diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/clockevents.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index c69e88c9444..22a9da9a9c9 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -238,6 +238,26 @@ void clockevents_config_and_register(struct clock_event_device *dev, clockevents_register_device(dev); } +/** + * clockevents_update_freq - Update frequency and reprogram a clock event device. + * @dev: device to modify + * @freq: new device frequency + * + * Reconfigure and reprogram a clock event device in oneshot + * mode. Must be called on the cpu for which the device delivers per + * cpu timer events with interrupts disabled! Returns 0 on success, + * -ETIME when the event is in the past. + */ +int clockevents_update_freq(struct clock_event_device *dev, u32 freq) +{ + clockevents_config(dev, freq); + + if (dev->mode != CLOCK_EVT_MODE_ONESHOT) + return 0; + + return clockevents_program_event(dev, dev->next_event, ktime_get()); +} + /* * Noop handler when we shut down an event device */ |