Samsung GPIO updates

Samsung GPIO updates

[Ben Dooks]

This is the current contents of next-samsung-gpio1, which contains
the Kukjin moves for supporting common gpio code and the s5p6440
updates which have already been on the list.

Also contains my moves to get the common gpio code and gpio-pm code
into plat-samsung.

[PATCH] ARM: SAMSUNG: Move GPIO common functions to plat-samsung

[Ben Dooks]

From: Kukjin Kim <kgene.kim@samsung.com>

This patch moves GPIO common functions (from plat-s3c64xx) into plat-samsung.
and adds the config option to build the plat-samsung/gpiolib for Samsung SoCs.

Signed-off-by: Adityapratap Sharma <aditya.ps@samsung.com>
Signed-off-by: Atul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
[ben-linux at fluff.org: remove uncessary changelogs from internal dev]
[ben-linux at fluff.org: fix aditya's email address and shorten title]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---
 arch/arm/plat-s3c/include/plat/gpio-core.h |    3 +
 arch/arm/plat-s3c64xx/Kconfig              |    1 +
 arch/arm/plat-s3c64xx/gpiolib.c            |  162 +----------------------
 arch/arm/plat-samsung/Kconfig              |    7 +
 arch/arm/plat-samsung/Makefile             |    1 +
 arch/arm/plat-samsung/gpiolib.c            |  202 ++++++++++++++++++++++++++++
 6 files changed, 216 insertions(+), 160 deletions(-)
 create mode 100644 arch/arm/plat-samsung/gpiolib.c

diff --git a/arch/arm/plat-s3c/include/plat/gpio-core.h b/arch/arm/plat-s3c/include/plat/gpio-core.h
index 32af612..92c3829 100644
--- a/arch/arm/plat-s3c/include/plat/gpio-core.h
+++ b/arch/arm/plat-s3c/include/plat/gpio-core.h
@@ -80,6 +80,9 @@ extern void s3c_gpiolib_add(struct s3c_gpio_chip *chip);
  * and any other necessary functions.
  */
 
+extern void samsung_gpiolib_add_4bit(struct s3c_gpio_chip *chip);
+extern void samsung_gpiolib_add_4bit2(struct s3c_gpio_chip *chip);
+
 #ifdef CONFIG_S3C_GPIO_TRACK
 extern struct s3c_gpio_chip *s3c_gpios[S3C_GPIO_END];
 
diff --git a/arch/arm/plat-s3c64xx/Kconfig b/arch/arm/plat-s3c64xx/Kconfig
index 0fba1f9..b0808f7 100644
--- a/arch/arm/plat-s3c64xx/Kconfig
+++ b/arch/arm/plat-s3c64xx/Kconfig
@@ -22,6 +22,7 @@ config PLAT_S3C64XX
 	select S3C_GPIO_CFG_S3C64XX
 	select S3C_DEV_NAND
 	select USB_ARCH_HAS_OHCI
+	select SAMSUNG_GPIOLIB
 	help
 	  Base platform code for any Samsung S3C64XX device
 
diff --git a/arch/arm/plat-s3c64xx/gpiolib.c b/arch/arm/plat-s3c64xx/gpiolib.c
index 7785604..265e23b 100644
--- a/arch/arm/plat-s3c64xx/gpiolib.c
+++ b/arch/arm/plat-s3c64xx/gpiolib.c
@@ -49,150 +49,6 @@
  * [2] BANK has two control registers, GPxCON0 and GPxCON1
  */
 
-#define OFF_GPCON	(0x00)
-#define OFF_GPDAT	(0x04)
-
-#define con_4bit_shift(__off) ((__off) * 4)
-
-#if 1
-#define gpio_dbg(x...) do { } while(0)
-#else
-#define gpio_dbg(x...) printk(KERN_DEBUG x)
-#endif
-
-/* The s3c64xx_gpiolib_4bit routines are to control the gpio banks where
- * the gpio configuration register (GPxCON) has 4 bits per GPIO, as the
- * following example:
- *
- * base + 0x00: Control register, 4 bits per gpio
- *	        gpio n: 4 bits starting at (4*n)
- *		0000 = input, 0001 = output, others mean special-function
- * base + 0x04: Data register, 1 bit per gpio
- *		bit n: data bit n
- *
- * Note, since the data register is one bit per gpio and is at base + 0x4
- * we can use s3c_gpiolib_get and s3c_gpiolib_set to change the state of
- * the output.
-*/
-
-static int s3c64xx_gpiolib_4bit_input(struct gpio_chip *chip, unsigned offset)
-{
-	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
-	void __iomem *base = ourchip->base;
-	unsigned long con;
-
-	con = __raw_readl(base + OFF_GPCON);
-	con &= ~(0xf << con_4bit_shift(offset));
-	__raw_writel(con, base + OFF_GPCON);
-
-	gpio_dbg("%s: %p: CON now %08lx\n", __func__, base, con);
-
-	return 0;
-}
-
-static int s3c64xx_gpiolib_4bit_output(struct gpio_chip *chip,
-				       unsigned offset, int value)
-{
-	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
-	void __iomem *base = ourchip->base;
-	unsigned long con;
-	unsigned long dat;
-
-	con = __raw_readl(base + OFF_GPCON);
-	con &= ~(0xf << con_4bit_shift(offset));
-	con |= 0x1 << con_4bit_shift(offset);
-
-	dat = __raw_readl(base + OFF_GPDAT);
-	if (value)
-		dat |= 1 << offset;
-	else
-		dat &= ~(1 << offset);
-
-	__raw_writel(dat, base + OFF_GPDAT);
-	__raw_writel(con, base + OFF_GPCON);
-	__raw_writel(dat, base + OFF_GPDAT);
-
-	gpio_dbg("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
-
-	return 0;
-}
-
-/* The next set of routines are for the case where the GPIO configuration
- * registers are 4 bits per GPIO but there is more than one register (the
- * bank has more than 8 GPIOs.
- *
- * This case is the similar to the 4 bit case, but the registers are as
- * follows:
- *
- * base + 0x00: Control register, 4 bits per gpio (lower 8 GPIOs)
- *	        gpio n: 4 bits starting at (4*n)
- *		0000 = input, 0001 = output, others mean special-function
- * base + 0x04: Control register, 4 bits per gpio (up to 8 additions GPIOs)
- *	        gpio n: 4 bits starting at (4*n)
- *		0000 = input, 0001 = output, others mean special-function
- * base + 0x08: Data register, 1 bit per gpio
- *		bit n: data bit n
- *
- * To allow us to use the s3c_gpiolib_get and s3c_gpiolib_set routines we
- * store the 'base + 0x4' address so that these routines see the data
- * register@ourchip->base + 0x04.
-*/
-
-static int s3c64xx_gpiolib_4bit2_input(struct gpio_chip *chip, unsigned offset)
-{
-	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
-	void __iomem *base = ourchip->base;
-	void __iomem *regcon = base;
-	unsigned long con;
-
-	if (offset > 7)
-		offset -= 8;
-	else
-		regcon -= 4;
-
-	con = __raw_readl(regcon);
-	con &= ~(0xf << con_4bit_shift(offset));
-	__raw_writel(con, regcon);
-
-	gpio_dbg("%s: %p: CON %08lx\n", __func__, base, con);
-
-	return 0;
-
-}
-
-static int s3c64xx_gpiolib_4bit2_output(struct gpio_chip *chip,
-				       unsigned offset, int value)
-{
-	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
-	void __iomem *base = ourchip->base;
-	void __iomem *regcon = base;
-	unsigned long con;
-	unsigned long dat;
-
-	if (offset > 7)
-		offset -= 8;
-	else
-		regcon -= 4;
-
-	con = __raw_readl(regcon);
-	con &= ~(0xf << con_4bit_shift(offset));
-	con |= 0x1 << con_4bit_shift(offset);
-
-	dat = __raw_readl(base + OFF_GPDAT);
-	if (value)
-		dat |= 1 << offset;
-	else
-		dat &= ~(1 << offset);
-
-	__raw_writel(dat, base + OFF_GPDAT);
-	__raw_writel(con, regcon);
-	__raw_writel(dat, base + OFF_GPDAT);
-
-	gpio_dbg("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
-
-	return 0;
-}
-
 static struct s3c_gpio_cfg gpio_4bit_cfg_noint = {
 	.set_config	= s3c_gpio_setcfg_s3c64xx_4bit,
 	.set_pull	= s3c_gpio_setpull_updown,
@@ -399,20 +255,6 @@ static struct s3c_gpio_chip gpio_2bit[] = {
 	},
 };
 
