arm64: dts: allwinner: add backlight regulator for Pinebook

Backlight power is controlled by PH6 GPIO, so add corresponding
regulator-fixed node for it. Otherwise backlight won't light up
if bootloader doesn't enable it.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts
index 77fac84..ec537c5 100644 (file)
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-pinebook.dts
@@ -22,12 +22,22 @@
                ethernet0 = &rtl8723cs;
        };
 
+       vdd_bl: regulator@0 {
+               compatible = "regulator-fixed";
+               regulator-name = "bl-3v3";
+               regulator-min-microvolt = <3300000>;
+               regulator-max-microvolt = <3300000>;
+               gpio = <&pio 7 6 GPIO_ACTIVE_HIGH>; /* PH6 */
+               enable-active-high;
+       };
+
        backlight: backlight {
                compatible = "pwm-backlight";
                pwms = <&pwm 0 50000 0>;
                brightness-levels = <0 5 10 15 20 30 40 55 70 85 100>;
                default-brightness-level = <2>;
                enable-gpios = <&pio 3 23 GPIO_ACTIVE_HIGH>; /* PD23 */
+               power-supply = <&vdd_bl>;
        };
 
        chosen {