[PATCH 3/3] Docs: dt: fsl-mc: update binding to define dpmac subnodes

[Stuart Yoder <stuart.yoder@freescale.com>]

The fsl-mc node may optionally have dpmac sub-nodes that describe
the relationship between the Ethernet MACs which belong to the MC
and the Ethernet PHYs on the system board.

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
---
 .../devicetree/bindings/misc/fsl,qoriq-mc.txt      | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
index 848975f..6611a7c 100644
--- a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
+++ b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
@@ -55,6 +55,40 @@ Required properties:
         Value type: <u32>
         Definition: Must be 1.
 
+Sub-nodes:
+
+        The fsl-mc node may optionally have dpmac sub-nodes that describe
+        the relationship between the Ethernet MACs which belong to the MC
+        and the Ethernet PHYs on the system board.
+
+        The dpmac nodes must be under a node named "dpmacs" which contains
+        the following properties:
+
+            - #address-cells
+              Value type: <u32>
+              Definition: Must be present if dpmac sub-nodes are defined and must
+                          have a value of 1.
+
+            - #size-cells
+              Value type: <u32>
+              Definition: Must be present if dpmac sub-nodes are defined and must
+                          have a value of 0.
+
+        These nodes must have the following properties:
+
+            - compatible
+              Value type: <string>
+              Definition: Must be "fsl,qoriq-mc-dpmac".
+
+            - reg
+              Value type: <prop-encoded-array>
+              Definition: Specifies the id of the dpmac.
+
+            - phy-handle
+              Value type: <phandle>
+              Definition: Specifies the phandle to the PHY device node associated
+                          with the this dpmac.
+
 Example:
 
         fsl_mc: fsl-mc@80c000000 {
@@ -71,4 +105,15 @@ Example:
                  */
                 ranges = <0x0 0x0 0x0 0x8 0x0c000000 0x4000000
                           0x1 0x0 0x0 0x8 0x18000000 0x8000000>;
+
+                dpmacs {
+                    #address-cells = <1>;
+                    #size-cells = <0>;
+
+                    dpmac@1 {
+                        compatible = "fsl,qoriq-mc-dpmac";
+                        reg = <1>;
+                        phy-handle = <&mdio0_phy0>;
+                    }
+                }
         };
-- 
2.3.3