diff --git a/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml b/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
index 783a85b84893..7e96a625f0cf 100644
--- a/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
+++ b/Documentation/devicetree/bindings/net/nfc/ti,trf7970a.yaml
@@ -58,7 +58,8 @@ properties:
   ti,rx-gain-reduction-db:
     description: |
       Specify an RX gain reduction to reduce antenna sensitivity with 5dB per
-      increment, with a maximum of 15dB. Supported values: [0, 5, 10, 15].
+      increment, with a maximum of 15dB.
+    enum: [ 0, 5, 10, 15]
 
 required:
   - compatible