[net-next-2.6.git] / drivers / acpi / ac.c

/*
 *  acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#ifdef CONFIG_ACPI_PROCFS_POWER
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#endif
#include <linux/power_supply.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define PREFIX "ACPI: "

#define ACPI_AC_CLASS			"ac_adapter"
#define ACPI_AC_DEVICE_NAME		"AC Adapter"
#define ACPI_AC_FILE_STATE		"state"
#define ACPI_AC_NOTIFY_STATUS		0x80
#define ACPI_AC_STATUS_OFFLINE		0x00
#define ACPI_AC_STATUS_ONLINE		0x01
#define ACPI_AC_STATUS_UNKNOWN		0xFF

#define _COMPONENT		ACPI_AC_COMPONENT
ACPI_MODULE_NAME("ac");

MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI AC Adapter Driver");
MODULE_LICENSE("GPL");

#ifdef CONFIG_ACPI_PROCFS_POWER
extern struct proc_dir_entry *acpi_lock_ac_dir(void);
extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
static int acpi_ac_open_fs(struct inode *inode, struct file *file);
#endif

static int acpi_ac_add(struct acpi_device *device);
static int acpi_ac_remove(struct acpi_device *device, int type);
static int acpi_ac_resume(struct acpi_device *device);
static void acpi_ac_notify(struct acpi_device *device, u32 event);

static const struct acpi_device_id ac_device_ids[] = {
	{"ACPI0003", 0},
	{"", 0},
};
MODULE_DEVICE_TABLE(acpi, ac_device_ids);

static struct acpi_driver acpi_ac_driver = {
	.name = "ac",
	.class = ACPI_AC_CLASS,
	.ids = ac_device_ids,
	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	.ops = {
		.add = acpi_ac_add,
		.remove = acpi_ac_remove,
		.resume = acpi_ac_resume,
		.notify = acpi_ac_notify,
		},
};

struct acpi_ac {
	struct power_supply charger;
	struct acpi_device * device;
	unsigned long long state;
};

#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);

#ifdef CONFIG_ACPI_PROCFS_POWER
static const struct file_operations acpi_ac_fops = {
	.owner = THIS_MODULE,
	.open = acpi_ac_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};
#endif
static int get_ac_property(struct power_supply *psy,
			   enum power_supply_property psp,
			   union power_supply_propval *val)
{
	struct acpi_ac *ac = to_acpi_ac(psy);
	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = ac->state;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static enum power_supply_property ac_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};
/* --------------------------------------------------------------------------
                               AC Adapter Management
   -------------------------------------------------------------------------- */

static int acpi_ac_get_state(struct acpi_ac *ac)
{
	acpi_status status = AE_OK;


	if (!ac)
		return -EINVAL;

	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
	if (ACPI_FAILURE(status)) {
		ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
		ac->state = ACPI_AC_STATUS_UNKNOWN;
		return -ENODEV;
	}

	return 0;
}

#ifdef CONFIG_ACPI_PROCFS_POWER
/* --------------------------------------------------------------------------
                              FS Interface (/proc)
   -------------------------------------------------------------------------- */

static struct proc_dir_entry *acpi_ac_dir;

static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
{
	struct acpi_ac *ac = seq->private;


	if (!ac)
		return 0;

	if (acpi_ac_get_state(ac)) {
		seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
		return 0;
	}

	seq_puts(seq, "state:                   ");
	switch (ac->state) {
	case ACPI_AC_STATUS_OFFLINE:
		seq_puts(seq, "off-line\n");
		break;
	case ACPI_AC_STATUS_ONLINE:
		seq_puts(seq, "on-line\n");
		break;
	default:
		seq_puts(seq, "unknown\n");
		break;
	}

	return 0;
}

static int acpi_ac_open_fs(struct inode *inode, struct file *file)
{
	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
}

static int acpi_ac_add_fs(struct acpi_device *device)
{
	struct proc_dir_entry *entry = NULL;


	if (!acpi_device_dir(device)) {
		acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
						     acpi_ac_dir);
		if (!acpi_device_dir(device))
			return -ENODEV;
	}

