diff --git a/Documentation/devicetree/bindings/hwmon/gpio-fan.yaml b/Documentation/devicetree/bindings/hwmon/gpio-fan.yaml
index 7f30cfc87350..4faebbb4c7ab 100644
--- a/Documentation/devicetree/bindings/hwmon/gpio-fan.yaml
+++ b/Documentation/devicetree/bindings/hwmon/gpio-fan.yaml
@@ -23,6 +23,9 @@ properties:
   alarm-gpios:
     maxItems: 1
 
+  fan-supply:
+    description: Power supply for fan
+
   gpio-fan,speed-map:
     $ref: /schemas/types.yaml#/definitions/uint32-matrix
     minItems: 2