patternProperties:
   "^dai-link-[0-9]+$":
     type: object
+    additionalProperties: false
     description: |-
       dai-link child nodes:
         Container for dai-link level properties and the CODEC sub-nodes.
     patternProperties:
       "^codec-[0-9]+$":
         type: object
+        additionalProperties: false
         description: |-
           Codecs:
           dai-link representing backend links should have at least one subnode.
 
 patternProperties:
   "^endpoint(@[0-9a-f]+)?":
     $ref: /schemas/graph.yaml#/$defs/endpoint-base
+    unevaluatedProperties: false
+
     properties:
       mclk-fs:
         description: |
 
       cpu:
         description: Holds subnode which indicates cpu dai.
         type: object
+        additionalProperties: false
+
         properties:
           sound-dai:
             maxItems: 1
       codec:
         description: Holds subnode which indicates codec dai.
         type: object
+        additionalProperties: false
+
         properties:
           sound-dai:
             maxItems: 1
 
       cpu:
         description: Holds subnode which indicates cpu dai.
         type: object
+        additionalProperties: false
         properties:
           sound-dai:
             maxItems: 1
       codec:
         description: Holds subnode which indicates codec dai.
         type: object
+        additionalProperties: false
         properties:
           sound-dai:
             minItems: 1
 
 
   headset-codec:
     type: object
+    additionalProperties: false
+
     properties:
       sound-dai:
         $ref: /schemas/types.yaml#/definitions/phandle
 
   speaker-codecs:
     type: object
+    additionalProperties: false
+
     properties:
       sound-dai:
         minItems: 1
 
       cpu:
         description: Holds subnode which indicates cpu dai.
         type: object
+        additionalProperties: false
+
         properties:
           sound-dai:
             maxItems: 1
       platform:
         description: Holds subnode which indicates platform dai.
         type: object
+        additionalProperties: false
+
         properties:
           sound-dai:
             maxItems: 1
       codec:
         description: Holds subnode which indicates codec dai.
         type: object
+        additionalProperties: false
+
         properties:
           sound-dai:
             minItems: 1
 
     patternProperties:
       "^dvc-[0-1]$":
         type: object
+        additionalProperties: false
+
         properties:
           dmas:
             maxItems: 1
     patternProperties:
       "^mix-[0-1]$":
         type: object
-        # no properties
+        additionalProperties: false
     additionalProperties: false
 
   rcar_sound,ctu:
     patternProperties:
       "^ctu-[0-7]$":
         type: object
-        # no properties
+        additionalProperties: false
     additionalProperties: false
 
   rcar_sound,src:
     patternProperties:
       "^src-[0-9]$":
         type: object
+        additionalProperties: false
+
         properties:
           interrupts:
             maxItems: 1
     patternProperties:
       "^ssiu-[0-9]+$":
         type: object
+        additionalProperties: false
+
         properties:
           dmas:
             maxItems: 2
     patternProperties:
       "^ssi-[0-9]$":
         type: object
+        additionalProperties: false
+
         properties:
           interrupts:
             maxItems: 1
     patternProperties:
       "^dai([0-9]+)?$":
         type: object
+        additionalProperties: false
+
         properties:
           playback:
             $ref: /schemas/types.yaml#/definitions/phandle-array
 
 
   cpu:
     type: object
+    additionalProperties: false
     properties:
       sound-dai:
         minItems: 2
       - sound-dai
 
   codec:
+    additionalProperties: false
     type: object
     properties:
       sound-dai:
 
 
   cpu:
     type: object
+    additionalProperties: false
     properties:
       sound-dai:
         maxItems: 1
 
   codec:
     type: object
+    additionalProperties: false
     properties:
       sound-dai:
         maxItems: 1
 
 
   codec:
     type: object
+    additionalProperties: false
     properties:
       sound-dai:
         description: List of phandles to the CODEC and HDMI IP nodes.
 
   cpu:
     type: object
+    additionalProperties: false
     properties:
       sound-dai:
         description: Phandle to the Samsung I2S controller.
 
 patternProperties:
   "^audio-controller@[0-9a-f]+$":
     type: object
+    additionalProperties: false
     description:
       Two subnodes corresponding to SAI sub-block instances A et B
       can be defined. Subnode can be omitted for unsused sub-block.