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backlight: s6e63m0: remove redundant variable 'before_power'

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'before_power' was used to check the previous status when resume() is
called.  However, FB_BLANK_POWERDOWN was used in suspend() all the time,
so there is no need to check the previous status.  Also, redundant return
variables are removed to reduce the code.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jingoo Han 2013-02-21 16:43:25 -08:00 committed by Linus Torvalds
parent 81c650e3ac
commit b6bef463f5
1 changed files with 3 additions and 21 deletions
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24
drivers/video/backlight/s6e63m0.c
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@ -827,44 +827,26 @@ static int s6e63m0_remove(struct spi_device *spi)
}
#if defined(CONFIG_PM)
static unsigned int before_power;
static int s6e63m0_suspend(struct spi_device *spi, pm_message_t mesg)
{
int ret = 0;
struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
before_power = lcd->power;
/*
* when lcd panel is suspend, lcd panel becomes off
* regardless of status.
*/
ret = s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
return ret;
return s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
}
static int s6e63m0_resume(struct spi_device *spi)
{
int ret = 0;
struct s6e63m0 *lcd = dev_get_drvdata(&spi->dev);
/*
* after suspended, if lcd panel status is FB_BLANK_UNBLANK
* (at that time, before_power is FB_BLANK_UNBLANK) then
* it changes that status to FB_BLANK_POWERDOWN to get lcd on.
*/
if (before_power == FB_BLANK_UNBLANK)
lcd->power = FB_BLANK_POWERDOWN;
lcd->power = FB_BLANK_POWERDOWN;
dev_dbg(&spi->dev, "before_power = %d\n", before_power);
ret = s6e63m0_power(lcd, before_power);
return ret;
return s6e63m0_power(lcd, FB_BLANK_UNBLANK);
}
#else
#define s6e63m0_suspend NULL