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ACPI / Battery: Add the power unit macro
[mirror_ubuntu-artful-kernel.git] / drivers / acpi / battery.c
CommitLineData
1da177e4 1/*
aa650bbd 2 * battery.c - ACPI Battery Driver (Revision: 2.0)
1da177e4 3 *
aa650bbd
AS		 4 * Copyright (C) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>
5 * Copyright (C) 2004-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>
1da177e4
LT		 6 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
7 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
8 *
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or (at
14 * your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
24 *
25 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 */
27
28#include <linux/kernel.h>
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/types.h>
f1d4661a 32#include <linux/jiffies.h>
0f66af53 33#include <linux/async.h>
bc76f90b 34#include <linux/dmi.h>
5a0e3ad6 35#include <linux/slab.h>
25be5821 36#include <linux/suspend.h>
d7380965 37
fdcedbba 38#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4
LT		 39#include <linux/proc_fs.h>
40#include <linux/seq_file.h>
41#include <asm/uaccess.h>
d7380965 42#endif
1da177e4
LT		 43
44#include <acpi/acpi_bus.h>
45#include <acpi/acpi_drivers.h>
d7380965
AS		 46#include <linux/power_supply.h>
47
a192a958
LB		 48#define PREFIX "ACPI: "
49
1da177e4
LT		 50#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
51
1da177e4 52#define ACPI_BATTERY_CLASS "battery"
1da177e4 53#define ACPI_BATTERY_DEVICE_NAME "Battery"
1da177e4
LT		 54#define ACPI_BATTERY_NOTIFY_STATUS 0x80
55#define ACPI_BATTERY_NOTIFY_INFO 0x81
c67fcd67 56#define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82
1da177e4 57
ae6f6187
LT		 58/* Battery power unit: 0 means mW, 1 means mA */
59#define ACPI_BATTERY_POWER_UNIT_MA 1
60
1da177e4 61#define _COMPONENT ACPI_BATTERY_COMPONENT
b6ce4083 62
f52fd66d 63ACPI_MODULE_NAME("battery");
1da177e4 64
f52fd66d 65MODULE_AUTHOR("Paul Diefenbaugh");
aa650bbd 66MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
7cda93e0 67MODULE_DESCRIPTION("ACPI Battery Driver");
1da177e4
LT		 68MODULE_LICENSE("GPL");
69
f1d4661a
AS		 70static unsigned int cache_time = 1000;
71module_param(cache_time, uint, 0644);
72MODULE_PARM_DESC(cache_time, "cache time in milliseconds");
b6ce4083 73
fdcedbba 74#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832
RT		 75extern struct proc_dir_entry *acpi_lock_battery_dir(void);
76extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir);
77
d7380965
AS		 78enum acpi_battery_files {
79 info_tag = 0,
80 state_tag,
81 alarm_tag,
82 ACPI_BATTERY_NUMFILES,
83};
84
85#endif
86
1ba90e3a
TR		 87static const struct acpi_device_id battery_device_ids[] = {
88 {"PNP0C0A", 0},
89 {"", 0},
90};
1ba90e3a 91
aa650bbd 92MODULE_DEVICE_TABLE(acpi, battery_device_ids);
1da177e4 93
7b3bcc4a
AS		 94enum {
95 ACPI_BATTERY_ALARM_PRESENT,
c67fcd67
AS		 96 ACPI_BATTERY_XINFO_PRESENT,
97 /* For buggy DSDTs that report negative 16-bit values for either
98 * charging or discharging current and/or report 0 as 65536
99 * due to bad math.
100 */
7b3bcc4a 101 ACPI_BATTERY_QUIRK_SIGNED16_CURRENT,
557d5868 102 ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY,
7b3bcc4a 103};
78490d82 104
1da177e4 105struct acpi_battery {
038fdea2 106 struct mutex lock;
d7380965 107 struct power_supply bat;
f1d4661a 108 struct acpi_device *device;
25be5821 109 struct notifier_block pm_nb;
f1d4661a 110 unsigned long update_time;
7faa144a 111 int rate_now;
d7380965
AS		 112 int capacity_now;
113 int voltage_now;
038fdea2 114 int design_capacity;
d7380965 115 int full_charge_capacity;
038fdea2
AS		 116 int technology;
117 int design_voltage;
118 int design_capacity_warning;
119 int design_capacity_low;
c67fcd67
AS		 120 int cycle_count;
121 int measurement_accuracy;
122 int max_sampling_time;
123 int min_sampling_time;
124 int max_averaging_interval;
125 int min_averaging_interval;
038fdea2
AS		 126 int capacity_granularity_1;
127 int capacity_granularity_2;
f1d4661a 128 int alarm;
038fdea2
AS		 129 char model_number[32];
130 char serial_number[32];
131 char type[32];
132 char oem_info[32];
f1d4661a
AS		 133 int state;
134 int power_unit;
7b3bcc4a 135 unsigned long flags;
1da177e4
LT		 136};
137
d7380965
AS		 138#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);
139
78490d82 140inline int acpi_battery_present(struct acpi_battery *battery)
b6ce4083 141{
78490d82
AS		 142 return battery->device->status.battery_present;
143}
038fdea2 144
d7380965
AS		 145static int acpi_battery_technology(struct acpi_battery *battery)
146{
147 if (!strcasecmp("NiCd", battery->type))
148 return POWER_SUPPLY_TECHNOLOGY_NiCd;
149 if (!strcasecmp("NiMH", battery->type))
150 return POWER_SUPPLY_TECHNOLOGY_NiMH;
151 if (!strcasecmp("LION", battery->type))
152 return POWER_SUPPLY_TECHNOLOGY_LION;
ad40e68b 153 if (!strncasecmp("LI-ION", battery->type, 6))
0bde7eee 154 return POWER_SUPPLY_TECHNOLOGY_LION;
d7380965
AS		 155 if (!strcasecmp("LiP", battery->type))
156 return POWER_SUPPLY_TECHNOLOGY_LIPO;
157 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
158}
159
9104476e 160static int acpi_battery_get_state(struct acpi_battery *battery);
b19073a0 161
56f382a0
RH		 162static int acpi_battery_is_charged(struct acpi_battery *battery)
