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ARM: PRIMA2: Divorce timer-marco from local timer API

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Separate the marco local timers from the local timer API. This
will allow us to remove ARM local timer support in the near future
and gets us closer to moving this driver to drivers/clocksource.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Barry Song <baohua.song@csr.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Stephen Boyd 2013-02-15 17:02:16 -08:00
parent ee98d27df6
commit 05a6548556
1 changed files with 52 additions and 44 deletions
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96
drivers/clocksource/timer-marco.c
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@ -10,6 +10,7 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/clockchips.h> #include <linux/clockchips.h>
#include <linux/clocksource.h> #include <linux/clocksource.h>
#include <linux/cpu.h>
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/clk.h> #include <linux/clk.h>
@ -18,7 +19,6 @@
#include <linux/of_irq.h> #include <linux/of_irq.h>
#include <linux/of_address.h> #include <linux/of_address.h>
#include <linux/sched_clock.h> #include <linux/sched_clock.h>
#include <asm/localtimer.h>
#include <asm/mach/time.h> #include <asm/mach/time.h>
#define SIRFSOC_TIMER_32COUNTER_0_CTRL 0x0000 #define SIRFSOC_TIMER_32COUNTER_0_CTRL 0x0000
@ -151,13 +151,7 @@ static void sirfsoc_clocksource_resume(struct clocksource *cs)
BIT(1) | BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL); BIT(1) | BIT(0), sirfsoc_timer_base + SIRFSOC_TIMER_64COUNTER_CTRL);
} }
static struct clock_event_device sirfsoc_clockevent = { static struct clock_event_device __percpu *sirfsoc_clockevent;
.name = "sirfsoc_clockevent",
.rating = 200,
.features = CLOCK_EVT_FEAT_ONESHOT,
.set_mode = sirfsoc_timer_set_mode,
.set_next_event = sirfsoc_timer_set_next_event,
};
static struct clocksource sirfsoc_clocksource = { static struct clocksource sirfsoc_clocksource = {
.name = "sirfsoc_clocksource", .name = "sirfsoc_clocksource",
@ -173,11 +167,8 @@ static struct irqaction sirfsoc_timer_irq = {
.name = "sirfsoc_timer0", .name = "sirfsoc_timer0",
.flags = IRQF_TIMER | IRQF_NOBALANCING, .flags = IRQF_TIMER | IRQF_NOBALANCING,
.handler = sirfsoc_timer_interrupt, .handler = sirfsoc_timer_interrupt,
.dev_id = &sirfsoc_clockevent,
}; };
#ifdef CONFIG_LOCAL_TIMERS
static struct irqaction sirfsoc_timer1_irq = { static struct irqaction sirfsoc_timer1_irq = {
.name = "sirfsoc_timer1", .name = "sirfsoc_timer1",
.flags = IRQF_TIMER | IRQF_NOBALANCING, .flags = IRQF_TIMER | IRQF_NOBALANCING,
@ -186,56 +177,77 @@ static struct irqaction sirfsoc_timer1_irq = {
static int __cpuinit sirfsoc_local_timer_setup(struct clock_event_device *ce) static int __cpuinit sirfsoc_local_timer_setup(struct clock_event_device *ce)
{ {
/* Use existing clock_event for cpu 0 */ int cpu = smp_processor_id();
if (!smp_processor_id()) struct irqaction *action;
return 0;
ce->irq = sirfsoc_timer1_irq.irq; if (cpu == 0)
action = &sirfsoc_timer_irq;
else
action = &sirfsoc_timer1_irq;
ce->irq = action->irq;
ce->name = "local_timer"; ce->name = "local_timer";
ce->features = sirfsoc_clockevent.features; ce->features = CLOCK_EVT_FEAT_ONESHOT;
ce->rating = sirfsoc_clockevent.rating; ce->rating = 200;
ce->set_mode = sirfsoc_timer_set_mode; ce->set_mode = sirfsoc_timer_set_mode;
ce->set_next_event = sirfsoc_timer_set_next_event; ce->set_next_event = sirfsoc_timer_set_next_event;
