diff --git a/drivers/rtc/rtc-fsl-ftm-alarm.c b/drivers/rtc/rtc-fsl-ftm-alarm.c
index e954c51bf39b..039bd2f1a7ee 100644
--- a/drivers/rtc/rtc-fsl-ftm-alarm.c
+++ b/drivers/rtc/rtc-fsl-ftm-alarm.c
@@ -180,7 +180,7 @@ static int ftm_rtc_alarm_irq_enable(struct device *dev,
  */
 static int ftm_rtc_read_time(struct device *dev, struct rtc_time *tm)
 {
-	rtc_time_to_tm(ktime_get_real_seconds(), tm);
+	rtc_time64_to_tm(ktime_get_real_seconds(), tm);
 
 	return 0;
 }
@@ -204,12 +204,13 @@ static int ftm_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 static int ftm_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
 {
 	struct rtc_time tm;
-	unsigned long now, alm_time, cycle;
+	time64_t now, alm_time;
+	unsigned long long cycle;
 	struct ftm_rtc *rtc = dev_get_drvdata(dev);
 
 	ftm_rtc_read_time(dev, &tm);
-	rtc_tm_to_time(&tm, &now);
-	rtc_tm_to_time(&alm->time, &alm_time);
+	now = rtc_tm_to_time64(&tm);
+	alm_time = rtc_tm_to_time64(&alm->time);
 
 	ftm_clean_alarm(rtc);
 	cycle = (alm_time - now) * rtc->alarm_freq;