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authorNicolai Stange <nicstange@gmail.com>2017-03-30 22:47:32 +0300
committerJohn Stultz <john.stultz@linaro.org>2017-04-14 23:11:16 +0300
commite4db9253d6b4c1d927254f1c4bef875573229502 (patch)
treec594e4984dacec3c7c7725ad20e5a4fb94a171b3 /arch/mips/sgi-ip27
parent547733c58dc3d2a50af762d4fdaf1d552e6b31cd (diff)
downloadlinux-e4db9253d6b4c1d927254f1c4bef875573229502.tar.xz
MIPS: clockevent drivers: 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 MIPS arch's clockevent drivers 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 these drivers. 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> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Keguang Zhang <keguang.zhang@gmail.com> Cc: John Crispin <john@phrozen.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'arch/mips/sgi-ip27')
-rw-r--r--arch/mips/sgi-ip27/ip27-timer.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c
index 695c51bdd7dc..a53f0c8c901e 100644
--- a/arch/mips/sgi-ip27/ip27-timer.c
+++ b/arch/mips/sgi-ip27/ip27-timer.c
@@ -113,7 +113,9 @@ void hub_rt_clock_event_init(void)
cd->features = CLOCK_EVT_FEAT_ONESHOT;
clockevent_set_clock(cd, CYCLES_PER_SEC);
cd->max_delta_ns = clockevent_delta2ns(0xfffffffffffff, cd);
+ cd->max_delta_ticks = 0xfffffffffffff;
cd->min_delta_ns = clockevent_delta2ns(0x300, cd);
+ cd->min_delta_ticks = 0x300;
cd->rating = 200;
cd->irq = irq;
cd->cpumask = cpumask_of(cpu);