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| author | Eric Miao <eric.miao@marvell.com> | 2008-08-29 05:57:20 +0800 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-09-23 22:04:31 +0100 |
| commit | bfdcaa3b6899bbfc6ba633aff3f5f2422486c8c1 (patch) | |
| tree | 88509c321bf825b9ca4d522dc3ccc2e56e317fbe /drivers/video/backlight | |
| parent | b18250a8f66050bd2a52287cd543fb93100e8ee0 (diff) | |
| download | linux-bfdcaa3b6899bbfc6ba633aff3f5f2422486c8c1.tar.gz linux-bfdcaa3b6899bbfc6ba633aff3f5f2422486c8c1.tar.bz2 linux-bfdcaa3b6899bbfc6ba633aff3f5f2422486c8c1.zip | |
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>
Diffstat (limited to 'drivers/video/backlight')
| -rw-r--r-- | drivers/video/backlight/corgi_lcd.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c index bf69e50d262e..068f14864099 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: |