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msm: timer: Use clockevents_config_and_register()

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Don't open code the min/max delta logic. Use the generic
version instead. Also expand the number of bits we can handle
because there isn't anything that says we can't handle all 32
bits.

Before:
 max_delta_ns:   122880426391799
 min_delta_ns:   122070
 mult:           140737
 shift:          32

After:
 max_delta_ns:   131071523464981
 min_delta_ns:   122069
 mult:           70369
 shift:          31

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: David Brown <davidb@codeaurora.org>
This commit is contained in:
Stephen Boyd 2011-11-08 10:34:10 -08:00 committed by David Brown
parent dde7d61e7f
commit 27fdb57743
1 changed files with 1 additions and 10 deletions
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11
arch/arm/mach-msm/timer.c
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@ -93,7 +93,6 @@ static void msm_timer_set_mode(enum clock_event_mode mode,
static struct clock_event_device msm_clockevent = {
.name = "gp_timer",
.features = CLOCK_EVT_FEAT_ONESHOT,
.shift = 32,
.rating = 200,
.set_next_event = msm_timer_set_next_event,
.set_mode = msm_timer_set_mode,
@ -161,18 +160,10 @@ static void __init msm_timer_init(void)
writel_relaxed(0, event_base + TIMER_ENABLE);
writel_relaxed(0, event_base + TIMER_CLEAR);
writel_relaxed(~0, event_base + TIMER_MATCH_VAL);
ce->mult = div_sc(GPT_HZ, NSEC_PER_SEC, ce->shift);
/*
* allow at least 10 seconds to notice that the timer
* wrapped
*/
ce->max_delta_ns = clockevent_delta2ns(0xf0000000, ce);
/* 4 gets rounded down to 3 */
ce->min_delta_ns = clockevent_delta2ns(4, ce);
ce->cpumask = cpumask_of(0);
ce->irq = INT_GP_TIMER_EXP;
clockevents_register_device(ce);
clockevents_config_and_register(ce, GPT_HZ, 4, 0xffffffff);
if (cpu_is_msm8x60() || cpu_is_msm8960()) {
msm_evt.percpu_evt = alloc_percpu(struct clock_event_device *);
if (!msm_evt.percpu_evt) {