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
intc_irq_xlate_debug(struct seq_file * m,void * priv)19 static int intc_irq_xlate_debug(struct seq_file *m, void *priv)
20 {
21 int i;
22
23 seq_printf(m, "%-5s %-7s %-15s\n", "irq", "enum", "chip name");
24
25 for (i = 1; i < nr_irqs; i++) {
26 struct intc_map_entry *entry = intc_irq_xlate_get(i);
27 struct intc_desc_int *desc = entry->desc;
28
29 if (!desc)
30 continue;
31
32 seq_printf(m, "%5d ", i);
33 seq_printf(m, "0x%05x ", entry->enum_id);
34 seq_printf(m, "%-15s\n", desc->chip.name);
35 }
36
37 return 0;
38 }
39
intc_irq_xlate_open(struct inode * inode,struct file * file)40 static int intc_irq_xlate_open(struct inode *inode, struct file *file)
41 {
42 return single_open(file, intc_irq_xlate_debug, inode->i_private);
43 }
44
45 static const struct file_operations intc_irq_xlate_fops = {
46 .open = intc_irq_xlate_open,
47 .read = seq_read,
48 .llseek = seq_lseek,
49 .release = single_release,
50 };
51
intc_irq_xlate_init(void)52 static int __init intc_irq_xlate_init(void)
53 {
54 /*
55 * XXX.. use arch_debugfs_dir here when all of the intc users are
56 * converted.
57 */
58 if (debugfs_create_file("intc_irq_xlate", S_IRUGO, NULL, NULL,
59 &intc_irq_xlate_fops) == NULL)
60 return -ENOMEM;
61
62 return 0;
63 }
64 fs_initcall(intc_irq_xlate_init);
65