blob: 58c3f74bd84cb2158bdd4a69e49931cee33c2ede [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>
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030031#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <linux/proc_fs.h>
33#include <linux/seq_file.h>
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -080034#endif
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040035#include <linux/power_supply.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <acpi/acpi_bus.h>
37#include <acpi/acpi_drivers.h>
38
Len Browna192a952009-07-28 16:45:54 -040039#define PREFIX "ACPI: "
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041#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);
Bjorn Helgaas48fe1122009-04-30 09:35:42 -060065static void acpi_ac_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Tobias Klauserb299c222008-04-21 22:24:53 +000067static const struct acpi_device_id ac_device_ids[] = {
Thomas Renninger1ba90e32007-07-23 14:44:41 +020068 {"ACPI0003", 0},
69 {"", 0},
70};
71MODULE_DEVICE_TABLE(acpi, ac_device_ids);
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073static struct acpi_driver acpi_ac_driver = {
Len Brownc2b67052007-02-12 23:33:40 -050074 .name = "ac",
Len Brown4be44fc2005-08-05 00:44:28 -040075 .class = ACPI_AC_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +020076 .ids = ac_device_ids,
Bjorn Helgaas48fe1122009-04-30 09:35:42 -060077 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
Len Brown4be44fc2005-08-05 00:44:28 -040078 .ops = {
79 .add = acpi_ac_add,
80 .remove = acpi_ac_remove,
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -080081 .resume = acpi_ac_resume,
Bjorn Helgaas48fe1122009-04-30 09:35:42 -060082 .notify = acpi_ac_notify,
Len Brown4be44fc2005-08-05 00:44:28 -040083 },
Linus Torvalds1da177e2005-04-16 15:20:36 -070084};
85
86struct acpi_ac {
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040087 struct power_supply charger;
Patrick Mochelaf961792006-05-19 16:54:32 -040088 struct acpi_device * device;
Matthew Wilcox27663c52008-10-10 02:22:59 -040089 unsigned long long state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090};
91
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040092#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
93
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030094#ifdef CONFIG_ACPI_PROCFS_POWER
Arjan van de Vend7508032006-07-04 13:06:00 -040095static const struct file_operations acpi_ac_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -070096 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -040097 .open = acpi_ac_open_fs,
98 .read = seq_read,
99 .llseek = seq_lseek,
100 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101};
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800102#endif
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104/* --------------------------------------------------------------------------
105 AC Adapter Management
106 -------------------------------------------------------------------------- */
107
Len Brown4be44fc2005-08-05 00:44:28 -0400108static int acpi_ac_get_state(struct acpi_ac *ac)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109{
Len Brown4be44fc2005-08-05 00:44:28 -0400110 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400114 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400116 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400118 ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 ac->state = ACPI_AC_STATUS_UNKNOWN;
Patrick Mocheld550d982006-06-27 00:41:40 -0400120 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 }
Len Brown4be44fc2005-08-05 00:44:28 -0400122
Patrick Mocheld550d982006-06-27 00:41:40 -0400123 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124}
125
Zhang Rui3151dbb2010-12-08 10:40:45 +0800126/* --------------------------------------------------------------------------
127 sysfs I/F
128 -------------------------------------------------------------------------- */
129static int get_ac_property(struct power_supply *psy,
130 enum power_supply_property psp,
131 union power_supply_propval *val)
132{
133 struct acpi_ac *ac = to_acpi_ac(psy);
134
135 if (!ac)
136 return -ENODEV;
137
138 if (acpi_ac_get_state(ac))
139 return -ENODEV;
140
141 switch (psp) {
142 case POWER_SUPPLY_PROP_ONLINE:
143 val->intval = ac->state;
144 break;
145 default:
146 return -EINVAL;
147 }
148 return 0;
149}
150
151static enum power_supply_property ac_props[] = {
152 POWER_SUPPLY_PROP_ONLINE,
153};
154
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300155#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156/* --------------------------------------------------------------------------
157 FS Interface (/proc)
158 -------------------------------------------------------------------------- */
159
Len Brown4be44fc2005-08-05 00:44:28 -0400160static struct proc_dir_entry *acpi_ac_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
163{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200164 struct acpi_ac *ac = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400168 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
170 if (acpi_ac_get_state(ac)) {
171 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400172 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 }
174
175 seq_puts(seq, "state: ");
176 switch (ac->state) {
177 case ACPI_AC_STATUS_OFFLINE:
178 seq_puts(seq, "off-line\n");
179 break;
180 case ACPI_AC_STATUS_ONLINE:
181 seq_puts(seq, "on-line\n");
182 break;
183 default:
184 seq_puts(seq, "unknown\n");
185 break;
186 }
187
Patrick Mocheld550d982006-06-27 00:41:40 -0400188 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189}
Len Brown4be44fc2005-08-05 00:44:28 -0400190
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191static int acpi_ac_open_fs(struct inode *inode, struct file *file)
192{
193 return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
194}
195
Len Brown4be44fc2005-08-05 00:44:28 -0400196static int acpi_ac_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197{
Len Brown4be44fc2005-08-05 00:44:28 -0400198 struct proc_dir_entry *entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
Zhang Rui6d855fc2011-01-10 11:16:30 +0800200 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
201 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 if (!acpi_device_dir(device)) {
203 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400204 acpi_ac_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400206 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 }
208
209 /* 'state' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700210 entry = proc_create_data(ACPI_AC_FILE_STATE,
