[mirror_ubuntu-hirsute-kernel.git] / drivers / acpi / ac.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  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>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/dmi.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/acpi.h>
#include <acpi/battery.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");


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

struct acpi_ac_bl {
	const char *hid;
	int hrv;
};

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

/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
static const struct acpi_ac_bl acpi_ac_blacklist[] = {
	{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
	{ "INT34D3",  3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
};

#ifdef CONFIG_PM_SLEEP
static int acpi_ac_resume(struct device *dev);
#endif
static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);

static int ac_sleep_before_get_state_ms;
static int ac_check_pmic = 1;

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,
		.notify = acpi_ac_notify,
		},
	.drv.pm = &acpi_ac_pm,
};

struct acpi_ac {
	struct power_supply *charger;
	struct power_supply_desc charger_desc;
	struct acpi_device * device;
	unsigned long long state;
	struct notifier_block battery_nb;
};

#define to_acpi_ac(x) power_supply_get_drvdata(x)

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

/* --------------------------------------------------------------------------
                                   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));
		fallthrough;
	case ACPI_AC_NOTIFY_STATUS:
	case ACPI_NOTIFY_BUS_CHECK:
	case ACPI_NOTIFY_DEVICE_CHECK:
		/*
		 * A buggy BIOS may notify AC first and then sleep for
		 * a specific time before doing actual operations in the
		 * EC event handler (_Qxx). This will cause the AC state
		 * reported by the ACPI event to be incorrect, so wait for a
		 * specific time for the EC event handler to make progress.
		 */
		if (ac_sleep_before_get_state_ms > 0)
			msleep(ac_sleep_before_get_state_ms);

		acpi_ac_get_state(ac);
		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_battery_notify(struct notifier_block *nb,
				  unsigned long action, void *data)
{
	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	struct acpi_bus_event *event = (struct acpi_bus_event *)data;

	/*
	 * On HP Pavilion dv6-6179er AC status notifications aren't triggered
	 * when adapter is plugged/unplugged. However, battery status
	 * notifcations are triggered when battery starts charging or
	 * discharging. Re-reading AC status triggers lost AC notifications,
	 * if AC status has changed.
	 */
	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	    event->type == ACPI_BATTERY_NOTIFY_STATUS)
		acpi_ac_get_state(ac);

	return NOTIFY_OK;
}

static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
{
	ac_sleep_before_get_state_ms = 1000;
	return 0;
}

static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
{
	ac_check_pmic = 0;
	return 0;
}

/* Please keep this list alphabetically sorted */
static const struct dmi_system_id ac_dmi_table[]  __initconst = {
	{
		/* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */
		.callback = ac_do_not_check_pmic_quirk,
		.matches = {
			DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
		},
	},
	{
		/* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */
		.callback = ac_do_not_check_pmic_quirk,
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
			DMI_MATCH(DMI_PRODUCT_NAME, "80XF"),
			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
		},
	},
	{
		/* Lenovo Thinkpad e530, see comment in acpi_ac_notify() */
		.callback = thinkpad_e530_quirk,
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
			DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
		},
	},
	{},
};

static int acpi_ac_add(struct acpi_device *device)
{
	struct power_supply_config psy_cfg = {};
	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;

	psy_cfg.drv_data = ac;

	ac->charger_desc.name = acpi_device_bid(device);
	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	ac->charger_desc.properties = ac_props;
	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	ac->charger_desc.get_property = get_ac_property;
	ac->charger = power_supply_register(&ac->device->dev,
					    &ac->charger_desc, &psy_cfg);
	if (IS_ERR(ac->charger)) {
		result = PTR_ERR(ac->charger);
		goto end;
	}

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

	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
	register_acpi_notifier(&ac->battery_nb);
end:
	if (result) {
		kfree(ac);
	}

	return result;
}

#ifdef CONFIG_PM_SLEEP
static int acpi_ac_resume(struct device *dev)
{
	struct acpi_ac *ac;
	unsigned old_state;

	if (!dev)
		return -EINVAL;

	ac = acpi_driver_data(to_acpi_device(dev));
	if (!ac)
		return -EINVAL;

