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Commit 44e72c7e authored by Bartosz Golaszewski's avatar Bartosz Golaszewski Committed by Thomas Gleixner
Browse files

genirq/irq_sim: Add a devres variant of irq_sim_init() 



Add a resource managed version of irq_sim_init(). This can be
conveniently used in device drivers.

Signed-off-by: default avatarBartosz Golaszewski <brgl@bgdev.pl>
Acked-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-doc@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
Cc: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Cc: Jonathan Cameron <jic23@kernel.org>
Link: http://lkml.kernel.org/r/20170814145318.6495-3-brgl@bgdev.pl


Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent b19af510

Documentation/driver-model/devres.txt

+1 −0
Original line number Diff line number Diff line
@@ -312,6 +312,7 @@ IRQ 
  devm_irq_alloc_descs_from()

  devm_irq_alloc_generic_chip()

  devm_irq_setup_generic_chip()

  devm_irq_sim_init()



LED

  devm_led_classdev_register()

include/linux/irq_sim.h

+3 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
 */



#include <linux/irq_work.h>

#include <linux/device.h>



/*

 * Provides a framework for allocating simulated interrupts which can be
@@ -34,6 +35,8 @@ struct irq_sim { 
};



int irq_sim_init(struct irq_sim *sim, unsigned int num_irqs);

int devm_irq_sim_init(struct device *dev, struct irq_sim *sim,

		      unsigned int num_irqs);

void irq_sim_fini(struct irq_sim *sim);

void irq_sim_fire(struct irq_sim *sim, unsigned int offset);

int irq_sim_irqnum(struct irq_sim *sim, unsigned int offset);

kernel/irq/irq_sim.c

+43 −0
Original line number Diff line number Diff line
@@ -10,6 +10,10 @@ 
#include <linux/irq_sim.h>

#include <linux/irq.h>



struct irq_sim_devres {

	struct irq_sim		*sim;

};



static void irq_sim_irqmask(struct irq_data *data)

{

	struct irq_sim_irq_ctx *irq_ctx = irq_data_get_irq_chip_data(data);
@@ -92,6 +96,45 @@ void irq_sim_fini(struct irq_sim *sim) 
}

EXPORT_SYMBOL_GPL(irq_sim_fini);



static void devm_irq_sim_release(struct device *dev, void *res)

{

	struct irq_sim_devres *this = res;



	irq_sim_fini(this->sim);

}



/**

 * irq_sim_init - Initialize the interrupt simulator for a managed device.

 *

 * @dev:        Device to initialize the simulator object for.

 * @sim:        The interrupt simulator object to initialize.

 * @num_irqs:   Number of interrupts to allocate

 *

 * Returns 0 on success and a negative error number on failure.

 */

int devm_irq_sim_init(struct device *dev, struct irq_sim *sim,

		      unsigned int num_irqs)

{

	struct irq_sim_devres *dr;

	int rv;



	dr = devres_alloc(devm_irq_sim_release, sizeof(*dr), GFP_KERNEL);

	if (!dr)

		return -ENOMEM;



	rv = irq_sim_init(sim, num_irqs);

	if (rv) {

		devres_free(dr);

		return rv;

	}



	dr->sim = sim;

	devres_add(dev, dr);



	return 0;

}

EXPORT_SYMBOL_GPL(devm_irq_sim_init);



/**

 * irq_sim_fire - Enqueue an interrupt.

 *