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arm: pmu: allow platform specific irq enable/disable handling 

This patch introduces .enable_irq and .disable_irq into
struct arm_pmu_platdata, so platform specific irq enablement
can be handled after request_irq, and platform specific irq
disablement can be handled before free_irq.

This patch is for support of  pmu irq routed from CTI on omap4.

Acked-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Ming Lei 2011-03-02 15:00:08 +08:00 committed by Will Deacon
parent 14eec97ff4
commit e0516a64e7
2 changed files with 20 additions and 5 deletions
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15
arch/arm/include/asm/pmu.h
View File

@ -27,13 +27,22 @@ enum arm_pmu_type {
/*
* struct arm_pmu_platdata - ARM PMU platform data
*
* @handle_irq: an optional handler which will be called from the interrupt and
* passed the address of the low level handler, and can be used to implement
* any platform specific handling before or after calling it.
* @handle_irq: an optional handler which will be called from the
* interrupt and passed the address of the low level handler,
* and can be used to implement any platform specific handling
* before or after calling it.
* @enable_irq: an optional handler which will be called after
* request_irq and be used to handle some platform specific
* irq enablement
* @disable_irq: an optional handler which will be called before
* free_irq and be used to handle some platform specific
* irq disablement
*/
struct arm_pmu_platdata {
irqreturn_t (*handle_irq)(int irq, void *dev,
irq_handler_t pmu_handler);
void (*enable_irq)(int irq);
void (*disable_irq)(int irq);
};
#ifdef CONFIG_CPU_HAS_PMU

10
arch/arm/kernel/perf_event.c
View File

@ -380,6 +380,8 @@ armpmu_release_hardware(struct arm_pmu *armpmu)
{
int i, irq, irqs;
struct platform_device *pmu_device = armpmu->plat_device;
struct arm_pmu_platdata *plat =
dev_get_platdata(&pmu_device->dev);
irqs = min(pmu_device->num_resources, num_possible_cpus());
@ -387,8 +389,11 @@ armpmu_release_hardware(struct arm_pmu *armpmu)
if (!cpumask_test_and_clear_cpu(i, &armpmu->active_irqs))
continue;
irq = platform_get_irq(pmu_device, i);
if (irq >= 0)
if (irq >= 0) {
if (plat && plat->disable_irq)
plat->disable_irq(irq);
free_irq(irq, armpmu);
}
}
release_pmu(armpmu->type);
@ -448,7 +453,8 @@ armpmu_reserve_hardware(struct arm_pmu *armpmu)
irq);
armpmu_release_hardware(armpmu);
return err;
}
} else if (plat && plat->enable_irq)
plat->enable_irq(irq);
cpumask_set_cpu(i, &armpmu->active_irqs);
}