WyBox 7620a 启用第二个串口

uart@500 {
            compatible = "ralink,mt7620a-uart", "ralink,rt2880-uart", "ns16550a";
            reg = <0x500 0x100>;

            resets = <&rstctrl 12>;
            reset-names = "uart";

            interrupt-parent = <&intc>;
            interrupts = <5>;

            reg-shift = <2>;

            status = "ok";
            
            pinctrl-names = "default";
            pinctrl-0 = <&uart_pins>;
        };

uart_pins: uartf {
            uartf {
                ralink,group = "uartf";
                ralink,function = "uartf";
            };
        };

chosen {
        bootargs = "console=ttyS1,57600";
    };

pinctrl {
        state_default: pinctrl0 {
            gpio {
                ralink,group = "i2c";
                ralink,function = "gpio";
            };
        };
    };