[linux-block.git] / kernel / irq / dummychip.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
 * Copyright (C) 2005-2006, Thomas Gleixner, Russell King
 *
 * This file contains the dummy interrupt chip implementation
 */
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/export.h>

#include "internals.h"

/*
 * What should we do if we get a hw irq event on an illegal vector?
 * Each architecture has to answer this themself.
 */
static void ack_bad(struct irq_data *data)
{
	struct irq_desc *desc = irq_data_to_desc(data);

	print_irq_desc(data->irq, desc);
	ack_bad_irq(data->irq);
}

/*
 * NOP functions
 */
static void noop(struct irq_data *data) { }

static unsigned int noop_ret(struct irq_data *data)
{
	return 0;
}

/*
 * Generic no controller implementation
 */
struct irq_chip no_irq_chip = {
	.name		= "none",
	.irq_startup	= noop_ret,
	.irq_shutdown	= noop,
	.irq_enable	= noop,
	.irq_disable	= noop,
	.irq_ack	= ack_bad,
	.flags		= IRQCHIP_SKIP_SET_WAKE,
};

/*
 * Generic dummy implementation which can be used for
 * real dumb interrupt sources
 */
struct irq_chip dummy_irq_chip = {
	.name		= "dummy",
	.irq_startup	= noop_ret,
	.irq_shutdown	= noop,
	.irq_enable	= noop,
	.irq_disable	= noop,
	.irq_ack	= noop,
	.irq_mask	= noop,
	.irq_unmask	= noop,
	.flags		= IRQCHIP_SKIP_SET_WAKE,
};
EXPORT_SYMBOL_GPL(dummy_irq_chip);
Commit	Line	Data
52a65ff5	1	// SPDX-License-Identifier: GPL-2.0
3795de23 TG	2	/*
	3	* Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
	4	* Copyright (C) 2005-2006, Thomas Gleixner, Russell King
	5	*
	6	* This file contains the dummy interrupt chip implementation
	7	*/
	8	#include <linux/interrupt.h>
	9	#include <linux/irq.h>
17d83127	10	#include <linux/export.h>
3795de23 TG	11
	12	#include "internals.h"
	13
	14	/*
	15	* What should we do if we get a hw irq event on an illegal vector?
	16	* Each architecture has to answer this themself.
	17	*/
	18	static void ack_bad(struct irq_data *data)
	19	{
	20	struct irq_desc *desc = irq_data_to_desc(data);
	21
	22	print_irq_desc(data->irq, desc);
	23	ack_bad_irq(data->irq);
	24	}
	25
	26	/*
	27	* NOP functions
	28	*/
	29	static void noop(struct irq_data *data) { }
	30
	31	static unsigned int noop_ret(struct irq_data *data)
	32	{
	33	return 0;
	34	}
	35
3795de23 TG	36	/*
	37	* Generic no controller implementation
	38	*/
	39	struct irq_chip no_irq_chip = {
	40	.name = "none",
	41	.irq_startup = noop_ret,
	42	.irq_shutdown = noop,
	43	.irq_enable = noop,
	44	.irq_disable = noop,
	45	.irq_ack = ack_bad,
de8d1810	46	.flags = IRQCHIP_SKIP_SET_WAKE,
3795de23 TG	47	};
	48
	49	/*
	50	* Generic dummy implementation which can be used for
	51	* real dumb interrupt sources
	52	*/
	53	struct irq_chip dummy_irq_chip = {
	54	.name = "dummy",
	55	.irq_startup = noop_ret,
	56	.irq_shutdown = noop,
	57	.irq_enable = noop,
	58	.irq_disable = noop,
	59	.irq_ack = noop,
	60	.irq_mask = noop,
	61	.irq_unmask = noop,
10a50f1a	62	.flags = IRQCHIP_SKIP_SET_WAKE,
3795de23	63	};
17d83127	64	EXPORT_SYMBOL_GPL(dummy_irq_chip);