ARM: S5P64X0: Add PWM backlight support on SMDK6440

This patch adds support for LCD backlight using PWM timer for
Samsung SMDK6440 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-s5p64x0/Kconfig b/arch/arm/mach-s5p64x0/Kconfig
index 017af4c4293c763757cd780aa63758682e3e6c88..34e287719f0ff68fb2baf88086aa21dbeb2ddf13 100644 (file)
--- a/arch/arm/mach-s5p64x0/Kconfig
+++ b/arch/arm/mach-s5p64x0/Kconfig
@@ -36,6 +36,7 @@ config MACH_SMDK6440
        select S3C_DEV_WDT
        select S3C64XX_DEV_SPI
        select SAMSUNG_DEV_ADC
+       select SAMSUNG_DEV_BACKLIGHT
        select SAMSUNG_DEV_PWM
        select SAMSUNG_DEV_TS
        select S5P64X0_SETUP_I2C1

diff --git a/arch/arm/mach-s5p64x0/mach-smdk6440.c b/arch/arm/mach-s5p64x0/mach-smdk6440.c
index 2d559f10fd473c4fc976d9aac45fa29e2262af2e..346f8dfa6f3539d500fbcdbb88c70e4847d0c5e1 100644 (file)
--- a/arch/arm/mach-s5p64x0/mach-smdk6440.c
+++ b/arch/arm/mach-s5p64x0/mach-smdk6440.c
@@ -46,6 +46,7 @@
 #include <plat/adc.h>
 #include <plat/ts.h>
 #include <plat/s5p-time.h>
+#include <plat/backlight.h>
 
 #define SMDK6440_UCON_DEFAULT  (S3C2410_UCON_TXILEVEL |        \
                                S3C2410_UCON_RXILEVEL |         \
@@ -91,45 +92,6 @@ static struct s3c2410_uartcfg smdk6440_uartcfgs[] __initdata = {
        },
 };
 
-static int smdk6440_backlight_init(struct device *dev)
-{
-       int ret;
-
-       ret = gpio_request(S5P6440_GPF(15), "Backlight");
-       if (ret) {
-               printk(KERN_ERR "failed to request GPF for PWM-OUT1\n");
-               return ret;
-       }
-
-       /* Configure GPIO pin with S5P6440_GPF15_PWM_TOUT1 */
-       s3c_gpio_cfgpin(S5P6440_GPF(15), S3C_GPIO_SFN(2));
-
-       return 0;
-}
-
-static void smdk6440_backlight_exit(struct device *dev)
-{
-       s3c_gpio_cfgpin(S5P6440_GPF(15), S3C_GPIO_OUTPUT);
-       gpio_free(S5P6440_GPF(15));
-}
-
-static struct platform_pwm_backlight_data smdk6440_backlight_data = {
-       .pwm_id         = 1,
-       .max_brightness = 255,
-       .dft_brightness = 255,
-       .pwm_period_ns  = 78770,
-       .init           = smdk6440_backlight_init,
-       .exit           = smdk6440_backlight_exit,
-};
-
-static struct platform_device smdk6440_backlight_device = {
-       .name           = "pwm-backlight",
-       .dev            = {
-               .parent         = &s3c_device_timer[1].dev,
-               .platform_data  = &smdk6440_backlight_data,
-       },
-};
-
 static struct platform_device *smdk6440_devices[] __initdata = {
        &s3c_device_adc,
        &s3c_device_rtc,
@@ -139,8 +101,6 @@ static struct platform_device *smdk6440_devices[] __initdata = {
        &s3c_device_wdt,
        &samsung_asoc_dma,
        &s5p6440_device_iis,
-       &s3c_device_timer[1],
-       &smdk6440_backlight_device,
 };
 
 static struct s3c2410_platform_i2c s5p6440_i2c0_data __initdata = {
@@ -175,6 +135,16 @@ static struct s3c2410_ts_mach_info s3c_ts_platform __initdata = {
        .oversampling_shift     = 2,
 };
 
+/* LCD Backlight data */
+static struct samsung_bl_gpio_info smdk6440_bl_gpio_info = {
+       .no = S5P6440_GPF(15),
+       .func = S3C_GPIO_SFN(2),
+};
+
+static struct platform_pwm_backlight_data smdk6440_bl_data = {
+       .pwm_id = 1,
+};
+
 static void __init smdk6440_map_io(void)
 {
        s5p_init_io(NULL, 0, S5P64X0_SYS_ID);
@@ -194,6 +164,8 @@ static void __init smdk6440_machine_init(void)
        i2c_register_board_info(1, smdk6440_i2c_devs1,
                        ARRAY_SIZE(smdk6440_i2c_devs1));
 
+       samsung_bl_set(&smdk6440_bl_gpio_info, &smdk6440_bl_data);
+
        platform_add_devices(smdk6440_devices, ARRAY_SIZE(smdk6440_devices));
 }