-static __init void s3c64xx_gpiolib_add_4bit(struct s3c_gpio_chip *chip)
-{
-	chip->chip.direction_input = s3c64xx_gpiolib_4bit_input;
-	chip->chip.direction_output = s3c64xx_gpiolib_4bit_output;
-	chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
-}
-
-static __init void s3c64xx_gpiolib_add_4bit2(struct s3c_gpio_chip *chip)
-{
-	chip->chip.direction_input = s3c64xx_gpiolib_4bit2_input;
-	chip->chip.direction_output = s3c64xx_gpiolib_4bit2_output;
-	chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
-}
-
 static __init void s3c64xx_gpiolib_add_2bit(struct s3c_gpio_chip *chip)
 {
 	chip->pm = __gpio_pm(&s3c_gpio_pm_2bit);
@@ -432,10 +274,10 @@ static __init void s3c64xx_gpiolib_add(struct s3c_gpio_chip *chips,
 static __init int s3c64xx_gpiolib_init(void)
 {
 	s3c64xx_gpiolib_add(gpio_4bit, ARRAY_SIZE(gpio_4bit),
-			    s3c64xx_gpiolib_add_4bit);
+			    samsung_gpiolib_add_4bit);
 
 	s3c64xx_gpiolib_add(gpio_4bit2, ARRAY_SIZE(gpio_4bit2),
-			    s3c64xx_gpiolib_add_4bit2);
+			    samsung_gpiolib_add_4bit2);
 
 	s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit),
 			    s3c64xx_gpiolib_add_2bit);
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
index e6c1229..6ebbe03 100644
--- a/arch/arm/plat-samsung/Kconfig
+++ b/arch/arm/plat-samsung/Kconfig
@@ -33,6 +33,13 @@ config SAMSUNG_IRQ_UART
 
 # options for gpio configuration support
 
+config SAMSUNG_GPIOLIB
+	bool
+	help
+	  GPIOlib file contains the 4 bit modification functions for gpio
+	  configuration. GPIOlib shall be compiled only for S3C64XX and S5P
+	  series of processors.
+
 config S3C_GPIO_CFG_S3C24XX
 	bool
 	help
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index ee31038..1425a45 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -15,6 +15,7 @@ obj-y				+= clock.o
 obj-y				+= pwm-clock.o
 obj-y				+= gpio-config.o
 
+obj-$(CONFIG_SAMSUNG_GPIOLIB)	+= gpiolib.o
 obj-$(CONFIG_SAMSUNG_CLKSRC)	+= clock-clksrc.o
 
 obj-$(CONFIG_SAMSUNG_IRQ_UART)	+= irq-uart.o
diff --git a/arch/arm/plat-samsung/gpiolib.c b/arch/arm/plat-samsung/gpiolib.c
new file mode 100644
index 0000000..c1ecc94
--- /dev/null
+++ b/arch/arm/plat-samsung/gpiolib.c
@@ -0,0 +1,202 @@
+/* arch/arm/plat-samsung/gpiolib.c
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com/
+ *
+ * SAMSUNG - GPIOlib support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <mach/gpio.h>
+#include <mach/gpio-core.h>
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-helpers.h>
+
+#define GPIOCON_OFF	(0x00)
+#define GPIODAT_OFF	(0x04)
+
+#define con_4bit_shift(__off) ((__off) * 4)
+
+#ifndef DEBUG_GPIO
+#define gpio_dbg(x...) do { } while (0)
+#else
+#define gpio_dbg(x...) printk(KERN_DEBUG x)
+#endif
+
+/* The samsung_gpiolib_4bit routines are to control the gpio banks where
+ * the gpio configuration register (GPxCON) has 4 bits per GPIO, as the
+ * following example:
+ *
+ * base + 0x00: Control register, 4 bits per gpio
+ *		gpio n: 4 bits starting at (4*n)
+ *		0000 = input, 0001 = output, others mean special-function
+ * base + 0x04: Data register, 1 bit per gpio
+ *		bit n: data bit n
+ *
+ * Note, since the data register is one bit per gpio and is at base + 0x4
+ * we can use s3c_gpiolib_get and s3c_gpiolib_set to change the state of
+ * the output.
+*/
+
+int samsung_gpiolib_4bit_input(struct gpio_chip *chip, unsigned int offset)
+{
+	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+	void __iomem *base = ourchip->base;
+	unsigned long con;
+
+	con = __raw_readl(base + GPIOCON_OFF);
+	con &= ~(0xf << con_4bit_shift(offset));
+	__raw_writel(con, base + GPIOCON_OFF);
+
+	gpio_dbg("%s: %p: CON now %08lx\n", __func__, base, con);
+
+	return 0;
+}
+
+int samsung_gpiolib_4bit_output(struct gpio_chip *chip,
+				unsigned int offset, int value)
+{
+	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+	void __iomem *base = ourchip->base;
+	unsigned long con;
+	unsigned long dat;
+
+	con = __raw_readl(base + GPIOCON_OFF);
+	con &= ~(0xf << con_4bit_shift(offset));
+	con |= 0x1 << con_4bit_shift(offset);
+
+	dat = __raw_readl(base + GPIODAT_OFF);
+
+	if (value)
+		dat |= 1 << offset;
+	else
+		dat &= ~(1 << offset);
+
+	__raw_writel(dat, base + GPIODAT_OFF);
+	__raw_writel(con, base + GPIOCON_OFF);
+	__raw_writel(dat, base + GPIODAT_OFF);
+
+	gpio_dbg("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
+
+	return 0;
+}
+
+/* The next set of routines are for the case where the GPIO configuration
+ * registers are 4 bits per GPIO but there is more than one register (the
+ * bank has more than 8 GPIOs.
+ *
+ * This case is the similar to the 4 bit case, but the registers are as
+ * follows:
+ *
+ * base + 0x00: Control register, 4 bits per gpio (lower 8 GPIOs)
+ *		gpio n: 4 bits starting at (4*n)
+ *		0000 = input, 0001 = output, others mean special-function
+ * base + 0x04: Control register, 4 bits per gpio (up to 8 additions GPIOs)
+ *		gpio n: 4 bits starting at (4*n)
+ *		0000 = input, 0001 = output, others mean special-function
+ * base + 0x08: Data register, 1 bit per gpio
+ *		bit n: data bit n
+ *
+ * To allow us to use the s3c_gpiolib_get and s3c_gpiolib_set routines we
+ * store the 'base + 0x4' address so that these routines see the data
+ * register@ourchip->base + 0x04.
+*/
+
+int samsung_gpiolib_4bit2_input(struct gpio_chip *chip, unsigned int offset)
+{
+	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+	void __iomem *base = ourchip->base;
+	void __iomem *regcon = base;
+	unsigned long con;
+
+	if (offset > 7)
+		offset -= 8;
+	else
+		regcon -= 4;
+
+	con = __raw_readl(regcon);
+	con &= ~(0xf << con_4bit_shift(offset));
+	__raw_writel(con, regcon);
+
+	gpio_dbg("%s: %p: CON %08lx\n", __func__, base, con);
+
+	return 0;
+}
+
+int samsung_gpiolib_4bit2_output(struct gpio_chip *chip,
+				 unsigned int offset, int value)
+{
+	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+	void __iomem *base = ourchip->base;
+	void __iomem *regcon = base;
+	unsigned long con;
+	unsigned long dat;
+	unsigned con_offset = offset;
+
+	if (con_offset > 7)
+		con_offset -= 8;
+	else
+		regcon -= 4;
+
+	con = __raw_readl(regcon);
+	con &= ~(0xf << con_4bit_shift(con_offset));
+	con |= 0x1 << con_4bit_shift(con_offset);
+
+	dat = __raw_readl(base + GPIODAT_OFF);
+
+	if (value)
+		dat |= 1 << offset;
+	else
+		dat &= ~(1 << offset);
+
+	__raw_writel(dat, base + GPIODAT_OFF);
+	__raw_writel(con, regcon);
+	__raw_writel(dat, base + GPIODAT_OFF);
+
+	gpio_dbg("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
+
+	return 0;
+}
+
+void __init samsung_gpiolib_add_4bit(struct s3c_gpio_chip *chip)
+{
+	chip->chip.direction_input = samsung_gpiolib_4bit_input;
+	chip->chip.direction_output = samsung_gpiolib_4bit_output;
+	chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
+}
+
+void __init samsung_gpiolib_add_4bit2(struct s3c_gpio_chip *chip)
+{
+	chip->chip.direction_input = samsung_gpiolib_4bit2_input;
+	chip->chip.direction_output = samsung_gpiolib_4bit2_output;
+	chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
+}
+
+void __init samsung_gpiolib_add_4bit_chips(struct s3c_gpio_chip *chip,
+					   int nr_chips)
+{
+	for (; nr_chips > 0; nr_chips--, chip++) {
+		samsung_gpiolib_add_4bit(chip);
+		s3c_gpiolib_add(chip);
+	}
+}
+
+void __init samsung_gpiolib_add_4bit2_chips(struct s3c_gpio_chip *chip,
+					    int nr_chips)
+{
+	for (; nr_chips > 0; nr_chips--, chip++) {
+		samsung_gpiolib_add_4bit2(chip);
+		s3c_gpiolib_add(chip);
+	}
+}
-- 
1.6.0.4

