blob: 36b0e61f9c0949d479ae4be7fc3454933956b28c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
3 *
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or (at
12 * your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 *
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24 */
25
26#include <linux/kernel.h>
27#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090028#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/init.h>
30#include <linux/types.h>
Lan Tianyu0ab5bb62013-05-08 07:28:46 +000031#include <linux/dmi.h>
32#include <linux/delay.h>
Lan Tianyue63f6e22014-07-07 01:13:46 +020033#ifdef CONFIG_ACPI_PROCFS_POWER
34#include <linux/proc_fs.h>
35#include <linux/seq_file.h>
36#endif
Zhang Ruicc8ef522013-09-25 20:39:45 +080037#include <linux/platform_device.h>
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040038#include <linux/power_supply.h>
Lv Zheng8b484632013-12-03 08:49:16 +080039#include <linux/acpi.h>
Alexander Mezin4eee4f02014-03-12 00:58:48 +070040#include "battery.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Len Browna192a952009-07-28 16:45:54 -040042#define PREFIX "ACPI: "
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#define ACPI_AC_CLASS "ac_adapter"
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#define ACPI_AC_DEVICE_NAME "AC Adapter"
46#define ACPI_AC_FILE_STATE "state"
47#define ACPI_AC_NOTIFY_STATUS 0x80
48#define ACPI_AC_STATUS_OFFLINE 0x00
49#define ACPI_AC_STATUS_ONLINE 0x01
50#define ACPI_AC_STATUS_UNKNOWN 0xFF
51
52#define _COMPONENT ACPI_AC_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050053ACPI_MODULE_NAME("ac");
Linus Torvalds1da177e2005-04-16 15:20:36 -070054
Len Brownf52fd662007-02-12 22:42:12 -050055MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050056MODULE_DESCRIPTION("ACPI AC Adapter Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070057MODULE_LICENSE("GPL");
58
Lan Tianyue63f6e22014-07-07 01:13:46 +020059
Guenter Roeck98012842014-05-06 19:18:28 -070060static int acpi_ac_add(struct acpi_device *device);
61static int acpi_ac_remove(struct acpi_device *device);
62static void acpi_ac_notify(struct acpi_device *device, u32 event);
63
64static const struct acpi_device_id ac_device_ids[] = {
65 {"ACPI0003", 0},
66 {"", 0},
67};
68MODULE_DEVICE_TABLE(acpi, ac_device_ids);
69
70#ifdef CONFIG_PM_SLEEP
71static int acpi_ac_resume(struct device *dev);
72#endif
73static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
74
Lan Tianyue63f6e22014-07-07 01:13:46 +020075#ifdef CONFIG_ACPI_PROCFS_POWER
76extern struct proc_dir_entry *acpi_lock_ac_dir(void);
77extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
78static int acpi_ac_open_fs(struct inode *inode, struct file *file);
79#endif
80
81
Lan Tianyu0ab5bb62013-05-08 07:28:46 +000082static int ac_sleep_before_get_state_ms;
83
Guenter Roeck98012842014-05-06 19:18:28 -070084static struct acpi_driver acpi_ac_driver = {
85 .name = "ac",
86 .class = ACPI_AC_CLASS,
87 .ids = ac_device_ids,
88 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
89 .ops = {
90 .add = acpi_ac_add,
91 .remove = acpi_ac_remove,
92 .notify = acpi_ac_notify,
93 },
94 .drv.pm = &acpi_ac_pm,
95};
96
Linus Torvalds1da177e2005-04-16 15:20:36 -070097struct acpi_ac {
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040098 struct power_supply charger;
Guenter Roeck98012842014-05-06 19:18:28 -070099 struct acpi_device * device;
Matthew Wilcox27663c52008-10-10 02:22:59 -0400100 unsigned long long state;
Alexander Mezin4eee4f02014-03-12 00:58:48 +0700101 struct notifier_block battery_nb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102};
103
Phil Carmody497888c2011-07-14 15:07:13 +0300104#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400105
Lan Tianyue63f6e22014-07-07 01:13:46 +0200106#ifdef CONFIG_ACPI_PROCFS_POWER
107static const struct file_operations acpi_ac_fops = {
108 .owner = THIS_MODULE,
109 .open = acpi_ac_open_fs,
110 .read = seq_read,
111 .llseek = seq_lseek,
112 .release = single_release,
113};
114#endif
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116/* --------------------------------------------------------------------------
117 AC Adapter Management
118 -------------------------------------------------------------------------- */
119
Len Brown4be44fc2005-08-05 00:44:28 -0400120static int acpi_ac_get_state(struct acpi_ac *ac)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121{
Guenter Roeck98012842014-05-06 19:18:28 -0700122 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
Guenter Roeck98012842014-05-06 19:18:28 -0700124 if (!ac)
125 return -EINVAL;
126
