diff --git a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
index b4200254269070ac902806a9737d2fbbe33632b1..b962f8db4ce973562db98443952fe11e1b4543bc 100644
--- a/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
+++ b/Documentation/devicetree/bindings/serial/snps-dw-apb-uart.yaml
@@ -27,6 +27,7 @@ properties:
               - rockchip,rk3066-uart
               - rockchip,rk3188-uart
               - rockchip,rk3288-uart
+              - rockchip,rk3308-uart
               - rockchip,rk3328-uart
               - rockchip,rk3368-uart
               - rockchip,rk3399-uart