samples/drivers/dac/boards/arduino_zero.overlay - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 / {
 	zephyr,user {
 		dac = <&dac0>;
 		dac-channel-id = <0>;
 		dac-resolution = <10>;
 	};
 };
	/ {
	zephyr,user {
	dac = <&dac0>;
	dac-channel-id = <0>;
	dac-resolution = <10>;
	};
	};