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: | |
176 | val->intval = battery->current_now * 1000; | |
558073dd AS |
177 | /* if power units are mW, convert to mA by |
178 | dividing by current voltage (mV/1000) */ | |
179 | if (!battery->power_unit) { | |
180 | if (battery->voltage_now) { | |
181 | val->intval /= battery->voltage_now; | |
182 | val->intval *= 1000; | |
183 | } else | |
184 | val->intval = -1; | |
185 | } | |
d7380965 AS |
186 | break; |
187 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
188 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
189 | val->intval = battery->design_capacity * 1000; | |
190 | break; | |
191 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
192 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
193 | val->intval = battery->full_charge_capacity * 1000; | |
194 | break; | |
195 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
196 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
197 | val->intval = battery->capacity_now * 1000; | |
198 | break; | |
199 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
200 | val->strval = battery->model_number; | |
201 | break; | |
202 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
203 | val->strval = battery->oem_info; | |
204 | break; | |
7c2670bb | 205 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
206 | val->strval = battery->serial_number; | |
207 | break; | |
d7380965 AS |
208 | default: |
209 | return -EINVAL; | |
210 | } | |
211 | return 0; | |
212 | } | |
213 | ||
214 | static enum power_supply_property charge_battery_props[] = { | |
215 | POWER_SUPPLY_PROP_STATUS, | |
216 | POWER_SUPPLY_PROP_PRESENT, | |
217 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
218 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
219 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
220 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
221 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
222 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
223 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
224 | POWER_SUPPLY_PROP_MODEL_NAME, | |
225 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 226 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
227 | }; |
228 | ||
229 | static enum power_supply_property energy_battery_props[] = { | |
230 | POWER_SUPPLY_PROP_STATUS, | |
231 | POWER_SUPPLY_PROP_PRESENT, | |
232 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
233 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
234 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
235 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
236 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
237 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
238 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
239 | POWER_SUPPLY_PROP_MODEL_NAME, | |
240 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 241 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 | 242 | }; |
97749cd9 | 243 | #endif |
d7380965 | 244 | |
fdcedbba | 245 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 246 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 247 | { |
f1d4661a | 248 | return (battery->power_unit)?"mA":"mW"; |
b6ce4083 | 249 | } |
d7380965 | 250 | #endif |
b6ce4083 | 251 | |
78490d82 AS |
252 | /* -------------------------------------------------------------------------- |
253 | Battery Management | |
254 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
255 | struct acpi_offsets { |
256 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
257 | u8 mode; /* int or string? */ | |
258 | }; | |
b6ce4083 | 259 | |
038fdea2 AS |
260 | static struct acpi_offsets state_offsets[] = { |
261 | {offsetof(struct acpi_battery, state), 0}, | |
d7380965 AS |
262 | {offsetof(struct acpi_battery, current_now), 0}, |
263 | {offsetof(struct acpi_battery, capacity_now), 0}, | |
264 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 265 | }; |
b6ce4083 | 266 | |
038fdea2 AS |
267 | static struct acpi_offsets info_offsets[] = { |
268 | {offsetof(struct acpi_battery, power_unit), 0}, | |
269 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 270 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
