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>

1 files changed, 10 insertions, 0 deletions

diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 6edbb2c55c22..fbfc5f1b7710 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -221,6 +221,11 @@ static int posix_get_boottime(const clockid_t which_clock, struct timespec *tp)
         return 0;
 }
 
+static int posix_get_tai(clockid_t which_clock, struct timespec *tp)
+{
+        timekeeping_clocktai(tp);
+        return 0;
+}
 
 /*
  * Initialize everything, well, just everything in Posix clocks/timers ;)
@@ -261,6 +266,10 @@ static __init int init_posix_timers(void)
                 .clock_getres   = posix_get_coarse_res,
                 .clock_get      = posix_get_monotonic_coarse,
         };
+        struct k_clock clock_tai = {
+                .clock_getres   = hrtimer_get_res,
+                .clock_get      = posix_get_tai,
+        };
         struct k_clock clock_boottime = {
                 .clock_getres   = hrtimer_get_res,
                 .clock_get      = posix_get_boottime,
@@ -278,6 +287,7 @@ static __init int init_posix_timers(void)
         posix_timers_register_clock(CLOCK_REALTIME_COARSE, &clock_realtime_coarse);
         posix_timers_register_clock(CLOCK_MONOTONIC_COARSE, &clock_monotonic_coarse);
         posix_timers_register_clock(CLOCK_BOOTTIME, &clock_boottime);
+        posix_timers_register_clock(CLOCK_TAI, &clock_tai);
 
         posix_timers_cache = kmem_cache_create("posix_timers_cache",
                                         sizeof (struct k_itimer), 0, SLAB_PANIC,