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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> |
d7380965 | 34 | |
fdcedbba | 35 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
36 | #include <linux/proc_fs.h> |
37 | #include <linux/seq_file.h> | |
38 | #include <asm/uaccess.h> | |
d7380965 | 39 | #endif |
1da177e4 LT |
40 | |
41 | #include <acpi/acpi_bus.h> | |
42 | #include <acpi/acpi_drivers.h> | |
43 | ||
97749cd9 | 44 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 | 45 | #include <linux/power_supply.h> |
97749cd9 | 46 | #endif |
d7380965 | 47 | |
1da177e4 LT |
48 | #define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF |
49 | ||
1da177e4 | 50 | #define ACPI_BATTERY_CLASS "battery" |
1da177e4 | 51 | #define ACPI_BATTERY_DEVICE_NAME "Battery" |
1da177e4 LT |
52 | #define ACPI_BATTERY_NOTIFY_STATUS 0x80 |
53 | #define ACPI_BATTERY_NOTIFY_INFO 0x81 | |
1da177e4 | 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 | ||
f1d4661a AS |
64 | static unsigned int cache_time = 1000; |
65 | module_param(cache_time, uint, 0644); | |
66 | MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); | |
b6ce4083 | 67 | |
fdcedbba | 68 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 RT |
69 | extern struct proc_dir_entry *acpi_lock_battery_dir(void); |
70 | extern void *acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir); | |
71 | ||
d7380965 AS |
72 | enum acpi_battery_files { |
73 | info_tag = 0, | |
74 | state_tag, | |
75 | alarm_tag, | |
76 | ACPI_BATTERY_NUMFILES, | |
77 | }; | |
78 | ||
79 | #endif | |
80 | ||
1ba90e3a TR |
81 | static const struct acpi_device_id battery_device_ids[] = { |
82 | {"PNP0C0A", 0}, | |
83 | {"", 0}, | |
84 | }; | |
1ba90e3a | 85 | |
aa650bbd | 86 | MODULE_DEVICE_TABLE(acpi, battery_device_ids); |
1da177e4 | 87 | |
78490d82 | 88 | |
1da177e4 | 89 | struct acpi_battery { |
038fdea2 | 90 | struct mutex lock; |
97749cd9 | 91 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 | 92 | struct power_supply bat; |
97749cd9 | 93 | #endif |
f1d4661a AS |
94 | struct acpi_device *device; |
95 | unsigned long update_time; | |
7faa144a | 96 | int rate_now; |
d7380965 AS |
97 | int capacity_now; |
98 | int voltage_now; | |
038fdea2 | 99 | int design_capacity; |
d7380965 | 100 | int full_charge_capacity; |
038fdea2 AS |
101 | int technology; |
102 | int design_voltage; | |
103 | int design_capacity_warning; | |
104 | int design_capacity_low; | |
105 | int capacity_granularity_1; | |
106 | int capacity_granularity_2; | |
f1d4661a | 107 | int alarm; |
038fdea2 AS |
108 | char model_number[32]; |
109 | char serial_number[32]; | |
110 | char type[32]; | |
111 | char oem_info[32]; | |
f1d4661a AS |
112 | int state; |
113 | int power_unit; | |
038fdea2 | 114 | u8 alarm_present; |
1da177e4 LT |
115 | }; |
116 | ||
d7380965 AS |
117 | #define to_acpi_battery(x) container_of(x, struct acpi_battery, bat); |
118 | ||
78490d82 | 119 | inline int acpi_battery_present(struct acpi_battery *battery) |
b6ce4083 | 120 | { |
78490d82 AS |
121 | return battery->device->status.battery_present; |
122 | } | |
038fdea2 | 123 | |
97749cd9 | 124 | #ifdef CONFIG_ACPI_SYSFS_POWER |
d7380965 AS |
125 | static int acpi_battery_technology(struct acpi_battery *battery) |
126 | { | |
127 | if (!strcasecmp("NiCd", battery->type)) | |
128 | return POWER_SUPPLY_TECHNOLOGY_NiCd; | |
129 | if (!strcasecmp("NiMH", battery->type)) | |
130 | return POWER_SUPPLY_TECHNOLOGY_NiMH; | |
131 | if (!strcasecmp("LION", battery->type)) | |
132 | return POWER_SUPPLY_TECHNOLOGY_LION; | |
ad40e68b | 133 | if (!strncasecmp("LI-ION", battery->type, 6)) |
0bde7eee | 134 | return POWER_SUPPLY_TECHNOLOGY_LION; |
d7380965 AS |
135 | if (!strcasecmp("LiP", battery->type)) |
136 | return POWER_SUPPLY_TECHNOLOGY_LIPO; | |
137 | return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; | |
138 | } | |
139 | ||
9104476e | 140 | static int acpi_battery_get_state(struct acpi_battery *battery); |
b19073a0 | 141 | |
56f382a0 RH |
142 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
143 | { | |
144 | /* either charging or discharging */ | |
145 | if (battery->state != 0) | |