271 | {offsetof(struct acpi_battery, technology), 0}, |
272 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
273 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
274 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
275 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
276 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
277 | {offsetof(struct acpi_battery, model_number), 1}, | |
278 | {offsetof(struct acpi_battery, serial_number), 1}, | |
279 | {offsetof(struct acpi_battery, type), 1}, | |
280 | {offsetof(struct acpi_battery, oem_info), 1}, | |
281 | }; | |
b6ce4083 | 282 | |
038fdea2 AS |
283 | static int extract_package(struct acpi_battery *battery, |
284 | union acpi_object *package, | |
285 | struct acpi_offsets *offsets, int num) | |
286 | { | |
106449e8 | 287 | int i; |
038fdea2 AS |
288 | union acpi_object *element; |
289 | if (package->type != ACPI_TYPE_PACKAGE) | |
290 | return -EFAULT; | |
291 | for (i = 0; i < num; ++i) { | |
292 | if (package->package.count <= i) | |
293 | return -EFAULT; | |
294 | element = &package->package.elements[i]; | |
295 | if (offsets[i].mode) { | |
106449e8 AS |
296 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
297 | if (element->type == ACPI_TYPE_STRING || | |
298 | element->type == ACPI_TYPE_BUFFER) | |
299 | strncpy(ptr, element->string.pointer, 32); | |
300 | else if (element->type == ACPI_TYPE_INTEGER) { | |
301 | strncpy(ptr, (u8 *)&element->integer.value, | |
302 | sizeof(acpi_integer)); | |
303 | ptr[sizeof(acpi_integer)] = 0; | |
b8a1bdb1 AS |
304 | } else |
305 | *ptr = 0; /* don't have value */ | |
038fdea2 | 306 | } else { |
b8a1bdb1 AS |
307 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
308 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
309 | element->integer.value : -1; | |
038fdea2 | 310 | } |
b6ce4083 | 311 | } |
b6ce4083 VL |
312 | return 0; |
313 | } | |
314 | ||
315 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
316 | { | |
aa650bbd | 317 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
318 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
319 | return -ENODEV; | |
320 | } | |
aa650bbd | 321 | return 0; |
b6ce4083 VL |
322 | } |
323 | ||
324 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 325 | { |
aa650bbd | 326 | int result = -EFAULT; |
4be44fcd LB |
327 | acpi_status status = 0; |
328 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 329 | |
b6ce4083 VL |
330 | if (!acpi_battery_present(battery)) |
331 | return 0; | |
038fdea2 | 332 | mutex_lock(&battery->lock); |
f1d4661a | 333 | status = acpi_evaluate_object(battery->device->handle, "_BIF", |
038fdea2 AS |
334 | NULL, &buffer); |
335 | mutex_unlock(&battery->lock); | |
aa650bbd | 336 | |
1da177e4 | 337 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 338 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 339 | return -ENODEV; |
1da177e4 | 340 | } |
aa650bbd | 341 | |
038fdea2 AS |
342 | result = extract_package(battery, buffer.pointer, |
343 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 344 | kfree(buffer.pointer); |
d550d98d | 345 | return result; |
1da177e4 LT |
346 | } |
347 | ||
b6ce4083 | 348 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 349 | { |
4be44fcd LB |
350 | int result = 0; |
351 | acpi_status status = 0; | |
352 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 353 | |
b6ce4083 VL |
354 | if (!acpi_battery_present(battery)) |
355 | return 0; | |
1da177e4 | 356 | |
f1d4661a AS |
357 | if (battery->update_time && |
358 | time_before(jiffies, battery->update_time + | |
359 | msecs_to_jiffies(cache_time))) | |
360 | return 0; | |
361 | ||
038fdea2 | 362 | mutex_lock(&battery->lock); |
f1d4661a | 363 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
364 | NULL, &buffer); |
365 | mutex_unlock(&battery->lock); | |
5b31d895 | 366 | |
1da177e4 | 367 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 368 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 369 | return -ENODEV; |
1da177e4 | 370 | } |
aa650bbd | 371 | |
038fdea2 AS |
372 | result = extract_package(battery, buffer.pointer, |
373 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 374 | battery->update_time = jiffies; |
78490d82 | 375 | kfree(buffer.pointer); |
b6ce4083 VL |
376 | return result; |
377 | } | |
1da177e4 | 378 | |
aa650bbd | 379 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 380 | { |
4be44fcd | 381 | acpi_status status = 0; |
aa650bbd | 382 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 383 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 384 | |
aa650bbd | 385 | if (!acpi_battery_present(battery)|| !battery->alarm_present) |
d550d98d | 386 | return -ENODEV; |
1da177e4 | 387 | |
aa650bbd | 388 | arg0.integer.value = battery->alarm; |
1da177e4 | 389 | |
038fdea2 | 390 | mutex_lock(&battery->lock); |
f1d4661a AS |
391 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
392 | &arg_list, NULL); | |
038fdea2 | 393 | mutex_unlock(&battery->lock); |
aa650bbd | 394 | |
1da177e4 | 395 | if (ACPI_FAILURE(status)) |
d550d98d | 396 | return -ENODEV; |
1da177e4 | 397 | |
aa650bbd | 398 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 399 | return 0; |
1da177e4 LT |
400 | } |
401 | ||
b6ce4083 | 402 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 403 | { |
4be44fcd LB |
404 | acpi_status status = AE_OK; |
405 | acpi_handle handle = NULL; | |
4be44fcd | 406 | |
b6ce4083 | 407 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
408 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
409 | if (ACPI_FAILURE(status)) { | |
038fdea2 | 410 | battery->alarm_present = 0; |
f1d4661a | 411 | return 0; |
b6ce4083 | 412 | } |
f1d4661a AS |
413 | battery->alarm_present = 1; |
414 | if (!battery->alarm) | |
415 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 416 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 417 | } |
1da177e4 | 418 | |
97749cd9 | 419 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
420 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
421 | struct device_attribute *attr, | |
422 | char *buf) | |
423 | { | |
424 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
425 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
426 | } | |
427 | ||
428 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
429 | struct device_attribute *attr, | |
430 | const char *buf, size_t count) | |
431 | { | |
432 | unsigned long x; | |
433 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
434 | if (sscanf(buf, "%ld\n", &x) == 1) | |
435 | battery->alarm = x/1000; | |
436 | if (acpi_battery_present(battery)) | |
437 | acpi_battery_set_alarm(battery); | |
438 | return count; | |
439 | } | |
440 | ||
441 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 442 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
443 | .show = acpi_battery_alarm_show, |
444 | .store = acpi_battery_alarm_store, | |
445 | }; | |
446 | ||
447 | static int sysfs_add_battery(struct acpi_battery *battery) | |
448 | { | |
449 | int result; | |
450 | ||
508df92d AB |
451 | if (battery->power_unit) { |
452 | battery->bat.properties = charge_battery_props; | |
453 | battery->bat.num_properties = | |
454 | ARRAY_SIZE(charge_battery_props); | |
455 | } else { | |
456 | battery->bat.properties = energy_battery_props; | |
457 | battery->bat.num_properties = | |
458 | ARRAY_SIZE(energy_battery_props); | |
459 | } | |
460 | ||
461 | battery->bat.name = acpi_device_bid(battery->device); | |
462 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
463 | battery->bat.get_property = acpi_battery_get_property; | |
464 | ||
465 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
466 | if (result) | |
467 | return result; | |
468 | return device_create_file(battery->bat.dev, &alarm_attr); | |
469 | } | |
470 | ||
471 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
472 | { | |
473 | if (!battery->bat.dev) | |
474 | return; | |
475 | device_remove_file(battery->bat.dev, &alarm_attr); | |
476 | power_supply_unregister(&battery->bat); | |
9104476e | 477 | battery->bat.dev = NULL; |
508df92d | 478 | } |
97749cd9 | 479 | #endif |
508df92d | 480 | |
f1d4661a | 481 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 482 | { |
97749cd9 AS |
483 | int result; |
484 | result = acpi_battery_get_status(battery); | |
508df92d | 485 | if (result) |
b6ce4083 | 486 | return result; |
