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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> |
4000e626 | 37 | #include <asm/unaligned.h> |
d7380965 | 38 | |
8b48463f | 39 | #include <linux/acpi.h> |
d7380965 AS |
40 | #include <linux/power_supply.h> |
41 | ||
a192a958 LB |
42 | #define PREFIX "ACPI: " |
43 | ||
1da177e4 LT |
44 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
45 | ||
1da177e4 | 46 | #define ACPI_BATTERY_CLASS "battery" |
1da177e4 | 47 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
48 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
49 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
c67fcd67 | 50 | #define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82 |
1da177e4 | 51 | |
ae6f6187 LT |
52 | /* Battery power unit: 0 means mW, 1 means mA */ |
53 | #define ACPI_BATTERY_POWER_UNIT_MA 1 | |
54 | ||
1da177e4 | 55 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 56 | |
f52fd66d | 57 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 58 | |
f52fd66d | 59 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 60 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 61 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
62 | MODULE_LICENSE("GPL"); |
63 | ||
a90b4038 | 64 | static int battery_bix_broken_package; |
f1d4661a AS |
65 | static unsigned int cache_time = 1000; |
66 | module_param(cache_time, uint, 0644); | |
67 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 68 | |
1ba90e3a TR |
69 | static const struct acpi_device_id battery_device_ids[] = { |
70 | {"PNP0C0A", 0}, | |
71 | {"", 0}, | |
72 | }; | |
1ba90e3a | 73 | |
aa650bbd | 74 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 75 | |
7b3bcc4a AS |
76 | enum { |
77 | ACPI_BATTERY_ALARM_PRESENT, | |
c67fcd67 | 78 | ACPI_BATTERY_XINFO_PRESENT, |
557d5868 | 79 | ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, |
4000e626 KI |
80 | /* On Lenovo Thinkpad models from 2010 and 2011, the power unit |
81 | switches between mWh and mAh depending on whether the system | |
82 | is running on battery or not. When mAh is the unit, most | |
83 | reported values are incorrect and need to be adjusted by | |
84 | 10000/design_voltage. Verified on x201, t410, t410s, and x220. | |
85 | Pre-2010 and 2012 models appear to always report in mWh and | |
86 | are thus unaffected (tested with t42, t61, t500, x200, x300, | |
87 | and x230). Also, in mid-2012 Lenovo issued a BIOS update for | |
88 | the 2011 models that fixes the issue (tested on x220 with a | |
89 | post-1.29 BIOS), but as of Nov. 2012, no such update is | |
90 | available for the 2010 models. */ | |
91 | ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
7b3bcc4a | 92 | }; |
78490d82 | 93 | |
1da177e4 | 94 | struct acpi_battery { |
038fdea2 | 95 | struct mutex lock; |
69d94ec6 | 96 | struct mutex sysfs_lock; |
d7380965 | 97 | struct power_supply bat; |
f1d4661a | 98 | struct acpi_device *device; |
25be5821 | 99 | struct notifier_block pm_nb; |
f1d4661a | 100 | unsigned long update_time; |
016d5baa | 101 | int revision; |
7faa144a | 102 | int rate_now; |
d7380965 AS |
103 | int capacity_now; |
104 | int voltage_now; | |
038fdea2 | 105 | int design_capacity; |
d7380965 | 106 | int full_charge_capacity; |
038fdea2 AS |
107 | int technology; |
108 | int design_voltage; | |
109 | int design_capacity_warning; | |
110 | int design_capacity_low; | |
c67fcd67 AS |
111 | int cycle_count; |
112 | int measurement_accuracy; | |
113 | int max_sampling_time; | |
114 | int min_sampling_time; | |
115 | int max_averaging_interval; | |
116 | int min_averaging_interval; | |
038fdea2 AS |
117 | int capacity_granularity_1; |
118 | int capacity_granularity_2; | |
f1d4661a | 119 | int alarm; |
038fdea2 AS |
120 | char model_number[32]; |
121 | char serial_number[32]; | |
122 | char type[32]; | |
123 | char oem_info[32]; | |
f1d4661a AS |
124 | int state; |
125 | int power_unit; | |
7b3bcc4a | 126 | unsigned long flags; |
1da177e4 LT |
127 | }; |
128 | ||
497888cf | 129 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat) |
d7380965 | 130 | |
efd941f1 | 131 | static inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 132 | { |
78490d82 AS |
133 | return battery->device->status.battery_present; |
134 | } | |
038fdea2 | 135 | |
d7380965 AS |
136 | static int acpi_battery_technology(struct acpi_battery *battery) |
137 | { | |
138 | if (!strcasecmp("NiCd", battery->type)) | |
139 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
