LXR linux/drivers/sh/intc/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_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
  40static 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
  45static 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
  52static 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}
  64fs_initcall(intc_irq_xlate_init);
  65