/dts-v1/; /plugin/; / { compatible = "radxa,zero-3w", "rockchip,rk3566"; /* Enable UART3 on pins 3/5 (GPIO1_A0/A1) */ fragment@0 { target = <&uart3>; __overlay__ { status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&uart3m0_xfer>; }; }; };