163{
164 /* either charging or discharging */
165 if (battery->state != 0)
166 return 0;
167
168 /* battery not reporting charge */
169 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN ||
170 battery->capacity_now == 0)
171 return 0;
172
173 /* good batteries update full_charge as the batteries degrade */
174 if (battery->full_charge_capacity == battery->capacity_now)
175 return 1;
176
177 /* fallback to using design values for broken batteries */
178 if (battery->design_capacity == battery->capacity_now)
179 return 1;
180
181 /* we don't do any sort of metric based on percentages */
182 return 0;
183}
184
d7380965
AS		 185static int acpi_battery_get_property(struct power_supply *psy,
186 enum power_supply_property psp,
187 union power_supply_propval *val)
188{
a1b4bd69 189 int ret = 0;
d7380965
AS		 190 struct acpi_battery *battery = to_acpi_battery(psy);
191
9104476e
AS		 192 if (acpi_battery_present(battery)) {
193 /* run battery update only if it is present */
194 acpi_battery_get_state(battery);
195 } else if (psp != POWER_SUPPLY_PROP_PRESENT)
d7380965
AS		 196 return -ENODEV;
197 switch (psp) {
198 case POWER_SUPPLY_PROP_STATUS:
199 if (battery->state & 0x01)
200 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
201 else if (battery->state & 0x02)
202 val->intval = POWER_SUPPLY_STATUS_CHARGING;
56f382a0 203 else if (acpi_battery_is_charged(battery))
d7380965 204 val->intval = POWER_SUPPLY_STATUS_FULL;
4c41d3ad
RD		 205 else
206 val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
d7380965
AS		 207 break;
208 case POWER_SUPPLY_PROP_PRESENT:
209 val->intval = acpi_battery_present(battery);
210 break;
211 case POWER_SUPPLY_PROP_TECHNOLOGY:
212 val->intval = acpi_battery_technology(battery);
213 break;
c67fcd67
AS		 214 case POWER_SUPPLY_PROP_CYCLE_COUNT:
215 val->intval = battery->cycle_count;
216 break;
d7380965 217 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
a1b4bd69
RW		 218 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
219 ret = -ENODEV;
220 else
221 val->intval = battery->design_voltage * 1000;
d7380965
AS		 222 break;
223 case POWER_SUPPLY_PROP_VOLTAGE_NOW:
a1b4bd69
RW		 224 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
225 ret = -ENODEV;
226 else
227 val->intval = battery->voltage_now * 1000;
d7380965
AS		 228 break;
229 case POWER_SUPPLY_PROP_CURRENT_NOW:
7faa144a 230 case POWER_SUPPLY_PROP_POWER_NOW:
a1b4bd69
RW		 231 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
232 ret = -ENODEV;
233 else
234 val->intval = battery->rate_now * 1000;
d7380965
AS		 235 break;
236 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
237 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
a1b4bd69
RW		 238 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
239 ret = -ENODEV;
240 else
241 val->intval = battery->design_capacity * 1000;
d7380965
AS		 242 break;
243 case POWER_SUPPLY_PROP_CHARGE_FULL:
244 case POWER_SUPPLY_PROP_ENERGY_FULL:
a1b4bd69
RW		 245 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
246 ret = -ENODEV;
247 else
248 val->intval = battery->full_charge_capacity * 1000;
d7380965
AS		 249 break;
250 case POWER_SUPPLY_PROP_CHARGE_NOW:
251 case POWER_SUPPLY_PROP_ENERGY_NOW:
a1b4bd69
RW		 252 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
253 ret = -ENODEV;
254 else
255 val->intval = battery->capacity_now * 1000;
d7380965
AS		 256 break;
257 case POWER_SUPPLY_PROP_MODEL_NAME:
258 val->strval = battery->model_number;
259 break;
260 case POWER_SUPPLY_PROP_MANUFACTURER:
261 val->strval = battery->oem_info;
262 break;
7c2670bb 263 case POWER_SUPPLY_PROP_SERIAL_NUMBER:
264 val->strval = battery->serial_number;
265 break;
d7380965 266 default:
a1b4bd69 267 ret = -EINVAL;
d7380965 268 }
a1b4bd69 269 return ret;
d7380965
AS		 270}
271
272static enum power_supply_property charge_battery_props[] = {
273 POWER_SUPPLY_PROP_STATUS,
274 POWER_SUPPLY_PROP_PRESENT,
275 POWER_SUPPLY_PROP_TECHNOLOGY,
c67fcd67 276 POWER_SUPPLY_PROP_CYCLE_COUNT,
d7380965
AS		 277 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
278 POWER_SUPPLY_PROP_VOLTAGE_NOW,
279 POWER_SUPPLY_PROP_CURRENT_NOW,
280 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
281 POWER_SUPPLY_PROP_CHARGE_FULL,
282 POWER_SUPPLY_PROP_CHARGE_NOW,
283 POWER_SUPPLY_PROP_MODEL_NAME,
284 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 285 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965
AS		 286};
287
288static enum power_supply_property energy_battery_props[] = {
289 POWER_SUPPLY_PROP_STATUS,
290 POWER_SUPPLY_PROP_PRESENT,
291 POWER_SUPPLY_PROP_TECHNOLOGY,
c67fcd67 292 POWER_SUPPLY_PROP_CYCLE_COUNT,
d7380965
AS		 293 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
294 POWER_SUPPLY_PROP_VOLTAGE_NOW,
7faa144a 295 POWER_SUPPLY_PROP_POWER_NOW,
d7380965
AS		 296 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
297 POWER_SUPPLY_PROP_ENERGY_FULL,
298 POWER_SUPPLY_PROP_ENERGY_NOW,
299 POWER_SUPPLY_PROP_MODEL_NAME,
300 POWER_SUPPLY_PROP_MANUFACTURER,
7c2670bb 301 POWER_SUPPLY_PROP_SERIAL_NUMBER,
d7380965
AS		 302};
303
fdcedbba 304#ifdef CONFIG_ACPI_PROCFS_POWER
f1d4661a 305inline char *acpi_battery_units(struct acpi_battery *battery)
78490d82 306{
ae6f6187
LT		 307 return (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) ?
