samples/drivers/adc/boards/nucleo_h7a3zi_q.overlay

/* Copyright (c) 2021 STMicroelectronics
   SPDX-License-Identifier: Apache-2.0 */

 / {
	zephyr,user {
		/* adjust channel number according to pinmux in board.dts */
		io-channels = <&adc1 15>;
	};
};