blob: 76b9bea98b6d95729b6750072b7c40de2a9ec922 [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_COMPONENT 0x00020000
41#define ACPI_AC_CLASS "ac_adapter"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#define ACPI_AC_DEVICE_NAME "AC Adapter"
43#define ACPI_AC_FILE_STATE "state"
44#define ACPI_AC_NOTIFY_STATUS 0x80
45#define ACPI_AC_STATUS_OFFLINE 0x00
46#define ACPI_AC_STATUS_ONLINE 0x01
47#define ACPI_AC_STATUS_UNKNOWN 0xFF
48
49#define _COMPONENT ACPI_AC_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050050ACPI_MODULE_NAME("ac");
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Len Brownf52fd662007-02-12 22:42:12 -050052MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050053MODULE_DESCRIPTION("ACPI AC Adapter Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070054MODULE_LICENSE("GPL");
55
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030056#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -040057extern struct proc_dir_entry *acpi_lock_ac_dir(void);
58extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -080059static int acpi_ac_open_fs(struct inode *inode, struct file *file);
60#endif
Rich Townsend3f86b832006-07-01 11:36:54 -040061
Len Brown4be44fc2005-08-05 00:44:28 -040062static int acpi_ac_add(struct acpi_device *device);
63static int acpi_ac_remove(struct acpi_device *device, int type);
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -080064static int acpi_ac_resume(struct acpi_device *device);
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Thomas Renninger1ba90e32007-07-23 14:44:41 +020066const static struct acpi_device_id ac_device_ids[] = {
67 {"ACPI0003", 0},
68 {"", 0},
69};
70MODULE_DEVICE_TABLE(acpi, ac_device_ids);
71
Linus Torvalds1da177e2005-04-16 15:20:36 -070072static struct acpi_driver acpi_ac_driver = {
Len Brownc2b67052007-02-12 23:33:40 -050073 .name = "ac",
Len Brown4be44fc2005-08-05 00:44:28 -040074 .class = ACPI_AC_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +020075 .ids = ac_device_ids,
Len Brown4be44fc2005-08-05 00:44:28 -040076 .ops = {
77 .add = acpi_ac_add,
78 .remove = acpi_ac_remove,
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -080079 .resume = acpi_ac_resume,
Len Brown4be44fc2005-08-05 00:44:28 -040080 },
Linus Torvalds1da177e2005-04-16 15:20:36 -070081};
82
83struct acpi_ac {
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050084#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040085 struct power_supply charger;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050086#endif
Patrick Mochelaf961792006-05-19 16:54:32 -040087 struct acpi_device * device;
Len Brown4be44fc2005-08-05 00:44:28 -040088 unsigned long state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089};
90
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040091#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
92
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030093#ifdef CONFIG_ACPI_PROCFS_POWER
Arjan van de Vend7508032006-07-04 13:06:00 -040094static const struct file_operations acpi_ac_fops = {
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 acpi_device_dir(device)->owner = THIS_MODULE;
195 }
196
197 /* 'state' [R] */
198 entry = create_proc_entry(ACPI_AC_FILE_STATE,
Len Brown4be44fc2005-08-05 00:44:28 -0400199 S_IRUGO, acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400201 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 else {
203 entry->proc_fops = &acpi_ac_fops;
204 entry->data = acpi_driver_data(device);
205 entry->owner = THIS_MODULE;
206 }
207
Patrick Mocheld550d982006-06-27 00:41:40 -0400208 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209}
210
Len Brown4be44fc2005-08-05 00:44:28 -0400211static int acpi_ac_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
214 if (acpi_device_dir(device)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400215 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216
217 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
218 acpi_device_dir(device) = NULL;
219 }
220
Patrick Mocheld550d982006-06-27 00:41:40 -0400221 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222}
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800223#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225/* --------------------------------------------------------------------------
226 Driver Model
227 -------------------------------------------------------------------------- */
228
Len Brown4be44fc2005-08-05 00:44:28 -0400229static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200231 struct acpi_ac *ac = data;
Len Brown4be44fc2005-08-05 00:44:28 -0400232 struct acpi_device *device = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
235 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400236 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
Patrick Mochelaf961792006-05-19 16:54:32 -0400238 device = ac->device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 switch (event) {
240 case ACPI_AC_NOTIFY_STATUS:
Christian Lupien03d782522004-08-19 01:26:00 -0400241 case ACPI_NOTIFY_BUS_CHECK:
242 case ACPI_NOTIFY_DEVICE_CHECK:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 acpi_ac_get_state(ac);
Len Brown14e04fb2007-08-23 15:20:26 -0400244 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800245 acpi_bus_generate_netlink_event(device->pnp.device_class,
246 device->dev.bus_id, event,
247 (u32) ac->state);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500248#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400249 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500250#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 break;
252 default:
253 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
Len Brown4be44fc2005-08-05 00:44:28 -0400254 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 break;
256 }
257
Patrick Mocheld550d982006-06-27 00:41:40 -0400258 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259}
260
Len Brown4be44fc2005-08-05 00:44:28 -0400261static int acpi_ac_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262{
Len Brown4be44fc2005-08-05 00:44:28 -0400263 int result = 0;
