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authorJohn Stultz <john.stultz@linaro.org>2012-05-03 12:43:40 -0700
committerJohn Stultz <john.stultz@linaro.org>2013-03-22 16:19:59 -0700
commit1ff3c9677bff7e468e0c487d0ffefe4e901d33f4 (patch)
tree202cef5857654e15eb471c2216f37f995f1c6e2f /kernel/time/timekeeping.c
parentcc244ddae6d4c6902ac9d7d64023534f8c44a7eb (diff)
downloadlinaro-lsk-1ff3c9677bff7e468e0c487d0ffefe4e901d33f4.tar.gz
timekeeping: Add CLOCK_TAI clockid
This add a CLOCK_TAI clockid and the needed accessors. CC: Thomas Gleixner <tglx@linutronix.de> CC: Eric Dumazet <eric.dumazet@gmail.com> CC: Richard Cochran <richardcochran@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel/time/timekeeping.c')
-rw-r--r--kernel/time/timekeeping.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 937098aab49..8a842756572 100644
--- 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
/**