diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c
index a025b40d246bdb66b9556d4fdb306d4cbe3fe8ca..22c6ad0dd573d3dc8bf6b8733d52de887bf6ad22 100644
--- a/drivers/pinctrl/pinctrl-at91-pio4.c
+++ b/drivers/pinctrl/pinctrl-at91-pio4.c
@@ -421,8 +421,8 @@ static int atmel_pctl_get_group_pins(struct pinctrl_dev *pctldev,
 	return 0;
 }
 
-struct atmel_group *atmel_pctl_find_group_by_pin(struct pinctrl_dev *pctldev,
-						 unsigned pin)
+static struct atmel_group *
+atmel_pctl_find_group_by_pin(struct pinctrl_dev *pctldev, unsigned pin)
 {
 	struct atmel_pioctrl *atmel_pioctrl = pinctrl_dev_get_drvdata(pctldev);
 	int i;
@@ -1074,7 +1074,7 @@ static int atmel_pinctrl_probe(struct platform_device *pdev)
 	return ret;
 }
 
-int atmel_pinctrl_remove(struct platform_device *pdev)
+static int atmel_pinctrl_remove(struct platform_device *pdev)
 {
 	struct atmel_pioctrl *atmel_pioctrl = platform_get_drvdata(pdev);