140 | if (!strcasecmp("NiMH", battery->type)) | |
141 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
142 | if (!strcasecmp("LION", battery->type)) | |
143 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 144 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 145 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
146 | if (!strcasecmp("LiP", battery->type)) |
147 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
148 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
149 | } | |
150 | ||
9104476e | 151 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 152 | |
56f382a0 RH |
153 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
154 | { | |
155 | /* either charging or discharging */ | |
156 | if (battery->state != 0) | |
157 | return 0; | |
158 | ||
159 | /* battery not reporting charge */ | |
160 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
161 | battery->capacity_now == 0) | |
162 | return 0; | |
163 | ||
164 | /* good batteries update full_charge as the batteries degrade */ | |
165 | if (battery->full_charge_capacity == battery->capacity_now) | |
166 | return 1; | |
167 | ||
168 | /* fallback to using design values for broken batteries */ | |
169 | if (battery->design_capacity == battery->capacity_now) | |
170 | return 1; | |
171 | ||
172 | /* we don't do any sort of metric based on percentages */ | |
173 | return 0; | |
174 | } | |
175 | ||
d7380965 AS |
176 | static int acpi_battery_get_property(struct power_supply *psy, |
177 | enum power_supply_property psp, | |
178 | union power_supply_propval *val) | |
179 | { | |
a1b4bd69 | 180 | int ret = 0; |
d7380965 AS |
181 | struct acpi_battery *battery = to_acpi_battery(psy); |
182 | ||
9104476e AS |
183 | if (acpi_battery_present(battery)) { |
184 | /* run battery update only if it is present */ | |
185 | acpi_battery_get_state(battery); | |
186 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
187 | return -ENODEV; |
188 | switch (psp) { | |
189 | case POWER_SUPPLY_PROP_STATUS: | |
190 | if (battery->state & 0x01) | |
191 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
192 | else if (battery->state & 0x02) | |
193 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
56f382a0 | 194 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 195 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
196 | else |
197 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
198 | break; |
199 | case POWER_SUPPLY_PROP_PRESENT: | |
200 | val->intval = acpi_battery_present(battery); | |
201 | break; | |
202 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
203 | val->intval = acpi_battery_technology(battery); | |
204 | break; | |
c67fcd67 AS |
205 | case POWER_SUPPLY_PROP_CYCLE_COUNT: |
206 | val->intval = battery->cycle_count; | |
207 | break; | |
d7380965 | 208 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: |
a1b4bd69 RW |
209 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
210 | ret = -ENODEV; | |
211 | else | |
212 | val->intval = battery->design_voltage * 1000; | |
d7380965 AS |
213 | break; |
214 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
a1b4bd69 RW |
215 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) |
216 | ret = -ENODEV; | |
217 | else | |
218 | val->intval = battery->voltage_now * 1000; | |
d7380965 AS |
219 | break; |
220 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a | 221 | case POWER_SUPPLY_PROP_POWER_NOW: |
a1b4bd69 RW |
222 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
223 | ret = -ENODEV; | |
224 | else | |
225 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
226 | break; |
227 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
228 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
a1b4bd69 RW |
229 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
230 | ret = -ENODEV; | |
231 | else | |
232 | val->intval = battery->design_capacity * 1000; | |
d7380965 AS |
233 | break; |
234 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
235 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
a1b4bd69 RW |
236 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
237 | ret = -ENODEV; | |
238 | else | |
239 | val->intval = battery->full_charge_capacity * 1000; | |
d7380965 AS |
240 | break; |
241 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
242 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
a1b4bd69 RW |
243 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
244 | ret = -ENODEV; | |
245 | else | |
