ARM: clps711x: Moving backlight controls of framebuffer driver to the board

This patch moves the backlight controls for clps711x-framebuffer driver
to the board code. To control we use "generic-bl" driver.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
[olof: fixed space/tab whitespace in drivers/video/clps711xfb.c]
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/mach-clps711x/edb7211.c

@@ -13,6 +13,7 @@
 #include <linux/memblock.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
+#include <linux/backlight.h>
 #include <linux/platform_device.h>
 
 #include <asm/setup.h>
@@ -30,6 +31,7 @@
 
 #define EDB7211_LCD_DC_DC_EN	CLPS711X_GPIO(3, 1)
 #define EDB7211_LCDEN		CLPS711X_GPIO(3, 2)
+#define EDB7211_LCDBL		CLPS711X_GPIO(3, 3)
 
 #define EDB7211_CS8900_BASE	(CS2_PHYS_BASE + 0x300)
 #define EDB7211_CS8900_IRQ	(IRQ_EINT3)
@@ -56,9 +58,22 @@ static struct plat_lcd_data edb7211_lcd_power_pdata = {
 	.set_power	= edb7211_lcd_power_set,
 };
 
+static void edb7211_lcd_backlight_set_intensity(int intensity)
+{
+	gpio_set_value(EDB7211_LCDBL, intensity);
+}
+
+static struct generic_bl_info edb7211_lcd_backlight_pdata = {
+	.name			= "lcd-backlight.0",
+	.default_intensity	= 0x01,
+	.max_intensity		= 0x01,
+	.set_bl_intensity	= edb7211_lcd_backlight_set_intensity,
+};
+
 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" },
+	{ EDB7211_LCDBL,	GPIOF_OUT_INIT_LOW,	"LCD BACKLIGHT" },
 };
 
 static struct map_desc edb7211_io_desc[] __initdata = {
@@ -117,6 +132,9 @@ static void __init edb7211_init(void)
 	platform_device_register_data(&platform_bus, "platform-lcd", 0,
 				      &edb7211_lcd_power_pdata,
 				      sizeof(edb7211_lcd_power_pdata));
+	platform_device_register_data(&platform_bus, "generic-bl", 0,
+				      &edb7211_lcd_backlight_pdata,
+				      sizeof(edb7211_lcd_backlight_pdata));
 	platform_device_register_simple("video-clps711x", 0, NULL, 0);
 	platform_device_register_simple("cs89x0", 0, edb7211_cs8900_resource,
 					ARRAY_SIZE(edb7211_cs8900_resource));

arch/arm/mach-clps711x/include/mach/hardware.h

@@ -81,10 +81,4 @@
 
 #endif /* CONFIG_ARCH_EDB7211 */
 
-/*
- * Relevant bits in port D, which controls power to the various parts of
- * the LCD on the EDB7211.
- */
-#define EDB_PD3_LCDBL		(1<<3)
-
 #endif

arch/arm/mach-clps711x/p720t.c

@@ -25,6 +25,8 @@
 #include <linux/io.h>
 #include <linux/slab.h>
 #include <linux/leds.h>
+#include <linux/sizes.h>
+#include <linux/backlight.h>
 #include <linux/platform_device.h>
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/nand-gpio.h>
@@ -33,7 +35,6 @@
 #include <asm/pgtable.h>
 #include <asm/page.h>
 #include <asm/setup.h>
-#include <asm/sizes.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
@@ -103,6 +104,21 @@ static struct plat_lcd_data p720t_lcd_power_pdata = {
 	.set_power	= p720t_lcd_power_set,
 };
 
+static void p720t_lcd_backlight_set_intensity(int intensity)
+{
+	if (intensity)
+		PLD_PWR |= PLD_S3_ON;
+	else
+		PLD_PWR = 0;
+}
+
+static struct generic_bl_info p720t_lcd_backlight_pdata = {
+	.name			= "lcd-backlight.0",
+	.default_intensity	= 0x01,
+	.max_intensity		= 0x01,
+	.set_bl_intensity	= p720t_lcd_backlight_set_intensity,
+};
+
 /*
  * Map the P720T system PLD. It occupies two address spaces:
  * 0x10000000 and 0x10400000. We map both regions as one.
@@ -187,6 +203,9 @@ 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_data(&platform_bus, "generic-bl", 0,
+				      &p720t_lcd_backlight_pdata,
+				      sizeof(p720t_lcd_backlight_pdata));
 	platform_device_register_simple("video-clps711x", 0, NULL, 0);
 }
 

drivers/video/clps711xfb.c

@@ -22,19 +22,15 @@
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/fb.h>
 #include <linux/init.h>
-#include <linux/proc_fs.h>
 #include <linux/delay.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
 #include <linux/uaccess.h>
 
