* [PATCH 1/5] dt-bindings: pinctrl: Add gpio bindings for Actions S900 SoC
2018-05-18 2:30 [PATCH 0/5] Add gpio support for Action Semi S900 SoC Manivannan Sadhasivam
@ 2018-05-18 2:30 ` Manivannan Sadhasivam
2018-05-18 2:30 ` [PATCH 2/5] arm64: dts: actions: Add gpio properties to pinctrl node for S900 Manivannan Sadhasivam
` (3 subsequent siblings)
4 siblings, 0 replies; 9+ messages in thread
From: Manivannan Sadhasivam @ 2018-05-18 2:30 UTC (permalink / raw)
To: linus.walleij, robh+dt, afaerber
Cc: liuwei, mp-cs, 96boards, devicetree, andy.shevchenko,
daniel.thompson, amit.kucheria, linux-arm-kernel, linux-gpio,
linux-kernel, hzhang, bdong, manivannanece23,
Manivannan Sadhasivam
Add gpio bindings for Actions Semi S900 SoC.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
.../devicetree/bindings/pinctrl/actions,s900-pinctrl.txt | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/Documentation/devicetree/bindings/pinctrl/actions,s900-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/actions,s900-pinctrl.txt
index fb87c7d74f2e..300a50783aab 100644
--- a/Documentation/devicetree/bindings/pinctrl/actions,s900-pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/actions,s900-pinctrl.txt
@@ -8,6 +8,15 @@ Required Properties:
- reg: Should contain the register base address and size of
the pin controller.
- clocks: phandle of the clock feeding the pin controller
+- gpio-controller: Marks the device node as a GPIO controller.
+- #gpio-cells: Should be two. The first cell is the gpio pin number
+ and the second cell is used for optional parameters.
+- interrupt-controller: Marks the device node as an interrupt controller.
+- #interrupt-cells: Specifies the number of cells needed to encode an
+ interrupt. Shall be set to 2. The first cell
+ defines the interrupt number, the second encodes
+ the trigger flags described in
+ bindings/interrupt-controller/interrupts.txt
Please refer to pinctrl-bindings.txt in this directory for details of the
common pinctrl bindings used by client devices, including the meaning of the
@@ -164,6 +173,10 @@ Example:
compatible = "actions,s900-pinctrl";
reg = <0x0 0xe01b0000 0x0 0x1000>;
clocks = <&cmu CLK_GPIO>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
uart2-default: uart2-default {
pinmux {
--
2.14.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH 2/5] arm64: dts: actions: Add gpio properties to pinctrl node for S900
2018-05-18 2:30 [PATCH 0/5] Add gpio support for Action Semi S900 SoC Manivannan Sadhasivam
2018-05-18 2:30 ` [PATCH 1/5] dt-bindings: pinctrl: Add gpio bindings for Actions " Manivannan Sadhasivam
@ 2018-05-18 2:30 ` Manivannan Sadhasivam
2018-05-18 2:30 ` [PATCH 3/5] arm64: dts: actions: Add gpio line names to Bubblegum-96 board Manivannan Sadhasivam
` (2 subsequent siblings)
4 siblings, 0 replies; 9+ messages in thread
From: Manivannan Sadhasivam @ 2018-05-18 2:30 UTC (permalink / raw)
To: linus.walleij, robh+dt, afaerber
Cc: liuwei, mp-cs, 96boards, devicetree, andy.shevchenko,
daniel.thompson, amit.kucheria, linux-arm-kernel, linux-gpio,
linux-kernel, hzhang, bdong, manivannanece23,
Manivannan Sadhasivam
Add gpio properties to pinctrl node for Actions Semi S900 SoC.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
arch/arm64/boot/dts/actions/s900.dtsi | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/actions/s900.dtsi b/arch/arm64/boot/dts/actions/s900.dtsi
index 0156483f0f4d..05f31a954733 100644
--- a/arch/arm64/boot/dts/actions/s900.dtsi
+++ b/arch/arm64/boot/dts/actions/s900.dtsi
@@ -178,6 +178,8 @@
compatible = "actions,s900-pinctrl";
reg = <0x0 0xe01b0000 0x0 0x1000>;
clocks = <&cmu CLK_GPIO>;
+ gpio-controller;
+ #gpio-cells = <2>;
};
timer: timer@e0228000 {
--
2.14.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH 3/5] arm64: dts: actions: Add gpio line names to Bubblegum-96 board
2018-05-18 2:30 [PATCH 0/5] Add gpio support for Action Semi S900 SoC Manivannan Sadhasivam
2018-05-18 2:30 ` [PATCH 1/5] dt-bindings: pinctrl: Add gpio bindings for Actions " Manivannan Sadhasivam
2018-05-18 2:30 ` [PATCH 2/5] arm64: dts: actions: Add gpio properties to pinctrl node for S900 Manivannan Sadhasivam
@ 2018-05-18 2:30 ` Manivannan Sadhasivam
2018-05-18 2:30 ` [PATCH 4/5] pinctrl: actions: Add gpio support for Actions S900 SoC Manivannan Sadhasivam
2018-05-18 2:30 ` [PATCH 5/5] MAINTAINERS: Add Actions Semi S900 pinctrl entries Manivannan Sadhasivam
4 siblings, 0 replies; 9+ messages in thread
From: Manivannan Sadhasivam @ 2018-05-18 2:30 UTC (permalink / raw)
To: linus.walleij, robh+dt, afaerber
Cc: liuwei, mp-cs, 96boards, devicetree, andy.shevchenko,
daniel.thompson, amit.kucheria, linux-arm-kernel, linux-gpio,
linux-kernel, hzhang, bdong, manivannanece23,
Manivannan Sadhasivam
Add gpio line names to Actions Semi S900 based Bubblegum-96 board.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
arch/arm64/boot/dts/actions/s900-bubblegum-96.dts | 175 ++++++++++++++++++++++
1 file changed, 175 insertions(+)
diff --git a/arch/arm64/boot/dts/actions/s900-bubblegum-96.dts b/arch/arm64/boot/dts/actions/s900-bubblegum-96.dts
index ff043c961d75..d0ba35df9015 100644
--- a/arch/arm64/boot/dts/actions/s900-bubblegum-96.dts
+++ b/arch/arm64/boot/dts/actions/s900-bubblegum-96.dts
@@ -34,3 +34,178 @@
status = "okay";
clocks = <&cmu CLK_UART5>;
};
+
+/*
+ * GPIO name legend: proper name = the GPIO line is used as GPIO
+ * NC = not connected (pin out but not routed from the chip to
+ * anything the board)
+ * "[PER]" = pin is muxed for [peripheral] (not GPIO)
+ * LSEC = Low Speed External Connector
+ * HSEC = High Speed External Connector
+ *
+ * Line names are taken from the schematic "Schematics Bubblegum96"
+ * version v1.0
+ *
+ * For the lines routed to the external connectors the
+ * lines are named after the 96Boards CE Specification 1.0,
+ * Appendix "Expansion Connector Signal Description".
+ *
+ * When the 96Boards naming of a line and the schematic name of
+ * the same line are in conflict, the 96Boards specification
+ * takes precedence, which means that the external UART on the
+ * LSEC is named UART0 while the schematic and SoC names this
+ * UART2. Only exception is the I2C lines for which the schematic
+ * naming has been preferred. This is only for the informational
+ * lines i.e. "[FOO]", the GPIO named lines "GPIO-A" thru "GPIO-L"
+ * are the only ones actually used for GPIO.
+ */
+
+&pinctrl {
+ gpio-line-names =
+ "GPIO-A", /* GPIO_0, LSEC pin 23 */
+ "GPIO-B", /* GPIO_1, LSEC pin 24 */
+ "GPIO-C", /* GPIO_2, LSEC pin 25 */
+ "GPIO-D", /* GPIO_3, LSEC pin 26 */
+ "GPIO-E", /* GPIO_4, LSEC pin 27 */
+ "GPIO-F", /* GPIO_5, LSEC pin 28 */
+ "GPIO-G", /* GPIO_6, LSEC pin 29 */
+ "GPIO-H", /* GPIO_7, LSEC pin 30 */
+ "GPIO-I", /* GPIO_8, LSEC pin 31 */
+ "GPIO-J", /* GPIO_9, LSEC pin 32 */
+ "NC", /* GPIO_10 */
+ "NC", /* GPIO_11 */
+ "SIRQ2_1V8", /* GPIO_12 */
+ "PCM0_OUT", /* GPIO_13 */
+ "WIFI_LED", /* GPIO_14 */
+ "PCM0_SYNC", /* GPIO_15 */
+ "PCM0_CLK", /* GPIO_16 */
+ "PCM0_IN", /* GPIO_17 */
+ "BT_LED", /* GPIO_18 */
+ "LED0", /* GPIO_19 */
+ "LED1", /* GPIO_20 */
+ "JTAG_TCK", /* GPIO_21 */
+ "JTAG_TMS", /* GPIO_22 */
+ "JTAG_TDI", /* GPIO_23 */
+ "JTAG_TDO", /* GPIO_24 */
+ "[UART1_RxD]", /* GPIO_25, LSEC pin 13 */
+ "NC", /* GPIO_26 */
+ "[UART1_TxD]", /* GPIO_27, LSEC pin 11 */
+ "SD0_D0", /* GPIO_28 */
+ "SD0_D1", /* GPIO_29 */
+ "SD0_D2", /* GPIO_30 */
+ "SD0_D3", /* GPIO_31 */
+ "SD1_D0", /* GPIO_32 */
+ "SD1_D1", /* GPIO_33 */
+ "SD1_D2", /* GPIO_34 */
+ "SD1_D3", /* GPIO_35 */
+ "SD0_CMD", /* GPIO_36 */
+ "SD0_CLK", /* GPIO_37 */
+ "SD1_CMD", /* GPIO_38 */
+ "SD1_CLK", /* GPIO_39 */
+ "SPI0_SCLK", /* GPIO_40, LSEC pin 8 */
+ "SPI0_CS", /* GPIO_41, LSEC pin 12 */
+ "SPI0_DIN", /* GPIO_42, LSEC pin 10 */
+ "SPI0_DOUT", /* GPIO_43, LSEC pin 14 */
+ "I2C5_SDATA", /* GPIO_44, HSEC pin 36 */
+ "I2C5_SCLK", /* GPIO_45, HSEC pin 38 */
+ "UART0_RX", /* GPIO_46, LSEC pin 7 */
+ "UART0_TX", /* GPIO_47, LSEC pin 5 */
+ "UART0_RTSB", /* GPIO_48, LSEC pin 9 */
+ "UART0_CTSB", /* GPIO_49, LSEC pin 3 */
+ "I2C4_SCLK", /* GPIO_50, HSEC pin 32 */
+ "I2C4_SDATA", /* GPIO_51, HSEC pin 34 */
+ "I2C0_SCLK", /* GPIO_52 */
+ "I2C0_SDATA", /* GPIO_53 */
+ "I2C1_SCLK", /* GPIO_54, LSEC pin 15 */
+ "I2C1_SDATA", /* GPIO_55, LSEC pin 17 */
+ "I2C2_SCLK", /* GPIO_56, LSEC pin 19 */
+ "I2C2_SDATA", /* GPIO_57, LSEC pin 21 */
+ "CSI0_DN0", /* GPIO_58, HSEC pin 10 */
+ "CSI0_DP0", /* GPIO_59, HSEC pin 8 */
+ "CSI0_DN1", /* GPIO_60, HSEC pin 16 */
+ "CSI0_DP1", /* GPIO_61, HSEC pin 14 */
+ "CSI0_CN", /* GPIO_62, HSEC pin 4 */
+ "CSI0_CP", /* GPIO_63, HSEC pin 2 */
+ "CSI0_DN2", /* GPIO_64, HSEC pin 22 */
+ "CSI0_DP2", /* GPIO_65, HSEC pin 20 */
+ "CSI0_DN3", /* GPIO_66, HSEC pin 28 */
+ "CSI0_DP3", /* GPIO_67, HSEC pin 26 */
+ "[CLK0]", /* GPIO_68, HSEC pin 15 */
+ "CSI1_DN0", /* GPIO_69, HSEC pin 44 */
+ "CSI1_DP0", /* GPIO_70, HSEC pin 42 */
+ "CSI1_DN1", /* GPIO_71, HSEC pin 50 */
+ "CSI1_DP1", /* GPIO_72, HSEC pin 48 */
+ "CSI1_CN", /* GPIO_73, HSEC pin 56 */
+ "CSI1_CP", /* GPIO_74, HSEC pin 54 */
+ "[CLK1]", /* GPIO_75, HSEC pin 17 */
+ "[GPIOD0]", /* GPIO_76 */
+ "[GPIOD1]", /* GPIO_77 */
+ "BT_RST_N", /* GPIO_78 */
+ "EXT_DC_EN", /* GPIO_79 */
+ "[PCM_DI]", /* GPIO_80, LSEC pin 22 */
+ "[PCM_DO]", /* GPIO_81, LSEC pin 20 */
+ "[PCM_CLK]", /* GPIO_82, LSEC pin 18 */
+ "[PCM_FS]", /* GPIO_83, LSEC pin 16 */
+ "WAKE_BT", /* GPIO_84 */
+ "WL_REG_ON", /* GPIO_85 */
+ "NC", /* GPIO_86 */
+ "NC", /* GPIO_87 */
+ "NC", /* GPIO_88 */
+ "NC", /* GPIO_89 */
+ "NC", /* GPIO_90 */
+ "WIFI_WAKE", /* GPIO_91 */
+ "BT_WAKE", /* GPIO_92 */
+ "NC", /* GPIO_93 */
+ "OTG_EN2", /* GPIO_94 */
+ "OTG_EN", /* GPIO_95 */
+ "DSI_DP3", /* GPIO_96, HSEC pin 45 */
+ "DSI_DN3", /* GPIO_97, HSEC pin 47 */
+ "DSI_DP1", /* GPIO_98, HSEC pin 33 */
+ "DSI_DN1", /* GPIO_99, HSEC pin 35 */
+ "DSI_CP", /* GPIO_100, HSEC pin 21 */
+ "DSI_CN", /* GPIO_101, HSEC pin 23 */
+ "DSI_DP0", /* GPIO_102, HSEC pin 27 */
+ "DSI_DN0", /* GPIO_103, HSEC pin 29 */
+ "DSI_DP2", /* GPIO_104, HSEC pin 39 */
+ "DSI_DN2", /* GPIO_105, HSEC pin 41 */
+ "N0_D0", /* GPIO_106 */
+ "N0_D1", /* GPIO_107 */
+ "N0_D2", /* GPIO_108 */
+ "N0_D3", /* GPIO_109 */
+ "N0_D4", /* GPIO_110 */
+ "N0_D5", /* GPIO_111 */
+ "N0_D6", /* GPIO_112 */
+ "N0_D7", /* GPIO_113 */
+ "N0_DQS", /* GPIO_114 */
+ "N0_DQSN", /* GPIO_115 */
+ "NC", /* GPIO_116 */
+ "NC", /* GPIO_117 */
+ "NC", /* GPIO_118 */
+ "N0_CEB1", /* GPIO_119 */
+ "CARD_DT", /* GPIO_120 */
+ "N0_CEB3", /* GPIO_121 */
+ "SD_DAT0", /* GPIO_122, HSEC pin 1 */
+ "SD_DAT1", /* GPIO_123, HSEC pin 3 */
+ "SD_DAT2", /* GPIO_124, HSEC pin 5 */
+ "SD_DAT3", /* GPIO_125, HSEC pin 7 */
+ "NC", /* GPIO_126 */
+ "NC", /* GPIO_127 */
+ "[PWR_BTN_N]", /* GPIO_128, LSEC pin 4 */
