diff --git a/Documentation/devicetree/bindings/sound/realtek,rt5640.yaml b/Documentation/devicetree/bindings/sound/realtek,rt5640.yaml
index 3f4f59287c1c..6bb6e12bdf8b 100644
--- a/Documentation/devicetree/bindings/sound/realtek,rt5640.yaml
+++ b/Documentation/devicetree/bindings/sound/realtek,rt5640.yaml
@@ -44,6 +44,14 @@ properties:
       - realtek,rt5640
       - realtek,rt5639
 
+  clocks:
+    items:
+      - description: phandle and clock specifier for codec MCLK.
+
+  clock-names:
+    items:
+      - const: mclk
+
   reg:
     maxItems: 1