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
  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
  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
  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);