blob: 88e42abf5d881b8bf443ecc4f58e3b4e76b3ecd3 [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>
28#include <linux/init.h>
29#include <linux/types.h>
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030030#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/proc_fs.h>
32#include <linux/seq_file.h>
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -080033#endif
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050034#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040035#include <linux/power_supply.h>
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050036#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#include <acpi/acpi_bus.h>
38#include <acpi/acpi_drivers.h>
39
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#define ACPI_AC_CLASS "ac_adapter"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#define ACPI_AC_DEVICE_NAME "AC Adapter"
42#define ACPI_AC_FILE_STATE "state"
43#define ACPI_AC_NOTIFY_STATUS 0x80
44#define ACPI_AC_STATUS_OFFLINE 0x00
45#define ACPI_AC_STATUS_ONLINE 0x01
46#define ACPI_AC_STATUS_UNKNOWN 0xFF
47
48#define _COMPONENT ACPI_AC_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050049ACPI_MODULE_NAME("ac");
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Len Brownf52fd662007-02-12 22:42:12 -050051MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050052MODULE_DESCRIPTION("ACPI AC Adapter Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070053MODULE_LICENSE("GPL");
54
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030055#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -040056extern struct proc_dir_entry *acpi_lock_ac_dir(void);
57extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -080058static int acpi_ac_open_fs(struct inode *inode, struct file *file);
59#endif
Rich Townsend3f86b832006-07-01 11:36:54 -040060
Len Brown4be44fc2005-08-05 00:44:28 -040061static int acpi_ac_add(struct acpi_device *device);
62static int acpi_ac_remove(struct acpi_device *device, int type);
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -080063static int acpi_ac_resume(struct acpi_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
Tobias Klauserb299c222008-04-21 22:24:53 +000065static const struct acpi_device_id ac_device_ids[] = {
Thomas Renninger1ba90e32007-07-23 14:44:41 +020066 {"ACPI0003", 0},
67 {"", 0},
68};
69MODULE_DEVICE_TABLE(acpi, ac_device_ids);
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071static struct acpi_driver acpi_ac_driver = {
Len Brownc2b6705b2007-02-12 23:33:40 -050072 .name = "ac",
Len Brown4be44fc2005-08-05 00:44:28 -040073 .class = ACPI_AC_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +020074 .ids = ac_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -040075 .ops = {
76 .add = acpi_ac_add,
77 .remove = acpi_ac_remove,
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -080078 .resume = acpi_ac_resume,
Len Brown4be44fc2005-08-05 00:44:28 -040079 },
Linus Torvalds1da177e2005-04-16 15:20:36 -070080};
81
82struct acpi_ac {
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050083#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040084 struct power_supply charger;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050085#endif
Patrick Mochelaf961792006-05-19 16:54:32 -040086 struct acpi_device * device;
Matthew Wilcox27663c52008-10-10 02:22:59 -040087 unsigned long long state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088};
89
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040090#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
91
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030092#ifdef CONFIG_ACPI_PROCFS_POWER
Arjan van de Vend7508032006-07-04 13:06:00 -040093static const struct file_operations acpi_ac_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -070094 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -040095 .open = acpi_ac_open_fs,
96 .read = seq_read,
97 .llseek = seq_lseek,
98 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -070099};
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800100#endif
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500101#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400102static int get_ac_property(struct power_supply *psy,
103 enum power_supply_property psp,
104 union power_supply_propval *val)
105{
106 struct acpi_ac *ac = to_acpi_ac(psy);
107 switch (psp) {
108 case POWER_SUPPLY_PROP_ONLINE:
109 val->intval = ac->state;
110 break;
111 default:
112 return -EINVAL;
113 }
114 return 0;
115}
116
117static enum power_supply_property ac_props[] = {
118 POWER_SUPPLY_PROP_ONLINE,
119};
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500120#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121/* --------------------------------------------------------------------------
122 AC Adapter Management
123 -------------------------------------------------------------------------- */
124
Len Brown4be44fc2005-08-05 00:44:28 -0400125static int acpi_ac_get_state(struct acpi_ac *ac)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126{
Len Brown4be44fc2005-08-05 00:44:28 -0400127 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
130 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400131 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400133 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400135 ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 ac->state = ACPI_AC_STATUS_UNKNOWN;
Patrick Mocheld550d982006-06-27 00:41:40 -0400137 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 }
