blob: b6ed60b57b0dd095686479862064ae42d4fc8a2c [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
Len Browna192a952009-07-28 16:45:54 -040040#define PREFIX "ACPI: "
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#define ACPI_AC_CLASS "ac_adapter"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043#define ACPI_AC_DEVICE_NAME "AC Adapter"
44#define ACPI_AC_FILE_STATE "state"
45#define ACPI_AC_NOTIFY_STATUS 0x80
46#define ACPI_AC_STATUS_OFFLINE 0x00
47#define ACPI_AC_STATUS_ONLINE 0x01
48#define ACPI_AC_STATUS_UNKNOWN 0xFF
49
50#define _COMPONENT ACPI_AC_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050051ACPI_MODULE_NAME("ac");
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Len Brownf52fd662007-02-12 22:42:12 -050053MODULE_AUTHOR("Paul Diefenbaugh");
Len Brown7cda93e2007-02-12 23:50:02 -050054MODULE_DESCRIPTION("ACPI AC Adapter Driver");
Linus Torvalds1da177e2005-04-16 15:20:36 -070055MODULE_LICENSE("GPL");
56
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030057#ifdef CONFIG_ACPI_PROCFS_POWER
Rich Townsend3f86b832006-07-01 11:36:54 -040058extern struct proc_dir_entry *acpi_lock_ac_dir(void);
59extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -080060static int acpi_ac_open_fs(struct inode *inode, struct file *file);
61#endif
Rich Townsend3f86b832006-07-01 11:36:54 -040062
Len Brown4be44fc2005-08-05 00:44:28 -040063static int acpi_ac_add(struct acpi_device *device);
64static int acpi_ac_remove(struct acpi_device *device, int type);
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -080065static int acpi_ac_resume(struct acpi_device *device);
Bjorn Helgaas48fe1122009-04-30 09:35:42 -060066static void acpi_ac_notify(struct acpi_device *device, u32 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Tobias Klauserb299c222008-04-21 22:24:53 +000068static const struct acpi_device_id ac_device_ids[] = {
Thomas Renninger1ba90e32007-07-23 14:44:41 +020069 {"ACPI0003", 0},
70 {"", 0},
71};
72MODULE_DEVICE_TABLE(acpi, ac_device_ids);
73
Linus Torvalds1da177e2005-04-16 15:20:36 -070074static struct acpi_driver acpi_ac_driver = {
Len Brownc2b67052007-02-12 23:33:40 -050075 .name = "ac",
Len Brown4be44fc2005-08-05 00:44:28 -040076 .class = ACPI_AC_CLASS,
Thomas Renninger1ba90e32007-07-23 14:44:41 +020077 .ids = ac_device_ids,
Bjorn Helgaas48fe1122009-04-30 09:35:42 -060078 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
Len Brown4be44fc2005-08-05 00:44:28 -040079 .ops = {
80 .add = acpi_ac_add,
81 .remove = acpi_ac_remove,
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -080082 .resume = acpi_ac_resume,
Bjorn Helgaas48fe1122009-04-30 09:35:42 -060083 .notify = acpi_ac_notify,
Len Brown4be44fc2005-08-05 00:44:28 -040084 },
Linus Torvalds1da177e2005-04-16 15:20:36 -070085};
86
87struct acpi_ac {
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050088#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040089 struct power_supply charger;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -050090#endif
Patrick Mochelaf961792006-05-19 16:54:32 -040091 struct acpi_device * device;
Matthew Wilcox27663c52008-10-10 02:22:59 -040092 unsigned long long state;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093};
94
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +040095#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
96
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +030097#ifdef CONFIG_ACPI_PROCFS_POWER
Arjan van de Vend7508032006-07-04 13:06:00 -040098static const struct file_operations acpi_ac_fops = {
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -070099 .owner = THIS_MODULE,
Len Brown4be44fc2005-08-05 00:44:28 -0400100 .open = acpi_ac_open_fs,
101 .read = seq_read,
102 .llseek = seq_lseek,
103 .release = single_release,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104};
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800105#endif
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500106#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400107static int get_ac_property(struct power_supply *psy,
108 enum power_supply_property psp,
109 union power_supply_propval *val)
110{
111 struct acpi_ac *ac = to_acpi_ac(psy);
112 switch (psp) {
113 case POWER_SUPPLY_PROP_ONLINE:
114 val->intval = ac->state;
115 break;
116 default:
117 return -EINVAL;
118 }
119 return 0;
120}
121
122static enum power_supply_property ac_props[] = {
123 POWER_SUPPLY_PROP_ONLINE,
124};
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500125#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126/* --------------------------------------------------------------------------
127 AC Adapter Management
128 -------------------------------------------------------------------------- */
129
