Documentation: dtb: xgene: Add MDIO node

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Tested-by: Fushen Chen <fchen@apm.com>
Tested-by: Toan Le <toanle@apm.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 37 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/net/apm-xgene-mdio.txt b/Documentation/devicetree/bindings/net/apm-xgene-mdio.txt
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+APM X-Gene SoC MDIO node
+
+MDIO node is defined to describe on-chip MDIO controller.
+
+Required properties:
+        - compatible: Must be "apm,xgene-mdio-rgmii" or "apm,xgene-mdio-xfi"
+        - #address-cells: Must be <1>.
+        - #size-cells: Must be <0>.
+        - reg: Address and length of the register set
+        - clocks: Reference to the clock entry
+
+For the phys on the mdio bus, there must be a node with the following fields:
+        - compatible: PHY identifier.  Please refer ./phy.txt for the format.
+        - reg: The ID number for the phy.
+
+Example:
+
+        mdio: mdio@17020000 {
+                compatible = "apm,xgene-mdio-rgmii";
+                #address-cells = <1>;
+                #size-cells = <0>;
+                reg = <0x0 0x17020000 0x0 0xd100>;
+                clocks = <&menetclk 0>;
+        };
+
+        /* Board-specific peripheral configurations */
+        &mdio {
+                menetphy: phy@3 {
+                        reg = <0x3>;
+                };
+                sgenet0phy: phy@4 {
+                        reg = <0x4>;
+                };
+                sgenet1phy: phy@5 {
+                        reg = <0x5>;
+                };
+        };