146 | return 0; | |
147 | ||
148 | /* battery not reporting charge */ | |
149 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
150 | battery->capacity_now == 0) | |
151 | return 0; | |
152 | ||
153 | /* good batteries update full_charge as the batteries degrade */ | |
154 | if (battery->full_charge_capacity == battery->capacity_now) | |
155 | return 1; | |
156 | ||
157 | /* fallback to using design values for broken batteries */ | |
158 | if (battery->design_capacity == battery->capacity_now) | |
159 | return 1; | |
160 | ||
161 | /* we don't do any sort of metric based on percentages */ | |
162 | return 0; | |
163 | } | |
164 | ||
d7380965 AS |
165 | static int acpi_battery_get_property(struct power_supply *psy, |
166 | enum power_supply_property psp, | |
167 | union power_supply_propval *val) | |
168 | { | |
169 | struct acpi_battery *battery = to_acpi_battery(psy); | |
170 | ||
9104476e AS |
171 | if (acpi_battery_present(battery)) { |
172 | /* run battery update only if it is present */ | |
173 | acpi_battery_get_state(battery); | |
174 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
175 | return -ENODEV; |
176 | switch (psp) { | |
177 | case POWER_SUPPLY_PROP_STATUS: | |
178 | if (battery->state & 0x01) | |
179 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
180 | else if (battery->state & 0x02) | |
181 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
56f382a0 | 182 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 183 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
184 | else |
185 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
186 | break; |
187 | case POWER_SUPPLY_PROP_PRESENT: | |
188 | val->intval = acpi_battery_present(battery); | |
189 | break; | |
190 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
191 | val->intval = acpi_battery_technology(battery); | |
192 | break; | |
193 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
194 | val->intval = battery->design_voltage * 1000; | |
195 | break; | |
196 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
197 | val->intval = battery->voltage_now * 1000; | |
198 | break; | |
199 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
7faa144a AS |
200 | case POWER_SUPPLY_PROP_POWER_NOW: |
201 | val->intval = battery->rate_now * 1000; | |
d7380965 AS |
202 | break; |
203 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
204 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
205 | val->intval = battery->design_capacity * 1000; | |
206 | break; | |
207 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
208 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
209 | val->intval = battery->full_charge_capacity * 1000; | |
210 | break; | |
211 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
212 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
213 | val->intval = battery->capacity_now * 1000; | |
214 | break; | |
215 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
216 | val->strval = battery->model_number; | |
217 | break; | |
218 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
219 | val->strval = battery->oem_info; | |
220 | break; | |
7c2670bb | 221 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
222 | val->strval = battery->serial_number; | |
223 | break; | |
d7380965 AS |
224 | default: |
225 | return -EINVAL; | |
226 | } | |
227 | return 0; | |
228 | } | |
229 | ||
230 | static enum power_supply_property charge_battery_props[] = { | |
231 | POWER_SUPPLY_PROP_STATUS, | |
232 | POWER_SUPPLY_PROP_PRESENT, | |
233 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
234 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
235 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
236 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
237 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
238 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
239 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
240 | POWER_SUPPLY_PROP_MODEL_NAME, | |
241 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 242 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
243 | }; |
244 | ||
245 | static enum power_supply_property energy_battery_props[] = { | |
