIZE) +
> +					CYGNUS_GPIO_INT_CLR_OFFSET);
> +
> +				generic_handle_irq(child_irq);
> +			}
> +
> +		}
> +	}
> +
> +	chained_irq_exit(chip, desc);
> +}
> +
> +static void bcm_cygnus_gpio_irq_ack(struct irq_data *d)
> +{
> +	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
> +	unsigned gpio = d->hwirq;
> +	unsigned int offset, shift;
> +	u32 val;
> +
> +	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
> +		CYGNUS_GPIO_INT_CLR_OFFSET;
> +	shift = __gpio_bitpos(cygnus_gpio, gpio);
> +
> +	val = 1 << shift;
> +	writel(val, cygnus_gpio->base + offset);
> +
> +	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
> +			offset, shift);
> +}

> +static struct irq_chip bcm_cygnus_gpio_irq_chip = {
> +	.name = "bcm-cygnus-gpio",
> +	.irq_ack = bcm_cygnus_gpio_irq_ack,
> +	.irq_mask = bcm_cygnus_gpio_irq_mask,
> +	.irq_unmask = bcm_cygnus_gpio_irq_unmask,
> +	.irq_set_type = bcm_cygnus_gpio_irq_set_type,
> +};

const?

> +static struct irq_domain_ops bcm_cygnus_irq_ops = {
> +	.map = bcm_cygnus_gpio_irq_map,
> +	.unmap = bcm_cygnus_gpio_irq_unmap,
> +	.xlate = irq_domain_xlate_twocell,
> +};

const here too?

> +#ifdef CONFIG_OF_GPIO
> +static void bcm_cygnus_gpio_set_pull(struct bcm_cygnus_gpio *cygnus_gpio,
> +		unsigned gpio, enum gpio_pull pull)
> +{
> +	unsigned int offset, shift;
> +	u32 val, up;

	bool up; ?

> +	unsigned long flags;
> +
> +	switch (pull) {
> +	case GPIO_PULL_NONE:
> +		return;
> +	case GPIO_PULL_UP:
> +		up = 1;
> +		break;
> +	case GPIO_PULL_DOWN:
> +		up = 0;
> +		break;
> +	case GPIO_PULL_INVALID:
> +	default:
> +		return;
> +	}

Maybe more sensible to group GPIO_PULL_NONE with GPIO_PULL_INVALID


> +static int bcm_cygnus_gpio_probe(struct platform_device *pdev)
> +{
[]
> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +	if (!res) {
> +		dev_err(&pdev->dev, "unable to get I/O resource");

missing newline


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Re: [PATCH 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

Thanks for your review, Joe:

On 12/5/2014 5:28 PM, Joe Perches wrote:
> On Fri, 2014-12-05 at 16:40 -0800, Ray Jui wrote:
>> This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
>> SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller
>> ("brcm,cygnus-asiu-gpio"), 2) the chipCommonG GPIO controller
>> ("brcm,cygnus-ccm-gpio"), and 3) the ALWAYS-ON GPIO controller
>> ("brcm,cygnus-crmu-gpio")
>
> trivia:
>
>> diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
>
>> +static inline struct bcm_cygnus_gpio *to_bcm_cygnus_gpio(
>> +		struct gpio_chip *gc)
>> +{
>> +	return container_of(gc, struct bcm_cygnus_gpio, gc);
>> +}
>
> Probably all of these inlines can just be static.
>
> The compiler does a pretty good job these days
> of inlining where appropriate.

Okay I can remove all inlines.

>
>
>> +static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
>> +		struct irq_desc *desc)
>> +{
>> +	struct bcm_cygnus_gpio *cygnus_gpio;
>> +	struct irq_chip *chip = irq_desc_get_chip(desc);
>> +	int i, bit;
>> +
>> +	chained_irq_enter(chip, desc);
>> +
>> +	cygnus_gpio = irq_get_handler_data(irq);
>> +
>> +	/* go through the entire GPIO banks and handle all interrupts */
>> +	for (i = 0; i < cygnus_gpio->num_banks; i++) {
>> +		unsigned long val = readl(cygnus_gpio->base +
>> +				(i * GPIO_BANK_SIZE) +
>> +				CYGNUS_GPIO_INT_MSTAT_OFFSET);
>> +		if (val) {
>
> This if (val) and indentation isn't really necessary
>

Note for_each_set_bit in this case iterates 32 times searching for bits 
that are set. By having the if (val) check here, it can potentially save 
some of such processing in the ISR. I agree with you that it introduces 
one extra indent here but I think it's required.

>> +			for_each_set_bit(bit, &val, 32) {
>
> for_each_set_bit will effectively do the if above.
>
> 32 bit only code?
> otherwise isn't this endian unsafe?
>

Will change 'unsigned long val' to 'u32 val'.

>> +				unsigned pin = NGPIOS_PER_BANK * i + bit;
>> +				int child_irq =	bcm_cygnus_gpio_to_irq(
>> +						&cygnus_gpio->gc, pin);
>> +
>> +				/*
>> +				 * Clear the interrupt before invoking the
>> +				 * handler, so we do not leave any window
>> +				 */
>> +				writel(1 << bit,
>> +					cygnus_gpio->base +
>> +					(i * GPIO_BANK_SIZE) +
>> +					CYGNUS_GPIO_INT_CLR_OFFSET);
>> +
>> +				generic_handle_irq(child_irq);
>> +			}
>> +
>> +		}
>> +	}
>> +
>> +	chained_irq_exit(chip, desc);
>> +}
>> +
>> +static void bcm_cygnus_gpio_irq_ack(struct irq_data *d)
>> +{
>> +	struct bcm_cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
>> +	unsigned gpio = d->hwirq;
>> +	unsigned int offset, shift;
>> +	u32 val;
>> +
>> +	offset = __gpio_reg_offset(cygnus_gpio, gpio) +
>> +		CYGNUS_GPIO_INT_CLR_OFFSET;
>> +	shift = __gpio_bitpos(cygnus_gpio, gpio);
>> +
>> +	val = 1 << shift;
>> +	writel(val, cygnus_gpio->base + offset);
>> +
>> +	dev_dbg(cygnus_gpio->dev, "gpio:%u offset:0x%04x shift:%u\n", gpio,
>> +			offset, shift);
>> +}
>
>> +static struct irq_chip bcm_cygnus_gpio_irq_chip = {
>> +	.name = "bcm-cygnus-gpio",
>> +	.irq_ack = bcm_cygnus_gpio_irq_ack,
>> +	.irq_mask = bcm_cygnus_gpio_irq_mask,
>> +	.irq_unmask = bcm_cygnus_gpio_irq_unmask,
>> +	.irq_set_type = bcm_cygnus_gpio_irq_set_type,
>> +};
>
> const?
>


Sure, will add const to bcm_cygnus_gpio_irq_chip

>> +static struct irq_domain_ops bcm_cygnus_irq_ops = {
>> +	.map = bcm_cygnus_gpio_irq_map,
>> +	.unmap = bcm_cygnus_gpio_irq_unmap,
>> +	.xlate = irq_domain_xlate_twocell,
>> +};
>
> const here too?
>

Yes, will make bcm_cygnus_irq_ops const.

>> +#ifdef CONFIG_OF_GPIO
>> +static void bcm_cygnus_gpio_set_pull(struct bcm_cygnus_gpio *cygnus_gpio,
>> +		unsigned gpio, enum gpio_pull pull)
>> +{
>> +	unsigned int offset, shift;
>> +	u32 val, up;
>
> 	bool up; ?
>

Okay I'll change the name from 'up' to 'pullup' to make it more readable.

>> +	unsigned long flags;
>> +
>> +	switch (pull) {
>> +	case GPIO_PULL_NONE:
>> +		return;
>> +	case GPIO_PULL_UP:
>> +		up = 1;
>> +		break;
>> +	case GPIO_PULL_DOWN:
>> +		up = 0;
>> +		break;
>> +	case GPIO_PULL_INVALID:
>> +	default:
>> +		return;
>> +	}
>
> Maybe more sensible to group GPIO_PULL_NONE with GPIO_PULL_INVALID
>
>

Good suggestion, will do the following:

case GPIO_PULL_NONE:
case GPIO_PULL_INVALID:
default:
        return;

>> +static int bcm_cygnus_gpio_probe(struct platform_device *pdev)
>> +{
> []
>> +	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +	if (!res) {
>> +		dev_err(&pdev->dev, "unable to get I/O resource");
>
> missing newline
>
>

Right, will fix it with dev_err(&pdev->dev, "unable to get I/O resource\n");

Re: [PATCH 2/5] gpio: Cygnus: add GPIO driver

[Joe Perches]

On Fri, 2014-12-05 at 18:14 -0800, Ray Jui wrote:
> On 12/5/2014 5:28 PM, Joe Perches wrote:
> > On Fri, 2014-12-05 at 16:40 -0800, Ray Jui wrote:
> >> +static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
> >> +		struct irq_desc *desc)
> >> +{
> >> +	struct bcm_cygnus_gpio *cygnus_gpio;
> >> +	struct irq_chip *chip = irq_desc_get_chip(desc);
> >> +	int i, bit;
> >> +
> >> +	chained_irq_enter(chip, desc);
> >> +
> >> +	cygnus_gpio = irq_get_handler_data(irq);
> >> +
> >> +	/* go through the entire GPIO banks and handle all interrupts */
> >> +	for (i = 0; i < cygnus_gpio->num_banks; i++) {
> >> +		unsigned long val = readl(cygnus_gpio->base +
> >> +				(i * GPIO_BANK_SIZE) +
> >> +				CYGNUS_GPIO_INT_MSTAT_OFFSET);
> >> +		if (val) {
> >
> > This if (val) and indentation isn't really necessary
> >
> 
> Note for_each_set_bit in this case iterates 32 times searching for bits 
> that are set.

No it doesn't.

#define for_each_set_bit(bit, addr, size) \
	for ((bit) = find_first_bit((addr), (size));		\
	     (bit) < (size);					\
	     (bit) = find_next_bit((addr), (size), (bit) + 1))

find_first_bit:

 * Returns the bit number of the first set bit.
 * If no bits are set, returns @size.

>  By having the if (val) check here, it can potentially save 
> some of such processing in the ISR. I agree with you that it introduces 
> one extra indent here but I think it's required.
> 
> >> +			for_each_set_bit(bit, &val, 32) {
> >
> > for_each_set_bit will effectively do the if above.
> >
> > 32 bit only code?
> > otherwise isn't this endian unsafe?
> >
> 
> Will change 'unsigned long val' to 'u32 val'.

All the bit operations only work on long *

Re: [PATCH 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

On 12/5/2014 6:34 PM, Joe Perches wrote:
> On Fri, 2014-12-05 at 18:14 -0800, Ray Jui wrote:
>> On 12/5/2014 5:28 PM, Joe Perches wrote:
>>> On Fri, 2014-12-05 at 16:40 -0800, Ray Jui wrote:
>>>> +static void bcm_cygnus_gpio_irq_handler(unsigned int irq,
>>>> +		struct irq_desc *desc)
>>>> +{
>>>> +	struct bcm_cygnus_gpio *cygnus_gpio;
>>>> +	struct irq_chip *chip = irq_desc_get_chip(desc);
>>>> +	int i, bit;
>>>> +
>>>> +	chained_irq_enter(chip, desc);
>>>> +
>>>> +	cygnus_gpio = irq_get_handler_data(irq);
>>>> +
>>>> +	/* go through the entire GPIO banks and handle all interrupts */
>>>> +	for (i = 0; i < cygnus_gpio->num_banks; i++) {
>>>> +		unsigned long val = readl(cygnus_gpio->base +
>>>> +				(i * GPIO_BANK_SIZE) +
>>>> +				CYGNUS_GPIO_INT_MSTAT_OFFSET);
>>>> +		if (val) {
>>>
>>> This if (val) and indentation isn't really necessary
>>>
>>
>> Note for_each_set_bit in this case iterates 32 times searching for bits
>> that are set.
>
> No it doesn't.
>
> #define for_each_set_bit(bit, addr, size) \
> 	for ((bit) = find_first_bit((addr), (size));		\
> 	     (bit) < (size);					\
> 	     (bit) = find_next_bit((addr), (size), (bit) + 1))
>
> find_first_bit:
>
>   * Returns the bit number of the first set bit.
>   * If no bits are set, returns @size.
>

You are right. I reviewed for_each_set_bit but didn't notice 
find_next_bit may simply return 32 in our case without doing any 
iterative processing. I will get rid of the redundant if (val) check below.

>>   By having the if (val) check here, it can potentially save
>> some of such processing in the ISR. I agree with you that it introduces
>> one extra indent here but I think it's required.
>>
>>>> +			for_each_set_bit(bit, &val, 32) {
>>>
>>> for_each_set_bit will effectively do the if above.
>>>
>>> 32 bit only code?
>>> otherwise isn't this endian unsafe?
>>>
>>
>> Will change 'unsigned long val' to 'u32 val'.
>
> All the bit operations only work on long *
>
>

Actually, by reviewing the code more deeply, I'm not sure why using 
for_each_set_bit here is 'endian unsafe'. Isn't that already taken care 
of by macros in bitops.h? Sorry if I'm still missing something here...

Re: [PATCH 2/5] gpio: Cygnus: add GPIO driver

[Joe Perches]

On Fri, 2014-12-05 at 19:41 -0800, Ray Jui wrote:
> On 12/5/2014 6:34 PM, Joe Perches wrote:
> > On Fri, 2014-12-05 at 18:14 -0800, Ray Jui wrote:
> >> On 12/5/2014 5:28 PM, Joe Perches wrote:
> >>> On Fri, 2014-12-05 at 16:40 -0800, Ray Jui wrote:
> >>>> +			for_each_set_bit(bit, &val, 32) {
[]
> Actually, by reviewing the code more deeply, I'm not sure why using 
> for_each_set_bit here is 'endian unsafe'.

It's not.  The 32 confused me as it was long
and sizeof(long) isn't necessarily 32.

Maybe the 32 should be a #define

Re: [PATCH 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

On 12/5/2014 8:24 PM, Joe Perches wrote:
> On Fri, 2014-12-05 at 19:41 -0800, Ray Jui wrote:
>> On 12/5/2014 6:34 PM, Joe Perches wrote:
>>> On Fri, 2014-12-05 at 18:14 -0800, Ray Jui wrote:
>>>> On 12/5/2014 5:28 PM, Joe Perches wrote:
>>>>> On Fri, 2014-12-05 at 16:40 -0800, Ray Jui wrote:
>>>>>> +			for_each_set_bit(bit, &val, 32) {
> []
>> Actually, by reviewing the code more deeply, I'm not sure why using
>> for_each_set_bit here is 'endian unsafe'.
>
> It's not.  The 32 confused me as it was long
> and sizeof(long) isn't necessarily 32.
>
> Maybe the 32 should be a #define
>
>
>
Okay, to improve readability, I will change 32 to NGPIOS_PER_BANK.

Re: [PATCH 2/5] gpio: Cygnus: add GPIO driver

[Ray Jui]

On 12/5/2014 6:14 PM, Ray Jui wrote:
>>> +static struct irq_chip bcm_cygnus_gpio_irq_chip = {
>>> +    .name = "bcm-cygnus-gpio",
>>> +    .irq_ack = bcm_cygnus_gpio_irq_ack,
>>> +    .irq_mask = bcm_cygnus_gpio_irq_mask,
>>> +    .irq_unmask = bcm_cygnus_gpio_irq_unmask,
>>> +    .irq_set_type = bcm_cygnus_gpio_irq_set_type,
>>> +};
>>
>> const?
>>
>
>
> Sure, will add const to bcm_cygnus_gpio_irq_chip
>
>>> +static struct irq_domain_ops bcm_cygnus_irq_ops = {
>>> +    .map = bcm_cygnus_gpio_irq_map,
>>> +    .unmap = bcm_cygnus_gpio_irq_unmap,
>>> +    .xlate = irq_domain_xlate_twocell,
>>> +};
>>
>> const here too?
>>
>
> Yes, will make bcm_cygnus_irq_ops const.
>
Actually, I cannot make them const here. Note they are passed into other 
APIs which can potentially modifies their values internally.

drivers/gpio/gpio-bcm-cygnus.c: In function ‘bcm_cygnus_gpio_irq_map’:
drivers/gpio/gpio-bcm-cygnus.c:430:4: warning: passing argument 2 of 
‘irq_set_chip_and_handler’ discards ‘const’ qualifier from pointer 
target type [enabled by default]
     handle_simple_irq);
     ^
In file included from drivers/gpio/gpio-bcm-cygnus.c:17:0:
include/linux/irq.h:461:20: note: expected ‘struct irq_chip *’ but 
argument is of type ‘const struct irq_chip *’
  static inline void irq_set_chip_and_handler(unsigned int irq, struct 
irq_chip *chip,
                     ^
drivers/gpio/gpio-bcm-cygnus.c: In function ‘bcm_cygnus_gpio_probe’:
drivers/gpio/gpio-bcm-cygnus.c:679:5: warning: passing argument 2 of 
‘irq_set_chip_and_handler’ discards ‘const’ qualifier from pointer 
target type [enabled by default]
      handle_simple_irq);
      ^
In file included from drivers/gpio/gpio-bcm-cygnus.c:17:0:
include/linux/irq.h:461:20: note: expected ‘struct irq_chip *’ but 
argument is of type ‘const struct irq_chip *’
  static inline void irq_set_chip_and_handler(unsigned int irq, struct 
irq_chip *chip,
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[PATCH 3/5] ARM: mach-bcm: Enable GPIO support for Cygnus

[Ray Jui]

Enable GPIO driver for Broadcom Cygnus SoC by selecting GPIO_BCM_CYGNUS

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/mach-bcm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index aaeec78..5066d5d 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -29,6 +29,7 @@ config ARCH_BCM_IPROC
 config ARCH_BCM_CYGNUS
 	bool "Broadcom Cygnus Support" if ARCH_MULTI_V7
 	select ARCH_BCM_IPROC
+	select GPIO_BCM_CYGNUS
 	help
 	  Enable support for the Cygnus family,
 	  which includes the following variants:
-- 
1.7.9.5

[PATCH 4/5] ARM: dts: enable GPIO for Broadcom Cygnus

[Ray Jui]

This enables all 3 GPIO controllers including the ASIU GPIO, the
chipcommonG GPIO, and the ALWAYS-ON GPIO, for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |   30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..c7587c1 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,36 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-ccm-gpio";
+		reg = <0x1800a000 0x50>,
+			<0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-asiu-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-crmu-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-interrupt;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH 5/5] MAINTAINERS: Entry for Cygnus GPIO driver

[Ray Jui]

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 MAINTAINERS |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 7b712d8..5d67204 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2174,6 +2174,13 @@ N:	bcm9583*
 N:	bcm583*
 N:	bcm113*
 
+BROADCOM CYGNUS GPIO DRIVER
+M:	Ray Jui <rjui@broadcom.com>
+L:	bcm-kernel-feedback-list@broadcom.com
+S:	Supported
+F:	drivers/gpio/gpio-bcm-cygnus.c
+F:	Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
+
 BROADCOM KONA GPIO DRIVER
 M:	Ray Jui <rjui@broadcom.com>
 L:	bcm-kernel-feedback-list@broadcom.com
-- 
1.7.9.5

[PATCH v6 0/3] Add gpio support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the same Cygnus GPIO driver

Changes from v5:
 - Get rid of DT property "linux,gpio-base". Use dynamic allocation for GPIO base
   number

Changes from v4:
 - Use DT property "linux,gpio-base" to define GPIO base number
 - factorize common code to improve code readability and reduce code size
 - remove "bcm_" prefix on function and struct names
 - improve debugging prints
 - default GPIO_BCM_CYGNUS to y in Kconfig (it still depends on
   ARCH_BCM_CYGNUS). This way we do not need to select it from the
   arch/arm/mach-bcm/Kconfig
 - Get rid of redundant MAINTAINER entry for this driver. It will be maintained
   by Broadcom iProc/Cygnus maintainers
 - Update device tree document based on driver changes

Changes from v3:
 - Fix dt property tpyo
 - Fix incorrect GPIO compatible ID in device tree binding document example

Changes from v2:
 - Consolidate different compatible IDs into "brcm,cygnus-gpio"
 - Get rid of redundant "no-interrupt" property

Changes from v1:
 - Get rid of inline qualifier
 - Get rid of redundant check in the ISR
 - Other minor fixes to imrove code readability

Ray Jui (3):
  gpio: Cygnus: define Broadcom Cygnus GPIO binding
  gpio: Cygnus: add GPIO driver
  ARM: dts: enable GPIO for Broadcom Cygnus

 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   82 +++
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   30 +
 drivers/gpio/Kconfig                               |   12 +
 drivers/gpio/Makefile                              |    1 +
 drivers/gpio/gpio-bcm-cygnus.c                     |  607 ++++++++++++++++++++
 5 files changed, 732 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

-- 
1.7.9.5

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[PATCH v6 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

[Ray Jui]

Document the GPIO device tree binding for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 .../devicetree/bindings/gpio/brcm,cygnus-gpio.txt  |   82 ++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt

diff --git a/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
new file mode 100644
index 0000000..dca322a
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/brcm,cygnus-gpio.txt
@@ -0,0 +1,82 @@
+Broadcom Cygnus GPIO Controller
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-gpio"
+
+- reg:
+    Define the base and range of the I/O address space that contain the Cygnus
+GPIO controller registers
+
+- ngpios:
+    Total number of GPIOs the controller provides
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's domain) and the second cell is used for the following:
+    bit[0]: polarity (0 for normal and 1 for inverted)
+    bit[18:16]: internal pull up/down: 0 - pull up/down disabled
+                                       1 - pull up enabled
+                                       2 - pull down enabled
+    bit[22:20]: drive strength: 0 - 2 mA
+                                1 - 4 mA
+                                2 - 6 mA
+                                3 - 8 mA
+                                4 - 10 mA
+                                5 - 12 mA
+                                6 - 14 mA
+                                7 - 16 mA
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller. Not all Cygnus GPIO
+interfaces support interrupt, e.g., the CRMU GPIO controller does not have its
+interrupt routed to the main processor's GIC
+
+- interrupts:
+    The interrupt outputs from the GPIO controller.
+
+- no-drv-strength:
+    Specifies the GPIO controller does not support drive strength configuration
+
+Example:
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-drv-strength;
+	};
+
+	/*
+	 * Touchscreen that uses the ASIU GPIO 100, with internal pull-up
+	 * enabled
+	 */
+	tsc {
+		...
+		...
+		gpio-event = <&gpio_asiu 100 0x10000>;
+	};
+
+	/* Bluetooth that uses the CRMU GPIO 2, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_crmu 2 1>
+	}
-- 
1.7.9.5

[PATCH v6 2/3] gpio: Cygnus: add GPIO driver

[Ray Jui]

This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller, 2) the
chipCommonG GPIO controller, and 3) the ALWAYS-ON GPIO controller

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/gpio/Kconfig           |   12 +
 drivers/gpio/Makefile          |    1 +
 drivers/gpio/gpio-bcm-cygnus.c |  607 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 620 insertions(+)
 create mode 100644 drivers/gpio/gpio-bcm-cygnus.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 633ec21..1790ffd 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -126,6 +126,18 @@ config GPIO_74XX_MMIO
 	    8 bits:	74244 (Input), 74273 (Output)
 	    16 bits:	741624 (Input), 7416374 (Output)
 
+config GPIO_BCM_CYGNUS
+	bool "Broadcom Cygnus GPIO support"
+	depends on ARCH_BCM_CYGNUS && OF_GPIO
+	default y
+	help
+	  Say yes here to turn on GPIO support for Broadcom Cygnus SoC
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU). All 3 GPIO controllers are
+	  supported by this driver
+
 config GPIO_CLPS711X
 	tristate "CLPS711X GPIO support"
 	depends on ARCH_CLPS711X || COMPILE_TEST
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 81755f1..31eb7e0 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_GPIO_ADP5520)	+= gpio-adp5520.o
 obj-$(CONFIG_GPIO_ADP5588)	+= gpio-adp5588.o
 obj-$(CONFIG_GPIO_AMD8111)	+= gpio-amd8111.o
 obj-$(CONFIG_GPIO_ARIZONA)	+= gpio-arizona.o
+obj-$(CONFIG_GPIO_BCM_CYGNUS)	+= gpio-bcm-cygnus.o
 obj-$(CONFIG_GPIO_BCM_KONA)	+= gpio-bcm-kona.o
 obj-$(CONFIG_GPIO_BT8XX)	+= gpio-bt8xx.o
 obj-$(CONFIG_GPIO_CLPS711X)	+= gpio-clps711x.o
diff --git a/drivers/gpio/gpio-bcm-cygnus.c b/drivers/gpio/gpio-bcm-cygnus.c
new file mode 100644
index 0000000..817bc9a
--- /dev/null
+++ b/drivers/gpio/gpio-bcm-cygnus.c
@@ -0,0 +1,607 @@
+/*
+ * Copyright (C) 2014 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/irqchip/chained_irq.h>
+
+#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
+#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
+#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
+#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
+#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
+#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
+#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
+#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
+#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
+#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
+#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
+#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
+
+/* drive strength control for ASIU GPIO */
+#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+
+/* drive strength control for CCM GPIO */
+#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
+
+#define GPIO_BANK_SIZE 0x200
+#define NGPIOS_PER_BANK 32
+#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
+
+#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
+#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
+
+#define GPIO_FLAG_BIT_MASK           0xffff
+#define GPIO_PULL_BIT_SHIFT          16
+#define GPIO_PULL_BIT_MASK           0x3
+
+#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
+#define GPIO_DRV_STRENGTH_BITS       3
+#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
+
+/*
+ * For GPIO internal pull up/down registers
+ */
+enum gpio_pull {
+	GPIO_PULL_NONE = 0,
+	GPIO_PULL_UP,
+	GPIO_PULL_DOWN,
+	GPIO_PULL_INVALID,
+};
+
+/*
+ * GPIO drive strength
+ */
+enum gpio_drv_strength {
+	GPIO_DRV_STRENGTH_2MA = 0,
+	GPIO_DRV_STRENGTH_4MA,
+	GPIO_DRV_STRENGTH_6MA,
+	GPIO_DRV_STRENGTH_8MA,
+	GPIO_DRV_STRENGTH_10MA,
+	GPIO_DRV_STRENGTH_12MA,
+	GPIO_DRV_STRENGTH_14MA,
+	GPIO_DRV_STRENGTH_16MA,
+	GPIO_DRV_STRENGTH_INVALID,
+};
+
+struct cygnus_gpio {
+	struct device *dev;
+	void __iomem *base;
+	void __iomem *io_ctrl;
+	spinlock_t lock;
+	struct gpio_chip gc;
+	unsigned num_banks;
+	int irq;
+	struct irq_domain *irq_domain;
+};
+
+static struct cygnus_gpio *to_cygnus_gpio(struct gpio_chip *gc)
+{
+	return container_of(gc, struct cygnus_gpio, gc);
+}
+
+static u32 cygnus_readl(struct cygnus_gpio *cygnus_gpio, unsigned int offset)
+{
+	return readl(cygnus_gpio->base + offset);
+}
+
+static void cygnus_writel(struct cygnus_gpio *cygnus_gpio,
+			  unsigned int offset, u32 val)
+{
+	writel(val, cygnus_gpio->base + offset);
+}
+
+/**
+ *  cygnus_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
+ *  Cygnus GPIO register
+ *
+ *  @cygnus_gpio: Cygnus GPIO device
+ *  @reg: register offset
+ *  @gpio: GPIO pin
+ *  @set: set or clear. 1 - set; 0 -clear
+ */
+static void cygnus_set_bit(struct cygnus_gpio *cygnus_gpio,
+			   unsigned int reg, unsigned gpio, int set)
+{
+	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val;
+
+	val = cygnus_readl(cygnus_gpio, offset);
+	if (set)
+		val |= BIT(shift);
+	else
+		val &= ~BIT(shift);
+	cygnus_writel(cygnus_gpio, offset, val);
+}
+
+static int cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+
+	return irq_find_mapping(cygnus_gpio->irq_domain, offset);
+}
+
+static void cygnus_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	struct cygnus_gpio *cygnus_gpio;
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	int i, bit;
+
+	chained_irq_enter(chip, desc);
+
+	cygnus_gpio = irq_get_handler_data(irq);
+
+	/* go through the entire GPIO banks and handle all interrupts */
+	for (i = 0; i < cygnus_gpio->num_banks; i++) {
+		unsigned long val = cygnus_readl(cygnus_gpio,
+				(i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_MSTAT_OFFSET);
+
+		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
+			unsigned pin = NGPIOS_PER_BANK * i + bit;
+			int child_irq =
+				cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
+
+			/*
+			 * Clear the interrupt before invoking the
+			 * handler, so we do not leave any window
+			 */
+			cygnus_writel(cygnus_gpio, (i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_CLR_OFFSET, BIT(bit));
+
+			generic_handle_irq(child_irq);
+		}
+	}
+
+	chained_irq_exit(chip, desc);
+}
+
+
+static void cygnus_gpio_irq_ack(struct irq_data *d)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	unsigned int offset = CYGNUS_GPIO_REG(gpio,
+			CYGNUS_GPIO_INT_CLR_OFFSET);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val = BIT(shift);
+
+	cygnus_writel(cygnus_gpio, offset, val);
+}
+
+/**
+ *  cygnus_gpio_irq_set_mask - mask/unmask a GPIO interrupt
+ *
+ *  @d: IRQ chip data
+ *  @mask: mask/unmask GPIO interrupt. 0 - mask (disable); 1 - unmask (enable)
+ */
+static void cygnus_gpio_irq_set_mask(struct irq_data *d, int mask)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_MSK_OFFSET, gpio, mask);
+}
+
+static void cygnus_gpio_irq_mask(struct irq_data *d)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_gpio_irq_set_mask(d, 0);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static void cygnus_gpio_irq_unmask(struct irq_data *d)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_gpio_irq_set_mask(d, 1);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+}
+
+static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct cygnus_gpio *cygnus_gpio = irq_data_get_irq_chip_data(d);
+	unsigned gpio = d->hwirq;
+	int int_type = 0, dual_edge = 0, edge_lvl = 0;
+	unsigned long flags;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		dual_edge = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		int_type = 1;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		int_type = 1;
+		break;
+
+	default:
+		dev_err(cygnus_gpio->dev, "invalid GPIO IRQ type 0x%x\n",
+				type);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_IN_TYPE_OFFSET, gpio,
+			int_type);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_DE_OFFSET, gpio,
+			dual_edge);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio,
+			edge_lvl);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+		"gpio:%u set int_type:%d dual_edge:%d edge_lvl:%d\n",
+		gpio, int_type, dual_edge, edge_lvl);
+
+	return 0;
+}
+
+static struct irq_chip cygnus_gpio_irq_chip = {
+	.name = "bcm-cygnus-gpio",
+	.irq_ack = cygnus_gpio_irq_ack,
+	.irq_mask = cygnus_gpio_irq_mask,
+	.irq_unmask = cygnus_gpio_irq_unmask,
+	.irq_set_type = cygnus_gpio_irq_set_type,
+};
+
+static int cygnus_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 0);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u set input\n", gpio);
+
+	return 0;
+}
+
+static int cygnus_gpio_direction_output(struct gpio_chip *gc,
+		unsigned gpio, int value)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 1);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u set output, value:%d\n",
+			gpio, value);
+
+	return 0;
+}
+
+static void cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio,
+		int value)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u set, value:%d\n", gpio, value);
+}
+
+static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	unsigned int offset = CYGNUS_GPIO_REG(gpio,
+			CYGNUS_GPIO_DATA_IN_OFFSET);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val;
+
+	val = cygnus_readl(cygnus_gpio, offset);
+	val = (val >> shift) & 1;
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u get, value:%d\n", gpio, val);
+
+	return val;
+}
+
+static struct lock_class_key gpio_lock_class;
+
+static int cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
+			       irq_hw_number_t hwirq)
+{
+	int ret;
+
+	ret = irq_set_chip_data(irq, d->host_data);
+	if (ret < 0)
+		return ret;
+	irq_set_lockdep_class(irq, &gpio_lock_class);
+	irq_set_chip_and_handler(irq, &cygnus_gpio_irq_chip,
+			handle_simple_irq);
+	set_irq_flags(irq, IRQF_VALID);
+
+	return 0;
+}
+
+static void cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
+{
+	irq_set_chip_and_handler(irq, NULL, NULL);
+	irq_set_chip_data(irq, NULL);
+}
+
+static struct irq_domain_ops cygnus_irq_ops = {
+	.map = cygnus_gpio_irq_map,
+	.unmap = cygnus_gpio_irq_unmap,
+	.xlate = irq_domain_xlate_twocell,
+};
+
+#ifdef CONFIG_OF_GPIO
+static void cygnus_gpio_set_pull(struct cygnus_gpio *cygnus_gpio,
+				 unsigned gpio, enum gpio_pull pull)
+{
+	int pullup;
+	unsigned long flags;
+
+	switch (pull) {
+	case GPIO_PULL_UP:
+		pullup = 1;
+		break;
+	case GPIO_PULL_DOWN:
+		pullup = 0;
+		break;
+	case GPIO_PULL_NONE:
+	case GPIO_PULL_INVALID:
+	default:
+		return;
+	}
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+	/* set pull up/down */
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_PAD_RES_OFFSET, gpio, pullup);
+	/* enable pad */
+	cygnus_set_bit(cygnus_gpio, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 1);
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev, "gpio:%u set pullup:%d\n", gpio, pullup);
+}
+
+static void cygnus_gpio_set_strength(struct cygnus_gpio *cygnus_gpio,
+		unsigned gpio, enum gpio_drv_strength strength)
+{
+	struct device *dev = cygnus_gpio->dev;
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	/* some GPIO controllers do not support drive strength configuration */
+	if (of_find_property(dev->of_node, "no-drv-strength", NULL))
+		return;
+
+	/*
+	 * Some GPIO controllers use a different register block for drive
+	 * strength control
+	 */
+	if (cygnus_gpio->io_ctrl) {
+		base = cygnus_gpio->io_ctrl;
+		offset = CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET;
+	} else {
+		base = cygnus_gpio->base;
+		offset = CYGNUS_GPIO_REG(gpio,
+				CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
+	}
+
+	shift = CYGNUS_GPIO_SHIFT(gpio);
+
+	spin_lock_irqsave(&cygnus_gpio->lock, flags);
+
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset);
+		val &= ~BIT(shift);
+		val |= ((strength >> i) & 0x1) << shift;
+		writel(val, base + offset);
+		offset += 4;
+	}
+
+	spin_unlock_irqrestore(&cygnus_gpio->lock, flags);
+
+	dev_dbg(cygnus_gpio->dev,
+			"gpio:%u set drive strength:%d\n", gpio, strength);
+}
+
+static int cygnus_gpio_of_xlate(struct gpio_chip *gc,
+		const struct of_phandle_args *gpiospec, u32 *flags)
+{
+	struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
+	enum gpio_pull pull;
+	enum gpio_drv_strength strength;
+
+	if (gc->of_gpio_n_cells < 2)
+		return -EINVAL;
+
+	if (WARN_ON(gpiospec->args_count < gc->of_gpio_n_cells))
+		return -EINVAL;
+
+	if (gpiospec->args[0] >= gc->ngpio)
+		return -EINVAL;
+
+	pull = (gpiospec->args[1] >> GPIO_PULL_BIT_SHIFT) & GPIO_PULL_BIT_MASK;
+	if (WARN_ON(pull >= GPIO_PULL_INVALID))
+		return -EINVAL;
+
+	strength = (gpiospec->args[1] >> GPIO_DRV_STRENGTH_BIT_SHIFT) &
+		GPIO_DRV_STRENGTH_BIT_MASK;
+
+	if (flags)
+		*flags = gpiospec->args[1] & GPIO_FLAG_BIT_MASK;
+
+	cygnus_gpio_set_pull(cygnus_gpio, gpiospec->args[0], pull);
+	cygnus_gpio_set_strength(cygnus_gpio, gpiospec->args[0], strength);
+
+	return gpiospec->args[0];
+}
+#endif
+
+static const struct of_device_id cygnus_gpio_of_match[] = {
+	{ .compatible = "brcm,cygnus-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cygnus_gpio_of_match);
+
+static int cygnus_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct cygnus_gpio *cygnus_gpio;
+	struct gpio_chip *gc;
+	u32 i, ngpios;
+	int ret;
+
+	cygnus_gpio = devm_kzalloc(dev, sizeof(*cygnus_gpio), GFP_KERNEL);
+	if (!cygnus_gpio)
+		return -ENOMEM;
+
+	cygnus_gpio->dev = dev;
+	platform_set_drvdata(pdev, cygnus_gpio);
+
+	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+		dev_err(&pdev->dev, "missing ngpios DT property\n");
+		return -ENODEV;
+	}
+	cygnus_gpio->num_banks = (ngpios + NGPIOS_PER_BANK - 1) /
+		NGPIOS_PER_BANK;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	cygnus_gpio->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(cygnus_gpio->base)) {
+		dev_err(&pdev->dev, "unable to map I/O memory\n");
+		return PTR_ERR(cygnus_gpio->base);
+	}
+
+	/*
+	 * Only certain types of Cygnus GPIO interfaces have I/O control
+	 * registers
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		cygnus_gpio->io_ctrl = devm_ioremap_resource(dev, res);
+		if (IS_ERR(cygnus_gpio->io_ctrl)) {
+			dev_err(&pdev->dev, "unable to map I/O memory\n");
+			return PTR_ERR(cygnus_gpio->io_ctrl);
+		}
+	}
+
+	spin_lock_init(&cygnus_gpio->lock);
+
+	gc = &cygnus_gpio->gc;
+	gc->base = -1;
+	gc->ngpio = ngpios;
+	gc->label = dev_name(dev);
+	gc->dev = dev;
+#ifdef CONFIG_OF_GPIO
+	gc->of_node = dev->of_node;
+	gc->of_gpio_n_cells = 2;
+	gc->of_xlate = cygnus_gpio_of_xlate;
+#endif
+	gc->direction_input = cygnus_gpio_direction_input;
+	gc->direction_output = cygnus_gpio_direction_output;
+	gc->set = cygnus_gpio_set;
+	gc->get = cygnus_gpio_get;
+	gc->to_irq = cygnus_gpio_to_irq;
+
+	ret = gpiochip_add(gc);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "unable to add GPIO chip\n");
+		return ret;
+	}
+
+	/*
+	 * Some of the GPIO interfaces do not have interrupt wired to the main
+	 * processor
+	 */
+	cygnus_gpio->irq = platform_get_irq(pdev, 0);
+	if (cygnus_gpio->irq < 0) {
+		ret = cygnus_gpio->irq;
+		if (ret == -EPROBE_DEFER)
+			goto err_rm_gpiochip;
+
+		dev_info(&pdev->dev, "no interrupt hook\n");
+	}
+
+	cygnus_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
+			gc->ngpio, &cygnus_irq_ops, cygnus_gpio);
+	if (!cygnus_gpio->irq_domain) {
+		dev_err(&pdev->dev, "unable to allocate IRQ domain\n");
+		ret = -ENXIO;
+		goto err_rm_gpiochip;
+	}
+
+	for (i = 0; i < gc->ngpio; i++) {
+		int irq = irq_create_mapping(cygnus_gpio->irq_domain, i);
+
+		irq_set_lockdep_class(irq, &gpio_lock_class);
+		irq_set_chip_data(irq, cygnus_gpio);
+		irq_set_chip_and_handler(irq, &cygnus_gpio_irq_chip,
+				handle_simple_irq);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	irq_set_chained_handler(cygnus_gpio->irq, cygnus_gpio_irq_handler);
+	irq_set_handler_data(cygnus_gpio->irq, cygnus_gpio);
+
+	return 0;
+
+err_rm_gpiochip:
+	gpiochip_remove(gc);
+	return ret;
+}
+
+static struct platform_driver cygnus_gpio_driver = {
+	.driver = {
+		.name = "bcm-cygnus-gpio",
+		.owner = THIS_MODULE,
+		.of_match_table = cygnus_gpio_of_match,
+	},
+	.probe = cygnus_gpio_probe,
+};
+
+module_platform_driver(cygnus_gpio_driver);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

Re: [PATCH v6 2/3] gpio: Cygnus: add GPIO driver

[Linus Walleij]

On Tue, Dec 16, 2014 at 3:18 AM, Ray Jui <rjui@broadcom.com> wrote:

> This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
> SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller, 2) the
> chipCommonG GPIO controller, and 3) the ALWAYS-ON GPIO controller
>
> Signed-off-by: Ray Jui <rjui@broadcom.com>
> Reviewed-by: Scott Branden <sbranden@broadcom.com>

(Big thanks to Alexandre for doing the major part of the review,
good work with following up so far!)

(...)
> +config GPIO_BCM_CYGNUS
> +       bool "Broadcom Cygnus GPIO support"
> +       depends on ARCH_BCM_CYGNUS && OF_GPIO

select GPIOLIB_IRQCHIP

See more about this below.

> +++ b/drivers/gpio/gpio-bcm-cygnus.c
> @@ -0,0 +1,607 @@
> +/*
> + * Copyright (C) 2014 Broadcom Corporation
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/slab.h>
> +#include <linux/module.h>
> +#include <linux/irq.h>
> +#include <linux/interrupt.h>
> +#include <linux/io.h>
> +#include <linux/gpio.h>
> +#include <linux/ioport.h>
> +#include <linux/of_device.h>
> +#include <linux/of_irq.h>
> +#include <linux/irqchip/chained_irq.h>

Skip <linux/irq.h> and <linux/irqchip/chained_irq.h>
as these move to the core with GPIOLIB_IRQCHIP

> +#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
> +#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
> +#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
> +#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
> +#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
> +#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
> +#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
> +#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
> +#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
> +#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
> +#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
> +#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
> +
> +/* drive strength control for ASIU GPIO */
> +#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
> +
> +/* drive strength control for CCM GPIO */
> +#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00

This stuff (drive strength) is pin control, pin config.
It does not belong in a pure GPIO driver. If you're
making a combined pin control + GPIO driver, it
shall be put in drivers/pinctrl/*

> +#define GPIO_BANK_SIZE 0x200
> +#define NGPIOS_PER_BANK 32
> +#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
> +
> +#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
> +#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
> +
> +#define GPIO_FLAG_BIT_MASK           0xffff
> +#define GPIO_PULL_BIT_SHIFT          16
> +#define GPIO_PULL_BIT_MASK           0x3
> +
> +#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
> +#define GPIO_DRV_STRENGTH_BITS       3
> +#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
> +
> +/*
> + * For GPIO internal pull up/down registers
> + */
> +enum gpio_pull {
> +       GPIO_PULL_NONE = 0,
> +       GPIO_PULL_UP,
> +       GPIO_PULL_DOWN,
> +       GPIO_PULL_INVALID,
> +};
> +
> +/*
> + * GPIO drive strength
> + */
> +enum gpio_drv_strength {
> +       GPIO_DRV_STRENGTH_2MA = 0,
> +       GPIO_DRV_STRENGTH_4MA,
> +       GPIO_DRV_STRENGTH_6MA,
> +       GPIO_DRV_STRENGTH_8MA,
> +       GPIO_DRV_STRENGTH_10MA,
> +       GPIO_DRV_STRENGTH_12MA,
> +       GPIO_DRV_STRENGTH_14MA,
> +       GPIO_DRV_STRENGTH_16MA,
> +       GPIO_DRV_STRENGTH_INVALID,
> +};


All this pull up/down and drive strength is pin config for
the pin control subsystem.

> +struct cygnus_gpio {
> +       struct device *dev;
> +       void __iomem *base;
> +       void __iomem *io_ctrl;
> +       spinlock_t lock;
> +       struct gpio_chip gc;
> +       unsigned num_banks;
> +       int irq;
> +       struct irq_domain *irq_domain;

Skip irq and irqdomain and use GPIOLIB_IRQCHIP

> +static u32 cygnus_readl(struct cygnus_gpio *cygnus_gpio, unsigned int offset)
> +{
> +       return readl(cygnus_gpio->base + offset);
> +}
> +
> +static void cygnus_writel(struct cygnus_gpio *cygnus_gpio,
> +                         unsigned int offset, u32 val)
> +{
> +       writel(val, cygnus_gpio->base + offset);
> +}

I don't see the value of using these accessors over just inlining
your readl/writel stuff.

(...)
> +static int cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
> +{
> +       struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
> +
> +       return irq_find_mapping(cygnus_gpio->irq_domain, offset);
> +}

This goes away to the core with GPIOLIB_IRQCHIP

> +static void cygnus_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
> +{
> +       struct cygnus_gpio *cygnus_gpio;
> +       struct irq_chip *chip = irq_desc_get_chip(desc);
> +       int i, bit;
> +
> +       chained_irq_enter(chip, desc);
> +
> +       cygnus_gpio = irq_get_handler_data(irq);
> +
> +       /* go through the entire GPIO banks and handle all interrupts */
> +       for (i = 0; i < cygnus_gpio->num_banks; i++) {
> +               unsigned long val = cygnus_readl(cygnus_gpio,
> +                               (i * GPIO_BANK_SIZE) +
> +                               CYGNUS_GPIO_INT_MSTAT_OFFSET);
> +
> +               for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
> +                       unsigned pin = NGPIOS_PER_BANK * i + bit;
> +                       int child_irq =
> +                               cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
> +
> +                       /*
> +                        * Clear the interrupt before invoking the
> +                        * handler, so we do not leave any window
> +                        */
> +                       cygnus_writel(cygnus_gpio, (i * GPIO_BANK_SIZE) +
> +                               CYGNUS_GPIO_INT_CLR_OFFSET, BIT(bit));
> +
> +                       generic_handle_irq(child_irq);
> +               }
> +       }
> +
> +       chained_irq_exit(chip, desc);
> +}

Looks good, but you will need to have the struct gpio_chip * as
handler data to use GPIOLIB_IRQCHIP, so get from there to
the struct cygnus_gpio something like:

struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct cygnus_gpio *cyg = to_cygnus_gpio(gc);

> +static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
> +{
> +       struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
> +       unsigned int offset = CYGNUS_GPIO_REG(gpio,
> +                       CYGNUS_GPIO_DATA_IN_OFFSET);
> +       unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
> +       u32 val;
> +
> +       val = cygnus_readl(cygnus_gpio, offset);
> +       val = (val >> shift) & 1;

No, do this:

return !!(cygnus_readl(cygnus_gpio, offset) & BIT(shift));

Maybe rename the "shift" variable to "bit" or just use the macro
directly in the readl().

> +static int cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
> +                              irq_hw_number_t hwirq)
> +{
> +       int ret;
> +
> +       ret = irq_set_chip_data(irq, d->host_data);
> +       if (ret < 0)
> +               return ret;
> +       irq_set_lockdep_class(irq, &gpio_lock_class);
> +       irq_set_chip_and_handler(irq, &cygnus_gpio_irq_chip,
> +                       handle_simple_irq);
> +       set_irq_flags(irq, IRQF_VALID);
> +
> +       return 0;
> +}
> +
> +static void cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
> +{
> +       irq_set_chip_and_handler(irq, NULL, NULL);
> +       irq_set_chip_data(irq, NULL);
> +}
> +
> +static struct irq_domain_ops cygnus_irq_ops = {
> +       .map = cygnus_gpio_irq_map,
> +       .unmap = cygnus_gpio_irq_unmap,
> +       .xlate = irq_domain_xlate_twocell,
> +};

All this goes away with GPIOLIB_IRQCHIP (that is what is good about it).

> +#ifdef CONFIG_OF_GPIO

What, that should be defined all the time, you depend on it in
Kconfig!

> +static void cygnus_gpio_set_pull(struct cygnus_gpio *cygnus_gpio,
> +                                unsigned gpio, enum gpio_pull pull)
(...)
> +static void cygnus_gpio_set_strength(struct cygnus_gpio *cygnus_gpio,
> +               unsigned gpio, enum gpio_drv_strength strength)
(...)
> +static int cygnus_gpio_of_xlate(struct gpio_chip *gc,
> +               const struct of_phandle_args *gpiospec, u32 *flags)

NAK. This is pin control, put this in the pin control driver.

I guess the same that is part of this patch series.

