ARM: EXYNOS4: Add PWM backlight support on SMDKC210

This patch adds support for LCD backlight using PWM timer for
Samsung SMDKC210 board.

Signed-off-by: Banajit Goswami <banajit.g@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig
index 413448f59e9b..ae433a052df6 100644
--- a/arch/arm/mach-exynos4/Kconfig
+++ b/arch/arm/mach-exynos4/Kconfig
@@ -110,6 +110,8 @@ config MACH_SMDKC210
         select S3C_DEV_HSMMC1
         select S3C_DEV_HSMMC2
         select S3C_DEV_HSMMC3
+        select SAMSUNG_DEV_PWM
+        select SAMSUNG_DEV_BACKLIGHT
         select EXYNOS4_DEV_PD
         select EXYNOS4_DEV_SYSMMU
         select EXYNOS4_SETUP_I2C1
diff --git a/arch/arm/mach-exynos4/mach-smdkc210.c b/arch/arm/mach-exynos4/mach-smdkc210.c
index e645f7a955f0..f606ea75bf43 100644
--- a/arch/arm/mach-exynos4/mach-smdkc210.c
+++ b/arch/arm/mach-exynos4/mach-smdkc210.c
@@ -15,6 +15,7 @@
 #include <linux/smsc911x.h>
 #include <linux/io.h>
 #include <linux/i2c.h>
+#include <linux/pwm_backlight.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
@@ -27,6 +28,8 @@
 #include <plat/sdhci.h>
 #include <plat/iic.h>
 #include <plat/pd.h>
+#include <plat/gpio-cfg.h>
+#include <plat/backlight.h>
 
 #include <mach/map.h>
 
@@ -191,6 +194,17 @@ static void __init smdkc210_smsc911x_init(void)
                      (0x1 << S5P_SROM_BCX__TACS__SHIFT), S5P_SROM_BC1);
 }
 
+/* LCD Backlight data */
+static struct samsung_bl_gpio_info smdkc210_bl_gpio_info = {
+        .no = EXYNOS4_GPD0(1),
+        .func = S3C_GPIO_SFN(2),
+};
+
+static struct platform_pwm_backlight_data smdkc210_bl_data = {
+        .pwm_id = 1,
+        .pwm_period_ns  = 1000,
+};
+
 static void __init smdkc210_map_io(void)
 {
         s5p_init_io(NULL, 0, S5P_VA_CHIPID);
@@ -210,6 +224,8 @@ static void __init smdkc210_machine_init(void)
         s3c_sdhci2_set_platdata(&smdkc210_hsmmc2_pdata);
         s3c_sdhci3_set_platdata(&smdkc210_hsmmc3_pdata);
 
+        samsung_bl_set(&smdkc210_bl_gpio_info, &smdkc210_bl_data);
+
         platform_add_devices(smdkc210_devices, ARRAY_SIZE(smdkc210_devices));
 }