[PATCH v3 6/9] add documentation for SerDes nodes

@@ -2274,6 +2274,35 @@ platforms are moved over to use the flattened-device-tree model.
 		phy-handle = < &serdes1 >;
         };
 
+    p) SerDes nodes
+
+    SerDes is a serializer/deserializer used by some Freescale SoC.
+
+    Required properties:
+
+    - compatible : Should specify what this SerDes controller is compatible
+      with.  Currently, this is most likely to be "fsl,serdes".
+    - reg : Offset and length of the register set for the device.
+    - protocol : Which up layer protocol is running on the serial
+      interface.  Could be "sata", "pcie", "sgmii".
+    - clock : Input clock frequency for SerDes in unit of MHz.
+
+    Optional properties:
+
+    - vdd-1v : Define this property when Vdd is 1V.
+    - pcie-x2 : Define this property when using PCI Express x2 interface.
+      Valid only when protocol is set to "pcie".
+
+   Example:
+
+	serdes1:serdes@e3000 {
+		compatible = "fsl,serdes";
+		reg = <e3000 100>;
+		vdd-1v;
+		protocol = "sata";
+		clock = <d#100>;
+	};
+
    More devices will be defined as this spec matures.
 
 VII - Specifying interrupt information for devices