(...)
> +static int cygnus_gpio_probe(struct platform_device *pdev)
> +{
> +       struct device *dev = &pdev->dev;
> +       struct resource *res;
> +       struct cygnus_gpio *cygnus_gpio;
> +       struct gpio_chip *gc;
> +       u32 i, ngpios;
> +       int ret;
> +
> +       cygnus_gpio = devm_kzalloc(dev, sizeof(*cygnus_gpio), GFP_KERNEL);
> +       if (!cygnus_gpio)
> +               return -ENOMEM;
> +
> +       cygnus_gpio->dev = dev;
> +       platform_set_drvdata(pdev, cygnus_gpio);
> +
> +       if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
> +               dev_err(&pdev->dev, "missing ngpios DT property\n");
> +               return -ENODEV;
> +       }
> +       cygnus_gpio->num_banks = (ngpios + NGPIOS_PER_BANK - 1) /
> +               NGPIOS_PER_BANK;
> +
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> +       cygnus_gpio->base = devm_ioremap_resource(dev, res);
> +       if (IS_ERR(cygnus_gpio->base)) {
> +               dev_err(&pdev->dev, "unable to map I/O memory\n");
> +               return PTR_ERR(cygnus_gpio->base);
> +       }
> +
> +       /*
> +        * Only certain types of Cygnus GPIO interfaces have I/O control
> +        * registers
> +        */
> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> +       if (res) {
> +               cygnus_gpio->io_ctrl = devm_ioremap_resource(dev, res);
> +               if (IS_ERR(cygnus_gpio->io_ctrl)) {
> +                       dev_err(&pdev->dev, "unable to map I/O memory\n");
> +                       return PTR_ERR(cygnus_gpio->io_ctrl);
> +               }
> +       }

This is a good indication that it's a separate piece of HW and should
be a separate pin control driver.

> +
> +       spin_lock_init(&cygnus_gpio->lock);
> +
> +       gc = &cygnus_gpio->gc;
> +       gc->base = -1;
> +       gc->ngpio = ngpios;
> +       gc->label = dev_name(dev);
> +       gc->dev = dev;
> +#ifdef CONFIG_OF_GPIO

You depend on this symbol.

> +       gc->of_node = dev->of_node;
> +       gc->of_gpio_n_cells = 2;
> +       gc->of_xlate = cygnus_gpio_of_xlate;
> +#endif
> +       gc->direction_input = cygnus_gpio_direction_input;
> +       gc->direction_output = cygnus_gpio_direction_output;
> +       gc->set = cygnus_gpio_set;
> +       gc->get = cygnus_gpio_get;
> +       gc->to_irq = cygnus_gpio_to_irq;
> +
> +       ret = gpiochip_add(gc);
> +       if (ret < 0) {
> +               dev_err(&pdev->dev, "unable to add GPIO chip\n");
> +               return ret;
> +       }
> +
> +       /*
> +        * Some of the GPIO interfaces do not have interrupt wired to the main
> +        * processor
> +        */
> +       cygnus_gpio->irq = platform_get_irq(pdev, 0);
> +       if (cygnus_gpio->irq < 0) {
> +               ret = cygnus_gpio->irq;
> +               if (ret == -EPROBE_DEFER)
> +                       goto err_rm_gpiochip;
> +
> +               dev_info(&pdev->dev, "no interrupt hook\n");
> +       }

>From here:

> +       cygnus_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
> +                       gc->ngpio, &cygnus_irq_ops, cygnus_gpio);
> +       if (!cygnus_gpio->irq_domain) {
> +               dev_err(&pdev->dev, "unable to allocate IRQ domain\n");
> +               ret = -ENXIO;
> +               goto err_rm_gpiochip;
> +       }
> +
> +       for (i = 0; i < gc->ngpio; i++) {
> +               int irq = irq_create_mapping(cygnus_gpio->irq_domain, i);
> +
> +               irq_set_lockdep_class(irq, &gpio_lock_class);
> +               irq_set_chip_data(irq, cygnus_gpio);
> +               irq_set_chip_and_handler(irq, &cygnus_gpio_irq_chip,
> +                               handle_simple_irq);
> +               set_irq_flags(irq, IRQF_VALID);
> +       }
> +
> +       irq_set_chained_handler(cygnus_gpio->irq, cygnus_gpio_irq_handler);
> +       irq_set_handler_data(cygnus_gpio->irq, cygnus_gpio);

To here, replace with a single call to
gpiochip_set_chained_irqchip(chip *, irq_chip *, irq, handler)...

Look at other drivers using GPIOLIB_IRQCHIP for inspiration.

Yours,
Linus Walleij

Re: [PATCH v6 2/3] gpio: Cygnus: add GPIO driver

[Ray Jui]

On 1/13/2015 12:53 AM, Linus Walleij wrote:
> On Tue, Dec 16, 2014 at 3:18 AM, Ray Jui <rjui@broadcom.com> wrote:
> 
>> This GPIO driver supports all 3 GPIO controllers in the Broadcom Cygnus
>> SoC. The 3 GPIO controllers are 1) the ASIU GPIO controller, 2) the
>> chipCommonG GPIO controller, and 3) the ALWAYS-ON GPIO controller
>>
>> Signed-off-by: Ray Jui <rjui@broadcom.com>
>> Reviewed-by: Scott Branden <sbranden@broadcom.com>
> 
> (Big thanks to Alexandre for doing the major part of the review,
> good work with following up so far!)
> 
> (...)
Yes, reviews from Alex and others are very helpful!

>> +config GPIO_BCM_CYGNUS
>> +       bool "Broadcom Cygnus GPIO support"
>> +       depends on ARCH_BCM_CYGNUS && OF_GPIO
> 
> select GPIOLIB_IRQCHIP
> 
> See more about this below.
> 
>> +++ b/drivers/gpio/gpio-bcm-cygnus.c
>> @@ -0,0 +1,607 @@
>> +/*
>> + * Copyright (C) 2014 Broadcom Corporation
>> + *
>> + * This program is free software; you can redistribute it and/or
>> + * modify it under the terms of the GNU General Public License as
>> + * published by the Free Software Foundation version 2.
>> + *
>> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
>> + * kind, whether express or implied; without even the implied warranty
>> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>> + * GNU General Public License for more details.
>> + */
>> +
>> +#include <linux/kernel.h>
>> +#include <linux/slab.h>
>> +#include <linux/module.h>
>> +#include <linux/irq.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/io.h>
>> +#include <linux/gpio.h>
>> +#include <linux/ioport.h>
>> +#include <linux/of_device.h>
>> +#include <linux/of_irq.h>
>> +#include <linux/irqchip/chained_irq.h>
> 
> Skip <linux/irq.h> and <linux/irqchip/chained_irq.h>
> as these move to the core with GPIOLIB_IRQCHIP
> 
Will do.

>> +#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
>> +#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
>> +#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
>> +#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
>> +#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
>> +#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
>> +#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
>> +#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
>> +#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
>> +#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
>> +#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
>> +#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
>> +
>> +/* drive strength control for ASIU GPIO */
>> +#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
>> +
>> +/* drive strength control for CCM GPIO */
>> +#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
> 
> This stuff (drive strength) is pin control, pin config.
> It does not belong in a pure GPIO driver. If you're
> making a combined pin control + GPIO driver, it
> shall be put in drivers/pinctrl/*
> 
Okay, I have some questions here. Are you suggesting me to register this
driver to both the pinctrl subsystem and gpiolib and move it to under
drivers/pinctrl/*? And obviously I should handle all pinctrl related
functions (drive strength, pull up/down, and etc.) using the standard
pinctrl bindings.

Or Are you suggesting me to combine this driver with the other Cygnus
pinctrl driver (which only supports pinmux)?

Note in Cygnus, all pinmux logic is done in the pinmux block. And there
are 3 GPIO controllers, that handle GPIO, drive strength of the GPIO
pins, internal pull up/down of the GPIO pins, which are handled in this
driver. So this driver is generic to all 3 GPIO controllers, as you can
see from the device tree bindings, there are 3 nodes.

Therefore, I think it makes sense to have one pinmux driver that handles
the pinmux block, and one generic pinctrl + gpio driver that handles
functions supported by all 3 GPIO controllers. Does this make sense to you?

>> +#define GPIO_BANK_SIZE 0x200
>> +#define NGPIOS_PER_BANK 32
>> +#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
>> +
>> +#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
>> +#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
>> +
>> +#define GPIO_FLAG_BIT_MASK           0xffff
>> +#define GPIO_PULL_BIT_SHIFT          16
>> +#define GPIO_PULL_BIT_MASK           0x3
>> +
>> +#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
>> +#define GPIO_DRV_STRENGTH_BITS       3
>> +#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
>> +
>> +/*
>> + * For GPIO internal pull up/down registers
>> + */
>> +enum gpio_pull {
>> +       GPIO_PULL_NONE = 0,
>> +       GPIO_PULL_UP,
>> +       GPIO_PULL_DOWN,
>> +       GPIO_PULL_INVALID,
>> +};
>> +
>> +/*
>> + * GPIO drive strength
>> + */
>> +enum gpio_drv_strength {
>> +       GPIO_DRV_STRENGTH_2MA = 0,
>> +       GPIO_DRV_STRENGTH_4MA,
>> +       GPIO_DRV_STRENGTH_6MA,
>> +       GPIO_DRV_STRENGTH_8MA,
>> +       GPIO_DRV_STRENGTH_10MA,
>> +       GPIO_DRV_STRENGTH_12MA,
>> +       GPIO_DRV_STRENGTH_14MA,
>> +       GPIO_DRV_STRENGTH_16MA,
>> +       GPIO_DRV_STRENGTH_INVALID,
>> +};
> 
> 
> All this pull up/down and drive strength is pin config for
> the pin control subsystem.
> 
Yes.

>> +struct cygnus_gpio {
>> +       struct device *dev;
>> +       void __iomem *base;
>> +       void __iomem *io_ctrl;
>> +       spinlock_t lock;
>> +       struct gpio_chip gc;
>> +       unsigned num_banks;
>> +       int irq;
>> +       struct irq_domain *irq_domain;
> 
> Skip irq and irqdomain and use GPIOLIB_IRQCHIP
> 
Will switch to GPIOLIB_IRQCHIP.

>> +static u32 cygnus_readl(struct cygnus_gpio *cygnus_gpio, unsigned int offset)
>> +{
>> +       return readl(cygnus_gpio->base + offset);
>> +}
>> +
>> +static void cygnus_writel(struct cygnus_gpio *cygnus_gpio,
>> +                         unsigned int offset, u32 val)
>> +{
>> +       writel(val, cygnus_gpio->base + offset);
>> +}
> 
> I don't see the value of using these accessors over just inlining
> your readl/writel stuff.
> 
> (...)
Hmmm....I can change this back to simply readl/writel

>> +static int cygnus_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
>> +{
>> +       struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
>> +
>> +       return irq_find_mapping(cygnus_gpio->irq_domain, offset);
>> +}
> 
> This goes away to the core with GPIOLIB_IRQCHIP
> 
Okay, thanks!

>> +static void cygnus_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
>> +{
>> +       struct cygnus_gpio *cygnus_gpio;
>> +       struct irq_chip *chip = irq_desc_get_chip(desc);
>> +       int i, bit;
>> +
>> +       chained_irq_enter(chip, desc);
>> +
>> +       cygnus_gpio = irq_get_handler_data(irq);
>> +
>> +       /* go through the entire GPIO banks and handle all interrupts */
>> +       for (i = 0; i < cygnus_gpio->num_banks; i++) {
>> +               unsigned long val = cygnus_readl(cygnus_gpio,
>> +                               (i * GPIO_BANK_SIZE) +
>> +                               CYGNUS_GPIO_INT_MSTAT_OFFSET);
>> +
>> +               for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
>> +                       unsigned pin = NGPIOS_PER_BANK * i + bit;
>> +                       int child_irq =
>> +                               cygnus_gpio_to_irq(&cygnus_gpio->gc, pin);
>> +
>> +                       /*
>> +                        * Clear the interrupt before invoking the
>> +                        * handler, so we do not leave any window
>> +                        */
>> +                       cygnus_writel(cygnus_gpio, (i * GPIO_BANK_SIZE) +
>> +                               CYGNUS_GPIO_INT_CLR_OFFSET, BIT(bit));
>> +
>> +                       generic_handle_irq(child_irq);
>> +               }
>> +       }
>> +
>> +       chained_irq_exit(chip, desc);
>> +}
> 
> Looks good, but you will need to have the struct gpio_chip * as
> handler data to use GPIOLIB_IRQCHIP, so get from there to
> the struct cygnus_gpio something like:
> 
> struct gpio_chip *gc = irq_desc_get_handler_data(desc);
> struct cygnus_gpio *cyg = to_cygnus_gpio(gc);
> 
Okay thanks!

>> +static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
>> +{
>> +       struct cygnus_gpio *cygnus_gpio = to_cygnus_gpio(gc);
>> +       unsigned int offset = CYGNUS_GPIO_REG(gpio,
>> +                       CYGNUS_GPIO_DATA_IN_OFFSET);
>> +       unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
>> +       u32 val;
>> +
>> +       val = cygnus_readl(cygnus_gpio, offset);
>> +       val = (val >> shift) & 1;
> 
> No, do this:
> 
> return !!(cygnus_readl(cygnus_gpio, offset) & BIT(shift));
> 
> Maybe rename the "shift" variable to "bit" or just use the macro
> directly in the readl().
> 
Will do!

>> +static int cygnus_gpio_irq_map(struct irq_domain *d, unsigned int irq,
>> +                              irq_hw_number_t hwirq)
>> +{
>> +       int ret;
>> +
>> +       ret = irq_set_chip_data(irq, d->host_data);
>> +       if (ret < 0)
>> +               return ret;
>> +       irq_set_lockdep_class(irq, &gpio_lock_class);
>> +       irq_set_chip_and_handler(irq, &cygnus_gpio_irq_chip,
>> +                       handle_simple_irq);
>> +       set_irq_flags(irq, IRQF_VALID);
>> +
>> +       return 0;
>> +}
>> +
>> +static void cygnus_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
>> +{
>> +       irq_set_chip_and_handler(irq, NULL, NULL);
>> +       irq_set_chip_data(irq, NULL);
>> +}
>> +
>> +static struct irq_domain_ops cygnus_irq_ops = {
>> +       .map = cygnus_gpio_irq_map,
>> +       .unmap = cygnus_gpio_irq_unmap,
>> +       .xlate = irq_domain_xlate_twocell,
>> +};
> 
> All this goes away with GPIOLIB_IRQCHIP (that is what is good about it).
> 
Great!

>> +#ifdef CONFIG_OF_GPIO
> 
> What, that should be defined all the time, you depend on it in
> Kconfig!
> 
Yes. Will get rid of this

>> +static void cygnus_gpio_set_pull(struct cygnus_gpio *cygnus_gpio,
>> +                                unsigned gpio, enum gpio_pull pull)
> (...)
>> +static void cygnus_gpio_set_strength(struct cygnus_gpio *cygnus_gpio,
>> +               unsigned gpio, enum gpio_drv_strength strength)
> (...)
>> +static int cygnus_gpio_of_xlate(struct gpio_chip *gc,
>> +               const struct of_phandle_args *gpiospec, u32 *flags)
> 
> NAK. This is pin control, put this in the pin control driver.
> 
> I guess the same that is part of this patch series.
> 
> (...)
Agreed.

>> +static int cygnus_gpio_probe(struct platform_device *pdev)
>> +{
>> +       struct device *dev = &pdev->dev;
>> +       struct resource *res;
>> +       struct cygnus_gpio *cygnus_gpio;
>> +       struct gpio_chip *gc;
>> +       u32 i, ngpios;
>> +       int ret;
>> +
>> +       cygnus_gpio = devm_kzalloc(dev, sizeof(*cygnus_gpio), GFP_KERNEL);
>> +       if (!cygnus_gpio)
>> +               return -ENOMEM;
>> +
>> +       cygnus_gpio->dev = dev;
>> +       platform_set_drvdata(pdev, cygnus_gpio);
>> +
>> +       if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
>> +               dev_err(&pdev->dev, "missing ngpios DT property\n");
>> +               return -ENODEV;
>> +       }
>> +       cygnus_gpio->num_banks = (ngpios + NGPIOS_PER_BANK - 1) /
>> +               NGPIOS_PER_BANK;
>> +
>> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> +       cygnus_gpio->base = devm_ioremap_resource(dev, res);
>> +       if (IS_ERR(cygnus_gpio->base)) {
>> +               dev_err(&pdev->dev, "unable to map I/O memory\n");
>> +               return PTR_ERR(cygnus_gpio->base);
>> +       }
>> +
>> +       /*
>> +        * Only certain types of Cygnus GPIO interfaces have I/O control
>> +        * registers
>> +        */
>> +       res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
>> +       if (res) {
>> +               cygnus_gpio->io_ctrl = devm_ioremap_resource(dev, res);
>> +               if (IS_ERR(cygnus_gpio->io_ctrl)) {
>> +                       dev_err(&pdev->dev, "unable to map I/O memory\n");
>> +                       return PTR_ERR(cygnus_gpio->io_ctrl);
>> +               }
>> +       }
> 
> This is a good indication that it's a separate piece of HW and should
> be a separate pin control driver.
> 
Okay.

>> +
>> +       spin_lock_init(&cygnus_gpio->lock);
>> +
>> +       gc = &cygnus_gpio->gc;
>> +       gc->base = -1;
>> +       gc->ngpio = ngpios;
>> +       gc->label = dev_name(dev);
>> +       gc->dev = dev;
>> +#ifdef CONFIG_OF_GPIO
> 
> You depend on this symbol.
> 
Will get rid of it.

>> +       gc->of_node = dev->of_node;
>> +       gc->of_gpio_n_cells = 2;
>> +       gc->of_xlate = cygnus_gpio_of_xlate;
>> +#endif
>> +       gc->direction_input = cygnus_gpio_direction_input;
>> +       gc->direction_output = cygnus_gpio_direction_output;
>> +       gc->set = cygnus_gpio_set;
>> +       gc->get = cygnus_gpio_get;
>> +       gc->to_irq = cygnus_gpio_to_irq;
>> +
>> +       ret = gpiochip_add(gc);
>> +       if (ret < 0) {
>> +               dev_err(&pdev->dev, "unable to add GPIO chip\n");
>> +               return ret;
>> +       }
>> +
>> +       /*
>> +        * Some of the GPIO interfaces do not have interrupt wired to the main
>> +        * processor
>> +        */
>> +       cygnus_gpio->irq = platform_get_irq(pdev, 0);
>> +       if (cygnus_gpio->irq < 0) {
>> +               ret = cygnus_gpio->irq;
>> +               if (ret == -EPROBE_DEFER)
>> +                       goto err_rm_gpiochip;
>> +
>> +               dev_info(&pdev->dev, "no interrupt hook\n");
>> +       }
> 
> From here:
> 
>> +       cygnus_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
>> +                       gc->ngpio, &cygnus_irq_ops, cygnus_gpio);
>> +       if (!cygnus_gpio->irq_domain) {
>> +               dev_err(&pdev->dev, "unable to allocate IRQ domain\n");
>> +               ret = -ENXIO;
>> +               goto err_rm_gpiochip;
>> +       }
>> +
>> +       for (i = 0; i < gc->ngpio; i++) {
>> +               int irq = irq_create_mapping(cygnus_gpio->irq_domain, i);
>> +
>> +               irq_set_lockdep_class(irq, &gpio_lock_class);
>> +               irq_set_chip_data(irq, cygnus_gpio);
>> +               irq_set_chip_and_handler(irq, &cygnus_gpio_irq_chip,
>> +                               handle_simple_irq);
>> +               set_irq_flags(irq, IRQF_VALID);
>> +       }
>> +
>> +       irq_set_chained_handler(cygnus_gpio->irq, cygnus_gpio_irq_handler);
>> +       irq_set_handler_data(cygnus_gpio->irq, cygnus_gpio);
> 
> To here, replace with a single call to
> gpiochip_set_chained_irqchip(chip *, irq_chip *, irq, handler)...
This is excellent! Thanks!

> 
> Look at other drivers using GPIOLIB_IRQCHIP for inspiration.
> 
> Yours,
> Linus Walleij
> 

Re: [PATCH v6 2/3] gpio: Cygnus: add GPIO driver

[Linus Walleij]

On Tue, Jan 13, 2015 at 6:05 PM, Ray Jui <rjui@broadcom.com> wrote:
> On 1/13/2015 12:53 AM, Linus Walleij wrote:
>> On Tue, Dec 16, 2014 at 3:18 AM, Ray Jui <rjui@broadcom.com> wrote:
>>
>>> +/* drive strength control for ASIU GPIO */
>>> +#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
>>> +
>>> +/* drive strength control for CCM GPIO */
>>> +#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
>>
>> This stuff (drive strength) is pin control, pin config.
>> It does not belong in a pure GPIO driver. If you're
>> making a combined pin control + GPIO driver, it
>> shall be put in drivers/pinctrl/*
>>
> Okay, I have some questions here. Are you suggesting me to register this
> driver to both the pinctrl subsystem and gpiolib and move it to under
> drivers/pinctrl/*?

Either you can have a combined driver in drivers/pinctrl/*
which has one probe() function calling pinctrl_register(),
gpiochip_add(), gpiochip_add_pin_range(), having the gpio
parts call into the pin control backend with
pinctrl_request_gpio(), pinctrl_free_gpio(),
pinctrl_gpio_direction_input(), pinctrl_gpio_direction_output().

Or you can split it in one driver in drivers/pinctrl/*
dealing with just the pin control stuff, and another driver
in drivers/gpio/* dealing with the GPIO stuff, each with one
probe() function.

If they are using the same register range, the first approach
is probably most intuitive. If the pin control and GPIO parts
are separated in different register ranges, probably the
second approach is the best.

> Or Are you suggesting me to combine this driver with the other Cygnus
> pinctrl driver (which only supports pinmux)?

Depends on which hardware block the pin control-like
registers belongs in. See per above.

> Note in Cygnus, all pinmux logic is done in the pinmux block. And there
> are 3 GPIO controllers, that handle GPIO, drive strength of the GPIO
> pins, internal pull up/down of the GPIO pins, which are handled in this
> driver. So this driver is generic to all 3 GPIO controllers, as you can
> see from the device tree bindings, there are 3 nodes.
>
> Therefore, I think it makes sense to have one pinmux driver that handles
> the pinmux block, and one generic pinctrl + gpio driver that handles
> functions supported by all 3 GPIO controllers. Does this make sense to you?

Yep.

Some hardware designs put the software-controlled biasing
resistors in the GPIO block electronically connected to the actual
pins, so that e.g. the biasing will be available if some MMC or
whatever is using the same pins in another muxing. In such
situations it's quite evident that they need to be a combined
GPIO and pin controller.

I have some regrets that bolting a second pin controller to the
GPIO chip make things a bit complex but it's a price we have
to pay for getting some kind of generic interface.

Yours,
Linus Walleij

Re: [PATCH v6 2/3] gpio: Cygnus: add GPIO driver

[Ray Jui]

On 1/16/2015 2:14 AM, Linus Walleij wrote:
> On Tue, Jan 13, 2015 at 6:05 PM, Ray Jui <rjui@broadcom.com> wrote:
>> On 1/13/2015 12:53 AM, Linus Walleij wrote:
>>> On Tue, Dec 16, 2014 at 3:18 AM, Ray Jui <rjui@broadcom.com> wrote:
>>>
>>>> +/* drive strength control for ASIU GPIO */
>>>> +#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
>>>> +
>>>> +/* drive strength control for CCM GPIO */
>>>> +#define CYGNUS_GPIO_CCM_DRV0_CTRL_OFFSET  0x00
>>>
>>> This stuff (drive strength) is pin control, pin config.
>>> It does not belong in a pure GPIO driver. If you're
>>> making a combined pin control + GPIO driver, it
>>> shall be put in drivers/pinctrl/*
>>>
>> Okay, I have some questions here. Are you suggesting me to register this
>> driver to both the pinctrl subsystem and gpiolib and move it to under
>> drivers/pinctrl/*?
> 
> Either you can have a combined driver in drivers/pinctrl/*
> which has one probe() function calling pinctrl_register(),
> gpiochip_add(), gpiochip_add_pin_range(), having the gpio
> parts call into the pin control backend with
> pinctrl_request_gpio(), pinctrl_free_gpio(),
> pinctrl_gpio_direction_input(), pinctrl_gpio_direction_output().
> 
> Or you can split it in one driver in drivers/pinctrl/*
> dealing with just the pin control stuff, and another driver
> in drivers/gpio/* dealing with the GPIO stuff, each with one
> probe() function.
> 
> If they are using the same register range, the first approach
> is probably most intuitive. If the pin control and GPIO parts
> are separated in different register ranges, probably the
> second approach is the best.
> 
>> Or Are you suggesting me to combine this driver with the other Cygnus
>> pinctrl driver (which only supports pinmux)?
> 
> Depends on which hardware block the pin control-like
> registers belongs in. See per above.
> 
>> Note in Cygnus, all pinmux logic is done in the pinmux block. And there
>> are 3 GPIO controllers, that handle GPIO, drive strength of the GPIO
>> pins, internal pull up/down of the GPIO pins, which are handled in this
>> driver. So this driver is generic to all 3 GPIO controllers, as you can
>> see from the device tree bindings, there are 3 nodes.
>>
>> Therefore, I think it makes sense to have one pinmux driver that handles
>> the pinmux block, and one generic pinctrl + gpio driver that handles
>> functions supported by all 3 GPIO controllers. Does this make sense to you?
> 
> Yep.
> 
> Some hardware designs put the software-controlled biasing
> resistors in the GPIO block electronically connected to the actual
> pins, so that e.g. the biasing will be available if some MMC or
> whatever is using the same pins in another muxing. In such
> situations it's quite evident that they need to be a combined
> GPIO and pin controller.
> 
> I have some regrets that bolting a second pin controller to the
> GPIO chip make things a bit complex but it's a price we have
> to pay for getting some kind of generic interface.
> 
> Yours,
> Linus Walleij
> 
Okay. In summary, I think both of us think the following approach makes
sense in my situation:
- leave pinmux in pinctrl-bcm-cygnus.c
- leave pinctrl + gpio in pinctrl-bcm-cygnus-gpio.c under drivers/pinctrl/*

But by thinking about this more, I thought this would create duplicated
pinctrl descriptors in our system, one from the pinmux driver, and the
other from this pinctrl+gpio driver. That is probably undesirable?

By reviewing various drivers in the pinctrl directory, I found what
pinctrl-u300.c and pinctrl-coh901.c does seems to serve as a good model
for me to follow:
- pinctrl-u300.c is the pinmux driver
- pinctrl-coh901.c is the gpio+pinctrl driver

The GPIO pinctrl logic is in the coh901 block, so pinctrl-coh901.c
exposed two public functions u300_gpio_config_get, u300_gpio_config_set
that pinctrl-u300.c can use. The u300 populates all pinmux/pinctrl
related functions into the subsystem. This way there's only one pinctrl
descriptor, populated through pinctrl-u300.c.

Does that model make more sense to you?

Thanks,

Ray

Re: [PATCH v6 2/3] gpio: Cygnus: add GPIO driver

[Linus Walleij]

On Sat, Jan 17, 2015 at 1:11 AM, Ray Jui <rjui@broadcom.com> wrote:
> On 1/16/2015 2:14 AM, Linus Walleij wrote:

>> Some hardware designs put the software-controlled biasing
>> resistors in the GPIO block electronically connected to the actual
>> pins, so that e.g. the biasing will be available if some MMC or
>> whatever is using the same pins in another muxing. In such
>> situations it's quite evident that they need to be a combined
>> GPIO and pin controller.
>>
>> I have some regrets that bolting a second pin controller to the
>> GPIO chip make things a bit complex but it's a price we have
>> to pay for getting some kind of generic interface.
>
> Okay. In summary, I think both of us think the following approach makes
> sense in my situation:
> - leave pinmux in pinctrl-bcm-cygnus.c
> - leave pinctrl + gpio in pinctrl-bcm-cygnus-gpio.c under drivers/pinctrl/*
>
> But by thinking about this more, I thought this would create duplicated
> pinctrl descriptors in our system, one from the pinmux driver, and the
> other from this pinctrl+gpio driver. That is probably undesirable?

No, there are several systems with multiple pin controllers and the
framework easily handles multiple pin controllers in the same
system just as well as we handle multiple GPIO chips.

> By reviewing various drivers in the pinctrl directory, I found what
> pinctrl-u300.c and pinctrl-coh901.c does seems to serve as a good model
> for me to follow:
> - pinctrl-u300.c is the pinmux driver
> - pinctrl-coh901.c is the gpio+pinctrl driver

Yeah, I don't know if the separation between them is as beautiful
as it should be. I used it when developing the pin control
subsystem.

> The GPIO pinctrl logic is in the coh901 block, so pinctrl-coh901.c
> exposed two public functions u300_gpio_config_get, u300_gpio_config_set
> that pinctrl-u300.c can use. The u300 populates all pinmux/pinctrl
> related functions into the subsystem. This way there's only one pinctrl
> descriptor, populated through pinctrl-u300.c.
>
> Does that model make more sense to you?

Yeah I wrote it myself so I'm maybe blind for any dumbness in
the code. But I think it's kind of elegant. But it is not using the
generic pinctrl device tree bindings so it's kind of oldstyle and
bloated in that sense.

Yours,
Linus Walleij

Re: [PATCH v6 2/3] gpio: Cygnus: add GPIO driver

[Ray Jui]

On 1/20/2015 1:53 AM, Linus Walleij wrote:
> On Sat, Jan 17, 2015 at 1:11 AM, Ray Jui <rjui@broadcom.com> wrote:
>> On 1/16/2015 2:14 AM, Linus Walleij wrote:
> 
>>> Some hardware designs put the software-controlled biasing
>>> resistors in the GPIO block electronically connected to the actual
>>> pins, so that e.g. the biasing will be available if some MMC or
>>> whatever is using the same pins in another muxing. In such
>>> situations it's quite evident that they need to be a combined
>>> GPIO and pin controller.
>>>
>>> I have some regrets that bolting a second pin controller to the
>>> GPIO chip make things a bit complex but it's a price we have
>>> to pay for getting some kind of generic interface.
>>
>> Okay. In summary, I think both of us think the following approach makes
>> sense in my situation:
>> - leave pinmux in pinctrl-bcm-cygnus.c
>> - leave pinctrl + gpio in pinctrl-bcm-cygnus-gpio.c under drivers/pinctrl/*
>>
>> But by thinking about this more, I thought this would create duplicated
>> pinctrl descriptors in our system, one from the pinmux driver, and the
>> other from this pinctrl+gpio driver. That is probably undesirable?
> 
> No, there are several systems with multiple pin controllers and the
> framework easily handles multiple pin controllers in the same
> system just as well as we handle multiple GPIO chips.
> 
>> By reviewing various drivers in the pinctrl directory, I found what
>> pinctrl-u300.c and pinctrl-coh901.c does seems to serve as a good model
>> for me to follow:
>> - pinctrl-u300.c is the pinmux driver
>> - pinctrl-coh901.c is the gpio+pinctrl driver
> 
> Yeah, I don't know if the separation between them is as beautiful
> as it should be. I used it when developing the pin control
> subsystem.
> 
>> The GPIO pinctrl logic is in the coh901 block, so pinctrl-coh901.c
>> exposed two public functions u300_gpio_config_get, u300_gpio_config_set
>> that pinctrl-u300.c can use. The u300 populates all pinmux/pinctrl
>> related functions into the subsystem. This way there's only one pinctrl
>> descriptor, populated through pinctrl-u300.c.
>>
>> Does that model make more sense to you?
> 
> Yeah I wrote it myself so I'm maybe blind for any dumbness in
> the code. But I think it's kind of elegant. But it is not using the
> generic pinctrl device tree bindings so it's kind of oldstyle and
> bloated in that sense.
> 
> Yours,
> Linus Walleij
> 
Okay. I think I have a pretty good idea of what you expect. Regarding
whether or not to keep pinctrl-bcm-cygnus.c and
pinctrl-bcm-cygnus-gpio.c completely independent with each other and
therefore have two pinctrl in the system, I'll play with it a bit more
and make a decision.

Thanks a lot for spending all these time explaining it to me. Really
appreciate it!

[PATCH v6 3/3] ARM: dts: enable GPIO for Broadcom Cygnus

[Ray Jui]

This enables all 3 GPIO controllers including the ASIU GPIO, the
chipcommonG GPIO, and the ALWAYS-ON GPIO, for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |   30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..fbc8257 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,36 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x1800a000 0x50>,
+			<0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <122>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		no-drv-strength;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

Re: [PATCH v6 0/3] Add gpio support to Broadcom Cygnus SoC

[Arnd Bergmann]

On Monday 15 December 2014 18:18:24 Ray Jui wrote:
> This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
> Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
> and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
> the same Cygnus GPIO driver
> 
> 

Looks good to me now.

	Arnd

Re: [PATCH v6 0/3] Add gpio support to Broadcom Cygnus SoC

[Alexandre Courbot]

On Tue, Dec 16, 2014 at 11:18 AM, Ray Jui <rjui@broadcom.com> wrote:
> This patchset contains the initial GPIO support for the Broadcom Cygnus SoC.
> Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
> and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
> the same Cygnus GPIO driver

No objections for this v6. The series,

Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>

[PATCH v4 0/4] Add pinctrl support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial pinctrl (IOMUX) support for the Broadcom
Cygnus SoC. The Cygnus IOMUX controller supports group based mux configuration
and allows certain pins to be muxed to GPIO function individually

Changes from v3:
 - Fix the driver to have more proper use of "const" in various places
 - Other minor improvements

Changes from v2:
 - Consolidate all Broadcom pinctrl drivers into drivers/pinctrl/bcm/*
 - Change the Cygnus IOMUX driver to use standard Linux pinctrl subnode
properties such as "function" and "groups" for pinmux configuration, instead
of non-standard properties such as "brcm,function" and "brcm,group"
 - Use real function names like "spi0", "lcd", "key", and etc. instead of HW
specific mux names like "alt1", "alt2", "alt3", and etc.
 - Add suffix "grp" to all group names
 - Add support to allow individual pins to be muxed to GPIO function through
subsystem callbacks "gpio_request_enable" and "gpio_disable_free", and get rid
of all GPIO groups
 - Other minor improvements in the driver

Changes from v1:
 - Fix a typo in device tree binding document

Ray Jui (4):
  pinctrl: bcm: consolidate Broadcom pinctrl drivers
  pinctrl: Broadcom Cygnus pinctrl device tree binding
  pinctrl: cygnus: add initial IOMUX driver support
  ARM: dts: enable IOMUX for Broadcom Cygnus

 .../bindings/pinctrl/brcm,cygnus-pinmux.txt        |  157 +++
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |    6 +
 drivers/pinctrl/Kconfig                            |   19 +-
 drivers/pinctrl/Makefile                           |    4 +-
 drivers/pinctrl/bcm/Kconfig                        |   34 +
 drivers/pinctrl/bcm/Makefile                       |    5 +
 drivers/pinctrl/bcm/pinctrl-bcm281xx.c             | 1455 ++++++++++++++++++++
 drivers/pinctrl/bcm/pinctrl-bcm2835.c              | 1072 ++++++++++++++
 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c           | 1088 +++++++++++++++
 drivers/pinctrl/pinctrl-bcm281xx.c                 | 1455 --------------------
 drivers/pinctrl/pinctrl-bcm2835.c                  | 1072 --------------
 11 files changed, 3820 insertions(+), 2547 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt
 create mode 100644 drivers/pinctrl/bcm/Kconfig
 create mode 100644 drivers/pinctrl/bcm/Makefile
 create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm281xx.c
 create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm2835.c
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
 delete mode 100644 drivers/pinctrl/pinctrl-bcm281xx.c
 delete mode 100644 drivers/pinctrl/pinctrl-bcm2835.c

-- 
1.7.9.5

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[PATCH v4 1/4] pinctrl: bcm: consolidate Broadcom pinctrl drivers

[Ray Jui]

Consolidate Broadcom pinctrl drivers into drivers/pinctrl/bcm/*

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 drivers/pinctrl/Kconfig                |   19 +-
 drivers/pinctrl/Makefile               |    4 +-
 drivers/pinctrl/bcm/Kconfig            |   21 +
 drivers/pinctrl/bcm/Makefile           |    4 +
 drivers/pinctrl/bcm/pinctrl-bcm281xx.c | 1455 ++++++++++++++++++++++++++++++++
 drivers/pinctrl/bcm/pinctrl-bcm2835.c  | 1072 +++++++++++++++++++++++
 drivers/pinctrl/pinctrl-bcm281xx.c     | 1455 --------------------------------
 drivers/pinctrl/pinctrl-bcm2835.c      | 1072 -----------------------
 8 files changed, 2555 insertions(+), 2547 deletions(-)
 create mode 100644 drivers/pinctrl/bcm/Kconfig
 create mode 100644 drivers/pinctrl/bcm/Makefile
 create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm281xx.c
 create mode 100644 drivers/pinctrl/bcm/pinctrl-bcm2835.c
 delete mode 100644 drivers/pinctrl/pinctrl-bcm281xx.c
 delete mode 100644 drivers/pinctrl/pinctrl-bcm2835.c

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index d014f22..6cfdad7 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -67,24 +67,6 @@ config PINCTRL_AT91
 	help
 	  Say Y here to enable the at91 pinctrl driver
 
-config PINCTRL_BCM2835
-	bool
-	select PINMUX
-	select PINCONF
-
-config PINCTRL_BCM281XX
-	bool "Broadcom BCM281xx pinctrl driver"
-	depends on OF && (ARCH_BCM_MOBILE || COMPILE_TEST)
-	select PINMUX
-	select PINCONF
-	select GENERIC_PINCONF
-	select REGMAP_MMIO
-	help
-	  Say Y here to support Broadcom BCM281xx pinctrl driver, which is used
-	  for the BCM281xx SoC family, including BCM11130, BCM11140, BCM11351,
-	  BCM28145, and BCM28155 SoCs.  This driver requires the pinctrl
-	  framework.  GPIO is provided by a separate GPIO driver.
-
 config PINCTRL_LANTIQ
 	bool
 	depends on LANTIQ
@@ -191,6 +173,7 @@ config PINCTRL_PALMAS
 	  open drain configuration for the Palmas series devices like
 	  TPS65913, TPS80036 etc.
 
+source "drivers/pinctrl/bcm/Kconfig"
 source "drivers/pinctrl/berlin/Kconfig"
 source "drivers/pinctrl/freescale/Kconfig"
 source "drivers/pinctrl/intel/Kconfig"
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index c030b3d..c018bbf 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -14,8 +14,6 @@ obj-$(CONFIG_PINCTRL_AS3722)	+= pinctrl-as3722.o
 obj-$(CONFIG_PINCTRL_BF54x)	+= pinctrl-adi2-bf54x.o
 obj-$(CONFIG_PINCTRL_BF60x)	+= pinctrl-adi2-bf60x.o
 obj-$(CONFIG_PINCTRL_AT91)	+= pinctrl-at91.o
-obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
-obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
 obj-$(CONFIG_PINCTRL_FALCON)	+= pinctrl-falcon.o
 obj-$(CONFIG_PINCTRL_PALMAS)	+= pinctrl-palmas.o
 obj-$(CONFIG_PINCTRL_ROCKCHIP)	+= pinctrl-rockchip.o
@@ -36,6 +34,8 @@ obj-$(CONFIG_PINCTRL_LANTIQ)	+= pinctrl-lantiq.o
 obj-$(CONFIG_PINCTRL_TB10X)	+= pinctrl-tb10x.o
 obj-$(CONFIG_PINCTRL_ST) 	+= pinctrl-st.o
 