	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;
}
#else
#define acpi_ac_resume NULL
#endif

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


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

	ac = acpi_driver_data(device);

	power_supply_unregister(ac->charger);
	unregister_acpi_notifier(&ac->battery_nb);

	kfree(ac);

	return 0;
}

static int __init acpi_ac_init(void)
{
	unsigned int i;
	int result;

	if (acpi_disabled)
		return -ENODEV;

	dmi_check_system(ac_dmi_table);

	if (ac_check_pmic) {
		for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
			if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
					     acpi_ac_blacklist[i].hrv)) {
				pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
					acpi_ac_blacklist[i].hid);
				return -ENODEV;
			}
	}

	result = acpi_bus_register_driver(&acpi_ac_driver);
	if (result < 0) {
		return -ENODEV;
	}

	return 0;
}

static void __exit acpi_ac_exit(void)
{
	acpi_bus_unregister_driver(&acpi_ac_driver);
}
module_init(acpi_ac_init);
module_exit(acpi_ac_exit);
Commit	Line	Data
c942fddf	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
	4	*
	5	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	6	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
1da177e4 LT	7	*/
	8
	9	#include <linux/kernel.h>
	10	#include <linux/module.h>
5a0e3ad6	11	#include <linux/slab.h>
1da177e4 LT	12	#include <linux/init.h>
1da177e4 LT	13	#include <linux/types.h>
0ab5bb64 LT	14	#include <linux/dmi.h>
0ab5bb64 LT	15	#include <linux/delay.h>
cc8ef527	16	#include <linux/platform_device.h>
d5b4a3d0	17	#include <linux/power_supply.h>
8b48463f	18	#include <linux/acpi.h>
fa93854f	19	#include <acpi/battery.h>
1da177e4	20
a192a958 LB	21	#define PREFIX "ACPI: "
a192a958 LB	22
1da177e4	23	#define ACPI_AC_CLASS "ac_adapter"
1da177e4 LT	24	#define ACPI_AC_DEVICE_NAME "AC Adapter"
	25	#define ACPI_AC_FILE_STATE "state"
	26	#define ACPI_AC_NOTIFY_STATUS 0x80
	27	#define ACPI_AC_STATUS_OFFLINE 0x00
	28	#define ACPI_AC_STATUS_ONLINE 0x01
	29	#define ACPI_AC_STATUS_UNKNOWN 0xFF
	30
	31	#define _COMPONENT ACPI_AC_COMPONENT
f52fd66d	32	ACPI_MODULE_NAME("ac");
1da177e4	33
f52fd66d	34	MODULE_AUTHOR("Paul Diefenbaugh");
7cda93e0	35	MODULE_DESCRIPTION("ACPI AC Adapter Driver");
1da177e4 LT	36	MODULE_LICENSE("GPL");
1da177e4 LT	37
e63f6e28	38
98012849 GR	39	static int acpi_ac_add(struct acpi_device *device);
	40	static int acpi_ac_remove(struct acpi_device *device);
	41	static void acpi_ac_notify(struct acpi_device *device, u32 event);
	42
af3ec837 HG	43	struct acpi_ac_bl {
	44	const char *hid;
	45	int hrv;
	46	};
	47
98012849 GR	48	static const struct acpi_device_id ac_device_ids[] = {
	49	{"ACPI0003", 0},
	50	{"", 0},
	51	};
	52	MODULE_DEVICE_TABLE(acpi, ac_device_ids);
	53
af3ec837 HG	54	/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
	55	static const struct acpi_ac_bl acpi_ac_blacklist[] = {
	56	{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
	57	{ "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
	58	};
	59
98012849 GR	60	#ifdef CONFIG_PM_SLEEP
	61	static int acpi_ac_resume(struct device *dev);
	62	#endif
	63	static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
	64
0ab5bb64	65	static int ac_sleep_before_get_state_ms;
91ea5b1d	66	static int ac_check_pmic = 1;
0ab5bb64	67
