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authorShuah Khan <shuah.kh@samsung.com>2013-07-04 00:05:16 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-04 01:07:43 +0200
commit3601792e7b68150420ea8dc129e26e167c0484d8 (patch)
tree3fc4913fe3730637a559a6c3a6867e2b55a2d678 /drivers/video
parentMAINTAINERS: add Backlight subsystem co-maintainer (diff)
downloadlinux-3601792e7b68150420ea8dc129e26e167c0484d8.tar.xz
linux-3601792e7b68150420ea8dc129e26e167c0484d8.zip
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>
Diffstat (limited to 'drivers/video')
-rw-r--r--drivers/video/backlight/backlight.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 53c52fbc9395..3fccb6d3c8c3 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -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;
}