+obj-$(CONFIG_ARCH_BCM)		+= bcm/
+obj-$(CONFIG_ARCH_BCM2835)	+= bcm/
 obj-$(CONFIG_ARCH_BERLIN)	+= berlin/
 obj-y				+= freescale/
 obj-$(CONFIG_X86)		+= intel/
diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
new file mode 100644
index 0000000..bc6d048
--- /dev/null
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -0,0 +1,21 @@
+#
+# Broadcom pinctrl drivers
+#
+
+config PINCTRL_BCM281XX
+	bool "Broadcom BCM281xx pinctrl driver"
+	depends on OF && (ARCH_BCM_MOBILE || COMPILE_TEST)
+	select PINMUX
+	select PINCONF
+	select GENERIC_PINCONF
+	select REGMAP_MMIO
+	help
+	  Say Y here to support Broadcom BCM281xx pinctrl driver, which is used
+	  for the BCM281xx SoC family, including BCM11130, BCM11140, BCM11351,
+	  BCM28145, and BCM28155 SoCs.  This driver requires the pinctrl
+	  framework.  GPIO is provided by a separate GPIO driver.
+
+config PINCTRL_BCM2835
+	bool
+	select PINMUX
+	select PINCONF
diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
new file mode 100644
index 0000000..7ba80a3
--- /dev/null
+++ b/drivers/pinctrl/bcm/Makefile
@@ -0,0 +1,4 @@
+# Broadcom pinctrl support
+
+obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
+obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
diff --git a/drivers/pinctrl/bcm/pinctrl-bcm281xx.c b/drivers/pinctrl/bcm/pinctrl-bcm281xx.c
new file mode 100644
index 0000000..73d99076
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-bcm281xx.c
@@ -0,0 +1,1455 @@
+/*
+ * Copyright (C) 2013 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include "../core.h"
+#include "../pinctrl-utils.h"
+
+/* BCM281XX Pin Control Registers Definitions */
+
+/* Function Select bits are the same for all pin control registers */
+#define BCM281XX_PIN_REG_F_SEL_MASK		0x0700
+#define BCM281XX_PIN_REG_F_SEL_SHIFT		8
+
+/* Standard pin register */
+#define BCM281XX_STD_PIN_REG_DRV_STR_MASK	0x0007
+#define BCM281XX_STD_PIN_REG_DRV_STR_SHIFT	0
+#define BCM281XX_STD_PIN_REG_INPUT_DIS_MASK	0x0008
+#define BCM281XX_STD_PIN_REG_INPUT_DIS_SHIFT	3
+#define BCM281XX_STD_PIN_REG_SLEW_MASK		0x0010
+#define BCM281XX_STD_PIN_REG_SLEW_SHIFT		4
+#define BCM281XX_STD_PIN_REG_PULL_UP_MASK	0x0020
+#define BCM281XX_STD_PIN_REG_PULL_UP_SHIFT	5
+#define BCM281XX_STD_PIN_REG_PULL_DN_MASK	0x0040
+#define BCM281XX_STD_PIN_REG_PULL_DN_SHIFT	6
+#define BCM281XX_STD_PIN_REG_HYST_MASK		0x0080
+#define BCM281XX_STD_PIN_REG_HYST_SHIFT		7
+
+/* I2C pin register */
+#define BCM281XX_I2C_PIN_REG_INPUT_DIS_MASK	0x0004
+#define BCM281XX_I2C_PIN_REG_INPUT_DIS_SHIFT	2
+#define BCM281XX_I2C_PIN_REG_SLEW_MASK		0x0008
+#define BCM281XX_I2C_PIN_REG_SLEW_SHIFT		3
+#define BCM281XX_I2C_PIN_REG_PULL_UP_STR_MASK	0x0070
+#define BCM281XX_I2C_PIN_REG_PULL_UP_STR_SHIFT	4
+
+/* HDMI pin register */
+#define BCM281XX_HDMI_PIN_REG_INPUT_DIS_MASK	0x0008
+#define BCM281XX_HDMI_PIN_REG_INPUT_DIS_SHIFT	3
+#define BCM281XX_HDMI_PIN_REG_MODE_MASK		0x0010
+#define BCM281XX_HDMI_PIN_REG_MODE_SHIFT	4
+
+/**
+ * bcm281xx_pin_type - types of pin register
+ */
+enum bcm281xx_pin_type {
+	BCM281XX_PIN_TYPE_UNKNOWN = 0,
+	BCM281XX_PIN_TYPE_STD,
+	BCM281XX_PIN_TYPE_I2C,
+	BCM281XX_PIN_TYPE_HDMI,
+};
+
+static enum bcm281xx_pin_type std_pin = BCM281XX_PIN_TYPE_STD;
+static enum bcm281xx_pin_type i2c_pin = BCM281XX_PIN_TYPE_I2C;
+static enum bcm281xx_pin_type hdmi_pin = BCM281XX_PIN_TYPE_HDMI;
+
+/**
+ * bcm281xx_pin_function- define pin function
+ */
+struct bcm281xx_pin_function {
+	const char *name;
+	const char * const *groups;
+	const unsigned ngroups;
+};
+
+/**
+ * bcm281xx_pinctrl_data - Broadcom-specific pinctrl data
+ * @reg_base - base of pinctrl registers
+ */
+struct bcm281xx_pinctrl_data {
+	void __iomem *reg_base;
+
+	/* List of all pins */
+	const struct pinctrl_pin_desc *pins;
+	const unsigned npins;
+
+	const struct bcm281xx_pin_function *functions;
+	const unsigned nfunctions;
+
+	struct regmap *regmap;
+};
+
+/*
+ * Pin number definition.  The order here must be the same as defined in the
+ * PADCTRLREG block in the RDB.
+ */
+#define BCM281XX_PIN_ADCSYNC		0
+#define BCM281XX_PIN_BAT_RM		1
+#define BCM281XX_PIN_BSC1_SCL		2
+#define BCM281XX_PIN_BSC1_SDA		3
+#define BCM281XX_PIN_BSC2_SCL		4
+#define BCM281XX_PIN_BSC2_SDA		5
+#define BCM281XX_PIN_CLASSGPWR		6
+#define BCM281XX_PIN_CLK_CX8		7
+#define BCM281XX_PIN_CLKOUT_0		8
+#define BCM281XX_PIN_CLKOUT_1		9
+#define BCM281XX_PIN_CLKOUT_2		10
+#define BCM281XX_PIN_CLKOUT_3		11
+#define BCM281XX_PIN_CLKREQ_IN_0	12
+#define BCM281XX_PIN_CLKREQ_IN_1	13
+#define BCM281XX_PIN_CWS_SYS_REQ1	14
+#define BCM281XX_PIN_CWS_SYS_REQ2	15
+#define BCM281XX_PIN_CWS_SYS_REQ3	16
+#define BCM281XX_PIN_DIGMIC1_CLK	17
+#define BCM281XX_PIN_DIGMIC1_DQ		18
+#define BCM281XX_PIN_DIGMIC2_CLK	19
+#define BCM281XX_PIN_DIGMIC2_DQ		20
+#define BCM281XX_PIN_GPEN13		21
+#define BCM281XX_PIN_GPEN14		22
+#define BCM281XX_PIN_GPEN15		23
+#define BCM281XX_PIN_GPIO00		24
+#define BCM281XX_PIN_GPIO01		25
+#define BCM281XX_PIN_GPIO02		26
+#define BCM281XX_PIN_GPIO03		27
+#define BCM281XX_PIN_GPIO04		28
+#define BCM281XX_PIN_GPIO05		29
+#define BCM281XX_PIN_GPIO06		30
+#define BCM281XX_PIN_GPIO07		31
+#define BCM281XX_PIN_GPIO08		32
+#define BCM281XX_PIN_GPIO09		33
+#define BCM281XX_PIN_GPIO10		34
+#define BCM281XX_PIN_GPIO11		35
+#define BCM281XX_PIN_GPIO12		36
+#define BCM281XX_PIN_GPIO13		37
+#define BCM281XX_PIN_GPIO14		38
+#define BCM281XX_PIN_GPS_PABLANK	39
+#define BCM281XX_PIN_GPS_TMARK		40
+#define BCM281XX_PIN_HDMI_SCL		41
+#define BCM281XX_PIN_HDMI_SDA		42
+#define BCM281XX_PIN_IC_DM		43
+#define BCM281XX_PIN_IC_DP		44
+#define BCM281XX_PIN_KP_COL_IP_0	45
+#define BCM281XX_PIN_KP_COL_IP_1	46
+#define BCM281XX_PIN_KP_COL_IP_2	47
+#define BCM281XX_PIN_KP_COL_IP_3	48
+#define BCM281XX_PIN_KP_ROW_OP_0	49
+#define BCM281XX_PIN_KP_ROW_OP_1	50
+#define BCM281XX_PIN_KP_ROW_OP_2	51
+#define BCM281XX_PIN_KP_ROW_OP_3	52
+#define BCM281XX_PIN_LCD_B_0		53
+#define BCM281XX_PIN_LCD_B_1		54
+#define BCM281XX_PIN_LCD_B_2		55
+#define BCM281XX_PIN_LCD_B_3		56
+#define BCM281XX_PIN_LCD_B_4		57
+#define BCM281XX_PIN_LCD_B_5		58
+#define BCM281XX_PIN_LCD_B_6		59
+#define BCM281XX_PIN_LCD_B_7		60
+#define BCM281XX_PIN_LCD_G_0		61
+#define BCM281XX_PIN_LCD_G_1		62
+#define BCM281XX_PIN_LCD_G_2		63
+#define BCM281XX_PIN_LCD_G_3		64
+#define BCM281XX_PIN_LCD_G_4		65
+#define BCM281XX_PIN_LCD_G_5		66
+#define BCM281XX_PIN_LCD_G_6		67
+#define BCM281XX_PIN_LCD_G_7		68
+#define BCM281XX_PIN_LCD_HSYNC		69
+#define BCM281XX_PIN_LCD_OE		70
+#define BCM281XX_PIN_LCD_PCLK		71
+#define BCM281XX_PIN_LCD_R_0		72
+#define BCM281XX_PIN_LCD_R_1		73
+#define BCM281XX_PIN_LCD_R_2		74
+#define BCM281XX_PIN_LCD_R_3		75
+#define BCM281XX_PIN_LCD_R_4		76
+#define BCM281XX_PIN_LCD_R_5		77
+#define BCM281XX_PIN_LCD_R_6		78
+#define BCM281XX_PIN_LCD_R_7		79
+#define BCM281XX_PIN_LCD_VSYNC		80
+#define BCM281XX_PIN_MDMGPIO0		81
+#define BCM281XX_PIN_MDMGPIO1		82
+#define BCM281XX_PIN_MDMGPIO2		83
+#define BCM281XX_PIN_MDMGPIO3		84
+#define BCM281XX_PIN_MDMGPIO4		85
+#define BCM281XX_PIN_MDMGPIO5		86
+#define BCM281XX_PIN_MDMGPIO6		87
+#define BCM281XX_PIN_MDMGPIO7		88
+#define BCM281XX_PIN_MDMGPIO8		89
+#define BCM281XX_PIN_MPHI_DATA_0	90
+#define BCM281XX_PIN_MPHI_DATA_1	91
+#define BCM281XX_PIN_MPHI_DATA_2	92
+#define BCM281XX_PIN_MPHI_DATA_3	93
+#define BCM281XX_PIN_MPHI_DATA_4	94
+#define BCM281XX_PIN_MPHI_DATA_5	95
+#define BCM281XX_PIN_MPHI_DATA_6	96
+#define BCM281XX_PIN_MPHI_DATA_7	97
+#define BCM281XX_PIN_MPHI_DATA_8	98
+#define BCM281XX_PIN_MPHI_DATA_9	99
+#define BCM281XX_PIN_MPHI_DATA_10	100
+#define BCM281XX_PIN_MPHI_DATA_11	101
+#define BCM281XX_PIN_MPHI_DATA_12	102
+#define BCM281XX_PIN_MPHI_DATA_13	103
+#define BCM281XX_PIN_MPHI_DATA_14	104
+#define BCM281XX_PIN_MPHI_DATA_15	105
+#define BCM281XX_PIN_MPHI_HA0		106
+#define BCM281XX_PIN_MPHI_HAT0		107
+#define BCM281XX_PIN_MPHI_HAT1		108
+#define BCM281XX_PIN_MPHI_HCE0_N	109
+#define BCM281XX_PIN_MPHI_HCE1_N	110
+#define BCM281XX_PIN_MPHI_HRD_N		111
+#define BCM281XX_PIN_MPHI_HWR_N		112
+#define BCM281XX_PIN_MPHI_RUN0		113
+#define BCM281XX_PIN_MPHI_RUN1		114
+#define BCM281XX_PIN_MTX_SCAN_CLK	115
+#define BCM281XX_PIN_MTX_SCAN_DATA	116
+#define BCM281XX_PIN_NAND_AD_0		117
+#define BCM281XX_PIN_NAND_AD_1		118
+#define BCM281XX_PIN_NAND_AD_2		119
+#define BCM281XX_PIN_NAND_AD_3		120
+#define BCM281XX_PIN_NAND_AD_4		121
+#define BCM281XX_PIN_NAND_AD_5		122
+#define BCM281XX_PIN_NAND_AD_6		123
+#define BCM281XX_PIN_NAND_AD_7		124
+#define BCM281XX_PIN_NAND_ALE		125
+#define BCM281XX_PIN_NAND_CEN_0		126
+#define BCM281XX_PIN_NAND_CEN_1		127
+#define BCM281XX_PIN_NAND_CLE		128
+#define BCM281XX_PIN_NAND_OEN		129
+#define BCM281XX_PIN_NAND_RDY_0		130
+#define BCM281XX_PIN_NAND_RDY_1		131
+#define BCM281XX_PIN_NAND_WEN		132
+#define BCM281XX_PIN_NAND_WP		133
+#define BCM281XX_PIN_PC1		134
+#define BCM281XX_PIN_PC2		135
+#define BCM281XX_PIN_PMU_INT		136
+#define BCM281XX_PIN_PMU_SCL		137
+#define BCM281XX_PIN_PMU_SDA		138
+#define BCM281XX_PIN_RFST2G_MTSLOTEN3G	139
+#define BCM281XX_PIN_RGMII_0_RX_CTL	140
+#define BCM281XX_PIN_RGMII_0_RXC	141
+#define BCM281XX_PIN_RGMII_0_RXD_0	142
+#define BCM281XX_PIN_RGMII_0_RXD_1	143
+#define BCM281XX_PIN_RGMII_0_RXD_2	144
+#define BCM281XX_PIN_RGMII_0_RXD_3	145
+#define BCM281XX_PIN_RGMII_0_TX_CTL	146
+#define BCM281XX_PIN_RGMII_0_TXC	147
+#define BCM281XX_PIN_RGMII_0_TXD_0	148
+#define BCM281XX_PIN_RGMII_0_TXD_1	149
+#define BCM281XX_PIN_RGMII_0_TXD_2	150
+#define BCM281XX_PIN_RGMII_0_TXD_3	151
+#define BCM281XX_PIN_RGMII_1_RX_CTL	152
+#define BCM281XX_PIN_RGMII_1_RXC	153
+#define BCM281XX_PIN_RGMII_1_RXD_0	154
+#define BCM281XX_PIN_RGMII_1_RXD_1	155
+#define BCM281XX_PIN_RGMII_1_RXD_2	156
+#define BCM281XX_PIN_RGMII_1_RXD_3	157
+#define BCM281XX_PIN_RGMII_1_TX_CTL	158
+#define BCM281XX_PIN_RGMII_1_TXC	159
+#define BCM281XX_PIN_RGMII_1_TXD_0	160
+#define BCM281XX_PIN_RGMII_1_TXD_1	161
+#define BCM281XX_PIN_RGMII_1_TXD_2	162
+#define BCM281XX_PIN_RGMII_1_TXD_3	163
+#define BCM281XX_PIN_RGMII_GPIO_0	164
+#define BCM281XX_PIN_RGMII_GPIO_1	165
+#define BCM281XX_PIN_RGMII_GPIO_2	166
+#define BCM281XX_PIN_RGMII_GPIO_3	167
+#define BCM281XX_PIN_RTXDATA2G_TXDATA3G1	168
+#define BCM281XX_PIN_RTXEN2G_TXDATA3G2	169
+#define BCM281XX_PIN_RXDATA3G0		170
+#define BCM281XX_PIN_RXDATA3G1		171
+#define BCM281XX_PIN_RXDATA3G2		172
+#define BCM281XX_PIN_SDIO1_CLK		173
+#define BCM281XX_PIN_SDIO1_CMD		174
+#define BCM281XX_PIN_SDIO1_DATA_0	175
+#define BCM281XX_PIN_SDIO1_DATA_1	176
+#define BCM281XX_PIN_SDIO1_DATA_2	177
+#define BCM281XX_PIN_SDIO1_DATA_3	178
+#define BCM281XX_PIN_SDIO4_CLK		179
+#define BCM281XX_PIN_SDIO4_CMD		180
+#define BCM281XX_PIN_SDIO4_DATA_0	181
+#define BCM281XX_PIN_SDIO4_DATA_1	182
+#define BCM281XX_PIN_SDIO4_DATA_2	183
+#define BCM281XX_PIN_SDIO4_DATA_3	184
+#define BCM281XX_PIN_SIM_CLK		185
+#define BCM281XX_PIN_SIM_DATA		186
+#define BCM281XX_PIN_SIM_DET		187
+#define BCM281XX_PIN_SIM_RESETN		188
+#define BCM281XX_PIN_SIM2_CLK		189
+#define BCM281XX_PIN_SIM2_DATA		190
+#define BCM281XX_PIN_SIM2_DET		191
+#define BCM281XX_PIN_SIM2_RESETN	192
+#define BCM281XX_PIN_SRI_C		193
+#define BCM281XX_PIN_SRI_D		194
+#define BCM281XX_PIN_SRI_E		195
+#define BCM281XX_PIN_SSP_EXTCLK		196
+#define BCM281XX_PIN_SSP0_CLK		197
+#define BCM281XX_PIN_SSP0_FS		198
+#define BCM281XX_PIN_SSP0_RXD		199
+#define BCM281XX_PIN_SSP0_TXD		200
+#define BCM281XX_PIN_SSP2_CLK		201
+#define BCM281XX_PIN_SSP2_FS_0		202
+#define BCM281XX_PIN_SSP2_FS_1		203
+#define BCM281XX_PIN_SSP2_FS_2		204
+#define BCM281XX_PIN_SSP2_FS_3		205
+#define BCM281XX_PIN_SSP2_RXD_0		206
+#define BCM281XX_PIN_SSP2_RXD_1		207
+#define BCM281XX_PIN_SSP2_TXD_0		208
+#define BCM281XX_PIN_SSP2_TXD_1		209
+#define BCM281XX_PIN_SSP3_CLK		210
+#define BCM281XX_PIN_SSP3_FS		211
+#define BCM281XX_PIN_SSP3_RXD		212
+#define BCM281XX_PIN_SSP3_TXD		213
+#define BCM281XX_PIN_SSP4_CLK		214
+#define BCM281XX_PIN_SSP4_FS		215
+#define BCM281XX_PIN_SSP4_RXD		216
+#define BCM281XX_PIN_SSP4_TXD		217
+#define BCM281XX_PIN_SSP5_CLK		218
+#define BCM281XX_PIN_SSP5_FS		219
+#define BCM281XX_PIN_SSP5_RXD		220
+#define BCM281XX_PIN_SSP5_TXD		221
+#define BCM281XX_PIN_SSP6_CLK		222
+#define BCM281XX_PIN_SSP6_FS		223
+#define BCM281XX_PIN_SSP6_RXD		224
+#define BCM281XX_PIN_SSP6_TXD		225
+#define BCM281XX_PIN_STAT_1		226
+#define BCM281XX_PIN_STAT_2		227
+#define BCM281XX_PIN_SYSCLKEN		228
+#define BCM281XX_PIN_TRACECLK		229
+#define BCM281XX_PIN_TRACEDT00		230
+#define BCM281XX_PIN_TRACEDT01		231
+#define BCM281XX_PIN_TRACEDT02		232
+#define BCM281XX_PIN_TRACEDT03		233
+#define BCM281XX_PIN_TRACEDT04		234
+#define BCM281XX_PIN_TRACEDT05		235
+#define BCM281XX_PIN_TRACEDT06		236
+#define BCM281XX_PIN_TRACEDT07		237
+#define BCM281XX_PIN_TRACEDT08		238
+#define BCM281XX_PIN_TRACEDT09		239
+#define BCM281XX_PIN_TRACEDT10		240
+#define BCM281XX_PIN_TRACEDT11		241
+#define BCM281XX_PIN_TRACEDT12		242
+#define BCM281XX_PIN_TRACEDT13		243
+#define BCM281XX_PIN_TRACEDT14		244
+#define BCM281XX_PIN_TRACEDT15		245
+#define BCM281XX_PIN_TXDATA3G0		246
+#define BCM281XX_PIN_TXPWRIND		247
+#define BCM281XX_PIN_UARTB1_UCTS	248
+#define BCM281XX_PIN_UARTB1_URTS	249
+#define BCM281XX_PIN_UARTB1_URXD	250
+#define BCM281XX_PIN_UARTB1_UTXD	251
+#define BCM281XX_PIN_UARTB2_URXD	252
+#define BCM281XX_PIN_UARTB2_UTXD	253
+#define BCM281XX_PIN_UARTB3_UCTS	254
+#define BCM281XX_PIN_UARTB3_URTS	255
+#define BCM281XX_PIN_UARTB3_URXD	256
+#define BCM281XX_PIN_UARTB3_UTXD	257
+#define BCM281XX_PIN_UARTB4_UCTS	258
+#define BCM281XX_PIN_UARTB4_URTS	259
+#define BCM281XX_PIN_UARTB4_URXD	260
+#define BCM281XX_PIN_UARTB4_UTXD	261
+#define BCM281XX_PIN_VC_CAM1_SCL	262
+#define BCM281XX_PIN_VC_CAM1_SDA	263
+#define BCM281XX_PIN_VC_CAM2_SCL	264
+#define BCM281XX_PIN_VC_CAM2_SDA	265
+#define BCM281XX_PIN_VC_CAM3_SCL	266
+#define BCM281XX_PIN_VC_CAM3_SDA	267
+
+#define BCM281XX_PIN_DESC(a, b, c) \
+	{ .number = a, .name = b, .drv_data = &c##_pin }
+
+/*
+ * Pin description definition.  The order here must be the same as defined in
+ * the PADCTRLREG block in the RDB, since the pin number is used as an index
+ * into this array.
+ */
+static const struct pinctrl_pin_desc bcm281xx_pinctrl_pins[] = {
+	BCM281XX_PIN_DESC(BCM281XX_PIN_ADCSYNC, "adcsync", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BAT_RM, "bat_rm", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC1_SCL, "bsc1_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC1_SDA, "bsc1_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC2_SCL, "bsc2_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC2_SDA, "bsc2_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLASSGPWR, "classgpwr", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLK_CX8, "clk_cx8", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_0, "clkout_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_1, "clkout_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_2, "clkout_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_3, "clkout_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKREQ_IN_0, "clkreq_in_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKREQ_IN_1, "clkreq_in_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ1, "cws_sys_req1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ2, "cws_sys_req2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ3, "cws_sys_req3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC1_CLK, "digmic1_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC1_DQ, "digmic1_dq", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC2_CLK, "digmic2_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC2_DQ, "digmic2_dq", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN13, "gpen13", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN14, "gpen14", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN15, "gpen15", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO00, "gpio00", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO01, "gpio01", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO02, "gpio02", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO03, "gpio03", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO04, "gpio04", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO05, "gpio05", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO06, "gpio06", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO07, "gpio07", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO08, "gpio08", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO09, "gpio09", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO10, "gpio10", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO11, "gpio11", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO12, "gpio12", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO13, "gpio13", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO14, "gpio14", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPS_PABLANK, "gps_pablank", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_GPS_TMARK, "gps_tmark", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_HDMI_SCL, "hdmi_scl", hdmi),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_HDMI_SDA, "hdmi_sda", hdmi),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_IC_DM, "ic_dm", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_IC_DP, "ic_dp", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_0, "kp_col_ip_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_1, "kp_col_ip_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_2, "kp_col_ip_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_3, "kp_col_ip_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_0, "kp_row_op_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_1, "kp_row_op_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_2, "kp_row_op_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_3, "kp_row_op_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_0, "lcd_b_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_1, "lcd_b_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_2, "lcd_b_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_3, "lcd_b_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_4, "lcd_b_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_5, "lcd_b_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_6, "lcd_b_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_7, "lcd_b_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_0, "lcd_g_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_1, "lcd_g_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_2, "lcd_g_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_3, "lcd_g_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_4, "lcd_g_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_5, "lcd_g_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_6, "lcd_g_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_7, "lcd_g_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_HSYNC, "lcd_hsync", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_OE, "lcd_oe", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_PCLK, "lcd_pclk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_0, "lcd_r_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_1, "lcd_r_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_2, "lcd_r_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_3, "lcd_r_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_4, "lcd_r_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_5, "lcd_r_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_6, "lcd_r_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_7, "lcd_r_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_VSYNC, "lcd_vsync", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO0, "mdmgpio0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO1, "mdmgpio1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO2, "mdmgpio2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO3, "mdmgpio3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO4, "mdmgpio4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO5, "mdmgpio5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO6, "mdmgpio6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO7, "mdmgpio7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO8, "mdmgpio8", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_0, "mphi_data_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_1, "mphi_data_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_2, "mphi_data_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_3, "mphi_data_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_4, "mphi_data_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_5, "mphi_data_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_6, "mphi_data_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_7, "mphi_data_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_8, "mphi_data_8", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_9, "mphi_data_9", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_10, "mphi_data_10", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_11, "mphi_data_11", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_12, "mphi_data_12", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_13, "mphi_data_13", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_14, "mphi_data_14", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_15, "mphi_data_15", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HA0, "mphi_ha0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HAT0, "mphi_hat0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HAT1, "mphi_hat1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HCE0_N, "mphi_hce0_n", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HCE1_N, "mphi_hce1_n", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HRD_N, "mphi_hrd_n", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HWR_N, "mphi_hwr_n", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_RUN0, "mphi_run0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_RUN1, "mphi_run1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MTX_SCAN_CLK, "mtx_scan_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_MTX_SCAN_DATA, "mtx_scan_data", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_0, "nand_ad_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_1, "nand_ad_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_2, "nand_ad_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_3, "nand_ad_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_4, "nand_ad_4", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_5, "nand_ad_5", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_6, "nand_ad_6", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_7, "nand_ad_7", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_ALE, "nand_ale", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CEN_0, "nand_cen_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CEN_1, "nand_cen_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CLE, "nand_cle", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_OEN, "nand_oen", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_RDY_0, "nand_rdy_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_RDY_1, "nand_rdy_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_WEN, "nand_wen", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_WP, "nand_wp", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PC1, "pc1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PC2, "pc2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_INT, "pmu_int", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_SCL, "pmu_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_SDA, "pmu_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RFST2G_MTSLOTEN3G, "rfst2g_mtsloten3g",
+		std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RX_CTL, "rgmii_0_rx_ctl", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXC, "rgmii_0_rxc", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_0, "rgmii_0_rxd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_1, "rgmii_0_rxd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_2, "rgmii_0_rxd_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_3, "rgmii_0_rxd_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TX_CTL, "rgmii_0_tx_ctl", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXC, "rgmii_0_txc", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_0, "rgmii_0_txd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_1, "rgmii_0_txd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_2, "rgmii_0_txd_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_3, "rgmii_0_txd_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RX_CTL, "rgmii_1_rx_ctl", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXC, "rgmii_1_rxc", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_0, "rgmii_1_rxd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_1, "rgmii_1_rxd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_2, "rgmii_1_rxd_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_3, "rgmii_1_rxd_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TX_CTL, "rgmii_1_tx_ctl", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXC, "rgmii_1_txc", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_0, "rgmii_1_txd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_1, "rgmii_1_txd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_2, "rgmii_1_txd_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_3, "rgmii_1_txd_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_0, "rgmii_gpio_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_1, "rgmii_gpio_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_2, "rgmii_gpio_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_3, "rgmii_gpio_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RTXDATA2G_TXDATA3G1,
+		"rtxdata2g_txdata3g1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RTXEN2G_TXDATA3G2, "rtxen2g_txdata3g2",
+		std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G0, "rxdata3g0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G1, "rxdata3g1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G2, "rxdata3g2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_CLK, "sdio1_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_CMD, "sdio1_cmd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_0, "sdio1_data_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_1, "sdio1_data_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_2, "sdio1_data_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_3, "sdio1_data_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_CLK, "sdio4_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_CMD, "sdio4_cmd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_0, "sdio4_data_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_1, "sdio4_data_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_2, "sdio4_data_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_3, "sdio4_data_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_CLK, "sim_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_DATA, "sim_data", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_DET, "sim_det", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_RESETN, "sim_resetn", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_CLK, "sim2_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_DATA, "sim2_data", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_DET, "sim2_det", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_RESETN, "sim2_resetn", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_C, "sri_c", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_D, "sri_d", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_E, "sri_e", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP_EXTCLK, "ssp_extclk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_CLK, "ssp0_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_FS, "ssp0_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_RXD, "ssp0_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_TXD, "ssp0_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_CLK, "ssp2_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_0, "ssp2_fs_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_1, "ssp2_fs_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_2, "ssp2_fs_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_3, "ssp2_fs_3", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_RXD_0, "ssp2_rxd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_RXD_1, "ssp2_rxd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_TXD_0, "ssp2_txd_0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_TXD_1, "ssp2_txd_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_CLK, "ssp3_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_FS, "ssp3_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_RXD, "ssp3_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_TXD, "ssp3_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_CLK, "ssp4_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_FS, "ssp4_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_RXD, "ssp4_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_TXD, "ssp4_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_CLK, "ssp5_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_FS, "ssp5_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_RXD, "ssp5_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_TXD, "ssp5_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_CLK, "ssp6_clk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_FS, "ssp6_fs", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_RXD, "ssp6_rxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_TXD, "ssp6_txd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_STAT_1, "stat_1", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_STAT_2, "stat_2", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_SYSCLKEN, "sysclken", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACECLK, "traceclk", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT00, "tracedt00", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT01, "tracedt01", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT02, "tracedt02", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT03, "tracedt03", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT04, "tracedt04", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT05, "tracedt05", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT06, "tracedt06", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT07, "tracedt07", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT08, "tracedt08", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT09, "tracedt09", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT10, "tracedt10", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT11, "tracedt11", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT12, "tracedt12", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT13, "tracedt13", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT14, "tracedt14", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT15, "tracedt15", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TXDATA3G0, "txdata3g0", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_TXPWRIND, "txpwrind", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_UCTS, "uartb1_ucts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_URTS, "uartb1_urts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_URXD, "uartb1_urxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_UTXD, "uartb1_utxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB2_URXD, "uartb2_urxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB2_UTXD, "uartb2_utxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_UCTS, "uartb3_ucts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_URTS, "uartb3_urts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_URXD, "uartb3_urxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_UTXD, "uartb3_utxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_UCTS, "uartb4_ucts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_URTS, "uartb4_urts", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_URXD, "uartb4_urxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_UTXD, "uartb4_utxd", std),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM1_SCL, "vc_cam1_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM1_SDA, "vc_cam1_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM2_SCL, "vc_cam2_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM2_SDA, "vc_cam2_sda", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM3_SCL, "vc_cam3_scl", i2c),
+	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM3_SDA, "vc_cam3_sda", i2c),
+};
+
+static const char * const bcm281xx_alt_groups[] = {
+	"adcsync",
+	"bat_rm",
+	"bsc1_scl",
+	"bsc1_sda",
+	"bsc2_scl",
+	"bsc2_sda",
+	"classgpwr",
+	"clk_cx8",
+	"clkout_0",
+	"clkout_1",
+	"clkout_2",
+	"clkout_3",
+	"clkreq_in_0",
+	"clkreq_in_1",
+	"cws_sys_req1",
+	"cws_sys_req2",
+	"cws_sys_req3",
+	"digmic1_clk",
+	"digmic1_dq",
+	"digmic2_clk",
+	"digmic2_dq",
+	"gpen13",
+	"gpen14",
+	"gpen15",
+	"gpio00",
+	"gpio01",
+	"gpio02",
+	"gpio03",
+	"gpio04",
+	"gpio05",
+	"gpio06",
+	"gpio07",
+	"gpio08",
+	"gpio09",
+	"gpio10",
+	"gpio11",
+	"gpio12",
+	"gpio13",
+	"gpio14",
+	"gps_pablank",
+	"gps_tmark",
+	"hdmi_scl",
+	"hdmi_sda",
+	"ic_dm",
+	"ic_dp",
+	"kp_col_ip_0",
+	"kp_col_ip_1",
+	"kp_col_ip_2",
+	"kp_col_ip_3",
+	"kp_row_op_0",
+	"kp_row_op_1",
+	"kp_row_op_2",
+	"kp_row_op_3",
+	"lcd_b_0",
+	"lcd_b_1",
+	"lcd_b_2",
+	"lcd_b_3",
+	"lcd_b_4",
+	"lcd_b_5",
+	"lcd_b_6",
+	"lcd_b_7",
+	"lcd_g_0",
+	"lcd_g_1",
+	"lcd_g_2",
+	"lcd_g_3",
+	"lcd_g_4",
+	"lcd_g_5",
+	"lcd_g_6",
+	"lcd_g_7",
+	"lcd_hsync",
+	"lcd_oe",
+	"lcd_pclk",
+	"lcd_r_0",
+	"lcd_r_1",
+	"lcd_r_2",
+	"lcd_r_3",
+	"lcd_r_4",
+	"lcd_r_5",
+	"lcd_r_6",
+	"lcd_r_7",
+	"lcd_vsync",
+	"mdmgpio0",
+	"mdmgpio1",
+	"mdmgpio2",
+	"mdmgpio3",
+	"mdmgpio4",
+	"mdmgpio5",
+	"mdmgpio6",
+	"mdmgpio7",
+	"mdmgpio8",
+	"mphi_data_0",
+	"mphi_data_1",
+	"mphi_data_2",
+	"mphi_data_3",
+	"mphi_data_4",
+	"mphi_data_5",
+	"mphi_data_6",
+	"mphi_data_7",
+	"mphi_data_8",
+	"mphi_data_9",
+	"mphi_data_10",
+	"mphi_data_11",
+	"mphi_data_12",
+	"mphi_data_13",
+	"mphi_data_14",
+	"mphi_data_15",
+	"mphi_ha0",
+	"mphi_hat0",
+	"mphi_hat1",
+	"mphi_hce0_n",
+	"mphi_hce1_n",
+	"mphi_hrd_n",
+	"mphi_hwr_n",
+	"mphi_run0",
+	"mphi_run1",
+	"mtx_scan_clk",
+	"mtx_scan_data",
+	"nand_ad_0",
+	"nand_ad_1",
+	"nand_ad_2",
+	"nand_ad_3",
+	"nand_ad_4",
+	"nand_ad_5",
+	"nand_ad_6",
+	"nand_ad_7",
+	"nand_ale",
+	"nand_cen_0",
+	"nand_cen_1",
+	"nand_cle",
+	"nand_oen",
+	"nand_rdy_0",
+	"nand_rdy_1",
+	"nand_wen",
+	"nand_wp",
+	"pc1",
+	"pc2",
+	"pmu_int",
+	"pmu_scl",
+	"pmu_sda",
+	"rfst2g_mtsloten3g",
+	"rgmii_0_rx_ctl",
+	"rgmii_0_rxc",
+	"rgmii_0_rxd_0",
+	"rgmii_0_rxd_1",
+	"rgmii_0_rxd_2",
+	"rgmii_0_rxd_3",
+	"rgmii_0_tx_ctl",
+	"rgmii_0_txc",
+	"rgmii_0_txd_0",
+	"rgmii_0_txd_1",
+	"rgmii_0_txd_2",
+	"rgmii_0_txd_3",
+	"rgmii_1_rx_ctl",
+	"rgmii_1_rxc",
+	"rgmii_1_rxd_0",
+	"rgmii_1_rxd_1",
+	"rgmii_1_rxd_2",
+	"rgmii_1_rxd_3",
+	"rgmii_1_tx_ctl",
+	"rgmii_1_txc",
+	"rgmii_1_txd_0",
+	"rgmii_1_txd_1",
+	"rgmii_1_txd_2",
+	"rgmii_1_txd_3",
+	"rgmii_gpio_0",
+	"rgmii_gpio_1",
+	"rgmii_gpio_2",
+	"rgmii_gpio_3",
+	"rtxdata2g_txdata3g1",
+	"rtxen2g_txdata3g2",
+	"rxdata3g0",
+	"rxdata3g1",
+	"rxdata3g2",
+	"sdio1_clk",
+	"sdio1_cmd",
+	"sdio1_data_0",
+	"sdio1_data_1",
+	"sdio1_data_2",
+	"sdio1_data_3",
+	"sdio4_clk",
+	"sdio4_cmd",
+	"sdio4_data_0",
+	"sdio4_data_1",
+	"sdio4_data_2",
+	"sdio4_data_3",
+	"sim_clk",
+	"sim_data",
+	"sim_det",
+	"sim_resetn",
+	"sim2_clk",
+	"sim2_data",
+	"sim2_det",
+	"sim2_resetn",
+	"sri_c",
+	"sri_d",
+	"sri_e",
+	"ssp_extclk",
+	"ssp0_clk",
+	"ssp0_fs",
+	"ssp0_rxd",
+	"ssp0_txd",
+	"ssp2_clk",
+	"ssp2_fs_0",
+	"ssp2_fs_1",
+	"ssp2_fs_2",
+	"ssp2_fs_3",
+	"ssp2_rxd_0",
+	"ssp2_rxd_1",
+	"ssp2_txd_0",
+	"ssp2_txd_1",
+	"ssp3_clk",
+	"ssp3_fs",
+	"ssp3_rxd",
+	"ssp3_txd",
+	"ssp4_clk",
+	"ssp4_fs",
+	"ssp4_rxd",
+	"ssp4_txd",
+	"ssp5_clk",
+	"ssp5_fs",
+	"ssp5_rxd",
+	"ssp5_txd",
+	"ssp6_clk",
+	"ssp6_fs",
+	"ssp6_rxd",
+	"ssp6_txd",
+	"stat_1",
+	"stat_2",
+	"sysclken",
+	"traceclk",
+	"tracedt00",
+	"tracedt01",
+	"tracedt02",
+	"tracedt03",
+	"tracedt04",
+	"tracedt05",
+	"tracedt06",
+	"tracedt07",
+	"tracedt08",
+	"tracedt09",
+	"tracedt10",
+	"tracedt11",
+	"tracedt12",
+	"tracedt13",
+	"tracedt14",
+	"tracedt15",
+	"txdata3g0",
+	"txpwrind",
+	"uartb1_ucts",
+	"uartb1_urts",
+	"uartb1_urxd",
+	"uartb1_utxd",
+	"uartb2_urxd",
+	"uartb2_utxd",
+	"uartb3_ucts",
+	"uartb3_urts",
+	"uartb3_urxd",
+	"uartb3_utxd",
+	"uartb4_ucts",
+	"uartb4_urts",
+	"uartb4_urxd",
+	"uartb4_utxd",
+	"vc_cam1_scl",
+	"vc_cam1_sda",
+	"vc_cam2_scl",
+	"vc_cam2_sda",
+	"vc_cam3_scl",
+	"vc_cam3_sda",
+};
+
+/* Every pin can implement all ALT1-ALT4 functions */
+#define BCM281XX_PIN_FUNCTION(fcn_name)			\
+{							\
+	.name = #fcn_name,				\
+	.groups = bcm281xx_alt_groups,			\
+	.ngroups = ARRAY_SIZE(bcm281xx_alt_groups),	\
+}
+
+static const struct bcm281xx_pin_function bcm281xx_functions[] = {
+	BCM281XX_PIN_FUNCTION(alt1),
+	BCM281XX_PIN_FUNCTION(alt2),
+	BCM281XX_PIN_FUNCTION(alt3),
+	BCM281XX_PIN_FUNCTION(alt4),
+};
+
+static struct bcm281xx_pinctrl_data bcm281xx_pinctrl = {
+	.pins = bcm281xx_pinctrl_pins,
+	.npins = ARRAY_SIZE(bcm281xx_pinctrl_pins),
+	.functions = bcm281xx_functions,
+	.nfunctions = ARRAY_SIZE(bcm281xx_functions),
+};
+
+static inline enum bcm281xx_pin_type pin_type_get(struct pinctrl_dev *pctldev,
+						  unsigned pin)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	if (pin >= pdata->npins)
+		return BCM281XX_PIN_TYPE_UNKNOWN;
+
+	return *(enum bcm281xx_pin_type *)(pdata->pins[pin].drv_data);
+}
+
+#define BCM281XX_PIN_SHIFT(type, param) \
+	(BCM281XX_ ## type ## _PIN_REG_ ## param ## _SHIFT)
+
+#define BCM281XX_PIN_MASK(type, param) \
+	(BCM281XX_ ## type ## _PIN_REG_ ## param ## _MASK)
+
+/*
+ * This helper function is used to build up the value and mask used to write to
+ * a pin register, but does not actually write to the register.
+ */
+static inline void bcm281xx_pin_update(u32 *reg_val, u32 *reg_mask,
+				       u32 param_val, u32 param_shift,
+				       u32 param_mask)
+{
+	*reg_val &= ~param_mask;
+	*reg_val |= (param_val << param_shift) & param_mask;
+	*reg_mask |= param_mask;
+}
+
+static struct regmap_config bcm281xx_pinctrl_regmap_config = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = BCM281XX_PIN_VC_CAM3_SDA,
+};
+
+static int bcm281xx_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	return pdata->npins;
+}
+
+static const char *bcm281xx_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
+						   unsigned group)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	return pdata->pins[group].name;
+}
+
+static int bcm281xx_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+					   unsigned group,
+					   const unsigned **pins,
+					   unsigned *num_pins)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	*pins = &pdata->pins[group].number;
+	*num_pins = 1;
+
+	return 0;
+}
+
+static void bcm281xx_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
+					  struct seq_file *s,
+					  unsigned offset)
+{
+	seq_printf(s, " %s", dev_name(pctldev->dev));
+}
+
+static struct pinctrl_ops bcm281xx_pinctrl_ops = {
+	.get_groups_count = bcm281xx_pinctrl_get_groups_count,
+	.get_group_name = bcm281xx_pinctrl_get_group_name,
+	.get_group_pins = bcm281xx_pinctrl_get_group_pins,
+	.pin_dbg_show = bcm281xx_pinctrl_pin_dbg_show,
+	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int bcm281xx_pinctrl_get_fcns_count(struct pinctrl_dev *pctldev)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	return pdata->nfunctions;
+}
+
+static const char *bcm281xx_pinctrl_get_fcn_name(struct pinctrl_dev *pctldev,
+						 unsigned function)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	return pdata->functions[function].name;
+}
+
+static int bcm281xx_pinctrl_get_fcn_groups(struct pinctrl_dev *pctldev,
+					   unsigned function,
+					   const char * const **groups,
+					   unsigned * const num_groups)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+
+	*groups = pdata->functions[function].groups;
+	*num_groups = pdata->functions[function].ngroups;
+
+	return 0;
+}
+
+static int bcm281xx_pinmux_set(struct pinctrl_dev *pctldev,
+			       unsigned function,
+			       unsigned group)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	const struct bcm281xx_pin_function *f = &pdata->functions[function];
+	u32 offset = 4 * pdata->pins[group].number;
+	int rc = 0;
+
+	dev_dbg(pctldev->dev,
+		"%s(): Enable function %s (%d) of pin %s (%d) @offset 0x%x.\n",
+		__func__, f->name, function, pdata->pins[group].name,
+		pdata->pins[group].number, offset);
+
+	rc = regmap_update_bits(pdata->regmap, offset,
+		BCM281XX_PIN_REG_F_SEL_MASK,
+		function << BCM281XX_PIN_REG_F_SEL_SHIFT);
+	if (rc)
+		dev_err(pctldev->dev,
+			"Error updating register for pin %s (%d).\n",
+			pdata->pins[group].name, pdata->pins[group].number);
+
+	return rc;
+}
+
+static struct pinmux_ops bcm281xx_pinctrl_pinmux_ops = {
+	.get_functions_count = bcm281xx_pinctrl_get_fcns_count,
+	.get_function_name = bcm281xx_pinctrl_get_fcn_name,
+	.get_function_groups = bcm281xx_pinctrl_get_fcn_groups,
+	.set_mux = bcm281xx_pinmux_set,
+};
+
+static int bcm281xx_pinctrl_pin_config_get(struct pinctrl_dev *pctldev,
+					   unsigned pin,
+					   unsigned long *config)
+{
+	return -ENOTSUPP;
+}
+
+
+/* Goes through the configs and update register val/mask */
+static int bcm281xx_std_pin_update(struct pinctrl_dev *pctldev,
+				   unsigned pin,
+				   unsigned long *configs,
+				   unsigned num_configs,
+				   u32 *val,
+				   u32 *mask)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	int i;
+	enum pin_config_param param;
+	u16 arg;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+			arg = (arg >= 1 ? 1 : 0);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(STD, HYST),
+				BCM281XX_PIN_MASK(STD, HYST));
+			break;
+		/*
+		 * The pin bias can only be one of pull-up, pull-down, or
+		 * disable.  The user does not need to specify a value for the
+		 * property, and the default value from pinconf-generic is
+		 * ignored.
+		 */
+		case PIN_CONFIG_BIAS_DISABLE:
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(STD, PULL_UP),
+				BCM281XX_PIN_MASK(STD, PULL_UP));
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(STD, PULL_DN),
+				BCM281XX_PIN_MASK(STD, PULL_DN));
+			break;
+
+		case PIN_CONFIG_BIAS_PULL_UP:
+			bcm281xx_pin_update(val, mask, 1,
+				BCM281XX_PIN_SHIFT(STD, PULL_UP),
+				BCM281XX_PIN_MASK(STD, PULL_UP));
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(STD, PULL_DN),
+				BCM281XX_PIN_MASK(STD, PULL_DN));
+			break;
+
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(STD, PULL_UP),
+				BCM281XX_PIN_MASK(STD, PULL_UP));
+			bcm281xx_pin_update(val, mask, 1,
+				BCM281XX_PIN_SHIFT(STD, PULL_DN),
+				BCM281XX_PIN_MASK(STD, PULL_DN));
+			break;
+
+		case PIN_CONFIG_SLEW_RATE:
+			arg = (arg >= 1 ? 1 : 0);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(STD, SLEW),
+				BCM281XX_PIN_MASK(STD, SLEW));
+			break;
+
+		case PIN_CONFIG_INPUT_ENABLE:
+			/* inversed since register is for input _disable_ */
+			arg = (arg >= 1 ? 0 : 1);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(STD, INPUT_DIS),
+				BCM281XX_PIN_MASK(STD, INPUT_DIS));
+			break;
+
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			/* Valid range is 2-16 mA, even numbers only */
+			if ((arg < 2) || (arg > 16) || (arg % 2)) {
+				dev_err(pctldev->dev,
+					"Invalid Drive Strength value (%d) for "
+					"pin %s (%d). Valid values are "
+					"(2..16) mA, even numbers only.\n",
+					arg, pdata->pins[pin].name, pin);
+				return -EINVAL;
+			}
+			bcm281xx_pin_update(val, mask, (arg/2)-1,
+				BCM281XX_PIN_SHIFT(STD, DRV_STR),
+				BCM281XX_PIN_MASK(STD, DRV_STR));
+			break;
+
+		default:
+			dev_err(pctldev->dev,
+				"Unrecognized pin config %d for pin %s (%d).\n",
+				param, pdata->pins[pin].name, pin);
+			return -EINVAL;
+
+		} /* switch config */
+	} /* for each config */
+
+	return 0;
+}
+
+/*
+ * The pull-up strength for an I2C pin is represented by bits 4-6 in the
+ * register with the following mapping:
+ *   0b000: No pull-up
+ *   0b001: 1200 Ohm
+ *   0b010: 1800 Ohm
+ *   0b011: 720 Ohm
+ *   0b100: 2700 Ohm
+ *   0b101: 831 Ohm
+ *   0b110: 1080 Ohm
+ *   0b111: 568 Ohm
+ * This array maps pull-up strength in Ohms to register values (1+index).
+ */
+static const u16 bcm281xx_pullup_map[] = {
+	1200, 1800, 720, 2700, 831, 1080, 568
+};
+
+/* Goes through the configs and update register val/mask */
+static int bcm281xx_i2c_pin_update(struct pinctrl_dev *pctldev,
+				   unsigned pin,
+				   unsigned long *configs,
+				   unsigned num_configs,
+				   u32 *val,
+				   u32 *mask)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	int i, j;
+	enum pin_config_param param;
+	u16 arg;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_BIAS_PULL_UP:
+			for (j = 0; j < ARRAY_SIZE(bcm281xx_pullup_map); j++)
+				if (bcm281xx_pullup_map[j] == arg)
+					break;
+
+			if (j == ARRAY_SIZE(bcm281xx_pullup_map)) {
+				dev_err(pctldev->dev,
+					"Invalid pull-up value (%d) for pin %s "
+					"(%d). Valid values are 568, 720, 831, "
+					"1080, 1200, 1800, 2700 Ohms.\n",
+					arg, pdata->pins[pin].name, pin);
+				return -EINVAL;
+			}
+
+			bcm281xx_pin_update(val, mask, j+1,
+				BCM281XX_PIN_SHIFT(I2C, PULL_UP_STR),
+				BCM281XX_PIN_MASK(I2C, PULL_UP_STR));
+			break;
+
+		case PIN_CONFIG_BIAS_DISABLE:
+			bcm281xx_pin_update(val, mask, 0,
+				BCM281XX_PIN_SHIFT(I2C, PULL_UP_STR),
+				BCM281XX_PIN_MASK(I2C, PULL_UP_STR));
+			break;
+
+		case PIN_CONFIG_SLEW_RATE:
+			arg = (arg >= 1 ? 1 : 0);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(I2C, SLEW),
+				BCM281XX_PIN_MASK(I2C, SLEW));
+			break;
+
+		case PIN_CONFIG_INPUT_ENABLE:
+			/* inversed since register is for input _disable_ */
+			arg = (arg >= 1 ? 0 : 1);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(I2C, INPUT_DIS),
+				BCM281XX_PIN_MASK(I2C, INPUT_DIS));
+			break;
+
+		default:
+			dev_err(pctldev->dev,
+				"Unrecognized pin config %d for pin %s (%d).\n",
+				param, pdata->pins[pin].name, pin);
+			return -EINVAL;
+
+		} /* switch config */
+	} /* for each config */
+
+	return 0;
+}
+
+/* Goes through the configs and update register val/mask */
+static int bcm281xx_hdmi_pin_update(struct pinctrl_dev *pctldev,
+				    unsigned pin,
+				    unsigned long *configs,
+				    unsigned num_configs,
+				    u32 *val,
+				    u32 *mask)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	int i;
+	enum pin_config_param param;
+	u16 arg;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_SLEW_RATE:
+			arg = (arg >= 1 ? 1 : 0);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(HDMI, MODE),
+				BCM281XX_PIN_MASK(HDMI, MODE));
+			break;
+
+		case PIN_CONFIG_INPUT_ENABLE:
+			/* inversed since register is for input _disable_ */
+			arg = (arg >= 1 ? 0 : 1);
+			bcm281xx_pin_update(val, mask, arg,
+				BCM281XX_PIN_SHIFT(HDMI, INPUT_DIS),
+				BCM281XX_PIN_MASK(HDMI, INPUT_DIS));
+			break;
+
+		default:
+			dev_err(pctldev->dev,
+				"Unrecognized pin config %d for pin %s (%d).\n",
+				param, pdata->pins[pin].name, pin);
+			return -EINVAL;
+
+		} /* switch config */
+	} /* for each config */
+
+	return 0;
+}
+
+static int bcm281xx_pinctrl_pin_config_set(struct pinctrl_dev *pctldev,
+					   unsigned pin,
+					   unsigned long *configs,
+					   unsigned num_configs)
+{
+	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
+	enum bcm281xx_pin_type pin_type;
+	u32 offset = 4 * pin;
+	u32 cfg_val, cfg_mask;
+	int rc;
+
+	cfg_val = 0;
+	cfg_mask = 0;
+	pin_type = pin_type_get(pctldev, pin);
+
+	/* Different pins have different configuration options */
+	switch (pin_type) {
+	case BCM281XX_PIN_TYPE_STD:
+		rc = bcm281xx_std_pin_update(pctldev, pin, configs,
+			num_configs, &cfg_val, &cfg_mask);
+		break;
+
+	case BCM281XX_PIN_TYPE_I2C:
+		rc = bcm281xx_i2c_pin_update(pctldev, pin, configs,
+			num_configs, &cfg_val, &cfg_mask);
+		break;
+
+	case BCM281XX_PIN_TYPE_HDMI:
+		rc = bcm281xx_hdmi_pin_update(pctldev, pin, configs,
+			num_configs, &cfg_val, &cfg_mask);
+		break;
+
+	default:
+		dev_err(pctldev->dev, "Unknown pin type for pin %s (%d).\n",
+			pdata->pins[pin].name, pin);
+		return -EINVAL;
+
+	} /* switch pin type */
+
+	if (rc)
+		return rc;
+
+	dev_dbg(pctldev->dev,
+		"%s(): Set pin %s (%d) with config 0x%x, mask 0x%x\n",
+		__func__, pdata->pins[pin].name, pin, cfg_val, cfg_mask);
+
+	rc = regmap_update_bits(pdata->regmap, offset, cfg_mask, cfg_val);
+	if (rc) {
+		dev_err(pctldev->dev,
+			"Error updating register for pin %s (%d).\n",
+			pdata->pins[pin].name, pin);
+		return rc;
+	}
+
+	return 0;
+}
+
+static struct pinconf_ops bcm281xx_pinctrl_pinconf_ops = {
+	.pin_config_get = bcm281xx_pinctrl_pin_config_get,
+	.pin_config_set = bcm281xx_pinctrl_pin_config_set,
+};
+
+static struct pinctrl_desc bcm281xx_pinctrl_desc = {
+	/* name, pins, npins members initialized in probe function */
+	.pctlops = &bcm281xx_pinctrl_ops,
+	.pmxops = &bcm281xx_pinctrl_pinmux_ops,
+	.confops = &bcm281xx_pinctrl_pinconf_ops,
+	.owner = THIS_MODULE,
+};
+
+static int __init bcm281xx_pinctrl_probe(struct platform_device *pdev)
+{
+	struct bcm281xx_pinctrl_data *pdata = &bcm281xx_pinctrl;
+	struct resource *res;
+	struct pinctrl_dev *pctl;
+
+	/* So far We can assume there is only 1 bank of registers */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	pdata->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pdata->reg_base)) {
+		dev_err(&pdev->dev, "Failed to ioremap MEM resource\n");
+		return -ENODEV;
+	}
+
+	/* Initialize the dynamic part of pinctrl_desc */
+	pdata->regmap = devm_regmap_init_mmio(&pdev->dev, pdata->reg_base,
+		&bcm281xx_pinctrl_regmap_config);
+	if (IS_ERR(pdata->regmap)) {
+		dev_err(&pdev->dev, "Regmap MMIO init failed.\n");
+		return -ENODEV;
+	}
+
+	bcm281xx_pinctrl_desc.name = dev_name(&pdev->dev);
+	bcm281xx_pinctrl_desc.pins = bcm281xx_pinctrl.pins;
+	bcm281xx_pinctrl_desc.npins = bcm281xx_pinctrl.npins;
+
+	pctl = pinctrl_register(&bcm281xx_pinctrl_desc,
+				&pdev->dev,
+				pdata);
+	if (!pctl) {
+		dev_err(&pdev->dev, "Failed to register pinctrl\n");
+		return -ENODEV;
+	}
+
+	platform_set_drvdata(pdev, pdata);
+
+	return 0;
+}
+
+static struct of_device_id bcm281xx_pinctrl_of_match[] = {
+	{ .compatible = "brcm,bcm11351-pinctrl", },
+	{ },
+};
+
+static struct platform_driver bcm281xx_pinctrl_driver = {
+	.driver = {
+		.name = "bcm281xx-pinctrl",
+		.of_match_table = bcm281xx_pinctrl_of_match,
+	},
+};
+
+module_platform_driver_probe(bcm281xx_pinctrl_driver, bcm281xx_pinctrl_probe);
+
+MODULE_AUTHOR("Broadcom Corporation <bcm-kernel-feedback-list@broadcom.com>");
+MODULE_AUTHOR("Sherman Yin <syin@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom BCM281xx pinctrl driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
new file mode 100644
index 0000000..9aa8a3f
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -0,0 +1,1072 @@
+/*
+ * Driver for Broadcom BCM2835 GPIO unit (pinctrl + GPIO)
+ *
+ * Copyright (C) 2012 Chris Boot, Simon Arlott, Stephen Warren
+ *
+ * This driver is inspired by:
+ * pinctrl-nomadik.c, please see original file for copyright information
+ * pinctrl-tegra.c, please see original file for copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/bitmap.h>
+#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdesc.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#define MODULE_NAME "pinctrl-bcm2835"
+#define BCM2835_NUM_GPIOS 54
+#define BCM2835_NUM_BANKS 2
+
+#define BCM2835_PIN_BITMAP_SZ \
+	DIV_ROUND_UP(BCM2835_NUM_GPIOS, sizeof(unsigned long) * 8)
+
+/* GPIO register offsets */
+#define GPFSEL0		0x0	/* Function Select */
+#define GPSET0		0x1c	/* Pin Output Set */
+#define GPCLR0		0x28	/* Pin Output Clear */
+#define GPLEV0		0x34	/* Pin Level */
+#define GPEDS0		0x40	/* Pin Event Detect Status */
+#define GPREN0		0x4c	/* Pin Rising Edge Detect Enable */
+#define GPFEN0		0x58	/* Pin Falling Edge Detect Enable */
+#define GPHEN0		0x64	/* Pin High Detect Enable */
+#define GPLEN0		0x70	/* Pin Low Detect Enable */
+#define GPAREN0		0x7c	/* Pin Async Rising Edge Detect */
+#define GPAFEN0		0x88	/* Pin Async Falling Edge Detect */
+#define GPPUD		0x94	/* Pin Pull-up/down Enable */
+#define GPPUDCLK0	0x98	/* Pin Pull-up/down Enable Clock */
+