246 | POWER_SUPPLY_PROP_STATUS, | |
247 | POWER_SUPPLY_PROP_PRESENT, | |
248 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
249 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
250 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
251 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
7faa144a | 252 | POWER_SUPPLY_PROP_POWER_NOW, |
d7380965 AS |
253 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, |
254 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
255 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
256 | POWER_SUPPLY_PROP_MODEL_NAME, | |
257 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 258 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 | 259 | }; |
97749cd9 | 260 | #endif |
d7380965 | 261 | |
fdcedbba | 262 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 263 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 264 | { |
f1d4661a | 265 | return (battery->power_unit)?"mA":"mW"; |
b6ce4083 | 266 | } |
d7380965 | 267 | #endif |
b6ce4083 | 268 | |
78490d82 AS |
269 | /* -------------------------------------------------------------------------- |
270 | Battery Management | |
271 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
272 | struct acpi_offsets { |
273 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
274 | u8 mode; /* int or string? */ | |
275 | }; | |
b6ce4083 | 276 | |
038fdea2 AS |
277 | static struct acpi_offsets state_offsets[] = { |
278 | {offsetof(struct acpi_battery, state), 0}, | |
7faa144a | 279 | {offsetof(struct acpi_battery, rate_now), 0}, |
d7380965 AS |
280 | {offsetof(struct acpi_battery, capacity_now), 0}, |
281 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 282 | }; |
b6ce4083 | 283 | |
038fdea2 AS |
284 | static struct acpi_offsets info_offsets[] = { |
285 | {offsetof(struct acpi_battery, power_unit), 0}, | |
286 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 287 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
288 | {offsetof(struct acpi_battery, technology), 0}, |
289 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
290 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
291 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
292 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
293 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
294 | {offsetof(struct acpi_battery, model_number), 1}, | |
295 | {offsetof(struct acpi_battery, serial_number), 1}, | |
296 | {offsetof(struct acpi_battery, type), 1}, | |
297 | {offsetof(struct acpi_battery, oem_info), 1}, | |
298 | }; | |
b6ce4083 | 299 | |
038fdea2 AS |
300 | static int extract_package(struct acpi_battery *battery, |
301 | union acpi_object *package, | |
302 | struct acpi_offsets *offsets, int num) | |
303 | { | |
106449e8 | 304 | int i; |
038fdea2 AS |
305 | union acpi_object *element; |
306 | if (package->type != ACPI_TYPE_PACKAGE) | |
307 | return -EFAULT; | |
308 | for (i = 0; i < num; ++i) { | |
309 | if (package->package.count <= i) | |
310 | return -EFAULT; | |
311 | element = &package->package.elements[i]; | |
312 | if (offsets[i].mode) { | |
106449e8 AS |
313 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
314 | if (element->type == ACPI_TYPE_STRING || | |
315 | element->type == ACPI_TYPE_BUFFER) | |
316 | strncpy(ptr, element->string.pointer, 32); | |
317 | else if (element->type == ACPI_TYPE_INTEGER) { | |
318 | strncpy(ptr, (u8 *)&element->integer.value, | |
319 | sizeof(acpi_integer)); | |
320 | ptr[sizeof(acpi_integer)] = 0; | |
b8a1bdb1 AS |
321 | } else |
322 | *ptr = 0; /* don't have value */ | |
038fdea2 | 323 | } else { |
b8a1bdb1 AS |
324 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
325 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
326 | element->integer.value : -1; | |
038fdea2 | 327 | } |
b6ce4083 | 328 | } |
b6ce4083 VL |
329 | return 0; |
330 | } | |
331 | ||
332 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
333 | { | |
aa650bbd | 334 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
335 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
336 | return -ENODEV; | |
337 | } | |
aa650bbd | 338 | return 0; |
b6ce4083 VL |