Len Brown4be44fc2005-08-05 00:44:28 -0400139
Patrick Mocheld550d982006-06-27 00:41:40 -0400140 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141}
142
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300143#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144/* --------------------------------------------------------------------------
145 FS Interface (/proc)
146 -------------------------------------------------------------------------- */
147
Len Brown4be44fc2005-08-05 00:44:28 -0400148static struct proc_dir_entry *acpi_ac_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
150static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
151{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200152 struct acpi_ac *ac = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400156 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158 if (acpi_ac_get_state(ac)) {
159 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400160 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 }
162
163 seq_puts(seq, "state: ");
164 switch (ac->state) {
165 case ACPI_AC_STATUS_OFFLINE:
166 seq_puts(seq, "off-line\n");
167 break;
168 case ACPI_AC_STATUS_ONLINE:
169 seq_puts(seq, "on-line\n");
170 break;
171 default:
172 seq_puts(seq, "unknown\n");
173 break;
174 }
175
Patrick Mocheld550d982006-06-27 00:41:40 -0400176 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177}
Len Brown4be44fc2005-08-05 00:44:28 -0400178
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179static int acpi_ac_open_fs(struct inode *inode, struct file *file)
180{
181 return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
182}
183
Len Brown4be44fc2005-08-05 00:44:28 -0400184static int acpi_ac_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185{
Len Brown4be44fc2005-08-05 00:44:28 -0400186 struct proc_dir_entry *entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
189 if (!acpi_device_dir(device)) {
190 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400191 acpi_ac_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400193 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 }
195
196 /* 'state' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700197 entry = proc_create_data(ACPI_AC_FILE_STATE,
198 S_IRUGO, acpi_device_dir(device),
199 &acpi_ac_fops, acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400201 return -ENODEV;
Patrick Mocheld550d982006-06-27 00:41:40 -0400202 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203}
204
Len Brown4be44fc2005-08-05 00:44:28 -0400205static int acpi_ac_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
208 if (acpi_device_dir(device)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400209 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210
211 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
212 acpi_device_dir(device) = NULL;
213 }
214
Patrick Mocheld550d982006-06-27 00:41:40 -0400215 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800217#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219/* --------------------------------------------------------------------------
220 Driver Model
221 -------------------------------------------------------------------------- */
222
Len Brown4be44fc2005-08-05 00:44:28 -0400223static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200225 struct acpi_ac *ac = data;
Len Brown4be44fc2005-08-05 00:44:28 -0400226 struct acpi_device *device = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
229 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400230 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Patrick Mochelaf961792006-05-19 16:54:32 -0400232 device = ac->device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 switch (event) {
Len Brownf163ff52008-06-14 01:26:37 -0400234 default:
235 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
236 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 case ACPI_AC_NOTIFY_STATUS:
Christian Lupien03d78252004-08-19 01:26:00 -0400238 case ACPI_NOTIFY_BUS_CHECK:
239 case ACPI_NOTIFY_DEVICE_CHECK:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 acpi_ac_get_state(ac);
Len Brown14e04fb2007-08-23 15:20:26 -0400241 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800242 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100243 dev_name(&device->dev), event,
Zhang Rui962ce8c2007-08-23 01:24:31 +0800244 (u32) ac->state);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500245#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400246 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500247#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 }
249
Patrick Mocheld550d982006-06-27 00:41:40 -0400250 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251}
252
Len Brown4be44fc2005-08-05 00:44:28 -0400253static int acpi_ac_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254{
Len Brown4be44fc2005-08-05 00:44:28 -0400255 int result = 0;
256 acpi_status status = AE_OK;
257 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400261 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
Burman Yan36bcbec2006-12-19 12:56:11 -0800263 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400265 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Patrick Mochelaf961792006-05-19 16:54:32 -0400267 ac->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
269 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700270 device->driver_data = ac;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272 result = acpi_ac_get_state(ac);
273 if (result)
274 goto end;
275