Len Brown4be44fc2005-08-05 00:44:28 -0400130static int acpi_ac_get_state(struct acpi_ac *ac)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
Len Brown4be44fc2005-08-05 00:44:28 -0400132 acpi_status status = AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400136 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Patrick Mochela6ba5eb2006-05-19 16:54:41 -0400138 status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 if (ACPI_FAILURE(status)) {
Thomas Renningera6fc6722006-06-26 23:58:43 -0400140 ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 ac->state = ACPI_AC_STATUS_UNKNOWN;
Patrick Mocheld550d982006-06-27 00:41:40 -0400142 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 }
Len Brown4be44fc2005-08-05 00:44:28 -0400144
Patrick Mocheld550d982006-06-27 00:41:40 -0400145 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146}
147
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300148#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149/* --------------------------------------------------------------------------
150 FS Interface (/proc)
151 -------------------------------------------------------------------------- */
152
Len Brown4be44fc2005-08-05 00:44:28 -0400153static struct proc_dir_entry *acpi_ac_dir;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
156{
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200157 struct acpi_ac *ac = seq->private;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
160 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400161 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 if (acpi_ac_get_state(ac)) {
164 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
Patrick Mocheld550d982006-06-27 00:41:40 -0400165 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166 }
167
168 seq_puts(seq, "state: ");
169 switch (ac->state) {
170 case ACPI_AC_STATUS_OFFLINE:
171 seq_puts(seq, "off-line\n");
172 break;
173 case ACPI_AC_STATUS_ONLINE:
174 seq_puts(seq, "on-line\n");
175 break;
176 default:
177 seq_puts(seq, "unknown\n");
178 break;
179 }
180
Patrick Mocheld550d982006-06-27 00:41:40 -0400181 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182}
Len Brown4be44fc2005-08-05 00:44:28 -0400183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184static int acpi_ac_open_fs(struct inode *inode, struct file *file)
185{
186 return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
187}
188
Len Brown4be44fc2005-08-05 00:44:28 -0400189static int acpi_ac_add_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{
Len Brown4be44fc2005-08-05 00:44:28 -0400191 struct proc_dir_entry *entry = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
194 if (!acpi_device_dir(device)) {
195 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
Len Brown4be44fc2005-08-05 00:44:28 -0400196 acpi_ac_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 if (!acpi_device_dir(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400198 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 }
200
201 /* 'state' [R] */
Denis V. Lunevcf7acfa2008-04-29 01:02:27 -0700202 entry = proc_create_data(ACPI_AC_FILE_STATE,
203 S_IRUGO, acpi_device_dir(device),
204 &acpi_ac_fops, acpi_driver_data(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 if (!entry)
Patrick Mocheld550d982006-06-27 00:41:40 -0400206 return -ENODEV;
Patrick Mocheld550d982006-06-27 00:41:40 -0400207 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208}
209
Len Brown4be44fc2005-08-05 00:44:28 -0400210static int acpi_ac_remove_fs(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
213 if (acpi_device_dir(device)) {
Len Brown4be44fc2005-08-05 00:44:28 -0400214 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
216 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
217 acpi_device_dir(device) = NULL;
218 }
219
Patrick Mocheld550d982006-06-27 00:41:40 -0400220 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221}
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800222#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224/* --------------------------------------------------------------------------
225 Driver Model
226 -------------------------------------------------------------------------- */
227
Bjorn Helgaas48fe1122009-04-30 09:35:42 -0600228static void acpi_ac_notify(struct acpi_device *device, u32 event)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229{
Bjorn Helgaas48fe1122009-04-30 09:35:42 -0600230 struct acpi_ac *ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232
233 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400234 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 switch (event) {
Len Brownf163ff52008-06-14 01:26:37 -0400237 default:
238 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
