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ARM: architected timers: add support for UP timer

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If CONFIG_LOCAL_TIMERS is not defined, let the architected timer
driver register a single clock_event_device that is used as a
global timer.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2012-01-20 10:47:00 +00:00
parent 0075242b3a
commit 273d16adbc
1 changed files with 13 additions and 0 deletions
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13
arch/arm/kernel/arch_timer.c
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@ -246,6 +246,8 @@ static struct local_timer_ops arch_timer_ops __cpuinitdata = {
.stop = arch_timer_stop,
};
static struct clock_event_device arch_timer_global_evt;
static int __init arch_timer_common_register(void)
{
int err;
@ -280,6 +282,17 @@ static int __init arch_timer_common_register(void)
}
err = local_timer_register(&arch_timer_ops);
if (err) {
/*
* We couldn't register as a local timer (could be
* because we're on a UP platform, or because some
* other local timer is already present...). Try as a
* global timer instead.
*/
arch_timer_global_evt.cpumask = cpumask_of(0);
err = arch_timer_setup(&arch_timer_global_evt);
}
if (err)
goto out_free_irq;