From 7d0946693794c6a5e91b7d597eba50efbd10fdac Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Fri, 20 Jan 2012 10:47:00 +0000 Subject: ARM: architected timers: add support for UP timer 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 --- arch/arm/kernel/arch_timer.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'arch') diff --git a/arch/arm/kernel/arch_timer.c b/arch/arm/kernel/arch_timer.c index e2c1f86cd69a..8062805deb4e 100644 --- a/arch/arm/kernel/arch_timer.c +++ b/arch/arm/kernel/arch_timer.c @@ -245,6 +245,8 @@ 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; @@ -279,6 +281,17 @@ 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; -- cgit v1.2.3