[GitHub/mt8127/android_kernel_alcatel_ttab.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

/* --------------------------------------------------------------------------
                               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;
}

/* --------------------------------------------------------------------------
                            sysfs I/F
   -------------------------------------------------------------------------- */
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);

	if (!ac)
		return -ENODEV;

	if (acpi_ac_get_state(ac))
		return -ENODEV;

	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,
};

#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;

	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
			" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
	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
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>
5a0e3ad6	28	#include <linux/slab.h>
1da177e4 LT	29	#include <linux/init.h>
1da177e4 LT	30	#include <linux/types.h>
fdcedbba	31	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	32	#include <linux/proc_fs.h>
1da177e4 LT	33	#include <linux/seq_file.h>
8a246ee4	34	#endif
d5b4a3d0	35	#include <linux/power_supply.h>
1da177e4 LT	36	#include <acpi/acpi_bus.h>
	37	#include <acpi/acpi_drivers.h>
	38
a192a958 LB	39	#define PREFIX "ACPI: "
a192a958 LB	40
1da177e4	41	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	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
f52fd66d	50	ACPI_MODULE_NAME("ac");
1da177e4	51
f52fd66d	52	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	53	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	54	MODULE_LICENSE("GPL");
1da177e4 LT	55
fdcedbba	56	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 RT	57	extern struct proc_dir_entry *acpi_lock_ac_dir(void);
3f86b832 RT	58	extern void acpi_unlock_ac_dir(struct proc_dir_entry acpi_ac_dir);
8a246ee4 AB	59	static int acpi_ac_open_fs(struct inode inode, struct file file);
8a246ee4 AB	60	#endif
3f86b832	61
4be44fcd LB	62	static int acpi_ac_add(struct acpi_device *device);
4be44fcd LB	63	static int acpi_ac_remove(struct acpi_device *device, int type);
5bfeca31	64	static int acpi_ac_resume(struct acpi_device *device);
48fe1127	65	static void acpi_ac_notify(struct acpi_device *device, u32 event);
1da177e4	66
b299c22c	67	static const struct acpi_device_id ac_device_ids[] = {
1ba90e3a TR	68	{"ACPI0003", 0},
	69	{"", 0},
	70	};
	71	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	72
1da177e4	73	static struct acpi_driver acpi_ac_driver = {
c2b6705b	74	.name = "ac",
4be44fcd	75	.class = ACPI_AC_CLASS,
1ba90e3a	76	.ids = ac_device_ids,
48fe1127	77	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
4be44fcd LB	78	.ops = {
	79	.add = acpi_ac_add,
	80	.remove = acpi_ac_remove,
5bfeca31	81	.resume = acpi_ac_resume,
48fe1127	82	.notify = acpi_ac_notify,
4be44fcd	83	},
1da177e4 LT	84	};
	85
	86	struct acpi_ac {
d5b4a3d0	87	struct power_supply charger;
af96179a	88	struct acpi_device * device;
27663c58	89	unsigned long long state;
1da177e4 LT	90	};
1da177e4 LT	91
d5b4a3d0 AS	92	#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
d5b4a3d0 AS	93
fdcedbba	94	#ifdef CONFIG_ACPI_PROCFS_POWER
d7508032	95	static const struct file_operations acpi_ac_fops = {
cf7acfab	96	.owner = THIS_MODULE,
4be44fcd LB	97	.open = acpi_ac_open_fs,
	98	.read = seq_read,
	99	.llseek = seq_lseek,
	100	.release = single_release,
1da177e4	101	};
8a246ee4	102	#endif
d5b4a3d0	103
1da177e4 LT	104	/* --------------------------------------------------------------------------
	105	AC Adapter Management
	106	-------------------------------------------------------------------------- */
	107
4be44fcd	108	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	109	{
4be44fcd	110	acpi_status status = AE_OK;
1da177e4	111
1da177e4 LT	112
1da177e4 LT	113	if (!ac)
d550d98d	114	return -EINVAL;
1da177e4	115
a6ba5ebe	116	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
1da177e4	117	if (ACPI_FAILURE(status)) {
a6fc6720	118	ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
1da177e4	119	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	120	return -ENODEV;
1da177e4	121	}
4be44fcd	122
d550d98d	123	return 0;
1da177e4 LT	124	}
1da177e4 LT	125
3151dbb0 ZR	126	/* --------------------------------------------------------------------------
	127	sysfs I/F
	128	-------------------------------------------------------------------------- */
	129	static 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
	151	static enum power_supply_property ac_props[] = {
	152	POWER_SUPPLY_PROP_ONLINE,
	153	};
	154
fdcedbba	155	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 LT	156	/* --------------------------------------------------------------------------
	157	FS Interface (/proc)
	158	-------------------------------------------------------------------------- */
	159
4be44fcd	160	static struct proc_dir_entry *acpi_ac_dir;
1da177e4 LT	161
	162	static int acpi_ac_seq_show(struct seq_file seq, void offset)
	163	{
50dd0969	164	struct acpi_ac *ac = seq->private;
1da177e4	165
1da177e4 LT	166
1da177e4 LT	167	if (!ac)
d550d98d	168	return 0;
1da177e4 LT	169
	170	if (acpi_ac_get_state(ac)) {
	171	seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
d550d98d	172	return 0;
1da177e4 LT	173	}
	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