[PATCH] ARM: S5P6440: Add S5P6440 GPIO support

[Ben Dooks]

From: Kukjin Kim <kgene.kim@samsung.com>

This patch adds Samsung's S5P6440 GPIO support.

Signed-off-by: Adityapratap Sharma <aditya.ps@samsung.com>
Signed-off-by: Atul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
[ben-linux at fluff.org: remove changelog comments from internal dev]
[ben-linux at fluff.org: fix aditya's email address]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---
 arch/arm/mach-s5p6440/Makefile                 |    2 +-
 arch/arm/mach-s5p6440/include/mach/gpio-core.h |   40 +++
 arch/arm/mach-s5p6440/include/mach/regs-gpio.h |   54 ++++
 arch/arm/mach-s5p6440/s5p6440-gpio.c           |  325 ++++++++++++++++++++++++
 arch/arm/plat-s5p/Kconfig                      |    4 +
 5 files changed, 424 insertions(+), 1 deletions(-)
 create mode 100644 arch/arm/mach-s5p6440/include/mach/regs-gpio.h
 create mode 100644 arch/arm/mach-s5p6440/s5p6440-gpio.c

diff --git a/arch/arm/mach-s5p6440/Makefile b/arch/arm/mach-s5p6440/Makefile
index a3ffda9..a79b130 100644
--- a/arch/arm/mach-s5p6440/Makefile
+++ b/arch/arm/mach-s5p6440/Makefile
@@ -12,7 +12,7 @@ obj-				:=
 
 # Core support for S5P6440 system
 
-obj-$(CONFIG_CPU_S5P6440)	+= cpu.o
+obj-$(CONFIG_CPU_S5P6440)	+= cpu.o s5p6440-gpio.o
 
 # machine support
 
diff --git a/arch/arm/mach-s5p6440/include/mach/gpio-core.h b/arch/arm/mach-s5p6440/include/mach/gpio-core.h
index ff7fb30..b6368df 100644
--- a/arch/arm/mach-s5p6440/include/mach/gpio-core.h
+++ b/arch/arm/mach-s5p6440/include/mach/gpio-core.h
@@ -16,4 +16,44 @@
 /* currently we just include the platform support */
 #include <plat/gpio-core.h>
 