239 "Unsupported event [0x%x]\n", event));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 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,
Kay Sievers07944692008-10-30 01:18:59 +0100246 dev_name(&device->dev), event,
Zhang Rui962ce8c2007-08-23 01:24:31 +0800247 (u32) ac->state);
Mark Langsdorf68b92b52009-08-11 15:15:42 -0500248 acpi_notifier_call_chain(device, event, (u32) ac->state);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500249#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400250 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500251#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 }
253
Patrick Mocheld550d982006-06-27 00:41:40 -0400254 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255}
256
Len Brown4be44fc2005-08-05 00:44:28 -0400257static int acpi_ac_add(struct acpi_device *device)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258{
Len Brown4be44fc2005-08-05 00:44:28 -0400259 int result = 0;
Len Brown4be44fc2005-08-05 00:44:28 -0400260 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262
263 if (!device)
Patrick Mocheld550d982006-06-27 00:41:40 -0400264 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265
Burman Yan36bcbec2006-12-19 12:56:11 -0800266 ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 if (!ac)
Patrick Mocheld550d982006-06-27 00:41:40 -0400268 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
Patrick Mochelaf961792006-05-19 16:54:32 -0400270 ac->device = device;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
272 strcpy(acpi_device_class(device), ACPI_AC_CLASS);
Pavel Machekdb89b4f2008-09-22 14:37:34 -0700273 device->driver_data = ac;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274
275 result = acpi_ac_get_state(ac);
276 if (result)
277 goto end;
278
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300279#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 result = acpi_ac_add_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800281#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 if (result)
283 goto end;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500284#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400285 ac->charger.name = acpi_device_bid(device);
286 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
287 ac->charger.properties = ac_props;
288 ac->charger.num_properties = ARRAY_SIZE(ac_props);
289 ac->charger.get_property = get_ac_property;
290 power_supply_register(&ac->device->dev, &ac->charger);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500291#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Len Brown4be44fc2005-08-05 00:44:28 -0400293 printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
294 acpi_device_name(device), acpi_device_bid(device),
295 ac->state ? "on-line" : "off-line");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Len Brown4be44fc2005-08-05 00:44:28 -0400297 end:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 if (result) {
Alexey Starikovskiyfdcedbb2007-11-19 16:33:45 +0300299#ifdef CONFIG_ACPI_PROCFS_POWER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 acpi_ac_remove_fs(device);
Andrey Borzenkov8a246ee2007-11-14 17:00:37 -0800301#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 kfree(ac);
303 }
304
Patrick Mocheld550d982006-06-27 00:41:40 -0400305 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306}
307
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800308static int acpi_ac_resume(struct acpi_device *device)
309{
310 struct acpi_ac *ac;
311 unsigned old_state;
312 if (!device || !acpi_driver_data(device))
313 return -EINVAL;
314 ac = acpi_driver_data(device);
315 old_state = ac->state;
316 if (acpi_ac_get_state(ac))
317 return 0;
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500318#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800319 if (old_state != ac->state)
320 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500321#endif
Alexey Starikovskiy5bfeca32007-11-14 17:00:39 -0800322 return 0;
323}
324
Len Brown4be44fc2005-08-05 00:44:28 -0400325static int acpi_ac_remove(struct acpi_device *device, int type)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326{
Len Brown4be44fc2005-08-05 00:44:28 -0400327 struct acpi_ac *ac = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329
330 if (!device || !acpi_driver_data(device))
Patrick Mocheld550d982006-06-27 00:41:40 -0400331 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332
Jan Engelhardt50dd0962006-10-01 00:28:50 +0200333 ac = acpi_driver_data(device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500335#ifdef CONFIG_ACPI_SYSFS_POWER
Alexey Starikovskiyd5b4a3d2007-09-26 19:44:06 +0400336 if (ac->charger.dev)
337 power_supply_unregister(&ac->charger);
Alexey Starikovskiy97749cd2008-01-01 14:27:24 -0500338#endif
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);