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| // 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 | IRQCHIP_PIPELINE_SAFE,
| };
|
| /*
| * 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 | IRQCHIP_PIPELINE_SAFE,
| };
| EXPORT_SYMBOL_GPL(dummy_irq_chip);
|
|
