1* ENETC ethernet device tree bindings 2 3Depending on board design and ENETC port type (internal or 4external) there are two supported link modes specified by 5below device tree bindings. 6 7Required properties: 8 9- reg : Specifies PCIe Device Number and Function 10 Number of the ENETC endpoint device, according 11 to parent node bindings. 12- compatible : Should be "fsl,enetc". 13 141. The ENETC external port is connected to a MDIO configurable phy 15 161.1. Using the local ENETC Port MDIO interface 17 18In this case, the ENETC node should include a "mdio" sub-node 19that in turn should contain the "ethernet-phy" node describing the 20external phy. Below properties are required, their bindings 21already defined in Documentation/devicetree/bindings/net/ethernet.txt or 22Documentation/devicetree/bindings/net/phy.txt. 23 24Required: 25 26- phy-handle : Phandle to a PHY on the MDIO bus. 27 Defined in ethernet.txt. 28 29- phy-connection-type : Defined in ethernet.txt. 30 31- mdio : "mdio" node, defined in mdio.txt. 32 33- ethernet-phy : "ethernet-phy" node, defined in phy.txt. 34 35Example: 36 37 ethernet@0,0 { 38 compatible = "fsl,enetc"; 39 reg = <0x000000 0 0 0 0>; 40 phy-handle = <&sgmii_phy0>; 41 phy-connection-type = "sgmii"; 42 43 mdio { 44 #address-cells = <1>; 45 #size-cells = <0>; 46 sgmii_phy0: ethernet-phy@2 { 47 reg = <0x2>; 48 }; 49 }; 50 }; 51 521.2. Using the central MDIO PCIe endpoint device 53 54In this case, the mdio node should be defined as another PCIe 55endpoint node, at the same level with the ENETC port nodes. 56 57Required properties: 58 59- reg : Specifies PCIe Device Number and Function 60 Number of the ENETC endpoint device, according 61 to parent node bindings. 62- compatible : Should be "fsl,enetc-mdio". 63 64The remaining required mdio bus properties are standard, their bindings 65already defined in Documentation/devicetree/bindings/net/mdio.txt. 66 67Example: 68 69 ethernet@0,0 { 70 compatible = "fsl,enetc"; 71 reg = <0x000000 0 0 0 0>; 72 phy-handle = <&sgmii_phy0>; 73 phy-connection-type = "sgmii"; 74 }; 75 76 mdio@0,3 { 77 compatible = "fsl,enetc-mdio"; 78 reg = <0x000300 0 0 0 0>; 79 #address-cells = <1>; 80 #size-cells = <0>; 81 sgmii_phy0: ethernet-phy@2 { 82 reg = <0x2>; 83 }; 84 }; 85 862. The ENETC port is an internal port or has a fixed-link external 87connection 88 89In this case, the ENETC port node defines a fixed link connection, 90as specified by Documentation/devicetree/bindings/net/fixed-link.txt. 91 92Required: 93 94- fixed-link : "fixed-link" node, defined in "fixed-link.txt". 95 96Example: 97 ethernet@0,2 { 98 compatible = "fsl,enetc"; 99 reg = <0x000200 0 0 0 0>; 100 fixed-link { 101 speed = <1000>; 102 full-duplex; 103 }; 104 }; 105