127 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
Zhang Ruicc8ef522013-09-25 20:39:45 +0800128 &ac->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 if (ACPI_FAILURE(status)) {
Zhang Ruicc8ef522013-09-25 20:39:45 +0800130 ACPI_EXCEPTION((AE_INFO, status,
131 "Error reading AC Adapter state"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 ac->state = ACPI_AC_STATUS_UNKNOWN;
Patrick Mocheld550d982006-06-27 00:41:40 -0400133 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 }
Len Brown4be44fc2005-08-05 00:44:28 -0400135
Patrick Mocheld550d982006-06-27 00:41:40 -0400136 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137}
138
Zhang Rui3151dbb2010-12-08 10:40:45 +0800139/* --------------------------------------------------------------------------
140 sysfs I/F
141 -------------------------------------------------------------------------- */
142static int get_ac_property(struct power_supply *psy,
143 enum power_supply_property psp,
144 union power_supply_propval *val)
145{
146 struct acpi_ac *ac = to_acpi_ac(psy);
147
148 if (!ac)
149 return -ENODEV;
150
151 if (acpi_ac_get_state(ac))
152 return -ENODEV;
153
154 switch (psp) {
155 case POWER_SUPPLY_PROP_ONLINE:
156 val->intval = ac->state;
157 break;
158 default:
159 return -EINVAL;
160 }
161 return 0;
162}
163
164static enum power_supply_property ac_props[] = {
165 POWER_SUPPLY_PROP_ONLINE,
166};
167
Lan Tianyue63f6e22014-07-07 01:13:46 +0200168#ifdef CONFIG_ACPI_PROCFS_POWER
169/* --------------------------------------------------------------------------
170 FS Interface (/proc)
171 -------------------------------------------------------------------------- */
172
173static struct proc_dir_entry *acpi_ac_dir;
174
175static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
176{
177 struct acpi_ac *ac = seq->private;
178
179
180 if (!ac)
181 return 0;
182
183 if (acpi_ac_get_state(ac)) {
184 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
185 return 0;
186 }
187
188 seq_puts(seq, "state: ");
189 switch (ac->state) {
190 case ACPI_AC_STATUS_OFFLINE:
191 seq_puts(seq, "off-line\n");
192 break;
193 case ACPI_AC_STATUS_ONLINE:
194 seq_puts(seq, "on-line\n");
195 break;
196 default:
197 seq_puts(seq, "unknown\n");
198 break;
199 }
200
201 return 0;
202}
203
204static int acpi_ac_open_fs(struct inode *inode, struct file *file)
205{
206 return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
207}
208
209static int acpi_ac_add_fs(struct acpi_ac *ac)
210{
211 struct proc_dir_entry *entry = NULL;
212
213 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
214 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
215 if (!acpi_device_dir(ac->device)) {
216 acpi_device_dir(ac->device) =
217 proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
218 if (!acpi_device_dir(ac->device))
219 return -ENODEV;
220 }
221
222 /* 'state' [R] */
223 entry = proc_create_data(ACPI_AC_FILE_STATE,
224 S_IRUGO, acpi_device_dir(ac->device),
225 &acpi_ac_fops, ac);
226 if (!entry)
227 return -ENODEV;
228 return 0;
229}
230
231static int acpi_ac_remove_fs(struct acpi_ac *ac)
232{
233
234 if (acpi_device_dir(ac->device)) {
235 remove_proc_entry(ACPI_AC_FILE_STATE,
236 acpi_device_dir(ac->device));
237 remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
238 acpi_device_dir(ac->device) = NULL;
239 }
240
241 return 0;
242}
243#endif
244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245/* --------------------------------------------------------------------------
246 Driver Model
247 -------------------------------------------------------------------------- */
248
Guenter Roeck98012842014-05-06 19:18:28 -0700249static void acpi_ac_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250{
Guenter Roeck98012842014-05-06 19:18:28 -0700251 struct acpi_ac *ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252
253 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400254 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 switch (event) {
Len Brownf163ff52008-06-14 01:26:37 -0400257 default:
258 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
259 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 case ACPI_AC_NOTIFY_STATUS:
Christian Lupien03d78252004-08-19 01:26:00 -0400261 case ACPI_NOTIFY_BUS_CHECK:
262 case ACPI_NOTIFY_DEVICE_CHECK:
Lan Tianyu0ab5bb62013-05-08 07:28:46 +0000263 /*
264 * A buggy BIOS may notify AC first and then sleep for
265 * a specific time before doing actual operations in the
266 * EC event handler (_Qxx). This will cause the AC state
267 * reported by the ACPI event to be incorrect, so wait for a
268 * specific time for the EC event handler to make progress.