+ "[RST_BTN_N]", /* GPIO_129, LSEC pin 6 */
+ "NC", /* GPIO_130 */
+ "SD_CMD", /* GPIO_131 */
+ "GPIO-L", /* GPIO_132, LSEC pin 34 */
+ "GPIO-K", /* GPIO_133, LSEC pin 33 */
+ "NC", /* GPIO_134 */
+ "SD_SCLK", /* GPIO_135 */
+ "NC", /* GPIO_136 */
+ "JTAG_TRST", /* GPIO_137 */
+ "I2C3_SCLK", /* GPIO_138 */
+ "LED2", /* GPIO_139 */
+ "LED3", /* GPIO_140 */
+ "I2C3_SDATA", /* GPIO_141 */
+ "UART3_RX", /* GPIO_142 */
+ "UART3_TX", /* GPIO_143 */
+ "UART3_RTSB", /* GPIO_144 */
+ "UART3_CTSB"; /* GPIO_145 */
+};
--
2.14.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCH 4/5] pinctrl: actions: Add gpio support for Actions S900 SoC
2018-05-18 2:30 [PATCH 0/5] Add gpio support for Action Semi S900 SoC Manivannan Sadhasivam
` (2 preceding siblings ...)
2018-05-18 2:30 ` [PATCH 3/5] arm64: dts: actions: Add gpio line names to Bubblegum-96 board Manivannan Sadhasivam
@ 2018-05-18 2:30 ` Manivannan Sadhasivam
2018-05-18 21:43 ` Andy Shevchenko
2018-05-19 9:18 ` Christian Lamparter
2018-05-18 2:30 ` [PATCH 5/5] MAINTAINERS: Add Actions Semi S900 pinctrl entries Manivannan Sadhasivam
4 siblings, 2 replies; 9+ messages in thread
From: Manivannan Sadhasivam @ 2018-05-18 2:30 UTC (permalink / raw)
To: linus.walleij, robh+dt, afaerber
Cc: liuwei, mp-cs, 96boards, devicetree, andy.shevchenko,
daniel.thompson, amit.kucheria, linux-arm-kernel, linux-gpio,
linux-kernel, hzhang, bdong, manivannanece23,
Manivannan Sadhasivam
Add gpio support to pinctrl driver for Actions Semi S900 SoC.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
drivers/pinctrl/actions/Kconfig | 1 +
drivers/pinctrl/actions/pinctrl-owl.c | 206 +++++++++++++++++++++++++++++++++
drivers/pinctrl/actions/pinctrl-owl.h | 20 ++++
drivers/pinctrl/actions/pinctrl-s900.c | 29 ++++-
4 files changed, 255 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/actions/Kconfig b/drivers/pinctrl/actions/Kconfig
index ede97cdbbc12..490927b4ea76 100644
--- a/drivers/pinctrl/actions/Kconfig
+++ b/drivers/pinctrl/actions/Kconfig
@@ -4,6 +4,7 @@ config PINCTRL_OWL
select PINMUX
select PINCONF
select GENERIC_PINCONF
+ select GPIOLIB
help
Say Y here to enable Actions Semi OWL pinctrl driver
diff --git a/drivers/pinctrl/actions/pinctrl-owl.c b/drivers/pinctrl/actions/pinctrl-owl.c
index ee090697b1e9..4942e34c8b76 100644
--- a/drivers/pinctrl/actions/pinctrl-owl.c
+++ b/drivers/pinctrl/actions/pinctrl-owl.c
@@ -11,6 +11,7 @@
#include <linux/clk.h>
#include <linux/err.h>
+#include <linux/gpio/driver.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
@@ -31,6 +32,7 @@
* struct owl_pinctrl - pinctrl state of the device
* @dev: device handle
* @pctrldev: pinctrl handle
+ * @chip: gpio chip
* @lock: spinlock to protect registers
* @soc: reference to soc_data
* @base: pinctrl register base address
@@ -38,6 +40,7 @@
struct owl_pinctrl {
struct device *dev;
struct pinctrl_dev *pctrldev;
+ struct gpio_chip chip;
raw_spinlock_t lock;
struct clk *clk;
const struct owl_pinctrl_soc_data *soc;
@@ -536,6 +539,198 @@ static struct pinctrl_desc owl_pinctrl_desc = {
.owner = THIS_MODULE,
};
+static const struct owl_gpio_port *
+owl_gpio_get_port(struct owl_pinctrl *pctrl, unsigned int *pin)
+{
+ unsigned int start = 0, i;
+
+ for (i = 0; i < pctrl->soc->nports; i++) {
+ const struct owl_gpio_port *port = &pctrl->soc->ports[i];
+
+ if (*pin >= start && *pin < start + port->pins) {
+ *pin -= start;
+ return port;
+ }
+
+ start += port->pins;
+ }
+
+ return NULL;
+}
+
+static void owl_gpio_update_reg(void __iomem *base, unsigned int pin, int flag)
+{
+ u32 val;
+
+ val = readl_relaxed(base);
+
+ if (flag)
+ val |= BIT(pin);
+ else
+ val &= ~BIT(pin);
+
+ writel_relaxed(val, base);
+}
+
+static int owl_gpio_request(struct gpio_chip *chip, unsigned int offset)
+{
+ struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
+ const struct owl_gpio_port *port;
+ void __iomem *gpio_base;
+ unsigned long flags;
+
+ port = owl_gpio_get_port(pctrl, &offset);
+ if (WARN_ON(port == NULL))
+ return -ENODEV;
+
+ gpio_base = pctrl->base + port->offset;
+
+ /*
+ * GPIOs have higher priority over other modules, so either setting
+ * them as OUT or IN is sufficient
+ */
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ owl_gpio_update_reg(gpio_base + port->outen, offset, true);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return 0;
+}
+
+static void owl_gpio_free(struct gpio_chip *chip, unsigned int offset)
+{
+ struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
+ const struct owl_gpio_port *port;
+ void __iomem *gpio_base;
+ unsigned long flags;
+
+ port = owl_gpio_get_port(pctrl, &offset);
+ if (WARN_ON(port == NULL))
+ return;
+
+ gpio_base = pctrl->base + port->offset;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ /* disable gpio output */
+ owl_gpio_update_reg(gpio_base + port->outen, offset, false);
+
+ /* disable gpio input */
