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Commit 30fd8fc5 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski Committed by Thomas Gleixner
Browse files

irq/generic-chip: Provide devm_irq_setup_generic_chip() 



Provide a resource managed variant of irq_setup_generic_chip().

Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Acked-by: default avatarMarc 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
parent 1c3e3630

Documentation/driver-model/devres.txt

+1 −0
Original line number Diff line number Diff line
@@ -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()

include/linux/irq.h

+3 −0
Original line number Diff line number Diff line
@@ -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);

kernel/irq/devres.c

+52 −0
Original line number Diff line number Diff line
@@ -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 */