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300276#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 result = acpi_ac_add_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800278#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 if (result)
280 goto end;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500281#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400282 ac->charger.name = acpi_device_bid(device);
283 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
284 ac->charger.properties = ac_props;
285 ac->charger.num_properties = ARRAY_SIZE(ac_props);
286 ac->charger.get_property = get_ac_property;
287 power_supply_register(&ac->device->dev, &ac->charger);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500288#endif
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400289 status = acpi_install_notify_handler(device->handle,
Christian Lupien03d78252004-08-19 01:26:00 -0400290 ACPI_ALL_NOTIFY, acpi_ac_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400291 ac);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 result = -ENODEV;
294 goto end;
295 }
296
Len Brown4be44fc2005-08-05 00:44:28 -0400297 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
298 acpi_device_name(device), acpi_device_bid(device),
299 ac->state ? "on-line" : "off-line");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Len Brown4be44fc2005-08-05 00:44:28 -0400301 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 if (result) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300303#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 acpi_ac_remove_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800305#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 kfree(ac);
307 }
308
Patrick Mocheld550d982006-06-27 00:41:40 -0400309 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310}
311
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800312static int acpi_ac_resume(struct acpi_device *device)
313{
314 struct acpi_ac *ac;
315 unsigned old_state;
316 if (!device || !acpi_driver_data(device))
317 return -EINVAL;
318 ac = acpi_driver_data(device);
319 old_state = ac->state;
320 if (acpi_ac_get_state(ac))
321 return 0;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500322#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800323 if (old_state != ac->state)
324 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500325#endif
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800326 return 0;
327}
328
Len Brown4be44fc2005-08-05 00:44:28 -0400329static int acpi_ac_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330{
Len Brown4be44fc2005-08-05 00:44:28 -0400331 acpi_status status = AE_OK;
332 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
335 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400336 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200338 ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400340 status = acpi_remove_notify_handler(device->handle,
Christian Lupien03d78252004-08-19 01:26:00 -0400341 ACPI_ALL_NOTIFY, acpi_ac_notify);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500342#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400343 if (ac->charger.dev)
344 power_supply_unregister(&ac->charger);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500345#endif
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300346#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 acpi_ac_remove_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800348#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350 kfree(ac);
351
Patrick Mocheld550d982006-06-27 00:41:40 -0400352 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353}
354
Len Brown4be44fc2005-08-05 00:44:28 -0400355static int __init acpi_ac_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356{
Rich Townsend3f86b832006-07-01 11:36:54 -0400357 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Pavel Machek4d8316d2006-08-14 22:37:22 -0700359 if (acpi_disabled)
360 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300362#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400363 acpi_ac_dir = acpi_lock_ac_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 if (!acpi_ac_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400365 return -ENODEV;
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800366#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
368 result = acpi_bus_register_driver(&acpi_ac_driver);
369 if (result < 0) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300370#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400371 acpi_unlock_ac_dir(acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800372#endif
Patrick Mocheld550d982006-06-27 00:41:40 -0400373 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 }
375
Patrick Mocheld550d982006-06-27 00:41:40 -0400376 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377}
378
Len Brown4be44fc2005-08-05 00:44:28 -0400379static void __exit acpi_ac_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
382 acpi_bus_unregister_driver(&acpi_ac_driver);
383
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300384#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400385 acpi_unlock_ac_dir(acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800386#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Patrick Mocheld550d982006-06-27 00:41:40 -0400388 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389}
390
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391module_init(acpi_ac_init);
392module_exit(acpi_ac_exit);