264 acpi_status status = AE_OK;
265 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400269 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270
Burman Yan36bcbec2006-12-19 12:56:11 -0800271 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400273 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
Patrick Mochelaf961792006-05-19 16:54:32 -0400275 ac->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
277 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
278 acpi_driver_data(device) = ac;
279
280 result = acpi_ac_get_state(ac);
281 if (result)
282 goto end;
283
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300284#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 result = acpi_ac_add_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800286#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 if (result)
288 goto end;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500289#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400290 ac->charger.name = acpi_device_bid(device);
291 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
292 ac->charger.properties = ac_props;
293 ac->charger.num_properties = ARRAY_SIZE(ac_props);
294 ac->charger.get_property = get_ac_property;
295 power_supply_register(&ac->device->dev, &ac->charger);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500296#endif
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400297 status = acpi_install_notify_handler(device->handle,
Christian Lupien03d782522004-08-19 01:26:00 -0400298 ACPI_ALL_NOTIFY, acpi_ac_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400299 ac);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 result = -ENODEV;
302 goto end;
303 }
304
Len Brown4be44fc2005-08-05 00:44:28 -0400305 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
306 acpi_device_name(device), acpi_device_bid(device),
307 ac->state ? "on-line" : "off-line");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Len Brown4be44fc2005-08-05 00:44:28 -0400309 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 if (result) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300311#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 acpi_ac_remove_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800313#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 kfree(ac);
315 }
316
Patrick Mocheld550d982006-06-27 00:41:40 -0400317 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318}
319
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800320static int acpi_ac_resume(struct acpi_device *device)
321{
322 struct acpi_ac *ac;
323 unsigned old_state;
324 if (!device || !acpi_driver_data(device))
325 return -EINVAL;
326 ac = acpi_driver_data(device);
327 old_state = ac->state;
328 if (acpi_ac_get_state(ac))
329 return 0;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500330#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800331 if (old_state != ac->state)
332 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500333#endif
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800334 return 0;
335}
336
Len Brown4be44fc2005-08-05 00:44:28 -0400337static int acpi_ac_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338{
Len Brown4be44fc2005-08-05 00:44:28 -0400339 acpi_status status = AE_OK;
340 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400344 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200346 ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400348 status = acpi_remove_notify_handler(device->handle,
Christian Lupien03d782522004-08-19 01:26:00 -0400349 ACPI_ALL_NOTIFY, acpi_ac_notify);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500350#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400351 if (ac->charger.dev)
352 power_supply_unregister(&ac->charger);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500353#endif
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300354#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 acpi_ac_remove_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800356#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357
358 kfree(ac);
359
Patrick Mocheld550d982006-06-27 00:41:40 -0400360 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361}
362
Len Brown4be44fc2005-08-05 00:44:28 -0400363static int __init acpi_ac_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364{
Rich Townsend3f86b832006-07-01 11:36:54 -0400365 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366
Pavel Machek4d8316d2006-08-14 22:37:22 -0700367 if (acpi_disabled)
368 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300370#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400371 acpi_ac_dir = acpi_lock_ac_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 if (!acpi_ac_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400373 return -ENODEV;
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800374#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
376 result = acpi_bus_register_driver(&acpi_ac_driver);
377 if (result < 0) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300378#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400379 acpi_unlock_ac_dir(acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800380#endif
Patrick Mocheld550d982006-06-27 00:41:40 -0400381 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 }
383
Patrick Mocheld550d982006-06-27 00:41:40 -0400384 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385}
386
Len Brown4be44fc2005-08-05 00:44:28 -0400387static void __exit acpi_ac_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390 acpi_bus_unregister_driver(&acpi_ac_driver);
391
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300392#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400393 acpi_unlock_ac_dir(acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800394#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
Patrick Mocheld550d982006-06-27 00:41:40 -0400396 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397}
398
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399module_init(acpi_ac_init);
400module_exit(acpi_ac_exit);