	/* 'state' [R] */
	entry = proc_create_data(ACPI_AC_FILE_STATE,
				 S_IRUGO, acpi_device_dir(device),
				 &acpi_ac_fops, acpi_driver_data(device));
	if (!entry)
		return -ENODEV;
	return 0;
}

static int acpi_ac_remove_fs(struct acpi_device *device)
{

	if (acpi_device_dir(device)) {
		remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));

		remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
		acpi_device_dir(device) = NULL;
	}

	return 0;
}
#endif

/* --------------------------------------------------------------------------
                                   Driver Model
   -------------------------------------------------------------------------- */

static void acpi_ac_notify(struct acpi_device *device, u32 event)
{
	struct acpi_ac *ac = acpi_driver_data(device);


	if (!ac)
		return;

	switch (event) {
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
	case ACPI_AC_NOTIFY_STATUS:
	case ACPI_NOTIFY_BUS_CHECK:
	case ACPI_NOTIFY_DEVICE_CHECK:
		acpi_ac_get_state(ac);
		acpi_bus_generate_proc_event(device, event, (u32) ac->state);
		acpi_bus_generate_netlink_event(device->pnp.device_class,
						  dev_name(&device->dev), event,
						  (u32) ac->state);
		acpi_notifier_call_chain(device, event, (u32) ac->state);
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	}

	return;
}

static int acpi_ac_add(struct acpi_device *device)
{
	int result = 0;
	struct acpi_ac *ac = NULL;


	if (!device)
		return -EINVAL;

	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
	if (!ac)
		return -ENOMEM;

	ac->device = device;
	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	device->driver_data = ac;

	result = acpi_ac_get_state(ac);
	if (result)
		goto end;

#ifdef CONFIG_ACPI_PROCFS_POWER
	result = acpi_ac_add_fs(device);
#endif
	if (result)
		goto end;
	ac->charger.name = acpi_device_bid(device);
	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	ac->charger.properties = ac_props;
	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	ac->charger.get_property = get_ac_property;
	power_supply_register(&ac->device->dev, &ac->charger);

	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	       acpi_device_name(device), acpi_device_bid(device),
	       ac->state ? "on-line" : "off-line");

      end:
	if (result) {
#ifdef CONFIG_ACPI_PROCFS_POWER
		acpi_ac_remove_fs(device);
#endif
		kfree(ac);
	}

	return result;
}

static int acpi_ac_resume(struct acpi_device *device)
{
	struct acpi_ac *ac;
	unsigned old_state;
	if (!device || !acpi_driver_data(device))
		return -EINVAL;
	ac = acpi_driver_data(device);
	old_state = ac->state;
	if (acpi_ac_get_state(ac))
		return 0;
	if (old_state != ac->state)
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	return 0;
}

static int acpi_ac_remove(struct acpi_device *device, int type)
{
	struct acpi_ac *ac = NULL;


	if (!device || !acpi_driver_data(device))
		return -EINVAL;

	ac = acpi_driver_data(device);

	if (ac->charger.dev)
		power_supply_unregister(&ac->charger);
#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_ac_remove_fs(device);
#endif

	kfree(ac);

	return 0;
}

static int __init acpi_ac_init(void)
{
	int result;

	if (acpi_disabled)
		return -ENODEV;

#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_ac_dir = acpi_lock_ac_dir();
	if (!acpi_ac_dir)
		return -ENODEV;
#endif

	result = acpi_bus_register_driver(&acpi_ac_driver);
	if (result < 0) {
#ifdef CONFIG_ACPI_PROCFS_POWER
		acpi_unlock_ac_dir(acpi_ac_dir);
#endif
		return -ENODEV;
	}

	return 0;
}

static void __exit acpi_ac_exit(void)
{

	acpi_bus_unregister_driver(&acpi_ac_driver);

