Commit | Line | Data |
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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> |
d7380965 | 33 | |
fdcedbba | 34 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
35 | #include <linux/proc_fs.h> |
36 | #include <linux/seq_file.h> | |
37 | #include <asm/uaccess.h> | |
d7380965 | 38 | #endif |
1da177e4 LT |
39 | |
40 | #include <acpi/acpi_bus.h> | |
41 | #include <acpi/acpi_drivers.h> | |
42 | ||
97749cd9 | 43 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 | 44 | #include <linux/power_supply.h> |
97749cd9 | 45 | #endif |
d7380965 | 46 | |
1da177e4 LT |
47 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
48 | ||
1da177e4 | 49 | #define ACPI_BATTERY_CLASS "battery" |
1da177e4 | 50 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
51 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
52 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
1da177e4 | 53 | |
1da177e4 | 54 | #define _COMPONENT ACPI_BATTERY_COMPONENT |
b6ce4083 | 55 | |
f52fd66d | 56 | ACPI_MODULE_NAME("battery"); |
1da177e4 | 57 | |
f52fd66d | 58 | MODULE_AUTHOR("Paul Diefenbaugh"); |
aa650bbd | 59 | MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); |
7cda93e0 | 60 | MODULE_DESCRIPTION("ACPI Battery Driver"); |
1da177e4 LT |
61 | MODULE_LICENSE("GPL"); |
62 | ||
f1d4661a AS |
63 | static unsigned int cache_time = 1000; |
64 | module_param(cache_time, uint, 0644); | |
65 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 66 | |
fdcedbba | 67 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
68 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
69 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
70 | ||
d7380965 AS |
71 | enum acpi_battery_files { |
72 | info_tag = 0, | |
73 | state_tag, | |
74 | alarm_tag, | |
75 | ACPI_BATTERY_NUMFILES, | |
76 | }; | |
77 | ||
78 | #endif | |
79 | ||
1ba90e3a TR |
80 | static const struct acpi_device_id battery_device_ids[] = { |
81 | {"PNP0C0A", 0}, | |
82 | {"", 0}, | |
83 | }; | |
1ba90e3a | 84 | |
aa650bbd | 85 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 86 | |
78490d82 | 87 | |
1da177e4 | 88 | struct acpi_battery { |
038fdea2 | 89 | struct mutex lock; |
97749cd9 | 90 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 | 91 | struct power_supply bat; |
97749cd9 | 92 | #endif |
f1d4661a AS |
93 | struct acpi_device *device; |
94 | unsigned long update_time; | |
d7380965 AS |
95 | int current_now; |
96 | int capacity_now; | |
97 | int voltage_now; | |
038fdea2 | 98 | int design_capacity; |
d7380965 | 99 | int full_charge_capacity; |
038fdea2 AS |
100 | int technology; |
101 | int design_voltage; | |
102 | int design_capacity_warning; | |
103 | int design_capacity_low; | |
104 | int capacity_granularity_1; | |
105 | int capacity_granularity_2; | |
f1d4661a | 106 | int alarm; |
038fdea2 AS |
107 | char model_number[32]; |
108 | char serial_number[32]; | |
109 | char type[32]; | |
110 | char oem_info[32]; | |
f1d4661a AS |
111 | int state; |
112 | int power_unit; | |
038fdea2 | 113 | u8 alarm_present; |
1da177e4 LT |
114 | }; |
115 | ||
d7380965 AS |
116 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); |
117 | ||
78490d82 | 118 | inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 119 | { |
78490d82 AS |
120 | return battery->device->status.battery_present; |
121 | } | |
038fdea2 | 122 | |
97749cd9 | 123 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 AS |
124 | static int acpi_battery_technology(struct acpi_battery *battery) |
125 | { | |
126 | if (!strcasecmp("NiCd", battery->type)) | |
127 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
128 | if (!strcasecmp("NiMH", battery->type)) | |
129 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
130 | if (!strcasecmp("LION", battery->type)) | |
131 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 132 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 133 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
134 | if (!strcasecmp("LiP", battery->type)) |
135 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
136 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
137 | } | |
138 | ||
9104476e | 139 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 140 | |
d7380965 AS |
141 | static int acpi_battery_get_property(struct power_supply *psy, |