246 | val->intval = battery->capacity_now * 1000; | |
d7380965 | 247 | break; |
a58e1150 | 248 | case POWER_SUPPLY_PROP_CAPACITY: |
249 | if (battery->capacity_now && battery->full_charge_capacity) | |
250 | val->intval = battery->capacity_now * 100/ | |
251 | battery->full_charge_capacity; | |
252 | else | |
253 | val->intval = 0; | |
254 | break; | |
d7380965 AS |
255 | case POWER_SUPPLY_PROP_MODEL_NAME: |
256 | val->strval = battery->model_number; | |
257 | break; | |
258 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
259 | val->strval = battery->oem_info; | |
260 | break; | |
7c2670bb | 261 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
262 | val->strval = battery->serial_number; | |
263 | break; | |
d7380965 | 264 | default: |
a1b4bd69 | 265 | ret = -EINVAL; |
d7380965 | 266 | } |
a1b4bd69 | 267 | return ret; |
d7380965 AS |
268 | } |
269 | ||
270 | static enum power_supply_property charge_battery_props[] = { | |
271 | POWER_SUPPLY_PROP_STATUS, | |
272 | POWER_SUPPLY_PROP_PRESENT, | |
273 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 274 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
275 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
276 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
277 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
278 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
279 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
280 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
a58e1150 | 281 | POWER_SUPPLY_PROP_CAPACITY, |
d7380965 AS |
282 | POWER_SUPPLY_PROP_MODEL_NAME, |
283 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 284 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
285 | }; |
286 | ||
287 | static enum power_supply_property energy_battery_props[] = { | |
288 | POWER_SUPPLY_PROP_STATUS, | |
289 | POWER_SUPPLY_PROP_PRESENT, | |
290 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
c67fcd67 | 291 | POWER_SUPPLY_PROP_CYCLE_COUNT, |
d7380965 AS |
292 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, |
293 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
7faa144a | 294 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
295 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
296 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
297 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
a58e1150 | 298 | POWER_SUPPLY_PROP_CAPACITY, |
d7380965 AS |
299 | POWER_SUPPLY_PROP_MODEL_NAME, |
300 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 301 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
302 | }; |
303 | ||
78490d82 AS |
304 | /* -------------------------------------------------------------------------- |
305 | Battery Management | |
306 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
307 | struct acpi_offsets { |
308 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
309 | u8 mode; /* int or string? */ | |
310 | }; | |
b6ce4083 | 311 | |
038fdea2 AS |
312 | static struct acpi_offsets state_offsets[] = { |
313 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 314 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
315 | {offsetof(struct acpi_battery, capacity_now), 0}, |
316 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 317 | }; |
b6ce4083 | 318 | |
038fdea2 AS |
319 | static struct acpi_offsets info_offsets[] = { |
320 | {offsetof(struct acpi_battery, power_unit), 0}, | |
321 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 322 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
323 | {offsetof(struct acpi_battery, technology), 0}, |
324 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
325 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
326 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
327 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
328 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
329 | {offsetof(struct acpi_battery, model_number), 1}, | |
330 | {offsetof(struct acpi_battery, serial_number), 1}, | |
331 | {offsetof(struct acpi_battery, type), 1}, | |
332 | {offsetof(struct acpi_battery, oem_info), 1}, | |
333 | }; | |
b6ce4083 | 334 | |
c67fcd67 | 335 | static struct acpi_offsets extended_info_offsets[] = { |
016d5baa | 336 | {offsetof(struct acpi_battery, revision), 0}, |
c67fcd67 AS |
337 | {offsetof(struct acpi_battery, power_unit), 0}, |
338 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
339 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, | |
340 | {offsetof(struct acpi_battery, technology), 0}, | |
