hrtimer: Add hrtimer support for CLOCK_TAI

Add hrtimer support for CLOCK_TAI, as well as posix timer interfaces.

Signed-off-by: John Stultz <john.stultz@linaro.org>

1 files changed, 19 insertions, 1 deletions

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 8a842756572d..8061ae0be7bd 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -67,6 +67,7 @@ static void tk_set_wall_to_mono(struct timekeeper *tk, struct timespec wtm)
         tk->wall_to_monotonic = wtm;
         set_normalized_timespec(&tmp, -wtm.tv_sec, -wtm.tv_nsec);
         tk->offs_real = timespec_to_ktime(tmp);
+        tk->offs_tai = ktime_sub(tk->offs_real, ktime_set(tk->tai_offset, 0));
 }
 
 static void tk_set_sleep_time(struct timekeeper *tk, struct timespec t)
@@ -409,6 +410,20 @@ void timekeeping_clocktai(struct timespec *ts)
 EXPORT_SYMBOL(timekeeping_clocktai);
 
 
+/**
+ * ktime_get_clocktai - Returns the TAI time of day in a ktime
+ *
+ * Returns the time of day in a ktime.
+ */
+ktime_t ktime_get_clocktai(void)
+{
+        struct timespec ts;
+
+        timekeeping_clocktai(&ts);
+        return timespec_to_ktime(ts);
+}
+EXPORT_SYMBOL(ktime_get_clocktai);
+
 #ifdef CONFIG_NTP_PPS
 
 /**
@@ -569,6 +584,7 @@ s32 timekeeping_get_tai_offset(void)
 void __timekeeping_set_tai_offset(struct timekeeper *tk, s32 tai_offset)
 {
         tk->tai_offset = tai_offset;
+        tk->offs_tai = ktime_sub(tk->offs_real, ktime_set(tai_offset, 0));
 }
 
 /**
@@ -1539,7 +1555,8 @@ void get_xtime_and_monotonic_and_sleep_offset(struct timespec *xtim,
  * Returns current monotonic time and updates the offsets
  * Called from hrtimer_interupt() or retrigger_next_event()
  */
-ktime_t ktime_get_update_offsets(ktime_t *offs_real, ktime_t *offs_boot)
+ktime_t ktime_get_update_offsets(ktime_t *offs_real, ktime_t *offs_boot,
+                                                        ktime_t *offs_tai)
 {
         struct timekeeper *tk = &timekeeper;
         ktime_t now;
@@ -1554,6 +1571,7 @@ ktime_t ktime_get_update_offsets(ktime_t *offs_real, ktime_t *offs_boot)
 
                 *offs_real = tk->offs_real;
                 *offs_boot = tk->offs_boot;
+                *offs_tai = tk->offs_tai;
         } while (read_seqretry(&tk->lock, seq));
 
         now = ktime_add_ns(ktime_set(secs, 0), nsecs);