98012849 GR	68	static struct acpi_driver acpi_ac_driver = {
	69	.name = "ac",
	70	.class = ACPI_AC_CLASS,
	71	.ids = ac_device_ids,
	72	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
	73	.ops = {
	74	.add = acpi_ac_add,
	75	.remove = acpi_ac_remove,
	76	.notify = acpi_ac_notify,
	77	},
	78	.drv.pm = &acpi_ac_pm,
	79	};
	80
1da177e4	81	struct acpi_ac {
297d716f KK	82	struct power_supply *charger;
297d716f KK	83	struct power_supply_desc charger_desc;
98012849	84	struct acpi_device * device;
27663c58	85	unsigned long long state;
4eee4f03	86	struct notifier_block battery_nb;
1da177e4 LT	87	};
1da177e4 LT	88
297d716f	89	#define to_acpi_ac(x) power_supply_get_drvdata(x)
d5b4a3d0	90
1da177e4 LT	91	/* --------------------------------------------------------------------------
	92	AC Adapter Management
	93	-------------------------------------------------------------------------- */
	94
4be44fcd	95	static int acpi_ac_get_state(struct acpi_ac *ac)
1da177e4	96	{
98012849 GR	97	acpi_status status = AE_OK;
	98
	99	if (!ac)
	100	return -EINVAL;
1da177e4	101
98012849	102	status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
cc8ef527	103	&ac->state);
1da177e4	104	if (ACPI_FAILURE(status)) {
cc8ef527 ZR	105	ACPI_EXCEPTION((AE_INFO, status,
cc8ef527 ZR	106	"Error reading AC Adapter state"));
1da177e4	107	ac->state = ACPI_AC_STATUS_UNKNOWN;
d550d98d	108	return -ENODEV;
1da177e4	109	}
4be44fcd	110
d550d98d	111	return 0;
1da177e4 LT	112	}
1da177e4 LT	113
3151dbb0 ZR	114	/* --------------------------------------------------------------------------
	115	sysfs I/F
	116	-------------------------------------------------------------------------- */
	117	static int get_ac_property(struct power_supply *psy,
	118	enum power_supply_property psp,
	119	union power_supply_propval *val)
	120	{
	121	struct acpi_ac *ac = to_acpi_ac(psy);
	122
	123	if (!ac)
	124	return -ENODEV;
	125
	126	if (acpi_ac_get_state(ac))
	127	return -ENODEV;
	128
	129	switch (psp) {
	130	case POWER_SUPPLY_PROP_ONLINE:
	131	val->intval = ac->state;
	132	break;
	133	default:
	134	return -EINVAL;
	135	}
	136	return 0;
	137	}
	138
	139	static enum power_supply_property ac_props[] = {
	140	POWER_SUPPLY_PROP_ONLINE,
	141	};
	142
1da177e4 LT	143	/* --------------------------------------------------------------------------
	144	Driver Model
	145	-------------------------------------------------------------------------- */
	146
98012849	147	static void acpi_ac_notify(struct acpi_device *device, u32 event)
1da177e4	148	{
98012849	149	struct acpi_ac *ac = acpi_driver_data(device);
1da177e4 LT	150
1da177e4 LT	151	if (!ac)
d550d98d	152	return;
1da177e4	153
1da177e4	154	switch (event) {
f163ff51 LB	155	default:
	156	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
	157	"Unsupported event [0x%x]\n", event));
57d2dd4b	158	fallthrough;
1da177e4	159	case ACPI_AC_NOTIFY_STATUS:
03d78252 CL	160	case ACPI_NOTIFY_BUS_CHECK:
03d78252 CL	161	case ACPI_NOTIFY_DEVICE_CHECK:
0ab5bb64 LT	162	/*
	163	* A buggy BIOS may notify AC first and then sleep for
	164	* a specific time before doing actual operations in the
	165	* EC event handler (_Qxx). This will cause the AC state
	166	* reported by the ACPI event to be incorrect, so wait for a
	167	* specific time for the EC event handler to make progress.
	168	*/
	169	if (ac_sleep_before_get_state_ms > 0)
