diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
index ac48557df2a40050b12ceb1a2a963cbbda1258ca..1bd6363bc95ef2b0d0bd2b58d733159941c78fa0 100644
--- a/drivers/pinctrl/pinctrl-st.c
+++ b/drivers/pinctrl/pinctrl-st.c
@@ -343,9 +343,9 @@ static const unsigned int stih415_output_delays[] = {0, 1000, 2000, 3000};
 #define STIH415_PCTRL_COMMON_DATA				\
 	.rt_style	= st_retime_style_packed,		\
 	.input_delays	= stih415_input_delays,			\
-	.ninput_delays	= 4,					\
+	.ninput_delays	= ARRAY_SIZE(stih415_input_delays),	\
 	.output_delays = stih415_output_delays,			\
-	.noutput_delays = 4
+	.noutput_delays = ARRAY_SIZE(stih415_output_delays)
 
 static const struct st_pctl_data  stih415_sbc_data = {
 	STIH415_PCTRL_COMMON_DATA,