diff --git a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml
index 129e32c4c774..610c79863208 100644
--- a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml
+++ b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml
@@ -40,6 +40,9 @@ properties:
       - description: ODR register
       - description: STR register
 
+  clocks:
+    maxItems: 1
+
   aspeed,lpc-io-reg:
     $ref: /schemas/types.yaml#/definitions/uint32-array
     minItems: 1