diff --git a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
index a27cb4fa490f..530ef5a75a2f 100644
--- a/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
+++ b/Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.yaml
@@ -49,17 +49,6 @@ description: |
   * mt7621: phy-mode = "rgmii-txid";
   * mt7623: phy-mode = "rgmii";
 
-  CPU-Ports need a phy-mode property:
-    Allowed values on mt7530 and mt7621:
-      - "rgmii"
-      - "trgmii"
-    On mt7531:
-      - "1000base-x"
-      - "2500base-x"
-      - "rgmii"
-      - "sgmii"
-
-
 properties:
   compatible:
     oneOf:
@@ -177,6 +166,36 @@ allOf:
                         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
 
@@ -206,6 +225,38 @@ allOf:
                         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
 
@@ -235,6 +286,36 @@ allOf:
                         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
 
