diff --git a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml
index 620a52f944e8ffdc6f93374861d206acc32d3ee1..de0b9b5f6a70aaa453c60df71181167b8cfb2a67 100644
--- a/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/fsl-imx-gpio.yaml
@@ -53,6 +53,9 @@ properties:
 
   gpio-ranges: true
 
+  power-domains:
+    maxItems: 1
+
 patternProperties:
   "^(hog-[0-9]+|.+-hog(-[0-9]+)?)$":
     type: object