On July 11, 2012 6:42 PM, Leela Krishna Amudala <l.krishna@xxxxxxxxxxx> wrote: > -----Original Message----- > From: Leela Krishna Amudala [mailto:l.krishna@xxxxxxxxxxx] > Sent: Wednesday, July 11, 2012 6:42 PM > To: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > Cc: grant.likely@xxxxxxxxxxxx; olofj@xxxxxxxxxx; thomas.ab@xxxxxxxxxxx; kgene.kim@xxxxxxxxxxx; > joshi@xxxxxxxxxxx; jg1.han@xxxxxxxxxxx > Subject: [PATCH 3/7] ARM: EXYNOS5: add machine specific support for LCD > > This patch adds machine specific support for LCD controller like setting power to LCD > and adding LCD platform device. > > Signed-off-by: Prathyush K <prathyush.k@xxxxxxxxxxx> > Signed-off-by: Leela Krishna Amudala <l.krishna@xxxxxxxxxxx> > --- > 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> > + Delete this useless line. > > 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 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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