339 | } |
340 | ||
341 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 342 | { |
aa650bbd | 343 | int result = -EFAULT; |
4be44fcd LB |
344 | acpi_status status = 0; |
345 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 346 | |
b6ce4083 VL |
347 | if (!acpi_battery_present(battery)) |
348 | return 0; | |
038fdea2 | 349 | mutex_lock(&battery->lock); |
f1d4661a | 350 | status = acpi_evaluate_object(battery->device->handle, "_BIF", |
038fdea2 AS |
351 | NULL, &buffer); |
352 | mutex_unlock(&battery->lock); | |
aa650bbd | 353 | |
1da177e4 | 354 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 355 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 356 | return -ENODEV; |
1da177e4 | 357 | } |
aa650bbd | 358 | |
038fdea2 AS |
359 | result = extract_package(battery, buffer.pointer, |
360 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 361 | kfree(buffer.pointer); |
d550d98d | 362 | return result; |
1da177e4 LT |
363 | } |
364 | ||
b6ce4083 | 365 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 366 | { |
4be44fcd LB |
367 | int result = 0; |
368 | acpi_status status = 0; | |
369 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 370 | |
b6ce4083 VL |
371 | if (!acpi_battery_present(battery)) |
372 | return 0; | |
1da177e4 | 373 | |
f1d4661a AS |
374 | if (battery->update_time && |
375 | time_before(jiffies, battery->update_time + | |
376 | msecs_to_jiffies(cache_time))) | |
377 | return 0; | |
378 | ||
038fdea2 | 379 | mutex_lock(&battery->lock); |
f1d4661a | 380 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
381 | NULL, &buffer); |
382 | mutex_unlock(&battery->lock); | |
5b31d895 | 383 | |
1da177e4 | 384 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 385 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 386 | return -ENODEV; |
1da177e4 | 387 | } |
aa650bbd | 388 | |
038fdea2 AS |
389 | result = extract_package(battery, buffer.pointer, |
390 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 391 | battery->update_time = jiffies; |
78490d82 | 392 | kfree(buffer.pointer); |
b6ce4083 VL |
393 | return result; |
394 | } | |
1da177e4 | 395 | |
aa650bbd | 396 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 397 | { |
4be44fcd | 398 | acpi_status status = 0; |
aa650bbd | 399 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 400 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 401 | |
aa650bbd | 402 | if (!acpi_battery_present(battery)|| !battery->alarm_present) |
d550d98d | 403 | return -ENODEV; |
1da177e4 | 404 | |
aa650bbd | 405 | arg0.integer.value = battery->alarm; |
1da177e4 | 406 | |
038fdea2 | 407 | mutex_lock(&battery->lock); |
f1d4661a AS |
408 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
409 | &arg_list, NULL); | |
038fdea2 | 410 | mutex_unlock(&battery->lock); |
aa650bbd | 411 | |
1da177e4 | 412 | if (ACPI_FAILURE(status)) |
d550d98d | 413 | return -ENODEV; |
1da177e4 | 414 | |
aa650bbd | 415 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 416 | return 0; |
1da177e4 LT |
417 | } |
418 | ||
b6ce4083 | 419 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 420 | { |
4be44fcd LB |
421 | acpi_status status = AE_OK; |
422 | acpi_handle handle = NULL; | |
4be44fcd | 423 | |
b6ce4083 | 424 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
425 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
426 | if (ACPI_FAILURE(status)) { | |
038fdea2 | 427 | battery->alarm_present = 0; |
f1d4661a | 428 | return 0; |
b6ce4083 | 429 | } |
f1d4661a AS |
430 | battery->alarm_present = 1; |
431 | if (!battery->alarm) | |
432 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 433 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 434 | } |
1da177e4 | 435 | |
97749cd9 | 436 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
437 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
438 | struct device_attribute *attr, | |
439 | char *buf) | |
440 | { | |
441 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
442 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
443 | } | |
444 | ||
445 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
446 | struct device_attribute *attr, | |
447 | const char *buf, size_t count) | |
