From 547733c58dc3d2a50af762d4fdaf1d552e6b31cd Mon Sep 17 00:00:00 2001 From: Nicolai Stange Date: Thu, 30 Mar 2017 22:10:21 +0200 Subject: [PATCH] clockevents/drivers/atlas7: 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 timer-atlas7 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 Cc: Thomas Gleixner Cc: Daniel Lezcano Cc: Richard Cochran Cc: Prarit Bhargava Cc: Stephen Boyd Cc: Barry Song Cc: linux-arm-kernel@lists.infradead.org Acked-by: Daniel Lezcano Signed-off-by: Nicolai Stange Signed-off-by: John Stultz --- drivers/clocksource/timer-atlas7.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clocksource/timer-atlas7.c b/drivers/clocksource/timer-atlas7.c index 3d8a181f0252..50300eec4a39 100644 --- a/drivers/clocksource/timer-atlas7.c +++ b/drivers/clocksource/timer-atlas7.c @@ -192,7 +192,9 @@ static int sirfsoc_local_timer_starting_cpu(unsigned int cpu) ce->set_next_event = sirfsoc_timer_set_next_event; clockevents_calc_mult_shift(ce, atlas7_timer_rate, 60); ce->max_delta_ns = clockevent_delta2ns(-2, ce); + ce->max_delta_ticks = (unsigned long)-2; ce->min_delta_ns = clockevent_delta2ns(2, ce); + ce->min_delta_ticks = 2; ce->cpumask = cpumask_of(cpu); action->dev_id = ce;