backlight-overlay.dts

/dts-v1/;
/plugin/;

/ {
	compatible = "brcm,bcm2835";

	fragment@0 {
		target-path = "/soc";
		__overlay__ {
			backlight: backlight {
				compatible = "gpio-backlight";
				gpios = <&gpio 22 0>; /* GPIO_ACTIVE_HIGH */
				default-on;
			};
		};
	};
};