341 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
342 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
343 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
344 | {offsetof(struct acpi_battery, cycle_count), 0}, | |
345 | {offsetof(struct acpi_battery, measurement_accuracy), 0}, | |
346 | {offsetof(struct acpi_battery, max_sampling_time), 0}, | |
347 | {offsetof(struct acpi_battery, min_sampling_time), 0}, | |
348 | {offsetof(struct acpi_battery, max_averaging_interval), 0}, | |
349 | {offsetof(struct acpi_battery, min_averaging_interval), 0}, | |
350 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
351 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
352 | {offsetof(struct acpi_battery, model_number), 1}, | |
353 | {offsetof(struct acpi_battery, serial_number), 1}, | |
354 | {offsetof(struct acpi_battery, type), 1}, | |
355 | {offsetof(struct acpi_battery, oem_info), 1}, | |
356 | }; | |
357 | ||
038fdea2 AS |
358 | static int extract_package(struct acpi_battery *battery, |
359 | union acpi_object *package, | |
360 | struct acpi_offsets *offsets, int num) | |
361 | { | |
106449e8 | 362 | int i; |
038fdea2 AS |
363 | union acpi_object *element; |
364 | if (package->type != ACPI_TYPE_PACKAGE) | |
365 | return -EFAULT; | |
366 | for (i = 0; i < num; ++i) { | |
367 | if (package->package.count <= i) | |
368 | return -EFAULT; | |
369 | element = &package->package.elements[i]; | |
370 | if (offsets[i].mode) { | |
106449e8 AS |
371 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
372 | if (element->type == ACPI_TYPE_STRING || | |
373 | element->type == ACPI_TYPE_BUFFER) | |
374 | strncpy(ptr, element->string.pointer, 32); | |
375 | else if (element->type == ACPI_TYPE_INTEGER) { | |
376 | strncpy(ptr, (u8 *)&element->integer.value, | |
439913ff LM |
377 | sizeof(u64)); |
378 | ptr[sizeof(u64)] = 0; | |
b8a1bdb1 AS |
379 | } else |
380 | *ptr = 0; /* don't have value */ | |
038fdea2 | 381 | } else { |
b8a1bdb1 AS |
382 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
383 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
384 | element->integer.value : -1; | |
038fdea2 | 385 | } |
b6ce4083 | 386 | } |
b6ce4083 VL |
387 | return 0; |
388 | } | |
389 | ||
390 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
391 | { | |
aa650bbd | 392 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
393 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
394 | return -ENODEV; | |
395 | } | |
aa650bbd | 396 | return 0; |
b6ce4083 VL |
397 | } |
398 | ||
399 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 400 | { |
aa650bbd | 401 | int result = -EFAULT; |
4be44fcd | 402 | acpi_status status = 0; |
0f4c6547 | 403 | char *name = test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags) ? |
c67fcd67 AS |
404 | "_BIX" : "_BIF"; |
405 | ||
4be44fcd | 406 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 407 | |
b6ce4083 VL |
408 | if (!acpi_battery_present(battery)) |
409 | return 0; | |
038fdea2 | 410 | mutex_lock(&battery->lock); |
c67fcd67 AS |
411 | status = acpi_evaluate_object(battery->device->handle, name, |
412 | NULL, &buffer); | |
038fdea2 | 413 | mutex_unlock(&battery->lock); |
aa650bbd | 414 | |
1da177e4 | 415 | if (ACPI_FAILURE(status)) { |
c67fcd67 | 416 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating %s", name)); |
d550d98d | 417 | return -ENODEV; |
1da177e4 | 418 | } |
a90b4038 LT |
419 | |
420 | if (battery_bix_broken_package) | |
421 | result = extract_package(battery, buffer.pointer, | |
422 | extended_info_offsets + 1, | |
423 | ARRAY_SIZE(extended_info_offsets) - 1); | |
424 | else if (test_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags)) | |
c67fcd67 AS |
425 | result = extract_package(battery, buffer.pointer, |
426 | extended_info_offsets, | |
427 | ARRAY_SIZE(extended_info_offsets)); | |
428 | else | |
429 | result = extract_package(battery, buffer.pointer, | |
430 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 431 | kfree(buffer.pointer); |
557d5868 ZR |
432 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) |
433 | battery->full_charge_capacity = battery->design_capacity; | |
4000e626 KI |
434 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
435 | battery->power_unit && battery->design_voltage) { | |
436 | battery->design_capacity = battery->design_capacity * | |
437 | 10000 / battery->design_voltage; | |
438 | battery->full_charge_capacity = battery->full_charge_capacity * | |
