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Commit 3d06770e authored by Mark Rutland's avatar Mark Rutland
Browse files

arm: Add generic timer broadcast support 



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: default avatarMark Rutland <mark.rutland@arm.com>
Reviewed-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Tested-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent e2c50119

arch/arm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ config ARM 
	select ARCH_BINFMT_ELF_RANDOMIZE_PIE

	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE

	select ARCH_HAVE_CUSTOM_GPIO_H

	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST

	select ARCH_WANT_IPC_PARSE_VERSION

	select BUILDTIME_EXTABLE_SORT if MMU

	select CPU_PM if (SUSPEND || CPU_IDLE)

arch/arm/kernel/smp.c

+1 −2
Original line number Diff line number Diff line
@@ -476,7 +476,7 @@ u64 smp_irq_stat_cpu(unsigned int cpu) 
static DEFINE_PER_CPU(struct clock_event_device, percpu_clockevent);



#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);

}
@@ -524,7 +524,6 @@ static void __cpuinit percpu_timer_setup(void) 
	struct clock_event_device *evt = &per_cpu(percpu_clockevent, cpu);



	evt->cpumask = cpumask_of(cpu);

	evt->broadcast = smp_timer_broadcast;



	if (!lt_ops || lt_ops->setup(evt))

		broadcast_timer_setup(evt);