448 | { | |
449 | unsigned long x; | |
450 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
451 | if (sscanf(buf, "%ld\n", &x) == 1) | |
452 | battery->alarm = x/1000; | |
453 | if (acpi_battery_present(battery)) | |
454 | acpi_battery_set_alarm(battery); | |
455 | return count; | |
456 | } | |
457 | ||
458 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 459 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
460 | .show = acpi_battery_alarm_show, |
461 | .store = acpi_battery_alarm_store, | |
462 | }; | |
463 | ||
464 | static int sysfs_add_battery(struct acpi_battery *battery) | |
465 | { | |
466 | int result; | |
467 | ||
508df92d AB |
468 | if (battery->power_unit) { |
469 | battery->bat.properties = charge_battery_props; | |
470 | battery->bat.num_properties = | |
471 | ARRAY_SIZE(charge_battery_props); | |
472 | } else { | |
473 | battery->bat.properties = energy_battery_props; | |
474 | battery->bat.num_properties = | |
475 | ARRAY_SIZE(energy_battery_props); | |
476 | } | |
477 | ||
478 | battery->bat.name = acpi_device_bid(battery->device); | |
479 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
480 | battery->bat.get_property = acpi_battery_get_property; | |
481 | ||
482 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
483 | if (result) | |
484 | return result; | |
485 | return device_create_file(battery->bat.dev, &alarm_attr); | |
486 | } | |
487 | ||
488 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
489 | { | |
490 | if (!battery->bat.dev) | |
491 | return; | |
492 | device_remove_file(battery->bat.dev, &alarm_attr); | |
493 | power_supply_unregister(&battery->bat); | |
9104476e | 494 | battery->bat.dev = NULL; |
508df92d | 495 | } |
97749cd9 | 496 | #endif |
508df92d | 497 | |
f1d4661a | 498 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 499 | { |
50b17851 | 500 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 501 | result = acpi_battery_get_status(battery); |
508df92d | 502 | if (result) |
b6ce4083 | 503 | return result; |
97749cd9 | 504 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
505 | if (!acpi_battery_present(battery)) { |
506 | sysfs_remove_battery(battery); | |
97749cd9 | 507 | battery->update_time = 0; |
508df92d | 508 | return 0; |
b6ce4083 | 509 | } |
97749cd9 | 510 | #endif |
50b17851 AS |
511 | if (!battery->update_time || |
512 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
513 | result = acpi_battery_get_info(battery); |
514 | if (result) | |
515 | return result; | |
516 | acpi_battery_init_alarm(battery); | |
517 | } | |
518 | #ifdef CONFIG_ACPI_SYSFS_POWER | |
508df92d AB |
519 | if (!battery->bat.dev) |
520 | sysfs_add_battery(battery); | |
97749cd9 | 521 | #endif |
f1d4661a | 522 | return acpi_battery_get_state(battery); |
4bd35cdb VL |
523 | } |
524 | ||
1da177e4 LT |
525 | /* -------------------------------------------------------------------------- |
526 | FS Interface (/proc) | |
527 | -------------------------------------------------------------------------- */ | |
528 | ||
fdcedbba | 529 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 530 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 531 | |
78490d82 | 532 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 533 | { |
50dd0969 | 534 | struct acpi_battery *battery = seq->private; |
1da177e4 | 535 | |
b6ce4083 | 536 | if (result) |
1da177e4 LT |
537 | goto end; |
538 | ||
aa650bbd AS |
539 | seq_printf(seq, "present: %s\n", |
540 | acpi_battery_present(battery)?"yes":"no"); | |
541 | if (!acpi_battery_present(battery)) | |
1da177e4 | 542 | goto end; |
038fdea2 | 543 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
544 | seq_printf(seq, "design capacity: unknown\n"); |
545 | else | |
546 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
547 | battery->design_capacity, |
548 | acpi_battery_units(battery)); | |
1da177e4 | 549 | |
d7380965 | 550 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
551 | seq_printf(seq, "last full capacity: unknown\n"); |
552 | else | |
553 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 554 | battery->full_charge_capacity, |
aa650bbd AS |
