From 6c36fd25ff882aaf0c7b9c242bb94778c0d1fd54 Mon Sep 17 00:00:00 2001
From: Tushar Behera <tushar.behera@linaro.org>
Date: Wed, 11 Apr 2012 16:54:44 +0530
Subject: ARM: EXYNOS: Add display support to EXYNOS4-DT

Suggested-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
---
 arch/arm/mach-exynos/Kconfig           |  2 ++
 arch/arm/mach-exynos/mach-exynos4-dt.c | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/arch/arm/mach-exynos/Kconfig b/arch/arm/mach-exynos/Kconfig
index a10fcbf1fbd..02d7b2917e5 100644
--- a/arch/arm/mach-exynos/Kconfig
+++ b/arch/arm/mach-exynos/Kconfig
@@ -390,6 +390,8 @@ config MACH_EXYNOS4_DT
 	select USE_OF
 	select ARM_AMBA
 	select HAVE_SAMSUNG_KEYPAD if INPUT_KEYBOARD
+	select SAMSUNG_DEV_BACKLIGHT
+	select SAMSUNG_DEV_PWM
 	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-exynos4-dt.c b/arch/arm/mach-exynos/mach-exynos4-dt.c
index 8245f1c761d..b7252ad07ae 100644
--- a/arch/arm/mach-exynos/mach-exynos4-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos4-dt.c
@@ -14,6 +14,16 @@
 #include <linux/of_platform.h>
 #include <linux/serial_core.h>
 
+#include <linux/pwm_backlight.h>
+#include <plat/backlight.h>
+#include <plat/gpio-cfg.h>
+#include <linux/gpio.h>
+#include <plat/regs-fb-v4.h>
+#include <linux/fb.h>
+#include <plat/fb.h>
+#include <linux/lcd.h>
+#include <plat/devs.h>
+
 #include <asm/mach/arch.h>
 #include <asm/hardware/gic.h>
 #include <mach/map.h>
@@ -23,6 +33,17 @@
 
 #include "common.h"
 
+/* LCD Backlight data */
+static struct samsung_bl_gpio_info origen_bl_gpio_info = {
+	.no	= EXYNOS4_GPD0(0),
+	.func	= S3C_GPIO_SFN(2),
+};
+
+static struct platform_pwm_backlight_data origen_bl_data = {
+	.pwm_id		= 0,
+	.pwm_period_ns	= 1000,
+};
+
 /*
  * The following lookup table is used to override device names when devices
  * are registered from device tree. This is temporarily added to enable
@@ -57,6 +78,8 @@ static const struct of_dev_auxdata exynos4210_auxdata_lookup[] __initconst = {
 				"s3c2440-i2c.0", NULL),
 	OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA0, "dma-pl330.0", NULL),
 	OF_DEV_AUXDATA("arm,pl330", EXYNOS4_PA_PDMA1, "dma-pl330.1", NULL),
+	OF_DEV_AUXDATA("samsung,exynos4210-fimd", EXYNOS4_PA_FIMD0,
+			"exynos4-fb.0", NULL),
 	{},
 };
 
@@ -66,10 +89,21 @@ static void __init exynos4210_dt_map_io(void)
 	s3c24xx_init_clocks(24000000);
 }
 
+static void __init exynos4_setup_fimd(void)
+{
+	unsigned int reg;
+
+	reg = __raw_readl(S3C_VA_SYS + 0x0210);
+	reg |= (1 << 1);
+	__raw_writel(reg, S3C_VA_SYS + 0x0210);
+}
+
 static void __init exynos4210_dt_machine_init(void)
 {
 	of_platform_populate(NULL, of_default_bus_match_table,
 				exynos4210_auxdata_lookup, NULL);
+	samsung_bl_set(&origen_bl_gpio_info, &origen_bl_data);
+	exynos4_setup_fimd();
 }
 
 static char const *exynos4210_dt_compat[] __initdata = {
-- 
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