142 | enum power_supply_property psp, | |
143 | union power_supply_propval *val) | |
144 | { | |
145 | struct acpi_battery *battery = to_acpi_battery(psy); | |
146 | ||
9104476e AS |
147 | if (acpi_battery_present(battery)) { |
148 | /* run battery update only if it is present */ | |
149 | acpi_battery_get_state(battery); | |
150 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
151 | return -ENODEV; |
152 | switch (psp) { | |
153 | case POWER_SUPPLY_PROP_STATUS: | |
154 | if (battery->state & 0x01) | |
155 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
156 | else if (battery->state & 0x02) | |
157 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
158 | else if (battery->state == 0) | |
159 | val->intval = POWER_SUPPLY_STATUS_FULL; | |
4c41d3ad RD |
160 | else |
161 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
162 | break; |
163 | case POWER_SUPPLY_PROP_PRESENT: | |
164 | val->intval = acpi_battery_present(battery); | |
165 | break; | |
166 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
167 | val->intval = acpi_battery_technology(battery); | |
168 | break; | |
169 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
170 | val->intval = battery->design_voltage * 1000; | |
171 | break; | |
172 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
173 | val->intval = battery->voltage_now * 1000; | |
174 | break; | |
175 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
f10a3a32 | 176 | val->intval = battery->current_now * 1000; |
d7380965 AS |
177 | break; |
178 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
179 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
180 | val->intval = battery->design_capacity * 1000; | |
181 | break; | |
182 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
183 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
184 | val->intval = battery->full_charge_capacity * 1000; | |
185 | break; | |
186 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
187 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
188 | val->intval = battery->capacity_now * 1000; | |
189 | break; | |
190 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
191 | val->strval = battery->model_number; | |
192 | break; | |
193 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
194 | val->strval = battery->oem_info; | |
195 | break; | |
7c2670bb | 196 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
197 | val->strval = battery->serial_number; | |
198 | break; | |
d7380965 AS |
199 | default: |
200 | return -EINVAL; | |
201 | } | |
202 | return 0; | |
203 | } | |
204 | ||
205 | static enum power_supply_property charge_battery_props[] = { | |
206 | POWER_SUPPLY_PROP_STATUS, | |
207 | POWER_SUPPLY_PROP_PRESENT, | |
208 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
209 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
210 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
211 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
212 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
213 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
214 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
215 | POWER_SUPPLY_PROP_MODEL_NAME, | |
216 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 217 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
218 | }; |
219 | ||
220 | static enum power_supply_property energy_battery_props[] = { | |
221 | POWER_SUPPLY_PROP_STATUS, | |
222 | POWER_SUPPLY_PROP_PRESENT, | |
223 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
224 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
225 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
226 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
227 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
228 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
229 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
230 | POWER_SUPPLY_PROP_MODEL_NAME, | |
231 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 232 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 | 233 | }; |
97749cd9 | 234 | #endif |
d7380965 | 235 | |
fdcedbba | 236 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 237 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 238 | { |
f1d4661a | 239 | return (battery->power_unit)?"mA":"mW"; |
b6ce4083 | 240 | } |
d7380965 | 241 | #endif |
b6ce4083 | 242 | |
78490d82 AS |