+#define FSEL_REG(p)		(GPFSEL0 + (((p) / 10) * 4))
+#define FSEL_SHIFT(p)		(((p) % 10) * 3)
+#define GPIO_REG_OFFSET(p)	((p) / 32)
+#define GPIO_REG_SHIFT(p)	((p) % 32)
+
+enum bcm2835_pinconf_param {
+	/* argument: bcm2835_pinconf_pull */
+	BCM2835_PINCONF_PARAM_PULL,
+};
+
+enum bcm2835_pinconf_pull {
+	BCM2835_PINCONFIG_PULL_NONE,
+	BCM2835_PINCONFIG_PULL_DOWN,
+	BCM2835_PINCONFIG_PULL_UP,
+};
+
+#define BCM2835_PINCONF_PACK(_param_, _arg_) ((_param_) << 16 | (_arg_))
+#define BCM2835_PINCONF_UNPACK_PARAM(_conf_) ((_conf_) >> 16)
+#define BCM2835_PINCONF_UNPACK_ARG(_conf_) ((_conf_) & 0xffff)
+
+struct bcm2835_gpio_irqdata {
+	struct bcm2835_pinctrl *pc;
+	int bank;
+};
+
+struct bcm2835_pinctrl {
+	struct device *dev;
+	void __iomem *base;
+	int irq[BCM2835_NUM_BANKS];
+
+	/* note: locking assumes each bank will have its own unsigned long */
+	unsigned long enabled_irq_map[BCM2835_NUM_BANKS];
+	unsigned int irq_type[BCM2835_NUM_GPIOS];
+
+	struct pinctrl_dev *pctl_dev;
+	struct irq_domain *irq_domain;
+	struct gpio_chip gpio_chip;
+	struct pinctrl_gpio_range gpio_range;
+
+	struct bcm2835_gpio_irqdata irq_data[BCM2835_NUM_BANKS];
+	spinlock_t irq_lock[BCM2835_NUM_BANKS];
+};
+
+static struct lock_class_key gpio_lock_class;
+
+/* pins are just named GPIO0..GPIO53 */
+#define BCM2835_GPIO_PIN(a) PINCTRL_PIN(a, "gpio" #a)
+static struct pinctrl_pin_desc bcm2835_gpio_pins[] = {
+	BCM2835_GPIO_PIN(0),
+	BCM2835_GPIO_PIN(1),
+	BCM2835_GPIO_PIN(2),
+	BCM2835_GPIO_PIN(3),
+	BCM2835_GPIO_PIN(4),
+	BCM2835_GPIO_PIN(5),
+	BCM2835_GPIO_PIN(6),
+	BCM2835_GPIO_PIN(7),
+	BCM2835_GPIO_PIN(8),
+	BCM2835_GPIO_PIN(9),
+	BCM2835_GPIO_PIN(10),
+	BCM2835_GPIO_PIN(11),
+	BCM2835_GPIO_PIN(12),
+	BCM2835_GPIO_PIN(13),
+	BCM2835_GPIO_PIN(14),
+	BCM2835_GPIO_PIN(15),
+	BCM2835_GPIO_PIN(16),
+	BCM2835_GPIO_PIN(17),
+	BCM2835_GPIO_PIN(18),
+	BCM2835_GPIO_PIN(19),
+	BCM2835_GPIO_PIN(20),
+	BCM2835_GPIO_PIN(21),
+	BCM2835_GPIO_PIN(22),
+	BCM2835_GPIO_PIN(23),
+	BCM2835_GPIO_PIN(24),
+	BCM2835_GPIO_PIN(25),
+	BCM2835_GPIO_PIN(26),
+	BCM2835_GPIO_PIN(27),
+	BCM2835_GPIO_PIN(28),
+	BCM2835_GPIO_PIN(29),
+	BCM2835_GPIO_PIN(30),
+	BCM2835_GPIO_PIN(31),
+	BCM2835_GPIO_PIN(32),
+	BCM2835_GPIO_PIN(33),
+	BCM2835_GPIO_PIN(34),
+	BCM2835_GPIO_PIN(35),
+	BCM2835_GPIO_PIN(36),
+	BCM2835_GPIO_PIN(37),
+	BCM2835_GPIO_PIN(38),
+	BCM2835_GPIO_PIN(39),
+	BCM2835_GPIO_PIN(40),
+	BCM2835_GPIO_PIN(41),
+	BCM2835_GPIO_PIN(42),
+	BCM2835_GPIO_PIN(43),
+	BCM2835_GPIO_PIN(44),
+	BCM2835_GPIO_PIN(45),
+	BCM2835_GPIO_PIN(46),
+	BCM2835_GPIO_PIN(47),
+	BCM2835_GPIO_PIN(48),
+	BCM2835_GPIO_PIN(49),
+	BCM2835_GPIO_PIN(50),
+	BCM2835_GPIO_PIN(51),
+	BCM2835_GPIO_PIN(52),
+	BCM2835_GPIO_PIN(53),
+};
+
+/* one pin per group */
+static const char * const bcm2835_gpio_groups[] = {
+	"gpio0",
+	"gpio1",
+	"gpio2",
+	"gpio3",
+	"gpio4",
+	"gpio5",
+	"gpio6",
+	"gpio7",
+	"gpio8",
+	"gpio9",
+	"gpio10",
+	"gpio11",
+	"gpio12",
+	"gpio13",
+	"gpio14",
+	"gpio15",
+	"gpio16",
+	"gpio17",
+	"gpio18",
+	"gpio19",
+	"gpio20",
+	"gpio21",
+	"gpio22",
+	"gpio23",
+	"gpio24",
+	"gpio25",
+	"gpio26",
+	"gpio27",
+	"gpio28",
+	"gpio29",
+	"gpio30",
+	"gpio31",
+	"gpio32",
+	"gpio33",
+	"gpio34",
+	"gpio35",
+	"gpio36",
+	"gpio37",
+	"gpio38",
+	"gpio39",
+	"gpio40",
+	"gpio41",
+	"gpio42",
+	"gpio43",
+	"gpio44",
+	"gpio45",
+	"gpio46",
+	"gpio47",
+	"gpio48",
+	"gpio49",
+	"gpio50",
+	"gpio51",
+	"gpio52",
+	"gpio53",
+};
+
+enum bcm2835_fsel {
+	BCM2835_FSEL_GPIO_IN = 0,
+	BCM2835_FSEL_GPIO_OUT = 1,
+	BCM2835_FSEL_ALT0 = 4,
+	BCM2835_FSEL_ALT1 = 5,
+	BCM2835_FSEL_ALT2 = 6,
+	BCM2835_FSEL_ALT3 = 7,
+	BCM2835_FSEL_ALT4 = 3,
+	BCM2835_FSEL_ALT5 = 2,
+	BCM2835_FSEL_COUNT = 8,
+	BCM2835_FSEL_MASK = 0x7,
+};
+
+static const char * const bcm2835_functions[BCM2835_FSEL_COUNT] = {
+	[BCM2835_FSEL_GPIO_IN] = "gpio_in",
+	[BCM2835_FSEL_GPIO_OUT] = "gpio_out",
+	[BCM2835_FSEL_ALT0] = "alt0",
+	[BCM2835_FSEL_ALT1] = "alt1",
+	[BCM2835_FSEL_ALT2] = "alt2",
+	[BCM2835_FSEL_ALT3] = "alt3",
+	[BCM2835_FSEL_ALT4] = "alt4",
+	[BCM2835_FSEL_ALT5] = "alt5",
+};
+
+static const char * const irq_type_names[] = {
+	[IRQ_TYPE_NONE] = "none",
+	[IRQ_TYPE_EDGE_RISING] = "edge-rising",
+	[IRQ_TYPE_EDGE_FALLING] = "edge-falling",
+	[IRQ_TYPE_EDGE_BOTH] = "edge-both",
+	[IRQ_TYPE_LEVEL_HIGH] = "level-high",
+	[IRQ_TYPE_LEVEL_LOW] = "level-low",
+};
+
+static inline u32 bcm2835_gpio_rd(struct bcm2835_pinctrl *pc, unsigned reg)
+{
+	return readl(pc->base + reg);
+}
+
+static inline void bcm2835_gpio_wr(struct bcm2835_pinctrl *pc, unsigned reg,
+		u32 val)
+{
+	writel(val, pc->base + reg);
+}
+
+static inline int bcm2835_gpio_get_bit(struct bcm2835_pinctrl *pc, unsigned reg,
+		unsigned bit)
+{
+	reg += GPIO_REG_OFFSET(bit) * 4;
+	return (bcm2835_gpio_rd(pc, reg) >> GPIO_REG_SHIFT(bit)) & 1;
+}
+
+/* note NOT a read/modify/write cycle */
+static inline void bcm2835_gpio_set_bit(struct bcm2835_pinctrl *pc,
+		unsigned reg, unsigned bit)
+{
+	reg += GPIO_REG_OFFSET(bit) * 4;
+	bcm2835_gpio_wr(pc, reg, BIT(GPIO_REG_SHIFT(bit)));
+}
+
+static inline enum bcm2835_fsel bcm2835_pinctrl_fsel_get(
+		struct bcm2835_pinctrl *pc, unsigned pin)
+{
+	u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
+	enum bcm2835_fsel status = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
+
+	dev_dbg(pc->dev, "get %08x (%u => %s)\n", val, pin,
+			bcm2835_functions[status]);
+
+	return status;
+}
+
+static inline void bcm2835_pinctrl_fsel_set(
+		struct bcm2835_pinctrl *pc, unsigned pin,
+		enum bcm2835_fsel fsel)
+{
+	u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
+	enum bcm2835_fsel cur = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
+
+	dev_dbg(pc->dev, "read %08x (%u => %s)\n", val, pin,
+			bcm2835_functions[cur]);
+
+	if (cur == fsel)
+		return;
+
+	if (cur != BCM2835_FSEL_GPIO_IN && fsel != BCM2835_FSEL_GPIO_IN) {
+		/* always transition through GPIO_IN */
+		val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
+		val |= BCM2835_FSEL_GPIO_IN << FSEL_SHIFT(pin);
+
+		dev_dbg(pc->dev, "trans %08x (%u <= %s)\n", val, pin,
+				bcm2835_functions[BCM2835_FSEL_GPIO_IN]);
+		bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
+	}
+
+	val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
+	val |= fsel << FSEL_SHIFT(pin);
+
+	dev_dbg(pc->dev, "write %08x (%u <= %s)\n", val, pin,
+			bcm2835_functions[fsel]);
+	bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
+}
+
+static int bcm2835_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+	return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void bcm2835_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+	pinctrl_free_gpio(chip->base + offset);
+}
+
+static int bcm2835_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+	return pinctrl_gpio_direction_input(chip->base + offset);
+}
+
+static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+
+	return bcm2835_gpio_get_bit(pc, GPLEV0, offset);
+}
+
+static int bcm2835_gpio_direction_output(struct gpio_chip *chip,
+		unsigned offset, int value)
+{
+	return pinctrl_gpio_direction_output(chip->base + offset);
+}
+
+static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+
+	bcm2835_gpio_set_bit(pc, value ? GPSET0 : GPCLR0, offset);
+}
+
+static int bcm2835_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
+
+	return irq_linear_revmap(pc->irq_domain, offset);
+}
+
+static struct gpio_chip bcm2835_gpio_chip = {
+	.label = MODULE_NAME,
+	.owner = THIS_MODULE,
+	.request = bcm2835_gpio_request,
+	.free = bcm2835_gpio_free,
+	.direction_input = bcm2835_gpio_direction_input,
+	.direction_output = bcm2835_gpio_direction_output,
+	.get = bcm2835_gpio_get,
+	.set = bcm2835_gpio_set,
+	.to_irq = bcm2835_gpio_to_irq,
+	.base = -1,
+	.ngpio = BCM2835_NUM_GPIOS,
+	.can_sleep = false,
+};
+
+static irqreturn_t bcm2835_gpio_irq_handler(int irq, void *dev_id)
+{
+	struct bcm2835_gpio_irqdata *irqdata = dev_id;
+	struct bcm2835_pinctrl *pc = irqdata->pc;
+	int bank = irqdata->bank;
+	unsigned long events;
+	unsigned offset;
+	unsigned gpio;
+	unsigned int type;
+
+	events = bcm2835_gpio_rd(pc, GPEDS0 + bank * 4);
+	events &= pc->enabled_irq_map[bank];
+	for_each_set_bit(offset, &events, 32) {
+		gpio = (32 * bank) + offset;
+		type = pc->irq_type[gpio];
+
+		/* ack edge triggered IRQs immediately */
+		if (!(type & IRQ_TYPE_LEVEL_MASK))
+			bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
+
+		generic_handle_irq(irq_linear_revmap(pc->irq_domain, gpio));
+
+		/* ack level triggered IRQ after handling them */
+		if (type & IRQ_TYPE_LEVEL_MASK)
+			bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
+	}
+	return events ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static inline void __bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
+	unsigned reg, unsigned offset, bool enable)
+{
+	u32 value;
+	reg += GPIO_REG_OFFSET(offset) * 4;
+	value = bcm2835_gpio_rd(pc, reg);
+	if (enable)
+		value |= BIT(GPIO_REG_SHIFT(offset));
+	else
+		value &= ~(BIT(GPIO_REG_SHIFT(offset)));
+	bcm2835_gpio_wr(pc, reg, value);
+}
+
+/* fast path for IRQ handler */
+static void bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
+	unsigned offset, bool enable)
+{
+	switch (pc->irq_type[offset]) {
+	case IRQ_TYPE_EDGE_RISING:
+		__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
+		__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		__bcm2835_gpio_irq_config(pc, GPHEN0, offset, enable);
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		__bcm2835_gpio_irq_config(pc, GPLEN0, offset, enable);
+		break;
+	}
+}
+
+static void bcm2835_gpio_irq_enable(struct irq_data *data)
+{
+	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
+	unsigned gpio = irqd_to_hwirq(data);
+	unsigned offset = GPIO_REG_SHIFT(gpio);
+	unsigned bank = GPIO_REG_OFFSET(gpio);
+	unsigned long flags;
+
+	spin_lock_irqsave(&pc->irq_lock[bank], flags);
+	set_bit(offset, &pc->enabled_irq_map[bank]);
+	bcm2835_gpio_irq_config(pc, gpio, true);
+	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
+}
+
+static void bcm2835_gpio_irq_disable(struct irq_data *data)
+{
+	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
+	unsigned gpio = irqd_to_hwirq(data);
+	unsigned offset = GPIO_REG_SHIFT(gpio);
+	unsigned bank = GPIO_REG_OFFSET(gpio);
+	unsigned long flags;
+
+	spin_lock_irqsave(&pc->irq_lock[bank], flags);
+	bcm2835_gpio_irq_config(pc, gpio, false);
+	clear_bit(offset, &pc->enabled_irq_map[bank]);
+	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
+}
+
+static int __bcm2835_gpio_irq_set_type_disabled(struct bcm2835_pinctrl *pc,
+	unsigned offset, unsigned int type)
+{
+	switch (type) {
+	case IRQ_TYPE_NONE:
+	case IRQ_TYPE_EDGE_RISING:
+	case IRQ_TYPE_EDGE_FALLING:
+	case IRQ_TYPE_EDGE_BOTH:
+	case IRQ_TYPE_LEVEL_HIGH:
+	case IRQ_TYPE_LEVEL_LOW:
+		pc->irq_type[offset] = type;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/* slower path for reconfiguring IRQ type */
+static int __bcm2835_gpio_irq_set_type_enabled(struct bcm2835_pinctrl *pc,
+	unsigned offset, unsigned int type)
+{
+	switch (type) {
+	case IRQ_TYPE_NONE:
+		if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+		}
+		break;
+
+	case IRQ_TYPE_EDGE_RISING:
+		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
+			/* RISING already enabled, disable FALLING */
+			pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+		} else if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+			bcm2835_gpio_irq_config(pc, offset, true);
+		}
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
+			/* FALLING already enabled, disable RISING */
+			pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+		} else if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+			bcm2835_gpio_irq_config(pc, offset, true);
+		}
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_RISING) {
+			/* RISING already enabled, enable FALLING too */
+			pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
+			bcm2835_gpio_irq_config(pc, offset, true);
+			pc->irq_type[offset] = type;
+		} else if (pc->irq_type[offset] == IRQ_TYPE_EDGE_FALLING) {
+			/* FALLING already enabled, enable RISING too */
+			pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
+			bcm2835_gpio_irq_config(pc, offset, true);
+			pc->irq_type[offset] = type;
+		} else if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+			bcm2835_gpio_irq_config(pc, offset, true);
+		}
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+	case IRQ_TYPE_LEVEL_LOW:
+		if (pc->irq_type[offset] != type) {
+			bcm2835_gpio_irq_config(pc, offset, false);
+			pc->irq_type[offset] = type;
+			bcm2835_gpio_irq_config(pc, offset, true);
+		}
+		break;
+
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int bcm2835_gpio_irq_set_type(struct irq_data *data, unsigned int type)
+{
+	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
+	unsigned gpio = irqd_to_hwirq(data);
+	unsigned offset = GPIO_REG_SHIFT(gpio);
+	unsigned bank = GPIO_REG_OFFSET(gpio);
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&pc->irq_lock[bank], flags);
+
+	if (test_bit(offset, &pc->enabled_irq_map[bank]))
+		ret = __bcm2835_gpio_irq_set_type_enabled(pc, gpio, type);
+	else
+		ret = __bcm2835_gpio_irq_set_type_disabled(pc, gpio, type);
+
+	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
+
+	return ret;
+}
+
+static struct irq_chip bcm2835_gpio_irq_chip = {
+	.name = MODULE_NAME,
+	.irq_enable = bcm2835_gpio_irq_enable,
+	.irq_disable = bcm2835_gpio_irq_disable,
+	.irq_set_type = bcm2835_gpio_irq_set_type,
+};
+
+static int bcm2835_pctl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	return ARRAY_SIZE(bcm2835_gpio_groups);
+}
+
+static const char *bcm2835_pctl_get_group_name(struct pinctrl_dev *pctldev,
+		unsigned selector)
+{
+	return bcm2835_gpio_groups[selector];
+}
+
+static int bcm2835_pctl_get_group_pins(struct pinctrl_dev *pctldev,
+		unsigned selector,
+		const unsigned **pins,
+		unsigned *num_pins)
+{
+	*pins = &bcm2835_gpio_pins[selector].number;
+	*num_pins = 1;
+
+	return 0;
+}
+
+static void bcm2835_pctl_pin_dbg_show(struct pinctrl_dev *pctldev,
+		struct seq_file *s,
+		unsigned offset)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+	enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);
+	const char *fname = bcm2835_functions[fsel];
+	int value = bcm2835_gpio_get_bit(pc, GPLEV0, offset);
+	int irq = irq_find_mapping(pc->irq_domain, offset);
+
+	seq_printf(s, "function %s in %s; irq %d (%s)",
+		fname, value ? "hi" : "lo",
+		irq, irq_type_names[pc->irq_type[offset]]);
+}
+
+static void bcm2835_pctl_dt_free_map(struct pinctrl_dev *pctldev,
+		struct pinctrl_map *maps, unsigned num_maps)
+{
+	int i;
+
+	for (i = 0; i < num_maps; i++)
+		if (maps[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
+			kfree(maps[i].data.configs.configs);
+
+	kfree(maps);
+}
+
+static int bcm2835_pctl_dt_node_to_map_func(struct bcm2835_pinctrl *pc,
+		struct device_node *np, u32 pin, u32 fnum,
+		struct pinctrl_map **maps)
+{
+	struct pinctrl_map *map = *maps;
+
+	if (fnum >= ARRAY_SIZE(bcm2835_functions)) {
+		dev_err(pc->dev, "%s: invalid brcm,function %d\n",
+			of_node_full_name(np), fnum);
+		return -EINVAL;
+	}
+
+	map->type = PIN_MAP_TYPE_MUX_GROUP;
+	map->data.mux.group = bcm2835_gpio_groups[pin];
+	map->data.mux.function = bcm2835_functions[fnum];
+	(*maps)++;
+
+	return 0;
+}
+
+static int bcm2835_pctl_dt_node_to_map_pull(struct bcm2835_pinctrl *pc,
+		struct device_node *np, u32 pin, u32 pull,
+		struct pinctrl_map **maps)
+{
+	struct pinctrl_map *map = *maps;
+	unsigned long *configs;
+
+	if (pull > 2) {
+		dev_err(pc->dev, "%s: invalid brcm,pull %d\n",
+			of_node_full_name(np), pull);
+		return -EINVAL;
+	}
+
+	configs = kzalloc(sizeof(*configs), GFP_KERNEL);
+	if (!configs)
+		return -ENOMEM;
+	configs[0] = BCM2835_PINCONF_PACK(BCM2835_PINCONF_PARAM_PULL, pull);
+
+	map->type = PIN_MAP_TYPE_CONFIGS_PIN;
+	map->data.configs.group_or_pin = bcm2835_gpio_pins[pin].name;
+	map->data.configs.configs = configs;
+	map->data.configs.num_configs = 1;
+	(*maps)++;
+
+	return 0;
+}
+
+static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
+		struct device_node *np,
+		struct pinctrl_map **map, unsigned *num_maps)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+	struct property *pins, *funcs, *pulls;
+	int num_pins, num_funcs, num_pulls, maps_per_pin;
+	struct pinctrl_map *maps, *cur_map;
+	int i, err;
+	u32 pin, func, pull;
+
+	pins = of_find_property(np, "brcm,pins", NULL);
+	if (!pins) {
+		dev_err(pc->dev, "%s: missing brcm,pins property\n",
+				of_node_full_name(np));
+		return -EINVAL;
+	}
+
+	funcs = of_find_property(np, "brcm,function", NULL);
+	pulls = of_find_property(np, "brcm,pull", NULL);
+
+	if (!funcs && !pulls) {
+		dev_err(pc->dev,
+			"%s: neither brcm,function nor brcm,pull specified\n",
+			of_node_full_name(np));
+		return -EINVAL;
+	}
+
+	num_pins = pins->length / 4;
+	num_funcs = funcs ? (funcs->length / 4) : 0;
+	num_pulls = pulls ? (pulls->length / 4) : 0;
+
+	if (num_funcs > 1 && num_funcs != num_pins) {
+		dev_err(pc->dev,
+			"%s: brcm,function must have 1 or %d entries\n",
+			of_node_full_name(np), num_pins);
+		return -EINVAL;
+	}
+
+	if (num_pulls > 1 && num_pulls != num_pins) {
+		dev_err(pc->dev,
+			"%s: brcm,pull must have 1 or %d entries\n",
+			of_node_full_name(np), num_pins);
+		return -EINVAL;
+	}
+
+	maps_per_pin = 0;
+	if (num_funcs)
+		maps_per_pin++;
+	if (num_pulls)
+		maps_per_pin++;
+	cur_map = maps = kzalloc(num_pins * maps_per_pin * sizeof(*maps),
+				GFP_KERNEL);
+	if (!maps)
+		return -ENOMEM;
+
+	for (i = 0; i < num_pins; i++) {
+		err = of_property_read_u32_index(np, "brcm,pins", i, &pin);
+		if (err)
+			goto out;
+		if (pin >= ARRAY_SIZE(bcm2835_gpio_pins)) {
+			dev_err(pc->dev, "%s: invalid brcm,pins value %d\n",
+				of_node_full_name(np), pin);
+			err = -EINVAL;
+			goto out;
+		}
+
+		if (num_funcs) {
+			err = of_property_read_u32_index(np, "brcm,function",
+					(num_funcs > 1) ? i : 0, &func);
+			if (err)
+				goto out;
+			err = bcm2835_pctl_dt_node_to_map_func(pc, np, pin,
+							func, &cur_map);
+			if (err)
+				goto out;
+		}
+		if (num_pulls) {
+			err = of_property_read_u32_index(np, "brcm,pull",
+					(num_funcs > 1) ? i : 0, &pull);
+			if (err)
+				goto out;
+			err = bcm2835_pctl_dt_node_to_map_pull(pc, np, pin,
+							pull, &cur_map);
+			if (err)
+				goto out;
+		}
+	}
+
+	*map = maps;
+	*num_maps = num_pins * maps_per_pin;
+
+	return 0;
+
+out:
+	kfree(maps);
+	return err;
+}
+
+static const struct pinctrl_ops bcm2835_pctl_ops = {
+	.get_groups_count = bcm2835_pctl_get_groups_count,
+	.get_group_name = bcm2835_pctl_get_group_name,
+	.get_group_pins = bcm2835_pctl_get_group_pins,
+	.pin_dbg_show = bcm2835_pctl_pin_dbg_show,
+	.dt_node_to_map = bcm2835_pctl_dt_node_to_map,
+	.dt_free_map = bcm2835_pctl_dt_free_map,
+};
+
+static int bcm2835_pmx_get_functions_count(struct pinctrl_dev *pctldev)
+{
+	return BCM2835_FSEL_COUNT;
+}
+
+static const char *bcm2835_pmx_get_function_name(struct pinctrl_dev *pctldev,
+		unsigned selector)
+{
+	return bcm2835_functions[selector];
+}
+
+static int bcm2835_pmx_get_function_groups(struct pinctrl_dev *pctldev,
+		unsigned selector,
+		const char * const **groups,
+		unsigned * const num_groups)
+{
+	/* every pin can do every function */
+	*groups = bcm2835_gpio_groups;
+	*num_groups = ARRAY_SIZE(bcm2835_gpio_groups);
+
+	return 0;
+}
+
+static int bcm2835_pmx_set(struct pinctrl_dev *pctldev,
+		unsigned func_selector,
+		unsigned group_selector)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+
+	bcm2835_pinctrl_fsel_set(pc, group_selector, func_selector);
+
+	return 0;
+}
+
+static void bcm2835_pmx_gpio_disable_free(struct pinctrl_dev *pctldev,
+		struct pinctrl_gpio_range *range,
+		unsigned offset)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+
+	/* disable by setting to GPIO_IN */
+	bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN);
+}
+
+static int bcm2835_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
+		struct pinctrl_gpio_range *range,
+		unsigned offset,
+		bool input)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+	enum bcm2835_fsel fsel = input ?
+		BCM2835_FSEL_GPIO_IN : BCM2835_FSEL_GPIO_OUT;
+
+	bcm2835_pinctrl_fsel_set(pc, offset, fsel);
+
+	return 0;
+}
+
+static const struct pinmux_ops bcm2835_pmx_ops = {
+	.get_functions_count = bcm2835_pmx_get_functions_count,
+	.get_function_name = bcm2835_pmx_get_function_name,
+	.get_function_groups = bcm2835_pmx_get_function_groups,
+	.set_mux = bcm2835_pmx_set,
+	.gpio_disable_free = bcm2835_pmx_gpio_disable_free,
+	.gpio_set_direction = bcm2835_pmx_gpio_set_direction,
+};
+
+static int bcm2835_pinconf_get(struct pinctrl_dev *pctldev,
+			unsigned pin, unsigned long *config)
+{
+	/* No way to read back config in HW */
+	return -ENOTSUPP;
+}
+
+static int bcm2835_pinconf_set(struct pinctrl_dev *pctldev,
+			unsigned pin, unsigned long *configs,
+			unsigned num_configs)
+{
+	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
+	enum bcm2835_pinconf_param param;
+	u16 arg;
+	u32 off, bit;
+	int i;
+
+	for (i = 0; i < num_configs; i++) {
+		param = BCM2835_PINCONF_UNPACK_PARAM(configs[i]);
+		arg = BCM2835_PINCONF_UNPACK_ARG(configs[i]);
+
+		if (param != BCM2835_PINCONF_PARAM_PULL)
+			return -EINVAL;
+
+		off = GPIO_REG_OFFSET(pin);
+		bit = GPIO_REG_SHIFT(pin);
+
+		bcm2835_gpio_wr(pc, GPPUD, arg & 3);
+		/*
+		 * Docs say to wait 150 cycles, but not of what. We assume a
+		 * 1 MHz clock here, which is pretty slow...
+		 */
+		udelay(150);
+		bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), BIT(bit));
+		udelay(150);
+		bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), 0);
+	} /* for each config */
+
+	return 0;
+}
+
+static const struct pinconf_ops bcm2835_pinconf_ops = {
+	.pin_config_get = bcm2835_pinconf_get,
+	.pin_config_set = bcm2835_pinconf_set,
+};
+
+static struct pinctrl_desc bcm2835_pinctrl_desc = {
+	.name = MODULE_NAME,
+	.pins = bcm2835_gpio_pins,
+	.npins = ARRAY_SIZE(bcm2835_gpio_pins),
+	.pctlops = &bcm2835_pctl_ops,
+	.pmxops = &bcm2835_pmx_ops,
+	.confops = &bcm2835_pinconf_ops,
+	.owner = THIS_MODULE,
+};
+
+static struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = {
+	.name = MODULE_NAME,
+	.npins = BCM2835_NUM_GPIOS,
+};
+
+static int bcm2835_pinctrl_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct bcm2835_pinctrl *pc;
+	struct resource iomem;
+	int err, i;
+	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_pins) != BCM2835_NUM_GPIOS);
+	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_groups) != BCM2835_NUM_GPIOS);
+
+	pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
+	if (!pc)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, pc);
+	pc->dev = dev;
+
+	err = of_address_to_resource(np, 0, &iomem);
+	if (err) {
+		dev_err(dev, "could not get IO memory\n");
+		return err;
+	}
+
+	pc->base = devm_ioremap_resource(dev, &iomem);
+	if (IS_ERR(pc->base))
+		return PTR_ERR(pc->base);
+
+	pc->gpio_chip = bcm2835_gpio_chip;
+	pc->gpio_chip.dev = dev;
+	pc->gpio_chip.of_node = np;
+
+	pc->irq_domain = irq_domain_add_linear(np, BCM2835_NUM_GPIOS,
+			&irq_domain_simple_ops, NULL);
+	if (!pc->irq_domain) {
+		dev_err(dev, "could not create IRQ domain\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < BCM2835_NUM_GPIOS; i++) {
+		int irq = irq_create_mapping(pc->irq_domain, i);
+		irq_set_lockdep_class(irq, &gpio_lock_class);
+		irq_set_chip_and_handler(irq, &bcm2835_gpio_irq_chip,
+				handle_simple_irq);
+		irq_set_chip_data(irq, pc);
+		set_irq_flags(irq, IRQF_VALID);
+	}
+
+	for (i = 0; i < BCM2835_NUM_BANKS; i++) {
+		unsigned long events;
+		unsigned offset;
+		int len;
+		char *name;
+
+		/* clear event detection flags */
+		bcm2835_gpio_wr(pc, GPREN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPFEN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPHEN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPLEN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPAREN0 + i * 4, 0);
+		bcm2835_gpio_wr(pc, GPAFEN0 + i * 4, 0);
+
+		/* clear all the events */
+		events = bcm2835_gpio_rd(pc, GPEDS0 + i * 4);
+		for_each_set_bit(offset, &events, 32)
+			bcm2835_gpio_wr(pc, GPEDS0 + i * 4, BIT(offset));
+
+		pc->irq[i] = irq_of_parse_and_map(np, i);
+		pc->irq_data[i].pc = pc;
+		pc->irq_data[i].bank = i;
+		spin_lock_init(&pc->irq_lock[i]);
+
+		len = strlen(dev_name(pc->dev)) + 16;
+		name = devm_kzalloc(pc->dev, len, GFP_KERNEL);
+		if (!name)
+			return -ENOMEM;
+		snprintf(name, len, "%s:bank%d", dev_name(pc->dev), i);
+
+		err = devm_request_irq(dev, pc->irq[i],
+			bcm2835_gpio_irq_handler, IRQF_SHARED,
+			name, &pc->irq_data[i]);
+		if (err) {
+			dev_err(dev, "unable to request IRQ %d\n", pc->irq[i]);
+			return err;
+		}
+	}
+
+	err = gpiochip_add(&pc->gpio_chip);
+	if (err) {
+		dev_err(dev, "could not add GPIO chip\n");
+		return err;
+	}
+
+	pc->pctl_dev = pinctrl_register(&bcm2835_pinctrl_desc, dev, pc);
+	if (!pc->pctl_dev) {
+		gpiochip_remove(&pc->gpio_chip);
+		return -EINVAL;
+	}
+
+	pc->gpio_range = bcm2835_pinctrl_gpio_range;
+	pc->gpio_range.base = pc->gpio_chip.base;
+	pc->gpio_range.gc = &pc->gpio_chip;
+	pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
+
+	return 0;
+}
+
+static int bcm2835_pinctrl_remove(struct platform_device *pdev)
+{
+	struct bcm2835_pinctrl *pc = platform_get_drvdata(pdev);
+
+	pinctrl_unregister(pc->pctl_dev);
+	gpiochip_remove(&pc->gpio_chip);
+
+	return 0;
+}
+
+static struct of_device_id bcm2835_pinctrl_match[] = {
+	{ .compatible = "brcm,bcm2835-gpio" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, bcm2835_pinctrl_match);
+
+static struct platform_driver bcm2835_pinctrl_driver = {
+	.probe = bcm2835_pinctrl_probe,
+	.remove = bcm2835_pinctrl_remove,
+	.driver = {
+		.name = MODULE_NAME,
+		.of_match_table = bcm2835_pinctrl_match,
+	},
+};
+module_platform_driver(bcm2835_pinctrl_driver);
+
+MODULE_AUTHOR("Chris Boot, Simon Arlott, Stephen Warren");
+MODULE_DESCRIPTION("BCM2835 Pin control driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/pinctrl/pinctrl-bcm281xx.c b/drivers/pinctrl/pinctrl-bcm281xx.c
deleted file mode 100644
index fa2a00f..0000000
--- a/drivers/pinctrl/pinctrl-bcm281xx.c
+++ /dev/null
@@ -1,1455 +0,0 @@
-/*
- * Copyright (C) 2013 Broadcom Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation version 2.
- *
- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
- * kind, whether express or implied; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/pinctrl/pinctrl.h>
-#include <linux/pinctrl/pinmux.h>
-#include <linux/pinctrl/pinconf.h>
-#include <linux/pinctrl/pinconf-generic.h>
-#include <linux/regmap.h>
-#include <linux/slab.h>
-#include "core.h"
-#include "pinctrl-utils.h"
-
-/* BCM281XX Pin Control Registers Definitions */
-
-/* Function Select bits are the same for all pin control registers */
-#define BCM281XX_PIN_REG_F_SEL_MASK		0x0700
-#define BCM281XX_PIN_REG_F_SEL_SHIFT		8
-
-/* Standard pin register */
-#define BCM281XX_STD_PIN_REG_DRV_STR_MASK	0x0007
-#define BCM281XX_STD_PIN_REG_DRV_STR_SHIFT	0
-#define BCM281XX_STD_PIN_REG_INPUT_DIS_MASK	0x0008
-#define BCM281XX_STD_PIN_REG_INPUT_DIS_SHIFT	3
-#define BCM281XX_STD_PIN_REG_SLEW_MASK		0x0010
-#define BCM281XX_STD_PIN_REG_SLEW_SHIFT		4
-#define BCM281XX_STD_PIN_REG_PULL_UP_MASK	0x0020
-#define BCM281XX_STD_PIN_REG_PULL_UP_SHIFT	5
-#define BCM281XX_STD_PIN_REG_PULL_DN_MASK	0x0040
-#define BCM281XX_STD_PIN_REG_PULL_DN_SHIFT	6
-#define BCM281XX_STD_PIN_REG_HYST_MASK		0x0080
-#define BCM281XX_STD_PIN_REG_HYST_SHIFT		7
-
-/* I2C pin register */
-#define BCM281XX_I2C_PIN_REG_INPUT_DIS_MASK	0x0004
-#define BCM281XX_I2C_PIN_REG_INPUT_DIS_SHIFT	2
-#define BCM281XX_I2C_PIN_REG_SLEW_MASK		0x0008
-#define BCM281XX_I2C_PIN_REG_SLEW_SHIFT		3
-#define BCM281XX_I2C_PIN_REG_PULL_UP_STR_MASK	0x0070
-#define BCM281XX_I2C_PIN_REG_PULL_UP_STR_SHIFT	4
-
-/* HDMI pin register */
-#define BCM281XX_HDMI_PIN_REG_INPUT_DIS_MASK	0x0008
-#define BCM281XX_HDMI_PIN_REG_INPUT_DIS_SHIFT	3
-#define BCM281XX_HDMI_PIN_REG_MODE_MASK		0x0010
-#define BCM281XX_HDMI_PIN_REG_MODE_SHIFT	4
-
-/**
- * bcm281xx_pin_type - types of pin register
- */
-enum bcm281xx_pin_type {
-	BCM281XX_PIN_TYPE_UNKNOWN = 0,
-	BCM281XX_PIN_TYPE_STD,
-	BCM281XX_PIN_TYPE_I2C,
-	BCM281XX_PIN_TYPE_HDMI,
-};
-
-static enum bcm281xx_pin_type std_pin = BCM281XX_PIN_TYPE_STD;
-static enum bcm281xx_pin_type i2c_pin = BCM281XX_PIN_TYPE_I2C;
-static enum bcm281xx_pin_type hdmi_pin = BCM281XX_PIN_TYPE_HDMI;
-
-/**
- * bcm281xx_pin_function- define pin function
- */
-struct bcm281xx_pin_function {
-	const char *name;
-	const char * const *groups;
-	const unsigned ngroups;
-};
-
-/**
- * bcm281xx_pinctrl_data - Broadcom-specific pinctrl data
- * @reg_base - base of pinctrl registers
- */
-struct bcm281xx_pinctrl_data {
-	void __iomem *reg_base;
-
-	/* List of all pins */
-	const struct pinctrl_pin_desc *pins;
-	const unsigned npins;
-
-	const struct bcm281xx_pin_function *functions;
-	const unsigned nfunctions;
-
-	struct regmap *regmap;
-};
-
-/*
- * Pin number definition.  The order here must be the same as defined in the
- * PADCTRLREG block in the RDB.
- */
-#define BCM281XX_PIN_ADCSYNC		0
-#define BCM281XX_PIN_BAT_RM		1
-#define BCM281XX_PIN_BSC1_SCL		2
-#define BCM281XX_PIN_BSC1_SDA		3
-#define BCM281XX_PIN_BSC2_SCL		4
-#define BCM281XX_PIN_BSC2_SDA		5
-#define BCM281XX_PIN_CLASSGPWR		6
-#define BCM281XX_PIN_CLK_CX8		7
-#define BCM281XX_PIN_CLKOUT_0		8
-#define BCM281XX_PIN_CLKOUT_1		9
-#define BCM281XX_PIN_CLKOUT_2		10
-#define BCM281XX_PIN_CLKOUT_3		11
-#define BCM281XX_PIN_CLKREQ_IN_0	12
-#define BCM281XX_PIN_CLKREQ_IN_1	13
-#define BCM281XX_PIN_CWS_SYS_REQ1	14
-#define BCM281XX_PIN_CWS_SYS_REQ2	15
-#define BCM281XX_PIN_CWS_SYS_REQ3	16
-#define BCM281XX_PIN_DIGMIC1_CLK	17
-#define BCM281XX_PIN_DIGMIC1_DQ		18
-#define BCM281XX_PIN_DIGMIC2_CLK	19
-#define BCM281XX_PIN_DIGMIC2_DQ		20
-#define BCM281XX_PIN_GPEN13		21
-#define BCM281XX_PIN_GPEN14		22
-#define BCM281XX_PIN_GPEN15		23
-#define BCM281XX_PIN_GPIO00		24
-#define BCM281XX_PIN_GPIO01		25
-#define BCM281XX_PIN_GPIO02		26
-#define BCM281XX_PIN_GPIO03		27
-#define BCM281XX_PIN_GPIO04		28
-#define BCM281XX_PIN_GPIO05		29
-#define BCM281XX_PIN_GPIO06		30
-#define BCM281XX_PIN_GPIO07		31
-#define BCM281XX_PIN_GPIO08		32
-#define BCM281XX_PIN_GPIO09		33
-#define BCM281XX_PIN_GPIO10		34
-#define BCM281XX_PIN_GPIO11		35
-#define BCM281XX_PIN_GPIO12		36
-#define BCM281XX_PIN_GPIO13		37
-#define BCM281XX_PIN_GPIO14		38
-#define BCM281XX_PIN_GPS_PABLANK	39
-#define BCM281XX_PIN_GPS_TMARK		40
-#define BCM281XX_PIN_HDMI_SCL		41
-#define BCM281XX_PIN_HDMI_SDA		42
-#define BCM281XX_PIN_IC_DM		43
-#define BCM281XX_PIN_IC_DP		44
-#define BCM281XX_PIN_KP_COL_IP_0	45
-#define BCM281XX_PIN_KP_COL_IP_1	46
-#define BCM281XX_PIN_KP_COL_IP_2	47
-#define BCM281XX_PIN_KP_COL_IP_3	48
-#define BCM281XX_PIN_KP_ROW_OP_0	49
-#define BCM281XX_PIN_KP_ROW_OP_1	50
-#define BCM281XX_PIN_KP_ROW_OP_2	51
-#define BCM281XX_PIN_KP_ROW_OP_3	52
-#define BCM281XX_PIN_LCD_B_0		53
-#define BCM281XX_PIN_LCD_B_1		54
-#define BCM281XX_PIN_LCD_B_2		55
-#define BCM281XX_PIN_LCD_B_3		56
-#define BCM281XX_PIN_LCD_B_4		57
-#define BCM281XX_PIN_LCD_B_5		58
-#define BCM281XX_PIN_LCD_B_6		59
-#define BCM281XX_PIN_LCD_B_7		60
-#define BCM281XX_PIN_LCD_G_0		61
-#define BCM281XX_PIN_LCD_G_1		62
-#define BCM281XX_PIN_LCD_G_2		63
-#define BCM281XX_PIN_LCD_G_3		64
-#define BCM281XX_PIN_LCD_G_4		65
-#define BCM281XX_PIN_LCD_G_5		66
-#define BCM281XX_PIN_LCD_G_6		67
-#define BCM281XX_PIN_LCD_G_7		68
-#define BCM281XX_PIN_LCD_HSYNC		69
-#define BCM281XX_PIN_LCD_OE		70
-#define BCM281XX_PIN_LCD_PCLK		71
-#define BCM281XX_PIN_LCD_R_0		72
-#define BCM281XX_PIN_LCD_R_1		73
-#define BCM281XX_PIN_LCD_R_2		74
-#define BCM281XX_PIN_LCD_R_3		75
-#define BCM281XX_PIN_LCD_R_4		76
-#define BCM281XX_PIN_LCD_R_5		77
-#define BCM281XX_PIN_LCD_R_6		78
-#define BCM281XX_PIN_LCD_R_7		79
-#define BCM281XX_PIN_LCD_VSYNC		80
-#define BCM281XX_PIN_MDMGPIO0		81
-#define BCM281XX_PIN_MDMGPIO1		82
-#define BCM281XX_PIN_MDMGPIO2		83
-#define BCM281XX_PIN_MDMGPIO3		84
-#define BCM281XX_PIN_MDMGPIO4		85
-#define BCM281XX_PIN_MDMGPIO5		86
-#define BCM281XX_PIN_MDMGPIO6		87
-#define BCM281XX_PIN_MDMGPIO7		88
-#define BCM281XX_PIN_MDMGPIO8		89
-#define BCM281XX_PIN_MPHI_DATA_0	90
-#define BCM281XX_PIN_MPHI_DATA_1	91
-#define BCM281XX_PIN_MPHI_DATA_2	92
-#define BCM281XX_PIN_MPHI_DATA_3	93
-#define BCM281XX_PIN_MPHI_DATA_4	94
-#define BCM281XX_PIN_MPHI_DATA_5	95
-#define BCM281XX_PIN_MPHI_DATA_6	96
-#define BCM281XX_PIN_MPHI_DATA_7	97
-#define BCM281XX_PIN_MPHI_DATA_8	98
-#define BCM281XX_PIN_MPHI_DATA_9	99
-#define BCM281XX_PIN_MPHI_DATA_10	100
-#define BCM281XX_PIN_MPHI_DATA_11	101
-#define BCM281XX_PIN_MPHI_DATA_12	102
-#define BCM281XX_PIN_MPHI_DATA_13	103
-#define BCM281XX_PIN_MPHI_DATA_14	104
-#define BCM281XX_PIN_MPHI_DATA_15	105
-#define BCM281XX_PIN_MPHI_HA0		106
-#define BCM281XX_PIN_MPHI_HAT0		107
-#define BCM281XX_PIN_MPHI_HAT1		108
-#define BCM281XX_PIN_MPHI_HCE0_N	109
-#define BCM281XX_PIN_MPHI_HCE1_N	110
-#define BCM281XX_PIN_MPHI_HRD_N		111
-#define BCM281XX_PIN_MPHI_HWR_N		112
-#define BCM281XX_PIN_MPHI_RUN0		113
-#define BCM281XX_PIN_MPHI_RUN1		114
-#define BCM281XX_PIN_MTX_SCAN_CLK	115
-#define BCM281XX_PIN_MTX_SCAN_DATA	116
-#define BCM281XX_PIN_NAND_AD_0		117
-#define BCM281XX_PIN_NAND_AD_1		118
-#define BCM281XX_PIN_NAND_AD_2		119
-#define BCM281XX_PIN_NAND_AD_3		120
-#define BCM281XX_PIN_NAND_AD_4		121
-#define BCM281XX_PIN_NAND_AD_5		122
-#define BCM281XX_PIN_NAND_AD_6		123
-#define BCM281XX_PIN_NAND_AD_7		124
-#define BCM281XX_PIN_NAND_ALE		125
-#define BCM281XX_PIN_NAND_CEN_0		126
-#define BCM281XX_PIN_NAND_CEN_1		127
-#define BCM281XX_PIN_NAND_CLE		128
-#define BCM281XX_PIN_NAND_OEN		129
-#define BCM281XX_PIN_NAND_RDY_0		130
-#define BCM281XX_PIN_NAND_RDY_1		131
-#define BCM281XX_PIN_NAND_WEN		132
-#define BCM281XX_PIN_NAND_WP		133
-#define BCM281XX_PIN_PC1		134
-#define BCM281XX_PIN_PC2		135
-#define BCM281XX_PIN_PMU_INT		136
-#define BCM281XX_PIN_PMU_SCL		137
-#define BCM281XX_PIN_PMU_SDA		138
-#define BCM281XX_PIN_RFST2G_MTSLOTEN3G	139
-#define BCM281XX_PIN_RGMII_0_RX_CTL	140
-#define BCM281XX_PIN_RGMII_0_RXC	141
-#define BCM281XX_PIN_RGMII_0_RXD_0	142
-#define BCM281XX_PIN_RGMII_0_RXD_1	143
-#define BCM281XX_PIN_RGMII_0_RXD_2	144
-#define BCM281XX_PIN_RGMII_0_RXD_3	145
-#define BCM281XX_PIN_RGMII_0_TX_CTL	146
-#define BCM281XX_PIN_RGMII_0_TXC	147
-#define BCM281XX_PIN_RGMII_0_TXD_0	148
-#define BCM281XX_PIN_RGMII_0_TXD_1	149
-#define BCM281XX_PIN_RGMII_0_TXD_2	150
-#define BCM281XX_PIN_RGMII_0_TXD_3	151
-#define BCM281XX_PIN_RGMII_1_RX_CTL	152
-#define BCM281XX_PIN_RGMII_1_RXC	153
-#define BCM281XX_PIN_RGMII_1_RXD_0	154
-#define BCM281XX_PIN_RGMII_1_RXD_1	155
-#define BCM281XX_PIN_RGMII_1_RXD_2	156
-#define BCM281XX_PIN_RGMII_1_RXD_3	157
-#define BCM281XX_PIN_RGMII_1_TX_CTL	158
-#define BCM281XX_PIN_RGMII_1_TXC	159
-#define BCM281XX_PIN_RGMII_1_TXD_0	160
-#define BCM281XX_PIN_RGMII_1_TXD_1	161
-#define BCM281XX_PIN_RGMII_1_TXD_2	162
-#define BCM281XX_PIN_RGMII_1_TXD_3	163
-#define BCM281XX_PIN_RGMII_GPIO_0	164
-#define BCM281XX_PIN_RGMII_GPIO_1	165
-#define BCM281XX_PIN_RGMII_GPIO_2	166
-#define BCM281XX_PIN_RGMII_GPIO_3	167
-#define BCM281XX_PIN_RTXDATA2G_TXDATA3G1	168
-#define BCM281XX_PIN_RTXEN2G_TXDATA3G2	169
-#define BCM281XX_PIN_RXDATA3G0		170
-#define BCM281XX_PIN_RXDATA3G1		171
-#define BCM281XX_PIN_RXDATA3G2		172
-#define BCM281XX_PIN_SDIO1_CLK		173
-#define BCM281XX_PIN_SDIO1_CMD		174
-#define BCM281XX_PIN_SDIO1_DATA_0	175
-#define BCM281XX_PIN_SDIO1_DATA_1	176
-#define BCM281XX_PIN_SDIO1_DATA_2	177
-#define BCM281XX_PIN_SDIO1_DATA_3	178
-#define BCM281XX_PIN_SDIO4_CLK		179
-#define BCM281XX_PIN_SDIO4_CMD		180
-#define BCM281XX_PIN_SDIO4_DATA_0	181
-#define BCM281XX_PIN_SDIO4_DATA_1	182
-#define BCM281XX_PIN_SDIO4_DATA_2	183
-#define BCM281XX_PIN_SDIO4_DATA_3	184
-#define BCM281XX_PIN_SIM_CLK		185
-#define BCM281XX_PIN_SIM_DATA		186
-#define BCM281XX_PIN_SIM_DET		187
-#define BCM281XX_PIN_SIM_RESETN		188
-#define BCM281XX_PIN_SIM2_CLK		189
-#define BCM281XX_PIN_SIM2_DATA		190
-#define BCM281XX_PIN_SIM2_DET		191
-#define BCM281XX_PIN_SIM2_RESETN	192
-#define BCM281XX_PIN_SRI_C		193
-#define BCM281XX_PIN_SRI_D		194
-#define BCM281XX_PIN_SRI_E		195
-#define BCM281XX_PIN_SSP_EXTCLK		196
-#define BCM281XX_PIN_SSP0_CLK		197
-#define BCM281XX_PIN_SSP0_FS		198
-#define BCM281XX_PIN_SSP0_RXD		199
-#define BCM281XX_PIN_SSP0_TXD		200
-#define BCM281XX_PIN_SSP2_CLK		201
-#define BCM281XX_PIN_SSP2_FS_0		202
-#define BCM281XX_PIN_SSP2_FS_1		203
-#define BCM281XX_PIN_SSP2_FS_2		204
-#define BCM281XX_PIN_SSP2_FS_3		205
-#define BCM281XX_PIN_SSP2_RXD_0		206
-#define BCM281XX_PIN_SSP2_RXD_1		207
-#define BCM281XX_PIN_SSP2_TXD_0		208
-#define BCM281XX_PIN_SSP2_TXD_1		209
-#define BCM281XX_PIN_SSP3_CLK		210
-#define BCM281XX_PIN_SSP3_FS		211
-#define BCM281XX_PIN_SSP3_RXD		212
-#define BCM281XX_PIN_SSP3_TXD		213
-#define BCM281XX_PIN_SSP4_CLK		214
-#define BCM281XX_PIN_SSP4_FS		215
-#define BCM281XX_PIN_SSP4_RXD		216
-#define BCM281XX_PIN_SSP4_TXD		217
-#define BCM281XX_PIN_SSP5_CLK		218
-#define BCM281XX_PIN_SSP5_FS		219
-#define BCM281XX_PIN_SSP5_RXD		220
-#define BCM281XX_PIN_SSP5_TXD		221
-#define BCM281XX_PIN_SSP6_CLK		222
-#define BCM281XX_PIN_SSP6_FS		223
-#define BCM281XX_PIN_SSP6_RXD		224
-#define BCM281XX_PIN_SSP6_TXD		225
-#define BCM281XX_PIN_STAT_1		226
-#define BCM281XX_PIN_STAT_2		227
-#define BCM281XX_PIN_SYSCLKEN		228
-#define BCM281XX_PIN_TRACECLK		229
-#define BCM281XX_PIN_TRACEDT00		230
-#define BCM281XX_PIN_TRACEDT01		231
-#define BCM281XX_PIN_TRACEDT02		232
-#define BCM281XX_PIN_TRACEDT03		233
-#define BCM281XX_PIN_TRACEDT04		234
-#define BCM281XX_PIN_TRACEDT05		235
-#define BCM281XX_PIN_TRACEDT06		236
-#define BCM281XX_PIN_TRACEDT07		237
-#define BCM281XX_PIN_TRACEDT08		238
-#define BCM281XX_PIN_TRACEDT09		239
-#define BCM281XX_PIN_TRACEDT10		240
-#define BCM281XX_PIN_TRACEDT11		241
-#define BCM281XX_PIN_TRACEDT12		242
-#define BCM281XX_PIN_TRACEDT13		243
-#define BCM281XX_PIN_TRACEDT14		244
-#define BCM281XX_PIN_TRACEDT15		245
-#define BCM281XX_PIN_TXDATA3G0		246
-#define BCM281XX_PIN_TXPWRIND		247
-#define BCM281XX_PIN_UARTB1_UCTS	248
-#define BCM281XX_PIN_UARTB1_URTS	249
-#define BCM281XX_PIN_UARTB1_URXD	250
-#define BCM281XX_PIN_UARTB1_UTXD	251
-#define BCM281XX_PIN_UARTB2_URXD	252
-#define BCM281XX_PIN_UARTB2_UTXD	253
-#define BCM281XX_PIN_UARTB3_UCTS	254
-#define BCM281XX_PIN_UARTB3_URTS	255
-#define BCM281XX_PIN_UARTB3_URXD	256
-#define BCM281XX_PIN_UARTB3_UTXD	257
-#define BCM281XX_PIN_UARTB4_UCTS	258
-#define BCM281XX_PIN_UARTB4_URTS	259
-#define BCM281XX_PIN_UARTB4_URXD	260
-#define BCM281XX_PIN_UARTB4_UTXD	261
-#define BCM281XX_PIN_VC_CAM1_SCL	262
-#define BCM281XX_PIN_VC_CAM1_SDA	263
-#define BCM281XX_PIN_VC_CAM2_SCL	264
-#define BCM281XX_PIN_VC_CAM2_SDA	265
-#define BCM281XX_PIN_VC_CAM3_SCL	266
-#define BCM281XX_PIN_VC_CAM3_SDA	267
-
-#define BCM281XX_PIN_DESC(a, b, c) \
-	{ .number = a, .name = b, .drv_data = &c##_pin }
-
-/*
- * Pin description definition.  The order here must be the same as defined in
- * the PADCTRLREG block in the RDB, since the pin number is used as an index
- * into this array.
- */
-static const struct pinctrl_pin_desc bcm281xx_pinctrl_pins[] = {
-	BCM281XX_PIN_DESC(BCM281XX_PIN_ADCSYNC, "adcsync", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BAT_RM, "bat_rm", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC1_SCL, "bsc1_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC1_SDA, "bsc1_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC2_SCL, "bsc2_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_BSC2_SDA, "bsc2_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLASSGPWR, "classgpwr", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLK_CX8, "clk_cx8", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_0, "clkout_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_1, "clkout_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_2, "clkout_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKOUT_3, "clkout_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKREQ_IN_0, "clkreq_in_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CLKREQ_IN_1, "clkreq_in_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ1, "cws_sys_req1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ2, "cws_sys_req2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_CWS_SYS_REQ3, "cws_sys_req3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC1_CLK, "digmic1_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC1_DQ, "digmic1_dq", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC2_CLK, "digmic2_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_DIGMIC2_DQ, "digmic2_dq", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN13, "gpen13", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN14, "gpen14", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPEN15, "gpen15", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO00, "gpio00", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO01, "gpio01", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO02, "gpio02", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO03, "gpio03", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO04, "gpio04", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO05, "gpio05", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO06, "gpio06", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO07, "gpio07", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO08, "gpio08", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO09, "gpio09", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO10, "gpio10", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO11, "gpio11", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO12, "gpio12", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO13, "gpio13", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPIO14, "gpio14", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPS_PABLANK, "gps_pablank", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_GPS_TMARK, "gps_tmark", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_HDMI_SCL, "hdmi_scl", hdmi),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_HDMI_SDA, "hdmi_sda", hdmi),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_IC_DM, "ic_dm", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_IC_DP, "ic_dp", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_0, "kp_col_ip_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_1, "kp_col_ip_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_2, "kp_col_ip_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_COL_IP_3, "kp_col_ip_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_0, "kp_row_op_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_1, "kp_row_op_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_2, "kp_row_op_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_KP_ROW_OP_3, "kp_row_op_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_0, "lcd_b_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_1, "lcd_b_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_2, "lcd_b_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_3, "lcd_b_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_4, "lcd_b_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_5, "lcd_b_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_6, "lcd_b_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_B_7, "lcd_b_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_0, "lcd_g_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_1, "lcd_g_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_2, "lcd_g_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_3, "lcd_g_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_4, "lcd_g_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_5, "lcd_g_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_6, "lcd_g_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_G_7, "lcd_g_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_HSYNC, "lcd_hsync", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_OE, "lcd_oe", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_PCLK, "lcd_pclk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_0, "lcd_r_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_1, "lcd_r_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_2, "lcd_r_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_3, "lcd_r_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_4, "lcd_r_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_5, "lcd_r_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_6, "lcd_r_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_R_7, "lcd_r_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_LCD_VSYNC, "lcd_vsync", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO0, "mdmgpio0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO1, "mdmgpio1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO2, "mdmgpio2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO3, "mdmgpio3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO4, "mdmgpio4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO5, "mdmgpio5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO6, "mdmgpio6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO7, "mdmgpio7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MDMGPIO8, "mdmgpio8", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_0, "mphi_data_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_1, "mphi_data_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_2, "mphi_data_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_3, "mphi_data_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_4, "mphi_data_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_5, "mphi_data_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_6, "mphi_data_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_7, "mphi_data_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_8, "mphi_data_8", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_9, "mphi_data_9", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_10, "mphi_data_10", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_11, "mphi_data_11", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_12, "mphi_data_12", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_13, "mphi_data_13", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_14, "mphi_data_14", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_DATA_15, "mphi_data_15", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HA0, "mphi_ha0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HAT0, "mphi_hat0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HAT1, "mphi_hat1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HCE0_N, "mphi_hce0_n", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HCE1_N, "mphi_hce1_n", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HRD_N, "mphi_hrd_n", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_HWR_N, "mphi_hwr_n", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_RUN0, "mphi_run0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MPHI_RUN1, "mphi_run1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MTX_SCAN_CLK, "mtx_scan_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_MTX_SCAN_DATA, "mtx_scan_data", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_0, "nand_ad_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_1, "nand_ad_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_2, "nand_ad_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_3, "nand_ad_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_4, "nand_ad_4", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_5, "nand_ad_5", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_6, "nand_ad_6", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_AD_7, "nand_ad_7", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_ALE, "nand_ale", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CEN_0, "nand_cen_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CEN_1, "nand_cen_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_CLE, "nand_cle", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_OEN, "nand_oen", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_RDY_0, "nand_rdy_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_RDY_1, "nand_rdy_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_WEN, "nand_wen", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_NAND_WP, "nand_wp", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PC1, "pc1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PC2, "pc2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_INT, "pmu_int", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_SCL, "pmu_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_PMU_SDA, "pmu_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RFST2G_MTSLOTEN3G, "rfst2g_mtsloten3g",
-		std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RX_CTL, "rgmii_0_rx_ctl", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXC, "rgmii_0_rxc", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_0, "rgmii_0_rxd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_1, "rgmii_0_rxd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_2, "rgmii_0_rxd_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_RXD_3, "rgmii_0_rxd_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TX_CTL, "rgmii_0_tx_ctl", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXC, "rgmii_0_txc", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_0, "rgmii_0_txd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_1, "rgmii_0_txd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_2, "rgmii_0_txd_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_0_TXD_3, "rgmii_0_txd_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RX_CTL, "rgmii_1_rx_ctl", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXC, "rgmii_1_rxc", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_0, "rgmii_1_rxd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_1, "rgmii_1_rxd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_2, "rgmii_1_rxd_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_RXD_3, "rgmii_1_rxd_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TX_CTL, "rgmii_1_tx_ctl", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXC, "rgmii_1_txc", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_0, "rgmii_1_txd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_1, "rgmii_1_txd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_2, "rgmii_1_txd_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_1_TXD_3, "rgmii_1_txd_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_0, "rgmii_gpio_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_1, "rgmii_gpio_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_2, "rgmii_gpio_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RGMII_GPIO_3, "rgmii_gpio_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RTXDATA2G_TXDATA3G1,
-		"rtxdata2g_txdata3g1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RTXEN2G_TXDATA3G2, "rtxen2g_txdata3g2",