+ owl_gpio_update_reg(gpio_base + port->inen, offset, false);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+static int owl_gpio_get(struct gpio_chip *chip, unsigned int offset)
+{
+ struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
+ const struct owl_gpio_port *port;
+ void __iomem *gpio_base;
+ unsigned long flags;
+ u32 val;
+
+ port = owl_gpio_get_port(pctrl, &offset);
+ if (WARN_ON(port == NULL))
+ return -ENODEV;
+
+ gpio_base = pctrl->base + port->offset;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ val = readl_relaxed(gpio_base + port->dat);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return !!(val & BIT(offset));
+}
+
+static void owl_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
+{
+ struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
+ const struct owl_gpio_port *port;
+ void __iomem *gpio_base;
+ unsigned long flags;
+
+ port = owl_gpio_get_port(pctrl, &offset);
+ if (WARN_ON(port == NULL))
+ return;
+
+ gpio_base = pctrl->base + port->offset;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ owl_gpio_update_reg(gpio_base + port->dat, offset, value);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+}
+
+static int owl_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
+{
+ struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
+ const struct owl_gpio_port *port;
+ void __iomem *gpio_base;
+ unsigned long flags;
+
+ port = owl_gpio_get_port(pctrl, &offset);
+ if (WARN_ON(port == NULL))
+ return -ENODEV;
+
+ gpio_base = pctrl->base + port->offset;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ owl_gpio_update_reg(gpio_base + port->outen, offset, false);
+ owl_gpio_update_reg(gpio_base + port->inen, offset, true);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return 0;
+}
+
+static int owl_gpio_direction_output(struct gpio_chip *chip,
+ unsigned int offset, int value)
+{
+ struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
+ const struct owl_gpio_port *port;
+ void __iomem *gpio_base;
+ unsigned long flags;
+
+ port = owl_gpio_get_port(pctrl, &offset);
+ if (WARN_ON(port == NULL))
+ return -ENODEV;
+
+ gpio_base = pctrl->base + port->offset;
+
+ raw_spin_lock_irqsave(&pctrl->lock, flags);
+ owl_gpio_update_reg(gpio_base + port->inen, offset, false);
+ owl_gpio_update_reg(gpio_base + port->outen, offset, true);
+ owl_gpio_update_reg(gpio_base + port->dat, offset, value);
+ raw_spin_unlock_irqrestore(&pctrl->lock, flags);
+
+ return 0;
+}
+
+static int owl_gpio_init(struct owl_pinctrl *pctrl)
+{
+ struct gpio_chip *chip;
+ int ret;
+
+ chip = &pctrl->chip;
+ chip->base = -1;
+ chip->ngpio = pctrl->soc->ngpios;
+ chip->label = dev_name(pctrl->dev);
+ chip->parent = pctrl->dev;
+ chip->owner = THIS_MODULE;
+ chip->of_node = pctrl->dev->of_node;
+
+ ret = gpiochip_add_data(&pctrl->chip, pctrl);
+ if (ret) {
+ dev_err(pctrl->dev, "failed to register gpiochip\n");
+ return ret;
+ }
+
+ ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev),
+ 0, 0, chip->ngpio);
+ if (ret) {
+ dev_err(pctrl->dev, "failed to add pin range\n");
+ gpiochip_remove(&pctrl->chip);
+ return ret;
+ }
+
+ return 0;
+}
+
int owl_pinctrl_probe(struct platform_device *pdev,
struct owl_pinctrl_soc_data *soc_data)
{
@@ -571,6 +766,13 @@ int owl_pinctrl_probe(struct platform_device *pdev,
owl_pinctrl_desc.pins = soc_data->pins;
owl_pinctrl_desc.npins = soc_data->npins;
+ pctrl->chip.direction_input = owl_gpio_direction_input;
+ pctrl->chip.direction_output = owl_gpio_direction_output;
+ pctrl->chip.get = owl_gpio_get;
+ pctrl->chip.set = owl_gpio_set;
+ pctrl->chip.request = owl_gpio_request;
+ pctrl->chip.free = owl_gpio_free;
+
pctrl->soc = soc_data;
pctrl->dev = &pdev->dev;
@@ -581,6 +783,10 @@ int owl_pinctrl_probe(struct platform_device *pdev,
return PTR_ERR(pctrl->pctrldev);
}
+ ret = owl_gpio_init(pctrl);
+ if (ret)
+ return ret;
+
platform_set_drvdata(pdev, pctrl);
return 0;
diff --git a/drivers/pinctrl/actions/pinctrl-owl.h b/drivers/pinctrl/actions/pinctrl-owl.h
index 448f81a6db3b..74342378937c 100644
--- a/drivers/pinctrl/actions/pinctrl-owl.h
+++ b/drivers/pinctrl/actions/pinctrl-owl.h
@@ -114,6 +114,22 @@ struct owl_pinmux_func {
unsigned int ngroups;
};
+/**
+ * struct owl_gpio_port - Actions GPIO port info
+ * @offset: offset of the GPIO port.
+ * @pins: number of pins belongs to the GPIO port.
+ * @outen: offset of the output enable register.
+ * @inen: offset of the input enable register.
+ * @dat: offset of the data register.
+ */
+struct owl_gpio_port {
+ unsigned int offset;
+ unsigned int pins;
+ unsigned int outen;
+ unsigned int inen;
+ unsigned int dat;
+};
+
/**
* struct owl_pinctrl_soc_data - Actions pin controller driver configuration
* @pins: array describing all pins of the pin controller.
@@ -124,6 +140,8 @@ struct owl_pinmux_func {
* @ngroups: number of entries in @groups.