-#include <mach/syspld.h>
-
 struct fb_info	*cfb;
 
 #define CMAP_MAX_SIZE	16
@@ -162,25 +158,12 @@ clps7111fb_set_par(struct fb_info *info)
 
 static int clps7111fb_blank(int blank, struct fb_info *info)
 {
-    	if (blank) {
+	/* Enable/Disable LCD controller. */
-		if (machine_is_edb7211()) {
+	if (blank)
-			/* Turn off the LCD backlight. */
+		clps_writel(clps_readl(SYSCON1) & ~SYSCON1_LCDEN, SYSCON1);
-			clps_writeb(clps_readb(PDDR) & ~EDB_PD3_LCDBL, PDDR);
+	else
+		clps_writel(clps_readl(SYSCON1) | SYSCON1_LCDEN, SYSCON1);
 
-			/* Disable LCD controller. */
-			clps_writel(clps_readl(SYSCON1) & ~SYSCON1_LCDEN, 
-					SYSCON1);
-		}
-	} else {
-		if (machine_is_edb7211()) {
-			/* Enable LCD controller. */
-			clps_writel(clps_readl(SYSCON1) | SYSCON1_LCDEN,
-					SYSCON1);
-
-			/* Turn on the LCD backlight. */
-			clps_writeb(clps_readb(PDDR) | EDB_PD3_LCDBL, PDDR);
-		}
-	}
 	return 0;
 }
 
@@ -195,62 +178,6 @@ static struct fb_ops clps7111fb_ops = {
 	.fb_imageblit	= cfb_imageblit,
 };
 
-static int backlight_proc_show(struct seq_file *m, void *v)
-{
-	if (machine_is_edb7211()) {
-		seq_printf(m, "%d\n",
-				(clps_readb(PDDR) & EDB_PD3_LCDBL) ? 1 : 0);
-	}
-
-	return 0;
-}
-
-static int backlight_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, backlight_proc_show, NULL);
-}
-
-static ssize_t backlight_proc_write(struct file *file, const char *buffer,
-				    size_t count, loff_t *pos)
-{
-	unsigned char char_value;
-	int value;
-
-	if (count < 1) {
-		return -EINVAL;
-	}
-
-	if (copy_from_user(&char_value, buffer, 1)) 
-		return -EFAULT;
-
-	value = char_value - '0';
-
-	if (machine_is_edb7211()) {
-		unsigned char port_d;
-
-		port_d = clps_readb(PDDR);
-
-		if (value) {
-			port_d |= EDB_PD3_LCDBL;
-		} else {
-			port_d &= ~EDB_PD3_LCDBL;
-		}
-
-		clps_writeb(port_d, PDDR);
-	}
-
-	return count;
-}
-
-static const struct file_operations backlight_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= backlight_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-	.write		= backlight_proc_write,
-};
-
 static void __devinit clps711x_guess_lcd_params(struct fb_info *info)
 {
 	unsigned int lcdcon, syscon, size;
@@ -359,22 +286,6 @@ static int __devinit clps711x_fb_probe(struct platform_device *pdev)
 
 	fb_alloc_cmap(&cfb->cmap, CMAP_MAX_SIZE, 0);
 
-	if (!proc_create("backlight", 0444, NULL, &backlight_proc_fops)) {
-		printk("Couldn't create the /proc entry for the backlight.\n");
-		return -EINVAL;
-	}
-
-	/*
-	 * Power up the LCD
-	 */
-	if (machine_is_p720t())
-		PLD_PWR |= PLD_S3_ON;
-
-	if (machine_is_edb7211()) {
-		/* Turn on the LCD backlight. */
-		clps_writeb(clps_readb(PDDR) | EDB_PD3_LCDBL, PDDR);
-	}
-
 	err = register_framebuffer(cfb);
 
 out:	return err;
@@ -385,12 +296,6 @@ static int __devexit clps711x_fb_remove(struct platform_device *pdev)
 	unregister_framebuffer(cfb);
 	kfree(cfb);
 
-	/*
-	 * Power down the LCD
-	 */
-	if (machine_is_p720t())
-		PLD_PWR &= ~PLD_S3_ON;
-
 	return 0;
 }