diff options
| author | Nicolai Stange <nicstange@gmail.com> | 2017-03-30 22:07:49 +0200 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2017-04-14 13:11:13 -0700 |
| commit | 8317b53fbe32439c56ba83ad4435b641799b2ce8 (patch) | |
| tree | ecba7e9ee6bebd2ef55d5fd4d697e1c0348d98b4 /drivers/clocksource | |
| parent | a60a9fb8fb52768bd19cd8c0893f4c0432acb10e (diff) | |
| download | linux-8317b53fbe32439c56ba83ad4435b641799b2ce8.tar.gz | |
clockevents/drivers/dw_apb: Set ->min_delta_ticks and ->max_delta_ticks
In preparation for making the clockevents core NTP correction aware, all clockevent device drivers must set ->min_delta_ticks and ->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a clockevent device's rate is going to change dynamically and thus, the ratio of ns to ticks ceases to stay invariant. Make the dw_apb clockevent driver initialize these fields properly. This patch alone doesn't introduce any change in functionality as the clockevents core still looks exclusively at the (untouched) ->min_delta_ns and ->max_delta_ns. As soon as this has changed, a followup patch will purge the initialization of ->min_delta_ns and ->max_delta_ns from this driver. Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/dw_apb_timer.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/clocksource/dw_apb_timer.c b/drivers/clocksource/dw_apb_timer.c index 63e4f5519577..880f37e8278f 100644 --- a/drivers/clocksource/dw_apb_timer.c +++ b/drivers/clocksource/dw_apb_timer.c @@ -257,7 +257,9 @@ dw_apb_clockevent_init(int cpu, const char *name, unsigned rating, clockevents_calc_mult_shift(&dw_ced->ced, freq, APBT_MIN_PERIOD); dw_ced->ced.max_delta_ns = clockevent_delta2ns(0x7fffffff, &dw_ced->ced); + dw_ced->ced.max_delta_ticks = 0x7fffffff; dw_ced->ced.min_delta_ns = clockevent_delta2ns(5000, &dw_ced->ced); + dw_ced->ced.min_delta_ticks = 5000; dw_ced->ced.cpumask = cpumask_of(cpu); dw_ced->ced.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_DYNIRQ; |