This patch adds machine specific support for LCD controller like setting power to LCD and adding LCD platform device.
Signed-off-by: Prathyush K <[email protected]> Signed-off-by: Leela Krishna Amudala <[email protected]> --- arch/arm/mach-exynos/mach-exynos5-dt.c | 57 ++++++++++++++++++++++++++++++++ 1 files changed, 57 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c index 0a200fd..652a537 100644 --- a/arch/arm/mach-exynos/mach-exynos5-dt.c +++ b/arch/arm/mach-exynos/mach-exynos5-dt.c @@ -13,6 +13,7 @@ #include <linux/serial_core.h> #include <linux/pwm_backlight.h> #include <linux/gpio.h> +#include <linux/delay.h> #include <asm/mach/arch.h> #include <asm/hardware/gic.h> @@ -25,6 +26,8 @@ #include "common.h" +#include <video/platform_lcd.h> + static int smdk5250_bl_notify(struct device *unused, int brightness) { @@ -48,6 +51,55 @@ static struct platform_pwm_backlight_data smdk5250_bl_data = { .notify = smdk5250_bl_notify, }; +static void lcd_set_power(struct plat_lcd_data *pd, + unsigned int power) +{ + + /* reset */ + gpio_request_one(EXYNOS5_GPX1(5), GPIOF_OUT_INIT_HIGH, "GPX1"); + + mdelay(20); + if (power) { + /* fire nRESET on power up */ + gpio_set_value(EXYNOS5_GPX1(5), 0); + mdelay(20); + gpio_set_value(EXYNOS5_GPX1(5), 1); + mdelay(20); + gpio_free(EXYNOS5_GPX1(5)); + } else { + /* fire nRESET on power off */ + gpio_set_value(EXYNOS5_GPX1(5), 0); + mdelay(20); + gpio_set_value(EXYNOS5_GPX1(5), 1); + mdelay(20); + gpio_free(EXYNOS5_GPX1(5)); + } + mdelay(20); + + /* + * Request lcd_bl_en GPIO for smdk5250_bl_notify(). + * TODO: Fix this so we are not at risk of requesting the GPIO + * multiple times, this should be done with device tree, and + * likely integrated into the plat-samsung/dev-backlight.c init. + */ + gpio_request_one(EXYNOS5_GPX3(0), GPIOF_OUT_INIT_LOW, "GPX3"); +} + +static int smdk5250_match_fb(struct plat_lcd_data *pd, struct fb_info *info) +{ + /* Don't call .set_power callback while unblanking */ + return 0; +} + +static struct plat_lcd_data smdk5250_lcd_data = { + .set_power = lcd_set_power, + .match_fb = smdk5250_match_fb, +}; + +static struct platform_device smdk5250_lcd = { + .name = "platform-lcd", + .dev.platform_data = &smdk5250_lcd_data, +}; /* * The following lookup table is used to override device names when devices * are registered from device tree. This is temporarily added to enable @@ -80,6 +132,10 @@ static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = { {}, }; +static struct platform_device *smdk5250_devices[] __initdata = { + &smdk5250_lcd, /* for platform_lcd device */ +}; + static void __init exynos5250_dt_map_io(void) { exynos_init_io(NULL, 0); @@ -91,6 +147,7 @@ static void __init exynos5250_dt_machine_init(void) samsung_bl_set(&smdk5250_bl_gpio_info, &smdk5250_bl_data); of_platform_populate(NULL, of_default_bus_match_table, exynos5250_auxdata_lookup, NULL); + platform_add_devices(smdk5250_devices, ARRAY_SIZE(smdk5250_devices)); } static char const *exynos5250_dt_compat[] __initdata = { -- 1.7.0.4 _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