-		std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G0, "rxdata3g0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G1, "rxdata3g1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_RXDATA3G2, "rxdata3g2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_CLK, "sdio1_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_CMD, "sdio1_cmd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_0, "sdio1_data_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_1, "sdio1_data_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_2, "sdio1_data_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO1_DATA_3, "sdio1_data_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_CLK, "sdio4_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_CMD, "sdio4_cmd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_0, "sdio4_data_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_1, "sdio4_data_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_2, "sdio4_data_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SDIO4_DATA_3, "sdio4_data_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_CLK, "sim_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_DATA, "sim_data", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_DET, "sim_det", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM_RESETN, "sim_resetn", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_CLK, "sim2_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_DATA, "sim2_data", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_DET, "sim2_det", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SIM2_RESETN, "sim2_resetn", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_C, "sri_c", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_D, "sri_d", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SRI_E, "sri_e", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP_EXTCLK, "ssp_extclk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_CLK, "ssp0_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_FS, "ssp0_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_RXD, "ssp0_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP0_TXD, "ssp0_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_CLK, "ssp2_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_0, "ssp2_fs_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_1, "ssp2_fs_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_2, "ssp2_fs_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_FS_3, "ssp2_fs_3", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_RXD_0, "ssp2_rxd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_RXD_1, "ssp2_rxd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_TXD_0, "ssp2_txd_0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP2_TXD_1, "ssp2_txd_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_CLK, "ssp3_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_FS, "ssp3_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_RXD, "ssp3_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP3_TXD, "ssp3_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_CLK, "ssp4_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_FS, "ssp4_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_RXD, "ssp4_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP4_TXD, "ssp4_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_CLK, "ssp5_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_FS, "ssp5_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_RXD, "ssp5_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP5_TXD, "ssp5_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_CLK, "ssp6_clk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_FS, "ssp6_fs", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_RXD, "ssp6_rxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SSP6_TXD, "ssp6_txd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_STAT_1, "stat_1", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_STAT_2, "stat_2", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_SYSCLKEN, "sysclken", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACECLK, "traceclk", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT00, "tracedt00", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT01, "tracedt01", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT02, "tracedt02", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT03, "tracedt03", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT04, "tracedt04", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT05, "tracedt05", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT06, "tracedt06", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT07, "tracedt07", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT08, "tracedt08", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT09, "tracedt09", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT10, "tracedt10", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT11, "tracedt11", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT12, "tracedt12", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT13, "tracedt13", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT14, "tracedt14", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TRACEDT15, "tracedt15", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TXDATA3G0, "txdata3g0", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_TXPWRIND, "txpwrind", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_UCTS, "uartb1_ucts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_URTS, "uartb1_urts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_URXD, "uartb1_urxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB1_UTXD, "uartb1_utxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB2_URXD, "uartb2_urxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB2_UTXD, "uartb2_utxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_UCTS, "uartb3_ucts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_URTS, "uartb3_urts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_URXD, "uartb3_urxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB3_UTXD, "uartb3_utxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_UCTS, "uartb4_ucts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_URTS, "uartb4_urts", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_URXD, "uartb4_urxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_UARTB4_UTXD, "uartb4_utxd", std),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM1_SCL, "vc_cam1_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM1_SDA, "vc_cam1_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM2_SCL, "vc_cam2_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM2_SDA, "vc_cam2_sda", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM3_SCL, "vc_cam3_scl", i2c),
-	BCM281XX_PIN_DESC(BCM281XX_PIN_VC_CAM3_SDA, "vc_cam3_sda", i2c),
-};
-
-static const char * const bcm281xx_alt_groups[] = {
-	"adcsync",
-	"bat_rm",
-	"bsc1_scl",
-	"bsc1_sda",
-	"bsc2_scl",
-	"bsc2_sda",
-	"classgpwr",
-	"clk_cx8",
-	"clkout_0",
-	"clkout_1",
-	"clkout_2",
-	"clkout_3",
-	"clkreq_in_0",
-	"clkreq_in_1",
-	"cws_sys_req1",
-	"cws_sys_req2",
-	"cws_sys_req3",
-	"digmic1_clk",
-	"digmic1_dq",
-	"digmic2_clk",
-	"digmic2_dq",
-	"gpen13",
-	"gpen14",
-	"gpen15",
-	"gpio00",
-	"gpio01",
-	"gpio02",
-	"gpio03",
-	"gpio04",
-	"gpio05",
-	"gpio06",
-	"gpio07",
-	"gpio08",
-	"gpio09",
-	"gpio10",
-	"gpio11",
-	"gpio12",
-	"gpio13",
-	"gpio14",
-	"gps_pablank",
-	"gps_tmark",
-	"hdmi_scl",
-	"hdmi_sda",
-	"ic_dm",
-	"ic_dp",
-	"kp_col_ip_0",
-	"kp_col_ip_1",
-	"kp_col_ip_2",
-	"kp_col_ip_3",
-	"kp_row_op_0",
-	"kp_row_op_1",
-	"kp_row_op_2",
-	"kp_row_op_3",
-	"lcd_b_0",
-	"lcd_b_1",
-	"lcd_b_2",
-	"lcd_b_3",
-	"lcd_b_4",
-	"lcd_b_5",
-	"lcd_b_6",
-	"lcd_b_7",
-	"lcd_g_0",
-	"lcd_g_1",
-	"lcd_g_2",
-	"lcd_g_3",
-	"lcd_g_4",
-	"lcd_g_5",
-	"lcd_g_6",
-	"lcd_g_7",
-	"lcd_hsync",
-	"lcd_oe",
-	"lcd_pclk",
-	"lcd_r_0",
-	"lcd_r_1",
-	"lcd_r_2",
-	"lcd_r_3",
-	"lcd_r_4",
-	"lcd_r_5",
-	"lcd_r_6",
-	"lcd_r_7",
-	"lcd_vsync",
-	"mdmgpio0",
-	"mdmgpio1",
-	"mdmgpio2",
-	"mdmgpio3",
-	"mdmgpio4",
-	"mdmgpio5",
-	"mdmgpio6",
-	"mdmgpio7",
-	"mdmgpio8",
-	"mphi_data_0",
-	"mphi_data_1",
-	"mphi_data_2",
-	"mphi_data_3",
-	"mphi_data_4",
-	"mphi_data_5",
-	"mphi_data_6",
-	"mphi_data_7",
-	"mphi_data_8",
-	"mphi_data_9",
-	"mphi_data_10",
-	"mphi_data_11",
-	"mphi_data_12",
-	"mphi_data_13",
-	"mphi_data_14",
-	"mphi_data_15",
-	"mphi_ha0",
-	"mphi_hat0",
-	"mphi_hat1",
-	"mphi_hce0_n",
-	"mphi_hce1_n",
-	"mphi_hrd_n",
-	"mphi_hwr_n",
-	"mphi_run0",
-	"mphi_run1",
-	"mtx_scan_clk",
-	"mtx_scan_data",
-	"nand_ad_0",
-	"nand_ad_1",
-	"nand_ad_2",
-	"nand_ad_3",
-	"nand_ad_4",
-	"nand_ad_5",
-	"nand_ad_6",
-	"nand_ad_7",
-	"nand_ale",
-	"nand_cen_0",
-	"nand_cen_1",
-	"nand_cle",
-	"nand_oen",
-	"nand_rdy_0",
-	"nand_rdy_1",
-	"nand_wen",
-	"nand_wp",
-	"pc1",
-	"pc2",
-	"pmu_int",
-	"pmu_scl",
-	"pmu_sda",
-	"rfst2g_mtsloten3g",
-	"rgmii_0_rx_ctl",
-	"rgmii_0_rxc",
-	"rgmii_0_rxd_0",
-	"rgmii_0_rxd_1",
-	"rgmii_0_rxd_2",
-	"rgmii_0_rxd_3",
-	"rgmii_0_tx_ctl",
-	"rgmii_0_txc",
-	"rgmii_0_txd_0",
-	"rgmii_0_txd_1",
-	"rgmii_0_txd_2",
-	"rgmii_0_txd_3",
-	"rgmii_1_rx_ctl",
-	"rgmii_1_rxc",
-	"rgmii_1_rxd_0",
-	"rgmii_1_rxd_1",
-	"rgmii_1_rxd_2",
-	"rgmii_1_rxd_3",
-	"rgmii_1_tx_ctl",
-	"rgmii_1_txc",
-	"rgmii_1_txd_0",
-	"rgmii_1_txd_1",
-	"rgmii_1_txd_2",
-	"rgmii_1_txd_3",
-	"rgmii_gpio_0",
-	"rgmii_gpio_1",
-	"rgmii_gpio_2",
-	"rgmii_gpio_3",
-	"rtxdata2g_txdata3g1",
-	"rtxen2g_txdata3g2",
-	"rxdata3g0",
-	"rxdata3g1",
-	"rxdata3g2",
-	"sdio1_clk",
-	"sdio1_cmd",
-	"sdio1_data_0",
-	"sdio1_data_1",
-	"sdio1_data_2",
-	"sdio1_data_3",
-	"sdio4_clk",
-	"sdio4_cmd",
-	"sdio4_data_0",
-	"sdio4_data_1",
-	"sdio4_data_2",
-	"sdio4_data_3",
-	"sim_clk",
-	"sim_data",
-	"sim_det",
-	"sim_resetn",
-	"sim2_clk",
-	"sim2_data",
-	"sim2_det",
-	"sim2_resetn",
-	"sri_c",
-	"sri_d",
-	"sri_e",
-	"ssp_extclk",
-	"ssp0_clk",
-	"ssp0_fs",
-	"ssp0_rxd",
-	"ssp0_txd",
-	"ssp2_clk",
-	"ssp2_fs_0",
-	"ssp2_fs_1",
-	"ssp2_fs_2",
-	"ssp2_fs_3",
-	"ssp2_rxd_0",
-	"ssp2_rxd_1",
-	"ssp2_txd_0",
-	"ssp2_txd_1",
-	"ssp3_clk",
-	"ssp3_fs",
-	"ssp3_rxd",
-	"ssp3_txd",
-	"ssp4_clk",
-	"ssp4_fs",
-	"ssp4_rxd",
-	"ssp4_txd",
-	"ssp5_clk",
-	"ssp5_fs",
-	"ssp5_rxd",
-	"ssp5_txd",
-	"ssp6_clk",
-	"ssp6_fs",
-	"ssp6_rxd",
-	"ssp6_txd",
-	"stat_1",
-	"stat_2",
-	"sysclken",
-	"traceclk",
-	"tracedt00",
-	"tracedt01",
-	"tracedt02",
-	"tracedt03",
-	"tracedt04",
-	"tracedt05",
-	"tracedt06",
-	"tracedt07",
-	"tracedt08",
-	"tracedt09",
-	"tracedt10",
-	"tracedt11",
-	"tracedt12",
-	"tracedt13",
-	"tracedt14",
-	"tracedt15",
-	"txdata3g0",
-	"txpwrind",
-	"uartb1_ucts",
-	"uartb1_urts",
-	"uartb1_urxd",
-	"uartb1_utxd",
-	"uartb2_urxd",
-	"uartb2_utxd",
-	"uartb3_ucts",
-	"uartb3_urts",
-	"uartb3_urxd",
-	"uartb3_utxd",
-	"uartb4_ucts",
-	"uartb4_urts",
-	"uartb4_urxd",
-	"uartb4_utxd",
-	"vc_cam1_scl",
-	"vc_cam1_sda",
-	"vc_cam2_scl",
-	"vc_cam2_sda",
-	"vc_cam3_scl",
-	"vc_cam3_sda",
-};
-
-/* Every pin can implement all ALT1-ALT4 functions */
-#define BCM281XX_PIN_FUNCTION(fcn_name)			\
-{							\
-	.name = #fcn_name,				\
-	.groups = bcm281xx_alt_groups,			\
-	.ngroups = ARRAY_SIZE(bcm281xx_alt_groups),	\
-}
-
-static const struct bcm281xx_pin_function bcm281xx_functions[] = {
-	BCM281XX_PIN_FUNCTION(alt1),
-	BCM281XX_PIN_FUNCTION(alt2),
-	BCM281XX_PIN_FUNCTION(alt3),
-	BCM281XX_PIN_FUNCTION(alt4),
-};
-
-static struct bcm281xx_pinctrl_data bcm281xx_pinctrl = {
-	.pins = bcm281xx_pinctrl_pins,
-	.npins = ARRAY_SIZE(bcm281xx_pinctrl_pins),
-	.functions = bcm281xx_functions,
-	.nfunctions = ARRAY_SIZE(bcm281xx_functions),
-};
-
-static inline enum bcm281xx_pin_type pin_type_get(struct pinctrl_dev *pctldev,
-						  unsigned pin)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	if (pin >= pdata->npins)
-		return BCM281XX_PIN_TYPE_UNKNOWN;
-
-	return *(enum bcm281xx_pin_type *)(pdata->pins[pin].drv_data);
-}
-
-#define BCM281XX_PIN_SHIFT(type, param) \
-	(BCM281XX_ ## type ## _PIN_REG_ ## param ## _SHIFT)
-
-#define BCM281XX_PIN_MASK(type, param) \
-	(BCM281XX_ ## type ## _PIN_REG_ ## param ## _MASK)
-
-/*
- * This helper function is used to build up the value and mask used to write to
- * a pin register, but does not actually write to the register.
- */
-static inline void bcm281xx_pin_update(u32 *reg_val, u32 *reg_mask,
-				       u32 param_val, u32 param_shift,
-				       u32 param_mask)
-{
-	*reg_val &= ~param_mask;
-	*reg_val |= (param_val << param_shift) & param_mask;
-	*reg_mask |= param_mask;
-}
-
-static struct regmap_config bcm281xx_pinctrl_regmap_config = {
-	.reg_bits = 32,
-	.reg_stride = 4,
-	.val_bits = 32,
-	.max_register = BCM281XX_PIN_VC_CAM3_SDA,
-};
-
-static int bcm281xx_pinctrl_get_groups_count(struct pinctrl_dev *pctldev)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	return pdata->npins;
-}
-
-static const char *bcm281xx_pinctrl_get_group_name(struct pinctrl_dev *pctldev,
-						   unsigned group)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	return pdata->pins[group].name;
-}
-
-static int bcm281xx_pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
-					   unsigned group,
-					   const unsigned **pins,
-					   unsigned *num_pins)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	*pins = &pdata->pins[group].number;
-	*num_pins = 1;
-
-	return 0;
-}
-
-static void bcm281xx_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
-					  struct seq_file *s,
-					  unsigned offset)
-{
-	seq_printf(s, " %s", dev_name(pctldev->dev));
-}
-
-static struct pinctrl_ops bcm281xx_pinctrl_ops = {
-	.get_groups_count = bcm281xx_pinctrl_get_groups_count,
-	.get_group_name = bcm281xx_pinctrl_get_group_name,
-	.get_group_pins = bcm281xx_pinctrl_get_group_pins,
-	.pin_dbg_show = bcm281xx_pinctrl_pin_dbg_show,
-	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
-	.dt_free_map = pinctrl_utils_dt_free_map,
-};
-
-static int bcm281xx_pinctrl_get_fcns_count(struct pinctrl_dev *pctldev)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	return pdata->nfunctions;
-}
-
-static const char *bcm281xx_pinctrl_get_fcn_name(struct pinctrl_dev *pctldev,
-						 unsigned function)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	return pdata->functions[function].name;
-}
-
-static int bcm281xx_pinctrl_get_fcn_groups(struct pinctrl_dev *pctldev,
-					   unsigned function,
-					   const char * const **groups,
-					   unsigned * const num_groups)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-
-	*groups = pdata->functions[function].groups;
-	*num_groups = pdata->functions[function].ngroups;
-
-	return 0;
-}
-
-static int bcm281xx_pinmux_set(struct pinctrl_dev *pctldev,
-			       unsigned function,
-			       unsigned group)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	const struct bcm281xx_pin_function *f = &pdata->functions[function];
-	u32 offset = 4 * pdata->pins[group].number;
-	int rc = 0;
-
-	dev_dbg(pctldev->dev,
-		"%s(): Enable function %s (%d) of pin %s (%d) @offset 0x%x.\n",
-		__func__, f->name, function, pdata->pins[group].name,
-		pdata->pins[group].number, offset);
-
-	rc = regmap_update_bits(pdata->regmap, offset,
-		BCM281XX_PIN_REG_F_SEL_MASK,
-		function << BCM281XX_PIN_REG_F_SEL_SHIFT);
-	if (rc)
-		dev_err(pctldev->dev,
-			"Error updating register for pin %s (%d).\n",
-			pdata->pins[group].name, pdata->pins[group].number);
-
-	return rc;
-}
-
-static struct pinmux_ops bcm281xx_pinctrl_pinmux_ops = {
-	.get_functions_count = bcm281xx_pinctrl_get_fcns_count,
-	.get_function_name = bcm281xx_pinctrl_get_fcn_name,
-	.get_function_groups = bcm281xx_pinctrl_get_fcn_groups,
-	.set_mux = bcm281xx_pinmux_set,
-};
-
-static int bcm281xx_pinctrl_pin_config_get(struct pinctrl_dev *pctldev,
-					   unsigned pin,
-					   unsigned long *config)
-{
-	return -ENOTSUPP;
-}
-
-
-/* Goes through the configs and update register val/mask */
-static int bcm281xx_std_pin_update(struct pinctrl_dev *pctldev,
-				   unsigned pin,
-				   unsigned long *configs,
-				   unsigned num_configs,
-				   u32 *val,
-				   u32 *mask)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	int i;
-	enum pin_config_param param;
-	u16 arg;
-
-	for (i = 0; i < num_configs; i++) {
-		param = pinconf_to_config_param(configs[i]);
-		arg = pinconf_to_config_argument(configs[i]);
-
-		switch (param) {
-		case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
-			arg = (arg >= 1 ? 1 : 0);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(STD, HYST),
-				BCM281XX_PIN_MASK(STD, HYST));
-			break;
-		/*
-		 * The pin bias can only be one of pull-up, pull-down, or
-		 * disable.  The user does not need to specify a value for the
-		 * property, and the default value from pinconf-generic is
-		 * ignored.
-		 */
-		case PIN_CONFIG_BIAS_DISABLE:
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(STD, PULL_UP),
-				BCM281XX_PIN_MASK(STD, PULL_UP));
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(STD, PULL_DN),
-				BCM281XX_PIN_MASK(STD, PULL_DN));
-			break;
-
-		case PIN_CONFIG_BIAS_PULL_UP:
-			bcm281xx_pin_update(val, mask, 1,
-				BCM281XX_PIN_SHIFT(STD, PULL_UP),
-				BCM281XX_PIN_MASK(STD, PULL_UP));
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(STD, PULL_DN),
-				BCM281XX_PIN_MASK(STD, PULL_DN));
-			break;
-
-		case PIN_CONFIG_BIAS_PULL_DOWN:
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(STD, PULL_UP),
-				BCM281XX_PIN_MASK(STD, PULL_UP));
-			bcm281xx_pin_update(val, mask, 1,
-				BCM281XX_PIN_SHIFT(STD, PULL_DN),
-				BCM281XX_PIN_MASK(STD, PULL_DN));
-			break;
-
-		case PIN_CONFIG_SLEW_RATE:
-			arg = (arg >= 1 ? 1 : 0);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(STD, SLEW),
-				BCM281XX_PIN_MASK(STD, SLEW));
-			break;
-
-		case PIN_CONFIG_INPUT_ENABLE:
-			/* inversed since register is for input _disable_ */
-			arg = (arg >= 1 ? 0 : 1);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(STD, INPUT_DIS),
-				BCM281XX_PIN_MASK(STD, INPUT_DIS));
-			break;
-
-		case PIN_CONFIG_DRIVE_STRENGTH:
-			/* Valid range is 2-16 mA, even numbers only */
-			if ((arg < 2) || (arg > 16) || (arg % 2)) {
-				dev_err(pctldev->dev,
-					"Invalid Drive Strength value (%d) for "
-					"pin %s (%d). Valid values are "
-					"(2..16) mA, even numbers only.\n",
-					arg, pdata->pins[pin].name, pin);
-				return -EINVAL;
-			}
-			bcm281xx_pin_update(val, mask, (arg/2)-1,
-				BCM281XX_PIN_SHIFT(STD, DRV_STR),
-				BCM281XX_PIN_MASK(STD, DRV_STR));
-			break;
-
-		default:
-			dev_err(pctldev->dev,
-				"Unrecognized pin config %d for pin %s (%d).\n",
-				param, pdata->pins[pin].name, pin);
-			return -EINVAL;
-
-		} /* switch config */
-	} /* for each config */
-
-	return 0;
-}
-
-/*
- * The pull-up strength for an I2C pin is represented by bits 4-6 in the
- * register with the following mapping:
- *   0b000: No pull-up
- *   0b001: 1200 Ohm
- *   0b010: 1800 Ohm
- *   0b011: 720 Ohm
- *   0b100: 2700 Ohm
- *   0b101: 831 Ohm
- *   0b110: 1080 Ohm
- *   0b111: 568 Ohm
- * This array maps pull-up strength in Ohms to register values (1+index).
- */
-static const u16 bcm281xx_pullup_map[] = {
-	1200, 1800, 720, 2700, 831, 1080, 568
-};
-
-/* Goes through the configs and update register val/mask */
-static int bcm281xx_i2c_pin_update(struct pinctrl_dev *pctldev,
-				   unsigned pin,
-				   unsigned long *configs,
-				   unsigned num_configs,
-				   u32 *val,
-				   u32 *mask)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	int i, j;
-	enum pin_config_param param;
-	u16 arg;
-
-	for (i = 0; i < num_configs; i++) {
-		param = pinconf_to_config_param(configs[i]);
-		arg = pinconf_to_config_argument(configs[i]);
-
-		switch (param) {
-		case PIN_CONFIG_BIAS_PULL_UP:
-			for (j = 0; j < ARRAY_SIZE(bcm281xx_pullup_map); j++)
-				if (bcm281xx_pullup_map[j] == arg)
-					break;
-
-			if (j == ARRAY_SIZE(bcm281xx_pullup_map)) {
-				dev_err(pctldev->dev,
-					"Invalid pull-up value (%d) for pin %s "
-					"(%d). Valid values are 568, 720, 831, "
-					"1080, 1200, 1800, 2700 Ohms.\n",
-					arg, pdata->pins[pin].name, pin);
-				return -EINVAL;
-			}
-
-			bcm281xx_pin_update(val, mask, j+1,
-				BCM281XX_PIN_SHIFT(I2C, PULL_UP_STR),
-				BCM281XX_PIN_MASK(I2C, PULL_UP_STR));
-			break;
-
-		case PIN_CONFIG_BIAS_DISABLE:
-			bcm281xx_pin_update(val, mask, 0,
-				BCM281XX_PIN_SHIFT(I2C, PULL_UP_STR),
-				BCM281XX_PIN_MASK(I2C, PULL_UP_STR));
-			break;
-
-		case PIN_CONFIG_SLEW_RATE:
-			arg = (arg >= 1 ? 1 : 0);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(I2C, SLEW),
-				BCM281XX_PIN_MASK(I2C, SLEW));
-			break;
-
-		case PIN_CONFIG_INPUT_ENABLE:
-			/* inversed since register is for input _disable_ */
-			arg = (arg >= 1 ? 0 : 1);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(I2C, INPUT_DIS),
-				BCM281XX_PIN_MASK(I2C, INPUT_DIS));
-			break;
-
-		default:
-			dev_err(pctldev->dev,
-				"Unrecognized pin config %d for pin %s (%d).\n",
-				param, pdata->pins[pin].name, pin);
-			return -EINVAL;
-
-		} /* switch config */
-	} /* for each config */
-
-	return 0;
-}
-
-/* Goes through the configs and update register val/mask */
-static int bcm281xx_hdmi_pin_update(struct pinctrl_dev *pctldev,
-				    unsigned pin,
-				    unsigned long *configs,
-				    unsigned num_configs,
-				    u32 *val,
-				    u32 *mask)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	int i;
-	enum pin_config_param param;
-	u16 arg;
-
-	for (i = 0; i < num_configs; i++) {
-		param = pinconf_to_config_param(configs[i]);
-		arg = pinconf_to_config_argument(configs[i]);
-
-		switch (param) {
-		case PIN_CONFIG_SLEW_RATE:
-			arg = (arg >= 1 ? 1 : 0);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(HDMI, MODE),
-				BCM281XX_PIN_MASK(HDMI, MODE));
-			break;
-
-		case PIN_CONFIG_INPUT_ENABLE:
-			/* inversed since register is for input _disable_ */
-			arg = (arg >= 1 ? 0 : 1);
-			bcm281xx_pin_update(val, mask, arg,
-				BCM281XX_PIN_SHIFT(HDMI, INPUT_DIS),
-				BCM281XX_PIN_MASK(HDMI, INPUT_DIS));
-			break;
-
-		default:
-			dev_err(pctldev->dev,
-				"Unrecognized pin config %d for pin %s (%d).\n",
-				param, pdata->pins[pin].name, pin);
-			return -EINVAL;
-
-		} /* switch config */
-	} /* for each config */
-
-	return 0;
-}
-
-static int bcm281xx_pinctrl_pin_config_set(struct pinctrl_dev *pctldev,
-					   unsigned pin,
-					   unsigned long *configs,
-					   unsigned num_configs)
-{
-	struct bcm281xx_pinctrl_data *pdata = pinctrl_dev_get_drvdata(pctldev);
-	enum bcm281xx_pin_type pin_type;
-	u32 offset = 4 * pin;
-	u32 cfg_val, cfg_mask;
-	int rc;
-
-	cfg_val = 0;
-	cfg_mask = 0;
-	pin_type = pin_type_get(pctldev, pin);
-
-	/* Different pins have different configuration options */
-	switch (pin_type) {
-	case BCM281XX_PIN_TYPE_STD:
-		rc = bcm281xx_std_pin_update(pctldev, pin, configs,
-			num_configs, &cfg_val, &cfg_mask);
-		break;
-
-	case BCM281XX_PIN_TYPE_I2C:
-		rc = bcm281xx_i2c_pin_update(pctldev, pin, configs,
-			num_configs, &cfg_val, &cfg_mask);
-		break;
-
-	case BCM281XX_PIN_TYPE_HDMI:
-		rc = bcm281xx_hdmi_pin_update(pctldev, pin, configs,
-			num_configs, &cfg_val, &cfg_mask);
-		break;
-
-	default:
-		dev_err(pctldev->dev, "Unknown pin type for pin %s (%d).\n",
-			pdata->pins[pin].name, pin);
-		return -EINVAL;
-
-	} /* switch pin type */
-
-	if (rc)
-		return rc;
-
-	dev_dbg(pctldev->dev,
-		"%s(): Set pin %s (%d) with config 0x%x, mask 0x%x\n",
-		__func__, pdata->pins[pin].name, pin, cfg_val, cfg_mask);
-
-	rc = regmap_update_bits(pdata->regmap, offset, cfg_mask, cfg_val);
-	if (rc) {
-		dev_err(pctldev->dev,
-			"Error updating register for pin %s (%d).\n",
-			pdata->pins[pin].name, pin);
-		return rc;
-	}
-
-	return 0;
-}
-
-static struct pinconf_ops bcm281xx_pinctrl_pinconf_ops = {
-	.pin_config_get = bcm281xx_pinctrl_pin_config_get,
-	.pin_config_set = bcm281xx_pinctrl_pin_config_set,
-};
-
-static struct pinctrl_desc bcm281xx_pinctrl_desc = {
-	/* name, pins, npins members initialized in probe function */
-	.pctlops = &bcm281xx_pinctrl_ops,
-	.pmxops = &bcm281xx_pinctrl_pinmux_ops,
-	.confops = &bcm281xx_pinctrl_pinconf_ops,
-	.owner = THIS_MODULE,
-};
-
-static int __init bcm281xx_pinctrl_probe(struct platform_device *pdev)
-{
-	struct bcm281xx_pinctrl_data *pdata = &bcm281xx_pinctrl;
-	struct resource *res;
-	struct pinctrl_dev *pctl;
-
-	/* So far We can assume there is only 1 bank of registers */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	pdata->reg_base = devm_ioremap_resource(&pdev->dev, res);
-	if (IS_ERR(pdata->reg_base)) {
-		dev_err(&pdev->dev, "Failed to ioremap MEM resource\n");
-		return -ENODEV;
-	}
-
-	/* Initialize the dynamic part of pinctrl_desc */
-	pdata->regmap = devm_regmap_init_mmio(&pdev->dev, pdata->reg_base,
-		&bcm281xx_pinctrl_regmap_config);
-	if (IS_ERR(pdata->regmap)) {
-		dev_err(&pdev->dev, "Regmap MMIO init failed.\n");
-		return -ENODEV;
-	}
-
-	bcm281xx_pinctrl_desc.name = dev_name(&pdev->dev);
-	bcm281xx_pinctrl_desc.pins = bcm281xx_pinctrl.pins;
-	bcm281xx_pinctrl_desc.npins = bcm281xx_pinctrl.npins;
-
-	pctl = pinctrl_register(&bcm281xx_pinctrl_desc,
-				&pdev->dev,
-				pdata);
-	if (!pctl) {
-		dev_err(&pdev->dev, "Failed to register pinctrl\n");
-		return -ENODEV;
-	}
-
-	platform_set_drvdata(pdev, pdata);
-
-	return 0;
-}
-
-static struct of_device_id bcm281xx_pinctrl_of_match[] = {
-	{ .compatible = "brcm,bcm11351-pinctrl", },
-	{ },
-};
-
-static struct platform_driver bcm281xx_pinctrl_driver = {
-	.driver = {
-		.name = "bcm281xx-pinctrl",
-		.of_match_table = bcm281xx_pinctrl_of_match,
-	},
-};
-
-module_platform_driver_probe(bcm281xx_pinctrl_driver, bcm281xx_pinctrl_probe);
-
-MODULE_AUTHOR("Broadcom Corporation <bcm-kernel-feedback-list@broadcom.com>");
-MODULE_AUTHOR("Sherman Yin <syin@broadcom.com>");
-MODULE_DESCRIPTION("Broadcom BCM281xx pinctrl driver");
-MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/pinctrl-bcm2835.c b/drivers/pinctrl/pinctrl-bcm2835.c
deleted file mode 100644
index 9aa8a3f..0000000
--- a/drivers/pinctrl/pinctrl-bcm2835.c
+++ /dev/null
@@ -1,1072 +0,0 @@
-/*
- * Driver for Broadcom BCM2835 GPIO unit (pinctrl + GPIO)
- *
- * Copyright (C) 2012 Chris Boot, Simon Arlott, Stephen Warren
- *
- * This driver is inspired by:
- * pinctrl-nomadik.c, please see original file for copyright information
- * pinctrl-tegra.c, please see original file for copyright information
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/bitmap.h>
-#include <linux/bug.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/irqdesc.h>
-#include <linux/irqdomain.h>
-#include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/of.h>
-#include <linux/of_irq.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/pinctrl/machine.h>
-#include <linux/pinctrl/pinconf.h>
-#include <linux/pinctrl/pinctrl.h>
-#include <linux/pinctrl/pinmux.h>
-#include <linux/platform_device.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-
-#define MODULE_NAME "pinctrl-bcm2835"
-#define BCM2835_NUM_GPIOS 54
-#define BCM2835_NUM_BANKS 2
-
-#define BCM2835_PIN_BITMAP_SZ \
-	DIV_ROUND_UP(BCM2835_NUM_GPIOS, sizeof(unsigned long) * 8)
-
-/* GPIO register offsets */
-#define GPFSEL0		0x0	/* Function Select */
-#define GPSET0		0x1c	/* Pin Output Set */
-#define GPCLR0		0x28	/* Pin Output Clear */
-#define GPLEV0		0x34	/* Pin Level */
-#define GPEDS0		0x40	/* Pin Event Detect Status */
-#define GPREN0		0x4c	/* Pin Rising Edge Detect Enable */
-#define GPFEN0		0x58	/* Pin Falling Edge Detect Enable */
-#define GPHEN0		0x64	/* Pin High Detect Enable */
-#define GPLEN0		0x70	/* Pin Low Detect Enable */
-#define GPAREN0		0x7c	/* Pin Async Rising Edge Detect */
-#define GPAFEN0		0x88	/* Pin Async Falling Edge Detect */
-#define GPPUD		0x94	/* Pin Pull-up/down Enable */
-#define GPPUDCLK0	0x98	/* Pin Pull-up/down Enable Clock */
-
-#define FSEL_REG(p)		(GPFSEL0 + (((p) / 10) * 4))
-#define FSEL_SHIFT(p)		(((p) % 10) * 3)
-#define GPIO_REG_OFFSET(p)	((p) / 32)
-#define GPIO_REG_SHIFT(p)	((p) % 32)
-
-enum bcm2835_pinconf_param {
-	/* argument: bcm2835_pinconf_pull */
-	BCM2835_PINCONF_PARAM_PULL,
-};
-
-enum bcm2835_pinconf_pull {
-	BCM2835_PINCONFIG_PULL_NONE,
-	BCM2835_PINCONFIG_PULL_DOWN,
-	BCM2835_PINCONFIG_PULL_UP,
-};
-
-#define BCM2835_PINCONF_PACK(_param_, _arg_) ((_param_) << 16 | (_arg_))
-#define BCM2835_PINCONF_UNPACK_PARAM(_conf_) ((_conf_) >> 16)
-#define BCM2835_PINCONF_UNPACK_ARG(_conf_) ((_conf_) & 0xffff)
-
-struct bcm2835_gpio_irqdata {
-	struct bcm2835_pinctrl *pc;
-	int bank;
-};
-
-struct bcm2835_pinctrl {
-	struct device *dev;
-	void __iomem *base;
-	int irq[BCM2835_NUM_BANKS];
-
-	/* note: locking assumes each bank will have its own unsigned long */
-	unsigned long enabled_irq_map[BCM2835_NUM_BANKS];
-	unsigned int irq_type[BCM2835_NUM_GPIOS];
-
-	struct pinctrl_dev *pctl_dev;
-	struct irq_domain *irq_domain;
-	struct gpio_chip gpio_chip;
-	struct pinctrl_gpio_range gpio_range;
-
-	struct bcm2835_gpio_irqdata irq_data[BCM2835_NUM_BANKS];
-	spinlock_t irq_lock[BCM2835_NUM_BANKS];
-};
-
-static struct lock_class_key gpio_lock_class;
-
-/* pins are just named GPIO0..GPIO53 */
-#define BCM2835_GPIO_PIN(a) PINCTRL_PIN(a, "gpio" #a)
-static struct pinctrl_pin_desc bcm2835_gpio_pins[] = {
-	BCM2835_GPIO_PIN(0),
-	BCM2835_GPIO_PIN(1),
-	BCM2835_GPIO_PIN(2),
-	BCM2835_GPIO_PIN(3),
-	BCM2835_GPIO_PIN(4),
-	BCM2835_GPIO_PIN(5),
-	BCM2835_GPIO_PIN(6),
-	BCM2835_GPIO_PIN(7),
-	BCM2835_GPIO_PIN(8),
-	BCM2835_GPIO_PIN(9),
-	BCM2835_GPIO_PIN(10),
-	BCM2835_GPIO_PIN(11),
-	BCM2835_GPIO_PIN(12),
-	BCM2835_GPIO_PIN(13),
-	BCM2835_GPIO_PIN(14),
-	BCM2835_GPIO_PIN(15),
-	BCM2835_GPIO_PIN(16),
-	BCM2835_GPIO_PIN(17),
-	BCM2835_GPIO_PIN(18),
-	BCM2835_GPIO_PIN(19),
-	BCM2835_GPIO_PIN(20),
-	BCM2835_GPIO_PIN(21),
-	BCM2835_GPIO_PIN(22),
-	BCM2835_GPIO_PIN(23),
-	BCM2835_GPIO_PIN(24),
-	BCM2835_GPIO_PIN(25),
-	BCM2835_GPIO_PIN(26),
-	BCM2835_GPIO_PIN(27),
-	BCM2835_GPIO_PIN(28),
-	BCM2835_GPIO_PIN(29),
-	BCM2835_GPIO_PIN(30),
-	BCM2835_GPIO_PIN(31),
-	BCM2835_GPIO_PIN(32),
-	BCM2835_GPIO_PIN(33),
-	BCM2835_GPIO_PIN(34),
-	BCM2835_GPIO_PIN(35),
-	BCM2835_GPIO_PIN(36),
-	BCM2835_GPIO_PIN(37),
-	BCM2835_GPIO_PIN(38),
-	BCM2835_GPIO_PIN(39),
-	BCM2835_GPIO_PIN(40),
-	BCM2835_GPIO_PIN(41),
-	BCM2835_GPIO_PIN(42),
-	BCM2835_GPIO_PIN(43),
-	BCM2835_GPIO_PIN(44),
-	BCM2835_GPIO_PIN(45),
-	BCM2835_GPIO_PIN(46),
-	BCM2835_GPIO_PIN(47),
-	BCM2835_GPIO_PIN(48),
-	BCM2835_GPIO_PIN(49),
-	BCM2835_GPIO_PIN(50),
-	BCM2835_GPIO_PIN(51),
-	BCM2835_GPIO_PIN(52),
-	BCM2835_GPIO_PIN(53),
-};
-
-/* one pin per group */
-static const char * const bcm2835_gpio_groups[] = {
-	"gpio0",
-	"gpio1",
-	"gpio2",
-	"gpio3",
-	"gpio4",
-	"gpio5",
-	"gpio6",
-	"gpio7",
-	"gpio8",
-	"gpio9",
-	"gpio10",
-	"gpio11",
-	"gpio12",
-	"gpio13",
-	"gpio14",
-	"gpio15",
-	"gpio16",
-	"gpio17",
-	"gpio18",
-	"gpio19",
-	"gpio20",
-	"gpio21",
-	"gpio22",
-	"gpio23",
-	"gpio24",
-	"gpio25",
-	"gpio26",
-	"gpio27",
-	"gpio28",
-	"gpio29",
-	"gpio30",
-	"gpio31",
-	"gpio32",
-	"gpio33",
-	"gpio34",
-	"gpio35",
-	"gpio36",
-	"gpio37",
-	"gpio38",
-	"gpio39",
-	"gpio40",
-	"gpio41",
-	"gpio42",
-	"gpio43",
-	"gpio44",
-	"gpio45",
-	"gpio46",
-	"gpio47",
-	"gpio48",
-	"gpio49",
-	"gpio50",
-	"gpio51",
-	"gpio52",
-	"gpio53",
-};
-
-enum bcm2835_fsel {
-	BCM2835_FSEL_GPIO_IN = 0,
-	BCM2835_FSEL_GPIO_OUT = 1,
-	BCM2835_FSEL_ALT0 = 4,
-	BCM2835_FSEL_ALT1 = 5,
-	BCM2835_FSEL_ALT2 = 6,
-	BCM2835_FSEL_ALT3 = 7,
-	BCM2835_FSEL_ALT4 = 3,
-	BCM2835_FSEL_ALT5 = 2,
-	BCM2835_FSEL_COUNT = 8,
-	BCM2835_FSEL_MASK = 0x7,
-};
-
-static const char * const bcm2835_functions[BCM2835_FSEL_COUNT] = {
-	[BCM2835_FSEL_GPIO_IN] = "gpio_in",
-	[BCM2835_FSEL_GPIO_OUT] = "gpio_out",
-	[BCM2835_FSEL_ALT0] = "alt0",
-	[BCM2835_FSEL_ALT1] = "alt1",
-	[BCM2835_FSEL_ALT2] = "alt2",
-	[BCM2835_FSEL_ALT3] = "alt3",
-	[BCM2835_FSEL_ALT4] = "alt4",
-	[BCM2835_FSEL_ALT5] = "alt5",
-};
-
-static const char * const irq_type_names[] = {
-	[IRQ_TYPE_NONE] = "none",
-	[IRQ_TYPE_EDGE_RISING] = "edge-rising",
-	[IRQ_TYPE_EDGE_FALLING] = "edge-falling",
-	[IRQ_TYPE_EDGE_BOTH] = "edge-both",
-	[IRQ_TYPE_LEVEL_HIGH] = "level-high",
-	[IRQ_TYPE_LEVEL_LOW] = "level-low",
-};
-
-static inline u32 bcm2835_gpio_rd(struct bcm2835_pinctrl *pc, unsigned reg)
-{
-	return readl(pc->base + reg);
-}
-
-static inline void bcm2835_gpio_wr(struct bcm2835_pinctrl *pc, unsigned reg,
-		u32 val)
-{
-	writel(val, pc->base + reg);
-}
-
-static inline int bcm2835_gpio_get_bit(struct bcm2835_pinctrl *pc, unsigned reg,
-		unsigned bit)
-{
-	reg += GPIO_REG_OFFSET(bit) * 4;
-	return (bcm2835_gpio_rd(pc, reg) >> GPIO_REG_SHIFT(bit)) & 1;
-}
-
-/* note NOT a read/modify/write cycle */
-static inline void bcm2835_gpio_set_bit(struct bcm2835_pinctrl *pc,
-		unsigned reg, unsigned bit)
-{
-	reg += GPIO_REG_OFFSET(bit) * 4;
-	bcm2835_gpio_wr(pc, reg, BIT(GPIO_REG_SHIFT(bit)));
-}
-
-static inline enum bcm2835_fsel bcm2835_pinctrl_fsel_get(
-		struct bcm2835_pinctrl *pc, unsigned pin)
-{
-	u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
-	enum bcm2835_fsel status = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
-
-	dev_dbg(pc->dev, "get %08x (%u => %s)\n", val, pin,
-			bcm2835_functions[status]);
-
-	return status;
-}
-
-static inline void bcm2835_pinctrl_fsel_set(
-		struct bcm2835_pinctrl *pc, unsigned pin,
-		enum bcm2835_fsel fsel)
-{
-	u32 val = bcm2835_gpio_rd(pc, FSEL_REG(pin));
-	enum bcm2835_fsel cur = (val >> FSEL_SHIFT(pin)) & BCM2835_FSEL_MASK;
-
-	dev_dbg(pc->dev, "read %08x (%u => %s)\n", val, pin,
-			bcm2835_functions[cur]);
-
-	if (cur == fsel)
-		return;
-
-	if (cur != BCM2835_FSEL_GPIO_IN && fsel != BCM2835_FSEL_GPIO_IN) {
-		/* always transition through GPIO_IN */
-		val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
-		val |= BCM2835_FSEL_GPIO_IN << FSEL_SHIFT(pin);
-
-		dev_dbg(pc->dev, "trans %08x (%u <= %s)\n", val, pin,
-				bcm2835_functions[BCM2835_FSEL_GPIO_IN]);
-		bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
-	}
-
-	val &= ~(BCM2835_FSEL_MASK << FSEL_SHIFT(pin));
-	val |= fsel << FSEL_SHIFT(pin);
-
-	dev_dbg(pc->dev, "write %08x (%u <= %s)\n", val, pin,
-			bcm2835_functions[fsel]);
-	bcm2835_gpio_wr(pc, FSEL_REG(pin), val);
-}
-
-static int bcm2835_gpio_request(struct gpio_chip *chip, unsigned offset)
-{
-	return pinctrl_request_gpio(chip->base + offset);
-}
-
-static void bcm2835_gpio_free(struct gpio_chip *chip, unsigned offset)
-{
-	pinctrl_free_gpio(chip->base + offset);
-}
-
-static int bcm2835_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
-	return pinctrl_gpio_direction_input(chip->base + offset);
-}
-
-static int bcm2835_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
-	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
-
-	return bcm2835_gpio_get_bit(pc, GPLEV0, offset);
-}
-
-static int bcm2835_gpio_direction_output(struct gpio_chip *chip,
-		unsigned offset, int value)
-{
-	return pinctrl_gpio_direction_output(chip->base + offset);
-}
-
-static void bcm2835_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
-	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
-
-	bcm2835_gpio_set_bit(pc, value ? GPSET0 : GPCLR0, offset);
-}
-
-static int bcm2835_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-	struct bcm2835_pinctrl *pc = dev_get_drvdata(chip->dev);
-
-	return irq_linear_revmap(pc->irq_domain, offset);
-}
-
-static struct gpio_chip bcm2835_gpio_chip = {
-	.label = MODULE_NAME,
-	.owner = THIS_MODULE,
-	.request = bcm2835_gpio_request,
-	.free = bcm2835_gpio_free,
-	.direction_input = bcm2835_gpio_direction_input,
-	.direction_output = bcm2835_gpio_direction_output,
-	.get = bcm2835_gpio_get,
-	.set = bcm2835_gpio_set,
-	.to_irq = bcm2835_gpio_to_irq,
-	.base = -1,
-	.ngpio = BCM2835_NUM_GPIOS,
-	.can_sleep = false,
-};
-
-static irqreturn_t bcm2835_gpio_irq_handler(int irq, void *dev_id)
-{
-	struct bcm2835_gpio_irqdata *irqdata = dev_id;
-	struct bcm2835_pinctrl *pc = irqdata->pc;
-	int bank = irqdata->bank;
-	unsigned long events;
-	unsigned offset;
-	unsigned gpio;
-	unsigned int type;
-
-	events = bcm2835_gpio_rd(pc, GPEDS0 + bank * 4);
-	events &= pc->enabled_irq_map[bank];
-	for_each_set_bit(offset, &events, 32) {
-		gpio = (32 * bank) + offset;
-		type = pc->irq_type[gpio];
-
-		/* ack edge triggered IRQs immediately */
-		if (!(type & IRQ_TYPE_LEVEL_MASK))
-			bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
-
-		generic_handle_irq(irq_linear_revmap(pc->irq_domain, gpio));
-
-		/* ack level triggered IRQ after handling them */
-		if (type & IRQ_TYPE_LEVEL_MASK)
-			bcm2835_gpio_set_bit(pc, GPEDS0, gpio);
-	}
-	return events ? IRQ_HANDLED : IRQ_NONE;
-}
-
-static inline void __bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
-	unsigned reg, unsigned offset, bool enable)
-{
-	u32 value;
-	reg += GPIO_REG_OFFSET(offset) * 4;
-	value = bcm2835_gpio_rd(pc, reg);
-	if (enable)
-		value |= BIT(GPIO_REG_SHIFT(offset));
-	else
-		value &= ~(BIT(GPIO_REG_SHIFT(offset)));
-	bcm2835_gpio_wr(pc, reg, value);
-}
-
-/* fast path for IRQ handler */
-static void bcm2835_gpio_irq_config(struct bcm2835_pinctrl *pc,
-	unsigned offset, bool enable)
-{
-	switch (pc->irq_type[offset]) {
-	case IRQ_TYPE_EDGE_RISING:
-		__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
-		break;
-
-	case IRQ_TYPE_EDGE_FALLING:
-		__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
-		break;
-
-	case IRQ_TYPE_EDGE_BOTH:
-		__bcm2835_gpio_irq_config(pc, GPREN0, offset, enable);
-		__bcm2835_gpio_irq_config(pc, GPFEN0, offset, enable);
-		break;
-
-	case IRQ_TYPE_LEVEL_HIGH:
-		__bcm2835_gpio_irq_config(pc, GPHEN0, offset, enable);
-		break;
-
-	case IRQ_TYPE_LEVEL_LOW:
-		__bcm2835_gpio_irq_config(pc, GPLEN0, offset, enable);
-		break;
-	}
-}
-
-static void bcm2835_gpio_irq_enable(struct irq_data *data)
-{
-	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
-	unsigned gpio = irqd_to_hwirq(data);
-	unsigned offset = GPIO_REG_SHIFT(gpio);
-	unsigned bank = GPIO_REG_OFFSET(gpio);
-	unsigned long flags;
-
-	spin_lock_irqsave(&pc->irq_lock[bank], flags);
-	set_bit(offset, &pc->enabled_irq_map[bank]);
-	bcm2835_gpio_irq_config(pc, gpio, true);
-	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
-}
-
-static void bcm2835_gpio_irq_disable(struct irq_data *data)
-{
-	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
-	unsigned gpio = irqd_to_hwirq(data);
-	unsigned offset = GPIO_REG_SHIFT(gpio);
-	unsigned bank = GPIO_REG_OFFSET(gpio);
-	unsigned long flags;
-
-	spin_lock_irqsave(&pc->irq_lock[bank], flags);
-	bcm2835_gpio_irq_config(pc, gpio, false);
-	clear_bit(offset, &pc->enabled_irq_map[bank]);
-	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
-}
-
-static int __bcm2835_gpio_irq_set_type_disabled(struct bcm2835_pinctrl *pc,
-	unsigned offset, unsigned int type)
-{
-	switch (type) {
-	case IRQ_TYPE_NONE:
-	case IRQ_TYPE_EDGE_RISING:
-	case IRQ_TYPE_EDGE_FALLING:
-	case IRQ_TYPE_EDGE_BOTH:
-	case IRQ_TYPE_LEVEL_HIGH:
-	case IRQ_TYPE_LEVEL_LOW:
-		pc->irq_type[offset] = type;
-		break;
-
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-/* slower path for reconfiguring IRQ type */
-static int __bcm2835_gpio_irq_set_type_enabled(struct bcm2835_pinctrl *pc,
-	unsigned offset, unsigned int type)
-{
-	switch (type) {
-	case IRQ_TYPE_NONE:
-		if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-		}
-		break;
-
-	case IRQ_TYPE_EDGE_RISING:
-		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
-			/* RISING already enabled, disable FALLING */
-			pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-		} else if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-			bcm2835_gpio_irq_config(pc, offset, true);
-		}
-		break;
-
-	case IRQ_TYPE_EDGE_FALLING:
-		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_BOTH) {
-			/* FALLING already enabled, disable RISING */
-			pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-		} else if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-			bcm2835_gpio_irq_config(pc, offset, true);
-		}
-		break;
-
-	case IRQ_TYPE_EDGE_BOTH:
-		if (pc->irq_type[offset] == IRQ_TYPE_EDGE_RISING) {
-			/* RISING already enabled, enable FALLING too */
-			pc->irq_type[offset] = IRQ_TYPE_EDGE_FALLING;
-			bcm2835_gpio_irq_config(pc, offset, true);
-			pc->irq_type[offset] = type;
-		} else if (pc->irq_type[offset] == IRQ_TYPE_EDGE_FALLING) {
-			/* FALLING already enabled, enable RISING too */
-			pc->irq_type[offset] = IRQ_TYPE_EDGE_RISING;
-			bcm2835_gpio_irq_config(pc, offset, true);
-			pc->irq_type[offset] = type;
-		} else if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-			bcm2835_gpio_irq_config(pc, offset, true);
-		}
-		break;
-
-	case IRQ_TYPE_LEVEL_HIGH:
-	case IRQ_TYPE_LEVEL_LOW:
-		if (pc->irq_type[offset] != type) {
-			bcm2835_gpio_irq_config(pc, offset, false);
-			pc->irq_type[offset] = type;
-			bcm2835_gpio_irq_config(pc, offset, true);
-		}
-		break;
-
-	default:
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static int bcm2835_gpio_irq_set_type(struct irq_data *data, unsigned int type)
-{
-	struct bcm2835_pinctrl *pc = irq_data_get_irq_chip_data(data);
-	unsigned gpio = irqd_to_hwirq(data);
-	unsigned offset = GPIO_REG_SHIFT(gpio);
-	unsigned bank = GPIO_REG_OFFSET(gpio);
-	unsigned long flags;
-	int ret;
-
-	spin_lock_irqsave(&pc->irq_lock[bank], flags);
-
-	if (test_bit(offset, &pc->enabled_irq_map[bank]))
-		ret = __bcm2835_gpio_irq_set_type_enabled(pc, gpio, type);
-	else
-		ret = __bcm2835_gpio_irq_set_type_disabled(pc, gpio, type);
-
-	spin_unlock_irqrestore(&pc->irq_lock[bank], flags);
-
-	return ret;
-}
-
-static struct irq_chip bcm2835_gpio_irq_chip = {
-	.name = MODULE_NAME,
-	.irq_enable = bcm2835_gpio_irq_enable,
-	.irq_disable = bcm2835_gpio_irq_disable,
-	.irq_set_type = bcm2835_gpio_irq_set_type,
-};
-
-static int bcm2835_pctl_get_groups_count(struct pinctrl_dev *pctldev)
-{
-	return ARRAY_SIZE(bcm2835_gpio_groups);
-}
-
-static const char *bcm2835_pctl_get_group_name(struct pinctrl_dev *pctldev,
-		unsigned selector)
-{
-	return bcm2835_gpio_groups[selector];
-}
-
-static int bcm2835_pctl_get_group_pins(struct pinctrl_dev *pctldev,
-		unsigned selector,
-		const unsigned **pins,
-		unsigned *num_pins)
-{
-	*pins = &bcm2835_gpio_pins[selector].number;
-	*num_pins = 1;
-
-	return 0;
-}
-
-static void bcm2835_pctl_pin_dbg_show(struct pinctrl_dev *pctldev,
-		struct seq_file *s,
-		unsigned offset)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-	enum bcm2835_fsel fsel = bcm2835_pinctrl_fsel_get(pc, offset);
-	const char *fname = bcm2835_functions[fsel];
-	int value = bcm2835_gpio_get_bit(pc, GPLEV0, offset);
-	int irq = irq_find_mapping(pc->irq_domain, offset);
-
-	seq_printf(s, "function %s in %s; irq %d (%s)",
-		fname, value ? "hi" : "lo",
-		irq, irq_type_names[pc->irq_type[offset]]);
-}
-
-static void bcm2835_pctl_dt_free_map(struct pinctrl_dev *pctldev,
-		struct pinctrl_map *maps, unsigned num_maps)
-{
-	int i;
-
-	for (i = 0; i < num_maps; i++)
-		if (maps[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
-			kfree(maps[i].data.configs.configs);
-
-	kfree(maps);
-}
-
-static int bcm2835_pctl_dt_node_to_map_func(struct bcm2835_pinctrl *pc,
-		struct device_node *np, u32 pin, u32 fnum,
-		struct pinctrl_map **maps)
-{
-	struct pinctrl_map *map = *maps;
-
-	if (fnum >= ARRAY_SIZE(bcm2835_functions)) {
-		dev_err(pc->dev, "%s: invalid brcm,function %d\n",
-			of_node_full_name(np), fnum);
-		return -EINVAL;
-	}
-
-	map->type = PIN_MAP_TYPE_MUX_GROUP;
-	map->data.mux.group = bcm2835_gpio_groups[pin];
-	map->data.mux.function = bcm2835_functions[fnum];
-	(*maps)++;
-
-	return 0;
-}
-
-static int bcm2835_pctl_dt_node_to_map_pull(struct bcm2835_pinctrl *pc,
-		struct device_node *np, u32 pin, u32 pull,
-		struct pinctrl_map **maps)
-{
-	struct pinctrl_map *map = *maps;
-	unsigned long *configs;
-
-	if (pull > 2) {
-		dev_err(pc->dev, "%s: invalid brcm,pull %d\n",
-			of_node_full_name(np), pull);
-		return -EINVAL;
-	}
-
-	configs = kzalloc(sizeof(*configs), GFP_KERNEL);
-	if (!configs)
-		return -ENOMEM;
-	configs[0] = BCM2835_PINCONF_PACK(BCM2835_PINCONF_PARAM_PULL, pull);
-
-	map->type = PIN_MAP_TYPE_CONFIGS_PIN;
-	map->data.configs.group_or_pin = bcm2835_gpio_pins[pin].name;
-	map->data.configs.configs = configs;
-	map->data.configs.num_configs = 1;
-	(*maps)++;
-
-	return 0;
-}
-
-static int bcm2835_pctl_dt_node_to_map(struct pinctrl_dev *pctldev,
-		struct device_node *np,
-		struct pinctrl_map **map, unsigned *num_maps)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-	struct property *pins, *funcs, *pulls;
-	int num_pins, num_funcs, num_pulls, maps_per_pin;
-	struct pinctrl_map *maps, *cur_map;
-	int i, err;
-	u32 pin, func, pull;
-
-	pins = of_find_property(np, "brcm,pins", NULL);
-	if (!pins) {
-		dev_err(pc->dev, "%s: missing brcm,pins property\n",
-				of_node_full_name(np));
-		return -EINVAL;
-	}
-
-	funcs = of_find_property(np, "brcm,function", NULL);
-	pulls = of_find_property(np, "brcm,pull", NULL);
-
-	if (!funcs && !pulls) {
-		dev_err(pc->dev,
-			"%s: neither brcm,function nor brcm,pull specified\n",
-			of_node_full_name(np));
-		return -EINVAL;
-	}
-
-	num_pins = pins->length / 4;
-	num_funcs = funcs ? (funcs->length / 4) : 0;
-	num_pulls = pulls ? (pulls->length / 4) : 0;
-
-	if (num_funcs > 1 && num_funcs != num_pins) {
-		dev_err(pc->dev,
-			"%s: brcm,function must have 1 or %d entries\n",
-			of_node_full_name(np), num_pins);
-		return -EINVAL;
-	}
-
-	if (num_pulls > 1 && num_pulls != num_pins) {
-		dev_err(pc->dev,
-			"%s: brcm,pull must have 1 or %d entries\n",
-			of_node_full_name(np), num_pins);
-		return -EINVAL;
-	}
-
-	maps_per_pin = 0;
-	if (num_funcs)
-		maps_per_pin++;
-	if (num_pulls)
-		maps_per_pin++;
-	cur_map = maps = kzalloc(num_pins * maps_per_pin * sizeof(*maps),
-				GFP_KERNEL);
-	if (!maps)
-		return -ENOMEM;
-
-	for (i = 0; i < num_pins; i++) {
-		err = of_property_read_u32_index(np, "brcm,pins", i, &pin);
-		if (err)
-			goto out;
-		if (pin >= ARRAY_SIZE(bcm2835_gpio_pins)) {
-			dev_err(pc->dev, "%s: invalid brcm,pins value %d\n",
-				of_node_full_name(np), pin);
-			err = -EINVAL;
-			goto out;
-		}
-
-		if (num_funcs) {
-			err = of_property_read_u32_index(np, "brcm,function",
-					(num_funcs > 1) ? i : 0, &func);
-			if (err)
-				goto out;
-			err = bcm2835_pctl_dt_node_to_map_func(pc, np, pin,
-							func, &cur_map);
-			if (err)
-				goto out;
-		}
-		if (num_pulls) {
-			err = of_property_read_u32_index(np, "brcm,pull",
-					(num_funcs > 1) ? i : 0, &pull);
-			if (err)
-				goto out;
-			err = bcm2835_pctl_dt_node_to_map_pull(pc, np, pin,
-							pull, &cur_map);
-			if (err)
-				goto out;
-		}
-	}
-
-	*map = maps;
-	*num_maps = num_pins * maps_per_pin;
-
-	return 0;
-
-out:
-	kfree(maps);
-	return err;
-}
-
-static const struct pinctrl_ops bcm2835_pctl_ops = {
-	.get_groups_count = bcm2835_pctl_get_groups_count,
-	.get_group_name = bcm2835_pctl_get_group_name,
-	.get_group_pins = bcm2835_pctl_get_group_pins,
-	.pin_dbg_show = bcm2835_pctl_pin_dbg_show,
-	.dt_node_to_map = bcm2835_pctl_dt_node_to_map,
-	.dt_free_map = bcm2835_pctl_dt_free_map,
-};
-
-static int bcm2835_pmx_get_functions_count(struct pinctrl_dev *pctldev)
-{
-	return BCM2835_FSEL_COUNT;
-}
-
-static const char *bcm2835_pmx_get_function_name(struct pinctrl_dev *pctldev,
-		unsigned selector)
-{
-	return bcm2835_functions[selector];
-}
-
-static int bcm2835_pmx_get_function_groups(struct pinctrl_dev *pctldev,
-		unsigned selector,
-		const char * const **groups,
-		unsigned * const num_groups)
-{
-	/* every pin can do every function */
-	*groups = bcm2835_gpio_groups;
-	*num_groups = ARRAY_SIZE(bcm2835_gpio_groups);
-
-	return 0;
-}
-
-static int bcm2835_pmx_set(struct pinctrl_dev *pctldev,
-		unsigned func_selector,
-		unsigned group_selector)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-
-	bcm2835_pinctrl_fsel_set(pc, group_selector, func_selector);
-
-	return 0;
-}
-
-static void bcm2835_pmx_gpio_disable_free(struct pinctrl_dev *pctldev,
-		struct pinctrl_gpio_range *range,
-		unsigned offset)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-
-	/* disable by setting to GPIO_IN */
-	bcm2835_pinctrl_fsel_set(pc, offset, BCM2835_FSEL_GPIO_IN);
-}
-
-static int bcm2835_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
-		struct pinctrl_gpio_range *range,
-		unsigned offset,
-		bool input)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-	enum bcm2835_fsel fsel = input ?
-		BCM2835_FSEL_GPIO_IN : BCM2835_FSEL_GPIO_OUT;
-
-	bcm2835_pinctrl_fsel_set(pc, offset, fsel);
-
-	return 0;
-}
-
-static const struct pinmux_ops bcm2835_pmx_ops = {
-	.get_functions_count = bcm2835_pmx_get_functions_count,
-	.get_function_name = bcm2835_pmx_get_function_name,
-	.get_function_groups = bcm2835_pmx_get_function_groups,
-	.set_mux = bcm2835_pmx_set,
-	.gpio_disable_free = bcm2835_pmx_gpio_disable_free,
-	.gpio_set_direction = bcm2835_pmx_gpio_set_direction,
-};
-
-static int bcm2835_pinconf_get(struct pinctrl_dev *pctldev,
-			unsigned pin, unsigned long *config)
-{
-	/* No way to read back config in HW */
-	return -ENOTSUPP;
-}
-
-static int bcm2835_pinconf_set(struct pinctrl_dev *pctldev,
-			unsigned pin, unsigned long *configs,
-			unsigned num_configs)
-{
-	struct bcm2835_pinctrl *pc = pinctrl_dev_get_drvdata(pctldev);
-	enum bcm2835_pinconf_param param;
-	u16 arg;
-	u32 off, bit;
-	int i;
-
-	for (i = 0; i < num_configs; i++) {
-		param = BCM2835_PINCONF_UNPACK_PARAM(configs[i]);
-		arg = BCM2835_PINCONF_UNPACK_ARG(configs[i]);
-
-		if (param != BCM2835_PINCONF_PARAM_PULL)
-			return -EINVAL;
-
-		off = GPIO_REG_OFFSET(pin);
-		bit = GPIO_REG_SHIFT(pin);
-
-		bcm2835_gpio_wr(pc, GPPUD, arg & 3);
-		/*
-		 * Docs say to wait 150 cycles, but not of what. We assume a
-		 * 1 MHz clock here, which is pretty slow...
-		 */
-		udelay(150);
-		bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), BIT(bit));
-		udelay(150);
-		bcm2835_gpio_wr(pc, GPPUDCLK0 + (off * 4), 0);
-	} /* for each config */
-
-	return 0;
-}
-
-static const struct pinconf_ops bcm2835_pinconf_ops = {
-	.pin_config_get = bcm2835_pinconf_get,
-	.pin_config_set = bcm2835_pinconf_set,
-};
-
-static struct pinctrl_desc bcm2835_pinctrl_desc = {
-	.name = MODULE_NAME,
-	.pins = bcm2835_gpio_pins,
-	.npins = ARRAY_SIZE(bcm2835_gpio_pins),
-	.pctlops = &bcm2835_pctl_ops,
-	.pmxops = &bcm2835_pmx_ops,
-	.confops = &bcm2835_pinconf_ops,
-	.owner = THIS_MODULE,
-};
-
-static struct pinctrl_gpio_range bcm2835_pinctrl_gpio_range = {
-	.name = MODULE_NAME,
-	.npins = BCM2835_NUM_GPIOS,
-};
-
-static int bcm2835_pinctrl_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	struct bcm2835_pinctrl *pc;
-	struct resource iomem;
-	int err, i;
-	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_pins) != BCM2835_NUM_GPIOS);
-	BUILD_BUG_ON(ARRAY_SIZE(bcm2835_gpio_groups) != BCM2835_NUM_GPIOS);
-
-	pc = devm_kzalloc(dev, sizeof(*pc), GFP_KERNEL);
-	if (!pc)
-		return -ENOMEM;
-
-	platform_set_drvdata(pdev, pc);
-	pc->dev = dev;
-
-	err = of_address_to_resource(np, 0, &iomem);
-	if (err) {
-		dev_err(dev, "could not get IO memory\n");
-		return err;
-	}
-
-	pc->base = devm_ioremap_resource(dev, &iomem);
-	if (IS_ERR(pc->base))
-		return PTR_ERR(pc->base);
-
-	pc->gpio_chip = bcm2835_gpio_chip;
-	pc->gpio_chip.dev = dev;
-	pc->gpio_chip.of_node = np;
-
-	pc->irq_domain = irq_domain_add_linear(np, BCM2835_NUM_GPIOS,
-			&irq_domain_simple_ops, NULL);
-	if (!pc->irq_domain) {
-		dev_err(dev, "could not create IRQ domain\n");
-		return -ENOMEM;
-	}
-
-	for (i = 0; i < BCM2835_NUM_GPIOS; i++) {
-		int irq = irq_create_mapping(pc->irq_domain, i);
-		irq_set_lockdep_class(irq, &gpio_lock_class);
-		irq_set_chip_and_handler(irq, &bcm2835_gpio_irq_chip,
-				handle_simple_irq);
-		irq_set_chip_data(irq, pc);
-		set_irq_flags(irq, IRQF_VALID);
-	}
-
-	for (i = 0; i < BCM2835_NUM_BANKS; i++) {
-		unsigned long events;
-		unsigned offset;
-		int len;
-		char *name;
-
-		/* clear event detection flags */
-		bcm2835_gpio_wr(pc, GPREN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPFEN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPHEN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPLEN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPAREN0 + i * 4, 0);
-		bcm2835_gpio_wr(pc, GPAFEN0 + i * 4, 0);
-
-		/* clear all the events */
-		events = bcm2835_gpio_rd(pc, GPEDS0 + i * 4);
-		for_each_set_bit(offset, &events, 32)
-			bcm2835_gpio_wr(pc, GPEDS0 + i * 4, BIT(offset));
-
-		pc->irq[i] = irq_of_parse_and_map(np, i);
-		pc->irq_data[i].pc = pc;
-		pc->irq_data[i].bank = i;
-		spin_lock_init(&pc->irq_lock[i]);
-
-		len = strlen(dev_name(pc->dev)) + 16;
-		name = devm_kzalloc(pc->dev, len, GFP_KERNEL);
-		if (!name)
-			return -ENOMEM;
-		snprintf(name, len, "%s:bank%d", dev_name(pc->dev), i);
-
-		err = devm_request_irq(dev, pc->irq[i],
-			bcm2835_gpio_irq_handler, IRQF_SHARED,
-			name, &pc->irq_data[i]);
-		if (err) {
-			dev_err(dev, "unable to request IRQ %d\n", pc->irq[i]);
-			return err;
-		}
-	}
-
-	err = gpiochip_add(&pc->gpio_chip);
-	if (err) {
-		dev_err(dev, "could not add GPIO chip\n");
-		return err;
-	}
-
-	pc->pctl_dev = pinctrl_register(&bcm2835_pinctrl_desc, dev, pc);
-	if (!pc->pctl_dev) {
-		gpiochip_remove(&pc->gpio_chip);
-		return -EINVAL;
-	}
-
-	pc->gpio_range = bcm2835_pinctrl_gpio_range;
-	pc->gpio_range.base = pc->gpio_chip.base;
-	pc->gpio_range.gc = &pc->gpio_chip;
-	pinctrl_add_gpio_range(pc->pctl_dev, &pc->gpio_range);
-
-	return 0;
-}
-
-static int bcm2835_pinctrl_remove(struct platform_device *pdev)
-{
-	struct bcm2835_pinctrl *pc = platform_get_drvdata(pdev);
-
-	pinctrl_unregister(pc->pctl_dev);
-	gpiochip_remove(&pc->gpio_chip);
-
-	return 0;
-}
-
-static struct of_device_id bcm2835_pinctrl_match[] = {
-	{ .compatible = "brcm,bcm2835-gpio" },
-	{}
-};
-MODULE_DEVICE_TABLE(of, bcm2835_pinctrl_match);
-
-static struct platform_driver bcm2835_pinctrl_driver = {
-	.probe = bcm2835_pinctrl_probe,
-	.remove = bcm2835_pinctrl_remove,
-	.driver = {
-		.name = MODULE_NAME,
-		.of_match_table = bcm2835_pinctrl_match,
-	},
-};
-module_platform_driver(bcm2835_pinctrl_driver);
-
-MODULE_AUTHOR("Chris Boot, Simon Arlott, Stephen Warren");
-MODULE_DESCRIPTION("BCM2835 Pin control driver");
-MODULE_LICENSE("GPL");
-- 
1.7.9.5