243 | /* -------------------------------------------------------------------------- |
244 | Battery Management | |
245 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
246 | struct acpi_offsets { |
247 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
248 | u8 mode; /* int or string? */ | |
249 | }; | |
b6ce4083 | 250 | |
038fdea2 AS |
251 | static struct acpi_offsets state_offsets[] = { |
252 | {offsetof(struct acpi_battery, state), 0}, | |
d7380965 AS |
253 | {offsetof(struct acpi_battery, current_now), 0}, |
254 | {offsetof(struct acpi_battery, capacity_now), 0}, | |
255 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 256 | }; |
b6ce4083 | 257 | |
038fdea2 AS |
258 | static struct acpi_offsets info_offsets[] = { |
259 | {offsetof(struct acpi_battery, power_unit), 0}, | |
260 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 261 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
262 | {offsetof(struct acpi_battery, technology), 0}, |
263 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
264 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
265 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
266 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
267 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
268 | {offsetof(struct acpi_battery, model_number), 1}, | |
269 | {offsetof(struct acpi_battery, serial_number), 1}, | |
270 | {offsetof(struct acpi_battery, type), 1}, | |
271 | {offsetof(struct acpi_battery, oem_info), 1}, | |
272 | }; | |
b6ce4083 | 273 | |
038fdea2 AS |
274 | static int extract_package(struct acpi_battery *battery, |
275 | union acpi_object *package, | |
276 | struct acpi_offsets *offsets, int num) | |
277 | { | |
106449e8 | 278 | int i; |
038fdea2 AS |
279 | union acpi_object *element; |
280 | if (package->type != ACPI_TYPE_PACKAGE) | |
281 | return -EFAULT; | |
282 | for (i = 0; i < num; ++i) { | |
283 | if (package->package.count <= i) | |
284 | return -EFAULT; | |
285 | element = &package->package.elements[i]; | |
286 | if (offsets[i].mode) { | |
106449e8 AS |
287 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
288 | if (element->type == ACPI_TYPE_STRING || | |
289 | element->type == ACPI_TYPE_BUFFER) | |
290 | strncpy(ptr, element->string.pointer, 32); | |
291 | else if (element->type == ACPI_TYPE_INTEGER) { | |
292 | strncpy(ptr, (u8 *)&element->integer.value, | |
293 | sizeof(acpi_integer)); | |
294 | ptr[sizeof(acpi_integer)] = 0; | |
b8a1bdb1 AS |
295 | } else |
296 | *ptr = 0; /* don't have value */ | |
038fdea2 | 297 | } else { |
b8a1bdb1 AS |
298 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
299 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
300 | element->integer.value : -1; | |
038fdea2 | 301 | } |
b6ce4083 | 302 | } |
b6ce4083 VL |
303 | return 0; |
304 | } | |
305 | ||
306 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
307 | { | |
aa650bbd | 308 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
309 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
310 | return -ENODEV; | |
311 | } | |
aa650bbd | 312 | return 0; |
b6ce4083 VL |
313 | } |
314 | ||
315 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 316 | { |
aa650bbd | 317 | int result = -EFAULT; |
4be44fcd LB |
318 | acpi_status status = 0; |
319 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 320 | |
b6ce4083 VL |
321 | if (!acpi_battery_present(battery)) |
322 | return 0; | |
038fdea2 | 323 | mutex_lock(&battery->lock); |
f1d4661a | 324 | status = acpi_evaluate_object(battery->device->handle, "_BIF", |
038fdea2 AS |
325 | NULL, &buffer); |
326 | mutex_unlock(&battery->lock); | |
aa650bbd | 327 | |
1da177e4 | 328 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 329 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 330 | return -ENODEV; |
1da177e4 | 331 | } |
aa650bbd | 332 | |
038fdea2 AS |
333 | result = extract_package(battery, buffer.pointer, |
334 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 335 | kfree(buffer.pointer); |
d550d98d | 336 | return result; |
1da177e4 LT |
337 | } |
338 | ||
b6ce4083 | 339 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 340 | { |
4be44fcd LB |
341 | int result = 0; |
342 | acpi_status status = 0; | |
343 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 344 | |
b6ce4083 VL |
345 | if (!acpi_battery_present(battery)) |