439 | 10000 / battery->design_voltage; | |
440 | battery->design_capacity_warning = | |
441 | battery->design_capacity_warning * | |
442 | 10000 / battery->design_voltage; | |
443 | /* Curiously, design_capacity_low, unlike the rest of them, | |
444 | is correct. */ | |
445 | /* capacity_granularity_* equal 1 on the systems tested, so | |
446 | it's impossible to tell if they would need an adjustment | |
447 | or not if their values were higher. */ | |
448 | } | |
d550d98d | 449 | return result; |
1da177e4 LT |
450 | } |
451 | ||
b6ce4083 | 452 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 453 | { |
4be44fcd LB |
454 | int result = 0; |
455 | acpi_status status = 0; | |
456 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 457 | |
b6ce4083 VL |
458 | if (!acpi_battery_present(battery)) |
459 | return 0; | |
1da177e4 | 460 | |
f1d4661a AS |
461 | if (battery->update_time && |
462 | time_before(jiffies, battery->update_time + | |
463 | msecs_to_jiffies(cache_time))) | |
464 | return 0; | |
465 | ||
038fdea2 | 466 | mutex_lock(&battery->lock); |
f1d4661a | 467 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
468 | NULL, &buffer); |
469 | mutex_unlock(&battery->lock); | |
5b31d895 | 470 | |
1da177e4 | 471 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 472 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 473 | return -ENODEV; |
1da177e4 | 474 | } |
aa650bbd | 475 | |
038fdea2 AS |
476 | result = extract_package(battery, buffer.pointer, |
477 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 478 | battery->update_time = jiffies; |
78490d82 | 479 | kfree(buffer.pointer); |
bc76f90b | 480 | |
55003b21 LT |
481 | /* For buggy DSDTs that report negative 16-bit values for either |
482 | * charging or discharging current and/or report 0 as 65536 | |
483 | * due to bad math. | |
484 | */ | |
485 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA && | |
486 | battery->rate_now != ACPI_BATTERY_VALUE_UNKNOWN && | |
487 | (s16)(battery->rate_now) < 0) { | |
bc76f90b | 488 | battery->rate_now = abs((s16)battery->rate_now); |
55003b21 LT |
489 | printk_once(KERN_WARNING FW_BUG "battery: (dis)charge rate" |
490 | " invalid.\n"); | |
491 | } | |
bc76f90b | 492 | |
557d5868 ZR |
493 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags) |
494 | && battery->capacity_now >= 0 && battery->capacity_now <= 100) | |
495 | battery->capacity_now = (battery->capacity_now * | |
496 | battery->full_charge_capacity) / 100; | |
4000e626 KI |
497 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags) && |
498 | battery->power_unit && battery->design_voltage) { | |
499 | battery->capacity_now = battery->capacity_now * | |
500 | 10000 / battery->design_voltage; | |
501 | } | |
b6ce4083 VL |
502 | return result; |
503 | } | |
1da177e4 | 504 | |
aa650bbd | 505 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 506 | { |
4be44fcd | 507 | acpi_status status = 0; |
1da177e4 | 508 | |
c67fcd67 | 509 | if (!acpi_battery_present(battery) || |
7b3bcc4a | 510 | !test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags)) |
d550d98d | 511 | return -ENODEV; |
1da177e4 | 512 | |
038fdea2 | 513 | mutex_lock(&battery->lock); |
0db98202 JL |
514 | status = acpi_execute_simple_method(battery->device->handle, "_BTP", |
515 | battery->alarm); | |
038fdea2 | 516 | mutex_unlock(&battery->lock); |
aa650bbd | 517 | |
1da177e4 | 518 | if (ACPI_FAILURE(status)) |
d550d98d | 519 | return -ENODEV; |
1da177e4 | 520 | |
aa650bbd | 521 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 522 | return 0; |
1da177e4 LT |
523 | } |
524 | ||
b6ce4083 | 525 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 526 | { |
b6ce4083 | 527 | /* See if alarms are supported, and if so, set default */ |
952c63e9 | 528 | if (!acpi_has_method(battery->device->handle, "_BTP")) { |
7b3bcc4a | 529 | clear_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a | 530 | return 0; |
b6ce4083 | 531 | } |
7b3bcc4a | 532 | set_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags); |
f1d4661a AS |
533 | if (!battery->alarm) |
534 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 535 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 536 | } |
1da177e4 | 537 | |
508df92d AB |
538 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
539 | struct device_attribute *attr, | |
540 | char *buf) | |
541 | { | |
542 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
543 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
