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Commit 1c3e3630 authored by Bartosz Golaszewski's avatar Bartosz Golaszewski Committed by Thomas Gleixner
Browse files

irq/generic-chip: Provide devm_irq_alloc_generic_chip() 



Provide a resource managed variant of irq_alloc_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/1496246820-13250-5-git-send-email-brgl@bgdev.pl
parent f1602039

Documentation/driver-model/devres.txt

+1 −0
Original line number Diff line number Diff line
@@ -311,6 +311,7 @@ IRQ 
  devm_irq_alloc_desc_at()

  devm_irq_alloc_desc_from()

  devm_irq_alloc_descs_from()

  devm_irq_alloc_generic_chip()



LED

  devm_led_classdev_register()

include/linux/irq.h

+5 −0
Original line number Diff line number Diff line
@@ -958,6 +958,11 @@ int irq_setup_alt_chip(struct irq_data *d, unsigned int type); 
void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk,

			     unsigned int clr, unsigned int set);



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);



struct irq_chip_generic *irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq);



int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,

kernel/irq/devres.c

+34 −0
Original line number Diff line number Diff line
@@ -4,6 +4,8 @@ 
#include <linux/gfp.h>

#include <linux/irq.h>



#include "internals.h"



/*

 * Device resource management aware IRQ request/free implementation.

 */
@@ -198,3 +200,35 @@ int __devm_irq_alloc_descs(struct device *dev, int irq, unsigned int from, 
	return base;

}

EXPORT_SYMBOL_GPL(__devm_irq_alloc_descs);



#ifdef CONFIG_GENERIC_IRQ_CHIP

/**

 * devm_irq_alloc_generic_chip - Allocate and initialize a generic chip

 *                               for a managed device

 * @dev:	Device to allocate the generic chip for

 * @name:	Name of the irq chip

 * @num_ct:	Number of irq_chip_type instances associated with this

 * @irq_base:	Interrupt base nr for this chip

 * @reg_base:	Register base address (virtual)

 * @handler:	Default flow handler associated with this chip

 *

 * Returns an initialized irq_chip_generic structure. The chip defaults

 * to the primary (index 0) irq_chip_type and @handler

 */

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)

{

	struct irq_chip_generic *gc;

	unsigned long sz = sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);



	gc = devm_kzalloc(dev, sz, GFP_KERNEL);

	if (gc)

		irq_init_generic_chip(gc, name, num_ct,

				      irq_base, reg_base, handler);



	return gc;

}

EXPORT_SYMBOL_GPL(devm_irq_alloc_generic_chip);

#endif /* CONFIG_GENERIC_IRQ_CHIP */