在dts里添加接在pcie上的rtl8111网卡的子节点，并使其与连接在mdio总线上的mv88e6390网卡连接

好的，您的问题是如何在dts中添加接在pcie上的rtl8111网卡的子节点，并使其与连接在mdio总线上的mv88e6390网卡连接。

首先，在dts中添加pcie节点：

pcie@<base_address> {
    compatible = "pci-host-ecam-generic";
    device_type = "pci";
    #address-cells = <3>;
    #size-cells = <2>;
    ranges;
    reg = <0x00000000 0x00000000 0x00000000 <base_address> 0x00000000 0x00010000>;
    // 添加RTL8111网卡子节点
    rtl8111@0,0 {
        compatible = "rtl8111";
        reg = <0x00000000 0x00000000 0x00000000 0x00000000 0x00000000 0x00000 0x00000000>;
    };
};

然后，添加mdio节点：

mdio {
    #address-cells = <1>;
    #size-cells = <0>;
    compatible = "mdio-bus";
    // 添加MV88E6390网卡子节点
    mv88e6390@0 {
        compatible = "marvell,mv88e6390";
        reg = <0x0>;
        mdio-mux {
            #address-cells = <1>;
            #size-cells = <0>;
            // 建立RTL8111和MV88E6390之间的连接
            rtl8111_mdio_mux: mdio-mux@0 {
                compatible = "mdio-mux";
                #address-cells = <1>;
                #size-cells = <0>;
                mux-reg = <0x0>;
                mux-val = <0x0>;
                mux-mask = <0x1f>;
                mdio0: mdio@0 {
                    #address-cells = <1>;
                    #size-cells = <0>;
                    compatible = "smi";
                    reg = <0x0>;
                    phy0: ethernet-phy@0 {
                        reg = <0x0>;
                    };
                };
                mdio1: mdio@1 {
                    #address-cells = <1>;
                    #size-cells = <0>;
                    compatible = "smi";
                    reg = <0x1>;
                    phy1: ethernet-phy@1 {
                        reg = <0x1>;
                    };
                };
            };
        };
    };
};

最后，需要在设备树中将RTL8111网卡与MV88E6390网卡连接起来：

&rtl8111 {
    mdio-mux = <&rtl8111_mdio_mux>;
};

这样就完成了RTL8111网卡和MV88E6390网卡的连接。