308 "mA" : "mW";
b6ce4083 309}
d7380965 310#endif
b6ce4083 311
78490d82
AS		 312/* --------------------------------------------------------------------------
313 Battery Management
314 -------------------------------------------------------------------------- */
038fdea2
AS		 315struct acpi_offsets {
316 size_t offset; /* offset inside struct acpi_sbs_battery */
317 u8 mode; /* int or string? */
318};
b6ce4083 319
038fdea2
AS		 320static struct acpi_offsets state_offsets[] = {
321 {offsetof(struct acpi_battery, state), 0},
7faa144a 322 {offsetof(struct acpi_battery, rate_now), 0},
d7380965
AS		 323 {offsetof(struct acpi_battery, capacity_now), 0},
324 {offsetof(struct acpi_battery, voltage_now), 0},
038fdea2 325};
b6ce4083 326
038fdea2
AS		 327static struct acpi_offsets info_offsets[] = {
328 {offsetof(struct acpi_battery, power_unit), 0},
329 {offsetof(struct acpi_battery, design_capacity), 0},
d7380965 330 {offsetof(struct acpi_battery, full_charge_capacity), 0},
038fdea2
AS		 331 {offsetof(struct acpi_battery, technology), 0},
332 {offsetof(struct acpi_battery, design_voltage), 0},
333 {offsetof(struct acpi_battery, design_capacity_warning), 0},
334 {offsetof(struct acpi_battery, design_capacity_low), 0},
335 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
336 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
337 {offsetof(struct acpi_battery, model_number), 1},
338 {offsetof(struct acpi_battery, serial_number), 1},
339 {offsetof(struct acpi_battery, type), 1},
340 {offsetof(struct acpi_battery, oem_info), 1},
341};
b6ce4083 342
c67fcd67
AS		 343static struct acpi_offsets extended_info_offsets[] = {
344 {offsetof(struct acpi_battery, power_unit), 0},
345 {offsetof(struct acpi_battery, design_capacity), 0},
346 {offsetof(struct acpi_battery, full_charge_capacity), 0},
347 {offsetof(struct acpi_battery, technology), 0},
348 {offsetof(struct acpi_battery, design_voltage), 0},
349 {offsetof(struct acpi_battery, design_capacity_warning), 0},
350 {offsetof(struct acpi_battery, design_capacity_low), 0},
351 {offsetof(struct acpi_battery, cycle_count), 0},
352 {offsetof(struct acpi_battery, measurement_accuracy), 0},
353 {offsetof(struct acpi_battery, max_sampling_time), 0},
354 {offsetof(struct acpi_battery, min_sampling_time), 0},
355 {offsetof(struct acpi_battery, max_averaging_interval), 0},
356 {offsetof(struct acpi_battery, min_averaging_interval), 0},
357 {offsetof(struct acpi_battery, capacity_granularity_1), 0},
358 {offsetof(struct acpi_battery, capacity_granularity_2), 0},
359 {offsetof(struct acpi_battery, model_number), 1},
360 {offsetof(struct acpi_battery, serial_number), 1},
361 {offsetof(struct acpi_battery, type), 1},
362 {offsetof(struct acpi_battery, oem_info), 1},
363};
364
038fdea2
AS		 365static int extract_package(struct acpi_battery *battery,
366 union acpi_object *package,
367 struct acpi_offsets *offsets, int num)
368{
106449e8 369 int i;
038fdea2
AS		 370 union acpi_object *element;
371 if (package->type != ACPI_TYPE_PACKAGE)
372 return -EFAULT;
373 for (i = 0; i < num; ++i) {
374 if (package->package.count <= i)
375 return -EFAULT;
376 element = &package->package.elements[i];
377 if (offsets[i].mode) {
106449e8
AS		 378 u8 *ptr = (u8 *)battery + offsets[i].offset;
379 if (element->type == ACPI_TYPE_STRING ||
380 element->type == ACPI_TYPE_BUFFER)
381 strncpy(ptr, element->string.pointer, 32);
382 else if (element->type == ACPI_TYPE_INTEGER) {
383 strncpy(ptr, (u8 *)&element->integer.value,
439913ff
LM		 384 sizeof(u64));
385 ptr[sizeof(u64)] = 0;
b8a1bdb1
AS		 386 } else
387 *ptr = 0; /* don't have value */
038fdea2 388 } else {
b8a1bdb1
AS		 389 int *x = (int *)((u8 *)battery + offsets[i].offset);
390 *x = (element->type == ACPI_TYPE_INTEGER) ?
