ARM: S5PC100: Add PWM backlight support on SMDKC100

This patch adds support for LCD backlight using PWM timer for
Samsung SMDKC100 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-s5pc100/Kconfig b/arch/arm/mach-s5pc100/Kconfig
index 608722ff4f2856d04d3bae15117b738350a9834f..e8a33c4b054cca68c90ce759bd2df5e9198bbf70 100644 (file)
--- a/arch/arm/mach-s5pc100/Kconfig
+++ b/arch/arm/mach-s5pc100/Kconfig
@@ -56,6 +56,7 @@ config MACH_SMDKC100
        select S3C_DEV_RTC
        select S3C_DEV_WDT
        select SAMSUNG_DEV_ADC
+       select SAMSUNG_DEV_BACKLIGHT
        select SAMSUNG_DEV_IDE
        select SAMSUNG_DEV_KEYPAD
        select SAMSUNG_DEV_PWM

diff --git a/arch/arm/mach-s5pc100/mach-smdkc100.c b/arch/arm/mach-s5pc100/mach-smdkc100.c
index 0525cb3ef406cfd40b104fe32a5be2bc54930df3..c89d6ecb450d862dd9bbc5cc260c4b780f625b4e 100644 (file)
--- a/arch/arm/mach-s5pc100/mach-smdkc100.c
+++ b/arch/arm/mach-s5pc100/mach-smdkc100.c
@@ -51,6 +51,7 @@
 #include <plat/keypad.h>
 #include <plat/ts.h>
 #include <plat/audio.h>
+#include <plat/backlight.h>
 
 /* Following are default values for UCON, ULCON and UFCON UART registers */
 #define SMDKC100_UCON_DEFAULT  (S3C2410_UCON_TXILEVEL |        \
@@ -179,45 +180,6 @@ static struct samsung_keypad_platdata smdkc100_keypad_data __initdata = {
        .cols           = 8,
 };
 
-static int smdkc100_backlight_init(struct device *dev)
-{
-       int ret;
-
-       ret = gpio_request(S5PC100_GPD(0), "Backlight");
-       if (ret) {
-               printk(KERN_ERR "failed to request GPF for PWM-OUT0\n");
-               return ret;
-       }
-
-       /* Configure GPIO pin with S5PC100_GPD_TOUT_0 */
-       s3c_gpio_cfgpin(S5PC100_GPD(0), S3C_GPIO_SFN(2));
-
-       return 0;
-}
-
-static void smdkc100_backlight_exit(struct device *dev)
-{
-       s3c_gpio_cfgpin(S5PC100_GPD(0), S3C_GPIO_OUTPUT);
-       gpio_free(S5PC100_GPD(0));
-}
-
-static struct platform_pwm_backlight_data smdkc100_backlight_data = {
-       .pwm_id         = 0,
-       .max_brightness = 255,
-       .dft_brightness = 255,
-       .pwm_period_ns  = 78770,
-       .init           = smdkc100_backlight_init,
-       .exit           = smdkc100_backlight_exit,
-};
-
-static struct platform_device smdkc100_backlight_device = {
-       .name           = "pwm-backlight",
-       .dev            = {
-               .parent         = &s3c_device_timer[0].dev,
-               .platform_data  = &smdkc100_backlight_data,
-       },
-};
-
 static struct platform_device *smdkc100_devices[] __initdata = {
        &s3c_device_adc,
        &s3c_device_cfcon,
@@ -239,8 +201,6 @@ static struct platform_device *smdkc100_devices[] __initdata = {
        &s5p_device_fimc1,
        &s5p_device_fimc2,
        &s5pc100_device_spdif,
-       &s3c_device_timer[0],
-       &smdkc100_backlight_device,
 };
 
 static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
@@ -249,6 +209,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
        .oversampling_shift     = 2,
 };
 
+/* LCD Backlight data */
+static struct samsung_bl_gpio_info smdkc100_bl_gpio_info = {
+       .no = S5PC100_GPD(0),
+       .func = S3C_GPIO_SFN(2),
+};
+
+static struct platform_pwm_backlight_data smdkc100_bl_data = {
+       .pwm_id = 0,
+};
+
 static void __init smdkc100_map_io(void)
 {
        s5p_init_io(NULL, 0, S5P_VA_CHIPID);
@@ -276,6 +246,9 @@ static void __init smdkc100_machine_init(void)
        /* LCD init */
        gpio_request(S5PC100_GPH0(6), "GPH0");
        smdkc100_lcd_power_set(&smdkc100_lcd_power_data, 0);
+
+       samsung_bl_set(&smdkc100_bl_gpio_info, &smdkc100_bl_data);
+
        platform_add_devices(smdkc100_devices, ARRAY_SIZE(smdkc100_devices));
 }