diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
index 36c85eb3dc0d..09f97fb5596d 100644
--- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
+++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
@@ -135,6 +135,9 @@ properties:
   reset-names:
     const: stmmaceth
 
+  power-domains:
+    maxItems: 1
+
   mac-mode:
     $ref: ethernet-controller.yaml#/properties/phy-connection-type
     description: