From: Banajit Goswami <banajit.g@samsung.com>
Date: Wed, 20 Jul 2011 14:45:22 +0000 (+0900)
Subject: ARM: S5P64X0: Add PWM backlight support on SMDK6440
X-Git-Tag: firefly_0821_release~3680^2~4940^2^2~13
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=499d2969574d138b9f5c8bbb911027005f4f9ed9;p=firefly-linux-kernel-4.4.55.git

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 017af4c4293c..34e287719f0f 100644
--- 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 2d559f10fd47..346f8dfa6f35 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 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));
 }