The GPIO backlight driver controls the backlight in on/off mode through
a single GPIO.
Signed-off-by: NLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>