diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
index 447be88caf34..95a5bd894e93 100644
--- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
@@ -93,6 +93,9 @@ properties:
       - const: ssi_clk
       - const: pclk
 
+  power-domains:
+    maxItems: 1
+
   resets:
     maxItems: 1