555 | acpi_battery_units(battery)); |
556 | ||
557 | seq_printf(seq, "battery technology: %srechargeable\n", | |
558 | (!battery->technology)?"non-":""); | |
1da177e4 | 559 | |
038fdea2 | 560 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
561 | seq_printf(seq, "design voltage: unknown\n"); |
562 | else | |
563 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 564 | battery->design_voltage); |
1da177e4 | 565 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
566 | battery->design_capacity_warning, |
567 | acpi_battery_units(battery)); | |
1da177e4 | 568 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
569 | battery->design_capacity_low, |
570 | acpi_battery_units(battery)); | |
1da177e4 | 571 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
572 | battery->capacity_granularity_1, |
573 | acpi_battery_units(battery)); | |
1da177e4 | 574 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
575 | battery->capacity_granularity_2, |
576 | acpi_battery_units(battery)); | |
038fdea2 AS |
577 | seq_printf(seq, "model number: %s\n", battery->model_number); |
578 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
579 | seq_printf(seq, "battery type: %s\n", battery->type); | |
580 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 581 | end: |
b6ce4083 VL |
582 | if (result) |
583 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
584 | return result; |
585 | } | |
586 | ||
78490d82 | 587 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 588 | { |
50dd0969 | 589 | struct acpi_battery *battery = seq->private; |
1da177e4 | 590 | |
b6ce4083 | 591 | if (result) |
1da177e4 LT |
592 | goto end; |
593 | ||
aa650bbd AS |
594 | seq_printf(seq, "present: %s\n", |
595 | acpi_battery_present(battery)?"yes":"no"); | |
596 | if (!acpi_battery_present(battery)) | |
1da177e4 | 597 | goto end; |
b6ce4083 | 598 | |
aa650bbd AS |
599 | seq_printf(seq, "capacity state: %s\n", |
600 | (battery->state & 0x04)?"critical":"ok"); | |
601 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
602 | seq_printf(seq, |
603 | "charging state: charging/discharging\n"); | |
aa650bbd | 604 | else if (battery->state & 0x01) |
1da177e4 | 605 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 606 | else if (battery->state & 0x02) |
1da177e4 | 607 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 608 | else |
1da177e4 | 609 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 610 | |
7faa144a | 611 | if (battery->rate_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
612 | seq_printf(seq, "present rate: unknown\n"); |
613 | else | |
614 | seq_printf(seq, "present rate: %d %s\n", | |
7faa144a | 615 | battery->rate_now, acpi_battery_units(battery)); |
1da177e4 | 616 | |
d7380965 | 617 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
618 | seq_printf(seq, "remaining capacity: unknown\n"); |
619 | else | |
620 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
621 | battery->capacity_now, acpi_battery_units(battery)); |
622 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
623 | seq_printf(seq, "present voltage: unknown\n"); |
624 | else | |
625 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 626 | battery->voltage_now); |
4be44fcd | 627 | end: |
aa650bbd | 628 | if (result) |
b6ce4083 | 629 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
630 | |
631 | return result; | |
632 | } | |
633 | ||
78490d82 | 634 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 635 | { |
50dd0969 | 636 | struct acpi_battery *battery = seq->private; |
1da177e4 | 637 | |
b6ce4083 | 638 | if (result) |
1da177e4 LT |
639 | goto end; |
640 | ||
b6ce4083 | 641 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
642 | seq_printf(seq, "present: no\n"); |
643 | goto end; | |
644 | } | |
1da177e4 LT |
645 | seq_printf(seq, "alarm: "); |
646 | if (!battery->alarm) | |
647 | seq_printf(seq, "unsupported\n"); | |
648 | else | |
aa650bbd AS |
649 | seq_printf(seq, "%u %sh\n", battery->alarm, |
650 | acpi_battery_units(battery)); | |
4be44fcd | 651 | end: |
b6ce4083 VL |
652 | if (result) |
653 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
654 | return result; |
655 | } | |
656 | ||
