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backlight: convert from legacy pm ops to dev_pm_ops 

Convert drivers/video/backlight/class to use dev_pm_ops for power
management and remove Legacy PM ops hooks.

With this change, backlight class registers suspend/resume callbacks via
class->pm (dev_pm_ops) instead of Legacy class->suspend/resume.  When
__device_suspend() runs call-backs, it will find class->pm ops for the
backlight class.

[jg1.han@samsung.com: add CONFIG_PM_SLEEP to suspend/resume functions]
Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Shuah Khan <shuahkhan@gmail.com>
Cc: Jingoo Han <jg1.han@samsung.com>
Cc: Shuah Khan <shuahkhan@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Shuah Khan 2013-07-03 15:05:16 -07:00 committed by Linus Torvalds
parent 6212de88f8
commit 3601792e7b
1 changed files with 7 additions and 3 deletions
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10
drivers/video/backlight/backlight.c
View File

@ -208,7 +208,8 @@ static ssize_t backlight_show_actual_brightness(struct device *dev,
static struct class *backlight_class;
static int backlight_suspend(struct device *dev, pm_message_t state)
#ifdef CONFIG_PM_SLEEP
static int backlight_suspend(struct device *dev)
{
struct backlight_device *bd = to_backlight_device(dev);
@ -235,6 +236,10 @@ static int backlight_resume(struct device *dev)
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(backlight_class_dev_pm_ops, backlight_suspend,
backlight_resume);
static void bl_device_release(struct device *dev)
{
@ -489,8 +494,7 @@ static int __init backlight_class_init(void)
}
backlight_class->dev_attrs = bl_device_attributes;
backlight_class->suspend = backlight_suspend;
backlight_class->resume = backlight_resume;
backlight_class->pm = &backlight_class_dev_pm_ops;
return 0;
}