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backlight: fix pwm_bl.c to notify platform code when suspending 

When suspending, pwm-bl sets duty cycle to 0, and shuts down the pwm
device.

This patch ensure that the platform code is called before that
(through the notify callback_, leaving a chance for the platform code
to configure GPIOs (shutting off the backlight, for example), much like
it is done during normal operations.

Signed-off-by: Marc Zyngier <maz@misterjones.org>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
hifive-unleashed-5.1
Marc Zyngier 2009-06-19 10:50:54 +02:00 committed by Eric Miao
parent 4aa78264d1
commit 82e8b54229
1 changed files with 2 additions and 0 deletions
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2
drivers/video/backlight/pwm_bl.c
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@ -145,6 +145,8 @@ static int pwm_backlight_suspend(struct platform_device *pdev,
struct backlight_device *bl = platform_get_drvdata(pdev);
struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev);
if (pb->notify)
pb->notify(0);
pwm_config(pb->pwm, 0, pb->period);
pwm_disable(pb->pwm);
return 0;