diff --git a/Documentation/devicetree/bindings/regulator/gpio-regulator.yaml b/Documentation/devicetree/bindings/regulator/gpio-regulator.yaml
index f7e3d8fd3bf3..6c3371d706bb 100644
--- a/Documentation/devicetree/bindings/regulator/gpio-regulator.yaml
+++ b/Documentation/devicetree/bindings/regulator/gpio-regulator.yaml
@@ -85,6 +85,9 @@ properties:
       - current
     default: voltage
 
+  vin-supply:
+    description: Input supply phandle.
+
 required:
   - compatible
   - regulator-name