diff --git a/Documentation/devicetree/bindings/riscv/cpus.yaml b/Documentation/devicetree/bindings/riscv/cpus.yaml
index 153d0dac57fb..afb8533f6a08 100644
--- a/Documentation/devicetree/bindings/riscv/cpus.yaml
+++ b/Documentation/devicetree/bindings/riscv/cpus.yaml
@@ -70,6 +70,7 @@ properties:
           - enum:
               - sifive,e51
               - sifive,u54-mc
+              - sifive,x280
           - const: sifive,rocket0
           - const: riscv
       - const: riscv    # Simulator only