[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/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>

#define ACPI_AC_COMPONENT		0x00020000
#define ACPI_AC_CLASS			"ac_adapter"
#define ACPI_AC_HID 			"ACPI0003"
#define ACPI_AC_DRIVER_NAME		"ACPI AC Adapter Driver"
#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("acpi_ac")

    MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION(ACPI_AC_DRIVER_NAME);
MODULE_LICENSE("GPL");

static int acpi_ac_add(struct acpi_device *device);
static int acpi_ac_remove(struct acpi_device *device, int type);
static int acpi_ac_open_fs(struct inode *inode, struct file *file);

static struct acpi_driver acpi_ac_driver = {
	.name = ACPI_AC_DRIVER_NAME,
	.class = ACPI_AC_CLASS,
	.ids = ACPI_AC_HID,
	.ops = {
		.add = acpi_ac_add,
		.remove = acpi_ac_remove,
		},
};

struct acpi_ac {
	acpi_handle handle;
	unsigned long state;
};

static struct file_operations acpi_ac_fops = {
	.open = acpi_ac_open_fs,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

/* --------------------------------------------------------------------------
                               AC Adapter Management
   -------------------------------------------------------------------------- */

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

	ACPI_FUNCTION_TRACE("acpi_ac_get_state");

	if (!ac)
		return_VALUE(-EINVAL);

	status = acpi_evaluate_integer(ac->handle, "_PSR", NULL, &ac->state);
	if (ACPI_FAILURE(status)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Error reading AC Adapter state\n"));
		ac->state = ACPI_AC_STATUS_UNKNOWN;
		return_VALUE(-ENODEV);
	}

	return_VALUE(0);
}

/* --------------------------------------------------------------------------
                              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 = (struct acpi_ac *)seq->private;

	ACPI_FUNCTION_TRACE("acpi_ac_seq_show");

	if (!ac)
		return_VALUE(0);

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

	ACPI_FUNCTION_TRACE("acpi_ac_add_fs");

	if (!acpi_device_dir(device)) {
		acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
						     acpi_ac_dir);
		if (!acpi_device_dir(device))
			return_VALUE(-ENODEV);
		acpi_device_dir(device)->owner = THIS_MODULE;
	}

	/* 'state' [R] */
	entry = create_proc_entry(ACPI_AC_FILE_STATE,
				  S_IRUGO, acpi_device_dir(device));
	if (!entry)
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Unable to create '%s' fs entry\n",
				  ACPI_AC_FILE_STATE));
	else {
		entry->proc_fops = &acpi_ac_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

	return_VALUE(0);
}

static int acpi_ac_remove_fs(struct acpi_device *device)
{
	ACPI_FUNCTION_TRACE("acpi_ac_remove_fs");

	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_VALUE(0);
}

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

static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
{
	struct acpi_ac *ac = (struct acpi_ac *)data;
	struct acpi_device *device = NULL;

	ACPI_FUNCTION_TRACE("acpi_ac_notify");

	if (!ac)
		return_VOID;

	if (acpi_bus_get_device(ac->handle, &device))
		return_VOID;

	switch (event) {
	case ACPI_AC_NOTIFY_STATUS:
		acpi_ac_get_state(ac);
		acpi_bus_generate_event(device, event, (u32) ac->state);
		break;
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
		break;
	}

	return_VOID;
}

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

	ACPI_FUNCTION_TRACE("acpi_ac_add");

	if (!device)
		return_VALUE(-EINVAL);

	ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL);
	if (!ac)
		return_VALUE(-ENOMEM);
	memset(ac, 0, sizeof(struct acpi_ac));

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

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

	result = acpi_ac_add_fs(device);
	if (result)
		goto end;

	status = acpi_install_notify_handler(ac->handle,
					     ACPI_DEVICE_NOTIFY, acpi_ac_notify,
					     ac);
	if (ACPI_FAILURE(status)) {
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Error installing notify handler\n"));
		result = -ENODEV;
		goto end;
	}

	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) {
		acpi_ac_remove_fs(device);
		kfree(ac);
	}

	return_VALUE(result);
}

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

	ACPI_FUNCTION_TRACE("acpi_ac_remove");

