diff --git a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
index 1bb76197787b..de8e78d56dea 100644
--- a/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/rockchip-saradc.yaml
@@ -18,6 +18,7 @@ properties:
       - items:
           - enum:
               - rockchip,px30-saradc
+              - rockchip,rk1808-saradc
               - rockchip,rk3308-saradc
               - rockchip,rk3328-saradc
               - rockchip,rv1108-saradc