ce->shift = sirfsoc_clockevent.shift; clockevents_calc_mult_shift(ce, CLOCK_TICK_RATE, 60);
ce->mult = sirfsoc_clockevent.mult; ce->max_delta_ns = clockevent_delta2ns(-2, ce);
ce->max_delta_ns = sirfsoc_clockevent.max_delta_ns; ce->min_delta_ns = clockevent_delta2ns(2, ce);
ce->min_delta_ns = sirfsoc_clockevent.min_delta_ns; ce->cpumask = cpumask_of(cpu);
sirfsoc_timer1_irq.dev_id = ce; action->dev_id = ce;
BUG_ON(setup_irq(ce->irq, &sirfsoc_timer1_irq)); BUG_ON(setup_irq(ce->irq, action));
irq_set_affinity(sirfsoc_timer1_irq.irq, cpumask_of(1)); irq_set_affinity(action->irq, cpumask_of(cpu));
clockevents_register_device(ce); clockevents_register_device(ce);
return 0; return 0;
} }
static void sirfsoc_local_timer_stop(struct clock_event_device *ce) static void __cpuinit sirfsoc_local_timer_stop(struct clock_event_device *ce)
{ {
int cpu = smp_processor_id();
sirfsoc_timer_count_disable(1); sirfsoc_timer_count_disable(1);
remove_irq(sirfsoc_timer1_irq.irq, &sirfsoc_timer1_irq); if (cpu == 0)
remove_irq(sirfsoc_timer_irq.irq, &sirfsoc_timer_irq);
else
remove_irq(sirfsoc_timer1_irq.irq, &sirfsoc_timer1_irq);
} }
static struct local_timer_ops sirfsoc_local_timer_ops __cpuinitdata = { static int __cpuinit sirfsoc_cpu_notify(struct notifier_block *self,
.setup = sirfsoc_local_timer_setup, unsigned long action, void *hcpu)
.stop = sirfsoc_local_timer_stop, {
/*
* Grab cpu pointer in each case to avoid spurious
* preemptible warnings
*/
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_STARTING:
sirfsoc_local_timer_setup(this_cpu_ptr(sirfsoc_clockevent));
break;
case CPU_DYING:
sirfsoc_local_timer_stop(this_cpu_ptr(sirfsoc_clockevent));
break;
}
return NOTIFY_OK;
}
static struct notifier_block sirfsoc_cpu_nb __cpuinitdata = {
.notifier_call = sirfsoc_cpu_notify,
}; };
#endif /* CONFIG_LOCAL_TIMERS */
static void __init sirfsoc_clockevent_init(void) static void __init sirfsoc_clockevent_init(void)
{ {
clockevents_calc_mult_shift(&sirfsoc_clockevent, CLOCK_TICK_RATE, 60); sirfsoc_clockevent = alloc_percpu(struct clock_event_device);
BUG_ON(!sirfsoc_clockevent);
sirfsoc_clockevent.max_delta_ns = BUG_ON(register_cpu_notifier(&sirfsoc_cpu_nb));
clockevent_delta2ns(-2, &sirfsoc_clockevent);
sirfsoc_clockevent.min_delta_ns =
clockevent_delta2ns(2, &sirfsoc_clockevent);
sirfsoc_clockevent.cpumask = cpumask_of(0); /* Immediately configure the timer on the boot CPU */
clockevents_register_device(&sirfsoc_clockevent); sirfsoc_local_timer_setup(this_cpu_ptr(sirfsoc_clockevent));
#ifdef CONFIG_LOCAL_TIMERS
local_timer_register(&sirfsoc_local_timer_ops);
#endif
} }
/* initialize the kernel jiffy timer source */ /* initialize the kernel jiffy timer source */
@ -273,8 +285,6 @@ static void __init sirfsoc_marco_timer_init(void)
BUG_ON(clocksource_register_hz(&sirfsoc_clocksource, CLOCK_TICK_RATE)); BUG_ON(clocksource_register_hz(&sirfsoc_clocksource, CLOCK_TICK_RATE));
BUG_ON(setup_irq(sirfsoc_timer_irq.irq, &sirfsoc_timer_irq));
sirfsoc_clockevent_init(); sirfsoc_clockevent_init();
} }
@ -288,11 +298,9 @@ static void __init sirfsoc_of_timer_init(struct device_node *np)
if (!sirfsoc_timer_irq.irq) if (!sirfsoc_timer_irq.irq)
panic("No irq passed for timer0 via DT\n"); panic("No irq passed for timer0 via DT\n");
#ifdef CONFIG_LOCAL_TIMERS
sirfsoc_timer1_irq.irq = irq_of_parse_and_map(np, 1); sirfsoc_timer1_irq.irq = irq_of_parse_and_map(np, 1);
if (!sirfsoc_timer1_irq.irq) if (!sirfsoc_timer1_irq.irq)
panic("No irq passed for timer1 via DT\n"); panic("No irq passed for timer1 via DT\n");
#endif
sirfsoc_marco_timer_init(); sirfsoc_marco_timer_init();
} }