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

	ac = (struct acpi_ac *)acpi_driver_data(device);

	status = acpi_remove_notify_handler(ac->handle,
					    ACPI_DEVICE_NOTIFY, acpi_ac_notify);
	if (ACPI_FAILURE(status))
		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
				  "Error removing notify handler\n"));

	acpi_ac_remove_fs(device);

	kfree(ac);

	return_VALUE(0);
}

static int __init acpi_ac_init(void)
{
	int result = 0;

	ACPI_FUNCTION_TRACE("acpi_ac_init");

	acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
	if (!acpi_ac_dir)
		return_VALUE(-ENODEV);
	acpi_ac_dir->owner = THIS_MODULE;

	result = acpi_bus_register_driver(&acpi_ac_driver);
	if (result < 0) {
		remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
		return_VALUE(-ENODEV);
	}

	return_VALUE(0);
}

static void __exit acpi_ac_exit(void)
{
	ACPI_FUNCTION_TRACE("acpi_ac_exit");

	acpi_bus_unregister_driver(&acpi_ac_driver);

	remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);

	return_VOID;
}

module_init(acpi_ac_init);
module_exit(acpi_ac_exit);
Commit	Line	Data
1da177e4 LT	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/init.h>
	29	#include <linux/types.h>
	30	#include <linux/proc_fs.h>
	31	#include <linux/seq_file.h>
	32	#include <acpi/acpi_bus.h>
	33	#include <acpi/acpi_drivers.h>
	34
1da177e4 LT	35	#define ACPI_AC_COMPONENT 0x00020000
	36	#define ACPI_AC_CLASS "ac_adapter"
	37	#define ACPI_AC_HID "ACPI0003"
	38	#define ACPI_AC_DRIVER_NAME "ACPI AC Adapter Driver"
	39	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	40	#define ACPI_AC_FILE_STATE "state"
	41	#define ACPI_AC_NOTIFY_STATUS 0x80
	42	#define ACPI_AC_STATUS_OFFLINE 0x00
	43	#define ACPI_AC_STATUS_ONLINE 0x01
	44	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	45
	46	#define _COMPONENT ACPI_AC_COMPONENT
4be44fcd	47	ACPI_MODULE_NAME("acpi_ac")
1da177e4	48
4be44fcd	49	MODULE_AUTHOR("Paul Diefenbaugh");
1da177e4 LT	50	MODULE_DESCRIPTION(ACPI_AC_DRIVER_NAME);
	51	MODULE_LICENSE("GPL");
	52
4be44fcd LB	53	static int acpi_ac_add(struct acpi_device *device);
4be44fcd LB	54	static int acpi_ac_remove(struct acpi_device *device, int type);
1da177e4 LT	55	static int acpi_ac_open_fs(struct inode inode, struct file file);
	56
	57	static struct acpi_driver acpi_ac_driver = {
4be44fcd LB	58	.name = ACPI_AC_DRIVER_NAME,
	59	.class = ACPI_AC_CLASS,
	60	.ids = ACPI_AC_HID,
	61	.ops = {
	62	.add = acpi_ac_add,
	63	.remove = acpi_ac_remove,
	64	},
1da177e4 LT	65	};
	66
	67	struct acpi_ac {
4be44fcd LB	68	acpi_handle handle;
4be44fcd LB	69	unsigned long state;
1da177e4 LT	70	};
	71
	72	static struct file_operations acpi_ac_fops = {
4be44fcd LB	73	.open = acpi_ac_open_fs,
	74	.read = seq_read,
	75	.llseek = seq_lseek,
	76	.release = single_release,
1da177e4 LT	77	};
	78
	79	/* --------------------------------------------------------------------------
	80	AC Adapter Management
	81	-------------------------------------------------------------------------- */
	82
4be44fcd	83	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	84	{
4be44fcd	85	acpi_status status = AE_OK;
1da177e4 LT	86
	87	ACPI_FUNCTION_TRACE("acpi_ac_get_state");
	88
	89	if (!ac)
	90	return_VALUE(-EINVAL);
	91
	92	status = acpi_evaluate_integer(ac->handle, "_PSR", NULL, &ac->state);
	93	if (ACPI_FAILURE(status)) {