+#define con_4bit_shift(__off) ((__off) * 4)
+
+/* various helper functions added which are specific to PLAT_S5P platform */
+
+/**
+ * s5p6440_gpiolib_set_cfg - S5P style GPIO configuration
+ * @chip: The gpio chip that is being configured.
+ * @nr_chips: no of chips (gpio ports) for the GPIO being configured.
+*/
+extern void s5p6440_gpiolib_set_cfg(struct s3c_gpio_cfg *chipcfg, int nr_chips);
+
+/**
+ * samsung_gpiolib_add_4bit_chips - 4bit single register GPIO config.
+ * @chip: The gpio chip that is being configured.
+ * @nr_chips: The no of chips (gpio ports) for the GPIO being configured.
+ *
+ * This helper deal with the GPIO cases where the control register has 4 bits
+ * of control per GPIO, generally in the form of:
+ * 0000 = Input
+ * 0001 = Output
+ * others = Special functions (dependant on bank)
+ *
+ * Note, since the code to deal with the case where there are two control
+ * registers instead of one, we do not have a seperate set of function
+ * (samsung_gpiolib_add_4bit2_chips)for each case.
+ */
+extern void samsung_gpiolib_add_4bit_chips(struct s3c_gpio_chip *chip,
+					   int nr_chips);
+extern void samsung_gpiolib_add_4bit2_chips(struct s3c_gpio_chip *chip,
+					    int nr_chips);
+
+/**
+ * s5p6440_gpio_setcfg_4bit_rbank - S5P64XX 4bit single register GPIO config.
+ * @chip: The gpio chip that is being configured (always R).
+ * @off: The offset for the GPIO being configured.
+ * @cfg: The configuration value to set.
+ *
+ */
+extern int s5p6440_gpio_setcfg_4bit_rbank(struct s3c_gpio_chip *chip,
+					  unsigned int off, unsigned int cfg);
 #endif /* __ASM_ARCH_GPIO_CORE_H */
diff --git a/arch/arm/mach-s5p6440/include/mach/regs-gpio.h b/arch/arm/mach-s5p6440/include/mach/regs-gpio.h
new file mode 100644
index 0000000..82ff753
--- /dev/null
+++ b/arch/arm/mach-s5p6440/include/mach/regs-gpio.h
@@ -0,0 +1,54 @@
+/* linux/arch/arm/mach-s5p6440/include/mach/regs-gpio.h
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com/
+ *
+ * S5P6440 - GPIO register definitions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __ASM_ARCH_REGS_GPIO_H
+#define __ASM_ARCH_REGS_GPIO_H __FILE__
+
+#include <mach/map.h>
+
+/* Base addresses for each of the banks */
+#define S5P6440_GPA_BASE		(S5P_VA_GPIO + 0x0000)
+#define S5P6440_GPB_BASE		(S5P_VA_GPIO + 0x0020)
+#define S5P6440_GPC_BASE		(S5P_VA_GPIO + 0x0040)
+#define S5P6440_GPF_BASE		(S5P_VA_GPIO + 0x00A0)
+#define S5P6440_GPG_BASE		(S5P_VA_GPIO + 0x00C0)
+#define S5P6440_GPH_BASE		(S5P_VA_GPIO + 0x00E0)
+#define S5P6440_GPI_BASE		(S5P_VA_GPIO + 0x0100)
+#define S5P6440_GPJ_BASE		(S5P_VA_GPIO + 0x0120)
+#define S5P6440_GPN_BASE		(S5P_VA_GPIO + 0x0830)
+#define S5P6440_GPP_BASE		(S5P_VA_GPIO + 0x0160)
+#define S5P6440_GPR_BASE		(S5P_VA_GPIO + 0x0290)
+#define S5P6440_EINT0CON0		(S5P_VA_GPIO + 0x900)
+#define S5P6440_EINT0FLTCON0		(S5P_VA_GPIO + 0x910)
+#define S5P6440_EINT0FLTCON1		(S5P_VA_GPIO + 0x914)
+#define S5P6440_EINT0MASK		(S5P_VA_GPIO + 0x920)
+#define S5P6440_EINT0PEND		(S5P_VA_GPIO + 0x924)
+
+/* for LCD */
+#define S5P6440_SPCON_LCD_SEL_RGB	(1 << 0)
+#define S5P6440_SPCON_LCD_SEL_MASK	(3 << 0)
+
+/* These set of macros are not really useful for the
+ * GPF/GPI/GPJ/GPN/GPP,
+ * useful for others set of GPIO's (4 bit)
+ */
+#define S5P6440_GPIO_CONMASK(__gpio)	(0xf << ((__gpio) * 4))
+#define S5P6440_GPIO_INPUT(__gpio)	(0x0 << ((__gpio) * 4))
+#define S5P6440_GPIO_OUTPUT(__gpio)	(0x1 << ((__gpio) * 4))
+
+/* Use these macros for GPF/GPI/GPJ/GPN/GPP set of GPIO (2 bit)
+ * */
+#define S5P6440_GPIO2_CONMASK(__gpio)	(0x3 << ((__gpio) * 2))
+#define S5P6440_GPIO2_INPUT(__gpio)	(0x0 << ((__gpio) * 2))
+#define S5P6440_GPIO2_OUTPUT(__gpio)	(0x1 << ((__gpio) * 2))
+
+#endif /* __ASM_ARCH_REGS_GPIO_H */
diff --git a/arch/arm/mach-s5p6440/s5p6440-gpio.c b/arch/arm/mach-s5p6440/s5p6440-gpio.c
new file mode 100644
index 0000000..dff1703
--- /dev/null
+++ b/arch/arm/mach-s5p6440/s5p6440-gpio.c
@@ -0,0 +1,325 @@
+/* arch/arm/mach-s5p6440/s5p6440-gpio.c
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ * 		http://www.samsung.com/
+ *
+ * S5P6440 - GPIOlib support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <mach/map.h>
+#include <mach/gpio.h>
+#include <mach/gpio-core.h>
+#include <mach/regs-gpio.h>
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-helpers.h>
+
+#define GPIODAT_OFF	(0x04)
+#define con_4bit_shift(__off) ((__off) * 4)
+
+/* GPIO bank summary:
+*
+* Bank	GPIOs	Style	SlpCon	ExtInt Group
+* A	6	4Bit	Yes	1
+* B	7	4Bit	Yes	1
+* C	8	4Bit	Yes	2
+* F	2	2Bit	Yes	4 [1]
+* G	7	4Bit	Yes	5
+* H	10	4Bit[2]	Yes	6
+* I	16	2Bit	Yes	None
+* J	12	2Bit	Yes	None
+* N	16	2Bit	No	IRQ_EINT
+* P	8	2Bit	Yes	8
+* R	15	4Bit[2]	Yes	8
+*
+* [1] BANKF pins 14,15 do not form part of the external interrupt sources
+* [2] BANK has two control registers, GPxCON0 and GPxCON1
+*/
+
+static int s5p6440_gpiolib_rbank_4bit2_input(struct gpio_chip *chip,
+					     unsigned int offset)
+{
+	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+	void __iomem *base = ourchip->base;
+	void __iomem *regcon = base;
+	unsigned long con;
+
+	switch (offset) {
+	case 6:
+		offset += 1;
+	case 0:
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+	case 5:
+		regcon -= 4;
+		break;
+	default:
+		offset -= 7;
+		break;
+	}
+
+	con = __raw_readl(regcon);
+	con &= ~(0xf << con_4bit_shift(offset));
+	__raw_writel(con, regcon);
+
+	return 0;
+}
+
+static int s5p6440_gpiolib_rbank_4bit2_output(struct gpio_chip *chip,
+					      unsigned int offset, int value)
+{
+	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+	void __iomem *base = ourchip->base;
+	void __iomem *regcon = base;
+	unsigned long con;
+	unsigned long dat;
+	unsigned con_offset  = offset;
+
+	switch (con_offset) {
+	case 6:
+		con_offset += 1;
+	case 0:
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+	case 5:
+		regcon -= 4;
+		break;
+	default:
+		con_offset -= 7;
+		break;
+	}
+
+	con = __raw_readl(regcon);
+	con &= ~(0xf << con_4bit_shift(con_offset));
+	con |= 0x1 << con_4bit_shift(con_offset);
+
+	dat = __raw_readl(base + GPIODAT_OFF);
+	if (value)
+		dat |= 1 << offset;
+	else
+		dat &= ~(1 << offset);
+
+	__raw_writel(con, regcon);
+	__raw_writel(dat, base + GPIODAT_OFF);
+
+	return 0;
+}
+
+int s5p6440_gpio_setcfg_4bit_rbank(struct s3c_gpio_chip *chip,
+				   unsigned int off, unsigned int cfg)
+{
+	void __iomem *reg = chip->base;
+	unsigned int shift;
+	u32 con;
+
+	switch (off) {
+	case 0:
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+	case 5:
+		shift = (off & 7) * 4;
+		reg -= 4;
+		break;
+	case 6:
+		shift = ((off + 1) & 7) * 4;
+		reg -= 4;
+	default:
+		shift = ((off + 1) & 7) * 4;
+		break;
+	}
+
+	if (s3c_gpio_is_cfg_special(cfg)) {
+		cfg &= 0xf;
+		cfg <<= shift;
+	}
+
+	con = __raw_readl(reg);
+	con &= ~(0xf << shift);
+	con |= cfg;
+	__raw_writel(con, reg);
+
+	return 0;
+}
+
+static struct s3c_gpio_cfg s5p6440_gpio_cfgs[] = {
+	{
+		.cfg_eint	= 0,
+	}, {
+		.cfg_eint	= 7,
+	}, {
+		.cfg_eint	= 3,
+		.set_config	= s5p6440_gpio_setcfg_4bit_rbank,
+	}, {
+		.cfg_eint	= 0,
+		.set_config	= s3c_gpio_setcfg_s3c24xx,
+	}, {
+		.cfg_eint	= 2,
+		.set_config	= s3c_gpio_setcfg_s3c24xx,
+	}, {
+		.cfg_eint	= 3,
+		.set_config	= s3c_gpio_setcfg_s3c24xx,
+	},
+};
+
+static struct s3c_gpio_chip s5p6440_gpio_4bit[] = {
+	{
+		.base	= S5P6440_GPA_BASE,
+		.config	= &s5p6440_gpio_cfgs[1],
+		.chip	= {
+			.base	= S5P6440_GPA(0),
+			.ngpio	= S5P6440_GPIO_A_NR,
+			.label	= "GPA",
+		},
+	}, {
+		.base	= S5P6440_GPB_BASE,
+		.config	= &s5p6440_gpio_cfgs[1],
+		.chip	= {
+			.base	= S5P6440_GPB(0),
+			.ngpio	= S5P6440_GPIO_B_NR,
+			.label	= "GPB",
+		},
+	}, {
+		.base	= S5P6440_GPC_BASE,
+		.config	= &s5p6440_gpio_cfgs[1],
+		.chip	= {
+			.base	= S5P6440_GPC(0),
+			.ngpio	= S5P6440_GPIO_C_NR,
+			.label	= "GPC",
+		},
+	}, {
+		.base	= S5P6440_GPG_BASE,
+		.config	= &s5p6440_gpio_cfgs[1],
+		.chip	= {
+			.base	= S5P6440_GPG(0),
+			.ngpio	= S5P6440_GPIO_G_NR,
+			.label	= "GPG",
+		},
+	},
+};
+
+static struct s3c_gpio_chip s5p6440_gpio_4bit2[] = {
+	{
+		.base	= S5P6440_GPH_BASE + 0x4,
+		.config	= &s5p6440_gpio_cfgs[1],
+		.chip	= {
+			.base	= S5P6440_GPH(0),
+			.ngpio	= S5P6440_GPIO_H_NR,
+			.label	= "GPH",
+		},
+	},
+};
+
+static struct s3c_gpio_chip gpio_rbank_4bit2[] = {
+	{
+		.base	= S5P6440_GPR_BASE + 0x4,
+		.config	= &s5p6440_gpio_cfgs[2],
+		.chip	= {
+			.base	= S5P6440_GPR(0),
+			.ngpio	= S5P6440_GPIO_R_NR,
+			.label	= "GPR",
+		},
+	},
+};
+
+static struct s3c_gpio_chip s5p6440_gpio_2bit[] = {
+	{
+		.base	= S5P6440_GPF_BASE,
+		.config	= &s5p6440_gpio_cfgs[5],
+		.chip	= {
+			.base	= S5P6440_GPF(0),
+			.ngpio	= S5P6440_GPIO_F_NR,
+			.label	= "GPF",
+		},
+	}, {
+		.base	= S5P6440_GPI_BASE,
+		.config	= &s5p6440_gpio_cfgs[3],
+		.chip	= {
+			.base	= S5P6440_GPI(0),
+			.ngpio	= S5P6440_GPIO_I_NR,
+			.label	= "GPI",
+		},
+	}, {
+		.base	= S5P6440_GPJ_BASE,
+		.config	= &s5p6440_gpio_cfgs[3],
+		.chip	= {
+			.base	= S5P6440_GPJ(0),
+			.ngpio	= S5P6440_GPIO_J_NR,
+			.label	= "GPJ",
+		},
+	}, {
+		.base	= S5P6440_GPN_BASE,
+		.config	= &s5p6440_gpio_cfgs[4],
+		.chip	= {
+			.base	= S5P6440_GPN(0),
+			.ngpio	= S5P6440_GPIO_N_NR,
+			.label	= "GPN",
+		},
+	}, {
+		.base	= S5P6440_GPP_BASE,
+		.config	= &s5p6440_gpio_cfgs[5],
+		.chip	= {
+			.base	= S5P6440_GPP(0),
+			.ngpio	= S5P6440_GPIO_P_NR,
+			.label	= "GPP",
+		},
+	},
+};
+
+void __init s5p6440_gpiolib_set_cfg(struct s3c_gpio_cfg *chipcfg, int nr_chips)
+{
+	for (; nr_chips > 0; nr_chips--, chipcfg++) {
+		if (!chipcfg->set_config)
+			chipcfg->set_config	= s3c_gpio_setcfg_s3c64xx_4bit;
+		if (!chipcfg->set_pull)
+			chipcfg->set_pull	= s3c_gpio_setpull_updown;
+		if (!chipcfg->get_pull)
+			chipcfg->get_pull	= s3c_gpio_getpull_updown;
+	}
+}
+
+static void __init s5p6440_gpio_add_rbank_4bit2(struct s3c_gpio_chip *chip,
+						int nr_chips)
+{
+	for (; nr_chips > 0; nr_chips--, chip++) {
+		chip->chip.direction_input = s5p6440_gpiolib_rbank_4bit2_input;
+		chip->chip.direction_output =
+					s5p6440_gpiolib_rbank_4bit2_output;
+		s3c_gpiolib_add(chip);
+	}
+}
+
+static int __init s5p6440_gpiolib_init(void)
+{
+	struct s3c_gpio_chip *chips = s5p6440_gpio_2bit;
+	int nr_chips = ARRAY_SIZE(s5p6440_gpio_2bit);
+
+	s5p6440_gpiolib_set_cfg(s5p6440_gpio_cfgs,
+				ARRAY_SIZE(s5p6440_gpio_cfgs));
+
+	for (; nr_chips > 0; nr_chips--, chips++)
+		s3c_gpiolib_add(chips);
+
+	samsung_gpiolib_add_4bit_chips(s5p6440_gpio_4bit,
+				ARRAY_SIZE(s5p6440_gpio_4bit));
+
+	samsung_gpiolib_add_4bit2_chips(s5p6440_gpio_4bit2,
+				ARRAY_SIZE(s5p6440_gpio_4bit2));
+
+	s5p6440_gpio_add_rbank_4bit2(gpio_rbank_4bit2,
+				ARRAY_SIZE(gpio_rbank_4bit2));
+
+	return 0;
+}
+arch_initcall(s5p6440_gpiolib_init);
diff --git a/arch/arm/plat-s5p/Kconfig b/arch/arm/plat-s5p/Kconfig
index 7e08b40..9d8686c 100644
--- a/arch/arm/plat-s5p/Kconfig
+++ b/arch/arm/plat-s5p/Kconfig
@@ -14,6 +14,10 @@ config PLAT_S5P
 	select NO_IOPORT
 	select ARCH_REQUIRE_GPIOLIB
 	select S3C_GPIO_TRACK
+	select SAMSUNG_GPIOLIB
+	select S3C_GPIO_CFG_S3C64XX
+	select S3C_GPIO_PULL_UPDOWN
+	select S3C_GPIO_CFG_S3C24XX
 	select PLAT_SAMSUNG
 	select SAMSUNG_CLKSRC
 	select SAMSUNG_IRQ_VIC_TIMER
-- 
1.6.0.4