391 element->integer.value : -1;
038fdea2 392 }
b6ce4083 393 }
b6ce4083
VL		 394 return 0;
395}
396
397static int acpi_battery_get_status(struct acpi_battery *battery)
398{
aa650bbd 399 if (acpi_bus_get_status(battery->device)) {
b6ce4083
VL		 400 ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA"));
401 return -ENODEV;
402 }
aa650bbd 403 return 0;
b6ce4083
VL		 404}
405
406static int acpi_battery_get_info(struct acpi_battery *battery)
1da177e4 407{
aa650bbd 408 int result = -EFAULT;
4be44fcd 409 acpi_status status = 0;
c67fcd67
AS		 410 char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)?
411 "_BIX" : "_BIF";
412
4be44fcd 413 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 414
b6ce4083
VL		 415 if (!acpi_battery_present(battery))
416 return 0;
038fdea2 417 mutex_lock(&battery->lock);
c67fcd67
AS		 418 status = acpi_evaluate_object(battery->device->handle, name,
419 NULL, &buffer);
038fdea2 420 mutex_unlock(&battery->lock);
aa650bbd 421
1da177e4 422 if (ACPI_FAILURE(status)) {
c67fcd67 423 ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name));
d550d98d 424 return -ENODEV;
1da177e4 425 }
c67fcd67
AS		 426 if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags))
427 result = extract_package(battery, buffer.pointer,
428 extended_info_offsets,
429 ARRAY_SIZE(extended_info_offsets));
430 else
431 result = extract_package(battery, buffer.pointer,
432 info_offsets, ARRAY_SIZE(info_offsets));
78490d82 433 kfree(buffer.pointer);
557d5868
ZR		 434 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
435 battery->full_charge_capacity = battery->design_capacity;
d550d98d 436 return result;
1da177e4
LT		 437}
438
b6ce4083 439static int acpi_battery_get_state(struct acpi_battery *battery)
1da177e4 440{
4be44fcd
LB		 441 int result = 0;
442 acpi_status status = 0;
443 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1da177e4 444
b6ce4083
VL		 445 if (!acpi_battery_present(battery))
446 return 0;
1da177e4 447
f1d4661a
AS		 448 if (battery->update_time &&
449 time_before(jiffies, battery->update_time +
450 msecs_to_jiffies(cache_time)))
451 return 0;
452
038fdea2 453 mutex_lock(&battery->lock);
f1d4661a 454 status = acpi_evaluate_object(battery->device->handle, "_BST",
038fdea2
AS		 455 NULL, &buffer);
456 mutex_unlock(&battery->lock);
5b31d895 457
1da177e4 458 if (ACPI_FAILURE(status)) {
a6fc6720 459 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST"));
d550d98d 460 return -ENODEV;
1da177e4 461 }
aa650bbd 462
038fdea2
AS		 463 result = extract_package(battery, buffer.pointer,
464 state_offsets, ARRAY_SIZE(state_offsets));
f1d4661a 465 battery->update_time = jiffies;
78490d82 466 kfree(buffer.pointer);
bc76f90b 467
7b3bcc4a 468 if (test_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags) &&
bc76f90b
HM		 469 battery->rate_now != -1)
470 battery->rate_now = abs((s16)battery->rate_now);
471
557d5868
ZR		 472 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)
473 && battery->capacity_now >= 0 && battery->capacity_now <= 100)
474 battery->capacity_now = (battery->capacity_now *
475 battery->full_charge_capacity) / 100;
b6ce4083
VL		 476 return result;
477}
1da177e4 478
aa650bbd 479static int acpi_battery_set_alarm(struct acpi_battery *battery)
1da177e4 480{
4be44fcd 481 acpi_status status = 0;
aa650bbd 482 union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER };
4be44fcd 483 struct acpi_object_list arg_list = { 1, &arg0 };
1da177e4 484
c67fcd67 485 if (!acpi_battery_present(battery) ||
7b3bcc4a 486 !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags))
d550d98d 487 return -ENODEV;
1da177e4 488
aa650bbd 489 arg0.integer.value = battery->alarm;
1da177e4 490
038fdea2 491 mutex_lock(&battery->lock);
f1d4661a
AS		 492 status = acpi_evaluate_object(battery->device->handle, "_BTP",
493 &arg_list, NULL);
038fdea2 494 mutex_unlock(&battery->lock);
aa650bbd 495
1da177e4 496 if (ACPI_FAILURE(status))
d550d98d 497 return -ENODEV;
1da177e4 498
aa650bbd 499 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm));
d550d98d 500 return 0;
1da177e4
LT		 501}
502
b6ce4083 503static int acpi_battery_init_alarm(struct acpi_battery *battery)
1da177e4 504{
4be44fcd
LB		 505 acpi_status status = AE_OK;
506 acpi_handle handle = NULL;
4be44fcd 507
b6ce4083 508 /* See if alarms are supported, and if so, set default */
f1d4661a
AS		 509 status = acpi_get_handle(battery->device->handle, "_BTP", &handle);
510 if (ACPI_FAILURE(status)) {
7b3bcc4a 511 clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a 512 return 0;
b6ce4083 513 }
7b3bcc4a 514 set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags);
f1d4661a
AS		 515 if (!battery->alarm)
516 battery->alarm = battery->design_capacity_warning;
aa650bbd 517 return acpi_battery_set_alarm(battery);
b6ce4083 518}
1da177e4 519
508df92d
AB		 520static ssize_t acpi_battery_alarm_show(struct device *dev,
521 struct device_attribute *attr,
522 char *buf)
523{