* @padinfo: array describing the pad info of this SoC.
* @ngpios: number of pingroups the driver should expose as GPIOs.
+ * @port: array describing all GPIO ports of this SoC.
+ * @nports: number of GPIO ports in this SoC.
*/
struct owl_pinctrl_soc_data {
const struct pinctrl_pin_desc *pins;
@@ -134,6 +152,8 @@ struct owl_pinctrl_soc_data {
unsigned int ngroups;
const struct owl_padinfo *padinfo;
unsigned int ngpios;
+ const struct owl_gpio_port *ports;
+ unsigned int nports;
};
int owl_pinctrl_probe(struct platform_device *pdev,
diff --git a/drivers/pinctrl/actions/pinctrl-s900.c b/drivers/pinctrl/actions/pinctrl-s900.c
index 08d93f8fc086..5503c7945764 100644
--- a/drivers/pinctrl/actions/pinctrl-s900.c
+++ b/drivers/pinctrl/actions/pinctrl-s900.c
@@ -33,6 +33,13 @@
#define PAD_SR1 (0x0274)
#define PAD_SR2 (0x0278)
+#define OWL_GPIO_PORT_A 0
+#define OWL_GPIO_PORT_B 1
+#define OWL_GPIO_PORT_C 2
+#define OWL_GPIO_PORT_D 3
+#define OWL_GPIO_PORT_E 4
+#define OWL_GPIO_PORT_F 5
+
#define _GPIOA(offset) (offset)
#define _GPIOB(offset) (32 + (offset))
#define _GPIOC(offset) (64 + (offset))
@@ -1814,6 +1821,24 @@ static struct owl_padinfo s900_padinfo[NUM_PADS] = {
[SGPIO3] = PAD_INFO_PULLCTL_ST(SGPIO3)
};
+#define OWL_GPIO_PORT(port, base, count, _outen, _inen, _dat) \
+ [OWL_GPIO_PORT_##port] = { \
+ .offset = base, \
+ .pins = count, \
+ .outen = _outen, \
+ .inen = _inen, \
+ .dat = _dat, \
+ }
+
+static const struct owl_gpio_port s900_gpio_ports[] = {
+ OWL_GPIO_PORT(A, 0x0000, 32, 0x0, 0x4, 0x8),
+ OWL_GPIO_PORT(B, 0x000C, 32, 0x0, 0x4, 0x8),
+ OWL_GPIO_PORT(C, 0x0018, 12, 0x0, 0x4, 0x8),
+ OWL_GPIO_PORT(D, 0x0024, 30, 0x0, 0x4, 0x8),
+ OWL_GPIO_PORT(E, 0x0030, 32, 0x0, 0x4, 0x8),
+ OWL_GPIO_PORT(F, 0x00F0, 8, 0x0, 0x4, 0x8)
+};
+
static struct owl_pinctrl_soc_data s900_pinctrl_data = {
.padinfo = s900_padinfo,
.pins = (const struct pinctrl_pin_desc *)s900_pads,
@@ -1822,7 +1847,9 @@ static struct owl_pinctrl_soc_data s900_pinctrl_data = {
.nfunctions = ARRAY_SIZE(s900_functions),
.groups = s900_groups,
.ngroups = ARRAY_SIZE(s900_groups),
- .ngpios = NUM_GPIOS
+ .ngpios = NUM_GPIOS,
+ .ports = s900_gpio_ports,
+ .nports = ARRAY_SIZE(s900_gpio_ports)
};
static int s900_pinctrl_probe(struct platform_device *pdev)
--
2.14.1
^ permalink raw reply related [flat|nested] 9+ messages in thread* Re: [PATCH 4/5] pinctrl: actions: Add gpio support for Actions S900 SoC
2018-05-18 2:30 ` [PATCH 4/5] pinctrl: actions: Add gpio support for Actions S900 SoC Manivannan Sadhasivam
@ 2018-05-18 21:43 ` Andy Shevchenko
2018-05-19 9:18 ` Christian Lamparter
1 sibling, 0 replies; 9+ messages in thread
From: Andy Shevchenko @ 2018-05-18 21:43 UTC (permalink / raw)
To: Manivannan Sadhasivam
Cc: Linus Walleij, Rob Herring, Andreas Färber, 刘炜,
mp-cs, 96boards, devicetree, Daniel Thompson, amit.kucheria,
linux-arm Mailing List, open list:GPIO SUBSYSTEM,
Linux Kernel Mailing List, hzhang, bdong, Mani Sadhasivam
On Fri, May 18, 2018 at 5:30 AM, Manivannan Sadhasivam
<manivannan.sadhasivam@linaro.org> wrote:
> Add gpio support to pinctrl driver for Actions Semi S900 SoC.
>
LGTM,
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
> drivers/pinctrl/actions/Kconfig | 1 +
> drivers/pinctrl/actions/pinctrl-owl.c | 206 +++++++++++++++++++++++++++++++++
> drivers/pinctrl/actions/pinctrl-owl.h | 20 ++++
> drivers/pinctrl/actions/pinctrl-s900.c | 29 ++++-
> 4 files changed, 255 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pinctrl/actions/Kconfig b/drivers/pinctrl/actions/Kconfig
> index ede97cdbbc12..490927b4ea76 100644
> --- a/drivers/pinctrl/actions/Kconfig
> +++ b/drivers/pinctrl/actions/Kconfig
> @@ -4,6 +4,7 @@ config PINCTRL_OWL
> select PINMUX
> select PINCONF
> select GENERIC_PINCONF
> + select GPIOLIB
> help
> Say Y here to enable Actions Semi OWL pinctrl driver
>
> diff --git a/drivers/pinctrl/actions/pinctrl-owl.c b/drivers/pinctrl/actions/pinctrl-owl.c
> index ee090697b1e9..4942e34c8b76 100644
> --- a/drivers/pinctrl/actions/pinctrl-owl.c
> +++ b/drivers/pinctrl/actions/pinctrl-owl.c
> @@ -11,6 +11,7 @@
>
> #include <linux/clk.h>
> #include <linux/err.h>
> +#include <linux/gpio/driver.h>
> #include <linux/io.h>
> #include <linux/module.h>
> #include <linux/of.h>
> @@ -31,6 +32,7 @@
> * struct owl_pinctrl - pinctrl state of the device
> * @dev: device handle
> * @pctrldev: pinctrl handle
> + * @chip: gpio chip
> * @lock: spinlock to protect registers
> * @soc: reference to soc_data
> * @base: pinctrl register base address
> @@ -38,6 +40,7 @@
> struct owl_pinctrl {
> struct device *dev;
> struct pinctrl_dev *pctrldev;
> + struct gpio_chip chip;
> raw_spinlock_t lock;
> struct clk *clk;
> const struct owl_pinctrl_soc_data *soc;
> @@ -536,6 +539,198 @@ static struct pinctrl_desc owl_pinctrl_desc = {
> .owner = THIS_MODULE,
> };
>
> +static const struct owl_gpio_port *
> +owl_gpio_get_port(struct owl_pinctrl *pctrl, unsigned int *pin)
> +{
> + unsigned int start = 0, i;
> +
> + for (i = 0; i < pctrl->soc->nports; i++) {
> + const struct owl_gpio_port *port = &pctrl->soc->ports[i];
> +
> + if (*pin >= start && *pin < start + port->pins) {
> + *pin -= start;
> + return port;
> + }
> +
> + start += port->pins;
> + }
> +
> + return NULL;
> +}
> +
> +static void owl_gpio_update_reg(void __iomem *base, unsigned int pin, int flag)
> +{
> + u32 val;
> +
> + val = readl_relaxed(base);
> +
> + if (flag)
> + val |= BIT(pin);
> + else
> + val &= ~BIT(pin);
> +
> + writel_relaxed(val, base);
> +}
> +
> +static int owl_gpio_request(struct gpio_chip *chip, unsigned int offset)
> +{
> + struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
> + const struct owl_gpio_port *port;