269 */
270 if (ac_sleep_before_get_state_ms > 0)
271 msleep(ac_sleep_before_get_state_ms);
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 acpi_ac_get_state(ac);
Guenter Roeck98012842014-05-06 19:18:28 -0700274 acpi_bus_generate_netlink_event(device->pnp.device_class,
275 dev_name(&device->dev), event,
276 (u32) ac->state);
277 acpi_notifier_call_chain(device, event, (u32) ac->state);
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400278 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 }
280
Patrick Mocheld550d982006-06-27 00:41:40 -0400281 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282}
283
Alexander Mezin4eee4f02014-03-12 00:58:48 +0700284static int acpi_ac_battery_notify(struct notifier_block *nb,
285 unsigned long action, void *data)
286{
287 struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
288 struct acpi_bus_event *event = (struct acpi_bus_event *)data;
289
290 /*
291 * On HP Pavilion dv6-6179er AC status notifications aren't triggered
292 * when adapter is plugged/unplugged. However, battery status
293 * notifcations are triggered when battery starts charging or
294 * discharging. Re-reading AC status triggers lost AC notifications,
295 * if AC status has changed.
296 */
297 if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
298 event->type == ACPI_BATTERY_NOTIFY_STATUS)
299 acpi_ac_get_state(ac);
300
301 return NOTIFY_OK;
302}
303
Lan Tianyu0ab5bb62013-05-08 07:28:46 +0000304static int thinkpad_e530_quirk(const struct dmi_system_id *d)
305{
306 ac_sleep_before_get_state_ms = 1000;
307 return 0;
308}
309
310static struct dmi_system_id ac_dmi_table[] = {
311 {
312 .callback = thinkpad_e530_quirk,
313 .ident = "thinkpad e530",
314 .matches = {
315 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
316 DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
317 },
318 },
319 {},
320};
321
Guenter Roeck98012842014-05-06 19:18:28 -0700322static int acpi_ac_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323{
Len Brown4be44fc2005-08-05 00:44:28 -0400324 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400325 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
Guenter Roeck98012842014-05-06 19:18:28 -0700327
328 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400329 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Burman Yan36bcbec2006-12-19 12:56:11 -0800331 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400333 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Guenter Roeck98012842014-05-06 19:18:28 -0700335 ac->device = device;
336 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
337 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
338 device->driver_data = ac;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340 result = acpi_ac_get_state(ac);
341 if (result)
342 goto end;
343
Guenter Roeck98012842014-05-06 19:18:28 -0700344 ac->charger.name = acpi_device_bid(device);
Lan Tianyue63f6e22014-07-07 01:13:46 +0200345#ifdef CONFIG_ACPI_PROCFS_POWER
346 result = acpi_ac_add_fs(ac);
347 if (result)
348 goto end;
349#endif
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400350 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
351 ac->charger.properties = ac_props;
352 ac->charger.num_properties = ARRAY_SIZE(ac_props);
353 ac->charger.get_property = get_ac_property;
Guenter Roeck98012842014-05-06 19:18:28 -0700354 result = power_supply_register(&ac->device->dev, &ac->charger);
Lan Tianyuf197ac12012-07-20 13:29:16 +0800355 if (result)
356 goto end;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
Len Brown4be44fc2005-08-05 00:44:28 -0400358 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
Guenter Roeck98012842014-05-06 19:18:28 -0700359 acpi_device_name(device), acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400360 ac->state ? "on-line" : "off-line");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Alexander Mezin4eee4f02014-03-12 00:58:48 +0700362 ac->battery_nb.notifier_call = acpi_ac_battery_notify;
363 register_acpi_notifier(&ac->battery_nb);