524 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
525 return sprintf(buf, "%d\n", battery->alarm * 1000);
526}
527
528static ssize_t acpi_battery_alarm_store(struct device *dev,
529 struct device_attribute *attr,
530 const char *buf, size_t count)
531{
532 unsigned long x;
533 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));
534 if (sscanf(buf, "%ld\n", &x) == 1)
535 battery->alarm = x/1000;
536 if (acpi_battery_present(battery))
537 acpi_battery_set_alarm(battery);
538 return count;
539}
540
541static struct device_attribute alarm_attr = {
01e8ef11 542 .attr = {.name = "alarm", .mode = 0644},
508df92d
AB		 543 .show = acpi_battery_alarm_show,
544 .store = acpi_battery_alarm_store,
545};
546
547static int sysfs_add_battery(struct acpi_battery *battery)
548{
549 int result;
550
ae6f6187 551 if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
508df92d
AB		 552 battery->bat.properties = charge_battery_props;
553 battery->bat.num_properties =
554 ARRAY_SIZE(charge_battery_props);
555 } else {
556 battery->bat.properties = energy_battery_props;
557 battery->bat.num_properties =
558 ARRAY_SIZE(energy_battery_props);
559 }
560
561 battery->bat.name = acpi_device_bid(battery->device);
562 battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;
563 battery->bat.get_property = acpi_battery_get_property;
564
565 result = power_supply_register(&battery->device->dev, &battery->bat);
566 if (result)
567 return result;
568 return device_create_file(battery->bat.dev, &alarm_attr);
569}
570
571static void sysfs_remove_battery(struct acpi_battery *battery)
572{
573 if (!battery->bat.dev)
574 return;
575 device_remove_file(battery->bat.dev, &alarm_attr);
576 power_supply_unregister(&battery->bat);
9104476e 577 battery->bat.dev = NULL;
508df92d
AB		 578}
579
bc76f90b
HM		 580static void acpi_battery_quirks(struct acpi_battery *battery)
581{
ae6f6187
LT		 582 if (dmi_name_in_vendors("Acer") &&
583 battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) {
7b3bcc4a 584 set_bit(ACPI_BATTERY_QUIRK_SIGNED16_CURRENT, &battery->flags);
bc76f90b
HM		 585 }
586}
587
557d5868
ZR		 588/*
589 * According to the ACPI spec, some kinds of primary batteries can
590 * report percentage battery remaining capacity directly to OS.
591 * In this case, it reports the Last Full Charged Capacity == 100
592 * and BatteryPresentRate == 0xFFFFFFFF.
593 *
594 * Now we found some battery reports percentage remaining capacity
595 * even if it's rechargeable.
596 * https://bugzilla.kernel.org/show_bug.cgi?id=15979
597 *
598 * Handle this correctly so that they won't break userspace.
599 */
600static void acpi_battery_quirks2(struct acpi_battery *battery)
601{
602 if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags))
603 return ;
604
605 if (battery->full_charge_capacity == 100 &&
606 battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN &&
607 battery->capacity_now >=0 && battery->capacity_now <= 100) {
608 set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags);
609 battery->full_charge_capacity = battery->design_capacity;
610 battery->capacity_now = (battery->capacity_now *
611 battery->full_charge_capacity) / 100;
612 }
613}
614
f1d4661a 615static int acpi_battery_update(struct acpi_battery *battery)
b6ce4083 616{
50b17851 617 int result, old_present = acpi_battery_present(battery);
97749cd9 618 result = acpi_battery_get_status(battery);
508df92d 619 if (result)
b6ce4083 620 return result;
508df92d
AB		 621 if (!acpi_battery_present(battery)) {
622 sysfs_remove_battery(battery);
97749cd9 623 battery->update_time = 0;
508df92d 624 return 0;
b6ce4083 625 }
50b17851
AS		 626 if (!battery->update_time ||
627 old_present != acpi_battery_present(battery)) {
97749cd9
AS		 628 result = acpi_battery_get_info(battery);
629 if (result)
630 return result;
bc76f90b 631 acpi_battery_quirks(battery);
97749cd9
AS		 632 acpi_battery_init_alarm(battery);
633 }
508df92d
AB		 634 if (!battery->bat.dev)
635 sysfs_add_battery(battery);
557d5868
ZR		 636 result = acpi_battery_get_state(battery);
637 acpi_battery_quirks2(battery);
638 return result;
4bd35cdb
VL		 639}
640
da8aeb92
RW		 641static void acpi_battery_refresh(struct acpi_battery *battery)
642{
643 if (!battery->bat.dev)
644 return;
645
646 acpi_battery_get_info(battery);
647 /* The battery may have changed its reporting units. */
648 sysfs_remove_battery(battery);
649 sysfs_add_battery(battery);
650}
651
1da177e4
LT		 652/* --------------------------------------------------------------------------
653 FS Interface (/proc)
654 -------------------------------------------------------------------------- */
655
fdcedbba 656#ifdef CONFIG_ACPI_PROCFS_POWER
4be44fcd 657static struct proc_dir_entry *acpi_battery_dir;
b6ce4083 658
78490d82 659static int acpi_battery_print_info(struct seq_file *seq, int result)
1da177e4 660{
50dd0969 661 struct acpi_battery *battery = seq->private;
1da177e4 662
b6ce4083 663 if (result)
1da177e4
LT		 664 goto end;
