From: arnaud.patard@rtp-net.org <arnaud.patard@rtp-net.org>
Date: Tue, 17 Nov 2009 13:54:58 +0000 (+0100)
Subject: ARM: H1940: add lcd/backlight device definition
X-Git-Tag: v2.6.33-rc1~340^2~6^2~1
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=22e649ff2e162d3c6ce2a78c377863aab826a8b8;p=linux.git

ARM: H1940: add lcd/backlight device definition

Add lcd and backlight device definition. The pwm backlight stuff does
not allow to really set maximum pwm as with my custom driver but it's
better to use standard driver instead of out of tree driver.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
[ben-linux@fluff.org: tidy header]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
---

diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c
index 02375ca09497..49053254c98d 100644
--- a/arch/arm/mach-s3c2410/mach-h1940.c
+++ b/arch/arm/mach-s3c2410/mach-h1940.c
@@ -22,6 +22,8 @@
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
+#include <linux/pwm_backlight.h>
+#include <video/platform_lcd.h>
 
 #include <linux/mmc/host.h>
 
@@ -195,6 +197,73 @@ static struct s3c24xx_mci_pdata h1940_mmc_cfg = {
 	.ocr_avail     = MMC_VDD_32_33,
 };
 
+static int h1940_backlight_init(struct device *dev)
+{
+	gpio_request(S3C2410_GPB(0), "Backlight");
+
+	s3c2410_gpio_setpin(S3C2410_GPB(0), 0);
+	s3c2410_gpio_pullup(S3C2410_GPB(0), 0);
+	s3c2410_gpio_cfgpin(S3C2410_GPB(0), S3C2410_GPB0_TOUT0);
+
+	return 0;
+}
+
+static void h1940_backlight_exit(struct device *dev)
+{
+	s3c2410_gpio_cfgpin(S3C2410_GPB(0), 1/*S3C2410_GPB0_OUTP*/);
+}
+
+static struct platform_pwm_backlight_data backlight_data = {
+	.pwm_id         = 0,
+	.max_brightness = 100,
+	.dft_brightness = 50,
+	/* tcnt = 0x31 */
+	.pwm_period_ns  = 36296,
+	.init           = h1940_backlight_init,
+	.exit           = h1940_backlight_exit,
+};
+
+static struct platform_device h1940_backlight = {
+	.name = "pwm-backlight",
+	.dev  = {
+		.parent = &s3c_device_timer[0].dev,
+		.platform_data = &backlight_data,
+	},
+	.id   = -1,
+};
+
+static void h1940_lcd_power_set(struct plat_lcd_data *pd,
+					unsigned int power)
+{
+	int value;
+
+	if (!power) {
+		/* set to 3ec */
+		s3c2410_gpio_setpin(S3C2410_GPC(0), 0);
+		/* wait for 3ac */
+		do {
+			value = s3c2410_gpio_getpin(S3C2410_GPC(6));
+		} while (value);
+		/* set to 38c */
+		s3c2410_gpio_setpin(S3C2410_GPC(5), 0);
+	} else {
+		/* Set to 3ac */
+		s3c2410_gpio_setpin(S3C2410_GPC(5), 1);
+		/* Set to 3ad */
+		s3c2410_gpio_setpin(S3C2410_GPC(0), 1);
+	}
+}
+
+static struct plat_lcd_data h1940_lcd_power_data = {
+	.set_power      = h1940_lcd_power_set,
+};
+
+static struct platform_device h1940_lcd_powerdev = {
+	.name                   = "platform-lcd",
+	.dev.parent             = &s3c_device_lcd.dev,
+	.dev.platform_data      = &h1940_lcd_power_data,
+};
+
 static struct platform_device *h1940_devices[] __initdata = {
 	&s3c_device_usb,
 	&s3c_device_lcd,
@@ -206,6 +275,9 @@ static struct platform_device *h1940_devices[] __initdata = {
 	&h1940_device_bluetooth,
 	&s3c_device_sdi,
 	&s3c_device_rtc,
+	&s3c_device_timer[0],
+	&h1940_backlight,
+	&h1940_lcd_powerdev,
 };
 
 static void __init h1940_map_io(void)
@@ -249,6 +321,11 @@ static void __init h1940_init(void)
 	      | (0x03 << S3C24XX_PLLCON_SDIVSHIFT);
 	writel(tmp, S3C2410_UPLLCON);
 
+	gpio_request(S3C2410_GPC(0), "LCD power");
+	gpio_request(S3C2410_GPC(5), "LCD power");
+	gpio_request(S3C2410_GPC(6), "LCD power");
+
+
 	platform_add_devices(h1940_devices, ARRAY_SIZE(h1940_devices));
 }