[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>
#ifdef CONFIG_ACPI_PROCFS
#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 ACPI_AC_COMPONENT		0x00020000
#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
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);

const static 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,
	.ops = {
		.add = acpi_ac_add,
		.remove = acpi_ac_remove,
		.resume = acpi_ac_resume,
		},
};

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

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

#ifdef CONFIG_ACPI_PROCFS
static const struct file_operations acpi_ac_fops = {
	.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
/* --------------------------------------------------------------------------
                              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;
		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)
		return -ENODEV;
	else {
		entry->proc_fops = &acpi_ac_fops;
		entry->data = acpi_driver_data(device);
		entry->owner = THIS_MODULE;
	}

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


	if (!ac)
		return;

	device = ac->device;
	switch (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,
						  device->dev.bus_id, event,
						  (u32) ac->state);
		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
		break;
	default:
		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
				  "Unsupported event [0x%x]\n", event));
		break;
	}

	return;
}

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

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

#ifdef CONFIG_ACPI_PROCFS
	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);
	status = acpi_install_notify_handler(device->handle,
					     ACPI_ALL_NOTIFY, acpi_ac_notify,
					     ac);
	if (ACPI_FAILURE(status)) {
		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) {
#ifdef CONFIG_ACPI_PROCFS
		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)
{
	acpi_status status = AE_OK;
	struct acpi_ac *ac = NULL;


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

	ac = acpi_driver_data(device);

	status = acpi_remove_notify_handler(device->handle,
					    ACPI_ALL_NOTIFY, acpi_ac_notify);
	if (ac->charger.dev)
		power_supply_unregister(&ac->charger);
#ifdef CONFIG_ACPI_PROCFS
	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
	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
		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
	acpi_unlock_ac_dir(acpi_ac_dir);
#endif