346 | return 0; | |
1da177e4 | 347 | |
f1d4661a AS |
348 | if (battery->update_time && |
349 | time_before(jiffies, battery->update_time + | |
350 | msecs_to_jiffies(cache_time))) | |
351 | return 0; | |
352 | ||
038fdea2 | 353 | mutex_lock(&battery->lock); |
f1d4661a | 354 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
355 | NULL, &buffer); |
356 | mutex_unlock(&battery->lock); | |
5b31d895 | 357 | |
1da177e4 | 358 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 359 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 360 | return -ENODEV; |
1da177e4 | 361 | } |
aa650bbd | 362 | |
038fdea2 AS |
363 | result = extract_package(battery, buffer.pointer, |
364 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 365 | battery->update_time = jiffies; |
78490d82 | 366 | kfree(buffer.pointer); |
b6ce4083 VL |
367 | return result; |
368 | } | |
1da177e4 | 369 | |
aa650bbd | 370 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 371 | { |
4be44fcd | 372 | acpi_status status = 0; |
aa650bbd | 373 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 374 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 375 | |
aa650bbd | 376 | if (!acpi_battery_present(battery)|| !battery->alarm_present) |
d550d98d | 377 | return -ENODEV; |
1da177e4 | 378 | |
aa650bbd | 379 | arg0.integer.value = battery->alarm; |
1da177e4 | 380 | |
038fdea2 | 381 | mutex_lock(&battery->lock); |
f1d4661a AS |
382 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
383 | &arg_list, NULL); | |
038fdea2 | 384 | mutex_unlock(&battery->lock); |
aa650bbd | 385 | |
1da177e4 | 386 | if (ACPI_FAILURE(status)) |
d550d98d | 387 | return -ENODEV; |
1da177e4 | 388 | |
aa650bbd | 389 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 390 | return 0; |
1da177e4 LT |
391 | } |
392 | ||
b6ce4083 | 393 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 394 | { |
4be44fcd LB |
395 | acpi_status status = AE_OK; |
396 | acpi_handle handle = NULL; | |
4be44fcd | 397 | |
b6ce4083 | 398 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
399 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
400 | if (ACPI_FAILURE(status)) { | |
038fdea2 | 401 | battery->alarm_present = 0; |
f1d4661a | 402 | return 0; |
b6ce4083 | 403 | } |
f1d4661a AS |
404 | battery->alarm_present = 1; |
405 | if (!battery->alarm) | |
406 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 407 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 408 | } |
1da177e4 | 409 | |
97749cd9 | 410 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
411 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
412 | struct device_attribute *attr, | |
413 | char *buf) | |
414 | { | |
415 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
416 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
417 | } | |
418 | ||
419 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
420 | struct device_attribute *attr, | |
421 | const char *buf, size_t count) | |
422 | { | |
423 | unsigned long x; | |
424 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
425 | if (sscanf(buf, "%ld\n", &x) == 1) | |
426 | battery->alarm = x/1000; | |
427 | if (acpi_battery_present(battery)) | |
428 | acpi_battery_set_alarm(battery); | |
429 | return count; | |
430 | } | |
431 | ||
432 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 433 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
434 | .show = acpi_battery_alarm_show, |
435 | .store = acpi_battery_alarm_store, | |
436 | }; | |
437 | ||
438 | static int sysfs_add_battery(struct acpi_battery *battery) | |
439 | { | |
440 | int result; | |
441 | ||
508df92d AB |
442 | if (battery->power_unit) { |
443 | battery->bat.properties = charge_battery_props; | |
444 | battery->bat.num_properties = | |
445 | ARRAY_SIZE(charge_battery_props); | |
446 | } else { | |
447 | battery->bat.properties = energy_battery_props; | |
448 | battery->bat.num_properties = | |
449 | ARRAY_SIZE(energy_battery_props); | |
450 | } | |
451 | ||
452 | battery->bat.name = acpi_device_bid(battery->device); | |
453 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
454 | battery->bat.get_property = acpi_battery_get_property; | |
455 | ||
456 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
457 | if (result) | |
458 | return result; | |
459 | return device_create_file(battery->bat.dev, &alarm_attr); | |
460 | } | |