Re: [PATCH v4 1/4] pinctrl: bcm: consolidate Broadcom pinctrl drivers

[Linus Walleij]

On Wed, Feb 4, 2015 at 3:09 AM, Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org> wrote:

> Consolidate Broadcom pinctrl drivers into drivers/pinctrl/bcm/*
>
> Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>

This patch doesn't apply so it needs to be rebased on v4.0-rc1 and resent.

And also when just moving files, always do this:

git format-patch -M ...

So that file movement is detected, and the patch will apply nicely even
if the contents of the file(s) have changed.

Can you also combine this series with the v9 GPIO etc series and
send out ONE big patch set that I can look at because right now I'm
getting really confused ...

I'll look over the rest and see if there is some remaining technical
comments (hopefully mainly patch mechanics remains).

Yours,
Linus Walleij
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Re: [PATCH v4 1/4] pinctrl: bcm: consolidate Broadcom pinctrl drivers

[Ray Jui]

Hi Linus,

On 3/4/2015 1:07 AM, Linus Walleij wrote:
> On Wed, Feb 4, 2015 at 3:09 AM, Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org> wrote:
> 
>> Consolidate Broadcom pinctrl drivers into drivers/pinctrl/bcm/*
>>
>> Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
> 
> This patch doesn't apply so it needs to be rebased on v4.0-rc1 and resent.
> 
> And also when just moving files, always do this:
> 
> git format-patch -M ...
> 
> So that file movement is detected, and the patch will apply nicely even
> if the contents of the file(s) have changed.
> 
> Can you also combine this series with the v9 GPIO etc series and
> send out ONE big patch set that I can look at because right now I'm
> getting really confused ...
> 
> I'll look over the rest and see if there is some remaining technical
> comments (hopefully mainly patch mechanics remains).
> 
> Yours,
> Linus Walleij
> 

Okay. I'll rebase to v4.0-rc1 and consolidate both pinmux and gpio
pinctrl patch series into one, which will be PATCH v5.

Thanks,

Ray
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[PATCH v4 2/4] pinctrl: Broadcom Cygnus pinctrl device tree binding

[Ray Jui]

Device tree binding documentation for Broadcom Cygnus IOMUX driver

Signed-off-by: Ray Jui <rjui-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
Reviewed-by: Scott Branden <sbranden-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
---
 .../bindings/pinctrl/brcm,cygnus-pinmux.txt        |  157 ++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt
new file mode 100644
index 0000000..985ad90
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-pinmux.txt
@@ -0,0 +1,157 @@
+Broadcom Cygnus IOMUX Controller
+
+The Cygnus IOMUX controller supports group based mux configuration. In
+addition, certain pins can be muxed to GPIO function individually.
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-pinmux"
+
+- reg:
+    Define the base and range of the I/O address space that contains the Cygnus
+IOMUX registers
+
+Required properties in child nodes:
+
+- function:
+    The mux function to select
+
+- groups:
+    The list of groups to select with a given function
+
+Each child node represents a configuration. Client devices reference the child
+node to enable a mux configuration
+
+For more details, refer to
+Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
+
+For example:
+
+	pinmux: pinmux@0x0301d0c8 {
+		compatible = "brcm,cygnus-pinmux";
+		reg = <0x0301d0c8 0x1b0>;
+
+		i2s_0: i2s_0 {
+			function = "i2s0";
+			groups = "i2s0_0_grp", "i2s0_1_grp";
+		};
+
+		i2s_1: i2s_1 {
+			function = "i2s1";
+			groups = "i2s1_0_grp", "i2s1_1_grp";
+		};
+
+		i2s_2: i2s_2 {
+			function = "i2s2";
+			groups = "i2s2_0_grp", "i2s2_1_grp", "i2s2_2_grp",
+				 "i2s2_3_grp", "i2s2_4_grp";
+		};
+
+		spi_0: spi_0 {
+			function = "spi0";
+			groups = "spi0_grp";
+		};
+	}
+
+	spi0@18028000 {
+			compatible = "arm,pl022", "arm,primecell";
+			reg = <0x18028000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
+			pinctrl-0 = <&spi_0>;
+			clocks = <&axi81_clk>;
+			clock-names = "apb_pclk";
+	};
+
+List of supported functions and groups in Cygnus:
+
+"i2s0": "i2s0_0_grp", "i2s0_1_grp"
+
+"i2s1": "i2s1_0_grp", "i2s1_1_grp"
+
+"i2s2": "i2s2_0_grp", "i2s2_1_grp", "i2s2_2_grp", "i2s2_3_grp", "i2s2_4_grp"
+
+"spdif": "spdif_grp"
+
+"pwm0": "pwm0_grp"
+
+"pwm1": "pwm1_grp"
+
+"pwm2": "pwm2_grp"
+
+"pwm3": "pwm3_grp"
+
+"pwm4": "pwm4_grp"
+
+"pwm5": "pwm5_grp"
+
+"key": "key0_grp", "key1_grp", "key2_grp", "key3_grp", "key4_grp", "key5_grp",
+"key6_grp", "key7_grp", "key8_grp", "key9_grp", "key10_grp", "key11_grp",
+"key12_grp", "key13_grp", "key14_grp", "key15_grp"
+
+"audio_dte": "audio_dte0_grp", "audio_dte1_grp", "audio_dte2_grp", "audio_dte3_grp"
+
+"smart_card0": "smart_card0_grp", "smart_card0_fcb_grp"
+
+"smart_card1": "smart_card1_grp", "smart_card1_fcb_grp"
+
+"spi0": "spi0_grp"
+
+"spi1": "spi1_grp"
+
+"spi2": "spi2_grp"
+
+"spi3": "spi3_grp"
+
+"spi4": "spi4_0_grp", "spi4_1_grp"
+
+"spi5": "spi5_grp"
+
+"sw_led0": "sw_led0_0_grp", "sw_led0_1_grp"
+
+"sw_led1": "sw_led1_grp"
+
+"sw_led2": "sw_led2_0_grp", "sw_led2_1_grp"
+
+"d1w": "d1w_grp"
+
+"lcd": "lcd_grp"
+
+"sram": "sram_0_grp", "sram_1_grp"
+
+"uart0": "uart0_grp"
+
+"uart1": "uart1_grp", "uart1_dte_grp"
+
+"uart2": "uart2_grp"
+
+"uart3": "uart3_grp"
+
+"uart4": "uart4_grp"
+
+"qspi": "qspi_0_grp", "qspi_1_grp"
+
+"nand": "nand_grp"
+
+"sdio0": "sdio0_grp", "sdio0_cd_grp", "sdio0_mmc_grp"
+
+"sdio1": "sdio1_data_0_grp", "sdio1_data_1_grp", "sdio1_cd_grp",
+"sdio1_led_grp", "sdio1_mmc_grp"
+
+"can0": "can0_grp"
+
+"can1": "can1_grp"
+
+"cam": "cam_led_grp", "cam_0_grp", "cam_1_grp"
+
+"bsc1": "bsc1_grp"
+
+"pcie_clkreq": "pcie_clkreq_grp"
+
+"usb0_oc": "usb0_oc_grp"
+
+"usb1_oc": "usb1_oc_grp"
+
+"usb2_oc": "usb2_oc_grp"
-- 
1.7.9.5

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[PATCH v4 3/4] pinctrl: cygnus: add initial IOMUX driver support

[Ray Jui]

This adds the initial driver support for the Broadcom Cygnus IOMUX
controller. The Cygnus IOMUX controller supports group based mux
configuration but allows certain pins to be muxed to GPIO individually

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/pinctrl/bcm/Kconfig              |   13 +
 drivers/pinctrl/bcm/Makefile             |    5 +-
 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c | 1088 ++++++++++++++++++++++++++++++
 3 files changed, 1104 insertions(+), 2 deletions(-)
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-mux.c

diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
index bc6d048..eb13201 100644
--- a/drivers/pinctrl/bcm/Kconfig
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -19,3 +19,16 @@ config PINCTRL_BCM2835
 	bool
 	select PINMUX
 	select PINCONF
+
+config PINCTRL_CYGNUS_MUX
+	bool "Broadcom Cygnus IOMUX driver"
+	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
+	select PINMUX
+	select GENERIC_PINCONF
+	default ARCH_BCM_CYGNUS
+	help
+	  Say yes here to enable the Broadcom Cygnus IOMUX driver.
+
+	  The Broadcom Cygnus IOMUX driver supports group based IOMUX
+	  configuration, with the exception that certain individual pins
+	  can be overrided to GPIO function
diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
index 7ba80a3..bb6beb6 100644
--- a/drivers/pinctrl/bcm/Makefile
+++ b/drivers/pinctrl/bcm/Makefile
@@ -1,4 +1,5 @@
 # Broadcom pinctrl support
 
