diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 62a622159006..dc0bbf198cbc 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -2792,6 +2792,7 @@ static int rockchip_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
 		 * still return -ENOTSUPP as before, to make sure the caller
 		 * of gpiod_set_debounce won't change its behaviour.
 		 */
+		return -ENOTSUPP;
 	default:
 		return -ENOTSUPP;
 	}