diff --git a/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml b/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml
index b4e744ebffd1..a7eb7ad85a94 100644
--- a/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml
+++ b/Documentation/devicetree/bindings/ufs/samsung,exynos-ufs.yaml
@@ -61,6 +61,9 @@ properties:
   phy-names:
     const: ufs-phy
 
+  power-domains:
+    maxItems: 1
+
   samsung,sysreg:
     $ref: /schemas/types.yaml#/definitions/phandle-array
     items: