blob: 831883b7d6c9c5f456bb8db766ebc978b00bd907 [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
Tobias Klauserb299c222008-04-21 22:24:53 +000066static const struct acpi_device_id ac_device_ids[] = {
Thomas Renninger1ba90e32007-07-23 14:44:41 +020067 {"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 = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -070095 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -040096 .open = acpi_ac_open_fs,
97 .read = seq_read,
98 .llseek = seq_lseek,
99 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100};
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800101#endif
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500102#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400103static int get_ac_property(struct power_supply *psy,
104 enum power_supply_property psp,
105 union power_supply_propval *val)
106{
107 struct acpi_ac *ac = to_acpi_ac(psy);
108 switch (psp) {
109 case POWER_SUPPLY_PROP_ONLINE:
110 val->intval = ac->state;
111 break;
112 default:
113 return -EINVAL;
114 }
115 return 0;
116}
117
118static enum power_supply_property ac_props[] = {
119 POWER_SUPPLY_PROP_ONLINE,
120};
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500121#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122/* --------------------------------------------------------------------------
123 AC Adapter Management
124 -------------------------------------------------------------------------- */
125
Len Brown4be44fc2005-08-05 00:44:28 -0400126static int acpi_ac_get_state(struct acpi_ac *ac)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127{
Len Brown4be44fc2005-08-05 00:44:28 -0400128 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400132 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400134 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400136 ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 ac->state = ACPI_AC_STATUS_UNKNOWN;
Patrick Mocheld550d982006-06-27 00:41:40 -0400138 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 }
Len Brown4be44fc2005-08-05 00:44:28 -0400140
Patrick Mocheld550d982006-06-27 00:41:40 -0400141 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142}
143
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300144#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145/* --------------------------------------------------------------------------
146 FS Interface (/proc)
147 -------------------------------------------------------------------------- */
148
Len Brown4be44fc2005-08-05 00:44:28 -0400149static struct proc_dir_entry *acpi_ac_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
151static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
152{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200153 struct acpi_ac *ac = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400157 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159 if (acpi_ac_get_state(ac)) {
160 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400161 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 }
163
164 seq_puts(seq, "state: ");
165 switch (ac->state) {
166 case ACPI_AC_STATUS_OFFLINE:
167 seq_puts(seq, "off-line\n");
168 break;
169 case ACPI_AC_STATUS_ONLINE:
170 seq_puts(seq, "on-line\n");
171 break;
172 default:
173 seq_puts(seq, "unknown\n");
174 break;
175 }
176
Patrick Mocheld550d982006-06-27 00:41:40 -0400177 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178}
Len Brown4be44fc2005-08-05 00:44:28 -0400179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180static int acpi_ac_open_fs(struct inode *inode, struct file *file)
181{
182 return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
183}
184
Len Brown4be44fc2005-08-05 00:44:28 -0400185static int acpi_ac_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186{
Len Brown4be44fc2005-08-05 00:44:28 -0400187 struct proc_dir_entry *entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 if (!acpi_device_dir(device)) {
191 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400192 acpi_ac_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400194 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 acpi_device_dir(device)->owner = THIS_MODULE;
196 }
197
198 /* 'state' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700199 entry = proc_create_data(ACPI_AC_FILE_STATE,
200 S_IRUGO, acpi_device_dir(device),
201 &acpi_ac_fops, acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400203 return -ENODEV;
Patrick Mocheld550d982006-06-27 00:41:40 -0400204 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205}
206
Len Brown4be44fc2005-08-05 00:44:28 -0400207static int acpi_ac_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
210 if (acpi_device_dir(device)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400211 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
213 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
214 acpi_device_dir(device) = NULL;
215 }
216
Patrick Mocheld550d982006-06-27 00:41:40 -0400217 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218}
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800219#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221/* --------------------------------------------------------------------------
222 Driver Model
223 -------------------------------------------------------------------------- */
224
Len Brown4be44fc2005-08-05 00:44:28 -0400225static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200227 struct acpi_ac *ac = data;
Len Brown4be44fc2005-08-05 00:44:28 -0400228 struct acpi_device *device = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400232 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233
Patrick Mochelaf961792006-05-19 16:54:32 -0400234 device = ac->device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 switch (event) {
Len Brownf163ff52008-06-14 01:26:37 -0400236 default:
237 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
238 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 case ACPI_AC_NOTIFY_STATUS:
Christian Lupien03d782522004-08-19 01:26:00 -0400240 case ACPI_NOTIFY_BUS_CHECK:
241 case ACPI_NOTIFY_DEVICE_CHECK:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 acpi_ac_get_state(ac);
Len Brown14e04fb2007-08-23 15:20:26 -0400243 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800244 acpi_bus_generate_netlink_event(device->pnp.device_class,
245 device->dev.bus_id, event,
246 (u32) ac->state);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500247#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400248 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500249#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 }