	170	msleep(ac_sleep_before_get_state_ms);
	171
1da177e4	172	acpi_ac_get_state(ac);
98012849 GR	173	acpi_bus_generate_netlink_event(device->pnp.device_class,
	174	dev_name(&device->dev), event,
	175	(u32) ac->state);
	176	acpi_notifier_call_chain(device, event, (u32) ac->state);
297d716f	177	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
1da177e4 LT	178	}
1da177e4 LT	179
d550d98d	180	return;
1da177e4 LT	181	}
1da177e4 LT	182
4eee4f03 AM	183	static int acpi_ac_battery_notify(struct notifier_block *nb,
	184	unsigned long action, void *data)
	185	{
	186	struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
	187	struct acpi_bus_event event = (struct acpi_bus_event )data;
	188
	189	/*
	190	* On HP Pavilion dv6-6179er AC status notifications aren't triggered
	191	* when adapter is plugged/unplugged. However, battery status
	192	* notifcations are triggered when battery starts charging or
	193	* discharging. Re-reading AC status triggers lost AC notifications,
	194	* if AC status has changed.
	195	*/
	196	if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
	197	event->type == ACPI_BATTERY_NOTIFY_STATUS)
	198	acpi_ac_get_state(ac);
	199
	200	return NOTIFY_OK;
	201	}
	202
91ea5b1d	203	static int __init thinkpad_e530_quirk(const struct dmi_system_id *d)
0ab5bb64 LT	204	{
	205	ac_sleep_before_get_state_ms = 1000;
	206	return 0;
	207	}
	208
91ea5b1d CC	209	static int __init ac_do_not_check_pmic_quirk(const struct dmi_system_id *d)
	210	{
	211	ac_check_pmic = 0;
	212	return 0;
	213	}
	214
04900fa3	215	/* Please keep this list alphabetically sorted */
91ea5b1d	216	static const struct dmi_system_id ac_dmi_table[] __initconst = {
0ab5bb64	217	{
04900fa3 HG	218	/* ECS EF20EA, AXP288 PMIC but uses separate fuel-gauge */
	219	.callback = ac_do_not_check_pmic_quirk,
	220	.matches = {
	221	DMI_MATCH(DMI_PRODUCT_NAME, "EF20EA"),
0ab5bb64 LT	222	},
0ab5bb64 LT	223	},
91ea5b1d	224	{
04900fa3	225	/* Lenovo Ideapad Miix 320, AXP288 PMIC, separate fuel-gauge */
91ea5b1d CC	226	.callback = ac_do_not_check_pmic_quirk,
91ea5b1d CC	227	.matches = {
04900fa3 HG	228	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
	229	DMI_MATCH(DMI_PRODUCT_NAME, "80XF"),
	230	DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo MIIX 320-10ICR"),
91ea5b1d CC	231	},
	232	},
	233	{
04900fa3 HG	234	/* Lenovo Thinkpad e530, see comment in acpi_ac_notify() */
04900fa3 HG	235	.callback = thinkpad_e530_quirk,
91ea5b1d	236	.matches = {
04900fa3 HG	237	DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
04900fa3 HG	238	DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
91ea5b1d CC	239	},
91ea5b1d CC	240	},
0ab5bb64 LT	241	{},
	242	};
	243
98012849	244	static int acpi_ac_add(struct acpi_device *device)
1da177e4	245	{
297d716f	246	struct power_supply_config psy_cfg = {};
4be44fcd	247	int result = 0;
4be44fcd	248	struct acpi_ac *ac = NULL;
1da177e4	249
1da177e4	250
98012849 GR	251	if (!device)
98012849 GR	252	return -EINVAL;
cc8ef527	253
36bcbec7	254	ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
1da177e4	255	if (!ac)
d550d98d	256	return -ENOMEM;
1da177e4	257
98012849 GR	258	ac->device = device;
	259	strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
	260	strcpy(acpi_device_class(device), ACPI_AC_CLASS);
	261	device->driver_data = ac;
1da177e4 LT	262
