diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.yaml b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
index e71bfb04d7f1..a02f6d12773e 100644
--- a/Documentation/devicetree/bindings/ata/ahci-platform.yaml
+++ b/Documentation/devicetree/bindings/ata/ahci-platform.yaml
@@ -108,6 +108,9 @@ properties:
       some embedded SoCs.
     maximum: 0x1f
 
+  power-domains:
+    maxItems: 1
+
   resets:
     maxItems: 1