Lan Tianyuab0fd672013-10-12 21:04:48 +0800364end:
Lan Tianyue63f6e22014-07-07 01:13:46 +0200365 if (result) {
366#ifdef CONFIG_ACPI_PROCFS_POWER
367 acpi_ac_remove_fs(ac);
368#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 kfree(ac);
Lan Tianyue63f6e22014-07-07 01:13:46 +0200370 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Lan Tianyu0ab5bb62013-05-08 07:28:46 +0000372 dmi_check_system(ac_dmi_table);
Patrick Mocheld550d982006-06-27 00:41:40 -0400373 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374}
375
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200376#ifdef CONFIG_PM_SLEEP
Rafael J. Wysockiccda7062012-06-27 23:26:35 +0200377static int acpi_ac_resume(struct device *dev)
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800378{
379 struct acpi_ac *ac;
380 unsigned old_state;
Rafael J. Wysockiccda7062012-06-27 23:26:35 +0200381
382 if (!dev)
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800383 return -EINVAL;
Rafael J. Wysockiccda7062012-06-27 23:26:35 +0200384
Guenter Roeck98012842014-05-06 19:18:28 -0700385 ac = acpi_driver_data(to_acpi_device(dev));
Rafael J. Wysockiccda7062012-06-27 23:26:35 +0200386 if (!ac)
387 return -EINVAL;
388
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800389 old_state = ac->state;
390 if (acpi_ac_get_state(ac))
391 return 0;
392 if (old_state != ac->state)
393 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
394 return 0;
395}
Shuah Khan06521c22014-02-12 20:19:05 -0700396#else
397#define acpi_ac_resume NULL
Rafael J. Wysocki90692402012-08-09 23:00:02 +0200398#endif
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800399
Guenter Roeck98012842014-05-06 19:18:28 -0700400static int acpi_ac_remove(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401{
Guenter Roeck98012842014-05-06 19:18:28 -0700402 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
Guenter Roeck98012842014-05-06 19:18:28 -0700404
405 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400406 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407
Guenter Roeck98012842014-05-06 19:18:28 -0700408 ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400410 if (ac->charger.dev)
411 power_supply_unregister(&ac->charger);
Alexander Mezin4eee4f02014-03-12 00:58:48 +0700412 unregister_acpi_notifier(&ac->battery_nb);
Zhang Ruicc8ef522013-09-25 20:39:45 +0800413
Lan Tianyue63f6e22014-07-07 01:13:46 +0200414#ifdef CONFIG_ACPI_PROCFS_POWER
415 acpi_ac_remove_fs(ac);
416#endif
417
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 kfree(ac);
419
Patrick Mocheld550d982006-06-27 00:41:40 -0400420 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421}
422
Len Brown4be44fc2005-08-05 00:44:28 -0400423static int __init acpi_ac_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424{
Rich Townsend3f86b832006-07-01 11:36:54 -0400425 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Pavel Machek4d8316d2006-08-14 22:37:22 -0700427 if (acpi_disabled)
428 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
Lan Tianyue63f6e22014-07-07 01:13:46 +0200430#ifdef CONFIG_ACPI_PROCFS_POWER
431 acpi_ac_dir = acpi_lock_ac_dir();
432 if (!acpi_ac_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400433 return -ENODEV;
Lan Tianyue63f6e22014-07-07 01:13:46 +0200434#endif
435
436
437 result = acpi_bus_register_driver(&acpi_ac_driver);
438 if (result < 0) {
439#ifdef CONFIG_ACPI_PROCFS_POWER
440 acpi_unlock_ac_dir(acpi_ac_dir);
441#endif
442 return -ENODEV;
443 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Patrick Mocheld550d982006-06-27 00:41:40 -0400445 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446}
447
Len Brown4be44fc2005-08-05 00:44:28 -0400448static void __exit acpi_ac_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
Guenter Roeck98012842014-05-06 19:18:28 -0700450 acpi_bus_unregister_driver(&acpi_ac_driver);
Lan Tianyue63f6e22014-07-07 01:13:46 +0200451#ifdef CONFIG_ACPI_PROCFS_POWER
452 acpi_unlock_ac_dir(acpi_ac_dir);
453#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455module_init(acpi_ac_init);
456module_exit(acpi_ac_exit);