The LCD backlight should have a supply. Use same regulator as LCD, to silence warning: exynos4412-p4note-n8010.dtb: backlight: 'power-supply' is a required property Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx> --- arch/arm/boot/dts/exynos4412-p4note.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/exynos4412-p4note.dtsi b/arch/arm/boot/dts/exynos4412-p4note.dtsi index e41cf3ed362d..201c38edd48f 100644 --- a/arch/arm/boot/dts/exynos4412-p4note.dtsi +++ b/arch/arm/boot/dts/exynos4412-p4note.dtsi @@ -245,6 +245,7 @@ backlight: backlight { pinctrl-0 = <&led_bl_reset>; pinctrl-names = "default"; enable-gpios = <&gpm0 1 GPIO_ACTIVE_HIGH>; + power-supply = <&panel_vdd>; pwms = <&pwm 1 78770 0>; brightness-levels = <0 48 128 255>; num-interpolated-steps = <8>; -- 2.34.1