[U-Boot] [PATCH v4 4/5] doc: bindings: add mdio-handle property to ethernet nodes

[Alex Marginean <alexandru.marginean@nxp.com>]

Adds an optional mdio-handle property which identifies a MDIO bus which can
be scanned to find the relevant PHY.  The property is ignored if phy-handle
is also present.

Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com>
---
 doc/device-tree-bindings/net/ethernet.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/doc/device-tree-bindings/net/ethernet.txt b/doc/device-tree-bindings/net/ethernet.txt
index 3fc360523b..9f9629f8d6 100644
--- a/doc/device-tree-bindings/net/ethernet.txt
+++ b/doc/device-tree-bindings/net/ethernet.txt
@@ -9,6 +9,8 @@ The following properties are common to the Ethernet controllers:
 - max-speed: number, specifies maximum speed in Mbit/s supported by the device;
 - max-frame-size: number, maximum transfer unit (IEEE defined MTU), rather than
   the maximum frame size (there's contradiction in ePAPR).
+- mdio-handle: phandle, specifies a reference to a MDIO bus to be scanned to
+  find the PHY device.  Ignored if phy-handle is also present.
 - phy-mode: string, operation mode of the PHY interface; supported values are
   "mii", "gmii", "sgmii", "qsgmii", "tbi", "rev-mii", "rmii", "rgmii", "rgmii-id",
   "rgmii-rxid", "rgmii-txid", "rtbi", "smii", "xgmii"; this is now a de-facto
-- 
2.17.1