d550d98d	188	return 0;
1da177e4	189	}
4be44fcd	190
1da177e4 LT	191	static 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
4be44fcd	196	static int acpi_ac_add_fs(struct acpi_device *device)
1da177e4	197	{
4be44fcd	198	struct proc_dir_entry *entry = NULL;
1da177e4	199
6d855fcd ZR	200	printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
6d855fcd ZR	201	" please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
1da177e4 LT	202	if (!acpi_device_dir(device)) {
1da177e4 LT	203	acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd	204	acpi_ac_dir);
1da177e4	205	if (!acpi_device_dir(device))
d550d98d	206	return -ENODEV;
1da177e4 LT	207	}
	208
	209	/* 'state' [R] */
cf7acfab DL	210	entry = proc_create_data(ACPI_AC_FILE_STATE,
	211	S_IRUGO, acpi_device_dir(device),
	212	&acpi_ac_fops, acpi_driver_data(device));
1da177e4	213	if (!entry)
d550d98d	214	return -ENODEV;
d550d98d	215	return 0;
1da177e4 LT	216	}
1da177e4 LT	217
4be44fcd	218	static int acpi_ac_remove_fs(struct acpi_device *device)
1da177e4	219	{
1da177e4 LT	220
1da177e4 LT	221	if (acpi_device_dir(device)) {
4be44fcd	222	remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
1da177e4 LT	223
	224	remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
	225	acpi_device_dir(device) = NULL;
	226	}
	227
d550d98d	228	return 0;
1da177e4	229	}
8a246ee4	230	#endif
1da177e4	231
1da177e4 LT	232	/* --------------------------------------------------------------------------
	233	Driver Model
	234	-------------------------------------------------------------------------- */
	235
48fe1127	236	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	237	{
48fe1127	238	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4	239
1da177e4 LT	240
1da177e4 LT	241	if (!ac)
d550d98d	242	return;
1da177e4	243
1da177e4	244	switch (event) {
f163ff51 LB	245	default:
	246	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	247	"Unsupported event [0x%x]\n", event));
1da177e4	248	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	249	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	250	case ACPI_NOTIFY_DEVICE_CHECK:
1da177e4	251	acpi_ac_get_state(ac);
14e04fb3	252	acpi_bus_generate_proc_event(device, event, (u32) ac->state);
962ce8ca	253	acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d	254	dev_name(&device->dev), event,
962ce8ca	255	(u32) ac->state);
68b92b56	256	acpi_notifier_call_chain(device, event, (u32) ac->state);
d5b4a3d0	257	kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
1da177e4 LT	258	}
1da177e4 LT	259
d550d98d	260	return;
1da177e4 LT	261	}
1da177e4 LT	262
4be44fcd	263	static int acpi_ac_add(struct acpi_device *device)
1da177e4	264	{
4be44fcd	265	int result = 0;
4be44fcd	266	struct acpi_ac *ac = NULL;
1da177e4	267
1da177e4 LT	268
1da177e4 LT	269	if (!device)
d550d98d	270	return -EINVAL;
1da177e4	271
36bcbec7	272	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	273	if (!ac)
d550d98d	274	return -ENOMEM;
1da177e4	275
af96179a	276	ac->device = device;
1da177e4 LT	277	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
1da177e4 LT	278	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
db89b4f0	279	device->driver_data = ac;
1da177e4 LT	280
	281	result = acpi_ac_get_state(ac);
	282	if (result)
	283	goto end;
	284
fdcedbba	285	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	286	result = acpi_ac_add_fs(device);
8a246ee4	287	#endif
1da177e4 LT	288	if (result)
1da177e4 LT	289	goto end;
d5b4a3d0 AS	290	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);
1da177e4	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) {
fdcedbba	303	#ifdef CONFIG_ACPI_PROCFS_POWER
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	329	struct acpi_ac *ac = NULL;
1da177e4	330
1da177e4 LT	331
1da177e4 LT	332	if (!device \|\| !acpi_driver_data(device))
d550d98d	333	return -EINVAL;
1da177e4	334
50dd0969	335	ac = acpi_driver_data(device);
1da177e4	336
d5b4a3d0 AS	337	if (ac->charger.dev)
d5b4a3d0 AS	338	power_supply_unregister(&ac->charger);
fdcedbba	339	#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4	340	acpi_ac_remove_fs(device);
8a246ee4	341	#endif
1da177e4 LT	342
	343	kfree(ac);
	344
d550d98d	345	return 0;
1da177e4 LT	346	}
1da177e4 LT	347
4be44fcd	348	static int __init acpi_ac_init(void)
1da177e4	349	{
3f86b832	350	int result;
1da177e4	351
4d8316d5 PM	352	if (acpi_disabled)
4d8316d5 PM	353	return -ENODEV;
1da177e4	354
fdcedbba	355	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	356	acpi_ac_dir = acpi_lock_ac_dir();
1da177e4	357	if (!acpi_ac_dir)
d550d98d	358	return -ENODEV;
8a246ee4	359	#endif
1da177e4 LT	360
	361	result = acpi_bus_register_driver(&acpi_ac_driver);
	362	if (result < 0) {
fdcedbba	363	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	364	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	365	#endif
d550d98d	366	return -ENODEV;
1da177e4 LT	367	}
1da177e4 LT	368
d550d98d	369	return 0;
1da177e4 LT	370	}
1da177e4 LT	371
4be44fcd	372	static void __exit acpi_ac_exit(void)
1da177e4	373	{
1da177e4 LT	374
	375	acpi_bus_unregister_driver(&acpi_ac_driver);
	376
fdcedbba	377	#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832	378	acpi_unlock_ac_dir(acpi_ac_dir);
8a246ee4	379	#endif
1da177e4	380
d550d98d	381	return;
1da177e4 LT	382	}
1da177e4 LT	383
1da177e4 LT	384	module_init(acpi_ac_init);
1da177e4 LT	385	module_exit(acpi_ac_exit);