1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 8cec9a02c0b8..672b192f8153 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -779,7 +779,7 @@ static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer)
         }
 
         timerqueue_add(&rtc->timerqueue, &timer->node);
-        if (!next) {
+        if (!next || ktime_before(timer->node.expires, next->expires)) {
                 struct rtc_wkalrm alarm;
                 int err;
                 alarm.time = rtc_ktime_to_tm(timer->node.expires);
@@ -1004,6 +1004,10 @@ int rtc_read_offset(struct rtc_device *rtc, long *offset)
  * to compensate for differences in the actual clock rate due to temperature,
  * the crystal, capacitor, etc.
  *
+ * The adjustment applied is as follows:
+ *   t = t0 * (1 + offset * 1e-9)
+ * where t0 is the measured length of 1 RTC second with offset = 0
+ *
  * Kernel interface to adjust an rtc clock offset.
  * Return 0 on success, or a negative number on error.
  * If the rtc offset is not setable (or not implemented), return -EINVAL