665
aa650bbd
AS		 666 seq_printf(seq, "present: %s\n",
667 acpi_battery_present(battery)?"yes":"no");
668 if (!acpi_battery_present(battery))
1da177e4 669 goto end;
038fdea2 670 if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 671 seq_printf(seq, "design capacity: unknown\n");
672 else
673 seq_printf(seq, "design capacity: %d %sh\n",
aa650bbd
AS		 674 battery->design_capacity,
675 acpi_battery_units(battery));
1da177e4 676
d7380965 677 if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 678 seq_printf(seq, "last full capacity: unknown\n");
679 else
680 seq_printf(seq, "last full capacity: %d %sh\n",
d7380965 681 battery->full_charge_capacity,
aa650bbd
AS		 682 acpi_battery_units(battery));
683
684 seq_printf(seq, "battery technology: %srechargeable\n",
685 (!battery->technology)?"non-":"");
1da177e4 686
038fdea2 687 if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 688 seq_printf(seq, "design voltage: unknown\n");
689 else
690 seq_printf(seq, "design voltage: %d mV\n",
aa650bbd 691 battery->design_voltage);
1da177e4 692 seq_printf(seq, "design capacity warning: %d %sh\n",
aa650bbd
AS		 693 battery->design_capacity_warning,
694 acpi_battery_units(battery));
1da177e4 695 seq_printf(seq, "design capacity low: %d %sh\n",
aa650bbd
AS		 696 battery->design_capacity_low,
697 acpi_battery_units(battery));
c67fcd67 698 seq_printf(seq, "cycle count: %i\n", battery->cycle_count);
1da177e4 699 seq_printf(seq, "capacity granularity 1: %d %sh\n",
aa650bbd
AS		 700 battery->capacity_granularity_1,
701 acpi_battery_units(battery));
1da177e4 702 seq_printf(seq, "capacity granularity 2: %d %sh\n",
aa650bbd
AS		 703 battery->capacity_granularity_2,
704 acpi_battery_units(battery));
038fdea2
AS		 705 seq_printf(seq, "model number: %s\n", battery->model_number);
706 seq_printf(seq, "serial number: %s\n", battery->serial_number);
707 seq_printf(seq, "battery type: %s\n", battery->type);
708 seq_printf(seq, "OEM info: %s\n", battery->oem_info);
4be44fcd 709 end:
b6ce4083
VL		 710 if (result)
711 seq_printf(seq, "ERROR: Unable to read battery info\n");
b6ce4083
VL		 712 return result;
713}
714
78490d82 715static int acpi_battery_print_state(struct seq_file *seq, int result)
1da177e4 716{
50dd0969 717 struct acpi_battery *battery = seq->private;
1da177e4 718
b6ce4083 719 if (result)
1da177e4
LT		 720 goto end;
721
aa650bbd
AS		 722 seq_printf(seq, "present: %s\n",
723 acpi_battery_present(battery)?"yes":"no");
724 if (!acpi_battery_present(battery))
1da177e4 725 goto end;
b6ce4083 726
aa650bbd
AS		 727 seq_printf(seq, "capacity state: %s\n",
728 (battery->state & 0x04)?"critical":"ok");
729 if ((battery->state & 0x01) && (battery->state & 0x02))
4be44fcd
LB		 730 seq_printf(seq,
731 "charging state: charging/discharging\n");
aa650bbd 732 else if (battery->state & 0x01)
1da177e4 733 seq_printf(seq, "charging state: discharging\n");
038fdea2 734 else if (battery->state & 0x02)
1da177e4 735 seq_printf(seq, "charging state: charging\n");
aa650bbd 736 else
1da177e4 737 seq_printf(seq, "charging state: charged\n");
1da177e4 738
7faa144a 739 if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 740 seq_printf(seq, "present rate: unknown\n");
741 else
742 seq_printf(seq, "present rate: %d %s\n",
7faa144a 743 battery->rate_now, acpi_battery_units(battery));
1da177e4 744
d7380965 745 if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 746 seq_printf(seq, "remaining capacity: unknown\n");
747 else
748 seq_printf(seq, "remaining capacity: %d %sh\n",
d7380965
AS		 749 battery->capacity_now, acpi_battery_units(battery));
750 if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN)
1da177e4
LT		 751 seq_printf(seq, "present voltage: unknown\n");
752 else
753 seq_printf(seq, "present voltage: %d mV\n",
d7380965 754 battery->voltage_now);
4be44fcd 755 end:
aa650bbd 756 if (result)
b6ce4083 757 seq_printf(seq, "ERROR: Unable to read battery state\n");
b6ce4083
VL		 758
759 return result;
760}
761
78490d82 762static int acpi_battery_print_alarm(struct seq_file *seq, int result)
1da177e4 763{
50dd0969 764 struct acpi_battery *battery = seq->private;
1da177e4 765
b6ce4083 766 if (result)
1da177e4
LT		 767 goto end;
768
b6ce4083 769 if (!acpi_battery_present(battery)) {
1da177e4
LT		 770 seq_printf(seq, "present: no\n");
771 goto end;
772 }
1da177e4
LT		 773 seq_printf(seq, "alarm: ");
774 if (!battery->alarm)
775 seq_printf(seq, "unsupported\n");
776 else
aa650bbd
AS		 777 seq_printf(seq, "%u %sh\n", battery->alarm,
778 acpi_battery_units(battery));
4be44fcd 779 end:
b6ce4083
VL		 780 if (result)
781 seq_printf(seq, "ERROR: Unable to read battery alarm\n");
b6ce4083
VL		 782 return result;
783}
784
f1d4661a
AS		 785static ssize_t acpi_battery_write_alarm(struct file *file,
786 const char __user * buffer,
787 size_t count, loff_t * ppos)
1da177e4 788{
4be44fcd
LB		 789 int result = 0;
790 char alarm_string[12] = { '\0' };
50dd0969
