gistfile1.txt

dts
===
dsa@0 {
        compatible = "marvell,dsa";
        #address-cells = <2>;
        #size-cells = <0>;

        interrupts = <10>;
        dsa,ethernet = <&fec>;
        dsa,mii-bus-name = "fec_enet_mii_bus";

        switch@0 {
        #address-cells = <1>;
        #size-cells = <0>;
                reg = <16 0>; // MDIO address 16, switch 0 in tree

                port@0 {
                        reg = <0>;
                        label = "lan1";
                };

                port@1 {
                        reg = <1>;
                        label = "lan2";
                };

                port@2 {
                        reg = <2>;
                        label = "lan3";
                };

                port@3 {
                        reg = <3>;
                        label = "lan4";
                };

                port@4 {
                        reg = <4>;
                        label = "lan5";
                };

                port@5 {
                        reg = <5>;
                        label = "cpu";
                };

                port@6 {
                        reg = <6>;
                        label = "wan";
                };
        };
};




initramfs
=========
busybox ip link set eth0 up
busybox brctl addbr lan
for interface in lan1 lan2 lan3 lan4 lan5
do
  busybox ip link set dev $interface up
  busybox brctl addif lan $interface
done
busybox ip link set dev lan up