[PATCH] ARM: SAMSUNG: Move pm-gpio into plat-samsung

[Ben Dooks]

Move the pm-gpio code into plat-samsung.

Note, this should be changed later to properly compile the 4bit code if
the 4bit settings are enabled.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---
 arch/arm/plat-s3c/Makefile                    |    1 -
 arch/arm/plat-samsung/Makefile                |    4 ++++
 arch/arm/{plat-s3c => plat-samsung}/pm-gpio.c |    0
 3 files changed, 4 insertions(+), 1 deletions(-)
 rename arch/arm/{plat-s3c => plat-samsung}/pm-gpio.c (100%)

diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile
index ea4a001..ac12ba5 100644
--- a/arch/arm/plat-s3c/Makefile
+++ b/arch/arm/plat-s3c/Makefile
@@ -22,7 +22,6 @@ obj-$(CONFIG_S3C_DMA)		+= dma.o
 # PM support
 
 obj-$(CONFIG_PM)		+= pm.o
-obj-$(CONFIG_PM)		+= pm-gpio.o
 obj-$(CONFIG_S3C2410_PM_CHECK)	+= pm-check.o
 
 # PWM support
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index 1425a45..0310e04 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -36,3 +36,7 @@ obj-$(CONFIG_S3C_DEV_FB)	+= dev-fb.o
 obj-$(CONFIG_S3C_DEV_USB_HOST)	+= dev-usb.o
 obj-$(CONFIG_S3C_DEV_USB_HSOTG)	+= dev-usb-hsotg.o
 obj-$(CONFIG_S3C_DEV_NAND)	+= dev-nand.o
+
+# PM support
+
+obj-$(CONFIG_PM)		+= pm-gpio.o
diff --git a/arch/arm/plat-s3c/pm-gpio.c b/arch/arm/plat-samsung/pm-gpio.c
similarity index 100%
rename from arch/arm/plat-s3c/pm-gpio.c
rename to arch/arm/plat-samsung/pm-gpio.c
-- 
1.6.0.4

[PATCH] ARM: SAMSUNG: Move gpiolib support in gpio.c to plat-samsung

[Ben Dooks]

Move the gpio.c code containing the core gpiolib and GPIO support to
plat-samsung from plat-s3c as it is used by all current Samsung SoCs.

