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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>
This commit is contained in:
Alexander Shiyan 2012-11-17 17:57:20 +04:00 committed by Olof Johansson
parent e377ca1e32
commit 94760bf252
4 changed files with 43 additions and 107 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
arch/arm/mach-clps711x/edb7211.c
View File

@ -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));

6
arch/arm/mach-clps711x/include/mach/hardware.h
View File

@ -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

21
arch/arm/mach-clps711x/p720t.c
View File

@ -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);
}

105
drivers/video/clps711xfb.c
View File

@ -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) {
if (machine_is_edb7211()) {
/* Turn off the LCD backlight. */
clps_writeb(clps_readb(PDDR) & ~EDB_PD3_LCDBL, PDDR);
/* Enable/Disable LCD controller. */
if (blank)
clps_writel(clps_readl(SYSCON1) & ~SYSCON1_LCDEN, SYSCON1);
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;
}