diff options
author | Jon Hunter <jonathanh@nvidia.com> | 2016-06-07 16:12:29 +0100 |
---|---|---|
committer | Marc Zyngier <marc.zyngier@arm.com> | 2016-06-13 11:53:51 +0100 |
commit | be45beb2df6909d42a6b3b0052601b3eef878fc0 (patch) | |
tree | ec2e157704e95b7d78cffc5be6026b6f7f022a7d /kernel/irq/manage.c | |
parent | 1e2a7d78499ec8859d2b469051b7b80bad3b08aa (diff) | |
download | linux-be45beb2df6909d42a6b3b0052601b3eef878fc0.tar.bz2 |
genirq: Add runtime power management support for IRQ chips
Some IRQ chips may be located in a power domain outside of the CPU
subsystem and hence will require device specific runtime power
management. In order to support such IRQ chips, add a pointer for a
device structure to the irq_chip structure, and if this pointer is
populated by the IRQ chip driver and CONFIG_PM is selected in the kernel
configuration, then the pm_runtime_get/put APIs for this chip will be
called when an IRQ is requested/freed, respectively.
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'kernel/irq/manage.c')
-rw-r--r-- | kernel/irq/manage.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index f78b0846afb1..00cfc852cca8 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -1416,10 +1416,18 @@ int setup_irq(unsigned int irq, struct irqaction *act) if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc))) return -EINVAL; + + retval = irq_chip_pm_get(&desc->irq_data); + if (retval < 0) + return retval; + chip_bus_lock(desc); retval = __setup_irq(irq, desc, act); chip_bus_sync_unlock(desc); + if (retval) + irq_chip_pm_put(&desc->irq_data); + return retval; } EXPORT_SYMBOL_GPL(setup_irq); @@ -1513,6 +1521,7 @@ static struct irqaction *__free_irq(unsigned int irq, void *dev_id) } } + irq_chip_pm_put(&desc->irq_data); module_put(desc->owner); kfree(action->secondary); return action; @@ -1655,11 +1664,16 @@ int request_threaded_irq(unsigned int irq, irq_handler_t handler, action->name = devname; action->dev_id = dev_id; + retval = irq_chip_pm_get(&desc->irq_data); + if (retval < 0) + return retval; + chip_bus_lock(desc); retval = __setup_irq(irq, desc, action); chip_bus_sync_unlock(desc); if (retval) { + irq_chip_pm_put(&desc->irq_data); kfree(action->secondary); kfree(action); } @@ -1836,6 +1850,7 @@ static struct irqaction *__free_percpu_irq(unsigned int irq, void __percpu *dev_ unregister_handler_proc(irq, action); + irq_chip_pm_put(&desc->irq_data); module_put(desc->owner); return action; @@ -1898,10 +1913,18 @@ int setup_percpu_irq(unsigned int irq, struct irqaction *act) if (!desc || !irq_settings_is_per_cpu_devid(desc)) return -EINVAL; + + retval = irq_chip_pm_get(&desc->irq_data); + if (retval < 0) + return retval; + chip_bus_lock(desc); retval = __setup_irq(irq, desc, act); chip_bus_sync_unlock(desc); + if (retval) + irq_chip_pm_put(&desc->irq_data); + return retval; } @@ -1945,12 +1968,18 @@ int request_percpu_irq(unsigned int irq, irq_handler_t handler, action->name = devname; action->percpu_dev_id = dev_id; + retval = irq_chip_pm_get(&desc->irq_data); + if (retval < 0) + return retval; + chip_bus_lock(desc); retval = __setup_irq(irq, desc, action); chip_bus_sync_unlock(desc); - if (retval) + if (retval) { + irq_chip_pm_put(&desc->irq_data); kfree(action); + } return retval; } |