Note, we didn't move this to gpiolib.c as it contains code that is not
strictly for gpiolib support and the 4bit code is already called gpiolib.c
so make the change easier by not renaming both files in one go.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---
 arch/arm/plat-s3c/Makefile                 |    1 -
 arch/arm/plat-samsung/Makefile             |    1 +
 arch/arm/{plat-s3c => plat-samsung}/gpio.c |    0
 3 files changed, 1 insertions(+), 1 deletions(-)
 rename arch/arm/{plat-s3c => plat-samsung}/gpio.c (100%)

diff --git a/arch/arm/plat-s3c/Makefile b/arch/arm/plat-s3c/Makefile
index ac12ba5..20cb335 100644
--- a/arch/arm/plat-s3c/Makefile
+++ b/arch/arm/plat-s3c/Makefile
@@ -13,7 +13,6 @@ obj-				:=
 
 obj-y				+= init.o
 obj-y				+= time.o
-obj-y				+= gpio.o
 
 # DMA support
 
diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile
index 0310e04..612450f 100644
--- a/arch/arm/plat-samsung/Makefile
+++ b/arch/arm/plat-samsung/Makefile
@@ -13,6 +13,7 @@ obj-				:=
 
 obj-y				+= clock.o
 obj-y				+= pwm-clock.o
+obj-y				+= gpio.o
 obj-y				+= gpio-config.o
 
 obj-$(CONFIG_SAMSUNG_GPIOLIB)	+= gpiolib.o
diff --git a/arch/arm/plat-s3c/gpio.c b/arch/arm/plat-samsung/gpio.c
similarity index 100%
rename from arch/arm/plat-s3c/gpio.c
rename to arch/arm/plat-samsung/gpio.c
-- 
1.6.0.4

[PATCH] ARM: S5P6440: Add S5P6440 GPIO support

[Ben Dooks]

On Mon, Jan 18, 2010 at 02:38:37AM +0000, Ben Dooks wrote:
> From: Kukjin Kim <kgene.kim@samsung.com>
> 
> This patch adds Samsung's S5P6440 GPIO support.
> 
> Signed-off-by: Adityapratap Sharma <aditya.ps@samsung.com>
> Signed-off-by: Atul Dahiya <atul.dahiya@samsung.com>
> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
> [ben-linux at fluff.org: remove changelog comments from internal dev]
> [ben-linux at fluff.org: fix aditya's email address]
> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
> ---
>  arch/arm/mach-s5p6440/Makefile                 |    2 +-
>  arch/arm/mach-s5p6440/include/mach/gpio-core.h |   40 +++
>  arch/arm/mach-s5p6440/include/mach/regs-gpio.h |   54 ++++
>  arch/arm/mach-s5p6440/s5p6440-gpio.c           |  325 ++++++++++++++++++++++++
>  arch/arm/plat-s5p/Kconfig                      |    4 +
>  5 files changed, 424 insertions(+), 1 deletions(-)
>  create mode 100644 arch/arm/mach-s5p6440/include/mach/regs-gpio.h
>  create mode 100644 arch/arm/mach-s5p6440/s5p6440-gpio.c
> 
> diff --git a/arch/arm/mach-s5p6440/Makefile b/arch/arm/mach-s5p6440/Makefile
> index a3ffda9..a79b130 100644
> --- a/arch/arm/mach-s5p6440/Makefile
> +++ b/arch/arm/mach-s5p6440/Makefile
> @@ -12,7 +12,7 @@ obj-				:=
>  
>  # Core support for S5P6440 system
>  
> -obj-$(CONFIG_CPU_S5P6440)	+= cpu.o
> +obj-$(CONFIG_CPU_S5P6440)	+= cpu.o s5p6440-gpio.o
>  
>  # machine support
>  
> diff --git a/arch/arm/mach-s5p6440/include/mach/gpio-core.h b/arch/arm/mach-s5p6440/include/mach/gpio-core.h
> index ff7fb30..b6368df 100644
> --- a/arch/arm/mach-s5p6440/include/mach/gpio-core.h
> +++ b/arch/arm/mach-s5p6440/include/mach/gpio-core.h
> @@ -16,4 +16,44 @@
>  /* currently we just include the platform support */
>  #include <plat/gpio-core.h>
>  
> +#define con_4bit_shift(__off) ((__off) * 4)
> +
> +/* various helper functions added which are specific to PLAT_S5P platform */
> +
> +/**
> + * s5p6440_gpiolib_set_cfg - S5P style GPIO configuration
> + * @chip: The gpio chip that is being configured.
> + * @nr_chips: no of chips (gpio ports) for the GPIO being configured.
> +*/
> +extern void s5p6440_gpiolib_set_cfg(struct s3c_gpio_cfg *chipcfg, int nr_chips);

this doesn't seem to get outside of arch/arm/mach-s5p6440/s5p6440-gpio.c
so could do with not being added to this header.

> +/**
> + * samsung_gpiolib_add_4bit_chips - 4bit single register GPIO config.
> + * @chip: The gpio chip that is being configured.
> + * @nr_chips: The no of chips (gpio ports) for the GPIO being configured.
> + *
> + * This helper deal with the GPIO cases where the control register has 4 bits
> + * of control per GPIO, generally in the form of:
> + * 0000 = Input
> + * 0001 = Output
> + * others = Special functions (dependant on bank)
> + *
> + * Note, since the code to deal with the case where there are two control
> + * registers instead of one, we do not have a seperate set of function
> + * (samsung_gpiolib_add_4bit2_chips)for each case.
> + */
> +extern void samsung_gpiolib_add_4bit_chips(struct s3c_gpio_chip *chip,
> +					   int nr_chips);
> +extern void samsung_gpiolib_add_4bit2_chips(struct s3c_gpio_chip *chip,
> +					    int nr_chips);

Should have been added to the previous patch moving the code to the
common directory and also should have been in plat-s3c/include/plat/gpio-core.h
instead of here.

> +/**
> + * s5p6440_gpio_setcfg_4bit_rbank - S5P64XX 4bit single register GPIO config.
> + * @chip: The gpio chip that is being configured (always R).
> + * @off: The offset for the GPIO being configured.
> + * @cfg: The configuration value to set.
> + *
> + */
> +extern int s5p6440_gpio_setcfg_4bit_rbank(struct s3c_gpio_chip *chip,
> +					  unsigned int off, unsigned int cfg);
>  #endif /* __ASM_ARCH_GPIO_CORE_H */

If we can find a new place for this definition we can elimiante all
users of <mach/gpio-core.h> and just use <plat/gpio-core.h> instead.

