120 lines
3.0 KiB
Plaintext
120 lines
3.0 KiB
Plaintext
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* ENETC ethernet device tree bindings
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Depending on board design and ENETC port type (internal or
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external) there are two supported link modes specified by
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below device tree bindings.
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Required properties:
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- reg : Specifies PCIe Device Number and Function
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Number of the ENETC endpoint device, according
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to parent node bindings.
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- compatible : Should be "fsl,enetc".
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1. The ENETC external port is connected to a MDIO configurable phy
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1.1. Using the local ENETC Port MDIO interface
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In this case, the ENETC node should include a "mdio" sub-node
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that in turn should contain the "ethernet-phy" node describing the
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external phy. Below properties are required, their bindings
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already defined in Documentation/devicetree/bindings/net/ethernet.txt or
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Documentation/devicetree/bindings/net/phy.txt.
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Required:
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- phy-handle : Phandle to a PHY on the MDIO bus.
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Defined in ethernet.txt.
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- phy-connection-type : Defined in ethernet.txt.
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- mdio : "mdio" node, defined in mdio.txt.
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- ethernet-phy : "ethernet-phy" node, defined in phy.txt.
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Example:
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ethernet@0,0 {
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compatible = "fsl,enetc";
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reg = <0x000000 0 0 0 0>;
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phy-handle = <&sgmii_phy0>;
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phy-connection-type = "sgmii";
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mdio {
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#address-cells = <1>;
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#size-cells = <0>;
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sgmii_phy0: ethernet-phy@2 {
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reg = <0x2>;
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};
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};
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};
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1.2. Using the central MDIO PCIe endpoint device
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In this case, the mdio node should be defined as another PCIe
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endpoint node, at the same level with the ENETC port nodes.
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Required properties:
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- reg : Specifies PCIe Device Number and Function
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Number of the ENETC endpoint device, according
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to parent node bindings.
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- compatible : Should be "fsl,enetc-mdio".
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The remaining required mdio bus properties are standard, their bindings
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already defined in Documentation/devicetree/bindings/net/mdio.txt.
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Example:
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ethernet@0,0 {
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compatible = "fsl,enetc";
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reg = <0x000000 0 0 0 0>;
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phy-handle = <&sgmii_phy0>;
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phy-connection-type = "sgmii";
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};
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mdio@0,3 {
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compatible = "fsl,enetc-mdio";
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reg = <0x000300 0 0 0 0>;
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#address-cells = <1>;
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#size-cells = <0>;
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sgmii_phy0: ethernet-phy@2 {
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reg = <0x2>;
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};
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};
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2. The ENETC port is an internal port or has a fixed-link external
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connection
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In this case, the ENETC port node defines a fixed link connection,
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as specified by Documentation/devicetree/bindings/net/fixed-link.txt.
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Required:
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- fixed-link : "fixed-link" node, defined in "fixed-link.txt".
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Example:
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ethernet@0,2 {
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compatible = "fsl,enetc";
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reg = <0x000200 0 0 0 0>;
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fixed-link {
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speed = <1000>;
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full-duplex;
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};
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};
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* Integrated Endpoint Register Block bindings
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Optionally, the fsl_enetc driver can probe on the Integrated Endpoint Register
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Block, which preconfigures the FIFO limits for the ENETC ports. This is a node
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with the following properties:
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- reg : Specifies the address in the SoC memory space.
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- compatible : Must be "fsl,ls1028a-enetc-ierb".
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Example:
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ierb@1f0800000 {
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compatible = "fsl,ls1028a-enetc-ierb";
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reg = <0x01 0xf0800000 0x0 0x10000>;
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};
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