我们的板子也是用2016.3的内核，网口不通，在论坛上找到的答案说是devicetree的问题，先记录下来，看看结果怎么样;

之前的devicetree结构：

        ethernet@e000b000 {
            compatible = "cdns,zynq-gem", "cdns,gem";
            reg = <0xe000b000 0x1000>;
            status = "okay";
            interrupts = <0x0 0x16 0x4>;
            clocks = <0x1 0x1e 0x1 0x1e 0x1 0xd>;
            clock-names = "pclk", "hclk", "tx_clk";
            #address-cells = <0x1>;
            #size-cells = <0x0>;
            local-mac-address = [00 0a 35 00 00 00];
            phy-mode = "rgmii-id";
            xlnx,ptp-enet-clock = <0x6750918>;
            phy-handle = <0x4>;

            mdio {
                #address-cells = <0x1>;
                #size-cells = <0x0>;

                phy@1 {
                    compatible = "realtek,RTL8211E";
                    device_type = "ethernet-phy";
                    reg = <0x1>;
                    linux,phandle = <0x4>;
                    phandle = <0x4>;
                };
            };
        };

        ethernet@e000b000 {
            compatible = "cdns,zynq-gem", "cdns,gem";
            reg = <0xe000b000 0x1000>;
            status = "okay";
            interrupts = <0x0 0x16 0x4>;
            clocks = <0x1 0x1e 0x1 0x1e 0x1 0xd>;
            clock-names = "pclk", "hclk", "tx_clk";
            #address-cells = <0x1>;
            #size-cells = <0x0>;
            local-mac-address = [00 0a 35 00 00 00];
            phy-mode = "rgmii-id";
            xlnx,ptp-enet-clock = <0x6750918>;
            ethernet-phy@1 {
                compatible = "realtek,RTL8211E";
                device_type = "ethernet-phy";
                reg = <0x1>;
            };
        };

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