diff --git a/Documentation/devicetree/bindings/regulator/fitipower,fp9931.yaml b/Documentation/devicetree/bindings/regulator/fitipower,fp9931.yaml
index c6585e3bacbe..00d66b923047 100644
--- a/Documentation/devicetree/bindings/regulator/fitipower,fp9931.yaml
+++ b/Documentation/devicetree/bindings/regulator/fitipower,fp9931.yaml
@@ -66,6 +66,7 @@ properties:
 required:
   - compatible
   - reg
+  - vin-supply
   - pg-gpios
   - enable-gpios