97749cd9 | 487 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
488 | if (!acpi_battery_present(battery)) { |
489 | sysfs_remove_battery(battery); | |
97749cd9 | 490 | battery->update_time = 0; |
508df92d | 491 | return 0; |
b6ce4083 | 492 | } |
97749cd9 AS |
493 | #endif |
494 | if (!battery->update_time) { | |
495 | result = acpi_battery_get_info(battery); | |
496 | if (result) | |
497 | return result; | |
498 | acpi_battery_init_alarm(battery); | |
499 | } | |
500 | #ifdef CONFIG_ACPI_SYSFS_POWER | |
508df92d AB |
501 | if (!battery->bat.dev) |
502 | sysfs_add_battery(battery); | |
97749cd9 | 503 | #endif |
f1d4661a | 504 | return acpi_battery_get_state(battery); |
4bd35cdb VL |
505 | } |
506 | ||
1da177e4 LT |
507 | /* -------------------------------------------------------------------------- |
508 | FS Interface (/proc) | |
509 | -------------------------------------------------------------------------- */ | |
510 | ||
fdcedbba | 511 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 512 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 513 | |
78490d82 | 514 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 515 | { |
50dd0969 | 516 | struct acpi_battery *battery = seq->private; |
1da177e4 | 517 | |
b6ce4083 | 518 | if (result) |
1da177e4 LT |
519 | goto end; |
520 | ||
aa650bbd AS |
521 | seq_printf(seq, "present: %s\n", |
522 | acpi_battery_present(battery)?"yes":"no"); | |
523 | if (!acpi_battery_present(battery)) | |
1da177e4 | 524 | goto end; |
038fdea2 | 525 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
526 | seq_printf(seq, "design capacity: unknown\n"); |
527 | else | |
528 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
529 | battery->design_capacity, |
530 | acpi_battery_units(battery)); | |
1da177e4 | 531 | |
d7380965 | 532 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
533 | seq_printf(seq, "last full capacity: unknown\n"); |
534 | else | |
535 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 536 | battery->full_charge_capacity, |
aa650bbd AS |
537 | acpi_battery_units(battery)); |
538 | ||
539 | seq_printf(seq, "battery technology: %srechargeable\n", | |
540 | (!battery->technology)?"non-":""); | |
1da177e4 | 541 | |
038fdea2 | 542 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
543 | seq_printf(seq, "design voltage: unknown\n"); |
544 | else | |
545 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 546 | battery->design_voltage); |
1da177e4 | 547 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
548 | battery->design_capacity_warning, |
549 | acpi_battery_units(battery)); | |
1da177e4 | 550 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
551 | battery->design_capacity_low, |
552 | acpi_battery_units(battery)); | |
1da177e4 | 553 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
554 | battery->capacity_granularity_1, |
555 | acpi_battery_units(battery)); | |
1da177e4 | 556 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
557 | battery->capacity_granularity_2, |
558 | acpi_battery_units(battery)); | |
038fdea2 AS |
559 | seq_printf(seq, "model number: %s\n", battery->model_number); |
560 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
561 | seq_printf(seq, "battery type: %s\n", battery->type); | |
562 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 563 | end: |
b6ce4083 VL |
564 | if (result) |
565 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
566 | return result; |
567 | } | |
568 | ||
78490d82 | 569 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 570 | { |
50dd0969 | 571 | struct acpi_battery *battery = seq->private; |
1da177e4 | 572 | |
b6ce4083 | 573 | if (result) |
1da177e4 LT |
574 | goto end; |
575 | ||
aa650bbd AS |
576 | seq_printf(seq, "present: %s\n", |
577 | acpi_battery_present(battery)?"yes":"no"); | |
578 | if (!acpi_battery_present(battery)) | |
1da177e4 | 579 | goto end; |
b6ce4083 | 580 | |
aa650bbd AS |
581 | seq_printf(seq, "capacity state: %s\n", |
582 | (battery->state & 0x04)?"critical":"ok"); | |
583 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
584 | seq_printf(seq, |
585 | "charging state: charging/discharging\n"); | |
aa650bbd | 586 | else if (battery->state & 0x01) |
