ARM: S5PV310: Add I2C channel 0, 1 and 2 support

This patch adds configuration of proper mux pins for support
I2C channel 0, 1, and 2 on S5PV310/S5PC210.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: coding-style and minor comment fixes]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-s5pv310/Kconfig

@@ -15,6 +15,16 @@ config CPU_S5PV310
 	help
 	  Enable S5PV310 CPU support
 
+config S5PV310_SETUP_I2C1
+	bool
+	help
+	  Common setup code for i2c bus 1.
+
+config S5PV310_SETUP_I2C2
+	bool
+	help
+	  Common setup code for i2c bus 2.
+
 # machine support
 
 config MACH_SMDKV310

arch/arm/mach-s5pv310/Makefile

@@ -22,3 +22,8 @@ obj-$(CONFIG_HOTPLUG_CPU)	+= hotplug.o
 # machine support
 
 obj-$(CONFIG_MACH_SMDKV310)	+= mach-smdkv310.o
+
+# device support
+
+obj-$(CONFIG_S5PV310_SETUP_I2C1)	+= setup-i2c1.o
+obj-$(CONFIG_S5PV310_SETUP_I2C2)	+= setup-i2c2.o

arch/arm/mach-s5pv310/setup-i2c0.c

@@ -1,4 +1,5 @@
-/* linux/arch/arm/mach-s5pv210/setup-i2c0.c
+/*
+ * linux/arch/arm/mach-s5pv310/setup-i2c0.c
  *
  * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com/
@@ -14,7 +15,14 @@
 
 struct platform_device; /* don't need the contents */
 
+#include <linux/gpio.h>
+#include <plat/iic.h>
+#include <plat/gpio-cfg.h>
+
 void s3c_i2c0_cfg_gpio(struct platform_device *dev)
 {
-/* will be implemented later */
+	s3c_gpio_cfgpin(S5PV310_GPD1(0), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S5PV310_GPD1(0), S3C_GPIO_PULL_UP);
+	s3c_gpio_cfgpin(S5PV310_GPD1(1), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S5PV310_GPD1(1), S3C_GPIO_PULL_UP);
 }

arch/arm/mach-s5pv310/setup-i2c1.c

@@ -0,0 +1,25 @@
+/*
+ * linux/arch/arm/mach-s5pv310/setup-i2c1.c
+ *
+ * Copyright (C) 2010 Samsung Electronics Co., Ltd.
+ *
+ * I2C1 GPIO configuration.
+ *
+ * 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.
+*/
+
+struct platform_device; /* don't need the contents */
+
+#include <linux/gpio.h>
+#include <plat/iic.h>
+#include <plat/gpio-cfg.h>
+
+void s3c_i2c1_cfg_gpio(struct platform_device *dev)
+{
+	s3c_gpio_cfgpin(S5PV310_GPD1(2), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S5PV310_GPD1(2), S3C_GPIO_PULL_UP);
+	s3c_gpio_cfgpin(S5PV310_GPD1(3), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S5PV310_GPD1(3), S3C_GPIO_PULL_UP);
+}

arch/arm/mach-s5pv310/setup-i2c2.c

@@ -0,0 +1,25 @@
+/*
+ * linux/arch/arm/mach-s5pv310/setup-i2c2.c
+ *
+ * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
+ *
+ * I2C2 GPIO configuration.
+ *
+ * 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.
+*/
+
+struct platform_device; /* don't need the contents */
+
+#include <linux/gpio.h>
+#include <plat/iic.h>
+#include <plat/gpio-cfg.h>
+
+void s3c_i2c2_cfg_gpio(struct platform_device *dev)
+{
+	s3c_gpio_cfgpin(S5PV310_GPA0(6), S3C_GPIO_SFN(3));
+	s3c_gpio_setpull(S5PV310_GPA0(6), S3C_GPIO_PULL_UP);
+	s3c_gpio_cfgpin(S5PV310_GPA0(7), S3C_GPIO_SFN(3));
+	s3c_gpio_setpull(S5PV310_GPA0(7), S3C_GPIO_PULL_UP);
+}