	return;
}

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>
8a246ee4	30	#ifdef CONFIG_ACPI_PROCFS
1da177e4 LT	31	#include <linux/proc_fs.h>
1da177e4 LT	32	#include <linux/seq_file.h>
8a246ee4	33	#endif
d5b4a3d0	34	#include <linux/power_supply.h>
1da177e4 LT	35	#include <acpi/acpi_bus.h>
	36	#include <acpi/acpi_drivers.h>
	37
1da177e4 LT	38	#define ACPI_AC_COMPONENT 0x00020000
1da177e4 LT	39	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	40	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	41	#define ACPI_AC_FILE_STATE "state"
	42	#define ACPI_AC_NOTIFY_STATUS 0x80
	43	#define ACPI_AC_STATUS_OFFLINE 0x00
	44	#define ACPI_AC_STATUS_ONLINE 0x01
	45	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	46
	47	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	48	ACPI_MODULE_NAME("ac");
1da177e4	49
f52fd66d	50	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	51	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	52	MODULE_LICENSE("GPL");
1da177e4 LT	53
8a246ee4	54	#ifdef CONFIG_ACPI_PROCFS
3f86b832 RT	55	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
3f86b832 RT	56	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
8a246ee4 AB	57	static int acpi_ac_open_fs(struct inode inode, struct file file);
8a246ee4 AB	58	#endif
3f86b832	59
4be44fcd LB	60	static int acpi_ac_add(struct acpi_device *device);
4be44fcd LB	61	static int acpi_ac_remove(struct acpi_device *device, int type);
5bfeca31	62	static int acpi_ac_resume(struct acpi_device *device);
1da177e4	63
1ba90e3a TR	64	const static struct acpi_device_id ac_device_ids[] = {
	65	{"ACPI0003", 0},
	66	{"", 0},
	67	};
	68	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	69
1da177e4	70	static struct acpi_driver acpi_ac_driver = {
c2b6705b	71	.name = "ac",
4be44fcd	72	.class = ACPI_AC_CLASS,
1ba90e3a	73	.ids = ac_device_ids,
4be44fcd LB	74	.ops = {
	75	.add = acpi_ac_add,
	76	.remove = acpi_ac_remove,
5bfeca31	77	.resume = acpi_ac_resume,
4be44fcd	78	},
1da177e4 LT	79	};
	80
	81	struct acpi_ac {
d5b4a3d0	82	struct power_supply charger;
af96179a	83	struct acpi_device * device;
4be44fcd	84	unsigned long state;
1da177e4 LT	85	};
1da177e4 LT	86
d5b4a3d0 AS	87	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
d5b4a3d0 AS	88
8a246ee4	89	#ifdef CONFIG_ACPI_PROCFS
d7508032	90	static const struct file_operations acpi_ac_fops = {
4be44fcd LB	91	.open = acpi_ac_open_fs,
	92	.read = seq_read,
	93	.llseek = seq_lseek,
	94	.release = single_release,
1da177e4	95	};
8a246ee4 AB	96	#endif
8a246ee4 AB	97
d5b4a3d0 AS	98	static int get_ac_property(struct power_supply *psy,
	99	enum power_supply_property psp,
	100	union power_supply_propval *val)
	101	{
	102	struct acpi_ac *ac = to_acpi_ac(psy);
	103	switch (psp) {
	104	case POWER_SUPPLY_PROP_ONLINE:
	105	val->intval = ac->state;
	106	break;
	107	default:
	108	return -EINVAL;
	109	}
	110	return 0;
	111	}
	112
	113	static enum power_supply_property ac_props[] = {
	114	POWER_SUPPLY_PROP_ONLINE,
	115	};
1da177e4 LT	116
	117	/* --------------------------------------------------------------------------
	118	AC Adapter Management
	119	-------------------------------------------------------------------------- */
	120
4be44fcd	121	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	122	{
4be44fcd	123	acpi_status status = AE_OK;
1da177e4	124
1da177e4 LT	125
1da177e4 LT	126	if (!ac)
d550d98d	127	return -EINVAL;
1da177e4	128
a6ba5ebe	129	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	130	if (ACPI_FAILURE(status)) {
a6fc6720	131	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	132	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	133	return -ENODEV;
1da177e4	134	}
4be44fcd	135
d550d98d	136	return 0;
1da177e4 LT	137	}
1da177e4 LT	138
8a246ee4	139	#ifdef CONFIG_ACPI_PROCFS
1da177e4 LT	140	/* --------------------------------------------------------------------------
	141	FS Interface (/proc)
	142	-------------------------------------------------------------------------- */
	143
4be44fcd	144	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	145
	146	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	147	{
50dd0969	148	struct acpi_ac *ac = seq->private;
1da177e4	149
1da177e4 LT	150
1da177e4 LT	151	if (!ac)
d550d98d	152	return 0;
1da177e4 LT	153
	154	if (acpi_ac_get_state(ac)) {
	155	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	156	return 0;
1da177e4 LT	157	}
	158
	159	seq_puts(seq, "state: ");
	160	switch (ac->state) {
	161	case ACPI_AC_STATUS_OFFLINE:
	162	seq_puts(seq, "off-line\n");
	163	break;
	164	case ACPI_AC_STATUS_ONLINE:
	165	seq_puts(seq, "on-line\n");
	166	break;
	167	default:
	168	seq_puts(seq, "unknown\n");
	169	break;
	170	}
	171
d550d98d	172	return 0;
1da177e4	173	}
4be44fcd	174
1da177e4 LT	175	static int acpi_ac_open_fs(struct inode inode, struct file file)
	176	{
	177	return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
	178	}
	179
4be44fcd	180	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	181	{
4be44fcd	182	struct proc_dir_entry *entry = NULL;
1da177e4	183
1da177e4 LT	184
	185	if (!acpi_device_dir(device)) {
	186	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	187	acpi_ac_dir);
1da177e4	188	if (!acpi_device_dir(device))
d550d98d	189	return -ENODEV;
1da177e4 LT	190	acpi_device_dir(device)->owner = THIS_MODULE;
	191	}
	192
	193	/* 'state' [R] */
	194	entry = create_proc_entry(ACPI_AC_FILE_STATE,
4be44fcd	195	S_IRUGO, acpi_device_dir(device));
1da177e4	196	if (!entry)