#ifdef CONFIG_ACPI_PROCFS_POWER
	acpi_unlock_ac_dir(acpi_ac_dir);
#endif

	return;
}

module_init(acpi_ac_init);
module_exit(acpi_ac_exit);
Commit	Line	Data
	1	/*
	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/slab.h>
	29	#include <linux/init.h>
	30	#include <linux/types.h>
	31	#ifdef CONFIG_ACPI_PROCFS_POWER
	32	#include <linux/proc_fs.h>
	33	#include <linux/seq_file.h>
	34	#endif
	35	#include <linux/power_supply.h>
	36	#include <acpi/acpi_bus.h>
	37	#include <acpi/acpi_drivers.h>
	38
	39	#define PREFIX "ACPI: "
	40
	41	#define ACPI_AC_CLASS "ac_adapter"
	42	#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
	50	ACPI_MODULE_NAME("ac");
	51
	52	MODULE_AUTHOR("Paul Diefenbaugh");
	53	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
	54	MODULE_LICENSE("GPL");
	55
	56	#ifdef CONFIG_ACPI_PROCFS_POWER
	57	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
	58	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
	59	static int acpi_ac_open_fs(struct inode inode, struct file file);
	60	#endif
	61
	62	static int acpi_ac_add(struct acpi_device *device);
	63	static int acpi_ac_remove(struct acpi_device *device, int type);
	64	static int acpi_ac_resume(struct acpi_device *device);
	65	static void acpi_ac_notify(struct acpi_device *device, u32 event);
	66
	67	static const struct acpi_device_id ac_device_ids[] = {
	68	{"ACPI0003", 0},
	69	{"", 0},
	70	};
	71	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	72
	73	static struct acpi_driver acpi_ac_driver = {
	74	.name = "ac",
	75	.class = ACPI_AC_CLASS,
	76	.ids = ac_device_ids,
	77	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	78	.ops = {
	79	.add = acpi_ac_add,
	80	.remove = acpi_ac_remove,
	81	.resume = acpi_ac_resume,
	82	.notify = acpi_ac_notify,
	83	},
	84	};
	85
	86	struct acpi_ac {
	87	struct power_supply charger;
	88	struct acpi_device * device;
	89	unsigned long long state;
	90	};
	91
	92	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
	93
	94	#ifdef CONFIG_ACPI_PROCFS_POWER
	95	static const struct file_operations acpi_ac_fops = {
	96	.owner = THIS_MODULE,
	97	.open = acpi_ac_open_fs,
	98	.read = seq_read,
	99	.llseek = seq_lseek,
	100	.release = single_release,
	101	};
	102	#endif
	103	static 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
	118	static enum power_supply_property ac_props[] = {
	119	POWER_SUPPLY_PROP_ONLINE,
	120	};
	121	/* --------------------------------------------------------------------------
	122	AC Adapter Management
	123	-------------------------------------------------------------------------- */
	124
	125	static int acpi_ac_get_state(struct acpi_ac *ac)
	126	{
	127	acpi_status status = AE_OK;
	128
	129
	130	if (!ac)
	131	return -EINVAL;
	132
	133	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
	134	if (ACPI_FAILURE(status)) {
	135	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
	136	ac->state = ACPI_AC_STATUS_UNKNOWN;
	137	return -ENODEV;
	138	}
	139
	140	return 0;
	141	}
	142
	143	#ifdef CONFIG_ACPI_PROCFS_POWER
	144	/* --------------------------------------------------------------------------
	145	FS Interface (/proc)
	146	-------------------------------------------------------------------------- */
	147
	148	static struct proc_dir_entry *acpi_ac_dir;
	149
	150	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	151	{
	152	struct acpi_ac *ac = seq->private;
	153
	154
	155	if (!ac)
	156	return 0;
	157
	158	if (acpi_ac_get_state(ac)) {
	159	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
	160	return 0;
	161	}
	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
	176	return 0;
	177	}
	178
	179	static 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
	184	static int acpi_ac_add_fs(struct acpi_device *device)
	185	{
	186	struct proc_dir_entry *entry = NULL;
	187
	188
	189	if (!acpi_device_dir(device)) {
	190	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
	191	acpi_ac_dir);
	192	if (!acpi_device_dir(device))
	193	return -ENODEV;
	194	}
	195
	196	/* 'state' [R] */
	197	entry = proc_create_data(ACPI_AC_FILE_STATE,
	198	S_IRUGO, acpi_device_dir(device),
	199	&acpi_ac_fops, acpi_driver_data(device));
	200	if (!entry)
	201	return -ENODEV;
	202	return 0;
	203	}
	204
