ARM: S5P6440: Add support for I2C channel 0 and 1 on SMDK6440

This patch adds helper functions for I2C channel 0 and 1, GPIO
configurations for I2C on S5P6440 and support I2C-0/1 devices
on SMDK6440.

Signed-off-by: Naveen Krishna Ch <ch.naveen@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

Conflicts:

	arch/arm/mach-s5p6440/Kconfig
	arch/arm/mach-s5p6440/include/mach/map.h
	arch/arm/mach-s5p6440/mach-smdk6440.c

6 files changed, 66 insertions, 1 deletions

diff --git a/arch/arm/mach-s5p6440/Kconfig b/arch/arm/mach-s5p6440/Kconfig
index b2d471653975..153f8c9994c8 100644
--- a/arch/arm/mach-s5p6440/Kconfig
+++ b/arch/arm/mach-s5p6440/Kconfig
@@ -13,15 +13,22 @@ config CPU_S5P6440
         help
           Enable S5P6440 CPU support
 
+config S5P6440_SETUP_I2C1
+        bool
+        help
+          Common setup code for i2c bus 1.
+
 config MACH_SMDK6440
         bool "SMDK6440"
         select CPU_S5P6440
         select SAMSUNG_DEV_TS
         select SAMSUNG_DEV_ADC
         select S3C_DEV_RTC
+        select S3C_DEV_I2C1
         select S3C_DEV_WDT
         select HAVE_S3C_RTC
         select HAVE_S3C2410_WATCHDOG
+        select S5P6440_SETUP_I2C1
         help
           Machine support for the Samsung SMDK6440
 
diff --git a/arch/arm/mach-s5p6440/Makefile b/arch/arm/mach-s5p6440/Makefile
index be3c53aab23f..c3fe4d3662a9 100644
--- a/arch/arm/mach-s5p6440/Makefile
+++ b/arch/arm/mach-s5p6440/Makefile
@@ -22,3 +22,4 @@ obj-$(CONFIG_MACH_SMDK6440)	+= mach-smdk6440.o
 # device support
 obj-y                           += dev-audio.o
 obj-$(CONFIG_S3C64XX_DEV_SPI)   += dev-spi.o
+obj-$(CONFIG_S5P6440_SETUP_I2C1)        += setup-i2c1.o
diff --git a/arch/arm/mach-s5p6440/include/mach/map.h b/arch/arm/mach-s5p6440/include/mach/map.h
index 255a2e7f0b9a..6cc5cbc88ffb 100644
--- a/arch/arm/mach-s5p6440/include/mach/map.h
+++ b/arch/arm/mach-s5p6440/include/mach/map.h
@@ -52,6 +52,7 @@
 #define S5P_SZ_UART             SZ_256
 
 #define S5P6440_PA_IIC0         (0xEC104000)
+#define S5P6440_PA_IIC1         (0xEC20F000)
 
 #define S5P6440_PA_SPI0         0xEC400000
 #define S5P6440_PA_SPI1         0xEC500000
@@ -77,6 +78,7 @@
 #define S3C_PA_UART             S5P6440_PA_UART
 #define S3C_PA_IIC              S5P6440_PA_IIC0
 #define S3C_PA_RTC              S5P6440_PA_RTC
+#define S3C_PA_IIC1             S5P6440_PA_IIC1
 #define S3C_PA_WDT              S5P6440_PA_WDT
 
 #define SAMSUNG_PA_ADC          S5P6440_PA_ADC
diff --git a/arch/arm/mach-s5p6440/mach-smdk6440.c b/arch/arm/mach-s5p6440/mach-smdk6440.c
index 142edd57a9da..8c83d8fb0162 100644
--- a/arch/arm/mach-s5p6440/mach-smdk6440.c
+++ b/arch/arm/mach-s5p6440/mach-smdk6440.c
@@ -15,6 +15,7 @@
 #include <linux/timer.h>
 #include <linux/delay.h>
 #include <linux/init.h>
+#include <linux/i2c.h>
 #include <linux/serial_core.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
@@ -37,6 +38,7 @@
 #include <mach/regs-clock.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/iic.h>
 #include <plat/pll.h>
 #include <plat/adc.h>
 #include <plat/ts.h>
@@ -89,10 +91,20 @@ static struct platform_device *smdk6440_devices[] __initdata = {
         &s5p6440_device_iis,
         &s3c_device_adc,
         &s3c_device_rtc,
+        &s3c_device_i2c0,
+        &s3c_device_i2c1,
         &s3c_device_ts,
         &s3c_device_wdt,
 };
 
