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arm: Add generic timer broadcast support

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Implement timer_broadcast for the arm architecture, allowing for the use
of clock_event_device_drivers decoupled from the timer tick broadcast
mechanism.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Mark Rutland 2012-10-30 12:13:42 +00:00
parent e2c501190c
commit 3d06770eef
2 changed files with 2 additions and 2 deletions
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1
arch/arm/Kconfig
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@ -4,6 +4,7 @@ config ARM
select ARCH_BINFMT_ELF_RANDOMIZE_PIE select ARCH_BINFMT_ELF_RANDOMIZE_PIE
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select ARCH_HAVE_CUSTOM_GPIO_H select ARCH_HAVE_CUSTOM_GPIO_H
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_WANT_IPC_PARSE_VERSION select ARCH_WANT_IPC_PARSE_VERSION
select BUILDTIME_EXTABLE_SORT if MMU select BUILDTIME_EXTABLE_SORT if MMU
select CPU_PM if (SUSPEND || CPU_IDLE) select CPU_PM if (SUSPEND || CPU_IDLE)

3
arch/arm/kernel/smp.c
View File

@ -476,7 +476,7 @@ u64 smp_irq_stat_cpu(unsigned int cpu)
static DEFINE_PER_CPU(struct clock_event_device, percpu_clockevent); static DEFINE_PER_CPU(struct clock_event_device, percpu_clockevent);
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
static void smp_timer_broadcast(const struct cpumask *mask) void tick_broadcast(const struct cpumask *mask)
{ {
smp_cross_call(mask, IPI_TIMER); smp_cross_call(mask, IPI_TIMER);
} }
@ -524,7 +524,6 @@ static void __cpuinit percpu_timer_setup(void)
struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu); struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);
evt->cpumask = cpumask_of(cpu); evt->cpumask = cpumask_of(cpu);
evt->broadcast = smp_timer_broadcast;
if (!lt_ops || lt_ops->setup(evt)) if (!lt_ops || lt_ops->setup(evt))
broadcast_timer_setup(evt); broadcast_timer_setup(evt);