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dt-bindings: net: fsl: enetc: Add bindings for the central MDIO PCIe endpoint

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The on-chip PCIe root complex that integrates the ENETC ethernet
controllers also integrates a PCIe endpoint for the MDIO controller
providing for centralized control of the ENETC mdio bus.
Add bindings for this "central" MDIO Integrated PCIe Endpoint.

Signed-off-by: Claudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Claudiu Manoil 2019-08-01 14:52:52 +03:00 committed by David S. Miller
parent 231ece36f5
commit 288a91d5cd
1 changed files with 39 additions and 3 deletions
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42
Documentation/devicetree/bindings/net/fsl-enetc.txt
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@ -11,7 +11,9 @@ Required properties:
to parent node bindings.
- compatible : Should be "fsl,enetc".
1) The ENETC external port is connected to a MDIO configurable phy:
1. The ENETC external port is connected to a MDIO configurable phy
1.1. Using the local ENETC Port MDIO interface
In this case, the ENETC node should include a "mdio" sub-node
that in turn should contain the "ethernet-phy" node describing the
@ -47,8 +49,42 @@ Example:
};
};
2) The ENETC port is an internal port or has a fixed-link external
connection:
1.2. Using the central MDIO PCIe endpoint device
In this case, the mdio node should be defined as another PCIe
endpoint node, at the same level with the ENETC port nodes.
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-mdio".
The remaining required mdio bus properties are standard, their bindings
already defined in Documentation/devicetree/bindings/net/mdio.txt.
Example:
ethernet@0,0 {
compatible = "fsl,enetc";
reg = <0x000000 0 0 0 0>;
phy-handle = <&sgmii_phy0>;
phy-connection-type = "sgmii";
};
mdio@0,3 {
compatible = "fsl,enetc-mdio";
reg = <0x000300 0 0 0 0>;
#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 Documentation/devicetree/bindings/net/fixed-link.txt.