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hrtimer: Add hrtimer support for CLOCK_TAI

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

Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
John Stultz
2013-01-21 17:00:11 -08:00
parent 1ff3c9677b
commit 90adda98b8
5 changed files with 44 additions and 3 deletions
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kernel/time/timekeeping.c
+19 -1
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@@ -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);