+static struct i2c_board_info smdk6440_i2c_devs0[] __initdata = {
+        { I2C_BOARD_INFO("24c08", 0x50), },
+};
+
+static struct i2c_board_info smdk6440_i2c_devs1[] __initdata = {
+        /* To be populated */
+};
+
 static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
         .delay                  = 10000,
         .presc                  = 49,
@@ -110,6 +122,14 @@ static void __init smdk6440_machine_init(void)
 {
         s3c24xx_ts_set_platdata(&s3c_ts_platform);
 
+        /* I2C */
+        s3c_i2c0_set_platdata(NULL);
+        s3c_i2c1_set_platdata(NULL);
+        i2c_register_board_info(0, smdk6440_i2c_devs0,
+                        ARRAY_SIZE(smdk6440_i2c_devs0));
+        i2c_register_board_info(1, smdk6440_i2c_devs1,
+                        ARRAY_SIZE(smdk6440_i2c_devs1));
+
         platform_add_devices(smdk6440_devices, ARRAY_SIZE(smdk6440_devices));
 }
 
diff --git a/arch/arm/mach-s5p6440/setup-i2c0.c b/arch/arm/mach-s5p6440/setup-i2c0.c
index 69e8a664aedb..2c99d14f7ac7 100644
--- a/arch/arm/mach-s5p6440/setup-i2c0.c
+++ b/arch/arm/mach-s5p6440/setup-i2c0.c
@@ -17,9 +17,14 @@
 
 struct platform_device; /* don't need the contents */
 
+#include <linux/gpio.h>
+#include <plat/gpio-cfg.h>
 #include <plat/iic.h>
 
 void s3c_i2c0_cfg_gpio(struct platform_device *dev)
 {
-        /* Will be populated later */
+        s3c_gpio_cfgpin(S5P6440_GPB(5), S3C_GPIO_SFN(2));
+        s3c_gpio_setpull(S5P6440_GPB(5), S3C_GPIO_PULL_UP);
+        s3c_gpio_cfgpin(S5P6440_GPB(6), S3C_GPIO_SFN(2));
+        s3c_gpio_setpull(S5P6440_GPB(6), S3C_GPIO_PULL_UP);
 }
diff --git a/arch/arm/mach-s5p6440/setup-i2c1.c b/arch/arm/mach-s5p6440/setup-i2c1.c
new file mode 100644
index 000000000000..9a1537f786e0
--- /dev/null
+++ b/arch/arm/mach-s5p6440/setup-i2c1.c
@@ -0,0 +1,30 @@
+/* linux/arch/arm/mach-s5p6440/setup-i2c1.c
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com/
+ *
+ * I2C1 GPIO configuration.
+ *
+ * Based on plat-s3c64xx/setup-i2c0.c
+ *
+ * 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/types.h>
+#include <linux/gpio.h>
+
+struct platform_device; /* don't need the contents */
+
+#include <plat/gpio-cfg.h>
+#include <plat/iic.h>
+
+void s3c_i2c1_cfg_gpio(struct platform_device *dev)
+{
+        s3c_gpio_cfgpin(S5P6440_GPR(9), S3C_GPIO_SFN(6));
+        s3c_gpio_setpull(S5P6440_GPR(9), S3C_GPIO_PULL_UP);
+        s3c_gpio_cfgpin(S5P6440_GPR(10), S3C_GPIO_SFN(6));
+        s3c_gpio_setpull(S5P6440_GPR(10), S3C_GPIO_PULL_UP);
+}