rpi-weather-overlay.dts

// rpi-sense HAT
/dts-v1/;
/plugin/;

/ {
	compatible = "brcm,bcm2708";

	fragment@0 {
		target = <&i2c1>;
		__overlay__ {
			#address-cells = <1>;
			#size-cells = <0>;
			status = "okay";

			pcf8523@68 {
				compatible = "nxp,pcf8523";
				reg = <0x68>;
				status = "okay";
			};
		};
	};

	fragment@1 {
		target-path = "/";
		__overlay__ {

			w1: onewire@0 {
				compatible = "w1-gpio";
				pinctrl-names = "default";
				pinctrl-0 = <&w1_pins>;
				gpios = <&gpio 4 0>;
				rpi,parasitic-power = <0>;
				status = "okay";
			};
		};
	};

	fragment@2 {
		target = <&gpio>;
		__overlay__ {
			w1_pins: w1_pins {
				brcm,pins = <4>;
				brcm,function = <0>; // in (initially)
				brcm,pull = <0>; // off
			};
		};
	};
};