diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index 9970590006d1..678216652bc0 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -88,7 +88,7 @@ struct pinctrl_dev *get_pinctrl_dev_from_dev(struct device *dev,
 	return found ? pctldev : NULL;
 }
 
-struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, int pin)
+struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, unsigned int pin)
 {
 	struct pin_desc *pindesc;
 	unsigned long flags;
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
index dcc6d687b653..74dee439dcf0 100644
--- a/drivers/pinctrl/core.h
+++ b/drivers/pinctrl/core.h
@@ -65,7 +65,7 @@ struct pin_desc {
 
 struct pinctrl_dev *get_pinctrl_dev_from_dev(struct device *dev,
 					     const char *dev_name);
-struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, int pin);
+struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, unsigned int pin);
 int pinctrl_get_device_gpio_range(unsigned gpio,
 				  struct pinctrl_dev **outdev,
 				  struct pinctrl_gpio_range **outrange);