diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
index a88e650e910b..a37a14fba9f6 100644
--- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
@@ -135,35 +135,6 @@ properties:
       the ethsys.
     maxItems: 1
 
-patternProperties:
-  "^(ethernet-)?ports$":
-    type: object
-
-    patternProperties:
-      "^(ethernet-)?port@[0-9]+$":
-        type: object
-        description: Ethernet switch ports
-
-        unevaluatedProperties: false
-
-        properties:
-          reg:
-            description:
-              Port address described must be 5 or 6 for CPU port and from 0
-              to 5 for user ports.
-
-        allOf:
-          - $ref: dsa-port.yaml#
-          - if:
-              properties:
-                label:
-                  items:
-                    - const: cpu
-            then:
-              required:
-                - reg
-                - phy-mode
-
 required:
   - compatible
   - reg
@@ -187,10 +158,201 @@ allOf:
           items:
             - const: mediatek,mt7530
     then:
+      patternProperties:
+        "^(ethernet-)?ports$":
+          type: object
+
+          patternProperties:
+            "^(ethernet-)?port@[0-9]+$":
+              type: object
+              description: Ethernet switch ports
+
+              unevaluatedProperties: false
+
+              properties:
+                reg:
+                  description:
+                    Port address described must be 5 or 6 for CPU port and from
+                    0 to 5 for user ports.
+
+              allOf:
+                - $ref: dsa-port.yaml#
+                - if:
+                    properties:
+                      label:
+                        items:
+                          - const: cpu
+                  then:
+                    allOf:
+                      - if:
+                          properties:
+                            reg:
+                              const: 5
+                        then:
+                          properties:
+                            phy-mode:
+                              enum:
+                                - gmii
+                                - mii
+                                - rgmii
+
+                      - if:
+                          properties:
+                            reg:
+                              const: 6
+                        then:
+                          properties:
+                            phy-mode:
+                              enum:
+                                - rgmii
+                                - trgmii
+
+                    properties:
+                      reg:
+                        enum:
+                          - 5
+                          - 6
+
+                    required:
+                      - phy-mode
+
       required:
         - core-supply
         - io-supply
 
+  - if:
+      properties:
+        compatible:
+          items:
+            - const: mediatek,mt7531
+    then:
+      patternProperties:
+        "^(ethernet-)?ports$":
+          type: object
+
+          patternProperties:
+            "^(ethernet-)?port@[0-9]+$":
+              type: object
+              description: Ethernet switch ports
+
+              unevaluatedProperties: false
+
+              properties:
+                reg:
+                  description:
+                    Port address described must be 5 or 6 for CPU port and from
+                    0 to 5 for user ports.
+
+              allOf:
+                - $ref: dsa-port.yaml#
+                - if:
+                    properties:
+                      label:
+                        items:
+                          - const: cpu
+                  then:
+                    allOf:
+                      - if:
+                          properties:
+                            reg:
+                              const: 5
+                        then:
+                          properties:
+                            phy-mode:
+                              enum:
+                                - 1000base-x
+                                - 2500base-x
+                                - rgmii
+                                - sgmii
+
+                      - if:
+                          properties:
+                            reg:
+                              const: 6
+                        then:
+                          properties:
+                            phy-mode:
+                              enum:
+                                - 1000base-x
+                                - 2500base-x
+                                - sgmii
+
+                    properties:
+                      reg:
+                        enum:
+                          - 5
+                          - 6
+
+                    required:
+                      - phy-mode
+
+  - if:
+      properties:
+        compatible:
+          items:
+            - const: mediatek,mt7621
+    then:
+      patternProperties:
+        "^(ethernet-)?ports$":
+          type: object
+
+          patternProperties:
+            "^(ethernet-)?port@[0-9]+$":
+              type: object
+              description: Ethernet switch ports
+
+              unevaluatedProperties: false
+
+              properties:
+                reg:
+                  description:
+                    Port address described must be 5 or 6 for CPU port and from
+                    0 to 5 for user ports.
+
+              allOf:
+                - $ref: dsa-port.yaml#
+                - if:
+                    properties:
+                      label:
+                        items:
+                          - const: cpu
+                  then:
+                    allOf:
+                      - if:
+                          properties:
+                            reg:
+                              const: 5
+                        then:
+                          properties:
+                            phy-mode:
+                              enum:
+                                - gmii
+                                - mii
+                                - rgmii
+
+                      - if:
+                          properties:
+                            reg:
+                              const: 6
+                        then:
+                          properties:
+                            phy-mode:
+                              enum:
+                                - rgmii
+                                - trgmii
+
+                    properties:
+                      reg:
+                        enum:
+                          - 5
+                          - 6
+
+                    required:
+                      - phy-mode
+
+      required:
+        - mediatek,mcm
+
 unevaluatedProperties: false
 
 examples:
