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 017af4c..34e2877 100644
--- a/arch/arm/mach-s5p64x0/Kconfig
+++ b/arch/arm/mach-s5p64x0/Kconfig
@@ -36,6 +36,7 @@
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 2d559f1..346f8df 100644
--- 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 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 @@
&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 @@
.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 @@
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));
}
