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>

1 files changed, 8 insertions, 2 deletions

diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index c475379199b1..daa1db84452e 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -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);
         }