544 | } | |
545 | ||
546 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
547 | struct device_attribute *attr, | |
548 | const char *buf, size_t count) | |
549 | { | |
550 | unsigned long x; | |
551 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
47a08c85 | 552 | if (sscanf(buf, "%lu\n", &x) == 1) |
508df92d AB |
553 | battery->alarm = x/1000; |
554 | if (acpi_battery_present(battery)) | |
555 | acpi_battery_set_alarm(battery); | |
556 | return count; | |
557 | } | |
558 | ||
559 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 560 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
561 | .show = acpi_battery_alarm_show, |
562 | .store = acpi_battery_alarm_store, | |
563 | }; | |
564 | ||
565 | static int sysfs_add_battery(struct acpi_battery *battery) | |
566 | { | |
567 | int result; | |
568 | ||
ae6f6187 | 569 | if (battery->power_unit == ACPI_BATTERY_POWER_UNIT_MA) { |
508df92d AB |
570 | battery->bat.properties = charge_battery_props; |
571 | battery->bat.num_properties = | |
572 | ARRAY_SIZE(charge_battery_props); | |
573 | } else { | |
574 | battery->bat.properties = energy_battery_props; | |
575 | battery->bat.num_properties = | |
576 | ARRAY_SIZE(energy_battery_props); | |
577 | } | |
578 | ||
579 | battery->bat.name = acpi_device_bid(battery->device); | |
580 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
581 | battery->bat.get_property = acpi_battery_get_property; | |
582 | ||
583 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
584 | if (result) | |
585 | return result; | |
586 | return device_create_file(battery->bat.dev, &alarm_attr); | |
587 | } | |
588 | ||
589 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
590 | { | |
69d94ec6 | 591 | mutex_lock(&battery->sysfs_lock); |
9c921c22 | 592 | if (!battery->bat.dev) { |
69d94ec6 | 593 | mutex_unlock(&battery->sysfs_lock); |
508df92d | 594 | return; |
9c921c22 LT |
595 | } |
596 | ||
508df92d AB |
597 | device_remove_file(battery->bat.dev, &alarm_attr); |
598 | power_supply_unregister(&battery->bat); | |
9104476e | 599 | battery->bat.dev = NULL; |
69d94ec6 | 600 | mutex_unlock(&battery->sysfs_lock); |
bc76f90b HM |
601 | } |
602 | ||
4000e626 KI |
603 | static void find_battery(const struct dmi_header *dm, void *private) |
604 | { | |
605 | struct acpi_battery *battery = (struct acpi_battery *)private; | |
606 | /* Note: the hardcoded offsets below have been extracted from | |
607 | the source code of dmidecode. */ | |
608 | if (dm->type == DMI_ENTRY_PORTABLE_BATTERY && dm->length >= 8) { | |
609 | const u8 *dmi_data = (const u8 *)(dm + 1); | |
610 | int dmi_capacity = get_unaligned((const u16 *)(dmi_data + 6)); | |
611 | if (dm->length >= 18) | |
612 | dmi_capacity *= dmi_data[17]; | |
613 | if (battery->design_capacity * battery->design_voltage / 1000 | |
614 | != dmi_capacity && | |
615 | battery->design_capacity * 10 == dmi_capacity) | |
616 | set_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
617 | &battery->flags); | |
618 | } | |
619 | } | |
620 | ||
557d5868 ZR |
621 | /* |
622 | * According to the ACPI spec, some kinds of primary batteries can | |
623 | * report percentage battery remaining capacity directly to OS. | |
624 | * In this case, it reports the Last Full Charged Capacity == 100 | |
625 | * and BatteryPresentRate == 0xFFFFFFFF. | |
626 | * | |
627 | * Now we found some battery reports percentage remaining capacity | |
628 | * even if it's rechargeable. | |
629 | * https://bugzilla.kernel.org/show_bug.cgi?id=15979 | |
630 | * | |
631 | * Handle this correctly so that they won't break userspace. | |
632 | */ | |
7b78622d | 633 | static void acpi_battery_quirks(struct acpi_battery *battery) |
557d5868 ZR |
634 | { |
635 | if (test_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags)) | |
0f4c6547 | 636 | return; |
557d5868 | 637 | |
0f4c6547 NM |
638 | if (battery->full_charge_capacity == 100 && |
639 | battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN && | |
640 | battery->capacity_now >= 0 && battery->capacity_now <= 100) { | |
557d5868 ZR |
641 | set_bit(ACPI_BATTERY_QUIRK_PERCENTAGE_CAPACITY, &battery->flags); |
642 | battery->full_charge_capacity = battery->design_capacity; | |
643 | battery->capacity_now = (battery->capacity_now * | |
644 | battery->full_charge_capacity) / 100; | |
645 | } | |
4000e626 KI |
646 | |
647 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, &battery->flags)) | |
0f4c6547 | 648 | return; |
4000e626 KI |
649 | |
