timekeeping: Add CLOCK_TAI clockid

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / time / timekeeping.c

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 937098a..8a84275 100644 (file)
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -379,6 +379,36 @@ void ktime_get_ts(struct timespec *ts)
 }
 EXPORT_SYMBOL_GPL(ktime_get_ts);
 
+
+/**
+ * timekeeping_clocktai - Returns the TAI time of day in a timespec
+ * @ts:                pointer to the timespec to be set
+ *
+ * Returns the time of day in a timespec.
+ */
+void timekeeping_clocktai(struct timespec *ts)
+{
+       struct timekeeper *tk = &timekeeper;
+       unsigned long seq;
+       u64 nsecs;
+
+       WARN_ON(timekeeping_suspended);
+
+       do {
+               seq = read_seqbegin(&tk->lock);
+
+               ts->tv_sec = tk->xtime_sec + tk->tai_offset;
+               nsecs = timekeeping_get_ns(tk);
+
+       } while (read_seqretry(&tk->lock, seq));
+
+       ts->tv_nsec = 0;
+       timespec_add_ns(ts, nsecs);
+
+}
+EXPORT_SYMBOL(timekeeping_clocktai);
+
+
 #ifdef CONFIG_NTP_PPS
 
 /**