[PATCH net-next 1/3] dt-bindings: net: realtek,rtl9301-mdio: Add clock-frequency

[Markus Stockhausen <markus.stockhausen@gmx.de>]

The Realtek Otto Switch ethernet MDIO controller supports different MDC
speeds ranging from 1.25MHz to 10MHz. Document the clock-frequency
attribute for the device tree.

There is neither an offical documentation nor any obvious registers that
indicate a dependency to one of the hardware clocks. The usable setup bits
are more like hardcoded values than dividers. Without further details do
not add a clock reference.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
---
 .../devicetree/bindings/net/realtek,rtl9301-mdio.yaml          | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/realtek,rtl9301-mdio.yaml b/Documentation/devicetree/bindings/net/realtek,rtl9301-mdio.yaml
index 67e0b23a8470..6db3315ce96b 100644
--- a/Documentation/devicetree/bindings/net/realtek,rtl9301-mdio.yaml
+++ b/Documentation/devicetree/bindings/net/realtek,rtl9301-mdio.yaml
@@ -56,6 +56,9 @@ patternProperties:
       reg:
         maxItems: 1
 
+      clock-frequency:
+        default: 2500000
+
     required:
       - reg
 
-- 
2.55.0