d550d98d	197	return -ENODEV;
1da177e4 LT	198	else {
	199	entry->proc_fops = &acpi_ac_fops;
	200	entry->data = acpi_driver_data(device);
	201	entry->owner = THIS_MODULE;
	202	}
	203
d550d98d	204	return 0;
1da177e4 LT	205	}
1da177e4 LT	206
4be44fcd	207	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	208	{
1da177e4 LT	209
1da177e4 LT	210	if (acpi_device_dir(device)) {
4be44fcd	211	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	212
	213	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	214	acpi_device_dir(device) = NULL;
	215	}
	216
d550d98d	217	return 0;
1da177e4	218	}
8a246ee4	219	#endif
1da177e4	220
1da177e4 LT	221	/* --------------------------------------------------------------------------
	222	Driver Model
	223	-------------------------------------------------------------------------- */
	224
4be44fcd	225	static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
1da177e4	226	{
50dd0969	227	struct acpi_ac *ac = data;
4be44fcd	228	struct acpi_device *device = NULL;
1da177e4	229
1da177e4 LT	230
1da177e4 LT	231	if (!ac)
d550d98d	232	return;
1da177e4	233
af96179a	234	device = ac->device;
1da177e4 LT	235	switch (event) {
1da177e4 LT	236	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	237	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	238	case ACPI_NOTIFY_DEVICE_CHECK:
1da177e4	239	acpi_ac_get_state(ac);
14e04fb3	240	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca ZR	241	acpi_bus_generate_netlink_event(device->pnp.device_class,
	242	device->dev.bus_id, event,
	243	(u32) ac->state);
d5b4a3d0	244	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
1da177e4 LT	245	break;
	246	default:
	247	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd	248	"Unsupported event [0x%x]\n", event));
1da177e4 LT	249	break;
	250	}
	251
d550d98d	252	return;
1da177e4 LT	253	}
1da177e4 LT	254
4be44fcd	255	static int acpi_ac_add(struct acpi_device *device)
1da177e4	256	{
4be44fcd LB	257	int result = 0;
	258	acpi_status status = AE_OK;
	259	struct acpi_ac *ac = NULL;
1da177e4	260
1da177e4 LT	261
1da177e4 LT	262	if (!device)
d550d98d	263	return -EINVAL;
1da177e4	264
36bcbec7	265	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	266	if (!ac)
d550d98d	267	return -ENOMEM;
1da177e4	268
af96179a	269	ac->device = device;
1da177e4 LT	270	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
8a246ee4	278	#ifdef CONFIG_ACPI_PROCFS
1da177e4	279	result = acpi_ac_add_fs(device);
8a246ee4	280	#endif
1da177e4 LT	281	if (result)
1da177e4 LT	282	goto end;
d5b4a3d0 AS	283	ac->charger.name = acpi_device_bid(device);
	284	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
	285	ac->charger.properties = ac_props;
	286	ac->charger.num_properties = ARRAY_SIZE(ac_props);
	287	ac->charger.get_property = get_ac_property;
	288	power_supply_register(&ac->device->dev, &ac->charger);
a6ba5ebe	289	status = acpi_install_notify_handler(device->handle,
03d78252	290	ACPI_ALL_NOTIFY, acpi_ac_notify,
4be44fcd	291	ac);
1da177e4	292	if (ACPI_FAILURE(status)) {
1da177e4 LT	293	result = -ENODEV;
	294	goto end;
	295	}
	296
4be44fcd LB	297	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
	298	acpi_device_name(device), acpi_device_bid(device),
	299	ac->state ? "on-line" : "off-line");
1da177e4	300
4be44fcd	301	end:
1da177e4	302	if (result) {
8a246ee4	303	#ifdef CONFIG_ACPI_PROCFS
1da177e4	304	acpi_ac_remove_fs(device);
8a246ee4	305	#endif
1da177e4 LT	306	kfree(ac);
	307	}
	308
d550d98d	309	return result;
1da177e4 LT	310	}
1da177e4 LT	311
5bfeca31 AS	312	static 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
4be44fcd	327	static int acpi_ac_remove(struct acpi_device *device, int type)
1da177e4	328	{
4be44fcd LB	329	acpi_status status = AE_OK;
4be44fcd LB	330	struct acpi_ac *ac = NULL;
1da177e4	331
1da177e4 LT	332
1da177e4 LT	333	if (!device \|\| !acpi_driver_data(device))
d550d98d	334	return -EINVAL;
1da177e4	335
50dd0969	336	ac = acpi_driver_data(device);
1da177e4	337
a6ba5ebe	338	status = acpi_remove_notify_handler(device->handle,
03d78252	339	ACPI_ALL_NOTIFY, acpi_ac_notify);
d5b4a3d0 AS	340	if (ac->charger.dev)
d5b4a3d0 AS	341	power_supply_unregister(&ac->charger);
8a246ee4	342	#ifdef CONFIG_ACPI_PROCFS
1da177e4	343	acpi_ac_remove_fs(device);
8a246ee4	344	#endif
1da177e4 LT	345
	346	kfree(ac);
	347
d550d98d	348	return 0;
1da177e4 LT	349	}
1da177e4 LT	350
4be44fcd	351	static int __init acpi_ac_init(void)
1da177e4	352	{
3f86b832	353	int result;
1da177e4	354
4d8316d5 PM	355	if (acpi_disabled)
4d8316d5 PM	356	return -ENODEV;
1da177e4	357
8a246ee4	358	#ifdef CONFIG_ACPI_PROCFS
3f86b832	359	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	360	if (!acpi_ac_dir)
d550d98d	361	return -ENODEV;
8a246ee4	362	#endif
1da177e4 LT	363
	364	result = acpi_bus_register_driver(&acpi_ac_driver);
	365	if (result < 0) {
8a246ee4	366	#ifdef CONFIG_ACPI_PROCFS
3f86b832	367	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	368	#endif
d550d98d	369	return -ENODEV;
1da177e4 LT	370	}
1da177e4 LT	371
d550d98d	372	return 0;
1da177e4 LT	373	}
1da177e4 LT	374
4be44fcd	375	static void __exit acpi_ac_exit(void)
1da177e4	376	{
1da177e4 LT	377
	378	acpi_bus_unregister_driver(&acpi_ac_driver);
	379
8a246ee4	380	#ifdef CONFIG_ACPI_PROCFS
3f86b832	381	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	382	#endif
1da177e4	383
d550d98d	384	return;
1da177e4 LT	385	}
1da177e4 LT	386
1da177e4 LT	387	module_init(acpi_ac_init);
1da177e4 LT	388	module_exit(acpi_ac_exit);