ARM: S5PC1xx: add platform helpers for i2c adapter devices

Samsung S5PC100 has I2C bus controller compatible with the one known from
previous SoCs series. Add required platform setup and support code that
it can be used with s3c2410-i2c driver.

Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

5 files changed, 20 insertions, 6 deletions

diff --git a/arch/arm/mach-s5pc100/cpu.c b/arch/arm/mach-s5pc100/cpu.c
index a23ca5795bc..1319e3d0ec3 100644
--- a/arch/arm/mach-s5pc100/cpu.c
+++ b/arch/arm/mach-s5pc100/cpu.c
@@ -75,6 +75,10 @@ void __init s5pc100_map_io(void)
 	iotable_init(s5pc100_iodesc, ARRAY_SIZE(s5pc100_iodesc));
 
 	/* initialise device information early */
+
+	/* the i2c devices are directly compatible with s3c2440 */
+	s3c_i2c0_setname("s3c2440-i2c");
+	s3c_i2c1_setname("s3c2440-i2c");
 }
 
 void __init s5pc100_init_clocks(int xtal)
diff --git a/arch/arm/plat-s5pc1xx/Kconfig b/arch/arm/plat-s5pc1xx/Kconfig
index 6ac48a6fba7..1fc25b9f224 100644
--- a/arch/arm/plat-s5pc1xx/Kconfig
+++ b/arch/arm/plat-s5pc1xx/Kconfig
@@ -42,7 +42,7 @@ config S5PC1XX_SETUP_FB_24BPP
 	help
           Common setup code for S5PC1XX with an 24bpp RGB display helper.
 
-config S5PC100_SETUP_I2C0
+config S5PC1XX_SETUP_I2C0
 	bool
 	default y
 	help
@@ -51,7 +51,7 @@ config S5PC100_SETUP_I2C0
 	  Note, currently since i2c0 is always compiled, this setup helper
 	  is always compiled with it.
 
-config S5PC100_SETUP_I2C1
+config S5PC1XX_SETUP_I2C1
 	bool
 	help
 	  Common setup code for i2c bus 1.
diff --git a/arch/arm/plat-s5pc1xx/Makefile b/arch/arm/plat-s5pc1xx/Makefile
index 3d2ac7150b1..40ee9571fb0 100644
--- a/arch/arm/plat-s5pc1xx/Makefile
+++ b/arch/arm/plat-s5pc1xx/Makefile
@@ -26,5 +26,5 @@ obj-$(CONFIG_CPU_S5PC100_CLOCK)	+= s5pc100-clock.o
 
 obj-$(CONFIG_S5P_GPIO_CFG_S5PC1XX) += gpio-config.o
 obj-$(CONFIG_S5PC1XX_SETUP_FB_24BPP) += setup-fb-24bpp.o
-obj-$(CONFIG_S5PC100_SETUP_I2C0) += setup-i2c0.o
-obj-$(CONFIG_S5PC100_SETUP_I2C1) += setup-i2c1.o
+obj-$(CONFIG_S5PC1XX_SETUP_I2C0) += setup-i2c0.o
+obj-$(CONFIG_S5PC1XX_SETUP_I2C1) += setup-i2c1.o
diff --git a/arch/arm/plat-s5pc1xx/setup-i2c0.c b/arch/arm/plat-s5pc1xx/setup-i2c0.c
index 3d00c025fff..5e4a7c3a231 100644
--- a/arch/arm/plat-s5pc1xx/setup-i2c0.c
+++ b/arch/arm/plat-s5pc1xx/setup-i2c0.c
@@ -17,9 +17,14 @@
 
 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)
 {
-	/* Pin configuration would be needed */
+	s3c_gpio_cfgpin(S5PC100_GPD(3), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S5PC100_GPD(3), S3C_GPIO_PULL_UP);
+	s3c_gpio_cfgpin(S5PC100_GPD(4), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S5PC100_GPD(4), S3C_GPIO_PULL_UP);
 }
diff --git a/arch/arm/plat-s5pc1xx/setup-i2c1.c b/arch/arm/plat-s5pc1xx/setup-i2c1.c
index c8f3ca42f51..a0a8b4ae6ad 100644
--- a/arch/arm/plat-s5pc1xx/setup-i2c1.c
+++ b/arch/arm/plat-s5pc1xx/setup-i2c1.c
@@ -17,9 +17,14 @@
 
 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)
 {
-	/* Pin configuration would be needed */
+	s3c_gpio_cfgpin(S5PC100_GPD(5), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S5PC100_GPD(5), S3C_GPIO_PULL_UP);
+	s3c_gpio_cfgpin(S5PC100_GPD(6), S3C_GPIO_SFN(2));
+	s3c_gpio_setpull(S5PC100_GPD(6), S3C_GPIO_PULL_UP);
 }