> + void __iomem *gpio_base;
> + unsigned long flags;
> +
> + port = owl_gpio_get_port(pctrl, &offset);
> + if (WARN_ON(port == NULL))
> + return -ENODEV;
> +
> + gpio_base = pctrl->base + port->offset;
> +
> + /*
> + * GPIOs have higher priority over other modules, so either setting
> + * them as OUT or IN is sufficient
> + */
> + raw_spin_lock_irqsave(&pctrl->lock, flags);
> + owl_gpio_update_reg(gpio_base + port->outen, offset, true);
> + raw_spin_unlock_irqrestore(&pctrl->lock, flags);
> +
> + return 0;
> +}
> +
> +static void owl_gpio_free(struct gpio_chip *chip, unsigned int offset)
> +{
> + struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
> + const struct owl_gpio_port *port;
> + void __iomem *gpio_base;
> + unsigned long flags;
> +
> + port = owl_gpio_get_port(pctrl, &offset);
> + if (WARN_ON(port == NULL))
> + return;
> +
> + gpio_base = pctrl->base + port->offset;
> +
> + raw_spin_lock_irqsave(&pctrl->lock, flags);
> + /* disable gpio output */
> + owl_gpio_update_reg(gpio_base + port->outen, offset, false);
> +
> + /* disable gpio input */
> + owl_gpio_update_reg(gpio_base + port->inen, offset, false);
> + raw_spin_unlock_irqrestore(&pctrl->lock, flags);
> +}
> +
> +static int owl_gpio_get(struct gpio_chip *chip, unsigned int offset)
> +{
> + struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
> + const struct owl_gpio_port *port;
> + void __iomem *gpio_base;
> + unsigned long flags;
> + u32 val;
> +
> + port = owl_gpio_get_port(pctrl, &offset);
> + if (WARN_ON(port == NULL))
> + return -ENODEV;
> +
> + gpio_base = pctrl->base + port->offset;
> +
> + raw_spin_lock_irqsave(&pctrl->lock, flags);
> + val = readl_relaxed(gpio_base + port->dat);
> + raw_spin_unlock_irqrestore(&pctrl->lock, flags);
> +
> + return !!(val & BIT(offset));
> +}
> +
> +static void owl_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
> +{
> + struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
> + const struct owl_gpio_port *port;
> + void __iomem *gpio_base;
> + unsigned long flags;
> +
> + port = owl_gpio_get_port(pctrl, &offset);
> + if (WARN_ON(port == NULL))
> + return;
> +
> + gpio_base = pctrl->base + port->offset;
> +
> + raw_spin_lock_irqsave(&pctrl->lock, flags);
> + owl_gpio_update_reg(gpio_base + port->dat, offset, value);
> + raw_spin_unlock_irqrestore(&pctrl->lock, flags);
> +}
> +
> +static int owl_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
> +{
> + struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
> + const struct owl_gpio_port *port;
> + void __iomem *gpio_base;
> + unsigned long flags;
> +
> + port = owl_gpio_get_port(pctrl, &offset);
> + if (WARN_ON(port == NULL))
> + return -ENODEV;
> +
> + gpio_base = pctrl->base + port->offset;
> +
> + raw_spin_lock_irqsave(&pctrl->lock, flags);
> + owl_gpio_update_reg(gpio_base + port->outen, offset, false);
> + owl_gpio_update_reg(gpio_base + port->inen, offset, true);
> + raw_spin_unlock_irqrestore(&pctrl->lock, flags);
> +
> + return 0;
> +}
> +
> +static int owl_gpio_direction_output(struct gpio_chip *chip,
> + unsigned int offset, int value)
> +{
> + struct owl_pinctrl *pctrl = gpiochip_get_data(chip);
> + const struct owl_gpio_port *port;
> + void __iomem *gpio_base;
> + unsigned long flags;
> +
> + port = owl_gpio_get_port(pctrl, &offset);
> + if (WARN_ON(port == NULL))
> + return -ENODEV;
> +
> + gpio_base = pctrl->base + port->offset;
> +
> + raw_spin_lock_irqsave(&pctrl->lock, flags);
> + owl_gpio_update_reg(gpio_base + port->inen, offset, false);
> + owl_gpio_update_reg(gpio_base + port->outen, offset, true);
> + owl_gpio_update_reg(gpio_base + port->dat, offset, value);
> + raw_spin_unlock_irqrestore(&pctrl->lock, flags);
> +
> + return 0;
> +}
> +
> +static int owl_gpio_init(struct owl_pinctrl *pctrl)
> +{
> + struct gpio_chip *chip;
> + int ret;
> +
> + chip = &pctrl->chip;
> + chip->base = -1;
> + chip->ngpio = pctrl->soc->ngpios;
> + chip->label = dev_name(pctrl->dev);
> + chip->parent = pctrl->dev;
> + chip->owner = THIS_MODULE;
> + chip->of_node = pctrl->dev->of_node;
> +
> + ret = gpiochip_add_data(&pctrl->chip, pctrl);
> + if (ret) {
> + dev_err(pctrl->dev, "failed to register gpiochip\n");
> + return ret;
> + }
> +
> + ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev),
> + 0, 0, chip->ngpio);
> + if (ret) {
> + dev_err(pctrl->dev, "failed to add pin range\n");
> + gpiochip_remove(&pctrl->chip);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> int owl_pinctrl_probe(struct platform_device *pdev,
> struct owl_pinctrl_soc_data *soc_data)
> {
> @@ -571,6 +766,13 @@ int owl_pinctrl_probe(struct platform_device *pdev,
> owl_pinctrl_desc.pins = soc_data->pins;
> owl_pinctrl_desc.npins = soc_data->npins;
>
> + pctrl->chip.direction_input = owl_gpio_direction_input;
> + pctrl->chip.direction_output = owl_gpio_direction_output;
> + pctrl->chip.get = owl_gpio_get;
> + pctrl->chip.set = owl_gpio_set;
> + pctrl->chip.request = owl_gpio_request;
> + pctrl->chip.free = owl_gpio_free;
> +
> pctrl->soc = soc_data;
> pctrl->dev = &pdev->dev;
>
> @@ -581,6 +783,10 @@ int owl_pinctrl_probe(struct platform_device *pdev,
> return PTR_ERR(pctrl->pctrldev);
> }
>
> + ret = owl_gpio_init(pctrl);
> + if (ret)
> + return ret;
> +
> platform_set_drvdata(pdev, pctrl);
>
> return 0;
> diff --git a/drivers/pinctrl/actions/pinctrl-owl.h b/drivers/pinctrl/actions/pinctrl-owl.h
> index 448f81a6db3b..74342378937c 100644
> --- a/drivers/pinctrl/actions/pinctrl-owl.h
> +++ b/drivers/pinctrl/actions/pinctrl-owl.h
> @@ -114,6 +114,22 @@ struct owl_pinmux_func {
> unsigned int ngroups;
> };
>
> +/**
> + * struct owl_gpio_port - Actions GPIO port info
> + * @offset: offset of the GPIO port.