650 | if (battery->power_unit && dmi_name_in_vendors("LENOVO")) { | |
651 | const char *s; | |
652 | s = dmi_get_system_info(DMI_PRODUCT_VERSION); | |
653 | if (s && !strnicmp(s, "ThinkPad", 8)) { | |
654 | dmi_walk(find_battery, battery); | |
655 | if (test_bit(ACPI_BATTERY_QUIRK_THINKPAD_MAH, | |
656 | &battery->flags) && | |
657 | battery->design_voltage) { | |
658 | battery->design_capacity = | |
659 | battery->design_capacity * | |
660 | 10000 / battery->design_voltage; | |
661 | battery->full_charge_capacity = | |
662 | battery->full_charge_capacity * | |
663 | 10000 / battery->design_voltage; | |
664 | battery->design_capacity_warning = | |
665 | battery->design_capacity_warning * | |
666 | 10000 / battery->design_voltage; | |
667 | battery->capacity_now = battery->capacity_now * | |
668 | 10000 / battery->design_voltage; | |
669 | } | |
670 | } | |
671 | } | |
557d5868 ZR |
672 | } |
673 | ||
f1d4661a | 674 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 675 | { |
50b17851 | 676 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 677 | result = acpi_battery_get_status(battery); |
508df92d | 678 | if (result) |
b6ce4083 | 679 | return result; |
508df92d AB |
680 | if (!acpi_battery_present(battery)) { |
681 | sysfs_remove_battery(battery); | |
97749cd9 | 682 | battery->update_time = 0; |
508df92d | 683 | return 0; |
b6ce4083 | 684 | } |
50b17851 AS |
685 | if (!battery->update_time || |
686 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
687 | result = acpi_battery_get_info(battery); |
688 | if (result) | |
689 | return result; | |
690 | acpi_battery_init_alarm(battery); | |
691 | } | |
eb03cb02 SH |
692 | if (!battery->bat.dev) { |
693 | result = sysfs_add_battery(battery); | |
694 | if (result) | |
695 | return result; | |
696 | } | |
557d5868 | 697 | result = acpi_battery_get_state(battery); |
7b78622d | 698 | acpi_battery_quirks(battery); |
557d5868 | 699 | return result; |
4bd35cdb VL |
700 | } |
701 | ||
da8aeb92 RW |
702 | static void acpi_battery_refresh(struct acpi_battery *battery) |
703 | { | |
c5971456 AW |
704 | int power_unit; |
705 | ||
da8aeb92 RW |
706 | if (!battery->bat.dev) |
707 | return; | |
708 | ||
c5971456 AW |
709 | power_unit = battery->power_unit; |
710 | ||
da8aeb92 | 711 | acpi_battery_get_info(battery); |
c5971456 AW |
712 | |
713 | if (power_unit == battery->power_unit) | |
714 | return; | |
715 | ||
716 | /* The battery has changed its reporting units. */ | |
da8aeb92 RW |
717 | sysfs_remove_battery(battery); |
718 | sysfs_add_battery(battery); | |
719 | } | |
720 | ||
1da177e4 LT |
721 | /* -------------------------------------------------------------------------- |
722 | Driver Interface | |
723 | -------------------------------------------------------------------------- */ | |
724 | ||
d9406691 | 725 | static void acpi_battery_notify(struct acpi_device *device, u32 event) |
1da177e4 | 726 | { |
d9406691 | 727 | struct acpi_battery *battery = acpi_driver_data(device); |
153e500f | 728 | struct device *old; |
d9406691 | 729 | |
1da177e4 | 730 | if (!battery) |
d550d98d | 731 | return; |
153e500f | 732 | old = battery->bat.dev; |
da8aeb92 RW |
733 | if (event == ACPI_BATTERY_NOTIFY_INFO) |
734 | acpi_battery_refresh(battery); | |
f1d4661a | 735 | acpi_battery_update(battery); |
f1d4661a | 736 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 737 | dev_name(&device->dev), event, |
9ea7d575 | 738 | acpi_battery_present(battery)); |
2345baf4 | 739 | /* acpi_battery_update could remove power_supply object */ |
153e500f | 740 | if (old && battery->bat.dev) |
f79e1cec | 741 | power_supply_changed(&battery->bat); |
1da177e4 LT |
742 | } |
743 | ||
25be5821 KM |
744 | static int battery_notify(struct notifier_block *nb, |
745 | unsigned long mode, void *_unused) | |
746 | { | |
747 | struct acpi_battery *battery = container_of(nb, struct acpi_battery, | |
748 | pm_nb); | |
749 | switch (mode) { | |
d5a5911b | 750 | case PM_POST_HIBERNATION: |
25be5821 | 751 | case PM_POST_SUSPEND: |
6e17fb6a LT |
752 | if (battery->bat.dev) { |
753 | sysfs_remove_battery(battery); | |
754 | sysfs_add_battery(battery); | |
755 | } | |
25be5821 KM |
756 | break; |
757 | } | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
a90b4038 LT |
762 | static struct dmi_system_id bat_dmi_table[] = { |
763 | { | |
764 | .ident = "NEC LZ750/LS", | |
765 | .matches = { | |
766 | DMI_MATCH(DMI_SYS_VENDOR, "NEC"), | |
767 | DMI_MATCH(DMI_PRODUCT_NAME, "PC-LZ750LS"), | |
768 | }, | |
