From 87c37b51ade7d1296ab99ed8f237637bed7779c7 Mon Sep 17 00:00:00 2001
From: Alexander Shiyan <shc_work@mail.ru>
Date: Sat, 17 Nov 2012 17:57:18 +0400
Subject: ARM: clps711x: Moving power management of framebuffer driver to the
 board

This patch moves the power management for clps711x-framebuffer driver
to the board code. To control we use "platform-lcd" driver.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Olof Johansson <olof@lixom.net>
---
 arch/arm/mach-clps711x/edb7211.c               | 34 ++++++++++++++++++++++++++
 arch/arm/mach-clps711x/include/mach/hardware.h |  2 --
 arch/arm/mach-clps711x/p720t.c                 | 20 +++++++++++++++
 3 files changed, 54 insertions(+), 2 deletions(-)

(limited to 'arch/arm/mach-clps711x')

diff --git a/arch/arm/mach-clps711x/edb7211.c b/arch/arm/mach-clps711x/edb7211.c
index cc32a65d698..81cc6835d7a 100644
--- a/arch/arm/mach-clps711x/edb7211.c
+++ b/arch/arm/mach-clps711x/edb7211.c
@@ -8,6 +8,8 @@
  */
 
 #include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
 #include <linux/memblock.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
@@ -18,12 +20,17 @@
 #include <asm/mach/arch.h>
 #include <asm/mach-types.h>
 
+#include <video/platform_lcd.h>
+
 #include <mach/hardware.h>
 
 #include "common.h"
 
 #define VIDEORAM_SIZE		SZ_128K
 
+#define EDB7211_LCD_DC_DC_EN	CLPS711X_GPIO(3, 1)
+#define EDB7211_LCDEN		CLPS711X_GPIO(3, 2)
+
 #define EDB7211_CS8900_BASE	(CS2_PHYS_BASE + 0x300)
 #define EDB7211_CS8900_IRQ	(IRQ_EINT3)
 
@@ -32,6 +39,28 @@ static struct resource edb7211_cs8900_resource[] __initdata = {
 	DEFINE_RES_IRQ(EDB7211_CS8900_IRQ),
 };
 
+static void edb7211_lcd_power_set(struct plat_lcd_data *pd, unsigned int power)
+{
+	if (power) {
+		gpio_set_value(EDB7211_LCDEN, 1);
+		udelay(100);
+		gpio_set_value(EDB7211_LCD_DC_DC_EN, 1);
+	} else {
+		gpio_set_value(EDB7211_LCD_DC_DC_EN, 0);
+		udelay(100);
+		gpio_set_value(EDB7211_LCDEN, 0);
+	}
+}
+
+static struct plat_lcd_data edb7211_lcd_power_pdata = {
+	.set_power	= edb7211_lcd_power_set,
+};
+
+static struct gpio edb7211_gpios[] __initconst = {
+	{ EDB7211_LCD_DC_DC_EN,	GPIOF_OUT_INIT_LOW,	"LCD DC-DC" },
+	{ EDB7211_LCDEN,	GPIOF_OUT_INIT_LOW,	"LCD POWER" },
+};
+
 static struct map_desc edb7211_io_desc[] __initdata = {
 	{	/* Memory-mapped extra keyboard row */
 		.virtual	= IO_ADDRESS(EP7211_PHYS_EXTKBD),
@@ -83,6 +112,11 @@ fixup_edb7211(struct tag *tags, char **cmdline, struct meminfo *mi)
 
 static void __init edb7211_init(void)
 {
+	gpio_request_array(edb7211_gpios, ARRAY_SIZE(edb7211_gpios));
+
+	platform_device_register_data(&platform_bus, "platform-lcd", 0,
+				      &edb7211_lcd_power_pdata,
+				      sizeof(edb7211_lcd_power_pdata));
 	platform_device_register_simple("video-clps711x", 0, NULL, 0);
 	platform_device_register_simple("cs89x0", 0, edb7211_cs8900_resource,
 					ARRAY_SIZE(edb7211_cs8900_resource));
diff --git a/arch/arm/mach-clps711x/include/mach/hardware.h b/arch/arm/mach-clps711x/include/mach/hardware.h
index 5a278cb02b0..4e273f2a5cb 100644
--- a/arch/arm/mach-clps711x/include/mach/hardware.h
+++ b/arch/arm/mach-clps711x/include/mach/hardware.h
@@ -82,8 +82,6 @@
  * Relevant bits in port D, which controls power to the various parts of
  * the LCD on the EDB7211.
  */
-#define EDB_PD1_LCD_DC_DC_EN	(1<<1)
-#define EDB_PD2_LCDEN		(1<<2)
 #define EDB_PD3_LCDBL		(1<<3)
 
 #endif
diff --git a/arch/arm/mach-clps711x/p720t.c b/arch/arm/mach-clps711x/p720t.c
index a58a0585e3e..34c8ee9ebb5 100644
--- a/arch/arm/mach-clps711x/p720t.c
+++ b/arch/arm/mach-clps711x/p720t.c
@@ -37,10 +37,27 @@
 #include <asm/mach/map.h>
 #include <mach/syspld.h>
 
+#include <video/platform_lcd.h>
+
 #include "common.h"
 
 #define GPIO_USERLED	CLPS711X_GPIO(3, 0)
 
+static void p720t_lcd_power_set(struct plat_lcd_data *pd, unsigned int power)
+{
+	if (power) {
+		PLD_LCDEN = PLD_LCDEN_EN;
+		PLD_PWR |= PLD_S4_ON | PLD_S2_ON | PLD_S1_ON;
+	} else {
+		PLD_PWR &= ~(PLD_S4_ON | PLD_S2_ON | PLD_S1_ON);
+		PLD_LCDEN = 0;
+	}
+}
+
+static struct plat_lcd_data p720t_lcd_power_pdata = {
+	.set_power	= p720t_lcd_power_set,
+};
+
 /*
  * Map the P720T system PLD. It occupies two address spaces:
  * 0x10000000 and 0x10400000. We map both regions as one.
@@ -121,6 +138,9 @@ static struct gpio_led_platform_data p720t_gpio_led_pdata __initdata = {
 
 static void __init p720t_init(void)
 {
+	platform_device_register_data(&platform_bus, "platform-lcd", 0,
+				      &p720t_lcd_power_pdata,
+				      sizeof(p720t_lcd_power_pdata));
 	platform_device_register_simple("video-clps711x", 0, NULL, 0);
 }
 
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