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| author | Vasily Khoruzhick <anarsoul@gmail.com> | 2011-01-06 21:52:50 +0200 |
|---|---|---|
| committer | Ben Dooks <ben-linux@fluff.org> | 2011-03-20 23:14:55 +0000 |
| commit | 25d391cbe610009d2ea10d820f36621b7610c963 (patch) | |
| tree | e4e91407bd145793338eec7067337a297dd57036 /arch/arm/mach-s3c2410 | |
| parent | a8e99850d39cac11d03100aa9c40ebaea16e48c5 (diff) | |
| download | kernel_samsung_smdk4412-25d391cbe610009d2ea10d820f36621b7610c963.zip kernel_samsung_smdk4412-25d391cbe610009d2ea10d820f36621b7610c963.tar.gz kernel_samsung_smdk4412-25d391cbe610009d2ea10d820f36621b7610c963.tar.bz2 | |
ARM: S3C2410: H1940: Fix lcd_power_set function
Current implementation of lcd_power_set is not reliable, sometimes
it does not enable LCD at all.
Mimic WinCE behavior to fix this issue.
Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/mach-s3c2410')
| -rw-r--r-- | arch/arm/mach-s3c2410/mach-h1940.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c index a0116ef..882b32a 100644 --- a/arch/arm/mach-s3c2410/mach-h1940.c +++ b/arch/arm/mach-s3c2410/mach-h1940.c @@ -30,6 +30,7 @@ #include <linux/leds.h> #include <linux/pda_power.h> #include <linux/s3c_adc_battery.h> +#include <linux/delay.h> #include <video/platform_lcd.h> @@ -209,15 +210,15 @@ static struct s3c2410fb_mach_info h1940_fb_info __initdata = { .num_displays = 1, .default_display = 0, - .lpcsel= 0x02, - .gpccon= 0xaa940659, - .gpccon_mask= 0xffffffff, - .gpcup= 0x0000ffff, - .gpcup_mask= 0xffffffff, - .gpdcon= 0xaa84aaa0, - .gpdcon_mask= 0xffffffff, - .gpdup= 0x0000faff, - .gpdup_mask= 0xffffffff, + .lpcsel = 0x02, + .gpccon = 0xaa940659, + .gpccon_mask = 0xffffc0f0, + .gpcup = 0x0000ffff, + .gpcup_mask = 0xffffffff, + .gpdcon = 0xaa84aaa0, + .gpdcon_mask = 0xffffffff, + .gpdup = 0x0000faff, + .gpdup_mask = 0xffffffff, }; static int power_supply_init(struct device *dev) @@ -526,14 +527,14 @@ static struct platform_device h1940_backlight = { static void h1940_lcd_power_set(struct plat_lcd_data *pd, unsigned int power) { - int value; + int value, retries = 100; if (!power) { gpio_set_value(S3C2410_GPC(0), 0); /* wait for 3ac */ do { value = gpio_get_value(S3C2410_GPC(6)); - } while (value); + } while (value && retries--); gpio_set_value(H1940_LATCH_LCD_P2, 0); gpio_set_value(H1940_LATCH_LCD_P3, 0); @@ -551,6 +552,9 @@ static void h1940_lcd_power_set(struct plat_lcd_data *pd, gpio_set_value(H1940_LATCH_LCD_P0, 1); gpio_set_value(H1940_LATCH_LCD_P1, 1); + gpio_direction_input(S3C2410_GPC(1)); + gpio_direction_input(S3C2410_GPC(4)); + mdelay(10); s3c_gpio_cfgpin(S3C2410_GPC(1), S3C_GPIO_SFN(2)); s3c_gpio_cfgpin(S3C2410_GPC(4), S3C_GPIO_SFN(2)); |