1da177e4 | 587 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 588 | else if (battery->state & 0x02) |
1da177e4 | 589 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 590 | else |
1da177e4 | 591 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 592 | |
d7380965 | 593 | if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
594 | seq_printf(seq, "present rate: unknown\n"); |
595 | else | |
596 | seq_printf(seq, "present rate: %d %s\n", | |
d7380965 | 597 | battery->current_now, acpi_battery_units(battery)); |
1da177e4 | 598 | |
d7380965 | 599 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
600 | seq_printf(seq, "remaining capacity: unknown\n"); |
601 | else | |
602 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
603 | battery->capacity_now, acpi_battery_units(battery)); |
604 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
605 | seq_printf(seq, "present voltage: unknown\n"); |
606 | else | |
607 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 608 | battery->voltage_now); |
4be44fcd | 609 | end: |
aa650bbd | 610 | if (result) |
b6ce4083 | 611 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
612 | |
613 | return result; | |
614 | } | |
615 | ||
78490d82 | 616 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 617 | { |
50dd0969 | 618 | struct acpi_battery *battery = seq->private; |
1da177e4 | 619 | |
b6ce4083 | 620 | if (result) |
1da177e4 LT |
621 | goto end; |
622 | ||
b6ce4083 | 623 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
624 | seq_printf(seq, "present: no\n"); |
625 | goto end; | |
626 | } | |
1da177e4 LT |
627 | seq_printf(seq, "alarm: "); |
628 | if (!battery->alarm) | |
629 | seq_printf(seq, "unsupported\n"); | |
630 | else | |
aa650bbd AS |
631 | seq_printf(seq, "%u %sh\n", battery->alarm, |
632 | acpi_battery_units(battery)); | |
4be44fcd | 633 | end: |
b6ce4083 VL |
634 | if (result) |
635 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
636 | return result; |
637 | } | |
638 | ||
f1d4661a AS |
639 | static ssize_t acpi_battery_write_alarm(struct file *file, |
640 | const char __user * buffer, | |
641 | size_t count, loff_t * ppos) | |
1da177e4 | 642 | { |
4be44fcd LB |
643 | int result = 0; |
644 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
645 | struct seq_file *m = file->private_data; |
646 | struct acpi_battery *battery = m->private; | |
1da177e4 | 647 | |
1da177e4 | 648 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 649 | return -EINVAL; |
b6ce4083 VL |
650 | if (!acpi_battery_present(battery)) { |
651 | result = -ENODEV; | |
652 | goto end; | |
653 | } | |
b6ce4083 VL |
654 | if (copy_from_user(alarm_string, buffer, count)) { |
655 | result = -EFAULT; | |
656 | goto end; | |
657 | } | |
1da177e4 | 658 | alarm_string[count] = '\0'; |
f1d4661a | 659 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 660 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 661 | end: |
b6ce4083 | 662 | if (!result) |
f1d4661a | 663 | return count; |
78490d82 AS |
664 | return result; |
665 | } | |
666 | ||
667 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
668 | |
669 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
670 | acpi_battery_print_info, | |
671 | acpi_battery_print_state, | |
672 | acpi_battery_print_alarm, | |
78490d82 | 673 | }; |
b6ce4083 | 674 | |
78490d82 AS |
675 | static int acpi_battery_read(int fid, struct seq_file *seq) |
676 | { | |
677 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 678 | int result = acpi_battery_update(battery); |
aa650bbd | 679 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
680 | } |
681 | ||
aa650bbd AS |
682 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
683 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
684 | { \ | |
685 | return acpi_battery_read(_name##_tag, seq); \ | |
686 | } \ | |
687 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
688 | { \ | |
689 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
690 | } |
691 | ||
aa650bbd AS |
692 | DECLARE_FILE_FUNCTIONS(info); |
693 | DECLARE_FILE_FUNCTIONS(state); | |
694 | DECLARE_FILE_FUNCTIONS(alarm); | |
695 | ||
696 | #undef DECLARE_FILE_FUNCTIONS | |
697 | ||
698 | #define FILE_DESCRIPTION_RO(_name) \ | |
699 | { \ | |
700 | .name = __stringify(_name), \ | |
701 | .mode = S_IRUGO, \ | |
702 | .ops = { \ | |
703 | .open = acpi_battery_##_name##_open_fs, \ | |
704 | .read = seq_read, \ | |
705 | .llseek = seq_lseek, \ | |
706 | .release = single_release, \ | |
707 | .owner = THIS_MODULE, \ | |
708 | }, \ | |
709 | } | |
78490d82 | 710 | |
aa650bbd AS |
711 | #define FILE_DESCRIPTION_RW(_name) \ |
712 | { \ | |
713 | .name = __stringify(_name), \ | |
714 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
715 | .ops = { \ | |
716 | .open = acpi_battery_##_name##_open_fs, \ | |
717 | .read = seq_read, \ | |
718 | .llseek = seq_lseek, \ | |
719 | .write = acpi_battery_write_##_name, \ | |
720 | .release = single_release, \ | |
721 | .owner = THIS_MODULE, \ | |
722 | }, \ | |
723 | } | |
1da177e4 | 724 | |
78490d82 AS |
725 | static struct battery_file { |
726 | struct file_operations ops; | |
727 | mode_t mode; | |
728 | char *name; | |
729 | } acpi_battery_file[] = { | |
aa650bbd AS |
730 | FILE_DESCRIPTION_RO(info), |
731 | FILE_DESCRIPTION_RO(state), | |
732 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
733 | }; |
734 | ||
aa650bbd AS |
735 | #undef FILE_DESCRIPTION_RO |
736 | #undef FILE_DESCRIPTION_RW | |
737 | ||
4be44fcd | 738 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 739 | { |
4be44fcd | 740 | struct proc_dir_entry *entry = NULL; |
78490d82 | 741 | int i; |
1da177e4 | 742 | |
1da177e4 LT |
743 | if (!acpi_device_dir(device)) { |
744 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 745 | acpi_battery_dir); |
1da177e4 | 746 | if (!acpi_device_dir(device)) |
d550d98d | 747 | return -ENODEV; |
1da177e4 LT |
748 | acpi_device_dir(device)->owner = THIS_MODULE; |
749 | } | |
750 | ||
78490d82 | 751 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
cf7acfab DL |
752 | entry = proc_create_data(acpi_battery_file[i].name, |
753 | acpi_battery_file[i].mode, | |
754 | acpi_device_dir(device), | |
755 | &acpi_battery_file[i].ops, | |
756 | acpi_driver_data(device)); | |
78490d82 AS |
757 | if (!entry) |
758 | return -ENODEV; | |
1da177e4 | 759 | } |
d550d98d | 760 | return 0; |
1da177e4 LT |
761 | } |
762 | ||
aa650bbd | 763 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 764 | { |
78490d82 | 765 | int i; |
aa650bbd AS |
766 | if (!acpi_device_dir(device)) |
767 | return; | |
768 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
769 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 770 | acpi_device_dir(device)); |
1da177e4 | 771 | |
aa650bbd AS |
772 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
773 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
774 | } |
775 | ||
d7380965 | 776 | #endif |
3e58ea0d | 777 | |
1da177e4 LT |
778 | /* -------------------------------------------------------------------------- |
779 | Driver Interface | |
780 | -------------------------------------------------------------------------- */ | |
781 | ||
4be44fcd | 782 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 783 | { |
50dd0969 | 784 | struct acpi_battery *battery = data; |
f1d4661a | 785 | struct acpi_device *device; |
1da177e4 | 786 | if (!battery) |
d550d98d | 787 | return; |
145def84 | 788 | device = battery->device; |
f1d4661a AS |
789 | acpi_battery_update(battery); |
790 | acpi_bus_generate_proc_event(device, event, | |
791 | acpi_battery_present(battery)); | |
792 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
0794469d | 793 | dev_name(&device->dev), event, |
9ea7d575 | 794 | acpi_battery_present(battery)); |
97749cd9 | 795 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
796 | /* acpi_batter_update could remove power_supply object */ |
797 | if (battery->bat.dev) | |
798 | kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); | |
97749cd9 | 799 | #endif |
1da177e4 LT |
800 | } |
801 | ||
4be44fcd | 802 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 803 | { |
4be44fcd LB |
804 | int result = 0; |
805 | acpi_status status = 0; | |
806 | struct acpi_battery *battery = NULL; | |
1da177e4 | 807 | if (!device) |
d550d98d | 808 | return -EINVAL; |
36bcbec7 | 809 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 810 | if (!battery) |
