ARM: EXYNOS4: Add PWM backlight support on SMDKV310

This patch adds support for LCD backlight using PWM timer for
Samsung SMDKV310 board.

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

diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig
index 1435fc3..413448f 100644 (file)
--- a/arch/arm/mach-exynos4/Kconfig
+++ b/arch/arm/mach-exynos4/Kconfig
@@ -127,8 +127,10 @@ config MACH_SMDKV310
        select S3C_DEV_HSMMC1
        select S3C_DEV_HSMMC2
        select S3C_DEV_HSMMC3
+       select SAMSUNG_DEV_BACKLIGHT
        select SAMSUNG_DEV_KEYPAD
        select EXYNOS4_DEV_PD
+       select SAMSUNG_DEV_PWM
        select EXYNOS4_DEV_SYSMMU
        select EXYNOS4_SETUP_I2C1
        select EXYNOS4_SETUP_KEYPAD

diff --git a/arch/arm/mach-exynos4/mach-smdkv310.c b/arch/arm/mach-exynos4/mach-smdkv310.c
index edd8141..df11078 100644 (file)
--- a/arch/arm/mach-exynos4/mach-smdkv310.c
+++ b/arch/arm/mach-exynos4/mach-smdkv310.c
@@ -16,6 +16,7 @@
 #include <linux/io.h>
 #include <linux/i2c.h>
 #include <linux/input.h>
+#include <linux/pwm_backlight.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
@@ -29,6 +30,8 @@
 #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>
 
@@ -209,6 +212,17 @@ static void __init smdkv310_smsc911x_init(void)
                     (0x1 << S5P_SROM_BCX__TACS__SHIFT), S5P_SROM_BC1);
 }
 
+/* LCD Backlight data */
+static struct samsung_bl_gpio_info smdkv310_bl_gpio_info = {
+       .no = EXYNOS4_GPD0(1),
+       .func = S3C_GPIO_SFN(2),
+};
+
+static struct platform_pwm_backlight_data smdkv310_bl_data = {
+       .pwm_id = 1,
+       .pwm_period_ns  = 1000,
+};
+
 static void __init smdkv310_map_io(void)
 {
        s5p_init_io(NULL, 0, S5P_VA_CHIPID);
@@ -230,6 +244,8 @@ static void __init smdkv310_machine_init(void)
 
        samsung_keypad_set_platdata(&smdkv310_keypad_data);
 
+       samsung_bl_set(&smdkv310_bl_gpio_info, &smdkv310_bl_data);
+
        platform_add_devices(smdkv310_devices, ARRAY_SIZE(smdkv310_devices));
 }