	263	result = acpi_ac_get_state(ac);
	264	if (result)
	265	goto end;
	266
297d716f KK	267	psy_cfg.drv_data = ac;
	268
	269	ac->charger_desc.name = acpi_device_bid(device);
297d716f KK	270	ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
	271	ac->charger_desc.properties = ac_props;
	272	ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
	273	ac->charger_desc.get_property = get_ac_property;
	274	ac->charger = power_supply_register(&ac->device->dev,
	275	&ac->charger_desc, &psy_cfg);
	276	if (IS_ERR(ac->charger)) {
	277	result = PTR_ERR(ac->charger);
f197ac13	278	goto end;
297d716f	279	}
1da177e4	280
4be44fcd	281	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
98012849	282	acpi_device_name(device), acpi_device_bid(device),
4be44fcd	283	ac->state ? "on-line" : "off-line");
1da177e4	284
4eee4f03 AM	285	ac->battery_nb.notifier_call = acpi_ac_battery_notify;
4eee4f03 AM	286	register_acpi_notifier(&ac->battery_nb);
ab0fd674	287	end:
e63f6e28	288	if (result) {
1da177e4	289	kfree(ac);
e63f6e28	290	}
1da177e4	291
d550d98d	292	return result;
1da177e4 LT	293	}
1da177e4 LT	294
90692404	295	#ifdef CONFIG_PM_SLEEP
ccda7069	296	static int acpi_ac_resume(struct device *dev)
5bfeca31 AS	297	{
	298	struct acpi_ac *ac;
	299	unsigned old_state;
ccda7069 RW	300
	301	if (!dev)
	302	return -EINVAL;
	303
98012849	304	ac = acpi_driver_data(to_acpi_device(dev));
ccda7069	305	if (!ac)
5bfeca31	306	return -EINVAL;
ccda7069	307
5bfeca31 AS	308	old_state = ac->state;
	309	if (acpi_ac_get_state(ac))
	310	return 0;
	311	if (old_state != ac->state)
297d716f	312	kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
5bfeca31 AS	313	return 0;
5bfeca31 AS	314	}
06521c2e SK	315	#else
06521c2e SK	316	#define acpi_ac_resume NULL
90692404	317	#endif
5bfeca31	318
98012849	319	static int acpi_ac_remove(struct acpi_device *device)
1da177e4	320	{
98012849 GR	321	struct acpi_ac *ac = NULL;
98012849 GR	322
1da177e4	323
98012849	324	if (!device \|\| !acpi_driver_data(device))
d550d98d	325	return -EINVAL;
1da177e4	326
98012849	327	ac = acpi_driver_data(device);
1da177e4	328
297d716f	329	power_supply_unregister(ac->charger);
4eee4f03	330	unregister_acpi_notifier(&ac->battery_nb);
cc8ef527	331
1da177e4 LT	332	kfree(ac);
1da177e4 LT	333
d550d98d	334	return 0;
1da177e4 LT	335	}
1da177e4 LT	336
4be44fcd	337	static int __init acpi_ac_init(void)
1da177e4	338	{
af3ec837	339	unsigned int i;
3f86b832	340	int result;
1da177e4	341
4d8316d5 PM	342	if (acpi_disabled)
4d8316d5 PM	343	return -ENODEV;
1da177e4	344
91ea5b1d CC	345	dmi_check_system(ac_dmi_table);
	346
	347	if (ac_check_pmic) {
	348	for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
	349	if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
	350	acpi_ac_blacklist[i].hrv)) {
	351	pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
	352	acpi_ac_blacklist[i].hid);
	353	return -ENODEV;
	354	}
	355	}
af3ec837	356
98012849	357	result = acpi_bus_register_driver(&acpi_ac_driver);
e63f6e28	358	if (result < 0) {
d550d98d	359	return -ENODEV;
e63f6e28	360	}
1da177e4	361
d550d98d	362	return 0;
1da177e4 LT	363	}
1da177e4 LT	364
4be44fcd	365	static void __exit acpi_ac_exit(void)
1da177e4	366	{
98012849	367	acpi_bus_unregister_driver(&acpi_ac_driver);
1da177e4	368	}
1da177e4 LT	369	module_init(acpi_ac_init);
1da177e4 LT	370	module_exit(acpi_ac_exit);