diff options
| -rw-r--r-- | Documentation/ABI/stable/sysfs-class-backlight | 7 | ||||
| -rw-r--r-- | include/linux/backlight.h | 20 |
2 files changed, 16 insertions, 11 deletions
diff --git a/Documentation/ABI/stable/sysfs-class-backlight b/Documentation/ABI/stable/sysfs-class-backlight index 023fb52645f8..6102d6bebdf9 100644 --- a/Documentation/ABI/stable/sysfs-class-backlight +++ b/Documentation/ABI/stable/sysfs-class-backlight @@ -3,10 +3,11 @@ Date: April 2005 KernelVersion: 2.6.12 Contact: Richard Purdie <rpurdie@rpsys.net> Description: - Control BACKLIGHT power, values are FB_BLANK_* from fb.h + Control BACKLIGHT power, values are compatible with + FB_BLANK_* from fb.h - - FB_BLANK_UNBLANK (0) : power on. - - FB_BLANK_POWERDOWN (4) : power off + - 0 (FB_BLANK_UNBLANK) : power on. + - 4 (FB_BLANK_POWERDOWN) : power off Users: HAL What: /sys/class/backlight/<backlight>/brightness diff --git a/include/linux/backlight.h b/include/linux/backlight.h index 19a1c0e22629..ea9c1bc8148e 100644 --- a/include/linux/backlight.h +++ b/include/linux/backlight.h @@ -209,15 +209,19 @@ struct backlight_properties { * attribute: /sys/class/backlight/<backlight>/bl_power * When the power property is updated update_status() is called. * - * The possible values are: (0: full on, 1 to 3: power saving - * modes; 4: full off), see FB_BLANK_XXX. + * The possible values are: (0: full on, 4: full off), see + * BACKLIGHT_POWER constants. * - * When the backlight device is enabled @power is set - * to FB_BLANK_UNBLANK. When the backlight device is disabled - * @power is set to FB_BLANK_POWERDOWN. + * When the backlight device is enabled, @power is set to + * BACKLIGHT_POWER_ON. When the backlight device is disabled, + * @power is set to BACKLIGHT_POWER_OFF. */ int power; +#define BACKLIGHT_POWER_ON (0) +#define BACKLIGHT_POWER_OFF (4) +#define BACKLIGHT_POWER_REDUCED (1) // deprecated; don't use in new code + /** * @type: The type of backlight supported. * @@ -346,7 +350,7 @@ static inline int backlight_enable(struct backlight_device *bd) if (!bd) return 0; - bd->props.power = FB_BLANK_UNBLANK; + bd->props.power = BACKLIGHT_POWER_ON; bd->props.state &= ~BL_CORE_FBBLANK; return backlight_update_status(bd); @@ -361,7 +365,7 @@ static inline int backlight_disable(struct backlight_device *bd) if (!bd) return 0; - bd->props.power = FB_BLANK_POWERDOWN; + bd->props.power = BACKLIGHT_POWER_OFF; bd->props.state |= BL_CORE_FBBLANK; return backlight_update_status(bd); @@ -380,7 +384,7 @@ static inline int backlight_disable(struct backlight_device *bd) */ static inline bool backlight_is_blank(const struct backlight_device *bd) { - return bd->props.power != FB_BLANK_UNBLANK || + return bd->props.power != BACKLIGHT_POWER_ON || bd->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK); } |