Since it is just the one definition it could go into <plat/gpio-core.h>

> diff --git a/arch/arm/mach-s5p6440/include/mach/regs-gpio.h b/arch/arm/mach-s5p6440/include/mach/regs-gpio.h
> new file mode 100644
> index 0000000..82ff753
> --- /dev/null
> +++ b/arch/arm/mach-s5p6440/include/mach/regs-gpio.h
> @@ -0,0 +1,54 @@
> +/* linux/arch/arm/mach-s5p6440/include/mach/regs-gpio.h
> + *
> + * Copyright (c) 2009 Samsung Electronics Co., Ltd.
> + *		http://www.samsung.com/
> + *
> + * S5P6440 - GPIO register definitions
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef __ASM_ARCH_REGS_GPIO_H
> +#define __ASM_ARCH_REGS_GPIO_H __FILE__
> +
> +#include <mach/map.h>
> +
> +/* Base addresses for each of the banks */
> +#define S5P6440_GPA_BASE		(S5P_VA_GPIO + 0x0000)
> +#define S5P6440_GPB_BASE		(S5P_VA_GPIO + 0x0020)
> +#define S5P6440_GPC_BASE		(S5P_VA_GPIO + 0x0040)
> +#define S5P6440_GPF_BASE		(S5P_VA_GPIO + 0x00A0)
> +#define S5P6440_GPG_BASE		(S5P_VA_GPIO + 0x00C0)
> +#define S5P6440_GPH_BASE		(S5P_VA_GPIO + 0x00E0)
> +#define S5P6440_GPI_BASE		(S5P_VA_GPIO + 0x0100)
> +#define S5P6440_GPJ_BASE		(S5P_VA_GPIO + 0x0120)
> +#define S5P6440_GPN_BASE		(S5P_VA_GPIO + 0x0830)
> +#define S5P6440_GPP_BASE		(S5P_VA_GPIO + 0x0160)
> +#define S5P6440_GPR_BASE		(S5P_VA_GPIO + 0x0290)
> +#define S5P6440_EINT0CON0		(S5P_VA_GPIO + 0x900)
> +#define S5P6440_EINT0FLTCON0		(S5P_VA_GPIO + 0x910)
> +#define S5P6440_EINT0FLTCON1		(S5P_VA_GPIO + 0x914)
> +#define S5P6440_EINT0MASK		(S5P_VA_GPIO + 0x920)
> +#define S5P6440_EINT0PEND		(S5P_VA_GPIO + 0x924)
> +
> +/* for LCD */
> +#define S5P6440_SPCON_LCD_SEL_RGB	(1 << 0)
> +#define S5P6440_SPCON_LCD_SEL_MASK	(3 << 0)
> +
> +/* These set of macros are not really useful for the
> + * GPF/GPI/GPJ/GPN/GPP,
> + * useful for others set of GPIO's (4 bit)
> + */
> +#define S5P6440_GPIO_CONMASK(__gpio)	(0xf << ((__gpio) * 4))
> +#define S5P6440_GPIO_INPUT(__gpio)	(0x0 << ((__gpio) * 4))
> +#define S5P6440_GPIO_OUTPUT(__gpio)	(0x1 << ((__gpio) * 4))
> +
> +/* Use these macros for GPF/GPI/GPJ/GPN/GPP set of GPIO (2 bit)
> + * */
> +#define S5P6440_GPIO2_CONMASK(__gpio)	(0x3 << ((__gpio) * 2))
> +#define S5P6440_GPIO2_INPUT(__gpio)	(0x0 << ((__gpio) * 2))
> +#define S5P6440_GPIO2_OUTPUT(__gpio)	(0x1 << ((__gpio) * 2))
> +
> +#endif /* __ASM_ARCH_REGS_GPIO_H */
> diff --git a/arch/arm/mach-s5p6440/s5p6440-gpio.c b/arch/arm/mach-s5p6440/s5p6440-gpio.c
> new file mode 100644
> index 0000000..dff1703
> --- /dev/null
> +++ b/arch/arm/mach-s5p6440/s5p6440-gpio.c
> @@ -0,0 +1,325 @@
> +/* arch/arm/mach-s5p6440/s5p6440-gpio.c
> + *
> + * Copyright (c) 2009 Samsung Electronics Co., Ltd.
> + * 		http://www.samsung.com/
> + *
> + * S5P6440 - GPIOlib support
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/irq.h>
> +#include <linux/io.h>
> +#include <mach/map.h>
> +#include <mach/gpio.h>
> +#include <mach/gpio-core.h>
> +#include <mach/regs-gpio.h>
> +#include <plat/gpio-cfg.h>
> +#include <plat/gpio-cfg-helpers.h>
> +
> +#define GPIODAT_OFF	(0x04)
> +#define con_4bit_shift(__off) ((__off) * 4)

That should have already come from the header file.