-obj-$(CONFIG_PINCTRL_BCM281XX)	+= pinctrl-bcm281xx.o
-obj-$(CONFIG_PINCTRL_BCM2835)	+= pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
+obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
new file mode 100644
index 0000000..c4c4ed2
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-cygnus-mux.c
@@ -0,0 +1,1088 @@
+/* Copyright (C) 2014-2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file contains the Cygnus IOMUX driver that supports group based PINMUX
+ * configuration. Although PINMUX configuration is mainly group based, the
+ * Cygnus IOMUX controller allows certain pins to be individually muxed to GPIO
+ * function, and therefore be controlled by the Cygnus ASIU GPIO controller
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include "../core.h"
+#include "../pinctrl-utils.h"
+
+#define CYGNUS_NUM_IOMUX_REGS     8
+#define CYGNUS_NUM_MUX_PER_REG    8
+#define CYGNUS_NUM_IOMUX          (CYGNUS_NUM_IOMUX_REGS * \
+				   CYGNUS_NUM_MUX_PER_REG)
+
+/*
+ * Cygnus IOMUX register description
+ *
+ * @offset: register offset for mux configuration of a group
+ * @shift: bit shift for mux configuration of a group
+ * @alt: alternate function to set to
+ */
+struct cygnus_mux {
+	unsigned int offset;
+	unsigned int shift;
+	unsigned int alt;
+};
+
+/*
+ * Keep track of Cygnus IOMUX configuration and prevent double configuration
+ *
+ * @cygnus_mux: Cygnus IOMUX register description
+ * @is_configured: flag to indicate whether a mux setting has already been
+ * configured
+ */
+struct cygnus_mux_log {
+	struct cygnus_mux mux;
+	bool is_configured;
+};
+
+/*
+ * Group based IOMUX configuration
+ *
+ * @name: name of the group
+ * @pins: array of pins used by this group
+ * @num_pins: total number of pins used by this group
+ * @mux: Cygnus group based IOMUX configuration
+ */
+struct cygnus_pin_group {
+	const char *name;
+	const unsigned *pins;
+	unsigned num_pins;
+	struct cygnus_mux mux;
+};
+
+/*
+ * Cygnus mux function and supported pin groups
+ *
+ * @name: name of the function
+ * @groups: array of groups that can be supported by this function
+ * @num_groups: total number of groups that can be supported by this function
+ */
+struct cygnus_pin_function {
+	const char *name;
+	const char * const *groups;
+	unsigned num_groups;
+};
+
+/*
+ * Cygnus IOMUX pinctrl core
+ *
+ * @pctl: pointer to pinctrl_dev
+ * @dev: pointer to device
+ * @base0: first I/O register base of the Cygnus IOMUX controller
+ * @base1: second I/O register base
+ * @groups: pointer to array of groups
+ * @num_groups: total number of groups
+ * @functions: pointer to array of functions
+ * @num_functions: total number of functions
+ * @mux_log: pointer to the array of mux logs
+ * @lock: lock to protect register access
+ */
+struct cygnus_pinctrl {
+	struct pinctrl_dev *pctl;
+	struct device *dev;
+	void __iomem *base0;
+	void __iomem *base1;
+
+	const struct cygnus_pin_group *groups;
+	unsigned num_groups;
+
+	const struct cygnus_pin_function *functions;
+	unsigned num_functions;
+
+	struct cygnus_mux_log *mux_log;
+
+	spinlock_t lock;
+};
+
+/*
+ * Certain pins can be individually muxed to GPIO function
+ *
+ * @is_supported: flag to indicate GPIO mux is supported for this pin
+ * @offset: register offset for GPIO mux override of a pin
+ * @shift: bit shift for GPIO mux override of a pin
+ */
+struct cygnus_gpio_mux {
+	int is_supported;
+	unsigned int offset;
+	unsigned int shift;
+};
+
+/*
+ * Description of a pin in Cygnus
+ *
+ * @pin: pin number
+ * @name: pin name
+ * @gpio_mux: GPIO override related information
+ */
+struct cygnus_pin {
+	unsigned pin;
+	char *name;
+	struct cygnus_gpio_mux gpio_mux;
+};
+
+#define CYGNUS_PIN_DESC(p, n, i, o, s)	\
+{					\
+	.pin = p,			\
+	.name = n,			\
+	.gpio_mux = {			\
+		.is_supported = i,	\
+		.offset = o,		\
+		.shift = s,		\
+	},				\
+}
+
+/*
+ * List of pins in Cygnus
+ */
+static struct cygnus_pin cygnus_pins[] = {
+	CYGNUS_PIN_DESC(0, "ext_device_reset_n", 0, 0, 0),
+	CYGNUS_PIN_DESC(1, "chip_mode0", 0, 0, 0),
+	CYGNUS_PIN_DESC(2, "chip_mode1", 0, 0, 0),
+	CYGNUS_PIN_DESC(3, "chip_mode2", 0, 0, 0),
+	CYGNUS_PIN_DESC(4, "chip_mode3", 0, 0, 0),
+	CYGNUS_PIN_DESC(5, "chip_mode4", 0, 0, 0),
+	CYGNUS_PIN_DESC(6, "bsc0_scl", 0, 0, 0),
+	CYGNUS_PIN_DESC(7, "bsc0_sda", 0, 0, 0),
+	CYGNUS_PIN_DESC(8, "bsc1_scl", 0, 0, 0),
+	CYGNUS_PIN_DESC(9, "bsc1_sda", 0, 0, 0),
+	CYGNUS_PIN_DESC(10, "d1w_dq", 1, 0x28, 0),
+	CYGNUS_PIN_DESC(11, "d1wowstz_l", 1, 0x4, 28),
+	CYGNUS_PIN_DESC(12, "gpio0", 0, 0, 0),
+	CYGNUS_PIN_DESC(13, "gpio1", 0, 0, 0),
+	CYGNUS_PIN_DESC(14, "gpio2", 0, 0, 0),
+	CYGNUS_PIN_DESC(15, "gpio3", 0, 0, 0),
+	CYGNUS_PIN_DESC(16, "gpio4", 0, 0, 0),
+	CYGNUS_PIN_DESC(17, "gpio5", 0, 0, 0),
+	CYGNUS_PIN_DESC(18, "gpio6", 0, 0, 0),
+	CYGNUS_PIN_DESC(19, "gpio7", 0, 0, 0),
+	CYGNUS_PIN_DESC(20, "gpio8", 0, 0, 0),
+	CYGNUS_PIN_DESC(21, "gpio9", 0, 0, 0),
+	CYGNUS_PIN_DESC(22, "gpio10", 0, 0, 0),
+	CYGNUS_PIN_DESC(23, "gpio11", 0, 0, 0),
+	CYGNUS_PIN_DESC(24, "gpio12", 0, 0, 0),
+	CYGNUS_PIN_DESC(25, "gpio13", 0, 0, 0),
+	CYGNUS_PIN_DESC(26, "gpio14", 0, 0, 0),
+	CYGNUS_PIN_DESC(27, "gpio15", 0, 0, 0),
+	CYGNUS_PIN_DESC(28, "gpio16", 0, 0, 0),
+	CYGNUS_PIN_DESC(29, "gpio17", 0, 0, 0),
+	CYGNUS_PIN_DESC(30, "gpio18", 0, 0, 0),
+	CYGNUS_PIN_DESC(31, "gpio19", 0, 0, 0),
+	CYGNUS_PIN_DESC(32, "gpio20", 0, 0, 0),
+	CYGNUS_PIN_DESC(33, "gpio21", 0, 0, 0),
+	CYGNUS_PIN_DESC(34, "gpio22", 0, 0, 0),
+	CYGNUS_PIN_DESC(35, "gpio23", 0, 0, 0),
+	CYGNUS_PIN_DESC(36, "mdc", 0, 0, 0),
+	CYGNUS_PIN_DESC(37, "mdio", 0, 0, 0),
+	CYGNUS_PIN_DESC(38, "pwm0", 1, 0x10, 30),
+	CYGNUS_PIN_DESC(39, "pwm1", 1, 0x10, 28),
+	CYGNUS_PIN_DESC(40, "pwm2", 1, 0x10, 26),
+	CYGNUS_PIN_DESC(41, "pwm3", 1, 0x10, 24),
+	CYGNUS_PIN_DESC(42, "sc0_clk", 1, 0x10, 22),
+	CYGNUS_PIN_DESC(43, "sc0_cmdvcc_l", 1, 0x10, 20),
+	CYGNUS_PIN_DESC(44, "sc0_detect", 1, 0x10, 18),
+	CYGNUS_PIN_DESC(45, "sc0_fcb", 1, 0x10, 16),
+	CYGNUS_PIN_DESC(46, "sc0_io", 1, 0x10, 14),
+	CYGNUS_PIN_DESC(47, "sc0_rst_l", 1, 0x10, 12),
+	CYGNUS_PIN_DESC(48, "sc1_clk", 1, 0x10, 10),
+	CYGNUS_PIN_DESC(49, "sc1_cmdvcc_l", 1, 0x10, 8),
+	CYGNUS_PIN_DESC(50, "sc1_detect", 1, 0x10, 6),
+	CYGNUS_PIN_DESC(51, "sc1_fcb", 1, 0x10, 4),
+	CYGNUS_PIN_DESC(52, "sc1_io", 1, 0x10, 2),
+	CYGNUS_PIN_DESC(53, "sc1_rst_l", 1, 0x10, 0),
+	CYGNUS_PIN_DESC(54, "spi0_clk", 1, 0x18, 10),
+	CYGNUS_PIN_DESC(55, "spi0_mosi", 1, 0x18, 6),
+	CYGNUS_PIN_DESC(56, "spi0_miso", 1, 0x18, 8),
+	CYGNUS_PIN_DESC(57, "spi0_ss", 1, 0x18, 4),
+	CYGNUS_PIN_DESC(58, "spi1_clk", 1, 0x18, 2),
+	CYGNUS_PIN_DESC(59, "spi1_mosi", 1, 0x1c, 30),
+	CYGNUS_PIN_DESC(60, "spi1_miso", 1, 0x18, 0),
+	CYGNUS_PIN_DESC(61, "spi1_ss", 1, 0x1c, 28),
+	CYGNUS_PIN_DESC(62, "spi2_clk", 1, 0x1c, 26),
+	CYGNUS_PIN_DESC(63, "spi2_mosi", 1, 0x1c, 22),
+	CYGNUS_PIN_DESC(64, "spi2_miso", 1, 0x1c, 24),
+	CYGNUS_PIN_DESC(65, "spi2_ss", 1, 0x1c, 20),
+	CYGNUS_PIN_DESC(66, "spi3_clk", 1, 0x1c, 18),
+	CYGNUS_PIN_DESC(67, "spi3_mosi", 1, 0x1c, 14),
+	CYGNUS_PIN_DESC(68, "spi3_miso", 1, 0x1c, 16),
+	CYGNUS_PIN_DESC(69, "spi3_ss", 1, 0x1c, 12),
+	CYGNUS_PIN_DESC(70, "uart0_cts", 1, 0x1c, 10),
+	CYGNUS_PIN_DESC(71, "uart0_rts", 1, 0x1c, 8),
+	CYGNUS_PIN_DESC(72, "uart0_rx", 1, 0x1c, 6),
+	CYGNUS_PIN_DESC(73, "uart0_tx", 1, 0x1c, 4),
+	CYGNUS_PIN_DESC(74, "uart1_cts", 1, 0x1c, 2),
+	CYGNUS_PIN_DESC(75, "uart1_dcd", 1, 0x1c, 0),
+	CYGNUS_PIN_DESC(76, "uart1_dsr", 1, 0x20, 14),
+	CYGNUS_PIN_DESC(77, "uart1_dtr", 1, 0x20, 12),
+	CYGNUS_PIN_DESC(78, "uart1_ri", 1, 0x20, 10),
+	CYGNUS_PIN_DESC(79, "uart1_rts", 1, 0x20, 8),
+	CYGNUS_PIN_DESC(80, "uart1_rx", 1, 0x20, 6),
+	CYGNUS_PIN_DESC(81, "uart1_tx", 1, 0x20, 4),
+	CYGNUS_PIN_DESC(82, "uart3_rx", 1, 0x20, 2),
+	CYGNUS_PIN_DESC(83, "uart3_tx", 1, 0x20, 0),
+	CYGNUS_PIN_DESC(84, "sdio1_clk_sdcard", 1, 0x14, 6),
+	CYGNUS_PIN_DESC(85, "sdio1_cmd", 1, 0x14, 4),
+	CYGNUS_PIN_DESC(86, "sdio1_data0", 1, 0x14, 2),
+	CYGNUS_PIN_DESC(87, "sdio1_data1", 1, 0x14, 0),
+	CYGNUS_PIN_DESC(88, "sdio1_data2", 1, 0x18, 30),
+	CYGNUS_PIN_DESC(89, "sdio1_data3", 1, 0x18, 28),
+	CYGNUS_PIN_DESC(90, "sdio1_wp_n", 1, 0x18, 24),
+	CYGNUS_PIN_DESC(91, "sdio1_card_rst", 1, 0x14, 10),
+	CYGNUS_PIN_DESC(92, "sdio1_led_on", 1, 0x18, 26),
+	CYGNUS_PIN_DESC(93, "sdio1_cd", 1, 0x14, 8),
+	CYGNUS_PIN_DESC(94, "sdio0_clk_sdcard", 1, 0x14, 26),
+	CYGNUS_PIN_DESC(95, "sdio0_cmd", 1, 0x14, 24),
+	CYGNUS_PIN_DESC(96, "sdio0_data0", 1, 0x14, 22),
+	CYGNUS_PIN_DESC(97, "sdio0_data1", 1, 0x14, 20),
+	CYGNUS_PIN_DESC(98, "sdio0_data2", 1, 0x14, 18),
+	CYGNUS_PIN_DESC(99, "sdio0_data3", 1, 0x14, 16),
+	CYGNUS_PIN_DESC(100, "sdio0_wp_n", 1, 0x14, 12),
+	CYGNUS_PIN_DESC(101, "sdio0_card_rst", 1, 0x14, 30),
+	CYGNUS_PIN_DESC(102, "sdio0_led_on", 1, 0x14, 14),
+	CYGNUS_PIN_DESC(103, "sdio0_cd", 1, 0x14, 28),
+	CYGNUS_PIN_DESC(104, "sflash_clk", 1, 0x18, 22),
+	CYGNUS_PIN_DESC(105, "sflash_cs_l", 1, 0x18, 20),
+	CYGNUS_PIN_DESC(106, "sflash_mosi", 1, 0x18, 14),
+	CYGNUS_PIN_DESC(107, "sflash_miso", 1, 0x18, 16),
+	CYGNUS_PIN_DESC(108, "sflash_wp_n", 1, 0x18, 12),
+	CYGNUS_PIN_DESC(109, "sflash_hold_n", 1, 0x18, 18),
+	CYGNUS_PIN_DESC(110, "nand_ale", 1, 0xc, 30),
+	CYGNUS_PIN_DESC(111, "nand_ce0_l", 1, 0xc, 28),
+	CYGNUS_PIN_DESC(112, "nand_ce1_l", 1, 0xc, 26),
+	CYGNUS_PIN_DESC(113, "nand_cle", 1, 0xc, 24),
+	CYGNUS_PIN_DESC(114, "nand_dq0", 1, 0xc, 22),
+	CYGNUS_PIN_DESC(115, "nand_dq1", 1, 0xc, 20),
+	CYGNUS_PIN_DESC(116, "nand_dq2", 1, 0xc, 18),
+	CYGNUS_PIN_DESC(117, "nand_dq3", 1, 0xc, 16),
+	CYGNUS_PIN_DESC(118, "nand_dq4", 1, 0xc, 14),
+	CYGNUS_PIN_DESC(119, "nand_dq5", 1, 0xc, 12),
+	CYGNUS_PIN_DESC(120, "nand_dq6", 1, 0xc, 10),
+	CYGNUS_PIN_DESC(121, "nand_dq7", 1, 0xc, 8),
+	CYGNUS_PIN_DESC(122, "nand_rb_l", 1, 0xc, 6),
+	CYGNUS_PIN_DESC(123, "nand_re_l", 1, 0xc, 4),
+	CYGNUS_PIN_DESC(124, "nand_we_l", 1, 0xc, 2),
+	CYGNUS_PIN_DESC(125, "nand_wp_l", 1, 0xc, 0),
+	CYGNUS_PIN_DESC(126, "lcd_clac", 1, 0x4, 26),
+	CYGNUS_PIN_DESC(127, "lcd_clcp", 1, 0x4, 24),
+	CYGNUS_PIN_DESC(128, "lcd_cld0", 1, 0x4, 22),
+	CYGNUS_PIN_DESC(129, "lcd_cld1", 1, 0x4, 0),
+	CYGNUS_PIN_DESC(130, "lcd_cld10", 1, 0x4, 20),
+	CYGNUS_PIN_DESC(131, "lcd_cld11", 1, 0x4, 18),
+	CYGNUS_PIN_DESC(132, "lcd_cld12", 1, 0x4, 16),
+	CYGNUS_PIN_DESC(133, "lcd_cld13", 1, 0x4, 14),
+	CYGNUS_PIN_DESC(134, "lcd_cld14", 1, 0x4, 12),
+	CYGNUS_PIN_DESC(135, "lcd_cld15", 1, 0x4, 10),
+	CYGNUS_PIN_DESC(136, "lcd_cld16", 1, 0x4, 8),
+	CYGNUS_PIN_DESC(137, "lcd_cld17", 1, 0x4, 6),
+	CYGNUS_PIN_DESC(138, "lcd_cld18", 1, 0x4, 4),
+	CYGNUS_PIN_DESC(139, "lcd_cld19", 1, 0x4, 2),
+	CYGNUS_PIN_DESC(140, "lcd_cld2", 1, 0x8, 22),
+	CYGNUS_PIN_DESC(141, "lcd_cld20", 1, 0x8, 30),
+	CYGNUS_PIN_DESC(142, "lcd_cld21", 1, 0x8, 28),
+	CYGNUS_PIN_DESC(143, "lcd_cld22", 1, 0x8, 26),
+	CYGNUS_PIN_DESC(144, "lcd_cld23", 1, 0x8, 24),
+	CYGNUS_PIN_DESC(145, "lcd_cld3", 1, 0x8, 20),
+	CYGNUS_PIN_DESC(146, "lcd_cld4", 1, 0x8, 18),
+	CYGNUS_PIN_DESC(147, "lcd_cld5", 1, 0x8, 16),
+	CYGNUS_PIN_DESC(148, "lcd_cld6", 1, 0x8, 14),
+	CYGNUS_PIN_DESC(149, "lcd_cld7", 1, 0x8, 12),
+	CYGNUS_PIN_DESC(150, "lcd_cld8", 1, 0x8, 10),
+	CYGNUS_PIN_DESC(151, "lcd_cld9", 1, 0x8, 8),
+	CYGNUS_PIN_DESC(152, "lcd_clfp", 1, 0x8, 6),
+	CYGNUS_PIN_DESC(153, "lcd_clle", 1, 0x8, 4),
+	CYGNUS_PIN_DESC(154, "lcd_cllp", 1, 0x8, 2),
+	CYGNUS_PIN_DESC(155, "lcd_clpower", 1, 0x8, 0),
+	CYGNUS_PIN_DESC(156, "camera_vsync", 1, 0x4, 30),
+	CYGNUS_PIN_DESC(157, "camera_trigger", 1, 0x0, 0),
+	CYGNUS_PIN_DESC(158, "camera_strobe", 1, 0x0, 2),
+	CYGNUS_PIN_DESC(159, "camera_standby", 1, 0x0, 4),
+	CYGNUS_PIN_DESC(160, "camera_reset_n", 1, 0x0, 6),
+	CYGNUS_PIN_DESC(161, "camera_pixdata9", 1, 0x0, 8),
+	CYGNUS_PIN_DESC(162, "camera_pixdata8", 1, 0x0, 10),
+	CYGNUS_PIN_DESC(163, "camera_pixdata7", 1, 0x0, 12),
+	CYGNUS_PIN_DESC(164, "camera_pixdata6", 1, 0x0, 14),
+	CYGNUS_PIN_DESC(165, "camera_pixdata5", 1, 0x0, 16),
+	CYGNUS_PIN_DESC(166, "camera_pixdata4", 1, 0x0, 18),
+	CYGNUS_PIN_DESC(167, "camera_pixdata3", 1, 0x0, 20),
+	CYGNUS_PIN_DESC(168, "camera_pixdata2", 1, 0x0, 22),
+	CYGNUS_PIN_DESC(169, "camera_pixdata1", 1, 0x0, 24),
+	CYGNUS_PIN_DESC(170, "camera_pixdata0", 1, 0x0, 26),
+	CYGNUS_PIN_DESC(171, "camera_pixclk", 1, 0x0, 28),
+	CYGNUS_PIN_DESC(172, "camera_hsync", 1, 0x0, 30),
+	CYGNUS_PIN_DESC(173, "camera_pll_ref_clk", 0, 0, 0),
+	CYGNUS_PIN_DESC(174, "usb_id_indication", 0, 0, 0),
+	CYGNUS_PIN_DESC(175, "usb_vbus_indication", 0, 0, 0),
+	CYGNUS_PIN_DESC(176, "gpio0_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(177, "gpio1_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(178, "gpio2_3p3", 0, 0, 0),
+	CYGNUS_PIN_DESC(179, "gpio3_3p3", 0, 0, 0),
+};
+
+/*
+ * List of groups of pins
+ */
+static const unsigned bsc1_pins[] = { 8, 9 };
+static const unsigned pcie_clkreq_pins[] = { 8, 9 };
+
+static const unsigned i2s2_0_pins[] = { 12 };
+static const unsigned i2s2_1_pins[] = { 13 };
+static const unsigned i2s2_2_pins[] = { 14 };
+static const unsigned i2s2_3_pins[] = { 15 };
+static const unsigned i2s2_4_pins[] = { 16 };
+
+static const unsigned pwm4_pins[] = { 17 };
+static const unsigned pwm5_pins[] = { 18 };
+
+static const unsigned key0_pins[] = { 20 };
+static const unsigned key1_pins[] = { 21 };
+static const unsigned key2_pins[] = { 22 };
+static const unsigned key3_pins[] = { 23 };
+static const unsigned key4_pins[] = { 24 };
+static const unsigned key5_pins[] = { 25 };
+
+static const unsigned key6_pins[] = { 26 };
+static const unsigned audio_dte0_pins[] = { 26 };
+
+static const unsigned key7_pins[] = { 27 };
+static const unsigned audio_dte1_pins[] = { 27 };
+
+static const unsigned key8_pins[] = { 28 };
+static const unsigned key9_pins[] = { 29 };
+static const unsigned key10_pins[] = { 30 };
+static const unsigned key11_pins[] = { 31 };
+static const unsigned key12_pins[] = { 32 };
+static const unsigned key13_pins[] = { 33 };
+
+static const unsigned key14_pins[] = { 34 };
+static const unsigned audio_dte2_pins[] = { 34 };
+
+static const unsigned key15_pins[] = { 35 };
+static const unsigned audio_dte3_pins[] = { 35 };
+
+static const unsigned pwm0_pins[] = { 38 };
+static const unsigned pwm1_pins[] = { 39 };
+static const unsigned pwm2_pins[] = { 40 };
+static const unsigned pwm3_pins[] = { 41 };
+
+static const unsigned sdio0_pins[] = { 94, 95, 96, 97, 98, 99 };
+
+static const unsigned smart_card0_pins[] = { 42, 43, 44, 46, 47 };
+static const unsigned i2s0_0_pins[] = { 42, 43, 44, 46 };
+static const unsigned spdif_pins[] = { 47 };
+
+static const unsigned smart_card1_pins[] = { 48, 49, 50, 52, 53 };
+static const unsigned i2s1_0_pins[] = { 48, 49, 50, 52 };
+
+static const unsigned spi0_pins[] = { 54, 55, 56, 57 };
+
+static const unsigned spi1_pins[] = { 58, 59, 60, 61 };
+
+static const unsigned spi2_pins[] = { 62, 63, 64, 65 };
+
+static const unsigned spi3_pins[] = { 66, 67, 68, 69 };
+static const unsigned sw_led0_0_pins[] = { 66, 67, 68, 69 };
+
+static const unsigned d1w_pins[] = { 10, 11 };
+static const unsigned uart4_pins[] = { 10, 11 };
+static const unsigned sw_led2_0_pins[] = { 10, 11 };
+
+static const unsigned lcd_pins[] = { 126, 127, 128, 129, 130, 131, 132, 133,
+	134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
+	148, 149, 150, 151, 152, 153, 154, 155 };
+static const unsigned sram_0_pins[] = { 126, 127, 128, 129, 130, 131, 132, 133,
+	134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147,
+	148, 149, 150, 151, 152, 153, 154, 155 };
+static const unsigned spi5_pins[] = { 141, 142, 143, 144 };
+
+static const unsigned uart0_pins[] = { 70, 71, 72, 73 };
+static const unsigned sw_led0_1_pins[] = { 70, 71, 72, 73 };
+
+static const unsigned uart1_dte_pins[] = { 75, 76, 77, 78 };
+static const unsigned uart2_pins[] = { 75, 76, 77, 78 };
+
+static const unsigned uart1_pins[] = { 74, 79, 80, 81 };
+
+static const unsigned uart3_pins[] = { 82, 83 };
+
+static const unsigned qspi_0_pins[] = { 104, 105, 106, 107 };
+
+static const unsigned nand_pins[] = { 110, 111, 112, 113, 114, 115, 116, 117,
+	118, 119, 120, 121, 122, 123, 124, 125 };
+
+static const unsigned sdio0_cd_pins[] = { 103 };
+
+static const unsigned sdio0_mmc_pins[] = { 100, 101, 102 };
+
+static const unsigned sdio1_data_0_pins[] = { 86, 87 };
+static const unsigned can0_pins[] = { 86, 87 };
+static const unsigned spi4_0_pins[] = { 86, 87 };
+
+static const unsigned sdio1_data_1_pins[] = { 88, 89 };
+static const unsigned can1_pins[] = { 88, 89 };
+static const unsigned spi4_1_pins[] = { 88, 89 };
+
+static const unsigned sdio1_cd_pins[] = { 93 };
+
+static const unsigned sdio1_led_pins[] = { 84, 85 };
+static const unsigned sw_led2_1_pins[] = { 84, 85 };
+
+static const unsigned sdio1_mmc_pins[] = { 90, 91, 92 };
+
+static const unsigned cam_led_pins[] = { 156, 157, 158, 159, 160 };
+static const unsigned sw_led1_pins[] = { 156, 157, 158, 159 };
+
+static const unsigned cam_0_pins[] = { 169, 170, 171, 169, 170 };
+
+static const unsigned cam_1_pins[] = { 161, 162, 163, 164, 165, 166, 167,
+	168 };
+static const unsigned sram_1_pins[] = { 161, 162, 163, 164, 165, 166, 167,
+	168 };
+
+static const unsigned qspi_1_pins[] = { 108, 109 };
+
+static const unsigned smart_card0_fcb_pins[] = { 45 };
+static const unsigned i2s0_1_pins[] = { 45 };
+
+static const unsigned smart_card1_fcb_pins[] = { 51 };
+static const unsigned i2s1_1_pins[] = { 51 };
+
+static const unsigned gpio0_3p3_pins[] = { 176 };
+static const unsigned usb0_oc_pins[] = { 176 };
+
+static const unsigned gpio1_3p3_pins[] = { 177 };
+static const unsigned usb1_oc_pins[] = { 177 };
+
+static const unsigned gpio2_3p3_pins[] = { 178 };
+static const unsigned usb2_oc_pins[] = { 178 };
+
+#define CYGNUS_PIN_GROUP(group_name, off, sh, al)	\
+{							\
+	.name = __stringify(group_name) "_grp",		\
+	.pins = group_name ## _pins,			\
+	.num_pins = ARRAY_SIZE(group_name ## _pins),	\
+	.mux = {					\
+		.offset = off,				\
+		.shift = sh,				\
+		.alt = al,				\
+	}						\
+}
+
+/*
+ * List of Cygnus pin groups
+ */
+static const struct cygnus_pin_group cygnus_pin_groups[] = {
+	CYGNUS_PIN_GROUP(i2s2_0, 0x0, 0, 2),
+	CYGNUS_PIN_GROUP(i2s2_1, 0x0, 4, 2),
+	CYGNUS_PIN_GROUP(i2s2_2, 0x0, 8, 2),
+	CYGNUS_PIN_GROUP(i2s2_3, 0x0, 12, 2),
+	CYGNUS_PIN_GROUP(i2s2_4, 0x0, 16, 2),
+	CYGNUS_PIN_GROUP(pwm4, 0x0, 20, 0),
+	CYGNUS_PIN_GROUP(pwm5, 0x0, 24, 2),
+	CYGNUS_PIN_GROUP(key0, 0x4, 0, 1),
+	CYGNUS_PIN_GROUP(key1, 0x4, 4, 1),
+	CYGNUS_PIN_GROUP(key2, 0x4, 8, 1),
+	CYGNUS_PIN_GROUP(key3, 0x4, 12, 1),
+	CYGNUS_PIN_GROUP(key4, 0x4, 16, 1),
+	CYGNUS_PIN_GROUP(key5, 0x4, 20, 1),
+	CYGNUS_PIN_GROUP(key6, 0x4, 24, 1),
+	CYGNUS_PIN_GROUP(audio_dte0, 0x4, 24, 2),
+	CYGNUS_PIN_GROUP(key7, 0x4, 28, 1),
+	CYGNUS_PIN_GROUP(audio_dte1, 0x4, 28, 2),
+	CYGNUS_PIN_GROUP(key8, 0x8, 0, 1),
+	CYGNUS_PIN_GROUP(key9, 0x8, 4, 1),
+	CYGNUS_PIN_GROUP(key10, 0x8, 8, 1),
+	CYGNUS_PIN_GROUP(key11, 0x8, 12, 1),
+	CYGNUS_PIN_GROUP(key12, 0x8, 16, 1),
+	CYGNUS_PIN_GROUP(key13, 0x8, 20, 1),
+	CYGNUS_PIN_GROUP(key14, 0x8, 24, 1),
+	CYGNUS_PIN_GROUP(audio_dte2, 0x8, 24, 2),
+	CYGNUS_PIN_GROUP(key15, 0x8, 28, 1),
+	CYGNUS_PIN_GROUP(audio_dte3, 0x8, 28, 2),
+	CYGNUS_PIN_GROUP(pwm0, 0xc, 0, 0),
+	CYGNUS_PIN_GROUP(pwm1, 0xc, 4, 0),
+	CYGNUS_PIN_GROUP(pwm2, 0xc, 8, 0),
+	CYGNUS_PIN_GROUP(pwm3, 0xc, 12, 0),
+	CYGNUS_PIN_GROUP(sdio0, 0xc, 16, 0),
+	CYGNUS_PIN_GROUP(smart_card0, 0xc, 20, 0),
+	CYGNUS_PIN_GROUP(i2s0_0, 0xc, 20, 1),
+	CYGNUS_PIN_GROUP(spdif, 0xc, 20, 1),
+	CYGNUS_PIN_GROUP(smart_card1, 0xc, 24, 0),
+	CYGNUS_PIN_GROUP(i2s1_0, 0xc, 24, 1),
+	CYGNUS_PIN_GROUP(spi0, 0x10, 0, 0),
+	CYGNUS_PIN_GROUP(spi1, 0x10, 4, 0),
+	CYGNUS_PIN_GROUP(spi2, 0x10, 8, 0),
+	CYGNUS_PIN_GROUP(spi3, 0x10, 12, 0),
+	CYGNUS_PIN_GROUP(sw_led0_0, 0x10, 12, 2),
+	CYGNUS_PIN_GROUP(d1w, 0x10, 16, 0),
+	CYGNUS_PIN_GROUP(uart4, 0x10, 16, 1),
+	CYGNUS_PIN_GROUP(sw_led2_0, 0x10, 16, 2),
+	CYGNUS_PIN_GROUP(lcd, 0x10, 20, 0),
+	CYGNUS_PIN_GROUP(sram_0, 0x10, 20, 1),
+	CYGNUS_PIN_GROUP(spi5, 0x10, 20, 2),
+	CYGNUS_PIN_GROUP(uart0, 0x14, 0, 0),
+	CYGNUS_PIN_GROUP(sw_led0_1, 0x14, 0, 2),
+	CYGNUS_PIN_GROUP(uart1_dte, 0x14, 4, 0),
+	CYGNUS_PIN_GROUP(uart2, 0x14, 4, 1),
+	CYGNUS_PIN_GROUP(uart1, 0x14, 8, 0),
+	CYGNUS_PIN_GROUP(uart3, 0x14, 12, 0),
+	CYGNUS_PIN_GROUP(qspi_0, 0x14, 16, 0),
+	CYGNUS_PIN_GROUP(nand, 0x14, 20, 0),
+	CYGNUS_PIN_GROUP(sdio0_cd, 0x18, 0, 0),
+	CYGNUS_PIN_GROUP(sdio0_mmc, 0x18, 4, 0),
+	CYGNUS_PIN_GROUP(sdio1_data_0, 0x18, 8, 0),
+	CYGNUS_PIN_GROUP(can0, 0x18, 8, 1),
+	CYGNUS_PIN_GROUP(spi4_0, 0x18, 8, 2),
+	CYGNUS_PIN_GROUP(sdio1_data_1, 0x18, 12, 0),
+	CYGNUS_PIN_GROUP(can1, 0x18, 12, 1),
+	CYGNUS_PIN_GROUP(spi4_1, 0x18, 12, 2),
+	CYGNUS_PIN_GROUP(sdio1_cd, 0x18, 16, 0),
+	CYGNUS_PIN_GROUP(sdio1_led, 0x18, 20, 0),
+	CYGNUS_PIN_GROUP(sw_led2_1, 0x18, 20, 2),
+	CYGNUS_PIN_GROUP(sdio1_mmc, 0x18, 24, 0),
+	CYGNUS_PIN_GROUP(cam_led, 0x1c, 0, 0),
+	CYGNUS_PIN_GROUP(sw_led1, 0x1c, 0, 1),
+	CYGNUS_PIN_GROUP(cam_0, 0x1c, 4, 0),
+	CYGNUS_PIN_GROUP(cam_1, 0x1c, 8, 0),
+	CYGNUS_PIN_GROUP(sram_1, 0x1c, 8, 1),
+	CYGNUS_PIN_GROUP(qspi_1, 0x1c, 12, 0),
+	CYGNUS_PIN_GROUP(bsc1, 0x1c, 16, 0),
+	CYGNUS_PIN_GROUP(pcie_clkreq, 0x1c, 16, 1),
+	CYGNUS_PIN_GROUP(smart_card0_fcb, 0x20, 0, 0),
+	CYGNUS_PIN_GROUP(i2s0_1, 0x20, 0, 1),
+	CYGNUS_PIN_GROUP(smart_card1_fcb, 0x20, 4, 0),
+	CYGNUS_PIN_GROUP(i2s1_1, 0x20, 4, 1),
+	CYGNUS_PIN_GROUP(gpio0_3p3, 0x28, 0, 0),
+	CYGNUS_PIN_GROUP(usb0_oc, 0x28, 0, 1),
+	CYGNUS_PIN_GROUP(gpio1_3p3, 0x28, 4, 0),
+	CYGNUS_PIN_GROUP(usb1_oc, 0x28, 4, 1),
+	CYGNUS_PIN_GROUP(gpio2_3p3, 0x28, 8, 0),
+	CYGNUS_PIN_GROUP(usb2_oc, 0x28, 8, 1),
+};
+
+/*
+ * List of groups supported by functions
+ */
+static const char * const i2s0_grps[] = { "i2s0_0_grp", "i2s0_1_grp" };
+static const char * const i2s1_grps[] = { "i2s1_0_grp", "i2s1_1_grp" };
+static const char * const i2s2_grps[] = { "i2s2_0_grp", "i2s2_1_grp",
+	"i2s2_2_grp", "i2s2_3_grp", "i2s2_4_grp" };
+static const char * const spdif_grps[] = { "spdif_grp" };
+static const char * const pwm0_grps[] = { "pwm0_grp" };
+static const char * const pwm1_grps[] = { "pwm1_grp" };
+static const char * const pwm2_grps[] = { "pwm2_grp" };
+static const char * const pwm3_grps[] = { "pwm3_grp" };
+static const char * const pwm4_grps[] = { "pwm4_grp" };
+static const char * const pwm5_grps[] = { "pwm5_grp" };
+static const char * const key_grps[] = { "key0_grp", "key1_grp", "key2_grp",
+	"key3_grp", "key4_grp", "key5_grp", "key6_grp", "key7_grp", "key8_grp",
+	"key9_grp", "key10_grp", "key11_grp", "key12_grp", "key13_grp",
+	"key14_grp", "key15_grp" };
+static const char * const audio_dte_grps[] = { "audio_dte0_grp",
+	"audio_dte1_grp", "audio_dte2_grp", "audio_dte3_grp" };
+static const char * const smart_card0_grps[] = { "smart_card0_grp",
+	"smart_card0_fcb_grp" };
+static const char * const smart_card1_grps[] = { "smart_card1_grp",
+	"smart_card1_fcb_grp" };
+static const char * const spi0_grps[] = { "spi0_grp" };
+static const char * const spi1_grps[] = { "spi1_grp" };
+static const char * const spi2_grps[] = { "spi2_grp" };
+static const char * const spi3_grps[] = { "spi3_grp" };
+static const char * const spi4_grps[] = { "spi4_0_grp", "spi4_1_grp" };
+static const char * const spi5_grps[] = { "spi5_grp" };
+
+static const char * const sw_led0_grps[] = { "sw_led0_0_grp",
+	"sw_led0_1_grp" };
+static const char * const sw_led1_grps[] = { "sw_led1_grp" };
+static const char * const sw_led2_grps[] = { "sw_led2_0_grp",
+	"sw_led2_1_grp" };
+static const char * const d1w_grps[] = { "d1w_grp" };
+static const char * const lcd_grps[] = { "lcd_grp" };
+static const char * const sram_grps[] = { "sram_0_grp", "sram_1_grp" };
+
+static const char * const uart0_grps[] = { "uart0_grp" };
+static const char * const uart1_grps[] = { "uart1_grp", "uart1_dte_grp" };
+static const char * const uart2_grps[] = { "uart2_grp" };
+static const char * const uart3_grps[] = { "uart3_grp" };
+static const char * const uart4_grps[] = { "uart4_grp" };
+static const char * const qspi_grps[] = { "qspi_0_grp", "qspi_1_grp" };
+static const char * const nand_grps[] = { "nand_grp" };
+static const char * const sdio0_grps[] = { "sdio0_grp", "sdio0_cd_grp",
+	"sdio0_mmc_grp" };
+static const char * const sdio1_grps[] = { "sdio1_data_0_grp",
+	"sdio1_data_1_grp", "sdio1_cd_grp", "sdio1_led_grp", "sdio1_mmc_grp" };
+static const char * const can0_grps[] = { "can0_grp" };
+static const char * const can1_grps[] = { "can1_grp" };
+static const char * const cam_grps[] = { "cam_led_grp", "cam_0_grp",
+	"cam_1_grp" };
+static const char * const bsc1_grps[] = { "bsc1_grp" };
+static const char * const pcie_clkreq_grps[] = { "pcie_clkreq_grp" };
+static const char * const usb0_oc_grps[] = { "usb0_oc_grp" };
+static const char * const usb1_oc_grps[] = { "usb1_oc_grp" };
+static const char * const usb2_oc_grps[] = { "usb2_oc_grp" };
+
+#define CYGNUS_PIN_FUNCTION(func)				\
+{								\
+	.name = #func,						\
+	.groups = func ## _grps,				\
+	.num_groups = ARRAY_SIZE(func ## _grps),		\
+}
+
+/*
+ * List of supported functions in Cygnus
+ */
+static const struct cygnus_pin_function cygnus_pin_functions[] = {
+	CYGNUS_PIN_FUNCTION(i2s0),
+	CYGNUS_PIN_FUNCTION(i2s1),
+	CYGNUS_PIN_FUNCTION(i2s2),
+	CYGNUS_PIN_FUNCTION(spdif),
+	CYGNUS_PIN_FUNCTION(pwm0),
+	CYGNUS_PIN_FUNCTION(pwm1),
+	CYGNUS_PIN_FUNCTION(pwm2),
+	CYGNUS_PIN_FUNCTION(pwm3),
+	CYGNUS_PIN_FUNCTION(pwm4),
+	CYGNUS_PIN_FUNCTION(pwm5),
+	CYGNUS_PIN_FUNCTION(key),
+	CYGNUS_PIN_FUNCTION(audio_dte),
+	CYGNUS_PIN_FUNCTION(smart_card0),
+	CYGNUS_PIN_FUNCTION(smart_card1),
+	CYGNUS_PIN_FUNCTION(spi0),
+	CYGNUS_PIN_FUNCTION(spi1),
+	CYGNUS_PIN_FUNCTION(spi2),
+	CYGNUS_PIN_FUNCTION(spi3),
+	CYGNUS_PIN_FUNCTION(spi4),
+	CYGNUS_PIN_FUNCTION(spi5),
+	CYGNUS_PIN_FUNCTION(sw_led0),
+	CYGNUS_PIN_FUNCTION(sw_led1),
+	CYGNUS_PIN_FUNCTION(sw_led2),
+	CYGNUS_PIN_FUNCTION(d1w),
+	CYGNUS_PIN_FUNCTION(lcd),
+	CYGNUS_PIN_FUNCTION(sram),
+	CYGNUS_PIN_FUNCTION(uart0),
+	CYGNUS_PIN_FUNCTION(uart1),
+	CYGNUS_PIN_FUNCTION(uart2),
+	CYGNUS_PIN_FUNCTION(uart3),
+	CYGNUS_PIN_FUNCTION(uart4),
+	CYGNUS_PIN_FUNCTION(qspi),
+	CYGNUS_PIN_FUNCTION(nand),
+	CYGNUS_PIN_FUNCTION(sdio0),
+	CYGNUS_PIN_FUNCTION(sdio1),
+	CYGNUS_PIN_FUNCTION(can0),
+	CYGNUS_PIN_FUNCTION(can1),
+	CYGNUS_PIN_FUNCTION(cam),
+	CYGNUS_PIN_FUNCTION(bsc1),
+	CYGNUS_PIN_FUNCTION(pcie_clkreq),
+	CYGNUS_PIN_FUNCTION(usb0_oc),
+	CYGNUS_PIN_FUNCTION(usb1_oc),
+	CYGNUS_PIN_FUNCTION(usb2_oc),
+};
+
+static int cygnus_get_groups_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_groups;
+}
+
+static const char *cygnus_get_group_name(struct pinctrl_dev *pctrl_dev,
+					 unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->groups[selector].name;
+}
+
+static int cygnus_get_group_pins(struct pinctrl_dev *pctrl_dev,
+				 unsigned selector, const unsigned **pins,
+				 unsigned *num_pins)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*pins = pinctrl->groups[selector].pins;
+	*num_pins = pinctrl->groups[selector].num_pins;
+
+	return 0;
+}
+
+static void cygnus_pin_dbg_show(struct pinctrl_dev *pctrl_dev,
+				struct seq_file *s, unsigned offset)
+{
+	seq_printf(s, " %s", dev_name(pctrl_dev->dev));
+}
+
+static bool cygnus_function_is_valid(const char *function_name)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(cygnus_pin_functions); i++) {
+		if (!strcmp(cygnus_pin_functions[i].name, function_name))
+			return true;
+	}
+
+	return false;
+}
+
+/*
+ * TODO: Use API from pinctrl framework once "groups" parsing is supported
+ */
+static int cygnus_dt_node_to_map(struct pinctrl_dev *pctrl_dev,
+				 struct device_node *np,
+				 struct pinctrl_map **map,
+				 unsigned *num_maps)
+{
+	int ret, num_groups;
+	unsigned reserved_maps = 0;
+	struct property *prop;
+	const char *group_name, *function_name;
+
+	*map = NULL;
+	*num_maps = 0;
+
+	num_groups = of_property_count_strings(np, "groups");
+	if (num_groups < 0) {
+		dev_err(pctrl_dev->dev, "could not parse property groups\n");
+		return -EINVAL;
+	}
+
+	ret = of_property_read_string(np, "function", &function_name);
+	if (ret < 0) {
+		dev_err(pctrl_dev->dev,	"could not parse property function\n");
+		return -EINVAL;
+	}
+
+	/* check if it's a valid function */
+	if (!cygnus_function_is_valid(function_name)) {
+		dev_warn(pctrl_dev->dev, "invalid function name: %s\n",
+				function_name);
+	}
+
+	ret = pinctrl_utils_reserve_map(pctrl_dev, map, &reserved_maps,
+			num_maps, num_groups);
+	if (ret) {
+		dev_err(pctrl_dev->dev, "unable to reserve map\n");
+		return ret;
+	}
+
+	of_property_for_each_string(np, "groups", prop, group_name) {
+		ret = pinctrl_utils_add_map_mux(pctrl_dev, map,
+				&reserved_maps, num_maps, group_name,
+				function_name);
+		if (ret) {
+			dev_err(pctrl_dev->dev, "can't add map: %d\n", ret);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static const struct pinctrl_ops cygnus_pinctrl_ops = {
+	.get_groups_count = cygnus_get_groups_count,
+	.get_group_name = cygnus_get_group_name,
+	.get_group_pins = cygnus_get_group_pins,
+	.pin_dbg_show = cygnus_pin_dbg_show,
+	.dt_node_to_map = cygnus_dt_node_to_map,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int cygnus_get_functions_count(struct pinctrl_dev *pctrl_dev)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->num_functions;
+}
+
+static const char *cygnus_get_function_name(struct pinctrl_dev *pctrl_dev,
+					    unsigned selector)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	return pinctrl->functions[selector].name;
+}
+
+static int cygnus_get_function_groups(struct pinctrl_dev *pctrl_dev,
+				      unsigned selector,
+				      const char * const **groups,
+				      unsigned * const num_groups)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+
+	*groups = pinctrl->functions[selector].groups;
+	*num_groups = pinctrl->functions[selector].num_groups;
+
+	return 0;
+}
+
+static int cygnus_pinmux_set(struct cygnus_pinctrl *pinctrl,
+			     const struct cygnus_pin_function *func,
+			     const struct cygnus_pin_group *grp,
+			     struct cygnus_mux_log *mux_log)
+{
+	const struct cygnus_mux *mux = &grp->mux;
+	int i;
+	u32 val, mask = 0x7;
+	unsigned long flags;
+
+	for (i = 0; i < CYGNUS_NUM_IOMUX; i++) {
+		if (mux->offset != mux_log[i].mux.offset ||
+		    mux->shift != mux_log[i].mux.shift)
+			continue;
+
+		/* match found if we reach here */
+
+		/* if this is a new configuration, just do it! */
+		if (!mux_log[i].is_configured)
+			break;
+
+		/*
+		 * IOMUX has been configured previously and one is trying to
+		 * configure it to a different function
+		 */
+		if (mux_log[i].mux.alt != mux->alt) {
+			dev_err(pinctrl->dev,
+				"double configuration error detected!\n");
+			dev_err(pinctrl->dev, "func:%s grp:%s\n",
+				func->name, grp->name);
+			return -EINVAL;
+		} else {
+			/*
+			 * One tries to configure it to the same function.
+			 * Just quit and don't bother
+			 */
+			return 0;
+		}
+	}
+
+	mux_log[i].mux.alt = mux->alt;
+	mux_log[i].is_configured = true;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base0 + grp->mux.offset);
+	val &= ~(mask << grp->mux.shift);
+	val |= grp->mux.alt << grp->mux.shift;
+	writel(val, pinctrl->base0 + grp->mux.offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	return 0;
+}
+
+static int cygnus_pinmux_set_mux(struct pinctrl_dev *pctrl_dev,
+				 unsigned func_select, unsigned grp_select)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	const struct cygnus_pin_function *func =
+		&pinctrl->functions[func_select];
+	const struct cygnus_pin_group *grp = &pinctrl->groups[grp_select];
+
+	dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
+		func_select, func->name, grp_select, grp->name);
+
+	dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n",
+		grp->mux.offset, grp->mux.shift, grp->mux.alt);
+
+	return cygnus_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
+}
+
+static int cygnus_gpio_request_enable(struct pinctrl_dev *pctrl_dev,
+				      struct pinctrl_gpio_range *range,
+				      unsigned pin)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	const struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
+	u32 val;
+	unsigned long flags;
+
+	/* not all pins support GPIO pinmux override */
+	if (!mux->is_supported)
+		return -ENOTSUPP;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base1 + mux->offset);
+	val |= 0x3 << mux->shift;
+	writel(val, pinctrl->base1 + mux->offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	dev_dbg(pctrl_dev->dev,
+		"gpio request enable pin=%u offset=0x%x shift=%u\n",
+		pin, mux->offset, mux->shift);
+
+	return 0;
+}
+
+static void cygnus_gpio_disable_free(struct pinctrl_dev *pctrl_dev,
+				     struct pinctrl_gpio_range *range,
+				     unsigned pin)
+{
+	struct cygnus_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
+	struct cygnus_gpio_mux *mux = pctrl_dev->desc->pins[pin].drv_data;
+	u32 val;
+	unsigned long flags;
+
+	if (!mux->is_supported)
+		return;
+
+	spin_lock_irqsave(&pinctrl->lock, flags);
+
+	val = readl(pinctrl->base1 + mux->offset);
+	val &= ~(0x3 << mux->shift);
+	writel(val, pinctrl->base1 + mux->offset);
+
+	spin_unlock_irqrestore(&pinctrl->lock, flags);
+
+	dev_err(pctrl_dev->dev,
+		"gpio disable free pin=%u offset=0x%x shift=%u\n",
+		pin, mux->offset, mux->shift);
+}
+
+static const struct pinmux_ops cygnus_pinmux_ops = {
+	.get_functions_count = cygnus_get_functions_count,
+	.get_function_name = cygnus_get_function_name,
+	.get_function_groups = cygnus_get_function_groups,
+	.set_mux = cygnus_pinmux_set_mux,
+	.gpio_request_enable = cygnus_gpio_request_enable,
+	.gpio_disable_free = cygnus_gpio_disable_free,
+};
+
+static struct pinctrl_desc cygnus_pinctrl_desc = {
+	.name = "cygnus-pinmux",
+	.pctlops = &cygnus_pinctrl_ops,
+	.pmxops = &cygnus_pinmux_ops,
+};
+
+static int cygnus_mux_log_init(struct cygnus_pinctrl *pinctrl)
+{
+	struct cygnus_mux_log *log;
+	unsigned int i, j;
+
+	pinctrl->mux_log = devm_kcalloc(pinctrl->dev, CYGNUS_NUM_IOMUX,
+					sizeof(struct cygnus_mux_log),
+					GFP_KERNEL);
+	if (!pinctrl->mux_log)
+		return -ENOMEM;
+
+	log = pinctrl->mux_log;
+	for (i = 0; i < CYGNUS_NUM_IOMUX_REGS; i++) {
+		for (j = 0; j < CYGNUS_NUM_MUX_PER_REG; j++) {
+			log = &pinctrl->mux_log[i * CYGNUS_NUM_MUX_PER_REG
+				+ j];
+			log->mux.offset = i * 4;
+			log->mux.shift = j * 4;
+			log->mux.alt = 0;
+			log->is_configured = false;
+		}
+	}
+
+	return 0;
+}
+
+static int cygnus_pinmux_probe(struct platform_device *pdev)
+{
+	struct cygnus_pinctrl *pinctrl;
+	struct resource *res;
+	int i, ret;
+	struct pinctrl_pin_desc *pins;
+	unsigned num_pins = ARRAY_SIZE(cygnus_pins);
+
+	pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
+	if (!pinctrl)
+		return -ENOMEM;
+
+	pinctrl->dev = &pdev->dev;
+	platform_set_drvdata(pdev, pinctrl);
+	spin_lock_init(&pinctrl->lock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pinctrl->base0)) {
+		dev_err(&pdev->dev, "unable to map I/O space\n");
+		return PTR_ERR(pinctrl->base0);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	pinctrl->base1 = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(pinctrl->base1)) {
+		dev_err(&pdev->dev, "unable to map I/O space\n");
+		return PTR_ERR(pinctrl->base1);
+	}
+
+	ret = cygnus_mux_log_init(pinctrl);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
+		return ret;
+	}
+
+	pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
+	if (!pins)
+		return -ENOMEM;
+
+	for (i = 0; i < num_pins; i++) {
+		pins[i].number = cygnus_pins[i].pin;
+		pins[i].name = cygnus_pins[i].name;
+		pins[i].drv_data = &cygnus_pins[i].gpio_mux;
+	}
+
+	pinctrl->groups = cygnus_pin_groups;
+	pinctrl->num_groups = ARRAY_SIZE(cygnus_pin_groups);
+	pinctrl->functions = cygnus_pin_functions;
+	pinctrl->num_functions = ARRAY_SIZE(cygnus_pin_functions);
+	cygnus_pinctrl_desc.pins = pins;
+	cygnus_pinctrl_desc.npins = num_pins;
+
+	pinctrl->pctl = pinctrl_register(&cygnus_pinctrl_desc, &pdev->dev,
+			pinctrl);
+	if (!pinctrl->pctl) {
+		dev_err(&pdev->dev, "unable to register Cygnus IOMUX pinctrl\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct of_device_id cygnus_pinmux_of_match[] = {
+	{ .compatible = "brcm,cygnus-pinmux" },
+	{ }
+};
+
+static struct platform_driver cygnus_pinmux_driver = {
+	.driver = {
+		.name = "cygnus-pinmux",
+		.of_match_table = cygnus_pinmux_of_match,
+		.suppress_bind_attrs = true,
+	},
+	.probe = cygnus_pinmux_probe,
+};
+
+static int __init cygnus_pinmux_init(void)
+{
+	return platform_driver_register(&cygnus_pinmux_driver);
+}
+arch_initcall(cygnus_pinmux_init);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus IOMUX driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

[PATCH v4 4/4] ARM: dts: enable IOMUX for Broadcom Cygnus

[Ray Jui]

This enables the IOMUX support for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index 5126f9e..b014ce5 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -54,6 +54,12 @@
 
 	/include/ "bcm-cygnus-clock.dtsi"
 
+	pinctrl: pinctrl@0x0301d0c8 {
+		compatible = "brcm,cygnus-pinmux";
+		reg = <0x0301d0c8 0x30>,
+		      <0x0301d24c 0x2c>;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

Re: [PATCH v4 0/4] Add pinctrl support to Broadcom Cygnus SoC

[Dmitry Torokhov]

On Tue, Feb 03, 2015 at 06:09:57PM -0800, Ray Jui wrote:
> This patchset contains the initial pinctrl (IOMUX) support for the Broadcom
> Cygnus SoC. The Cygnus IOMUX controller supports group based mux configuration
> and allows certain pins to be muxed to GPIO function individually
> 
> Changes from v3:
>  - Fix the driver to have more proper use of "const" in various places
>  - Other minor improvements
> 
> Changes from v2:
>  - Consolidate all Broadcom pinctrl drivers into drivers/pinctrl/bcm/*
>  - Change the Cygnus IOMUX driver to use standard Linux pinctrl subnode
> properties such as "function" and "groups" for pinmux configuration, instead
> of non-standard properties such as "brcm,function" and "brcm,group"
>  - Use real function names like "spi0", "lcd", "key", and etc. instead of HW
> specific mux names like "alt1", "alt2", "alt3", and etc.
>  - Add suffix "grp" to all group names
>  - Add support to allow individual pins to be muxed to GPIO function through
> subsystem callbacks "gpio_request_enable" and "gpio_disable_free", and get rid
> of all GPIO groups
>  - Other minor improvements in the driver
> 
> Changes from v1:
>  - Fix a typo in device tree binding document

FWIW I tested this series on BCM958305K SVK.

