hci_uart_iso_timesync/boards/nrf5340_audio_dk_nrf5340_cpuapp.overlay

/ {
    host_interface {
        compatible = "gpio-outputs";
        status = "okay";
        timesync: pin_0 {
		    gpios = <&arduino_header 10 GPIO_ACTIVE_HIGH>;
            label = "Controller to host timesync pin";
        };
    };
};