461 | ||
462 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
463 | { | |
464 | if (!battery->bat.dev) | |
465 | return; | |
466 | device_remove_file(battery->bat.dev, &alarm_attr); | |
467 | power_supply_unregister(&battery->bat); | |
9104476e | 468 | battery->bat.dev = NULL; |
508df92d | 469 | } |
97749cd9 | 470 | #endif |
508df92d | 471 | |
f1d4661a | 472 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 473 | { |
97749cd9 AS |
474 | int result; |
475 | result = acpi_battery_get_status(battery); | |
508df92d | 476 | if (result) |
b6ce4083 | 477 | return result; |
97749cd9 | 478 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
479 | if (!acpi_battery_present(battery)) { |
480 | sysfs_remove_battery(battery); | |
97749cd9 | 481 | battery->update_time = 0; |
508df92d | 482 | return 0; |
b6ce4083 | 483 | } |
97749cd9 AS |
484 | #endif |
485 | if (!battery->update_time) { | |
486 | result = acpi_battery_get_info(battery); | |
487 | if (result) | |
488 | return result; | |
489 | acpi_battery_init_alarm(battery); | |
490 | } | |
491 | #ifdef CONFIG_ACPI_SYSFS_POWER | |
508df92d AB |
492 | if (!battery->bat.dev) |
493 | sysfs_add_battery(battery); | |
97749cd9 | 494 | #endif |
f1d4661a | 495 | return acpi_battery_get_state(battery); |
4bd35cdb VL |
496 | } |
497 | ||
1da177e4 LT |
498 | /* -------------------------------------------------------------------------- |
499 | FS Interface (/proc) | |
500 | -------------------------------------------------------------------------- */ | |
501 | ||
fdcedbba | 502 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 503 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 504 | |
78490d82 | 505 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 506 | { |
50dd0969 | 507 | struct acpi_battery *battery = seq->private; |
1da177e4 | 508 | |
b6ce4083 | 509 | if (result) |
1da177e4 LT |
510 | goto end; |
511 | ||
aa650bbd AS |
512 | seq_printf(seq, "present: %s\n", |
513 | acpi_battery_present(battery)?"yes":"no"); | |
514 | if (!acpi_battery_present(battery)) | |
1da177e4 | 515 | goto end; |
038fdea2 | 516 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
517 | seq_printf(seq, "design capacity: unknown\n"); |
518 | else | |
519 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
520 | battery->design_capacity, |
521 | acpi_battery_units(battery)); | |
1da177e4 | 522 | |
d7380965 | 523 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
524 | seq_printf(seq, "last full capacity: unknown\n"); |
525 | else | |
526 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 527 | battery->full_charge_capacity, |
aa650bbd AS |
528 | acpi_battery_units(battery)); |
529 | ||
530 | seq_printf(seq, "battery technology: %srechargeable\n", | |
531 | (!battery->technology)?"non-":""); | |
1da177e4 | 532 | |
038fdea2 | 533 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
534 | seq_printf(seq, "design voltage: unknown\n"); |
535 | else | |
536 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 537 | battery->design_voltage); |
1da177e4 | 538 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
539 | battery->design_capacity_warning, |
540 | acpi_battery_units(battery)); | |
1da177e4 | 541 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
542 | battery->design_capacity_low, |
543 | acpi_battery_units(battery)); | |
1da177e4 | 544 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
545 | battery->capacity_granularity_1, |
546 | acpi_battery_units(battery)); | |
1da177e4 | 547 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
548 | battery->capacity_granularity_2, |
549 | acpi_battery_units(battery)); | |
038fdea2 AS |
550 | seq_printf(seq, "model number: %s\n", battery->model_number); |
551 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
552 | seq_printf(seq, "battery type: %s\n", battery->type); | |
553 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 554 | end: |
b6ce4083 VL |
555 | if (result) |
556 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
557 | return result; |
558 | } | |
559 | ||
78490d82 | 560 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 561 | { |
50dd0969 | 562 | struct acpi_battery *battery = seq->private; |
1da177e4 | 563 | |
b6ce4083 | 564 | if (result) |
1da177e4 LT |
565 | goto end; |
566 | ||
aa650bbd AS |
567 | seq_printf(seq, "present: %s\n", |
