diff options
| author | Dilan Lee <dilee@nvidia.com> | 2011-08-25 15:59:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-08-25 16:25:34 -0700 |
| commit | cc7993f6439b49909a8792660c4d0741fec9d584 (patch) | |
| tree | 036093bfb2d5606c05fda6e08a433867e138ee21 | |
| parent | 23751be0094012eb6b4756fa80ca54b3eb83069f (diff) | |
backlight: add a callback 'notify_after' for backlight control
We need a callback to do some things after pwm_enable, pwm_disable
and pwm_config.
Signed-off-by: Dilan Lee <dilee@nvidia.com>
Reviewed-by: Robert Morell <rmorell@nvidia.com>
Reviewed-by: Arun Murthy <arun.murthy@stericsson.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 9 | ||||
| -rw-r--r-- | include/linux/pwm_backlight.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index b8f38ec6eb1..8b5b2a4124c 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -28,6 +28,8 @@ struct pwm_bl_data { unsigned int lth_brightness; int (*notify)(struct device *, int brightness); + void (*notify_after)(struct device *, + int brightness); int (*check_fb)(struct device *, struct fb_info *); }; @@ -55,6 +57,10 @@ static int pwm_backlight_update_status(struct backlight_device *bl) pwm_config(pb->pwm, brightness, pb->period); pwm_enable(pb->pwm); } + + if (pb->notify_after) + pb->notify_after(pb->dev, brightness); + return 0; } @@ -105,6 +111,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->period = data->pwm_period_ns; pb->notify = data->notify; + pb->notify_after = data->notify_after; pb->check_fb = data->check_fb; pb->lth_brightness = data->lth_brightness * (data->pwm_period_ns / data->max_brightness); @@ -172,6 +179,8 @@ static int pwm_backlight_suspend(struct platform_device *pdev, pb->notify(pb->dev, 0); pwm_config(pb->pwm, 0, pb->period); pwm_disable(pb->pwm); + if (pb->notify_after) + pb->notify_after(pb->dev, 0); return 0; } diff --git a/include/linux/pwm_backlight.h b/include/linux/pwm_backlight.h index 5e3e25a3c9c..63d2df43e61 100644 --- a/include/linux/pwm_backlight.h +++ b/include/linux/pwm_backlight.h @@ -14,6 +14,7 @@ struct platform_pwm_backlight_data { unsigned int pwm_period_ns; int (*init)(struct device *dev); int (*notify)(struct device *dev, int brightness); + void (*notify_after)(struct device *dev, int brightness); void (*exit)(struct device *dev); int (*check_fb)(struct device *dev, struct fb_info *info); }; |