diff --git a/drivers/pinctrl/spear/pinctrl-plgpio.c b/drivers/pinctrl/spear/pinctrl-plgpio.c
index 6b090be61774..0a7f0bdbaa7d 100644
--- a/drivers/pinctrl/spear/pinctrl-plgpio.c
+++ b/drivers/pinctrl/spear/pinctrl-plgpio.c
@@ -441,7 +441,7 @@ static int spear310_p2o(int pin)
 	return offset;
 }
 
-int spear310_o2p(int offset)
+static int spear310_o2p(int offset)
 {
 	if (offset <= 3)
 		return 101 - offset;