From: Shaohui Xie <redacted>

PCS PHY can support backplane (1000BASE-KX and 10GBASE-KR), this needs
to change corresponding serdes lane settings, so a reference is needed
for serdes lane. This patch describes properties needed for PCS PHY to
support backplane.

Signed-off-by: Shaohui Xie <redacted>
---
changes in v2:
addressed Rob's comments.
based on http://patchwork.ozlabs.org/patch/560936/

 Documentation/devicetree/bindings/powerpc/fsl/fman.txt | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/powerpc/fsl/fman.txt b/Documentation/devicetree/bindings/powerpc/fsl/fman.txt
index 55c2c03..5ca909a 100644
--- a/Documentation/devicetree/bindings/powerpc/fsl/fman.txt
+++ b/Documentation/devicetree/bindings/powerpc/fsl/fman.txt

@@ -432,6 +432,16 @@ example of how to define a PHY (Internal PHY has no interrupt line).
 - For "fsl,fman-mdio" compatible internal mdio bus, the PHY is TBI PHY.
 - For "fsl,fman-memac-mdio" compatible internal mdio bus, the PHY is PCS PHY,
   PCS PHY addr must be '0'.
+  PCS PHY can support backplane (1000BASE-KX and 10GBASE-KR), this needs to
+  change the corresponding serdes lane settings.
+
+  PCS PHY node properties required for backplane:
+
+  - compatible: must be "ethernet-phy-ieee802.3-c45".
+  - phy-mode: string, operation mode of the PHY interface; must be "1000base-kx"
+    for 1000BASE-KX, or "10gbase-kr" for 10GBASE-KR.
+  - fsl-lane-handle: phandle, specifies a reference to a node representing a Serdes.
+  - fsl-lane-reg: offset and length of the register set for the serdes lane.