diff --git a/Documentation/devicetree/bindings/arm/altera.yaml b/Documentation/devicetree/bindings/arm/altera.yaml
index 30ef03c53d73..72cf04b22a08 100644
--- a/Documentation/devicetree/bindings/arm/altera.yaml
+++ b/Documentation/devicetree/bindings/arm/altera.yaml
@@ -62,6 +62,16 @@ properties:
           - const: altr,socfpga-cyclone5
           - const: altr,socfpga
 
+      - description: Mercury+ SA2 boards
+        items:
+          - enum:
+              - enclustra,mercury-sa2-pe1
+              - enclustra,mercury-sa2-pe3
+              - enclustra,mercury-sa2-st1
+          - const: enclustra,mercury-sa2
+          - const: altr,socfpga-cyclone5
+          - const: altr,socfpga
+
       - description: Stratix 10 boards
         items:
           - enum: