2 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or (at
7 * your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/acpi.h>
25 #include <linux/types.h>
26 #include <linux/proc_fs.h>
27 #include <linux/seq_file.h>
28 #include <acpi/acpi_bus.h>
29 #include <acpi/acpi_drivers.h>
31 #define PREFIX "ACPI: "
33 ACPI_MODULE_NAME("cm_sbs");
34 #define ACPI_AC_CLASS "ac_adapter"
35 #define ACPI_BATTERY_CLASS "battery"
36 #define _COMPONENT ACPI_SBS_COMPONENT
37 static struct proc_dir_entry
*acpi_ac_dir
;
38 static struct proc_dir_entry
*acpi_battery_dir
;
40 static DEFINE_MUTEX(cm_sbs_mutex
);
42 static int lock_ac_dir_cnt
;
43 static int lock_battery_dir_cnt
;
45 struct proc_dir_entry
*acpi_lock_ac_dir(void)
47 mutex_lock(&cm_sbs_mutex
);
49 acpi_ac_dir
= proc_mkdir(ACPI_AC_CLASS
, acpi_root_dir
);
53 printk(KERN_ERR PREFIX
54 "Cannot create %s\n", ACPI_AC_CLASS
);
56 mutex_unlock(&cm_sbs_mutex
);
59 EXPORT_SYMBOL(acpi_lock_ac_dir
);
61 void acpi_unlock_ac_dir(struct proc_dir_entry
*acpi_ac_dir_param
)
63 mutex_lock(&cm_sbs_mutex
);
64 if (acpi_ac_dir_param
)
66 if (lock_ac_dir_cnt
== 0 && acpi_ac_dir_param
&& acpi_ac_dir
) {
67 remove_proc_entry(ACPI_AC_CLASS
, acpi_root_dir
);
70 mutex_unlock(&cm_sbs_mutex
);
72 EXPORT_SYMBOL(acpi_unlock_ac_dir
);
74 struct proc_dir_entry
*acpi_lock_battery_dir(void)
76 mutex_lock(&cm_sbs_mutex
);
77 if (!acpi_battery_dir
) {
79 proc_mkdir(ACPI_BATTERY_CLASS
, acpi_root_dir
);
81 if (acpi_battery_dir
) {
82 lock_battery_dir_cnt
++;
84 printk(KERN_ERR PREFIX
85 "Cannot create %s\n", ACPI_BATTERY_CLASS
);
87 mutex_unlock(&cm_sbs_mutex
);
88 return acpi_battery_dir
;
90 EXPORT_SYMBOL(acpi_lock_battery_dir
);
92 void acpi_unlock_battery_dir(struct proc_dir_entry
*acpi_battery_dir_param
)
94 mutex_lock(&cm_sbs_mutex
);
95 if (acpi_battery_dir_param
)
96 lock_battery_dir_cnt
--;
97 if (lock_battery_dir_cnt
== 0 && acpi_battery_dir_param
98 && acpi_battery_dir
) {
99 remove_proc_entry(ACPI_BATTERY_CLASS
, acpi_root_dir
);
100 acpi_battery_dir
= NULL
;
102 mutex_unlock(&cm_sbs_mutex
);
105 EXPORT_SYMBOL(acpi_unlock_battery_dir
);
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