diff --git a/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml
index b486f41df65f..d6539723f354 100644
--- a/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/rockchip,pinctrl.yaml
@@ -132,7 +132,7 @@ additionalProperties:
               description:
                 Pin bank index.
             - minimum: 0
-              maximum: 10
+              maximum: 13
               description:
                 Mux 0 means GPIO and mux 1 to N means
                 the specific device function.