2 * Dummy IRQ handler driver.
4 * This module only registers itself as a handler that is specified to it
5 * by the 'irq' parameter.
7 * The sole purpose of this module is to help with debugging of systems on
8 * which spurious IRQs would happen on disabled IRQ vector.
10 * Copyright (C) 2013 Jiri Kosina
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License version 2 as published by
16 * the Free Software Foundation.
18 #include <linux/module.h>
19 #include <linux/irq.h>
20 #include <linux/interrupt.h>
24 static irqreturn_t dummy_interrupt(int irq, void *dev_id)
29 printk(KERN_INFO "dummy-irq: interrupt occured on IRQ %d\n",
37 static int __init dummy_irq_init(void)
39 if (request_irq(irq, &dummy_interrupt, IRQF_SHARED, "dummy_irq", &irq)) {
40 printk(KERN_ERR "dummy-irq: cannot register IRQ %d\n", irq);
43 printk(KERN_INFO "dummy-irq: registered for IRQ %d\n", irq);
47 static void __exit dummy_irq_exit(void)
49 printk(KERN_INFO "dummy-irq unloaded\n");
53 module_init(dummy_irq_init);
54 module_exit(dummy_irq_exit);
56 MODULE_LICENSE("GPL");
57 MODULE_AUTHOR("Jiri Kosina");
58 module_param(irq, uint, 0444);
59 MODULE_PARM_DESC(irq, "The IRQ to register for");