568 | acpi_battery_present(battery)?"yes":"no"); | |
569 | if (!acpi_battery_present(battery)) | |
1da177e4 | 570 | goto end; |
b6ce4083 | 571 | |
aa650bbd AS |
572 | seq_printf(seq, "capacity state: %s\n", |
573 | (battery->state & 0x04)?"critical":"ok"); | |
574 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
575 | seq_printf(seq, |
576 | "charging state: charging/discharging\n"); | |
aa650bbd | 577 | else if (battery->state & 0x01) |
1da177e4 | 578 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 579 | else if (battery->state & 0x02) |
1da177e4 | 580 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 581 | else |
1da177e4 | 582 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 583 | |
d7380965 | 584 | if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
585 | seq_printf(seq, "present rate: unknown\n"); |
586 | else | |
587 | seq_printf(seq, "present rate: %d %s\n", | |
d7380965 | 588 | battery->current_now, acpi_battery_units(battery)); |
1da177e4 | 589 | |
d7380965 | 590 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
591 | seq_printf(seq, "remaining capacity: unknown\n"); |
592 | else | |
593 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
594 | battery->capacity_now, acpi_battery_units(battery)); |
595 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
596 | seq_printf(seq, "present voltage: unknown\n"); |
597 | else | |
598 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 599 | battery->voltage_now); |
4be44fcd | 600 | end: |
aa650bbd | 601 | if (result) |
b6ce4083 | 602 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
603 | |
604 | return result; | |
605 | } | |
606 | ||
78490d82 | 607 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 608 | { |
50dd0969 | 609 | struct acpi_battery *battery = seq->private; |
1da177e4 | 610 | |
b6ce4083 | 611 | if (result) |
1da177e4 LT |
612 | goto end; |
613 | ||
b6ce4083 | 614 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
615 | seq_printf(seq, "present: no\n"); |
616 | goto end; | |
617 | } | |
1da177e4 LT |
618 | seq_printf(seq, "alarm: "); |
619 | if (!battery->alarm) | |
620 | seq_printf(seq, "unsupported\n"); | |
621 | else | |
aa650bbd AS |
622 | seq_printf(seq, "%u %sh\n", battery->alarm, |
623 | acpi_battery_units(battery)); | |
4be44fcd | 624 | end: |
b6ce4083 VL |
625 | if (result) |
626 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
627 | return result; |
628 | } | |
629 | ||
f1d4661a AS |
630 | static ssize_t acpi_battery_write_alarm(struct file *file, |
631 | const char __user * buffer, | |
632 | size_t count, loff_t * ppos) | |
1da177e4 | 633 | { |
4be44fcd LB |
634 | int result = 0; |
635 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
636 | struct seq_file *m = file->private_data; |
637 | struct acpi_battery *battery = m->private; | |
1da177e4 | 638 | |
1da177e4 | 639 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 640 | return -EINVAL; |
b6ce4083 VL |
641 | if (!acpi_battery_present(battery)) { |
642 | result = -ENODEV; | |
643 | goto end; | |
644 | } | |
b6ce4083 VL |
645 | if (copy_from_user(alarm_string, buffer, count)) { |
646 | result = -EFAULT; | |
647 | goto end; | |
648 | } | |
1da177e4 | 649 | alarm_string[count] = '\0'; |
f1d4661a | 650 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 651 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 652 | end: |
b6ce4083 | 653 | if (!result) |
f1d4661a | 654 | return count; |
78490d82 AS |
655 | return result; |
656 | } | |
657 | ||
658 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
659 | |
660 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
661 | acpi_battery_print_info, | |
662 | acpi_battery_print_state, | |
663 | acpi_battery_print_alarm, | |
78490d82 | 664 | }; |
b6ce4083 | 665 | |
78490d82 AS |
666 | static int acpi_battery_read(int fid, struct seq_file *seq) |
667 | { | |
668 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 669 | int result = acpi_battery_update(battery); |
aa650bbd | 670 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
671 | } |
672 | ||
aa650bbd AS |
673 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
674 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
675 | { \ | |
676 | return acpi_battery_read(_name##_tag, seq); \ | |
677 | } \ | |
678 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
