diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c b/drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c
index 50a16f3bd131..8bcd566593ae 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sunxi-dt.c
@@ -84,6 +84,7 @@ static struct sunxi_desc_pin *init_pins_table(struct device *dev,
 	 * Find the total number of pins.
 	 * Also work out how much memory we need to store all the pin names.
 	 */
+	desc->npins = 0;
 	for (i = 0; i < SUNXI_PINCTRL_MAX_BANKS; i++) {
 		desc->npins += pins_per_bank[i];
 		if (pins_per_bank[i] < 10) {