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irq/generic-chip: Provide devm_irq_setup_generic_chip()

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Provide a resource managed variant of irq_setup_generic_chip().

Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-doc@vger.kernel.org
Cc: Jonathan Corbet <corbet@lwn.net>
Link: http://lkml.kernel.org/r/1496246820-13250-6-git-send-email-brgl@bgdev.pl
This commit is contained in:
Bartosz Golaszewski 2017-05-31 18:07:00 +02:00 committed by Thomas Gleixner
parent 1c3e36309f
commit 30fd8fc5c9
3 changed files with 56 additions and 0 deletions
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1
Documentation/driver-model/devres.txt
View File

@ -312,6 +312,7 @@ IRQ
devm_irq_alloc_desc_from()
devm_irq_alloc_descs_from()
devm_irq_alloc_generic_chip()
devm_irq_setup_generic_chip()
LED
devm_led_classdev_register()

3
include/linux/irq.h
View File

@ -962,6 +962,9 @@ struct irq_chip_generic *
devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct,
unsigned int irq_base, void __iomem *reg_base,
irq_flow_handler_t handler);
int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc,
u32 msk, enum irq_gc_flags flags,
unsigned int clr, unsigned int set);
struct irq_chip_generic *irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq);

52
kernel/irq/devres.c
View File

@ -231,4 +231,56 @@ devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct,
return gc;
}
EXPORT_SYMBOL_GPL(devm_irq_alloc_generic_chip);
struct irq_generic_chip_devres {
struct irq_chip_generic *gc;
u32 msk;
unsigned int clr;
unsigned int set;
};
static void devm_irq_remove_generic_chip(struct device *dev, void *res)
{
struct irq_generic_chip_devres *this = res;
irq_remove_generic_chip(this->gc, this->msk, this->clr, this->set);
}
/**
* devm_irq_setup_generic_chip - Setup a range of interrupts with a generic
* chip for a managed device
*
* @dev: Device to setup the generic chip for
* @gc: Generic irq chip holding all data
* @msk: Bitmask holding the irqs to initialize relative to gc->irq_base
* @flags: Flags for initialization
* @clr: IRQ_* bits to clear
* @set: IRQ_* bits to set
*
* Set up max. 32 interrupts starting from gc->irq_base. Note, this
* initializes all interrupts to the primary irq_chip_type and its
* associated handler.
*/
int devm_irq_setup_generic_chip(struct device *dev, struct irq_chip_generic *gc,
u32 msk, enum irq_gc_flags flags,
unsigned int clr, unsigned int set)
{
struct irq_generic_chip_devres *dr;
dr = devres_alloc(devm_irq_remove_generic_chip,
sizeof(*dr), GFP_KERNEL);
if (!dr)
return -ENOMEM;
irq_setup_generic_chip(gc, msk, flags, clr, set);
dr->gc = gc;
dr->msk = msk;
dr->clr = clr;
dr->set = set;
devres_add(dev, dr);
return 0;
}
EXPORT_SYMBOL_GPL(devm_irq_setup_generic_chip);
#endif /* CONFIG_GENERIC_IRQ_CHIP */