diff --git a/Documentation/devicetree/bindings/iio/dac/microchip,mcp4922.yaml b/Documentation/devicetree/bindings/iio/dac/microchip,mcp4922.yaml
index 12a14b3f36cb..4c430abcdbf9 100644
--- a/Documentation/devicetree/bindings/iio/dac/microchip,mcp4922.yaml
+++ b/Documentation/devicetree/bindings/iio/dac/microchip,mcp4922.yaml
@@ -15,6 +15,7 @@ properties:
     enum:
       - microchip,mcp4902
       - microchip,mcp4912
+      - microchip,mcp4921
       - microchip,mcp4922
 
   reg: