The MDIO controlled Realtek switches (distinguished by the reg property
being used) are allowed to have their MDIO bus registered OF-based. Allow
the mdio property for them.

Only the SMI controlled Realtek switches require the compatible property of
the mdio child node. Require it for them and disallow it for the MDIO controlled
ones.

Remove the unnecessary if:then:not:required rule and comments.

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
---
 .../devicetree/bindings/net/dsa/realtek.yaml  | 20 ++++++++-----------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/dsa/realtek.yaml b/Documentation/devicetree/bindings/net/dsa/realtek.yaml
index cfd69c2604ea..7eb025df0df8 100644
--- a/Documentation/devicetree/bindings/net/dsa/realtek.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/realtek.yaml
@@ -109,18 +109,19 @@ if:
 
 then:
   $ref: /schemas/spi/spi-peripheral-props.yaml#
-  not:
-    required:
-      - mdc-gpios
-      - mdio-gpios
-      - mdio
-
   properties:
     mdc-gpios: false
     mdio-gpios: false
-    mdio: false
+    mdio:
+      properties:
+        compatible: false
 
 else:
+  properties:
+    mdio:
+      required:
+        - compatible
+
   required:
     - mdc-gpios
     - mdio-gpios
@@ -130,11 +131,6 @@ else:
 required:
   - compatible
 
-    #  - mdc-gpios
-    #  - mdio-gpios
-    #  - reset-gpios
-    #  - mdio
-
 unevaluatedProperties: false
 
 examples:
-- 
2.39.2