diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7292.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7292.yaml
index 108d202b288f76af801b105d6536f65d29b89eff..a3e39a40c9b3ea5df8d5b06ba00790aa69293e57 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7292.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7292.yaml
@@ -45,10 +45,10 @@ required:
 
 patternProperties:
   "^channel@[0-7]$":
+    $ref: "adc.yaml"
     type: object
     description: |
       Represents the external channels which are connected to the ADC.
-      See Documentation/devicetree/bindings/iio/adc/adc.txt.
 
     properties:
       reg:
@@ -58,13 +58,13 @@ patternProperties:
           - minimum: 0
             maximum: 7
 
-      diff-channels:
-        description: see Documentation/devicetree/bindings/iio/adc/adc.txt
-        maxItems: 1
+      diff-channels: true
 
     required:
       - reg
 
+    additionalProperties: true
+
 additionalProperties: false
 
 examples: