tree 98786edc92c4da9c871070bb6d1fcf7923c6da5a
parent 9ffa4d12a850c6fb8b9b8f7d5fc31ac28633fcdb
author Kever Yang <kever.yang@rock-chips.com> 1518144312 +0800
committer Anatolij Gustschin <agust@denx.de> 1520327835 +0100

pwm-backlight: make power-supply as option

Some pwm backlight may not need 'power-supply', let's make it as option
in pwm-backlight driver.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>