769 | }, | |
770 | {}, | |
771 | }; | |
772 | ||
4be44fcd | 773 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 774 | { |
4be44fcd | 775 | int result = 0; |
4be44fcd | 776 | struct acpi_battery *battery = NULL; |
952c63e9 | 777 | |
1da177e4 | 778 | if (!device) |
d550d98d | 779 | return -EINVAL; |
36bcbec7 | 780 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 781 | if (!battery) |
d550d98d | 782 | return -ENOMEM; |
145def84 | 783 | battery->device = device; |
1da177e4 LT |
784 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
785 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 786 | device->driver_data = battery; |
038fdea2 | 787 | mutex_init(&battery->lock); |
69d94ec6 | 788 | mutex_init(&battery->sysfs_lock); |
952c63e9 | 789 | if (acpi_has_method(battery->device->handle, "_BIX")) |
c67fcd67 | 790 | set_bit(ACPI_BATTERY_XINFO_PRESENT, &battery->flags); |
eb03cb02 SH |
791 | result = acpi_battery_update(battery); |
792 | if (result) | |
793 | goto fail; | |
25be5821 | 794 | |
e80bba4b SH |
795 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
796 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), | |
797 | device->status.battery_present ? "present" : "absent"); | |
798 | ||
25be5821 KM |
799 | battery->pm_nb.notifier_call = battery_notify; |
800 | register_pm_notifier(&battery->pm_nb); | |
801 | ||
d550d98d | 802 | return result; |
e80bba4b SH |
803 | |
804 | fail: | |
805 | sysfs_remove_battery(battery); | |
806 | mutex_destroy(&battery->lock); | |
69d94ec6 | 807 | mutex_destroy(&battery->sysfs_lock); |
e80bba4b SH |
808 | kfree(battery); |
809 | return result; | |
1da177e4 LT |
810 | } |
811 | ||
51fac838 | 812 | static int acpi_battery_remove(struct acpi_device *device) |
1da177e4 | 813 | { |
4be44fcd | 814 | struct acpi_battery *battery = NULL; |
1da177e4 | 815 | |
1da177e4 | 816 | if (!device || !acpi_driver_data(device)) |
d550d98d | 817 | return -EINVAL; |
50dd0969 | 818 | battery = acpi_driver_data(device); |
25be5821 | 819 | unregister_pm_notifier(&battery->pm_nb); |
508df92d | 820 | sysfs_remove_battery(battery); |
038fdea2 | 821 | mutex_destroy(&battery->lock); |
69d94ec6 | 822 | mutex_destroy(&battery->sysfs_lock); |
1da177e4 | 823 | kfree(battery); |
d550d98d | 824 | return 0; |
1da177e4 LT |
825 | } |
826 | ||
90692404 | 827 | #ifdef CONFIG_PM_SLEEP |
34c4415a | 828 | /* this is needed to learn about changes made in suspended state */ |
a6f50dc8 | 829 | static int acpi_battery_resume(struct device *dev) |
34c4415a JK |
830 | { |
831 | struct acpi_battery *battery; | |
a6f50dc8 RW |
832 | |
833 | if (!dev) | |
34c4415a | 834 | return -EINVAL; |
a6f50dc8 RW |
835 | |
836 | battery = acpi_driver_data(to_acpi_device(dev)); | |
837 | if (!battery) | |
838 | return -EINVAL; | |
839 | ||
f1d4661a | 840 | battery->update_time = 0; |
508df92d | 841 | acpi_battery_update(battery); |
b6ce4083 | 842 | return 0; |
34c4415a | 843 | } |
7f6895c6 SK |
844 | #else |
845 | #define acpi_battery_resume NULL | |
90692404 | 846 | #endif |
34c4415a | 847 | |
a6f50dc8 RW |
848 | static SIMPLE_DEV_PM_OPS(acpi_battery_pm, NULL, acpi_battery_resume); |
849 | ||
aa650bbd AS |
850 | static struct acpi_driver acpi_battery_driver = { |
851 | .name = "battery", | |
852 | .class = ACPI_BATTERY_CLASS, | |
853 | .ids = battery_device_ids, | |
d9406691 | 854 | .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, |
aa650bbd AS |
855 | .ops = { |
856 | .add = acpi_battery_add, | |
aa650bbd | 857 | .remove = acpi_battery_remove, |
d9406691 | 858 | .notify = acpi_battery_notify, |
aa650bbd | 859 | }, |
a6f50dc8 | 860 | .drv.pm = &acpi_battery_pm, |
aa650bbd AS |
861 | }; |
862 | ||
b0cbc861 | 863 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 864 | { |
4d8316d5 | 865 | if (acpi_disabled) |
0f66af53 | 866 | return; |
a90b4038 LT |
867 | |
868 | if (dmi_check_system(bat_dmi_table)) | |
869 | battery_bix_broken_package = 1; | |
1e2d9cdf | 870 | acpi_bus_register_driver(&acpi_battery_driver); |
0f66af53 AV |
871 | } |
872 | ||
873 | static int __init acpi_battery_init(void) | |
874 | { | |
875 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 876 | return 0; |
1da177e4 LT |
877 | } |
878 | ||
4be44fcd | 879 | static void __exit acpi_battery_exit(void) |
1da177e4 | 880 | { |
1da177e4 | 881 | acpi_bus_unregister_driver(&acpi_battery_driver); |
1da177e4 LT |
882 | } |
883 | ||
1da177e4 LT |
884 | module_init(acpi_battery_init); |
885 | module_exit(acpi_battery_exit); |