1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/pps_kernel.h b/include/linux/pps_kernel.h
index 94048547f29a..0cc45ae1afd5 100644
--- a/include/linux/pps_kernel.h
+++ b/include/linux/pps_kernel.h
@@ -116,5 +116,14 @@ static inline void pps_get_ts(struct pps_event_time *ts)
 
 #endif /* CONFIG_NTP_PPS */
 
+/* Subtract known time delay from PPS event time(s) */
+static inline void pps_sub_ts(struct pps_event_time *ts, struct timespec delta)
+{
+        ts->ts_real = timespec_sub(ts->ts_real, delta);
+#ifdef CONFIG_NTP_PPS
+        ts->ts_raw = timespec_sub(ts->ts_raw, delta);
+#endif
+}
+
 #endif /* LINUX_PPS_KERNEL_H */