diff --git a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
index d76987ce8e50..bdd83f42615c 100644
--- a/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
+++ b/Documentation/devicetree/bindings/gpio/rockchip,gpio-bank.yaml
@@ -41,6 +41,9 @@ properties:
   "#interrupt-cells":
     const: 2
 
+  power-domains:
+    maxItems: 1
+
 patternProperties:
   "^.+-hog(-[0-9]+)?$":
     type: object