ARM: S5PV210: Add PWM backlight support on SMDKV210

This patch adds support for LCD backlight using PWM timer for
Samsung SMDKV210 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-s5pv210/Kconfig b/arch/arm/mach-s5pv210/Kconfig
index 37b5a97..79bb3a0 100644 (file)
--- a/arch/arm/mach-s5pv210/Kconfig
+++ b/arch/arm/mach-s5pv210/Kconfig
@@ -134,6 +134,7 @@ config MACH_SMDKV210
        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-s5pv210/mach-smdkv210.c b/arch/arm/mach-s5pv210/mach-smdkv210.c
index c6a9e86..c4d9b7d 100644 (file)
--- a/arch/arm/mach-s5pv210/mach-smdkv210.c
+++ b/arch/arm/mach-s5pv210/mach-smdkv210.c
@@ -45,6 +45,7 @@
 #include <plat/pm.h>
 #include <plat/fb.h>
 #include <plat/s5p-time.h>
+#include <plat/backlight.h>
 
 /* Following are default values for UCON, ULCON and UFCON UART registers */
 #define SMDKV210_UCON_DEFAULT  (S3C2410_UCON_TXILEVEL |        \
@@ -210,45 +211,6 @@ static struct s3c_fb_platdata smdkv210_lcd0_pdata __initdata = {
        .setup_gpio     = s5pv210_fb_gpio_setup_24bpp,
 };
 
-static int smdkv210_backlight_init(struct device *dev)
-{
-       int ret;
-
-       ret = gpio_request(S5PV210_GPD0(3), "Backlight");
-       if (ret) {
-               printk(KERN_ERR "failed to request GPD for PWM-OUT 3\n");
-               return ret;
-       }
-
-       /* Configure GPIO pin with S5PV210_GPD_0_3_TOUT_3 */
-       s3c_gpio_cfgpin(S5PV210_GPD0(3), S3C_GPIO_SFN(2));
-
-       return 0;
-}
-
-static void smdkv210_backlight_exit(struct device *dev)
-{
-       s3c_gpio_cfgpin(S5PV210_GPD0(3), S3C_GPIO_OUTPUT);
-       gpio_free(S5PV210_GPD0(3));
-}
-
-static struct platform_pwm_backlight_data smdkv210_backlight_data = {
-       .pwm_id         = 3,
-       .max_brightness = 255,
-       .dft_brightness = 255,
-       .pwm_period_ns  = 78770,
-       .init           = smdkv210_backlight_init,
-       .exit           = smdkv210_backlight_exit,
-};
-
-static struct platform_device smdkv210_backlight_device = {
-       .name           = "pwm-backlight",
-       .dev            = {
-               .parent         = &s3c_device_timer[3].dev,
-               .platform_data  = &smdkv210_backlight_data,
-       },
-};
-
 static struct platform_device *smdkv210_devices[] __initdata = {
        &s3c_device_adc,
        &s3c_device_cfcon,
@@ -270,8 +232,6 @@ static struct platform_device *smdkv210_devices[] __initdata = {
        &samsung_device_keypad,
        &smdkv210_dm9000,
        &smdkv210_lcd_lte480wv,
-       &s3c_device_timer[3],
-       &smdkv210_backlight_device,
 };
 
 static void __init smdkv210_dm9000_init(void)
@@ -310,6 +270,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
        .oversampling_shift     = 2,
 };
 
+/* LCD Backlight data */
+static struct samsung_bl_gpio_info smdkv210_bl_gpio_info = {
+       .no = S5PV210_GPD0(3),
+       .func = S3C_GPIO_SFN(2),
+};
+
+static struct platform_pwm_backlight_data smdkv210_bl_data = {
+       .pwm_id = 3,
+};
+
 static void __init smdkv210_map_io(void)
 {
        s5p_init_io(NULL, 0, S5P_VA_CHIPID);
@@ -341,6 +311,8 @@ static void __init smdkv210_machine_init(void)
 
        s3c_fb_set_platdata(&smdkv210_lcd0_pdata);
 
+       samsung_bl_set(&smdkv210_bl_gpio_info, &smdkv210_bl_data);
+
        platform_add_devices(smdkv210_devices, ARRAY_SIZE(smdkv210_devices));
 }