f1d4661a AS |
657 | static ssize_t acpi_battery_write_alarm(struct file *file, |
658 | const char __user * buffer, | |
659 | size_t count, loff_t * ppos) | |
1da177e4 | 660 | { |
4be44fcd LB |
661 | int result = 0; |
662 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
663 | struct seq_file *m = file->private_data; |
664 | struct acpi_battery *battery = m->private; | |
1da177e4 | 665 | |
1da177e4 | 666 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 667 | return -EINVAL; |
b6ce4083 VL |
668 | if (!acpi_battery_present(battery)) { |
669 | result = -ENODEV; | |
670 | goto end; | |
671 | } | |
b6ce4083 VL |
672 | if (copy_from_user(alarm_string, buffer, count)) { |
673 | result = -EFAULT; | |
674 | goto end; | |
675 | } | |
1da177e4 | 676 | alarm_string[count] = '\0'; |
f1d4661a | 677 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 678 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 679 | end: |
b6ce4083 | 680 | if (!result) |
f1d4661a | 681 | return count; |
78490d82 AS |
682 | return result; |
683 | } | |
684 | ||
685 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
686 | |
687 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
688 | acpi_battery_print_info, | |
689 | acpi_battery_print_state, | |
690 | acpi_battery_print_alarm, | |
78490d82 | 691 | }; |
b6ce4083 | 692 | |
78490d82 AS |
693 | static int acpi_battery_read(int fid, struct seq_file *seq) |
694 | { | |
695 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 696 | int result = acpi_battery_update(battery); |
aa650bbd | 697 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
698 | } |
699 | ||
aa650bbd AS |
700 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
701 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
702 | { \ | |
703 | return acpi_battery_read(_name##_tag, seq); \ | |
704 | } \ | |
705 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
706 | { \ | |
707 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
708 | } |
709 | ||
aa650bbd AS |
710 | DECLARE_FILE_FUNCTIONS(info); |
711 | DECLARE_FILE_FUNCTIONS(state); | |
712 | DECLARE_FILE_FUNCTIONS(alarm); | |
713 | ||
714 | #undef DECLARE_FILE_FUNCTIONS | |
715 | ||
716 | #define FILE_DESCRIPTION_RO(_name) \ | |
717 | { \ | |
718 | .name = __stringify(_name), \ | |
719 | .mode = S_IRUGO, \ | |
720 | .ops = { \ | |
721 | .open = acpi_battery_##_name##_open_fs, \ | |
722 | .read = seq_read, \ | |
723 | .llseek = seq_lseek, \ | |
724 | .release = single_release, \ | |
725 | .owner = THIS_MODULE, \ | |
726 | }, \ | |
727 | } | |
78490d82 | 728 | |
aa650bbd AS |
729 | #define FILE_DESCRIPTION_RW(_name) \ |
730 | { \ | |
731 | .name = __stringify(_name), \ | |
732 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
733 | .ops = { \ | |
734 | .open = acpi_battery_##_name##_open_fs, \ | |
735 | .read = seq_read, \ | |
736 | .llseek = seq_lseek, \ | |
737 | .write = acpi_battery_write_##_name, \ | |
738 | .release = single_release, \ | |
739 | .owner = THIS_MODULE, \ | |
740 | }, \ | |
741 | } | |
1da177e4 | 742 | |
78490d82 AS |
743 | static struct battery_file { |
744 | struct file_operations ops; | |
745 | mode_t mode; | |
070d8eb1 | 746 | const char *name; |
78490d82 | 747 | } acpi_battery_file[] = { |
aa650bbd AS |
748 | FILE_DESCRIPTION_RO(info), |
749 | FILE_DESCRIPTION_RO(state), | |
750 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
751 | }; |
752 | ||
aa650bbd AS |
753 | #undef FILE_DESCRIPTION_RO |
754 | #undef FILE_DESCRIPTION_RW | |
755 | ||
4be44fcd | 756 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 757 | { |
4be44fcd | 758 | struct proc_dir_entry *entry = NULL; |
78490d82 | 759 | int i; |
1da177e4 | 760 | |
1da177e4 LT |
761 | if (!acpi_device_dir(device)) { |
762 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 763 | acpi_battery_dir); |
1da177e4 | 764 | if (!acpi_device_dir(device)) |
d550d98d | 765 | return -ENODEV; |
1da177e4 LT |
766 | } |
767 | ||
78490d82 | 768 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
cf7acfab DL |
769 | entry = proc_create_data(acpi_battery_file[i].name, |
770 | acpi_battery_file[i].mode, | |
771 | acpi_device_dir(device), | |
772 | &acpi_battery_file[i].ops, | |