d550d98d | 811 | return -ENOMEM; |
145def84 | 812 | battery->device = device; |
1da177e4 LT |
813 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
814 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 815 | device->driver_data = battery; |
038fdea2 | 816 | mutex_init(&battery->lock); |
f1d4661a | 817 | acpi_battery_update(battery); |
fdcedbba | 818 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
819 | result = acpi_battery_add_fs(device); |
820 | if (result) | |
821 | goto end; | |
d7380965 | 822 | #endif |
3b073ec3 | 823 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 824 | ACPI_ALL_NOTIFY, |
4be44fcd | 825 | acpi_battery_notify, battery); |
1da177e4 | 826 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 827 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
828 | result = -ENODEV; |
829 | goto end; | |
830 | } | |
1da177e4 | 831 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
4be44fcd LB |
832 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
833 | device->status.battery_present ? "present" : "absent"); | |
4be44fcd | 834 | end: |
1da177e4 | 835 | if (result) { |
fdcedbba | 836 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 837 | acpi_battery_remove_fs(device); |
d7380965 | 838 | #endif |
1da177e4 LT |
839 | kfree(battery); |
840 | } | |
d550d98d | 841 | return result; |
1da177e4 LT |
842 | } |
843 | ||
4be44fcd | 844 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 845 | { |
4be44fcd LB |
846 | acpi_status status = 0; |
847 | struct acpi_battery *battery = NULL; | |
1da177e4 | 848 | |
1da177e4 | 849 | if (!device || !acpi_driver_data(device)) |
d550d98d | 850 | return -EINVAL; |
50dd0969 | 851 | battery = acpi_driver_data(device); |
3b073ec3 | 852 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 853 | ACPI_ALL_NOTIFY, |
4be44fcd | 854 | acpi_battery_notify); |
fdcedbba | 855 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 856 | acpi_battery_remove_fs(device); |
d7380965 | 857 | #endif |
97749cd9 | 858 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d | 859 | sysfs_remove_battery(battery); |
97749cd9 | 860 | #endif |
038fdea2 | 861 | mutex_destroy(&battery->lock); |
1da177e4 | 862 | kfree(battery); |
d550d98d | 863 | return 0; |
1da177e4 LT |
864 | } |
865 | ||
34c4415a | 866 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 867 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
868 | { |
869 | struct acpi_battery *battery; | |
34c4415a JK |
870 | if (!device) |
871 | return -EINVAL; | |
f1d4661a AS |
872 | battery = acpi_driver_data(device); |
873 | battery->update_time = 0; | |
508df92d | 874 | acpi_battery_update(battery); |
b6ce4083 | 875 | return 0; |
34c4415a JK |
876 | } |
877 | ||
aa650bbd AS |
878 | static struct acpi_driver acpi_battery_driver = { |
879 | .name = "battery", | |
880 | .class = ACPI_BATTERY_CLASS, | |
881 | .ids = battery_device_ids, | |
882 | .ops = { | |
883 | .add = acpi_battery_add, | |
884 | .resume = acpi_battery_resume, | |
885 | .remove = acpi_battery_remove, | |
886 | }, | |
887 | }; | |
888 | ||
4be44fcd | 889 | static int __init acpi_battery_init(void) |
1da177e4 | 890 | { |
4d8316d5 PM |
891 | if (acpi_disabled) |
892 | return -ENODEV; | |
fdcedbba | 893 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 894 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 895 | if (!acpi_battery_dir) |
d550d98d | 896 | return -ENODEV; |
d7380965 | 897 | #endif |
aa650bbd | 898 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 899 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 900 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 901 | #endif |
d550d98d | 902 | return -ENODEV; |
1da177e4 | 903 | } |
d550d98d | 904 | return 0; |
1da177e4 LT |
905 | } |
906 | ||
4be44fcd | 907 | static void __exit acpi_battery_exit(void) |
1da177e4 | 908 | { |
1da177e4 | 909 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 910 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 911 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 912 | #endif |
1da177e4 LT |
913 | } |
914 | ||
1da177e4 LT |
915 | module_init(acpi_battery_init); |
916 | module_exit(acpi_battery_exit); |