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authorNicolai Stange <nicstange@gmail.com>2017-03-30 21:44:31 +0200
committerJohn Stultz <john.stultz@linaro.org>2017-04-14 13:11:10 -0700
commit33ae7a9b6c23cdffe7449ddf1a992117262b939b (patch)
treeed17539db689ed22b45f4f9fdcc3927f95477355 /arch/m68k/coldfire
parent3d18d661aaad5a22f4d37a0592acc9d784f2a11b (diff)
m68k/coldfire/pit: 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 m68k arch's coldfire 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> Cc: Greg Ungerer <gerg@linux-m68k.org> CC: Geert Uytterhoeven <geert@linux-m68k.org> Cc: linux-m68k@lists.linux-m68k.org Acked-by: Greg Ungerer <gerg@linux-m68k.org> Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'arch/m68k/coldfire')
-rw-r--r--arch/m68k/coldfire/pit.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/m68k/coldfire/pit.c b/arch/m68k/coldfire/pit.c
index 175553d5b8ed..6c0878018b44 100644
--- a/arch/m68k/coldfire/pit.c
+++ b/arch/m68k/coldfire/pit.c
@@ -149,8 +149,10 @@ void hw_timer_init(irq_handler_t handler)
cf_pit_clockevent.mult = div_sc(FREQ, NSEC_PER_SEC, 32);
cf_pit_clockevent.max_delta_ns =
clockevent_delta2ns(0xFFFF, &cf_pit_clockevent);
+ cf_pit_clockevent.max_delta_ticks = 0xFFFF;
cf_pit_clockevent.min_delta_ns =
clockevent_delta2ns(0x3f, &cf_pit_clockevent);
+ cf_pit_clockevent.min_delta_ticks = 0x3f;
clockevents_register_device(&cf_pit_clockevent);
setup_irq(MCF_IRQ_PIT1, &pit_irq);