	94	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd	95	"Error reading AC Adapter state\n"));
1da177e4 LT	96	ac->state = ACPI_AC_STATUS_UNKNOWN;
	97	return_VALUE(-ENODEV);
	98	}
4be44fcd	99
1da177e4 LT	100	return_VALUE(0);
	101	}
	102
1da177e4 LT	103	/* --------------------------------------------------------------------------
	104	FS Interface (/proc)
	105	-------------------------------------------------------------------------- */
	106
4be44fcd	107	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	108
	109	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	110	{
4be44fcd	111	struct acpi_ac ac = (struct acpi_ac )seq->private;
1da177e4 LT	112
	113	ACPI_FUNCTION_TRACE("acpi_ac_seq_show");
	114
	115	if (!ac)
	116	return_VALUE(0);
	117
	118	if (acpi_ac_get_state(ac)) {
	119	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
	120	return_VALUE(0);
	121	}
	122
	123	seq_puts(seq, "state: ");
	124	switch (ac->state) {
	125	case ACPI_AC_STATUS_OFFLINE:
	126	seq_puts(seq, "off-line\n");
	127	break;
	128	case ACPI_AC_STATUS_ONLINE:
	129	seq_puts(seq, "on-line\n");
	130	break;
	131	default:
	132	seq_puts(seq, "unknown\n");
	133	break;
	134	}
	135
	136	return_VALUE(0);
	137	}
4be44fcd	138
1da177e4 LT	139	static int acpi_ac_open_fs(struct inode inode, struct file file)
	140	{
	141	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
	142	}
	143
4be44fcd	144	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	145	{
4be44fcd	146	struct proc_dir_entry *entry = NULL;
1da177e4 LT	147
	148	ACPI_FUNCTION_TRACE("acpi_ac_add_fs");
	149
	150	if (!acpi_device_dir(device)) {
	151	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	152	acpi_ac_dir);
1da177e4 LT	153	if (!acpi_device_dir(device))
	154	return_VALUE(-ENODEV);
	155	acpi_device_dir(device)->owner = THIS_MODULE;
	156	}
	157
	158	/* 'state' [R] */
	159	entry = create_proc_entry(ACPI_AC_FILE_STATE,
4be44fcd	160	S_IRUGO, acpi_device_dir(device));
1da177e4 LT	161	if (!entry)
1da177e4 LT	162	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd LB	163	"Unable to create '%s' fs entry\n",
4be44fcd LB	164	ACPI_AC_FILE_STATE));
1da177e4 LT	165	else {
	166	entry->proc_fops = &acpi_ac_fops;
	167	entry->data = acpi_driver_data(device);
	168	entry->owner = THIS_MODULE;
	169	}
	170
	171	return_VALUE(0);
	172	}
	173
4be44fcd	174	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4 LT	175	{
	176	ACPI_FUNCTION_TRACE("acpi_ac_remove_fs");
	177
	178	if (acpi_device_dir(device)) {
4be44fcd	179	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	180
	181	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	182	acpi_device_dir(device) = NULL;
	183	}
	184
	185	return_VALUE(0);
	186	}
	187
1da177e4 LT	188	/* --------------------------------------------------------------------------
	189	Driver Model
	190	-------------------------------------------------------------------------- */
	191
4be44fcd	192	static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
1da177e4	193	{
4be44fcd LB	194	struct acpi_ac ac = (struct acpi_ac )data;
4be44fcd LB	195	struct acpi_device *device = NULL;
1da177e4 LT	196
	197	ACPI_FUNCTION_TRACE("acpi_ac_notify");
	198
	199	if (!ac)
	200	return_VOID;
	201
	202	if (acpi_bus_get_device(ac->handle, &device))
	203	return_VOID;
	204
	205	switch (event) {
	206	case ACPI_AC_NOTIFY_STATUS:
	207	acpi_ac_get_state(ac);
	208	acpi_bus_generate_event(device, event, (u32) ac->state);
