Hi Kurt, Kurt Kanzenbach <kurt@xxxxxxxxxxxxx> writes: > On Mon Aug 24 2020, Vinicius Costa Gomes wrote: >> Hi, >> >> Kurt Kanzenbach <kurt@xxxxxxxxxxxxx> writes: >> > [snip] >>> + /* Setup timer for schedule switch: The IP core only allows to set a >>> + * cycle start timer 8 seconds in the future. This is why we setup the >>> + * hritmer to base_time - 5 seconds. Then, we have enough time to >>> + * activate IP core's EST timer. >>> + */ >>> + start = ktime_sub_ns(schedule->base_time, (u64)5 * NSEC_PER_SEC); >>> + hrtimer_start_range_ns(&hellcreek_port->cycle_start_timer, start, >>> + NSEC_PER_SEC, HRTIMER_MODE_ABS); >> >> If we are talking about seconds here, I don't think you need to use a >> hrtimer, you could use a workqueue/delayed_work. Should make things a >> bit simpler. > > I've used hrtimers for one reason: The hrtimer provides a way to fire at > an absolute base time based on CLOCK_TAI. All the other facilities such > as workqueues, timer list timers, etc do not. Oh, yeah. Good point. Cheers, -- Vinicius
