diff --git a/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
index 8a3470b64d06..7ed096360be2 100644
--- a/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
+++ b/Documentation/devicetree/bindings/mailbox/fsl,mu.yaml
@@ -38,8 +38,9 @@ properties:
           - const: fsl,imx6sx-mu
       - description: To communicate with i.MX8 SCU with fast IPC
         items:
-          - const: fsl,imx8qxp-mu
           - const: fsl,imx8-mu-scu
+          - const: fsl,imx8qxp-mu
+          - const: fsl,imx6sx-mu
 
   reg:
     maxItems: 1