> +/* GPIO bank summary:
> +*
> +* Bank	GPIOs	Style	SlpCon	ExtInt Group
> +* A	6	4Bit	Yes	1
> +* B	7	4Bit	Yes	1
> +* C	8	4Bit	Yes	2
> +* F	2	2Bit	Yes	4 [1]
> +* G	7	4Bit	Yes	5
> +* H	10	4Bit[2]	Yes	6
> +* I	16	2Bit	Yes	None
> +* J	12	2Bit	Yes	None
> +* N	16	2Bit	No	IRQ_EINT
> +* P	8	2Bit	Yes	8
> +* R	15	4Bit[2]	Yes	8
> +*
> +* [1] BANKF pins 14,15 do not form part of the external interrupt sources
> +* [2] BANK has two control registers, GPxCON0 and GPxCON1
> +*/
> +
> +static int s5p6440_gpiolib_rbank_4bit2_input(struct gpio_chip *chip,
> +					     unsigned int offset)
> +{
> +	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
> +	void __iomem *base = ourchip->base;
> +	void __iomem *regcon = base;
> +	unsigned long con;
> +
> +	switch (offset) {
> +	case 6:
> +		offset += 1;
> +	case 0:
> +	case 1:
> +	case 2:
> +	case 3:
> +	case 4:
> +	case 5:
> +		regcon -= 4;
> +		break;
> +	default:
> +		offset -= 7;
> +		break;
> +	}
> +
> +	con = __raw_readl(regcon);
> +	con &= ~(0xf << con_4bit_shift(offset));
> +	__raw_writel(con, regcon);
> +
> +	return 0;
> +}
> +
> +static int s5p6440_gpiolib_rbank_4bit2_output(struct gpio_chip *chip,
> +					      unsigned int offset, int value)
> +{
> +	struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
> +	void __iomem *base = ourchip->base;
> +	void __iomem *regcon = base;
> +	unsigned long con;
> +	unsigned long dat;
> +	unsigned con_offset  = offset;
> +
> +	switch (con_offset) {
> +	case 6:
> +		con_offset += 1;
> +	case 0:
> +	case 1:
> +	case 2:
> +	case 3:
> +	case 4:
> +	case 5:
> +		regcon -= 4;
> +		break;
> +	default:
> +		con_offset -= 7;
> +		break;
> +	}
> +
> +	con = __raw_readl(regcon);
> +	con &= ~(0xf << con_4bit_shift(con_offset));
> +	con |= 0x1 << con_4bit_shift(con_offset);
> +
> +	dat = __raw_readl(base + GPIODAT_OFF);
> +	if (value)
> +		dat |= 1 << offset;
> +	else
> +		dat &= ~(1 << offset);
> +
> +	__raw_writel(con, regcon);
> +	__raw_writel(dat, base + GPIODAT_OFF);
> +
> +	return 0;
> +}
> +
> +int s5p6440_gpio_setcfg_4bit_rbank(struct s3c_gpio_chip *chip,
> +				   unsigned int off, unsigned int cfg)
> +{
> +	void __iomem *reg = chip->base;
> +	unsigned int shift;
> +	u32 con;
> +
> +	switch (off) {
> +	case 0:
> +	case 1:
> +	case 2:
> +	case 3:
> +	case 4:
> +	case 5:
> +		shift = (off & 7) * 4;
> +		reg -= 4;
> +		break;
> +	case 6:
> +		shift = ((off + 1) & 7) * 4;
> +		reg -= 4;
> +	default:
> +		shift = ((off + 1) & 7) * 4;
> +		break;
> +	}
> +
> +	if (s3c_gpio_is_cfg_special(cfg)) {
> +		cfg &= 0xf;
> +		cfg <<= shift;
> +	}
> +
> +	con = __raw_readl(reg);
> +	con &= ~(0xf << shift);
> +	con |= cfg;
> +	__raw_writel(con, reg);
> +
> +	return 0;
> +}
> +
> +static struct s3c_gpio_cfg s5p6440_gpio_cfgs[] = {
> +	{
> +		.cfg_eint	= 0,
> +	}, {
> +		.cfg_eint	= 7,
> +	}, {
> +		.cfg_eint	= 3,
> +		.set_config	= s5p6440_gpio_setcfg_4bit_rbank,
> +	}, {
> +		.cfg_eint	= 0,
> +		.set_config	= s3c_gpio_setcfg_s3c24xx,
> +	}, {
> +		.cfg_eint	= 2,
> +		.set_config	= s3c_gpio_setcfg_s3c24xx,
> +	}, {
> +		.cfg_eint	= 3,
> +		.set_config	= s3c_gpio_setcfg_s3c24xx,
> +	},
> +};
> +
> +static struct s3c_gpio_chip s5p6440_gpio_4bit[] = {
> +	{
> +		.base	= S5P6440_GPA_BASE,
> +		.config	= &s5p6440_gpio_cfgs[1],
> +		.chip	= {
> +			.base	= S5P6440_GPA(0),
> +			.ngpio	= S5P6440_GPIO_A_NR,
> +			.label	= "GPA",
> +		},
> +	}, {
> +		.base	= S5P6440_GPB_BASE,
> +		.config	= &s5p6440_gpio_cfgs[1],
> +		.chip	= {
> +			.base	= S5P6440_GPB(0),
> +			.ngpio	= S5P6440_GPIO_B_NR,
> +			.label	= "GPB",
> +		},
> +	}, {
> +		.base	= S5P6440_GPC_BASE,
> +		.config	= &s5p6440_gpio_cfgs[1],
> +		.chip	= {
> +			.base	= S5P6440_GPC(0),
> +			.ngpio	= S5P6440_GPIO_C_NR,
> +			.label	= "GPC",
> +		},
> +	}, {
> +		.base	= S5P6440_GPG_BASE,
> +		.config	= &s5p6440_gpio_cfgs[1],
> +		.chip	= {
> +			.base	= S5P6440_GPG(0),
> +			.ngpio	= S5P6440_GPIO_G_NR,
> +			.label	= "GPG",
> +		},
> +	},
> +};
> +
> +static struct s3c_gpio_chip s5p6440_gpio_4bit2[] = {
> +	{
> +		.base	= S5P6440_GPH_BASE + 0x4,
> +		.config	= &s5p6440_gpio_cfgs[1],
> +		.chip	= {
> +			.base	= S5P6440_GPH(0),
> +			.ngpio	= S5P6440_GPIO_H_NR,
> +			.label	= "GPH",
> +		},
> +	},
> +};
> +
> +static struct s3c_gpio_chip gpio_rbank_4bit2[] = {
> +	{
> +		.base	= S5P6440_GPR_BASE + 0x4,
> +		.config	= &s5p6440_gpio_cfgs[2],
> +		.chip	= {
> +			.base	= S5P6440_GPR(0),
> +			.ngpio	= S5P6440_GPIO_R_NR,
> +			.label	= "GPR",
> +		},
> +	},
> +};
> +
> +static struct s3c_gpio_chip s5p6440_gpio_2bit[] = {
> +	{
> +		.base	= S5P6440_GPF_BASE,
> +		.config	= &s5p6440_gpio_cfgs[5],
> +		.chip	= {
> +			.base	= S5P6440_GPF(0),
> +			.ngpio	= S5P6440_GPIO_F_NR,
> +			.label	= "GPF",
> +		},
> +	}, {
> +		.base	= S5P6440_GPI_BASE,
> +		.config	= &s5p6440_gpio_cfgs[3],
> +		.chip	= {
> +			.base	= S5P6440_GPI(0),
> +			.ngpio	= S5P6440_GPIO_I_NR,
> +			.label	= "GPI",
> +		},
> +	}, {
> +		.base	= S5P6440_GPJ_BASE,
> +		.config	= &s5p6440_gpio_cfgs[3],
> +		.chip	= {
> +			.base	= S5P6440_GPJ(0),
> +			.ngpio	= S5P6440_GPIO_J_NR,
> +			.label	= "GPJ",
> +		},
> +	}, {
> +		.base	= S5P6440_GPN_BASE,
> +		.config	= &s5p6440_gpio_cfgs[4],
> +		.chip	= {
> +			.base	= S5P6440_GPN(0),
> +			.ngpio	= S5P6440_GPIO_N_NR,
> +			.label	= "GPN",
> +		},
> +	}, {
> +		.base	= S5P6440_GPP_BASE,
> +		.config	= &s5p6440_gpio_cfgs[5],
> +		.chip	= {
> +			.base	= S5P6440_GPP(0),
> +			.ngpio	= S5P6440_GPIO_P_NR,
> +			.label	= "GPP",
> +		},
> +	},
> +};
> +
> +void __init s5p6440_gpiolib_set_cfg(struct s3c_gpio_cfg *chipcfg, int nr_chips)
> +{
> +	for (; nr_chips > 0; nr_chips--, chipcfg++) {
> +		if (!chipcfg->set_config)
> +			chipcfg->set_config	= s3c_gpio_setcfg_s3c64xx_4bit;
> +		if (!chipcfg->set_pull)
> +			chipcfg->set_pull	= s3c_gpio_setpull_updown;
> +		if (!chipcfg->get_pull)
> +			chipcfg->get_pull	= s3c_gpio_getpull_updown;
> +	}
> +}
> +
> +static void __init s5p6440_gpio_add_rbank_4bit2(struct s3c_gpio_chip *chip,
> +						int nr_chips)
> +{
> +	for (; nr_chips > 0; nr_chips--, chip++) {
> +		chip->chip.direction_input = s5p6440_gpiolib_rbank_4bit2_input;
> +		chip->chip.direction_output =
> +					s5p6440_gpiolib_rbank_4bit2_output;
> +		s3c_gpiolib_add(chip);
> +	}
> +}
> +
> +static int __init s5p6440_gpiolib_init(void)
> +{
> +	struct s3c_gpio_chip *chips = s5p6440_gpio_2bit;
> +	int nr_chips = ARRAY_SIZE(s5p6440_gpio_2bit);
> +
> +	s5p6440_gpiolib_set_cfg(s5p6440_gpio_cfgs,
> +				ARRAY_SIZE(s5p6440_gpio_cfgs));
> +
> +	for (; nr_chips > 0; nr_chips--, chips++)
> +		s3c_gpiolib_add(chips);
> +
> +	samsung_gpiolib_add_4bit_chips(s5p6440_gpio_4bit,
> +				ARRAY_SIZE(s5p6440_gpio_4bit));
> +
> +	samsung_gpiolib_add_4bit2_chips(s5p6440_gpio_4bit2,
> +				ARRAY_SIZE(s5p6440_gpio_4bit2));
> +
> +	s5p6440_gpio_add_rbank_4bit2(gpio_rbank_4bit2,
> +				ARRAY_SIZE(gpio_rbank_4bit2));
> +
> +	return 0;
> +}
> +arch_initcall(s5p6440_gpiolib_init);
> diff --git a/arch/arm/plat-s5p/Kconfig b/arch/arm/plat-s5p/Kconfig
> index 7e08b40..9d8686c 100644
> --- a/arch/arm/plat-s5p/Kconfig
> +++ b/arch/arm/plat-s5p/Kconfig
> @@ -14,6 +14,10 @@ config PLAT_S5P
>  	select NO_IOPORT
>  	select ARCH_REQUIRE_GPIOLIB
>  	select S3C_GPIO_TRACK
> +	select SAMSUNG_GPIOLIB
> +	select S3C_GPIO_CFG_S3C64XX
> +	select S3C_GPIO_PULL_UPDOWN
> +	select S3C_GPIO_CFG_S3C24XX
>  	select PLAT_SAMSUNG
>  	select SAMSUNG_CLKSRC
>  	select SAMSUNG_IRQ_VIC_TIMER
> -- 
> 1.6.0.4
> 

-- 
-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.