	205	static int acpi_ac_remove_fs(struct acpi_device *device)
	206	{
	207
	208	if (acpi_device_dir(device)) {
	209	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
	210
	211	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	212	acpi_device_dir(device) = NULL;
	213	}
	214
	215	return 0;
	216	}
	217	#endif
	218
	219	/* --------------------------------------------------------------------------
	220	Driver Model
	221	-------------------------------------------------------------------------- */
	222
	223	static void acpi_ac_notify(struct acpi_device *device, u32 event)
	224	{
	225	struct acpi_ac *ac = acpi_driver_data(device);
	226
	227
	228	if (!ac)
	229	return;
	230
	231	switch (event) {
	232	default:
	233	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	234	"Unsupported event [0x%x]\n", event));
	235	case ACPI_AC_NOTIFY_STATUS:
	236	case ACPI_NOTIFY_BUS_CHECK:
	237	case ACPI_NOTIFY_DEVICE_CHECK:
	238	acpi_ac_get_state(ac);
	239	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
	240	acpi_bus_generate_netlink_event(device->pnp.device_class,
	241	dev_name(&device->dev), event,
	242	(u32) ac->state);
	243	acpi_notifier_call_chain(device, event, (u32) ac->state);
	244	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	245	}
	246
	247	return;
	248	}
	249
	250	static int acpi_ac_add(struct acpi_device *device)
	251	{
	252	int result = 0;
	253	struct acpi_ac *ac = NULL;
	254
	255
	256	if (!device)
	257	return -EINVAL;
	258
	259	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
	260	if (!ac)
	261	return -ENOMEM;
	262
	263	ac->device = device;
	264	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	265	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	266	device->driver_data = ac;
	267
	268	result = acpi_ac_get_state(ac);
	269	if (result)
	270	goto end;
	271
	272	#ifdef CONFIG_ACPI_PROCFS_POWER
	273	result = acpi_ac_add_fs(device);
	274	#endif
	275	if (result)
	276	goto end;
	277	ac->charger.name = acpi_device_bid(device);
	278	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	279	ac->charger.properties = ac_props;
	280	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	281	ac->charger.get_property = get_ac_property;
	282	power_supply_register(&ac->device->dev, &ac->charger);
	283
	284	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	285	acpi_device_name(device), acpi_device_bid(device),
	286	ac->state ? "on-line" : "off-line");
	287
	288	end:
	289	if (result) {
	290	#ifdef CONFIG_ACPI_PROCFS_POWER
	291	acpi_ac_remove_fs(device);
	292	#endif
	293	kfree(ac);
	294	}
	295
	296	return result;
	297	}
	298
	299	static int acpi_ac_resume(struct acpi_device *device)
	300	{
	301	struct acpi_ac *ac;
	302	unsigned old_state;
	303	if (!device \|\| !acpi_driver_data(device))
	304	return -EINVAL;
	305	ac = acpi_driver_data(device);
	306	old_state = ac->state;
	307	if (acpi_ac_get_state(ac))
	308	return 0;
	309	if (old_state != ac->state)
	310	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
	311	return 0;
	312	}
	313
	314	static int acpi_ac_remove(struct acpi_device *device, int type)
	315	{
	316	struct acpi_ac *ac = NULL;
	317
	318
	319	if (!device \|\| !acpi_driver_data(device))
	320	return -EINVAL;
	321
	322	ac = acpi_driver_data(device);
	323
	324	if (ac->charger.dev)
	325	power_supply_unregister(&ac->charger);
	326	#ifdef CONFIG_ACPI_PROCFS_POWER
	327	acpi_ac_remove_fs(device);
	328	#endif
	329
	330	kfree(ac);
	331
	332	return 0;
	333	}
	334
	335	static int __init acpi_ac_init(void)
	336	{
	337	int result;
	338
	339	if (acpi_disabled)
	340	return -ENODEV;
	341
	342	#ifdef CONFIG_ACPI_PROCFS_POWER
	343	acpi_ac_dir = acpi_lock_ac_dir();
	344	if (!acpi_ac_dir)
	345	return -ENODEV;
	346	#endif
	347
	348	result = acpi_bus_register_driver(&acpi_ac_driver);
	349	if (result < 0) {
	350	#ifdef CONFIG_ACPI_PROCFS_POWER
	351	acpi_unlock_ac_dir(acpi_ac_dir);
	352	#endif
	353	return -ENODEV;
	354	}
	355
	356	return 0;
	357	}
	358
	359	static void __exit acpi_ac_exit(void)
	360	{
	361
	362	acpi_bus_unregister_driver(&acpi_ac_driver);
	363
	364	#ifdef CONFIG_ACPI_PROCFS_POWER
	365	acpi_unlock_ac_dir(acpi_ac_dir);
	366	#endif
	367
	368	return;
	369	}
	370
	371	module_init(acpi_ac_init);
	372	module_exit(acpi_ac_exit);