diff options
Diffstat (limited to 'arch/arm/mach-msm/timer.c')
| -rw-r--r-- | arch/arm/mach-msm/timer.c | 69 |
1 files changed, 40 insertions, 29 deletions
diff --git a/arch/arm/mach-msm/timer.c b/arch/arm/mach-msm/timer.c index 63621f152c9..afeeca52fc6 100644 --- a/arch/arm/mach-msm/timer.c +++ b/arch/arm/mach-msm/timer.c @@ -71,12 +71,16 @@ enum timer_location { struct msm_clock { struct clock_event_device clockevent; struct clocksource clocksource; - struct irqaction irq; + unsigned int irq; void __iomem *regbase; uint32_t freq; uint32_t shift; void __iomem *global_counter; void __iomem *local_counter; + union { + struct clock_event_device *evt; + struct clock_event_device __percpu **percpu_evt; + }; }; enum { @@ -87,13 +91,10 @@ enum { static struct msm_clock msm_clocks[]; -static struct clock_event_device *local_clock_event; static irqreturn_t msm_timer_interrupt(int irq, void *dev_id) { - struct clock_event_device *evt = dev_id; - if (smp_processor_id() != 0) - evt = local_clock_event; + struct clock_event_device *evt = *(struct clock_event_device **)dev_id; if (evt->event_handler == NULL) return IRQ_HANDLED; evt->event_handler(evt); @@ -171,13 +172,7 @@ static struct msm_clock msm_clocks[] = { .mask = CLOCKSOURCE_MASK(32), .flags = CLOCK_SOURCE_IS_CONTINUOUS, }, - .irq = { - .name = "gp_timer", - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_TRIGGER_RISING, - .handler = msm_timer_interrupt, - .dev_id = &msm_clocks[0].clockevent, - .irq = INT_GP_TIMER_EXP - }, + .irq = INT_GP_TIMER_EXP, .freq = GPT_HZ, }, [MSM_CLOCK_DGT] = { @@ -196,13 +191,7 @@ static struct msm_clock msm_clocks[] = { .mask = CLOCKSOURCE_MASK((32 - MSM_DGT_SHIFT)), .flags = CLOCK_SOURCE_IS_CONTINUOUS, }, - .irq = { - .name = "dg_timer", - .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_TRIGGER_RISING, - .handler = msm_timer_interrupt, - .dev_id = &msm_clocks[1].clockevent, - .irq = INT_DEBUG_TIMER_EXP - }, + .irq = INT_DEBUG_TIMER_EXP, .freq = DGT_HZ >> MSM_DGT_SHIFT, .shift = MSM_DGT_SHIFT, } @@ -261,10 +250,30 @@ static void __init msm_timer_init(void) printk(KERN_ERR "msm_timer_init: clocksource_register " "failed for %s\n", cs->name); - res = setup_irq(clock->irq.irq, &clock->irq); + ce->irq = clock->irq; + if (cpu_is_msm8x60() || cpu_is_msm8960()) { + clock->percpu_evt = alloc_percpu(struct clock_event_device *); + if (!clock->percpu_evt) { + pr_err("msm_timer_init: memory allocation " + "failed for %s\n", ce->name); + continue; + } + + *__this_cpu_ptr(clock->percpu_evt) = ce; + res = request_percpu_irq(ce->irq, msm_timer_interrupt, + ce->name, clock->percpu_evt); + if (!res) + enable_percpu_irq(ce->irq, 0); + } else { + clock->evt = ce; + res = request_irq(ce->irq, msm_timer_interrupt, + IRQF_TIMER | IRQF_NOBALANCING | IRQF_TRIGGER_RISING, + ce->name, &clock->evt); + } + if (res) - printk(KERN_ERR "msm_timer_init: setup_irq " - "failed for %s\n", cs->name); + pr_err("msm_timer_init: request_irq failed for %s\n", + ce->name); clockevents_register_device(ce); } @@ -273,6 +282,7 @@ static void __init msm_timer_init(void) #ifdef CONFIG_SMP int __cpuinit local_timer_setup(struct clock_event_device *evt) { + static bool local_timer_inited; struct msm_clock *clock = &msm_clocks[MSM_GLOBAL_TIMER]; /* Use existing clock_event for cpu 0 */ @@ -281,12 +291,13 @@ int __cpuinit local_timer_setup(struct clock_event_device *evt) writel(DGT_CLK_CTL_DIV_4, MSM_TMR_BASE + DGT_CLK_CTL); - if (!local_clock_event) { + if (!local_timer_inited) { writel(0, clock->regbase + TIMER_ENABLE); writel(0, clock->regbase + TIMER_CLEAR); writel(~0, clock->regbase + TIMER_MATCH_VAL); + local_timer_inited = true; } - evt->irq = clock->irq.irq; + evt->irq = clock->irq; evt->name = "local_timer"; evt->features = CLOCK_EVT_FEAT_ONESHOT; evt->rating = clock->clockevent.rating; @@ -298,17 +309,17 @@ int __cpuinit local_timer_setup(struct clock_event_device *evt) clockevent_delta2ns(0xf0000000 >> clock->shift, evt); evt->min_delta_ns = clockevent_delta2ns(4, evt); - local_clock_event = evt; - - gic_enable_ppi(clock->irq.irq); + *__this_cpu_ptr(clock->percpu_evt) = evt; + enable_percpu_irq(evt->irq, 0); clockevents_register_device(evt); return 0; } -inline int local_timer_ack(void) +void local_timer_stop(struct clock_event_device *evt) { - return 1; + evt->set_mode(CLOCK_EVT_MODE_UNUSED, evt); + disable_percpu_irq(evt->irq); } #endif |