* ENETC ethernet device tree bindings Depending on board design and ENETC port type (internal or external) there are two supported link modes specified by below device tree bindings. Required properties: - reg : Specifies PCIe Device Number and Function Number of the ENETC endpoint device, according to parent node bindings. - compatible : Should be "fsl,enetc". 1) The ENETC external port is connected to a MDIO configurable phy: In this case, the ENETC node should include a "mdio" sub-node that in turn should contain the "ethernet-phy" node describing the external phy. Below properties are required, their bindings already defined in ethernet.txt or phy.txt, under Documentation/devicetree/bindings/net/*. Required: - phy-handle : Phandle to a PHY on the MDIO bus. Defined in ethernet.txt. - phy-connection-type : Defined in ethernet.txt. - mdio : "mdio" node, defined in mdio.txt. - ethernet-phy : "ethernet-phy" node, defined in phy.txt. Example: ethernet@0,0 { compatible = "fsl,enetc"; reg = <0x000000 0 0 0 0>; phy-handle = <&sgmii_phy0>; phy-connection-type = "sgmii"; mdio { #address-cells = <1>; #size-cells = <0>; sgmii_phy0: ethernet-phy@2 { reg = <0x2>; }; }; }; 2) The ENETC port is an internal port or has a fixed-link external connection: In this case, the ENETC port node defines a fixed link connection, as specified by "fixed-link.txt", under Documentation/devicetree/bindings/net/*. Required: - fixed-link : "fixed-link" node, defined in "fixed-link.txt". Example: ethernet@0,2 { compatible = "fsl,enetc"; reg = <0x000200 0 0 0 0>; fixed-link { speed = <1000>; full-duplex; }; };