211 S_IRUGO, acpi_device_dir(device),
212 &acpi_ac_fops, acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400214 return -ENODEV;
Patrick Mocheld550d982006-06-27 00:41:40 -0400215 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216}
217
Len Brown4be44fc2005-08-05 00:44:28 -0400218static int acpi_ac_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
221 if (acpi_device_dir(device)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400222 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
224 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
225 acpi_device_dir(device) = NULL;
226 }
227
Patrick Mocheld550d982006-06-27 00:41:40 -0400228 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229}
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800230#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232/* --------------------------------------------------------------------------
233 Driver Model
234 -------------------------------------------------------------------------- */
235
Bjorn Helgaas48fe1122009-04-30 09:35:42 -0600236static void acpi_ac_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
Bjorn Helgaas48fe1122009-04-30 09:35:42 -0600238 struct acpi_ac *ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
241 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400242 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 switch (event) {
Len Brownf163ff52008-06-14 01:26:37 -0400245 default:
246 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
247 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 case ACPI_AC_NOTIFY_STATUS:
Christian Lupien03d782522004-08-19 01:26:00 -0400249 case ACPI_NOTIFY_BUS_CHECK:
250 case ACPI_NOTIFY_DEVICE_CHECK:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 acpi_ac_get_state(ac);
Len Brown14e04fb2007-08-23 15:20:26 -0400252 acpi_bus_generate_proc_event(device, event, (u32) ac->state);
Zhang Rui962ce8c2007-08-23 01:24:31 +0800253 acpi_bus_generate_netlink_event(device->pnp.device_class,
Kay Sievers07944692008-10-30 01:18:59 +0100254 dev_name(&device->dev), event,
Zhang Rui962ce8c2007-08-23 01:24:31 +0800255 (u32) ac->state);
Mark Langsdorf68b92b52009-08-11 15:15:42 -0500256 acpi_notifier_call_chain(device, event, (u32) ac->state);
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400257 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 }
259
Patrick Mocheld550d982006-06-27 00:41:40 -0400260 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261}
262
Len Brown4be44fc2005-08-05 00:44:28 -0400263static int acpi_ac_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264{
Len Brown4be44fc2005-08-05 00:44:28 -0400265 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400266 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
269 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400270 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Burman Yan36bcbec2006-12-19 12:56:11 -0800272 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400274 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Patrick Mochelaf961792006-05-19 16:54:32 -0400276 ac->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
278 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700279 device->driver_data = ac;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
281 result = acpi_ac_get_state(ac);
282 if (result)
283 goto end;
284
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300285#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 result = acpi_ac_add_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800287#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 if (result)
289 goto end;
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
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;
322 if (old_state != ac->state)
323 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
324 return 0;
325}
326
Len Brown4be44fc2005-08-05 00:44:28 -0400327static int acpi_ac_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328{
Len Brown4be44fc2005-08-05 00:44:28 -0400329 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
332 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400333 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200335 ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400337 if (ac->charger.dev)
338 power_supply_unregister(&ac->charger);
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300339#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 acpi_ac_remove_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800341#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
343 kfree(ac);
344
Patrick Mocheld550d982006-06-27 00:41:40 -0400345 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
Len Brown4be44fc2005-08-05 00:44:28 -0400348static int __init acpi_ac_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349{
Rich Townsend3f86b832006-07-01 11:36:54 -0400350 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351
Pavel Machek4d8316d2006-08-14 22:37:22 -0700352 if (acpi_disabled)
353 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300355#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400356 acpi_ac_dir = acpi_lock_ac_dir();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 if (!acpi_ac_dir)
Patrick Mocheld550d982006-06-27 00:41:40 -0400358 return -ENODEV;
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800359#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
361 result = acpi_bus_register_driver(&acpi_ac_driver);
362 if (result < 0) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300363#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400364 acpi_unlock_ac_dir(acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800365#endif
Patrick Mocheld550d982006-06-27 00:41:40 -0400366 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 }
368
Patrick Mocheld550d982006-06-27 00:41:40 -0400369 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370}
371
Len Brown4be44fc2005-08-05 00:44:28 -0400372static void __exit acpi_ac_exit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375 acpi_bus_unregister_driver(&acpi_ac_driver);
376
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300377#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -0400378 acpi_unlock_ac_dir(acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800379#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380
Patrick Mocheld550d982006-06-27 00:41:40 -0400381 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382}
383
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384module_init(acpi_ac_init);
385module_exit(acpi_ac_exit);