> + * @pins: number of pins belongs to the GPIO port.
> + * @outen: offset of the output enable register.
> + * @inen: offset of the input enable register.
> + * @dat: offset of the data register.
> + */
> +struct owl_gpio_port {
> + unsigned int offset;
> + unsigned int pins;
> + unsigned int outen;
> + unsigned int inen;
> + unsigned int dat;
> +};
> +
> /**
> * struct owl_pinctrl_soc_data - Actions pin controller driver configuration
> * @pins: array describing all pins of the pin controller.
> @@ -124,6 +140,8 @@ struct owl_pinmux_func {
> * @ngroups: number of entries in @groups.
> * @padinfo: array describing the pad info of this SoC.
> * @ngpios: number of pingroups the driver should expose as GPIOs.
> + * @port: array describing all GPIO ports of this SoC.
> + * @nports: number of GPIO ports in this SoC.
> */
> struct owl_pinctrl_soc_data {
> const struct pinctrl_pin_desc *pins;
> @@ -134,6 +152,8 @@ struct owl_pinctrl_soc_data {
> unsigned int ngroups;
> const struct owl_padinfo *padinfo;
> unsigned int ngpios;
> + const struct owl_gpio_port *ports;
> + unsigned int nports;
> };
>
> int owl_pinctrl_probe(struct platform_device *pdev,
> diff --git a/drivers/pinctrl/actions/pinctrl-s900.c b/drivers/pinctrl/actions/pinctrl-s900.c
> index 08d93f8fc086..5503c7945764 100644
> --- a/drivers/pinctrl/actions/pinctrl-s900.c
> +++ b/drivers/pinctrl/actions/pinctrl-s900.c
> @@ -33,6 +33,13 @@
> #define PAD_SR1 (0x0274)
> #define PAD_SR2 (0x0278)
>
> +#define OWL_GPIO_PORT_A 0
> +#define OWL_GPIO_PORT_B 1
> +#define OWL_GPIO_PORT_C 2
> +#define OWL_GPIO_PORT_D 3
> +#define OWL_GPIO_PORT_E 4
> +#define OWL_GPIO_PORT_F 5
> +
> #define _GPIOA(offset) (offset)
> #define _GPIOB(offset) (32 + (offset))
> #define _GPIOC(offset) (64 + (offset))
> @@ -1814,6 +1821,24 @@ static struct owl_padinfo s900_padinfo[NUM_PADS] = {
> [SGPIO3] = PAD_INFO_PULLCTL_ST(SGPIO3)
> };
>
> +#define OWL_GPIO_PORT(port, base, count, _outen, _inen, _dat) \
> + [OWL_GPIO_PORT_##port] = { \
> + .offset = base, \
> + .pins = count, \
> + .outen = _outen, \
> + .inen = _inen, \
> + .dat = _dat, \
> + }
> +
> +static const struct owl_gpio_port s900_gpio_ports[] = {
> + OWL_GPIO_PORT(A, 0x0000, 32, 0x0, 0x4, 0x8),
> + OWL_GPIO_PORT(B, 0x000C, 32, 0x0, 0x4, 0x8),
> + OWL_GPIO_PORT(C, 0x0018, 12, 0x0, 0x4, 0x8),
> + OWL_GPIO_PORT(D, 0x0024, 30, 0x0, 0x4, 0x8),
> + OWL_GPIO_PORT(E, 0x0030, 32, 0x0, 0x4, 0x8),
> + OWL_GPIO_PORT(F, 0x00F0, 8, 0x0, 0x4, 0x8)
> +};
> +
> static struct owl_pinctrl_soc_data s900_pinctrl_data = {
> .padinfo = s900_padinfo,
> .pins = (const struct pinctrl_pin_desc *)s900_pads,
> @@ -1822,7 +1847,9 @@ static struct owl_pinctrl_soc_data s900_pinctrl_data = {
> .nfunctions = ARRAY_SIZE(s900_functions),
> .groups = s900_groups,
> .ngroups = ARRAY_SIZE(s900_groups),
> - .ngpios = NUM_GPIOS
> + .ngpios = NUM_GPIOS,
> + .ports = s900_gpio_ports,
> + .nports = ARRAY_SIZE(s900_gpio_ports)
> };
>
> static int s900_pinctrl_probe(struct platform_device *pdev)
> --
> 2.14.1
>
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH 4/5] pinctrl: actions: Add gpio support for Actions S900 SoC
2018-05-18 2:30 ` [PATCH 4/5] pinctrl: actions: Add gpio support for Actions S900 SoC Manivannan Sadhasivam
2018-05-18 21:43 ` Andy Shevchenko
@ 2018-05-19 9:18 ` Christian Lamparter
2018-05-19 10:11 ` Manivannan Sadhasivam
1 sibling, 1 reply; 9+ messages in thread
From: Christian Lamparter @ 2018-05-19 9:18 UTC (permalink / raw)
To: Manivannan Sadhasivam
Cc: linus.walleij, robh+dt, afaerber, liuwei, mp-cs, 96boards,
devicetree, andy.shevchenko, daniel.thompson, amit.kucheria,
linux-arm-kernel, linux-gpio, linux-kernel, hzhang, bdong,
manivannanece23
On Friday, May 18, 2018 4:30:55 AM CEST Manivannan Sadhasivam wrote:
> Add gpio support to pinctrl driver for Actions Semi S900 SoC.
>
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> ---
> [...]
