[PATCH v4 2/3] dt-bindings: net: phy: Document support for external PHY clk

[Detlev Casanova <detlev.casanova@xxxxxxxxxxxxx>]

Ethern PHYs can have external an clock that needs to be activated before
communicating with the PHY.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Signed-off-by: Detlev Casanova <detlev.casanova@xxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/net/ethernet-phy.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/ethernet-phy.yaml b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
index 4f574532ee13..c1241c8a3b77 100644
--- a/Documentation/devicetree/bindings/net/ethernet-phy.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-phy.yaml
@@ -93,6 +93,12 @@ properties:
       the turn around line low at end of the control phase of the
       MDIO transaction.
 
+  clocks:
+    maxItems: 1
+    description:
+      External clock connected to the PHY. If not specified it is assumed
+      that the PHY uses a fixed crystal or an internal oscillator.
+
   enet-phy-lane-swap:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
-- 
2.39.3