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: 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>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 67874b8..65ae737 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -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)

diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 9308519..b7e3b50 100644 (file)
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -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);