diff options
Diffstat (limited to 'drivers/video/backlight/pwm_bl.c')
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 2c2a2c703c1..b8f38ec6eb1 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -28,6 +28,7 @@ struct pwm_bl_data { unsigned int lth_brightness; int (*notify)(struct device *, int brightness); + int (*check_fb)(struct device *, struct fb_info *); }; static int pwm_backlight_update_status(struct backlight_device *bl) @@ -62,9 +63,18 @@ static int pwm_backlight_get_brightness(struct backlight_device *bl) return bl->props.brightness; } +static int pwm_backlight_check_fb(struct backlight_device *bl, + struct fb_info *info) +{ + struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev); + + return !pb->check_fb || pb->check_fb(pb->dev, info); +} + static const struct backlight_ops pwm_backlight_ops = { .update_status = pwm_backlight_update_status, .get_brightness = pwm_backlight_get_brightness, + .check_fb = pwm_backlight_check_fb, }; static int pwm_backlight_probe(struct platform_device *pdev) @@ -95,6 +105,7 @@ static int pwm_backlight_probe(struct platform_device *pdev) pb->period = data->pwm_period_ns; pb->notify = data->notify; + pb->check_fb = data->check_fb; pb->lth_brightness = data->lth_brightness * (data->pwm_period_ns / data->max_brightness); pb->dev = &pdev->dev; |