diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2025-06-25 20:38:46 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2025-06-27 20:13:13 +0200 |
| commit | ecf3e70304911be1c14cd21baa0bc611a53ec50b (patch) | |
| tree | de036bfc5013f5f8c7636cf938ef91e2410235b9 | |
| parent | 4eca49d0b621b314ac7c80f363932ec6f6c8abc8 (diff) | |
timekeeping: Provide adjtimex() for auxiliary clocks
The behaviour is close to clock_adtime(CLOCK_REALTIME) with the
following differences:
1) ADJ_SETOFFSET adjusts the auxiliary clock offset
2) ADJ_TAI is not supported
3) Leap seconds are not supported
4) PPS is not supported
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: John Stultz <jstultz@google.com>
Link: https://lore.kernel.org/all/20250625183758.317946543@linutronix.de
| -rw-r--r-- | kernel/time/timekeeping.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 6770544f8c0e..523670ec0d2e 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -2875,10 +2875,26 @@ static int aux_clock_set(const clockid_t id, const struct timespec64 *tnew) return 0; } +static int aux_clock_adj(const clockid_t id, struct __kernel_timex *txc) +{ + struct tk_data *aux_tkd = aux_get_tk_data(id); + struct adjtimex_result result = { }; + + if (!aux_tkd) + return -ENODEV; + + /* + * @result is ignored for now as there are neither hrtimers nor a + * RTC related to auxiliary clocks for now. + */ + return __do_adjtimex(aux_tkd, txc, &result); +} + const struct k_clock clock_aux = { .clock_getres = aux_get_res, .clock_get_timespec = aux_get_timespec, .clock_set = aux_clock_set, + .clock_adj = aux_clock_adj, }; static __init void tk_aux_setup(void) |