diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
index 88bf4adf1067..b49fda5e608f 100644
--- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
@@ -23,6 +23,7 @@ properties:
       - items:
           - enum:
               - rockchip,px30-uart
+              - rockchip,rk1808-uart
               - rockchip,rk3036-uart
               - rockchip,rk3066-uart
               - rockchip,rk3188-uart