> +static int owl_gpio_init(struct owl_pinctrl *pctrl)
> +{
> + struct gpio_chip *chip;
> + int ret;
> +
> + chip = &pctrl->chip;
> + chip->base = -1;
> + chip->ngpio = pctrl->soc->ngpios;
> + chip->label = dev_name(pctrl->dev);
> + chip->parent = pctrl->dev;
> + chip->owner = THIS_MODULE;
> + chip->of_node = pctrl->dev->of_node;
> +
> + ret = gpiochip_add_data(&pctrl->chip, pctrl);
> + if (ret) {
> + dev_err(pctrl->dev, "failed to register gpiochip\n");
> + return ret;
> + }
> +
> + ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev),
> + 0, 0, chip->ngpio);
> + if (ret) {
> + dev_err(pctrl->dev, "failed to add pin range\n");
> + gpiochip_remove(&pctrl->chip);
> + return ret;
> + }
> +
gpiochip_add_pin_range()? That's not going to work with gpio-hogs.
But, you can easily test this. Just add a gpio-hog [0]
( Section 2. gpio-controller nodes) into the Devicetree's
pinctrl node.
something like: (No idea if GPIO1 is already used, but any free
gpio will do)
| [...]
| pinctrl@e01b0000 {
| compatible = "actions,s900-pinctrl";
| reg = <0x0 0xe01b0000 0x0 0x1000>;
| clocks = <&cmu CLK_GPIO>;
| gpio-controller;
| #gpio-cells = <2>;
|
| line_b {
| gpio-hog;
| gpios = <1 GPIO_ACTIVE_HIGH>;
| output-low;
| line-name = "foo-bar-gpio";
| };
| };
The pinctrl probe will fail. You can fix this by
replacing the gpiochip_add_pin_range() and use
the gpio-ranges [0] property to define the range.
[0] <https://www.kernel.org/doc/Documentation/devicetree/bindings/gpio/gpio.txt>
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH 4/5] pinctrl: actions: Add gpio support for Actions S900 SoC
2018-05-19 9:18 ` Christian Lamparter
@ 2018-05-19 10:11 ` Manivannan Sadhasivam
0 siblings, 0 replies; 9+ messages in thread
From: Manivannan Sadhasivam @ 2018-05-19 10:11 UTC (permalink / raw)
To: Christian Lamparter
Cc: linus.walleij, robh+dt, afaerber, liuwei, mp-cs, 96boards,
devicetree, andy.shevchenko, daniel.thompson, amit.kucheria,
linux-arm-kernel, linux-gpio, linux-kernel, hzhang, bdong,
manivannanece23
Hi Christian,
On Sat, May 19, 2018 at 11:18:53AM +0200, Christian Lamparter wrote:
> On Friday, May 18, 2018 4:30:55 AM CEST Manivannan Sadhasivam wrote:
> > Add gpio support to pinctrl driver for Actions Semi S900 SoC.
> >
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
> > ---
> > [...]
> > +static int owl_gpio_init(struct owl_pinctrl *pctrl)
> > +{
> > + struct gpio_chip *chip;
> > + int ret;
> > +
> > + chip = &pctrl->chip;
> > + chip->base = -1;
> > + chip->ngpio = pctrl->soc->ngpios;
> > + chip->label = dev_name(pctrl->dev);
> > + chip->parent = pctrl->dev;
> > + chip->owner = THIS_MODULE;
> > + chip->of_node = pctrl->dev->of_node;
> > +
> > + ret = gpiochip_add_data(&pctrl->chip, pctrl);
> > + if (ret) {
> > + dev_err(pctrl->dev, "failed to register gpiochip\n");
> > + return ret;
> > + }
> > +
> > + ret = gpiochip_add_pin_range(&pctrl->chip, dev_name(pctrl->dev),
> > + 0, 0, chip->ngpio);
> > + if (ret) {
> > + dev_err(pctrl->dev, "failed to add pin range\n");
> > + gpiochip_remove(&pctrl->chip);
> > + return ret;
> > + }
> > +
> gpiochip_add_pin_range()? That's not going to work with gpio-hogs.
>
Hmmm. Just looked into the gpio-hog mechanism and the patch you have
implemented for MSM driver. I agree with you on replacing
gpiochip_add_pin_range() with gpio-ranges property. But I'm curious
whether we should document it somewhere or not (probably in [1]).
Anyway I will send the v2 incorporating your suggestion.
Thanks,
Mani
[1] Documentation/devicetree/bindings/gpio/gpio.txt
> But, you can easily test this. Just add a gpio-hog [0]
> ( Section 2. gpio-controller nodes) into the Devicetree's
> pinctrl node.
>
> something like: (No idea if GPIO1 is already used, but any free
> gpio will do)
> | [...]
> | pinctrl@e01b0000 {
> | compatible = "actions,s900-pinctrl";
> | reg = <0x0 0xe01b0000 0x0 0x1000>;
> | clocks = <&cmu CLK_GPIO>;
> | gpio-controller;
> | #gpio-cells = <2>;
> |
> | line_b {
> | gpio-hog;
> | gpios = <1 GPIO_ACTIVE_HIGH>;
> | output-low;
> | line-name = "foo-bar-gpio";
> | };
> | };
>
> The pinctrl probe will fail. You can fix this by
> replacing the gpiochip_add_pin_range() and use
> the gpio-ranges [0] property to define the range.
>
> [0] <https://www.kernel.org/doc/Documentation/devicetree/bindings/gpio/gpio.txt>
>
>
>
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH 5/5] MAINTAINERS: Add Actions Semi S900 pinctrl entries
2018-05-18 2:30 [PATCH 0/5] Add gpio support for Action Semi S900 SoC Manivannan Sadhasivam
` (3 preceding siblings ...)
2018-05-18 2:30 ` [PATCH 4/5] pinctrl: actions: Add gpio support for Actions S900 SoC Manivannan Sadhasivam
@ 2018-05-18 2:30 ` Manivannan Sadhasivam
4 siblings, 0 replies; 9+ messages in thread
From: Manivannan Sadhasivam @ 2018-05-18 2:30 UTC (permalink / raw)
To: linus.walleij, robh+dt, afaerber
Cc: liuwei, mp-cs, 96boards, devicetree, andy.shevchenko,
daniel.thompson, amit.kucheria, linux-arm-kernel, linux-gpio,
linux-kernel, hzhang, bdong, manivannanece23,
Manivannan Sadhasivam
Add S900 pinctrl entries under ARCH_ACTIONS
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
MAINTAINERS | 2 ++
1 file changed, 2 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 640dabc4c311..9e1a17c9b4a7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1125,10 +1125,12 @@ F: arch/arm/mach-actions/
F: arch/arm/boot/dts/owl-*
F: arch/arm64/boot/dts/actions/
F: drivers/clocksource/owl-*
+F: drivers/pinctrl/actions/*
F: drivers/soc/actions/
F: include/dt-bindings/power/owl-*
F: include/linux/soc/actions/
F: Documentation/devicetree/bindings/arm/actions.txt
+F: Documentation/devicetree/bindings/pinctrl/actions,s900-pinctrl.txt
F: Documentation/devicetree/bindings/power/actions,owl-sps.txt
F: Documentation/devicetree/bindings/timer/actions,owl-timer.txt
--
2.14.1
^ permalink raw reply related [flat|nested] 9+ messages in thread