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Diffstat (limited to 'arch/arc/kernel/time.c')
-rw-r--r--arch/arc/kernel/time.c48
1 files changed, 18 insertions, 30 deletions
diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index 98f22d2eb563..f927b8dc6edd 100644
--- a/arch/arc/kernel/time.c
+++ b/arch/arc/kernel/time.c
@@ -296,30 +296,23 @@ static irqreturn_t timer_irq_handler(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int arc_timer_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
+
+static int arc_timer_starting_cpu(unsigned int cpu)
{
struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
evt->cpumask = cpumask_of(smp_processor_id());
- switch (action & ~CPU_TASKS_FROZEN) {
- case CPU_STARTING:
- clockevents_config_and_register(evt, arc_timer_freq,
- 0, ULONG_MAX);
- enable_percpu_irq(arc_timer_irq, 0);
- break;
- case CPU_DYING:
- disable_percpu_irq(arc_timer_irq);
- break;
- }
-
- return NOTIFY_OK;
+ clockevents_config_and_register(evt, arc_timer_freq, 0, ARC_TIMER_MAX);
+ enable_percpu_irq(arc_timer_irq, 0);
+ return 0;
}
-static struct notifier_block arc_timer_cpu_nb = {
- .notifier_call = arc_timer_cpu_notify,
-};
+static int arc_timer_dying_cpu(unsigned int cpu)
+{
+ disable_percpu_irq(arc_timer_irq);
+ return 0;
+}
/*
* clockevent setup for boot CPU
@@ -329,12 +322,6 @@ static int __init arc_clockevent_setup(struct device_node *node)
struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
int ret;
- ret = register_cpu_notifier(&arc_timer_cpu_nb);
- if (ret) {
- pr_err("Failed to register cpu notifier");
- return ret;
- }
-
arc_timer_irq = irq_of_parse_and_map(node, 0);
if (arc_timer_irq <= 0) {
pr_err("clockevent: missing irq");
@@ -347,11 +334,6 @@ static int __init arc_clockevent_setup(struct device_node *node)
return ret;
}
- evt->irq = arc_timer_irq;
- evt->cpumask = cpumask_of(smp_processor_id());
- clockevents_config_and_register(evt, arc_timer_freq,
- 0, ARC_TIMER_MAX);
-
/* Needs apriori irq_set_percpu_devid() done in intc map function */
ret = request_percpu_irq(arc_timer_irq, timer_irq_handler,
"Timer0 (per-cpu-tick)", evt);
@@ -360,8 +342,14 @@ static int __init arc_clockevent_setup(struct device_node *node)
return ret;
}
- enable_percpu_irq(arc_timer_irq, 0);
-
+ ret = cpuhp_setup_state(CPUHP_AP_ARC_TIMER_STARTING,
+ "AP_ARC_TIMER_STARTING",
+ arc_timer_starting_cpu,
+ arc_timer_dying_cpu);
+ if (ret) {
+ pr_err("Failed to setup hotplug state");
+ return ret;
+ }
return 0;
}