Adds GPIO parsing functionality for "LCD backlight" and "LCD enable" GPIO pins of exynos dp controller.
Signed-off-by: Vikas Sajjan vikas.sajjan@linaro.org --- drivers/video/exynos/exynos_dp_core.c | 45 +++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+)
diff --git a/drivers/video/exynos/exynos_dp_core.c b/drivers/video/exynos/exynos_dp_core.c index de9d4da..242a708 100644 --- a/drivers/video/exynos/exynos_dp_core.c +++ b/drivers/video/exynos/exynos_dp_core.c @@ -19,6 +19,7 @@ #include <linux/interrupt.h> #include <linux/delay.h> #include <linux/of.h> +#include <linux/of_gpio.h>
#include <video/exynos_dp.h>
@@ -895,11 +896,51 @@ static void exynos_dp_hotplug(struct work_struct *work) }
#ifdef CONFIG_OF + +static int exynos_parse_gpio(struct device *dev) +{ + int gpio = -1; + struct device_node *np = dev->of_node; + enum of_gpio_flags flags; + u32 value; + int ret = -1; + + if (!of_find_property(np, "lcd_bl_gpio", &value)) { + dev_err(dev, "no bl gpio property found\n"); + return -1; + } + + gpio = of_get_named_gpio_flags(np, "lcd_bl_gpio", 0, &flags); + if (gpio_is_valid(gpio)) { + ret = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "exynos4-fb"); + if (ret < 0) { + return ret; + } + } + gpio_set_value(gpio, 1); + + if (!of_find_property(np, "lcd_en_gpio", &value)) { + dev_err(dev, "no bl gpio property found\n"); + return -1; + } + gpio = of_get_named_gpio_flags(np, "lcd_en_gpio", 0, &flags); + if (gpio_is_valid(gpio)) { + ret = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH, "exynos4-fb"); + if (ret < 0) { + return ret; + } + } + gpio_set_value(gpio, 1); + + return 0; +} + static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev) { struct device_node *dp_node = dev->of_node; struct exynos_dp_platdata *pd; struct video_info *dp_video_config; + int ret = -1;
pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); if (!pd) { @@ -960,6 +1001,10 @@ static struct exynos_dp_platdata *exynos_dp_dt_parse_pdata(struct device *dev) return ERR_PTR(-EINVAL); }
+ ret = exynos_parse_gpio(dev); + if (ret != 0) + return NULL; + return pd; }