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lcd: add corgibl_limit_intensity() to corgi_lcd 

This is not generic enough, added here for backward compatibility.
And make this an individual commit so future revert will be a bit
easier.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Eric Miao 2008-08-29 05:57:20 +08:00 committed by Russell King
parent b18250a8f6
commit bfdcaa3b68
2 changed files with 28 additions and 0 deletions
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27
drivers/video/backlight/corgi_lcd.c
View File

@ -86,6 +86,7 @@ struct corgi_lcd {
struct lcd_device *lcd_dev;
struct backlight_device *bl_dev;
int limit_mask;
int intensity;
int power;
int mode;
@ -97,6 +98,11 @@ struct corgi_lcd {
static int corgi_ssp_lcdtg_send(struct corgi_lcd *lcd, int reg, uint8_t val);
static struct corgi_lcd *the_corgi_lcd;
static unsigned long corgibl_flags;
#define CORGIBL_SUSPENDED 0x01
#define CORGIBL_BATTLOW 0x02
/*
* This is only a psuedo I2C interface. We can't use the standard kernel
* routines as the interface is write only. We just assume the data is acked...
@ -413,9 +419,25 @@ static int corgi_bl_update_status(struct backlight_device *bd)
if (bd->props.fb_blank != FB_BLANK_UNBLANK)
intensity = 0;
if (corgibl_flags & CORGIBL_SUSPENDED)
intensity = 0;
if (corgibl_flags & CORGIBL_BATTLOW)
intensity &= lcd->limit_mask;
return corgi_bl_set_intensity(lcd, intensity);
}
void corgibl_limit_intensity(int limit)
{
if (limit)
corgibl_flags |= CORGIBL_BATTLOW;
else
corgibl_flags &= ~CORGIBL_BATTLOW;
backlight_update_status(the_corgi_lcd->bl_dev);
}
EXPORT_SYMBOL(corgibl_limit_intensity);
static struct backlight_ops corgi_bl_ops = {
.get_brightness = corgi_bl_get_intensity,
.update_status = corgi_bl_update_status,
@ -426,6 +448,7 @@ static int corgi_lcd_suspend(struct spi_device *spi, pm_message_t state)
{
struct corgi_lcd *lcd = dev_get_drvdata(&spi->dev);
corgibl_flags |= CORGIBL_SUSPENDED;
corgi_bl_set_intensity(lcd, 0);
corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
return 0;
@ -435,6 +458,7 @@ static int corgi_lcd_resume(struct spi_device *spi)
{
struct corgi_lcd *lcd = dev_get_drvdata(&spi->dev);
corgibl_flags &= ~CORGIBL_SUSPENDED;
corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
backlight_update_status(lcd->bl_dev);
return 0;
@ -488,6 +512,9 @@ static int __devinit corgi_lcd_probe(struct spi_device *spi)
dev_set_drvdata(&spi->dev, lcd);
corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
backlight_update_status(lcd->bl_dev);
lcd->limit_mask = pdata->limit_mask;
the_corgi_lcd = lcd;
return 0;
err_unregister_lcd:

1
include/linux/spi/corgi_lcd.h
View File

@ -8,6 +8,7 @@ struct corgi_lcd_platform_data {
int init_mode;
int max_intensity;
int default_intensity;
int limit_mask;
void (*notify)(int intensity);
void (*kick_battery)(void);