JE		 791 struct seq_file *m = file->private_data;
792 struct acpi_battery *battery = m->private;
1da177e4 793
1da177e4 794 if (!battery || (count > sizeof(alarm_string) - 1))
d550d98d 795 return -EINVAL;
b6ce4083
VL		 796 if (!acpi_battery_present(battery)) {
797 result = -ENODEV;
798 goto end;
799 }
b6ce4083
VL		 800 if (copy_from_user(alarm_string, buffer, count)) {
801 result = -EFAULT;
802 goto end;
803 }
1da177e4 804 alarm_string[count] = '\0';
f1d4661a 805 battery->alarm = simple_strtol(alarm_string, NULL, 0);
aa650bbd 806 result = acpi_battery_set_alarm(battery);
b6ce4083 807 end:
b6ce4083 808 if (!result)
f1d4661a 809 return count;
78490d82
AS		 810 return result;
811}
812
813typedef int(*print_func)(struct seq_file *seq, int result);
aa650bbd
AS		 814
815static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = {
816 acpi_battery_print_info,
817 acpi_battery_print_state,
818 acpi_battery_print_alarm,
78490d82 819};
b6ce4083 820
78490d82
AS		 821static int acpi_battery_read(int fid, struct seq_file *seq)
822{
823 struct acpi_battery *battery = seq->private;
f1d4661a 824 int result = acpi_battery_update(battery);
aa650bbd 825 return acpi_print_funcs[fid](seq, result);
78490d82
AS		 826}
827
aa650bbd
AS		 828#define DECLARE_FILE_FUNCTIONS(_name) \
829static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \
830{ \
831 return acpi_battery_read(_name##_tag, seq); \
832} \
833static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \
834{ \
835 return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \
78490d82
AS		 836}
837
aa650bbd
AS		 838DECLARE_FILE_FUNCTIONS(info);
839DECLARE_FILE_FUNCTIONS(state);
840DECLARE_FILE_FUNCTIONS(alarm);
841
842#undef DECLARE_FILE_FUNCTIONS
843
844#define FILE_DESCRIPTION_RO(_name) \
845 { \
846 .name = __stringify(_name), \
847 .mode = S_IRUGO, \
848 .ops = { \
849 .open = acpi_battery_##_name##_open_fs, \
850 .read = seq_read, \
851 .llseek = seq_lseek, \
852 .release = single_release, \
853 .owner = THIS_MODULE, \
854 }, \
855 }
78490d82 856
aa650bbd
AS		 857#define FILE_DESCRIPTION_RW(_name) \
858 { \
859 .name = __stringify(_name), \
860 .mode = S_IFREG | S_IRUGO | S_IWUSR, \
861 .ops = { \
862 .open = acpi_battery_##_name##_open_fs, \
863 .read = seq_read, \
864 .llseek = seq_lseek, \
865 .write = acpi_battery_write_##_name, \
866 .release = single_release, \
867 .owner = THIS_MODULE, \
868 }, \
869 }
1da177e4 870
78490d82
AS		 871static struct battery_file {
872 struct file_operations ops;
873 mode_t mode;
070d8eb1 874 const char *name;
78490d82 875} acpi_battery_file[] = {
aa650bbd
AS		 876 FILE_DESCRIPTION_RO(info),
877 FILE_DESCRIPTION_RO(state),
878 FILE_DESCRIPTION_RW(alarm),
1da177e4
LT		 879};
880
aa650bbd
AS		 881#undef FILE_DESCRIPTION_RO
882#undef FILE_DESCRIPTION_RW
883
4be44fcd 884static int acpi_battery_add_fs(struct acpi_device *device)
1da177e4 885{
4be44fcd 886 struct proc_dir_entry *entry = NULL;
78490d82 887 int i;
1da177e4 888
6d855fcd
ZR		 889 printk(KERN_WARNING PREFIX "Deprecated procfs I/F for battery is loaded,"
890 " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
1da177e4
LT		 891 if (!acpi_device_dir(device)) {
892 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
4be44fcd 893 acpi_battery_dir);
1da177e4 894 if (!acpi_device_dir(device))
d550d98d 895 return -ENODEV;
1da177e4
LT		 896 }
897
78490d82 898 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) {
cf7acfab
DL		 899 entry = proc_create_data(acpi_battery_file[i].name,
900 acpi_battery_file[i].mode,
901 acpi_device_dir(device),
902 &acpi_battery_file[i].ops,
903 acpi_driver_data(device));
78490d82
AS		 904 if (!entry)
905 return -ENODEV;
1da177e4 906 }
d550d98d 907 return 0;
1da177e4
LT		 908}
909
aa650bbd 910static void acpi_battery_remove_fs(struct acpi_device *device)
1da177e4 911{
78490d82 912 int i;
aa650bbd
AS		 913 if (!acpi_device_dir(device))
914 return;
915 for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i)
916 remove_proc_entry(acpi_battery_file[i].name,
1da177e4 917 acpi_device_dir(device));
1da177e4 918
aa650bbd
AS		 919 remove_proc_entry(acpi_device_bid(device), acpi_battery_dir);
920 acpi_device_dir(device) = NULL;
1da177e4
LT		 921}
922
d7380965 923#endif
3e58ea0d 924
1da177e4
LT		 925/* --------------------------------------------------------------------------
926 Driver Interface
927 -------------------------------------------------------------------------- */
928
d9406691 929static void acpi_battery_notify(struct acpi_device *device, u32 event)
1da177e4 930{
d9406691 931 struct acpi_battery *battery = acpi_driver_data(device);
153e500f 932 struct device *old;
d9406691 933
1da177e4 934 if (!battery)
d550d98d 935 return;
153e500f 936 old = battery->bat.dev;
da8aeb92
RW		 937 if (event == ACPI_BATTERY_NOTIFY_INFO)
938 acpi_battery_refresh(battery);
f1d4661a
AS		 939 acpi_battery_update(battery);
940 acpi_bus_generate_proc_event(device, event,
941 acpi_battery_present(battery));
