dt-bindings: net: ftgmac100: describe phy-handle and MDIO

Add the phy-handle and MDIO description and add the example with
PHY and MDIO nodes.

Signed-off-by: Ivan Mikhaylov <i.mikhaylov@yadro.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/Documentation/devicetree/bindings/net/ftgmac100.txt b/Documentation/devicetree/bindings/net/ftgmac100.txt
index f878c1103463578ed6f09f45c63335a2b23f0810..29234021f601db59c67f59b77f304a499b82382d 100644 (file)
--- a/Documentation/devicetree/bindings/net/ftgmac100.txt
+++ b/Documentation/devicetree/bindings/net/ftgmac100.txt
@@ -15,6 +15,7 @@ Required properties:
 - interrupts: Should contain ethernet controller interrupt
 
 Optional properties:
+- phy-handle: See ethernet.txt file in the same directory.
 - phy-mode: See ethernet.txt file in the same directory. If the property is
   absent, "rgmii" is assumed. Supported values are "rgmii*" and "rmii" for
   aspeed parts. Other (unknown) parts will accept any value.
@@ -32,6 +33,9 @@ Optional properties:
       - "MACCLK": The MAC IP clock
       - "RCLK": Clock gate for the RMII RCLK
 
+Optional subnodes:
+- mdio: See mdio.txt file in the same directory.
+
 Example:
 
        mac0: ethernet@1e660000 {
@@ -40,3 +44,24 @@ Example:
                interrupts = <2>;
                use-ncsi;
        };
+
+Example with phy-handle:
+
+       mac1: ethernet@1e680000 {
+               compatible = "aspeed,ast2500-mac", "faraday,ftgmac100";
+               reg = <0x1e680000 0x180>;
+               interrupts = <2>;
+
+               phy-handle = <&phy>;
+               phy-mode = "rgmii";
+
+               mdio {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+
+                       phy: ethernet-phy@1 {
+                               compatible = "ethernet-phy-ieee802.3-c22";
+                               reg = <1>;
+                       };
+               };
+       };