[PATCH 2/4] dt-bindings: mfd: Add MDIO interface to rtl9301-switch

[Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>]

The MDIO controller is part of the switch on the RTL9300 family of
devices. Add a $ref to the mfd binding for these devices.

Signed-off-by: Chris Packham <chris.packham@xxxxxxxxxxxxxxxxxxx>
---
 .../bindings/mfd/realtek,rtl9301-switch.yaml      | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/realtek,rtl9301-switch.yaml b/Documentation/devicetree/bindings/mfd/realtek,rtl9301-switch.yaml
index f053303ab1e6..eeb08e7435fa 100644
--- a/Documentation/devicetree/bindings/mfd/realtek,rtl9301-switch.yaml
+++ b/Documentation/devicetree/bindings/mfd/realtek,rtl9301-switch.yaml
@@ -41,6 +41,9 @@ patternProperties:
   'i2c@[0-9a-f]+$':
     $ref: /schemas/i2c/realtek,rtl9301-i2c.yaml#
 
+  'mdio@[0-9a-f]+$':
+    $ref: /schemas/net/realtek,rtl9301-mdio.yaml#
+
 required:
   - compatible
   - reg
@@ -110,5 +113,17 @@ examples:
           };
         };
       };
+
+      mdio0: mdio@ca00 {
+        compatible = "realtek,rtl9301-mdio";
+        reg = <0xca00 0x200>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ethernet-phy@0 {
+          reg = <0>;
+          realtek,smi-address = <0 1>;
+        };
+      };
     };
 
-- 
2.47.1