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>

5 files changed, 75 insertions, 2 deletions

diff --git a/arch/arm/mach-s5pv310/Kconfig b/arch/arm/mach-s5pv310/Kconfig
index 24ef3cd5b4bc..f9b189234387 100644
--- a/arch/arm/mach-s5pv310/Kconfig
+++ b/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
diff --git a/arch/arm/mach-s5pv310/Makefile b/arch/arm/mach-s5pv310/Makefile
index 56e7693ad861..967e2c8f7c0b 100644
--- a/arch/arm/mach-s5pv310/Makefile
+++ b/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
diff --git a/arch/arm/mach-s5pv310/setup-i2c0.c b/arch/arm/mach-s5pv310/setup-i2c0.c
index d4f5a8106946..436712807383 100644
--- a/arch/arm/mach-s5pv310/setup-i2c0.c
+++ b/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);
 }
diff --git a/arch/arm/mach-s5pv310/setup-i2c1.c b/arch/arm/mach-s5pv310/setup-i2c1.c
new file mode 100644
index 000000000000..1ecd5bc35b5a
--- /dev/null
+++ b/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);
+}
diff --git a/arch/arm/mach-s5pv310/setup-i2c2.c b/arch/arm/mach-s5pv310/setup-i2c2.c
new file mode 100644
index 000000000000..4c0d8def660a
--- /dev/null
+++ b/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);
+}