Adds machine specific support for LCD backlight for SMDK board based
on Exynos5
Signed-off-by: Leela Krishna Amudala <l.krishna@xxxxxxxxxxx>
---
arch/arm/mach-exynos/Kconfig | 1 +
arch/arm/mach-exynos/mach-exynos5-dt.c | 28 ++++++++++++++++++++++++++++
2 files changed, 29 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index 498596b..a2a2940 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -412,6 +412,7 @@ config MACH_EXYNOS5_DT
select SOC_EXYNOS5250
select USE_OF
select ARM_AMBA
+ select SAMSUNG_DEV_BACKLIGHT
help
Machine support for Samsung Exynos4 machine with device tree enabled.
Select this if a fdt blob is available for the EXYNOS4 SoC based board.
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
index 7b1e11a..0a200fd 100644
--- a/arch/arm/mach-exynos/mach-exynos5-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
@@ -11,6 +11,8 @@
#include <linux/of_platform.h>
#include <linux/serial_core.h>
+#include <linux/pwm_backlight.h>
+#include <linux/gpio.h>
#include <asm/mach/arch.h>
#include <asm/hardware/gic.h>
@@ -18,9 +20,34 @@
#include <plat/cpu.h>
#include <plat/regs-serial.h>
+#include <plat/backlight.h>
+#include <plat/gpio-cfg.h>
#include "common.h"
+
+static int smdk5250_bl_notify(struct device *unused, int brightness)
+{
+ /* manage lcd_bl_en signal */
+ if (brightness)
+ gpio_set_value(EXYNOS5_GPX3(0), 1);
+ else
+ gpio_set_value(EXYNOS5_GPX3(0), 0);
+
+ return brightness;
+}
+
+/* LCD Backlight data */
+static struct samsung_bl_gpio_info smdk5250_bl_gpio_info = {
+ .no = EXYNOS5_GPB2(0),
+ .func = S3C_GPIO_SFN(2),
+};
+
+static struct platform_pwm_backlight_data smdk5250_bl_data = {
+ .pwm_period_ns = 1000000,
+ .notify = smdk5250_bl_notify,
+};
+
/*
* The following lookup table is used to override device names when devices
* are registered from device tree. This is temporarily added to enable
@@ -61,6 +88,7 @@ static void __init exynos5250_dt_map_io(void)
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);
}
--
1.7.0.4
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