1/ {
2	chosen {
3		uart,passthrough = &uart4;
4	};
5};
6
7&uart4 {
8	pinctrl-0 = <&uart4_tx_pa0 &uart4_rx_pa1>;
9	pinctrl-names = "default";
10	current-speed = <9600>;
11	status = "okay";
12};
13