Blame view
drivers/misc/dummy-irq.c
1.36 KB
d2912cb15 treewide: Replace... |
1 |
// SPDX-License-Identifier: GPL-2.0-only |
54f69b92f dummy-irq: introd... |
2 3 4 5 6 7 8 9 10 11 12 |
/* * Dummy IRQ handler driver. * * This module only registers itself as a handler that is specified to it * by the 'irq' parameter. * * The sole purpose of this module is to help with debugging of systems on * which spurious IRQs would happen on disabled IRQ vector. * * Copyright (C) 2013 Jiri Kosina */ |
54f69b92f dummy-irq: introd... |
13 14 15 |
#include <linux/module.h> #include <linux/irq.h> #include <linux/interrupt.h> |
a7b594b49 dummy-irq: requir... |
16 |
static int irq = -1; |
54f69b92f dummy-irq: introd... |
17 18 19 20 21 22 |
static irqreturn_t dummy_interrupt(int irq, void *dev_id) { static int count = 0; if (count == 0) { |
8b513d0cf treewide: Fix typ... |
23 24 |
printk(KERN_INFO "dummy-irq: interrupt occurred on IRQ %d ", |
54f69b92f dummy-irq: introd... |
25 26 27 28 29 30 31 32 33 |
irq); count++; } return IRQ_NONE; } static int __init dummy_irq_init(void) { |
a7b594b49 dummy-irq: requir... |
34 35 36 37 38 |
if (irq < 0) { printk(KERN_ERR "dummy-irq: no IRQ given. Use irq=N "); return -EIO; } |
54f69b92f dummy-irq: introd... |
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 |
if (request_irq(irq, &dummy_interrupt, IRQF_SHARED, "dummy_irq", &irq)) { printk(KERN_ERR "dummy-irq: cannot register IRQ %d ", irq); return -EIO; } printk(KERN_INFO "dummy-irq: registered for IRQ %d ", irq); return 0; } static void __exit dummy_irq_exit(void) { printk(KERN_INFO "dummy-irq unloaded "); free_irq(irq, &irq); } module_init(dummy_irq_init); module_exit(dummy_irq_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Jiri Kosina"); |
4f1927dcb Annotate hardware... |
61 |
module_param_hw(irq, uint, irq, 0444); |
54f69b92f dummy-irq: introd... |
62 |
MODULE_PARM_DESC(irq, "The IRQ to register for"); |
da86920f4 Add MODULE_DESCRI... |
63 |
MODULE_DESCRIPTION("Dummy IRQ handler driver"); |