dt-bindings: net: cdns,macb: add a compatible for Microchip pic64hpsc

Add "microchip,pic64hpsc-gem" for "PIC64-HPSC" and
"microchip,pic64hx-gem" for "PIC64HX", compatible with the former.

The generic compatible "cdns,gem" works but offers limited features.
Keep it as a fallback.

The GEM IPs within pic64hpsc have their MDIO controllers unconnected
from any physical pin. Add a check to prevent adding PHYs under the GEM
node.

Signed-off-by: Charles Perry <charles.perry@microchip.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20260313140610.3681752-2-charles.perry@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/Documentation/devicetree/bindings/net/cdns,macb.yaml b/Documentation/devicetree/bindings/net/cdns,macb.yaml
index cb14c35ba99693dc8e71e5bcbab503e0d3219910..feb1683858374ce949e3e865cfac37b4a3d1d0f6 100644 (file)
--- a/Documentation/devicetree/bindings/net/cdns,macb.yaml
+++ b/Documentation/devicetree/bindings/net/cdns,macb.yaml
@@ -70,6 +70,14 @@ properties:
               - microchip,sama7d65-gem   # Microchip SAMA7D65 gigabit ethernet interface
           - const: microchip,sama7g5-gem # Microchip SAMA7G5 gigabit ethernet interface
 
+      - items:
+          - const: microchip,pic64hpsc-gem # Microchip PIC64-HPSC
+          - const: cdns,gem
+      - items:
+          - const: microchip,pic64hx-gem   # Microchip PIC64HX
+          - const: microchip,pic64hpsc-gem # Microchip PIC64-HPSC
+          - const: cdns,gem
+
   reg:
     minItems: 1
     items:
@@ -196,6 +204,17 @@ allOf:
       required:
         - phys
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: microchip,pic64hpsc-gem
+    then:
+      patternProperties:
+        "^ethernet-phy@[0-9a-f]$": false
+      properties:
+        mdio: false
+
 unevaluatedProperties: false
 
 examples: