summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAjay Kumar <ajaykumar.rs@samsung.com>2015-03-04 19:05:26 +0530
committerMinkyu Kang <mk7.kang@samsung.com>2015-04-06 14:34:40 +0900
commit9018efa7e227bc7041a98f5c5efebaa7ecfcfd0d (patch)
tree4a2ccc46c2557fb83f9d19d44ba2b10f10f8542d
parent6102560891d09db79196654aa414afc5acfa7911 (diff)
downloadu-boot-imx-9018efa7e227bc7041a98f5c5efebaa7ecfcfd0d.zip
u-boot-imx-9018efa7e227bc7041a98f5c5efebaa7ecfcfd0d.tar.gz
u-boot-imx-9018efa7e227bc7041a98f5c5efebaa7ecfcfd0d.tar.bz2
video: exynos_fb: configure backlight GPIOs if specified in DT
Add support to configure PWM_OUT(PWM output) GPIO and BL_EN(backlight enable) GPIO, if provided in FIMD DT node. Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
-rw-r--r--doc/device-tree-bindings/video/exynos-fb.txt2
-rw-r--r--drivers/video/exynos_fb.c21
2 files changed, 23 insertions, 0 deletions
diff --git a/doc/device-tree-bindings/video/exynos-fb.txt b/doc/device-tree-bindings/video/exynos-fb.txt
index dc4e44f..b022f61 100644
--- a/doc/device-tree-bindings/video/exynos-fb.txt
+++ b/doc/device-tree-bindings/video/exynos-fb.txt
@@ -61,6 +61,8 @@ Board(panel specific):
disabled with compatible string
"samsung,sysmmu-v3.3", with a "reg" property
holding the register address of FIMD sysmmu.
+ samsung,pwm-out-gpio: PWM output GPIO.
+ samsung,bl-en-gpio: backlight enable GPIO.
Example:
SOC specific part:
diff --git a/drivers/video/exynos_fb.c b/drivers/video/exynos_fb.c
index c5d7330..8f3b826 100644
--- a/drivers/video/exynos_fb.c
+++ b/drivers/video/exynos_fb.c
@@ -19,6 +19,7 @@
#include <asm/arch/mipi_dsim.h>
#include <asm/arch/dp_info.h>
#include <asm/arch/system.h>
+#include <asm/gpio.h>
#include <asm-generic/errno.h>
#include "exynos_fb.h"
@@ -102,6 +103,10 @@ __weak int exynos_lcd_misc_init(vidinfo_t *vid)
static void lcd_panel_on(vidinfo_t *vid)
{
+ struct gpio_desc pwm_out_gpio;
+ struct gpio_desc bl_en_gpio;
+ unsigned int node;
+
udelay(vid->init_delay);
exynos_backlight_reset();
@@ -121,6 +126,22 @@ static void lcd_panel_on(vidinfo_t *vid)
exynos_backlight_on(1);
+#ifdef CONFIG_OF_CONTROL
+ node = fdtdec_next_compatible(gd->fdt_blob, 0,
+ COMPAT_SAMSUNG_EXYNOS_FIMD);
+ if (node <= 0) {
+ debug("FIMD: Can't get device node for FIMD\n");
+ return;
+ }
+ gpio_request_by_name_nodev(gd->fdt_blob, node, "samsung,pwm-out-gpio",
+ 0, &pwm_out_gpio,
+ GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
+
+ gpio_request_by_name_nodev(gd->fdt_blob, node, "samsung,bl-en-gpio", 0,
+ &bl_en_gpio,
+ GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
+
+#endif
exynos_cfg_ldo();
exynos_enable_ldo(1);