target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_debugfs.c

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  Based on Atheros' AG7100 driver
   8  *
   9  *  This program is free software; you can redistribute it and/or modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  */
  13
  14 #include <linux/debugfs.h>
  15
  16 #include "ag71xx.h"
  17
  18 static struct dentry *ag71xx_debugfs_root;
  19
  20 int ag71xx_debugfs_root_init(void)
  21 {
  22         if (ag71xx_debugfs_root)
  23                 return -EBUSY;
  24
  25         ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
  26         if (!ag71xx_debugfs_root)
  27                 return -ENOENT;
  28
  29         return 0;
  30 }
  31
  32 void ag71xx_debugfs_root_exit(void)
  33 {
  34         debugfs_remove(ag71xx_debugfs_root);
  35         ag71xx_debugfs_root = NULL;
  36 }
  37
  38 void ag71xx_debugfs_exit(struct ag71xx *ag)
  39 {
  40         debugfs_remove(ag->debug.debugfs_dir);
  41 }
  42
  43 int ag71xx_debugfs_init(struct ag71xx *ag)
  44 {
  45         ag->debug.debugfs_dir = debugfs_create_dir(ag->dev->name,
  46                                                    ag71xx_debugfs_root);
  47         if (!ag->debug.debugfs_dir)
  48                 goto err;
  49
  50         return 0;
  51
  52  err:
  53         ag71xx_debugfs_exit(ag);
  54         return -ENOMEM;
  55 }