diff options
| -rw-r--r-- | drivers/video/backlight/corgi_lcd.c | 27 | ||||
| -rw-r--r-- | include/linux/spi/corgi_lcd.h | 1 |
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c index bf69e50d262..068f1486409 100644 --- a/drivers/video/backlight/corgi_lcd.c +++ b/drivers/video/backlight/corgi_lcd.c @@ -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: diff --git a/include/linux/spi/corgi_lcd.h b/include/linux/spi/corgi_lcd.h index 3c53ac26c8d..b6161aae275 100644 --- a/include/linux/spi/corgi_lcd.h +++ b/include/linux/spi/corgi_lcd.h @@ -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); |