virq-debugfs.c

 1/*
 2 * Support for virtual IRQ subgroups debugfs mapping.
 3 *
 4 * Copyright (C) 2010  Paul Mundt
 5 *
 6 * Modelled after arch/powerpc/kernel/irq.c.
 7 *
 8 * This file is subject to the terms and conditions of the GNU General Public
 9 * License.  See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/seq_file.h>
13#include <linux/fs.h>
14#include <linux/init.h>
15#include <linux/irq.h>
16#include <linux/debugfs.h>
17#include "internals.h"
18
19static int intc_irq_xlate_show(struct seq_file *m, void *priv)
20{
21	const unsigned int nr_irqs = irq_get_nr_irqs();
22	int i;
23
24	seq_printf(m, "%-5s  %-7s  %-15s\n", "irq", "enum", "chip name");
25
26	for (i = 1; i < nr_irqs; i++) {
27		struct intc_map_entry *entry = intc_irq_xlate_get(i);
28		struct intc_desc_int *desc = entry->desc;
29
30		if (!desc)
31			continue;
32
33		seq_printf(m, "%5d  ", i);
34		seq_printf(m, "0x%05x  ", entry->enum_id);
35		seq_printf(m, "%-15s\n", desc->chip.name);
36	}
37
38	return 0;
39}
40
41DEFINE_SHOW_ATTRIBUTE(intc_irq_xlate);
42
43static int __init intc_irq_xlate_init(void)
44{
45	/*
46	 * XXX.. use arch_debugfs_dir here when all of the intc users are
47	 * converted.
48	 */
49	if (debugfs_create_file("intc_irq_xlate", S_IRUGO, NULL, NULL,
50				&intc_irq_xlate_fops) == NULL)
51		return -ENOMEM;
52
53	return 0;
54}
55fs_initcall(intc_irq_xlate_init);