diff --git a/Documentation/devicetree/bindings/arm/altera.yaml b/Documentation/devicetree/bindings/arm/altera.yaml
index 72cf04b22a08..227665d0016f 100644
--- a/Documentation/devicetree/bindings/arm/altera.yaml
+++ b/Documentation/devicetree/bindings/arm/altera.yaml
@@ -31,6 +31,9 @@ properties:
       - description: Mercury+ AA1 boards
         items:
           - enum:
+              - enclustra,mercury-aa1-pe1
+              - enclustra,mercury-aa1-pe3
+              - enclustra,mercury-aa1-st1
               - enclustra,mercury-pe1
               - google,chameleon-v3
           - const: enclustra,mercury-aa1