251
Patrick Mocheld550d982006-06-27 00:41:40 -0400252 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253}
254
Len Brown4be44fc2005-08-05 00:44:28 -0400255static int acpi_ac_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256{
Len Brown4be44fc2005-08-05 00:44:28 -0400257 int result = 0;
258 acpi_status status = AE_OK;
259 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400263 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264
Burman Yan36bcbec2006-12-19 12:56:11 -0800265 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400267 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Patrick Mochelaf961792006-05-19 16:54:32 -0400269 ac->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
271 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
272 acpi_driver_data(device) = ac;
273
274 result = acpi_ac_get_state(ac);
275 if (result)
276 goto end;
277
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300278#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 result = acpi_ac_add_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800280#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 if (result)
282 goto end;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500283#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400284 ac->charger.name = acpi_device_bid(device);
285 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
286 ac->charger.properties = ac_props;
287 ac->charger.num_properties = ARRAY_SIZE(ac_props);
288 ac->charger.get_property = get_ac_property;
289 power_supply_register(&ac->device->dev, &ac->charger);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500290#endif
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400291 status = acpi_install_notify_handler(device->handle,
Christian Lupien03d782522004-08-19 01:26:00 -0400292 ACPI_ALL_NOTIFY, acpi_ac_notify,
Len Brown4be44fc2005-08-05 00:44:28 -0400293 ac);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 if (ACPI_FAILURE(status)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 result = -ENODEV;
296 goto end;
297 }
298
Len Brown4be44fc2005-08-05 00:44:28 -0400299 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
300 acpi_device_name(device), acpi_device_bid(device),
301 ac->state ? "on-line" : "off-line");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
Len Brown4be44fc2005-08-05 00:44:28 -0400303 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 if (result) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300305#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 acpi_ac_remove_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800307#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 kfree(ac);
309 }
310
Patrick Mocheld550d982006-06-27 00:41:40 -0400311 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}
313
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800314static int acpi_ac_resume(struct acpi_device *device)
315{
316 struct acpi_ac *ac;
317 unsigned old_state;
318 if (!device || !acpi_driver_data(device))
319 return -EINVAL;
320 ac = acpi_driver_data(device);
321 old_state = ac->state;
322 if (acpi_ac_get_state(ac))
323 return 0;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500324#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800325 if (old_state != ac->state)
326 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500327#endif
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800328 return 0;
329}
330
Len Brown4be44fc2005-08-05 00:44:28 -0400331static int acpi_ac_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332{
Len Brown4be44fc2005-08-05 00:44:28 -0400333 acpi_status status = AE_OK;
334 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
337 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400338 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200340 ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400342 status = acpi_remove_notify_handler(device->handle,
Christian Lupien03d782522004-08-19 01:26:00 -0400343 ACPI_ALL_NOTIFY, acpi_ac_notify);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500344#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400345 if (ac->charger.dev)
346 power_supply_unregister(&ac->charger);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500347#endif
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300348#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 acpi_ac_remove_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800350#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
352 kfree(ac);
353
Patrick Mocheld550d982006-06-27 00:41:40 -0400354 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355}
356
Len Brown4be44fc2005-08-05 00:44:28 -0400357static int __init acpi_ac_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358{
Rich Townsend3f86b832006-07-01 11:36:54 -0400359 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
Pavel Machek4d8316d2006-08-14 22:37:22 -0700361 if (acpi_disabled)
362 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300364#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400365 acpi_ac_dir = acpi_lock_ac_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 if (!acpi_ac_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400367 return -ENODEV;
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800368#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370 result = acpi_bus_register_driver(&acpi_ac_driver);
371 if (result < 0) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300372#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400373 acpi_unlock_ac_dir(acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800374#endif
Patrick Mocheld550d982006-06-27 00:41:40 -0400375 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 }
377
Patrick Mocheld550d982006-06-27 00:41:40 -0400378 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379}
380
Len Brown4be44fc2005-08-05 00:44:28 -0400381static void __exit acpi_ac_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
384 acpi_bus_unregister_driver(&acpi_ac_driver);
385
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300386#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400387 acpi_unlock_ac_dir(acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800388#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
Patrick Mocheld550d982006-06-27 00:41:40 -0400390 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391}
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393module_init(acpi_ac_init);
394module_exit(acpi_ac_exit);