Tested-by: Dmitry Torokhov <dtor@chromium.org>

Thanks.

-- 
Dmitry

[PATCH v8 0/4] Add gpio/pinconf support to Broadcom Cygnus SoC

[Ray Jui]

This patchset contains the initial GPIO/PINCONF support for the Broadcom
Cygnus SoC.

Cygnus has 3 GPIO controllers: 1) the ASIU GPIO; 2) the chipCommonG GPIO;
and 3) the ALWAYS-ON GPIO. All 3 types of GPIO controllers are supported by
the this driver.

All 3 Cygnus GPIO controllers support basic PINCONF functions such as bias
pull up, pull down, and drive strength configurations, when these pins are
muxed to GPIO.

Pins from the ASIU GPIO can be individually muxed to GPIO function, through
interaction with the Cygnus IOMUX controller.

Note this patchset has a dependency on the other patchset "Add pinctrl support
to Broadcom Cygnus SoC" that is also under review

Changes from v7:
 - Use 'bool' instead of 'int' for flag that indicates pinmux support in the
   driver
 - Call put_device to drop reference to the pinmux dev after call to
   of_find_device_by_node
 - Replace kasprintf with devm_kasprintf and remove memory deallocation logic
   in the driver
 - Set suppress_bind_attrs to true for the driver

Changes from v6:
 - Move the driver from drivers/gpio/* to drivers/pinctrl/* since this driver
   supports both GPIO and some basic PINCONF features
 - Support PINCONF features through standard DT subnodes properties including
   "bias-disable", "bias-pull-up", "bias-pull-down", and "drive-strength", by
   creating local PINCONF controller
 - Add support to allow individual ASIU GPIO pins to be muxed as GPIO, through
   interactions with the Cygnus IOMUX driver
 - Convert the driver to use standard GPIOCHIP_IRQ APIs. This helps to reduce
   customized code in the driver
 - Other miscellaneous imrpovements in the driver
 - Enable GPIO based phone hook detection support for BCM911360 phone factor
   board

Changes from v5:
 - Get rid of DT property "linux,gpio-base". Use dynamic allocation for GPIO base
   number

Changes from v4:
 - Use DT property "linux,gpio-base" to define GPIO base number
 - factorize common code to improve code readability and reduce code size
 - remove "bcm_" prefix on function and struct names
 - improve debugging prints
 - default GPIO_BCM_CYGNUS to y in Kconfig (it still depends on
   ARCH_BCM_CYGNUS). This way we do not need to select it from the
   arch/arm/mach-bcm/Kconfig
 - Get rid of redundant MAINTAINER entry for this driver. It will be maintained
   by Broadcom iProc/Cygnus maintainers
 - Update device tree document based on driver changes

Changes from v3:
 - Fix dt property tpyo
 - Fix incorrect GPIO compatible ID in device tree binding document example

Changes from v2:
 - Consolidate different compatible IDs into "brcm,cygnus-gpio"
 - Get rid of redundant "no-interrupt" property

Changes from v1:
 - Get rid of inline qualifier
 - Get rid of redundant check in the ISR
 - Other minor fixes to imrove code readability

Ray Jui (4):
  pinctrl: Cygnus: define Broadcom Cygnus GPIO/PINCONF binding
  pinctrl: cygnus: add gpio/pinconf driver
  ARM: dts: enable GPIO for Broadcom Cygnus
  ARM: dts: cygnus: enable GPIO based hook detection

 .../bindings/pinctrl/brcm,cygnus-gpio.txt          |  102 +++
 arch/arm/boot/dts/bcm-cygnus.dtsi                  |   33 +
 arch/arm/boot/dts/bcm911360_entphn.dts             |   13 +
 drivers/pinctrl/bcm/Kconfig                        |   22 +
 drivers/pinctrl/bcm/Makefile                       |    1 +
 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c          |  907 ++++++++++++++++++++
 6 files changed, 1078 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c

-- 
1.7.9.5

[PATCH v8 1/4] pinctrl: Cygnus: define Broadcom Cygnus GPIO/PINCONF binding

[Ray Jui]

Document the GPIO/PINCONF device tree binding for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 .../bindings/pinctrl/brcm,cygnus-gpio.txt          |  102 ++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt

diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
new file mode 100644
index 0000000..9b9196c
--- /dev/null
+++ b/Documentation/devicetree/bindings/pinctrl/brcm,cygnus-gpio.txt
@@ -0,0 +1,102 @@
+Broadcom Cygnus GPIO/PINCONF Controller
+
+Required properties:
+
+- compatible:
+    Must be "brcm,cygnus-gpio"
+
+- reg:
+    Define the base and range of the I/O address space that contains the Cygnus
+GPIO/PINCONF controller registers
+
+- ngpios:
+    Total number of GPIOs the controller provides
+
+- #gpio-cells:
+    Must be two. The first cell is the GPIO pin number (within the
+controller's pin space) and the second cell is used for the following:
+    bit[0]: polarity (0 for active high and 1 for active low)
+
+- gpio-controller:
+    Specifies that the node is a GPIO controller
+
+Optional properties:
+
+- interrupts:
+    Interrupt ID
+
+- interrupt-controller:
+    Specifies that the node is an interrupt controller
+
+- pinmux:
+    Specifies the phandle to the IOMUX device, where pins can be individually
+muxed to GPIO
+
+Supported generic PINCONF properties in child nodes:
+
+- pins:
+    The list of pins (within the controller's own pin space) that properties
+in the node apply to. Pin names are "gpio-<pin>"
+
+- bias-disable:
+    Disable pin bias
+
+- bias-pull-up:
+    Enable internal pull up resistor
+
+- bias-pull-down:
+    Enable internal pull down resistor
+
+- drive-strength:
+    Valid drive strength values include 2, 4, 6, 8, 10, 12, 14, 16 (mA)
+
+Example:
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x1800a000 0x50>,
+		      <0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+
+		touch_pins: touch_pins {
+			pwr: pwr {
+				pins = "gpio-0";
+				drive-strength = <16>;
+			};
+
+			event: event {
+				pins = "gpio-1";
+				bias-pull-up;
+			};
+		};
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <146>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	/*
+	 * Touchscreen that uses the CCM GPIO 0 and 1
+	 */
+	tsc {
+		...
+		...
+		gpio-pwr = <&gpio_ccm 0 0>;
+		gpio-event = <&gpio_ccm 1 0>;
+	};
+
+	/* Bluetooth that uses the ASIU GPIO 5, with polarity inverted */
+	bluetooth {
+		...
+		...
+		bcm,rfkill-bank-sel = <&gpio_asiu 5 1>
+	}
-- 
1.7.9.5

[PATCH v8 2/4] pinctrl: cygnus: add gpio/pinconf driver

[Ray Jui]

This adds the initial support of the Broadcom Cygnus GPIO/PINCONF driver
that supports all 3 GPIO controllers on Cygnus including the ASIU GPIO
controller, the chipCommonG GPIO controller, and the always-on GPIO
controller. Basic PINCONF configurations such as bias pull up/down, and
drive strength are also supported in this driver.

Pins from the ASIU GPIO controller can be individually muxed to GPIO
function, through interaction with the Cygnus IOMUX controller

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 drivers/pinctrl/bcm/Kconfig               |   22 +
 drivers/pinctrl/bcm/Makefile              |    1 +
 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c |  907 +++++++++++++++++++++++++++++
 3 files changed, 930 insertions(+)
 create mode 100644 drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c

diff --git a/drivers/pinctrl/bcm/Kconfig b/drivers/pinctrl/bcm/Kconfig
index eb13201..cd11d4d 100644
--- a/drivers/pinctrl/bcm/Kconfig
+++ b/drivers/pinctrl/bcm/Kconfig
@@ -20,6 +20,28 @@ config PINCTRL_BCM2835
 	select PINMUX
 	select PINCONF
 
+config PINCTRL_CYGNUS_GPIO
+	bool "Broadcom Cygnus GPIO (with PINCONF) driver"
+	depends on OF_GPIO && ARCH_BCM_CYGNUS
+	select GPIOLIB_IRQCHIP
+	select PINCONF
+	select GENERIC_PINCONF
+	default ARCH_BCM_CYGNUS
+	help
+	  Say yes here to enable the Broadcom Cygnus GPIO driver.
+
+	  The Broadcom Cygnus SoC has 3 GPIO controllers including the ASIU
+	  GPIO controller (ASIU), the chipCommonG GPIO controller (CCM), and
+	  the always-ON GPIO controller (CRMU/AON). All 3 GPIO controllers are
+	  supported by this driver.
+
+	  All 3 Cygnus GPIO controllers support basic PINCONF functions such
+	  as bias pull up, pull down, and drive strength configurations, when
+	  these pins are muxed to GPIO.
+
+	  Pins from the ASIU GPIO can be individually muxed to GPIO function,
+	  through interaction with the Cygnus IOMUX controller.
+
 config PINCTRL_CYGNUS_MUX
 	bool "Broadcom Cygnus IOMUX driver"
 	depends on (ARCH_BCM_CYGNUS || COMPILE_TEST)
diff --git a/drivers/pinctrl/bcm/Makefile b/drivers/pinctrl/bcm/Makefile
index bb6beb6..2b2f70e 100644
--- a/drivers/pinctrl/bcm/Makefile
+++ b/drivers/pinctrl/bcm/Makefile
@@ -2,4 +2,5 @@
 
 obj-$(CONFIG_PINCTRL_BCM281XX)		+= pinctrl-bcm281xx.o
 obj-$(CONFIG_PINCTRL_BCM2835)		+= pinctrl-bcm2835.o
+obj-$(CONFIG_PINCTRL_CYGNUS_GPIO)	+= pinctrl-cygnus-gpio.o
 obj-$(CONFIG_PINCTRL_CYGNUS_MUX)	+= pinctrl-cygnus-mux.o
diff --git a/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
new file mode 100644
index 0000000..1feab0c
--- /dev/null
+++ b/drivers/pinctrl/bcm/pinctrl-cygnus-gpio.c
@@ -0,0 +1,907 @@
+/*
+ * Copyright (C) 2014-2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This file contains the Broadcom Cygnus GPIO driver that supports 3
+ * GPIO controllers on Cygnus including the ASIU GPIO controller, the
+ * chipCommonG GPIO controller, and the always-on GPIO controller. Basic
+ * PINCONF such as bias pull up/down, and drive strength are also supported
+ * in this driver.
+ *
+ * Pins from the ASIU GPIO can be individually muxed to GPIO function,
+ * through the interaction with the Cygnus IOMUX controller
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/ioport.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+
+#include "../pinctrl-utils.h"
+
+#define CYGNUS_GPIO_DATA_IN_OFFSET   0x00
+#define CYGNUS_GPIO_DATA_OUT_OFFSET  0x04
+#define CYGNUS_GPIO_OUT_EN_OFFSET    0x08
+#define CYGNUS_GPIO_IN_TYPE_OFFSET   0x0c
+#define CYGNUS_GPIO_INT_DE_OFFSET    0x10
+#define CYGNUS_GPIO_INT_EDGE_OFFSET  0x14
+#define CYGNUS_GPIO_INT_MSK_OFFSET   0x18
+#define CYGNUS_GPIO_INT_STAT_OFFSET  0x1c
+#define CYGNUS_GPIO_INT_MSTAT_OFFSET 0x20
+#define CYGNUS_GPIO_INT_CLR_OFFSET   0x24
+#define CYGNUS_GPIO_PAD_RES_OFFSET   0x34
+#define CYGNUS_GPIO_RES_EN_OFFSET    0x38
+
+/* drive strength control for ASIU GPIO */
+#define CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET 0x58
+
+/* drive strength control for CCM/CRMU (AON) GPIO */
+#define CYGNUS_GPIO_DRV0_CTRL_OFFSET  0x00
+
+#define GPIO_BANK_SIZE 0x200
+#define NGPIOS_PER_BANK 32
+#define GPIO_BANK(pin) ((pin) / NGPIOS_PER_BANK)
+
+#define CYGNUS_GPIO_REG(pin, reg) (GPIO_BANK(pin) * GPIO_BANK_SIZE + (reg))
+#define CYGNUS_GPIO_SHIFT(pin) ((pin) % NGPIOS_PER_BANK)
+
+#define GPIO_DRV_STRENGTH_BIT_SHIFT  20
+#define GPIO_DRV_STRENGTH_BITS       3
+#define GPIO_DRV_STRENGTH_BIT_MASK   ((1 << GPIO_DRV_STRENGTH_BITS) - 1)
+
+/*
+ * Cygnus GPIO core
+ *
+ * @dev: pointer to device
+ * @base: I/O register base for Cygnus GPIO controller
+ * @io_ctrl: I/O register base for certain type of Cygnus GPIO controller that
+ * has the PINCONF support implemented outside of the GPIO block
+ * @lock: lock to protect access to I/O registers
+ * @gc: GPIO chip
+ * @num_banks: number of GPIO banks, each bank supports up to 32 GPIOs
+ * @pinmux_is_supported: flag to indicate this GPIO controller contains pins
+ * that can be individually muxed to GPIO
+ * @pctl: pointer to pinctrl_dev
+ * @pctldesc: pinctrl descriptor
+ */
+struct cygnus_gpio {
+	struct device *dev;
+
+	void __iomem *base;
+	void __iomem *io_ctrl;
+
+	spinlock_t lock;
+
+	struct gpio_chip gc;
+	unsigned num_banks;
+
+	bool pinmux_is_supported;
+
+	struct pinctrl_dev *pctl;
+	struct pinctrl_desc pctldesc;
+};
+
+static struct cygnus_gpio *to_cygnus_gpio(struct gpio_chip *gc)
+{
+	return container_of(gc, struct cygnus_gpio, gc);
+}
+
+/*
+ * Mapping from PINCONF pins to GPIO pins is 1-to-1
+ */
+static unsigned cygnus_pin_to_gpio(unsigned pin)
+{
+	return pin;
+}
+
+static u32 cygnus_readl(struct cygnus_gpio *chip, unsigned int offset)
+{
+	return readl(chip->base + offset);
+}
+
+static void cygnus_writel(struct cygnus_gpio *chip, unsigned int offset,
+			  u32 val)
+{
+	writel(val, chip->base + offset);
+}
+
+/**
+ *  cygnus_set_bit - set or clear one bit (corresponding to the GPIO pin) in a
+ *  Cygnus GPIO register
+ *
+ *  @cygnus_gpio: Cygnus GPIO device
+ *  @reg: register offset
+ *  @gpio: GPIO pin
+ *  @set: set or clear. 1 - set; 0 -clear
+ */
+static void cygnus_set_bit(struct cygnus_gpio *chip, unsigned int reg,
+			   unsigned gpio, int set)
+{
+	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val;
+
+	val = cygnus_readl(chip, offset);
+	if (set)
+		val |= BIT(shift);
+	else
+		val &= ~BIT(shift);
+	cygnus_writel(chip, offset, val);
+}
+
+static int cygnus_get_bit(struct cygnus_gpio *chip, unsigned int reg,
+			  unsigned gpio)
+{
+	unsigned int offset = CYGNUS_GPIO_REG(gpio, reg);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val;
+
+	val = cygnus_readl(chip, offset) & BIT(shift);
+	if (val)
+		return 1;
+	else
+		return 0;
+}
+
+static void cygnus_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	struct irq_chip *irq_chip = irq_desc_get_chip(desc);
+	int i, bit;
+
+	chained_irq_enter(irq_chip, desc);
+
+	/* go through the entire GPIO banks and handle all interrupts */
+	for (i = 0; i < chip->num_banks; i++) {
+		unsigned long val = cygnus_readl(chip,
+				(i * GPIO_BANK_SIZE) +
+				CYGNUS_GPIO_INT_MSTAT_OFFSET);
+
+		for_each_set_bit(bit, &val, NGPIOS_PER_BANK) {
+			unsigned pin = NGPIOS_PER_BANK * i + bit;
+			int child_irq = irq_find_mapping(gc->irqdomain, pin);
+
+			/*
+			 * Clear the interrupt before invoking the
+			 * handler, so we do not leave any window
+			 */
+			cygnus_writel(chip, (i * GPIO_BANK_SIZE) +
+				      CYGNUS_GPIO_INT_CLR_OFFSET, BIT(bit));
+
+			generic_handle_irq(child_irq);
+		}
+	}
+
+	chained_irq_exit(irq_chip, desc);
+}
+
+
+static void cygnus_gpio_irq_ack(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = d->hwirq;
+	unsigned int offset = CYGNUS_GPIO_REG(gpio,
+			CYGNUS_GPIO_INT_CLR_OFFSET);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+	u32 val = BIT(shift);
+
+	cygnus_writel(chip, offset, val);
+}
+
+/**
+ *  cygnus_gpio_irq_set_mask - mask/unmask a GPIO interrupt
+ *
+ *  @d: IRQ chip data
+ *  @mask: mask/unmask GPIO interrupt. 0 - mask (disable); 1 - unmask (enable)
+ */
+static void cygnus_gpio_irq_set_mask(struct irq_data *d, int mask)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = d->hwirq;
+
+	cygnus_set_bit(chip, CYGNUS_GPIO_INT_MSK_OFFSET, gpio, mask);
+}
+
+static void cygnus_gpio_irq_mask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_gpio_irq_set_mask(d, 0);
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static void cygnus_gpio_irq_unmask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_gpio_irq_set_mask(d, 1);
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static int cygnus_gpio_irq_set_type(struct irq_data *d, unsigned int type)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = d->hwirq;
+	int int_type = 0, dual_edge = 0, edge_lvl = 0;
+	unsigned long flags;
+
+	switch (type & IRQ_TYPE_SENSE_MASK) {
+	case IRQ_TYPE_EDGE_RISING:
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		dual_edge = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		int_type = 1;
+		edge_lvl = 1;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		int_type = 1;
+		break;
+
+	default:
+		dev_err(chip->dev, "invalid GPIO IRQ type 0x%x\n",
+			type);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_set_bit(chip, CYGNUS_GPIO_IN_TYPE_OFFSET, gpio, int_type);
+	cygnus_set_bit(chip, CYGNUS_GPIO_INT_DE_OFFSET, gpio, dual_edge);
+	cygnus_set_bit(chip, CYGNUS_GPIO_INT_EDGE_OFFSET, gpio,
+		       edge_lvl);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev,
+		"gpio:%u set int_type:%d dual_edge:%d edge_lvl:%d\n",
+		gpio, int_type, dual_edge, edge_lvl);
+
+	return 0;
+}
+
+static struct irq_chip cygnus_gpio_irq_chip = {
+	.name = "bcm-cygnus-gpio",
+	.irq_ack = cygnus_gpio_irq_ack,
+	.irq_mask = cygnus_gpio_irq_mask,
+	.irq_unmask = cygnus_gpio_irq_unmask,
+	.irq_set_type = cygnus_gpio_irq_set_type,
+};
+
+/*
+ * Request the Cygnus IOMUX pinmux controller to mux individual pins to GPIO
+ */
+static int cygnus_gpio_request(struct gpio_chip *gc, unsigned offset)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = gc->base + offset;
+
+	/* not all Cygnus GPIO pins can be muxed individually */
+	if (!chip->pinmux_is_supported)
+		return 0;
+
+	return pinctrl_request_gpio(gpio);
+}
+
+static void cygnus_gpio_free(struct gpio_chip *gc, unsigned offset)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned gpio = gc->base + offset;
+
+	if (!chip->pinmux_is_supported)
+		return;
+
+	pinctrl_free_gpio(gpio);
+}
+
+static int cygnus_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 0);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev, "gpio:%u set input\n", gpio);
+
+	return 0;
+}
+
+static int cygnus_gpio_direction_output(struct gpio_chip *gc, unsigned gpio,
+					int value)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_set_bit(chip, CYGNUS_GPIO_OUT_EN_OFFSET, gpio, 1);
+	cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev, "gpio:%u set output, value:%d\n", gpio, value);
+
+	return 0;
+}
+
+static void cygnus_gpio_set(struct gpio_chip *gc, unsigned gpio, int value)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	cygnus_set_bit(chip, CYGNUS_GPIO_DATA_OUT_OFFSET, gpio, value);
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev, "gpio:%u set, value:%d\n", gpio, value);
+}
+
+static int cygnus_gpio_get(struct gpio_chip *gc, unsigned gpio)
+{
+	struct cygnus_gpio *chip = to_cygnus_gpio(gc);
+	unsigned int offset = CYGNUS_GPIO_REG(gpio,
+					      CYGNUS_GPIO_DATA_IN_OFFSET);
+	unsigned int shift = CYGNUS_GPIO_SHIFT(gpio);
+
+	return !!(cygnus_readl(chip, offset) & BIT(shift));
+}
+
+static int cygnus_get_groups_count(struct pinctrl_dev *pctldev)
+{
+	return 1;
+}
+
+/*
+ * Only one group: "gpio_grp", since this local pinctrl device only performs
+ * GPIO specific PINCONF configurations
+ */
+static const char *cygnus_get_group_name(struct pinctrl_dev *pctldev,
+					 unsigned selector)
+{
+	return "gpio_grp";
+}
+
+static const struct pinctrl_ops cygnus_pctrl_ops = {
+	.get_groups_count = cygnus_get_groups_count,
+	.get_group_name = cygnus_get_group_name,
+	.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
+	.dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int cygnus_gpio_set_pull(struct cygnus_gpio *chip, unsigned gpio,
+				int disable, int pull_up)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+
+	if (disable) {
+		cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 0);
+	} else {
+		cygnus_set_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio,
+			       pull_up);
+		cygnus_set_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio, 1);
+	}
+
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	dev_dbg(chip->dev, "gpio:%u set pullup:%d\n", gpio, pull_up);
+
+	return 0;
+}
+
+static void cygnus_gpio_get_pull(struct cygnus_gpio *chip, unsigned gpio,
+				 int *disable, int *pull_up)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&chip->lock, flags);
+	*disable = !cygnus_get_bit(chip, CYGNUS_GPIO_RES_EN_OFFSET, gpio);
+	*pull_up = cygnus_get_bit(chip, CYGNUS_GPIO_PAD_RES_OFFSET, gpio);
+	spin_unlock_irqrestore(&chip->lock, flags);
+}
+
+static int cygnus_gpio_set_strength(struct cygnus_gpio *chip, unsigned gpio,
+				    unsigned strength)
+{
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	/* make sure drive strength is supported */
+	if (strength < 2 ||  strength > 16 || (strength % 2))
+		return -ENOTSUPP;
+
+	if (chip->io_ctrl) {
+		base = chip->io_ctrl;
+		offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
+	} else {
+		base = chip->base;
+		offset = CYGNUS_GPIO_REG(gpio,
+					 CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
+	}
+
+	shift = CYGNUS_GPIO_SHIFT(gpio);
+
+	dev_dbg(chip->dev, "gpio:%u set drive strength:%d mA\n", gpio,
+		strength);
+
+	spin_lock_irqsave(&chip->lock, flags);
+	strength = (strength / 2) - 1;
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset);
+		val &= ~BIT(shift);
+		val |= ((strength >> i) & 0x1) << shift;
+		writel(val, base + offset);
+		offset += 4;
+	}
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return 0;
+}
+
+static int cygnus_gpio_get_strength(struct cygnus_gpio *chip, unsigned gpio,
+				    u16 *strength)
+{
+	void __iomem *base;
+	unsigned int i, offset, shift;
+	u32 val;
+	unsigned long flags;
+
+	if (chip->io_ctrl) {
+		base = chip->io_ctrl;
+		offset = CYGNUS_GPIO_DRV0_CTRL_OFFSET;
+	} else {
+		base = chip->base;
+		offset = CYGNUS_GPIO_REG(gpio,
+					 CYGNUS_GPIO_ASIU_DRV0_CTRL_OFFSET);
+	}
+
+	shift = CYGNUS_GPIO_SHIFT(gpio);
+
+	spin_lock_irqsave(&chip->lock, flags);
+	*strength = 0;
+	for (i = 0; i < GPIO_DRV_STRENGTH_BITS; i++) {
+		val = readl(base + offset) & BIT(shift);
+		val >>= shift;
+		*strength += (val << i);
+		offset += 4;
+	}
+
+	/* convert to mA */
+	*strength = (*strength + 1) * 2;
+	spin_unlock_irqrestore(&chip->lock, flags);
+
+	return 0;
+}
+
+static int cygnus_pin_config_get(struct pinctrl_dev *pctldev, unsigned pin,
+				 unsigned long *config)
+{
+	struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
+	enum pin_config_param param = pinconf_to_config_param(*config);
+	unsigned gpio = cygnus_pin_to_gpio(pin);
+	u16 arg;
+	int disable, pull_up, ret;
+
+	switch (param) {
+	case PIN_CONFIG_BIAS_DISABLE:
+		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+		if (disable)
+			return 0;
+		else
+			return -EINVAL;
+
+	case PIN_CONFIG_BIAS_PULL_UP:
+		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+		if (!disable && pull_up)
+			return 0;
+		else
+			return -EINVAL;
+
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		cygnus_gpio_get_pull(chip, gpio, &disable, &pull_up);
+		if (!disable && !pull_up)
+			return 0;
+		else
+			return -EINVAL;
+
+	case PIN_CONFIG_DRIVE_STRENGTH:
+		ret = cygnus_gpio_get_strength(chip, gpio, &arg);
+		if (ret)
+			return ret;
+		else
+			*config = pinconf_to_config_packed(param, arg);
+
+		return 0;
+
+	default:
+		return -ENOTSUPP;
+	}
+
+	return -ENOTSUPP;
+}
+
+static int cygnus_pin_config_set(struct pinctrl_dev *pctldev, unsigned pin,
+				 unsigned long *configs, unsigned num_configs)
+{
+	struct cygnus_gpio *chip = pinctrl_dev_get_drvdata(pctldev);
+	enum pin_config_param param;
+	u16 arg;
+	unsigned i, gpio = cygnus_pin_to_gpio(pin);
+	int ret = -ENOTSUPP;
+
+	for (i = 0; i < num_configs; i++) {
+		param = pinconf_to_config_param(configs[i]);
+		arg = pinconf_to_config_argument(configs[i]);
+
+		switch (param) {
+		case PIN_CONFIG_BIAS_DISABLE:
+			ret = cygnus_gpio_set_pull(chip, gpio, 1, 0);
+			if (ret < 0)
+				goto out;
+			break;
+
+		case PIN_CONFIG_BIAS_PULL_UP:
+			ret = cygnus_gpio_set_pull(chip, gpio, 0, 1);
+			if (ret < 0)
+				goto out;
+			break;
+
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			ret = cygnus_gpio_set_pull(chip, gpio, 0, 0);
+			if (ret < 0)
+				goto out;
+			break;
+
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			ret = cygnus_gpio_set_strength(chip, gpio, arg);
+			if (ret < 0)
+				goto out;
+			break;
+
+		default:
+			dev_err(chip->dev, "invalid configuration\n");
+			return -ENOTSUPP;
+		}
+	} /* for each config */
+
+out:
+	return ret;
+}
+
+static const struct pinconf_ops cygnus_pconf_ops = {
+	.is_generic = true,
+	.pin_config_get = cygnus_pin_config_get,
+	.pin_config_set = cygnus_pin_config_set,
+};
+
+/*
+ * Map a GPIO in the local gpio_chip pin space to a pin in the Cygnus IOMUX
+ * pinctrl pin space
+ */
+struct cygnus_gpio_pin_range {
+	unsigned offset;
+	unsigned pin_base;
+	unsigned num_pins;
+};
+
+#define CYGNUS_PINRANGE(o, p, n) { .offset = o, .pin_base = p, .num_pins = n }
+
+/*
+ * Pin mapping table for mapping local GPIO pins to Cygnus IOMUX pinctrl pins
+ */
+static const struct cygnus_gpio_pin_range cygnus_gpio_pintable[] = {
+	CYGNUS_PINRANGE(0, 42, 1),
+	CYGNUS_PINRANGE(1, 44, 3),
+	CYGNUS_PINRANGE(4, 48, 1),
+	CYGNUS_PINRANGE(5, 50, 3),
+	CYGNUS_PINRANGE(8, 126, 1),
+	CYGNUS_PINRANGE(9, 155, 1),
+	CYGNUS_PINRANGE(10, 152, 1),
+	CYGNUS_PINRANGE(11, 154, 1),
+	CYGNUS_PINRANGE(12, 153, 1),
+	CYGNUS_PINRANGE(13, 127, 3),
+	CYGNUS_PINRANGE(16, 140, 1),
+	CYGNUS_PINRANGE(17, 145, 7),
+	CYGNUS_PINRANGE(24, 130, 10),
+	CYGNUS_PINRANGE(34, 141, 4),
+	CYGNUS_PINRANGE(38, 54, 1),
+	CYGNUS_PINRANGE(39, 56, 3),
+	CYGNUS_PINRANGE(42, 60, 3),
+	CYGNUS_PINRANGE(45, 64, 3),
+	CYGNUS_PINRANGE(48, 68, 2),
+	CYGNUS_PINRANGE(50, 84, 6),
+	CYGNUS_PINRANGE(56, 94, 6),
+	CYGNUS_PINRANGE(62, 72, 1),
+	CYGNUS_PINRANGE(63, 70, 1),
+	CYGNUS_PINRANGE(64, 80, 1),
+	CYGNUS_PINRANGE(65, 74, 3),
+	CYGNUS_PINRANGE(68, 78, 1),
+	CYGNUS_PINRANGE(69, 82, 1),
+	CYGNUS_PINRANGE(70, 156, 17),
+	CYGNUS_PINRANGE(87, 104, 12),
+	CYGNUS_PINRANGE(99, 102, 2),
+	CYGNUS_PINRANGE(101, 90, 4),
+	CYGNUS_PINRANGE(105, 116, 10),
+	CYGNUS_PINRANGE(123, 11, 1),
+	CYGNUS_PINRANGE(124, 38, 4),
+	CYGNUS_PINRANGE(128, 43, 1),
+	CYGNUS_PINRANGE(129, 47, 1),
+	CYGNUS_PINRANGE(130, 49, 1),
+	CYGNUS_PINRANGE(131, 53, 1),
+	CYGNUS_PINRANGE(132, 55, 1),
+	CYGNUS_PINRANGE(133, 59, 1),
+	CYGNUS_PINRANGE(134, 63, 1),
+	CYGNUS_PINRANGE(135, 67, 1),
+	CYGNUS_PINRANGE(136, 71, 1),
+	CYGNUS_PINRANGE(137, 73, 1),
+	CYGNUS_PINRANGE(138, 77, 1),
+	CYGNUS_PINRANGE(139, 79, 1),
+	CYGNUS_PINRANGE(140, 81, 1),
+	CYGNUS_PINRANGE(141, 83, 1),
+	CYGNUS_PINRANGE(142, 10, 1)
+};
+
+/*
+ * The Cygnus IOMUX controller mainly supports group based mux configuration,
+ * but certain pins can be muxed to GPIO individually. Only the ASIU GPIO
+ * controller can support this, so it's an optional configuration
+ *
+ * Return -ENODEV means no support and that's fine
+ */
+static int cygnus_gpio_pinmux_add_range(struct cygnus_gpio *chip)
+{
+	struct device_node *node = chip->dev->of_node;
+	struct device_node *pinmux_node;
+	struct platform_device *pinmux_pdev;
+	struct gpio_chip *gc = &chip->gc;
+	int i, ret;
+
+	/* parse DT to find the phandle to the pinmux controller */
+	pinmux_node = of_parse_phandle(node, "pinmux", 0);
+	if (!pinmux_node)
+		return -ENODEV;
+
+	pinmux_pdev = of_find_device_by_node(pinmux_node);
+	if (!pinmux_pdev) {
+		dev_err(chip->dev, "failed to get pinmux device\n");
+		return -EINVAL;
+	}
+
+	/* now need to create the mapping between local GPIO and PINMUX pins */
+	for (i = 0; i < ARRAY_SIZE(cygnus_gpio_pintable); i++) {
+		ret = gpiochip_add_pin_range(gc, dev_name(&pinmux_pdev->dev),
+					     cygnus_gpio_pintable[i].offset,
+					     cygnus_gpio_pintable[i].pin_base,
+					     cygnus_gpio_pintable[i].num_pins);
+		if (ret) {
+			dev_err(chip->dev, "unable to add GPIO pin range\n");
+			goto err_put_device;
+		}
+	}
+
+	chip->pinmux_is_supported = true;
+
+	/* no need for pinmux_pdev device reference anymore */
+	put_device(&pinmux_pdev->dev);
+	return 0;
+
+err_put_device:
+	put_device(&pinmux_pdev->dev);
+	gpiochip_remove_pin_ranges(gc);
+	return ret;
+}
+
+static void cygnus_gpio_pinmux_remove_range(struct cygnus_gpio *chip)
+{
+	struct gpio_chip *gc = &chip->gc;
+
+	if (chip->pinmux_is_supported)
+		gpiochip_remove_pin_ranges(gc);
+}
+
+/*
+ * Cygnus GPIO controller supports some PINCONF related configurations such as
+ * pull up, pull down, and drive strength, when the pin is configured to GPIO
+ *
+ * Here a local pinctrl device is created with simple 1-to-1 pin mapping to the
+ * local GPIO pins
+ */
+static int cygnus_gpio_register_pinconf(struct cygnus_gpio *chip)
+{
+	struct pinctrl_desc *pctldesc = &chip->pctldesc;
+	struct pinctrl_pin_desc *pins;
+	struct gpio_chip *gc = &chip->gc;
+	int i;
+
+	pins = devm_kcalloc(chip->dev, gc->ngpio, sizeof(*pins), GFP_KERNEL);
+	if (!pins)
+		return -ENOMEM;
+
+	for (i = 0; i < gc->ngpio; i++) {
+		pins[i].number = i;
+		pins[i].name = devm_kasprintf(chip->dev, GFP_KERNEL,
+					      "gpio-%d", i);
+		if (!pins[i].name)
+			return -ENOMEM;
+	}
+
+	pctldesc->name = dev_name(chip->dev);
+	pctldesc->pctlops = &cygnus_pctrl_ops;
+	pctldesc->pins = pins;
+	pctldesc->npins = gc->ngpio;
+	pctldesc->confops = &cygnus_pconf_ops;
+
+	chip->pctl = pinctrl_register(pctldesc, chip->dev, chip);
+	if (!chip->pctl) {
+		dev_err(chip->dev, "unable to register pinctrl device\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static void cygnus_gpio_unregister_pinconf(struct cygnus_gpio *chip)
+{
+	if (chip->pctl)
+		pinctrl_unregister(chip->pctl);
+}
+
+static const struct of_device_id cygnus_gpio_of_match[] = {
+	{ .compatible = "brcm,cygnus-gpio" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cygnus_gpio_of_match);
+
+static int cygnus_gpio_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct cygnus_gpio *chip;
+	struct gpio_chip *gc;
+	u32 ngpios;
+	int irq, ret;
+
+	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->dev = dev;
+	platform_set_drvdata(pdev, chip);
+
+	if (of_property_read_u32(dev->of_node, "ngpios", &ngpios)) {
+		dev_err(dev, "missing ngpios DT property\n");
+		return -ENODEV;
+	}
+	chip->num_banks = (ngpios + NGPIOS_PER_BANK - 1) / NGPIOS_PER_BANK;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	chip->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(chip->base)) {
+		dev_err(dev, "unable to map I/O memory\n");
+		return PTR_ERR(chip->base);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (res) {
+		chip->io_ctrl = devm_ioremap_resource(dev, res);
+		if (IS_ERR(chip->io_ctrl)) {
+			dev_err(dev, "unable to map I/O memory\n");
+			return PTR_ERR(chip->io_ctrl);
+		}
+	}
+
+	spin_lock_init(&chip->lock);
+
+	gc = &chip->gc;
+	gc->base = -1;
+	gc->ngpio = ngpios;
+	gc->label = dev_name(dev);
+	gc->dev = dev;
+	gc->of_node = dev->of_node;
+	gc->request = cygnus_gpio_request;
+	gc->free = cygnus_gpio_free;
+	gc->direction_input = cygnus_gpio_direction_input;
+	gc->direction_output = cygnus_gpio_direction_output;
+	gc->set = cygnus_gpio_set;
+	gc->get = cygnus_gpio_get;
+
+	ret = gpiochip_add(gc);
+	if (ret < 0) {
+		dev_err(dev, "unable to add GPIO chip\n");
+		return ret;
+	}
+
+	ret = cygnus_gpio_pinmux_add_range(chip);
+	if (ret && ret != -ENODEV) {
+		dev_err(dev, "unable to add GPIO pin range\n");
+		goto err_rm_gpiochip;
+	}
+
+	ret = cygnus_gpio_register_pinconf(chip);
+	if (ret) {
+		dev_err(dev, "unable to register pinconf\n");
+		goto err_rm_range;
+	}
+
+	/* optional GPIO interrupt support */
+	irq = platform_get_irq(pdev, 0);
+	if (irq) {
+		ret = gpiochip_irqchip_add(gc, &cygnus_gpio_irq_chip, 0,
+					   handle_simple_irq, IRQ_TYPE_NONE);
+		if (ret) {
+			dev_err(dev, "no GPIO irqchip\n");
+			goto err_unregister_pinconf;
+		}
+
+		gpiochip_set_chained_irqchip(gc, &cygnus_gpio_irq_chip, irq,
+					     cygnus_gpio_irq_handler);
+	}
+
+	return 0;
+
+err_unregister_pinconf:
+	cygnus_gpio_unregister_pinconf(chip);
+
+err_rm_range:
+	cygnus_gpio_pinmux_remove_range(chip);
+
+err_rm_gpiochip:
+	gpiochip_remove(gc);
+
+	return ret;
+}
+
+static struct platform_driver cygnus_gpio_driver = {
+	.driver = {
+		.name = "cygnus-gpio",
+		.of_match_table = cygnus_gpio_of_match,
+		.suppress_bind_attrs = true,
+	},
+	.probe = cygnus_gpio_probe,
+};
+
+static int __init cygnus_gpio_init(void)
+{
+	return platform_driver_probe(&cygnus_gpio_driver, cygnus_gpio_probe);
+}
+arch_initcall_sync(cygnus_gpio_init);
+
+MODULE_AUTHOR("Ray Jui <rjui@broadcom.com>");
+MODULE_DESCRIPTION("Broadcom Cygnus GPIO Driver");
+MODULE_LICENSE("GPL v2");
-- 
1.7.9.5

Re: [PATCH v8 2/4] pinctrl: cygnus: add gpio/pinconf driver

[Dmitry Torokhov]

Hi Ray,

On Wed, Feb 04, 2015 at 09:21:01AM -0800, Ray Jui wrote:
> +static int cygnus_gpio_pinmux_add_range(struct cygnus_gpio *chip)
> +{
> +	struct device_node *node = chip->dev->of_node;
> +	struct device_node *pinmux_node;
> +	struct platform_device *pinmux_pdev;
> +	struct gpio_chip *gc = &chip->gc;
> +	int i, ret;
> +
> +	/* parse DT to find the phandle to the pinmux controller */
> +	pinmux_node = of_parse_phandle(node, "pinmux", 0);
> +	if (!pinmux_node)
> +		return -ENODEV;
> +
> +	pinmux_pdev = of_find_device_by_node(pinmux_node);
> +	if (!pinmux_pdev) {
> +		dev_err(chip->dev, "failed to get pinmux device\n");
> +		return -EINVAL;
> +	}
> +
> +	/* now need to create the mapping between local GPIO and PINMUX pins */
> +	for (i = 0; i < ARRAY_SIZE(cygnus_gpio_pintable); i++) {
> +		ret = gpiochip_add_pin_range(gc, dev_name(&pinmux_pdev->dev),
> +					     cygnus_gpio_pintable[i].offset,
> +					     cygnus_gpio_pintable[i].pin_base,
> +					     cygnus_gpio_pintable[i].num_pins);
> +		if (ret) {
> +			dev_err(chip->dev, "unable to add GPIO pin range\n");
> +			goto err_put_device;
> +		}
> +	}
> +
> +	chip->pinmux_is_supported = true;
> +
> +	/* no need for pinmux_pdev device reference anymore */
> +	put_device(&pinmux_pdev->dev);

Sorry I did not notice it before, but of_parse_phandle() takes reference
to the returned device node, so you need to "put" it here and in error
path as well. Actually you can do:

	int ret = 0;

	pinmux_node = of_parse_phandle(node, "pinmux", 0);
	if (!pinmux_node)
		return -ENODEV;

	pinmux_pdev = of_find_device_by_node(pinmux_node);
	/* We do not longer need pinmux node */
	of_node_put(pinmux_node);

	if (!pinmux_dev)
		....

	for (..) {
		...
		if (ret) {
			dev_err(...);
			break;
		}
	}

	chip->pinmux_is_supported = (ret == 0);
	put_device(..);
	return ret;
}

This way you free resources in the same path.

...

> +
> +static struct platform_driver cygnus_gpio_driver = {
> +	.driver = {
> +		.name = "cygnus-gpio",
> +		.of_match_table = cygnus_gpio_of_match,
> +		.suppress_bind_attrs = true,
> +	},
> +	.probe = cygnus_gpio_probe,
> +};
> +
> +static int __init cygnus_gpio_init(void)
> +{
> +	return platform_driver_probe(&cygnus_gpio_driver, cygnus_gpio_probe);

When I asked you to add ".suppress_bind_attrs = true" I missed the fact
that you were using platform_driver_probe() which already does this
internally. However platform_driver_probe() can't handle deferred
probing, which may or may not be OK. Is there a chance that any of the
resources needed by the driver return -EPROBE_DEFER? If not then it is
safe to continue using platform_driver_probe() and you can drop
suppress_bind_attrs assignment, otherwise it may be better to switch to
platform_driver_register().

Thanks.

-- 
Dmitry

Re: [PATCH v8 2/4] pinctrl: cygnus: add gpio/pinconf driver

[Ray Jui]

On 2/9/2015 11:20 AM, Dmitry Torokhov wrote:
> Hi Ray,
> 
> On Wed, Feb 04, 2015 at 09:21:01AM -0800, Ray Jui wrote:
>> +static int cygnus_gpio_pinmux_add_range(struct cygnus_gpio *chip)
>> +{
>> +	struct device_node *node = chip->dev->of_node;
>> +	struct device_node *pinmux_node;
>> +	struct platform_device *pinmux_pdev;
>> +	struct gpio_chip *gc = &chip->gc;
>> +	int i, ret;
>> +
>> +	/* parse DT to find the phandle to the pinmux controller */
>> +	pinmux_node = of_parse_phandle(node, "pinmux", 0);
>> +	if (!pinmux_node)
>> +		return -ENODEV;
>> +
>> +	pinmux_pdev = of_find_device_by_node(pinmux_node);
>> +	if (!pinmux_pdev) {
>> +		dev_err(chip->dev, "failed to get pinmux device\n");
>> +		return -EINVAL;
>> +	}
>> +
>> +	/* now need to create the mapping between local GPIO and PINMUX pins */
>> +	for (i = 0; i < ARRAY_SIZE(cygnus_gpio_pintable); i++) {
>> +		ret = gpiochip_add_pin_range(gc, dev_name(&pinmux_pdev->dev),
>> +					     cygnus_gpio_pintable[i].offset,
>> +					     cygnus_gpio_pintable[i].pin_base,
>> +					     cygnus_gpio_pintable[i].num_pins);
>> +		if (ret) {
>> +			dev_err(chip->dev, "unable to add GPIO pin range\n");
>> +			goto err_put_device;
>> +		}
>> +	}
>> +
>> +	chip->pinmux_is_supported = true;
>> +
>> +	/* no need for pinmux_pdev device reference anymore */
>> +	put_device(&pinmux_pdev->dev);
> 
> Sorry I did not notice it before, but of_parse_phandle() takes reference
> to the returned device node, so you need to "put" it here and in error
> path as well. Actually you can do:
> 
> 	int ret = 0;
> 
> 	pinmux_node = of_parse_phandle(node, "pinmux", 0);
> 	if (!pinmux_node)
> 		return -ENODEV;
> 
> 	pinmux_pdev = of_find_device_by_node(pinmux_node);
> 	/* We do not longer need pinmux node */
> 	of_node_put(pinmux_node);
> 
> 	if (!pinmux_dev)
> 		....
> 
> 	for (..) {
> 		...
> 		if (ret) {
> 			dev_err(...);
> 			break;
> 		}
> 	}
> 
> 	chip->pinmux_is_supported = (ret == 0);
> 	put_device(..);
> 	return ret;
> }
> 
> This way you free resources in the same path.
> 

Thanks. I'll make the change.

> ...
> 
>> +
>> +static struct platform_driver cygnus_gpio_driver = {
>> +	.driver = {
>> +		.name = "cygnus-gpio",
>> +		.of_match_table = cygnus_gpio_of_match,
>> +		.suppress_bind_attrs = true,
>> +	},
>> +	.probe = cygnus_gpio_probe,
>> +};
>> +
>> +static int __init cygnus_gpio_init(void)
>> +{
>> +	return platform_driver_probe(&cygnus_gpio_driver, cygnus_gpio_probe);
> 
> When I asked you to add ".suppress_bind_attrs = true" I missed the fact
> that you were using platform_driver_probe() which already does this
> internally. However platform_driver_probe() can't handle deferred
> probing, which may or may not be OK. Is there a chance that any of the
> resources needed by the driver return -EPROBE_DEFER? If not then it is
> safe to continue using platform_driver_probe() and you can drop
> suppress_bind_attrs assignment, otherwise it may be better to switch to
> platform_driver_register().
> 
> Thanks.
> 

No I do not expect any resource that this driver depends on to return
-EPROBE_DEFER. The IOMUX driver that this driver depends on should be
initialized before this driver.

I'll drop .suppress_bind_attrs then. Thanks.

Ray

[PATCH v8 3/4] ARM: dts: enable GPIO for Broadcom Cygnus

[Ray Jui]

This enables all 3 GPIO controllers including the ASIU GPIO, the
chipcommonG GPIO, and the ALWAYS-ON GPIO, for Broadcom Cygnus SoC

Signed-off-by: Ray Jui <rjui@broadcom.com>
Reviewed-by: Scott Branden <sbranden@broadcom.com>
---
 arch/arm/boot/dts/bcm-cygnus.dtsi |   33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
index b014ce5..a3b8621 100644
--- a/arch/arm/boot/dts/bcm-cygnus.dtsi
+++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
@@ -60,6 +60,39 @@
 		      <0x0301d24c 0x2c>;
 	};
 
+	gpio_crmu: gpio@03024800 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x03024800 0x50>,
+		      <0x03024008 0x18>;
+		ngpios = <6>;
+		#gpio-cells = <2>;
+		gpio-controller;
+	};
+
+	gpio_ccm: gpio@1800a000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x1800a000 0x50>,
+		      <0x0301d164 0x20>;
+		ngpios = <24>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-controller;
+	};
+
+	gpio_asiu: gpio@180a5000 {
+		compatible = "brcm,cygnus-gpio";
+		reg = <0x180a5000 0x668>;
+		ngpios = <146>;
+		#gpio-cells = <2>;
+		gpio-controller;
+
+		pinmux = <&pinctrl>;
+
+		interrupt-controller;
+		interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+	};
+
 	amba {
 		#address-cells = <1>;
 		#size-cells = <1>;
-- 
1.7.9.5

[PATCH v8 4/4] ARM: dts: cygnus: enable GPIO based hook detection

[Ray Jui]

This enables GPIO based phone hook detection for Broadcom BCM911360
phone factor board (bcm911360_entphn)

Signed-off-by: Ray Jui <rjui@broadcom.com>
---
 arch/arm/boot/dts/bcm911360_entphn.dts |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/arm/boot/dts/bcm911360_entphn.dts b/arch/arm/boot/dts/bcm911360_entphn.dts
index d2ee952..7db4843 100644
--- a/arch/arm/boot/dts/bcm911360_entphn.dts
+++ b/arch/arm/boot/dts/bcm911360_entphn.dts
@@ -33,6 +33,7 @@
 /dts-v1/;
 
 #include "bcm-cygnus.dtsi"
+#include "dt-bindings/input/input.h"
 
 / {
 	model = "Cygnus Enterprise Phone (BCM911360_ENTPHN)";
@@ -50,4 +51,16 @@
 	uart3: serial@18023000 {
 		status = "okay";
 	};
+
+	gpio_keys {
+		compatible = "gpio-keys";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		hook {
+			label = "HOOK";
+			linux,code = <KEY_O>;
+			gpios = <&gpio_asiu 48 0>;
+		};
+	};
 };
-- 
1.7.9.5