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backlight: add a callback 'notify_after' for backlight control

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We need a callback to do some things after pwm_enable, pwm_disable
and pwm_config.

Signed-off-by: Dilan Lee <[email protected]>
Reviewed-by: Robert Morell <[email protected]>
Reviewed-by: Arun Murthy <[email protected]>
Cc: Richard Purdie <[email protected]>
Cc: Paul Mundt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Dilan Lee 2011-08-25 15:59:17 -07:00 • committed by Linus Torvalds
commit cc7993f643
2 changed files with 10 additions and 0 deletions
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9
drivers/video/backlight/pwm_bl.c
View file

@ -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;
}