679 | { \ | |
680 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
681 | } |
682 | ||
aa650bbd AS |
683 | DECLARE_FILE_FUNCTIONS(info); |
684 | DECLARE_FILE_FUNCTIONS(state); | |
685 | DECLARE_FILE_FUNCTIONS(alarm); | |
686 | ||
687 | #undef DECLARE_FILE_FUNCTIONS | |
688 | ||
689 | #define FILE_DESCRIPTION_RO(_name) \ | |
690 | { \ | |
691 | .name = __stringify(_name), \ | |
692 | .mode = S_IRUGO, \ | |
693 | .ops = { \ | |
694 | .open = acpi_battery_##_name##_open_fs, \ | |
695 | .read = seq_read, \ | |
696 | .llseek = seq_lseek, \ | |
697 | .release = single_release, \ | |
698 | .owner = THIS_MODULE, \ | |
699 | }, \ | |
700 | } | |
78490d82 | 701 | |
aa650bbd AS |
702 | #define FILE_DESCRIPTION_RW(_name) \ |
703 | { \ | |
704 | .name = __stringify(_name), \ | |
705 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
706 | .ops = { \ | |
707 | .open = acpi_battery_##_name##_open_fs, \ | |
708 | .read = seq_read, \ | |
709 | .llseek = seq_lseek, \ | |
710 | .write = acpi_battery_write_##_name, \ | |
711 | .release = single_release, \ | |
712 | .owner = THIS_MODULE, \ | |
713 | }, \ | |
714 | } | |
1da177e4 | 715 | |
78490d82 AS |
716 | static struct battery_file { |
717 | struct file_operations ops; | |
718 | mode_t mode; | |
719 | char *name; | |
720 | } acpi_battery_file[] = { | |
aa650bbd AS |
721 | FILE_DESCRIPTION_RO(info), |
722 | FILE_DESCRIPTION_RO(state), | |
723 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
724 | }; |
725 | ||
aa650bbd AS |
726 | #undef FILE_DESCRIPTION_RO |
727 | #undef FILE_DESCRIPTION_RW | |
728 | ||
4be44fcd | 729 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 730 | { |
4be44fcd | 731 | struct proc_dir_entry *entry = NULL; |
78490d82 | 732 | int i; |
1da177e4 | 733 | |
1da177e4 LT |
734 | if (!acpi_device_dir(device)) { |
735 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 736 | acpi_battery_dir); |
1da177e4 | 737 | if (!acpi_device_dir(device)) |
d550d98d | 738 | return -ENODEV; |
1da177e4 LT |
739 | acpi_device_dir(device)->owner = THIS_MODULE; |
740 | } | |
741 | ||
78490d82 | 742 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
cf7acfab DL |
743 | entry = proc_create_data(acpi_battery_file[i].name, |
744 | acpi_battery_file[i].mode, | |
745 | acpi_device_dir(device), | |
746 | &acpi_battery_file[i].ops, | |
747 | acpi_driver_data(device)); | |
78490d82 AS |
748 | if (!entry) |
749 | return -ENODEV; | |
1da177e4 | 750 | } |
d550d98d | 751 | return 0; |
1da177e4 LT |
752 | } |
753 | ||
aa650bbd | 754 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 755 | { |
78490d82 | 756 | int i; |
aa650bbd AS |
757 | if (!acpi_device_dir(device)) |
758 | return; | |
759 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
760 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 761 | acpi_device_dir(device)); |
1da177e4 | 762 | |
aa650bbd AS |
763 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
764 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
765 | } |
766 | ||
d7380965 | 767 | #endif |
3e58ea0d | 768 | |
1da177e4 LT |
769 | /* -------------------------------------------------------------------------- |
770 | Driver Interface | |
771 | -------------------------------------------------------------------------- */ | |
772 | ||
4be44fcd | 773 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 774 | { |
50dd0969 | 775 | struct acpi_battery *battery = data; |
f1d4661a | 776 | struct acpi_device *device; |
1da177e4 | 777 | if (!battery) |
d550d98d | 778 | return; |
145def84 | 779 | device = battery->device; |
f1d4661a AS |
780 | acpi_battery_update(battery); |
781 | acpi_bus_generate_proc_event(device, event, | |
782 | acpi_battery_present(battery)); | |
783 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
0794469d | 784 | dev_name(&device->dev), event, |
9ea7d575 | 785 | acpi_battery_present(battery)); |
97749cd9 | 786 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
787 | /* acpi_batter_update could remove power_supply object */ |
788 | if (battery->bat.dev) | |
789 | kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); | |
97749cd9 | 790 | #endif |
1da177e4 LT |
791 | } |
792 | ||
4be44fcd | 793 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 794 | { |
4be44fcd LB |
795 | int result = 0; |
796 | acpi_status status = 0; | |
797 | struct acpi_battery *battery = NULL; | |