942 acpi_bus_generate_netlink_event(device->pnp.device_class,
0794469d 943 dev_name(&device->dev), event,
9ea7d575 944 acpi_battery_present(battery));
2345baf4 945 /* acpi_battery_update could remove power_supply object */
153e500f 946 if (old && battery->bat.dev)
f79e1cec 947 power_supply_changed(&battery->bat);
1da177e4
LT		 948}
949
25be5821
KM		 950static int battery_notify(struct notifier_block *nb,
951 unsigned long mode, void *_unused)
952{
953 struct acpi_battery *battery = container_of(nb, struct acpi_battery,
954 pm_nb);
955 switch (mode) {
956 case PM_POST_SUSPEND:
957 sysfs_remove_battery(battery);
958 sysfs_add_battery(battery);
959 break;
960 }
961
962 return 0;
963}
964
4be44fcd 965static int acpi_battery_add(struct acpi_device *device)
1da177e4 966{
4be44fcd 967 int result = 0;
4be44fcd 968 struct acpi_battery *battery = NULL;
c67fcd67 969 acpi_handle handle;
1da177e4 970 if (!device)
d550d98d 971 return -EINVAL;
36bcbec7 972 battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL);
1da177e4 973 if (!battery)
d550d98d 974 return -ENOMEM;
145def84 975 battery->device = device;
1da177e4
LT		 976 strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME);
977 strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS);
db89b4f0 978 device->driver_data = battery;
038fdea2 979 mutex_init(&battery->lock);
c67fcd67
AS		 980 if (ACPI_SUCCESS(acpi_get_handle(battery->device->handle,
981 "_BIX", &handle)))
982 set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags);
f1d4661a 983 acpi_battery_update(battery);
fdcedbba 984#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 985 result = acpi_battery_add_fs(device);
d7380965 986#endif
586caae3
LB		 987 if (!result) {
988 printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
989 ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
990 device->status.battery_present ? "present" : "absent");
991 } else {
fdcedbba 992#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 993 acpi_battery_remove_fs(device);
d7380965 994#endif
1da177e4
LT		 995 kfree(battery);
996 }
25be5821
KM		 997
998 battery->pm_nb.notifier_call = battery_notify;
999 register_pm_notifier(&battery->pm_nb);
1000
d550d98d 1001 return result;
1da177e4
LT		 1002}
1003
4be44fcd 1004static int acpi_battery_remove(struct acpi_device *device, int type)
1da177e4 1005{
4be44fcd 1006 struct acpi_battery *battery = NULL;
1da177e4 1007
1da177e4 1008 if (!device || !acpi_driver_data(device))
d550d98d 1009 return -EINVAL;
50dd0969 1010 battery = acpi_driver_data(device);
25be5821 1011 unregister_pm_notifier(&battery->pm_nb);
fdcedbba 1012#ifdef CONFIG_ACPI_PROCFS_POWER
1da177e4 1013 acpi_battery_remove_fs(device);
d7380965 1014#endif
508df92d 1015 sysfs_remove_battery(battery);
038fdea2 1016 mutex_destroy(&battery->lock);
1da177e4 1017 kfree(battery);
d550d98d 1018 return 0;
1da177e4
LT		 1019}
1020
34c4415a 1021/* this is needed to learn about changes made in suspended state */
5d9464a4 1022static int acpi_battery_resume(struct acpi_device *device)
34c4415a
JK		 1023{
1024 struct acpi_battery *battery;
34c4415a
JK		 1025 if (!device)
1026 return -EINVAL;
f1d4661a
AS		 1027 battery = acpi_driver_data(device);
1028 battery->update_time = 0;
508df92d 1029 acpi_battery_update(battery);
b6ce4083 1030 return 0;
34c4415a
JK		 1031}
1032
aa650bbd
AS		 1033static struct acpi_driver acpi_battery_driver = {
1034 .name = "battery",
1035 .class = ACPI_BATTERY_CLASS,
1036 .ids = battery_device_ids,
d9406691 1037 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
aa650bbd
AS		 1038 .ops = {
1039 .add = acpi_battery_add,
1040 .resume = acpi_battery_resume,
1041 .remove = acpi_battery_remove,
d9406691 1042 .notify = acpi_battery_notify,
aa650bbd
AS		 1043 },
1044};
1045
b0cbc861 1046static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie)
1da177e4 1047{
4d8316d5 1048 if (acpi_disabled)
0f66af53 1049 return;
fdcedbba 1050#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 1051 acpi_battery_dir = acpi_lock_battery_dir();
1da177e4 1052 if (!acpi_battery_dir)
0f66af53 1053 return;
d7380965 1054#endif
aa650bbd 1055 if (acpi_bus_register_driver(&acpi_battery_driver) < 0) {
fdcedbba 1056#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 1057 acpi_unlock_battery_dir(acpi_battery_dir);
d7380965 1058#endif
0f66af53 1059 return;
1da177e4 1060 }
0f66af53
AV		 1061 return;
1062}
1063
1064static int __init acpi_battery_init(void)
1065{
1066 async_schedule(acpi_battery_init_async, NULL);
d550d98d 1067 return 0;
1da177e4
LT		 1068}
1069
4be44fcd 1070static void __exit acpi_battery_exit(void)
1da177e4 1071{
1da177e4 1072 acpi_bus_unregister_driver(&acpi_battery_driver);
fdcedbba 1073#ifdef CONFIG_ACPI_PROCFS_POWER
3f86b832 1074 acpi_unlock_battery_dir(acpi_battery_dir);
d7380965 1075#endif
1da177e4
LT		 1076}
1077
1da177e4
LT		 1078module_init(acpi_battery_init);
1079module_exit(acpi_battery_exit);
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