	209	break;
	210	default:
	211	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	212	"Unsupported event [0x%x]\n", event));
1da177e4 LT	213	break;
	214	}
	215
	216	return_VOID;
	217	}
	218
4be44fcd	219	static int acpi_ac_add(struct acpi_device *device)
1da177e4	220	{
4be44fcd LB	221	int result = 0;
	222	acpi_status status = AE_OK;
	223	struct acpi_ac *ac = NULL;
1da177e4 LT	224
	225	ACPI_FUNCTION_TRACE("acpi_ac_add");
	226
	227	if (!device)
	228	return_VALUE(-EINVAL);
	229
	230	ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL);
	231	if (!ac)
	232	return_VALUE(-ENOMEM);
	233	memset(ac, 0, sizeof(struct acpi_ac));
	234
	235	ac->handle = device->handle;
	236	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	237	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	238	acpi_driver_data(device) = ac;
	239
	240	result = acpi_ac_get_state(ac);
	241	if (result)
	242	goto end;
	243
	244	result = acpi_ac_add_fs(device);
	245	if (result)
	246	goto end;
	247
	248	status = acpi_install_notify_handler(ac->handle,
4be44fcd LB	249	ACPI_DEVICE_NOTIFY, acpi_ac_notify,
4be44fcd LB	250	ac);
1da177e4 LT	251	if (ACPI_FAILURE(status)) {
1da177e4 LT	252	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd	253	"Error installing notify handler\n"));
1da177e4 LT	254	result = -ENODEV;
	255	goto end;
	256	}
	257
4be44fcd LB	258	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	259	acpi_device_name(device), acpi_device_bid(device),
	260	ac->state ? "on-line" : "off-line");
1da177e4	261
4be44fcd	262	end:
1da177e4 LT	263	if (result) {
	264	acpi_ac_remove_fs(device);
	265	kfree(ac);
	266	}
	267
	268	return_VALUE(result);
	269	}
	270
4be44fcd	271	static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4	272	{
4be44fcd LB	273	acpi_status status = AE_OK;
4be44fcd LB	274	struct acpi_ac *ac = NULL;
1da177e4 LT	275
	276	ACPI_FUNCTION_TRACE("acpi_ac_remove");
	277
	278	if (!device \|\| !acpi_driver_data(device))
	279	return_VALUE(-EINVAL);
	280
4be44fcd	281	ac = (struct acpi_ac *)acpi_driver_data(device);
1da177e4 LT	282
1da177e4 LT	283	status = acpi_remove_notify_handler(ac->handle,
4be44fcd	284	ACPI_DEVICE_NOTIFY, acpi_ac_notify);
1da177e4 LT	285	if (ACPI_FAILURE(status))
1da177e4 LT	286	ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
4be44fcd	287	"Error removing notify handler\n"));
1da177e4 LT	288
	289	acpi_ac_remove_fs(device);
	290
	291	kfree(ac);
	292
	293	return_VALUE(0);
	294	}
	295
4be44fcd	296	static int __init acpi_ac_init(void)
1da177e4	297	{
4be44fcd	298	int result = 0;
1da177e4 LT	299
	300	ACPI_FUNCTION_TRACE("acpi_ac_init");
	301
	302	acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
	303	if (!acpi_ac_dir)
	304	return_VALUE(-ENODEV);
	305	acpi_ac_dir->owner = THIS_MODULE;
	306
	307	result = acpi_bus_register_driver(&acpi_ac_driver);
	308	if (result < 0) {
	309	remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
	310	return_VALUE(-ENODEV);
	311	}
	312
	313	return_VALUE(0);
	314	}
	315
4be44fcd	316	static void __exit acpi_ac_exit(void)
1da177e4 LT	317	{
	318	ACPI_FUNCTION_TRACE("acpi_ac_exit");
	319
	320	acpi_bus_unregister_driver(&acpi_ac_driver);
	321
	322	remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
	323
	324	return_VOID;
	325	}
	326
1da177e4 LT	327	module_init(acpi_ac_init);
1da177e4 LT	328	module_exit(acpi_ac_exit);