Commit 288a91d5 authored by Claudiu Manoil's avatar Claudiu Manoil Committed by David S. Miller
Browse files

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



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: default avatarClaudiu Manoil <claudiu.manoil@nxp.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 231ece36

Documentation/devicetree/bindings/net/fsl-enetc.txt

+39 −3
Original line number Original line Diff line number Diff line
@@ -11,7 +11,9 @@ Required properties: 
		  to parent node bindings.

		  to parent node bindings.

- compatible	: Should be "fsl,enetc".

- 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

In this case, the ENETC node should include a "mdio" sub-node

that in turn should contain the "ethernet-phy" node describing the

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

1.2. Using the central MDIO PCIe endpoint device

connection:



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,

In this case, the ENETC port node defines a fixed link connection,

as specified by Documentation/devicetree/bindings/net/fixed-link.txt.

as specified by Documentation/devicetree/bindings/net/fixed-link.txt.