[PATCH net-next 3/3] dt-bindings: net: dsa: Document dsa,tag-protocol property

[Tobias Waldekranz <tobias@xxxxxxxxxxxxxx>]

The 'dsa,tag-protocol' is used to force a switch tree to use a
particular tag protocol, typically because the Ethernet controller
that it is connected to is not compatible with the default one.

Signed-off-by: Tobias Waldekranz <tobias@xxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/net/dsa/dsa.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/dsa/dsa.yaml b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
index 8a3494db4d8d..5dcfab049aa2 100644
--- a/Documentation/devicetree/bindings/net/dsa/dsa.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/dsa.yaml
@@ -70,6 +70,13 @@ patternProperties:
               device is what the switch port is connected to
             $ref: /schemas/types.yaml#/definitions/phandle
 
+          dsa,tag-protocol:
+            description:
+              Instead of the default, the switch will use this tag protocol if
+              possible. Useful when a device supports multiple protcols and
+              the default is incompatible with the Ethernet device.
+            $ref: /schemas/types.yaml#/definitions/string
+
           phy-handle: true
 
           phy-mode: true
-- 
2.25.1