1da177e4 | 798 | if (!device) |
d550d98d | 799 | return -EINVAL; |
36bcbec7 | 800 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 801 | if (!battery) |
d550d98d | 802 | return -ENOMEM; |
145def84 | 803 | battery->device = device; |
1da177e4 LT |
804 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
805 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 806 | device->driver_data = battery; |
038fdea2 | 807 | mutex_init(&battery->lock); |
f1d4661a | 808 | acpi_battery_update(battery); |
fdcedbba | 809 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
810 | result = acpi_battery_add_fs(device); |
811 | if (result) | |
812 | goto end; | |
d7380965 | 813 | #endif |
3b073ec3 | 814 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 815 | ACPI_ALL_NOTIFY, |
4be44fcd | 816 | acpi_battery_notify, battery); |
1da177e4 | 817 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 818 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
819 | result = -ENODEV; |
820 | goto end; | |
821 | } | |
1da177e4 | 822 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
4be44fcd LB |
823 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
824 | device->status.battery_present ? "present" : "absent"); | |
4be44fcd | 825 | end: |
1da177e4 | 826 | if (result) { |
fdcedbba | 827 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 828 | acpi_battery_remove_fs(device); |
d7380965 | 829 | #endif |
1da177e4 LT |
830 | kfree(battery); |
831 | } | |
d550d98d | 832 | return result; |
1da177e4 LT |
833 | } |
834 | ||
4be44fcd | 835 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 836 | { |
4be44fcd LB |
837 | acpi_status status = 0; |
838 | struct acpi_battery *battery = NULL; | |
1da177e4 | 839 | |
1da177e4 | 840 | if (!device || !acpi_driver_data(device)) |
d550d98d | 841 | return -EINVAL; |
50dd0969 | 842 | battery = acpi_driver_data(device); |
3b073ec3 | 843 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 844 | ACPI_ALL_NOTIFY, |
4be44fcd | 845 | acpi_battery_notify); |
fdcedbba | 846 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 847 | acpi_battery_remove_fs(device); |
d7380965 | 848 | #endif |
97749cd9 | 849 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d | 850 | sysfs_remove_battery(battery); |
97749cd9 | 851 | #endif |
038fdea2 | 852 | mutex_destroy(&battery->lock); |
1da177e4 | 853 | kfree(battery); |
d550d98d | 854 | return 0; |
1da177e4 LT |
855 | } |
856 | ||
34c4415a | 857 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 858 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
859 | { |
860 | struct acpi_battery *battery; | |
34c4415a JK |
861 | if (!device) |
862 | return -EINVAL; | |
f1d4661a AS |
863 | battery = acpi_driver_data(device); |
864 | battery->update_time = 0; | |
508df92d | 865 | acpi_battery_update(battery); |
b6ce4083 | 866 | return 0; |
34c4415a JK |
867 | } |
868 | ||
aa650bbd AS |
869 | static struct acpi_driver acpi_battery_driver = { |
870 | .name = "battery", | |
871 | .class = ACPI_BATTERY_CLASS, | |
872 | .ids = battery_device_ids, | |
873 | .ops = { | |
874 | .add = acpi_battery_add, | |
875 | .resume = acpi_battery_resume, | |
876 | .remove = acpi_battery_remove, | |
877 | }, | |
878 | }; | |
879 | ||
4be44fcd | 880 | static int __init acpi_battery_init(void) |
1da177e4 | 881 | { |
4d8316d5 PM |
882 | if (acpi_disabled) |
883 | return -ENODEV; | |
fdcedbba | 884 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 885 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 886 | if (!acpi_battery_dir) |
d550d98d | 887 | return -ENODEV; |
d7380965 | 888 | #endif |
aa650bbd | 889 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 890 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 891 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 892 | #endif |
d550d98d | 893 | return -ENODEV; |
1da177e4 | 894 | } |
d550d98d | 895 | return 0; |
1da177e4 LT |
896 | } |
897 | ||
4be44fcd | 898 | static void __exit acpi_battery_exit(void) |
1da177e4 | 899 | { |
1da177e4 | 900 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 901 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 902 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 903 | #endif |
1da177e4 LT |
904 | } |
905 | ||
1da177e4 LT |
906 | module_init(acpi_battery_init); |
907 | module_exit(acpi_battery_exit); |