DTS file attemtping to init LAN7431 with ksz9477

raspberry-router.dts

/*
 * Device tree file for Raspberry Router, adds support for the KSZ9897 switch
 * using DSA
 *
 * Copyright (C) 2021 Blinkinlabs
 * Author: Matt Mets <[email protected]>
 */

/dts-v1/;
/plugin/;

/ {
        compatible = "brcm,bcm2835";

        fragment@0 {
                target = <&pcie0>;
                __overlay__ {
                        #address-cells = <3>;
                        #size-cells = <2>;
                        ranges1;

                        host@0 {
                                reg = <0 0 0 0 0>;

                                #address-cells = <0x3>;
                                #size-cells = <0x2>;

                                eth1: ethernet@0 {
                                        compatible = "microchip,lan743x";
                                        status = "okay";
                                        reg = <0 0 0 0 0>;
                                        phy-connection-type = "rgmii";

                                        fixed-link {
                                                speed = <1000>;
                                                full-duplex;
                                        };
                                };
                        };
                };
        };

        fragment@1 {
                target = <&i2c_arm>;
                __overlay__ {
                        #address-cells = <1>;
                        #size-cells = <0>;

                        status = "okay";

                        ksz9897: ksz9477@5f {
                                compatible = "microchip,ksz9897";
                                status = "okay";
                                reg = <0x5f>;

                                microchip,synclko-125;

                                ports {
                                        #address-cells = <0x1>;
                                        #size-cells = <0x0>;
                                        port@0 {
                                                reg = <0x0>;
                                                label = "lan1";
                                        };
                                        port@1 {
                                                reg = <0x1>;
                                                label = "lan2";
                                        };
                                        port@2 {
                                                reg = <0x2>;
                                                label = "lan3";
                                        };
                                        port@4 {
                                                reg = <0x4>;
                                                label = "lan5";
                                        };
                                        port@6 {
                                                reg = <0x6>;
                                                label = "cpu";
                                                ethernet = <&eth1>;
                                                fixed-link {
                                                        speed = <1000>;
                                                        full-duplex;
                                                };
                                        };
                                };
                        };
                };
        };
};