773 | acpi_driver_data(device)); | |
78490d82 AS |
774 | if (!entry) |
775 | return -ENODEV; | |
1da177e4 | 776 | } |
d550d98d | 777 | return 0; |
1da177e4 LT |
778 | } |
779 | ||
aa650bbd | 780 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 781 | { |
78490d82 | 782 | int i; |
aa650bbd AS |
783 | if (!acpi_device_dir(device)) |
784 | return; | |
785 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
786 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 787 | acpi_device_dir(device)); |
1da177e4 | 788 | |
aa650bbd AS |
789 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
790 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
791 | } |
792 | ||
d7380965 | 793 | #endif |
3e58ea0d | 794 | |
1da177e4 LT |
795 | /* -------------------------------------------------------------------------- |
796 | Driver Interface | |
797 | -------------------------------------------------------------------------- */ | |
798 | ||
4be44fcd | 799 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 800 | { |
50dd0969 | 801 | struct acpi_battery *battery = data; |
f1d4661a | 802 | struct acpi_device *device; |
1da177e4 | 803 | if (!battery) |
d550d98d | 804 | return; |
145def84 | 805 | device = battery->device; |
f1d4661a AS |
806 | acpi_battery_update(battery); |
807 | acpi_bus_generate_proc_event(device, event, | |
808 | acpi_battery_present(battery)); | |
809 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
0794469d | 810 | dev_name(&device->dev), event, |
9ea7d575 | 811 | acpi_battery_present(battery)); |
97749cd9 | 812 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
813 | /* acpi_batter_update could remove power_supply object */ |
814 | if (battery->bat.dev) | |
815 | kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); | |
97749cd9 | 816 | #endif |
1da177e4 LT |
817 | } |
818 | ||
4be44fcd | 819 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 820 | { |
4be44fcd LB |
821 | int result = 0; |
822 | acpi_status status = 0; | |
823 | struct acpi_battery *battery = NULL; | |
1da177e4 | 824 | if (!device) |
d550d98d | 825 | return -EINVAL; |
36bcbec7 | 826 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 827 | if (!battery) |
d550d98d | 828 | return -ENOMEM; |
145def84 | 829 | battery->device = device; |
1da177e4 LT |
830 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
831 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 832 | device->driver_data = battery; |
038fdea2 | 833 | mutex_init(&battery->lock); |
f1d4661a | 834 | acpi_battery_update(battery); |
fdcedbba | 835 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
836 | result = acpi_battery_add_fs(device); |
837 | if (result) | |
838 | goto end; | |
d7380965 | 839 | #endif |
3b073ec3 | 840 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 841 | ACPI_ALL_NOTIFY, |
4be44fcd | 842 | acpi_battery_notify, battery); |
1da177e4 | 843 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 844 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
845 | result = -ENODEV; |
846 | goto end; | |
847 | } | |
1da177e4 | 848 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
4be44fcd LB |
849 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
850 | device->status.battery_present ? "present" : "absent"); | |
4be44fcd | 851 | end: |
1da177e4 | 852 | if (result) { |
fdcedbba | 853 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 854 | acpi_battery_remove_fs(device); |
d7380965 | 855 | #endif |
1da177e4 LT |
856 | kfree(battery); |
857 | } | |
d550d98d | 858 | return result; |
1da177e4 LT |
859 | } |
860 | ||
4be44fcd | 861 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 862 | { |
4be44fcd LB |
863 | acpi_status status = 0; |
864 | struct acpi_battery *battery = NULL; | |
1da177e4 | 865 | |
1da177e4 | 866 | if (!device || !acpi_driver_data(device)) |
d550d98d | 867 | return -EINVAL; |
50dd0969 | 868 | battery = acpi_driver_data(device); |
3b073ec3 | 869 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 870 | ACPI_ALL_NOTIFY, |
4be44fcd | 871 | acpi_battery_notify); |
fdcedbba | 872 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 873 | acpi_battery_remove_fs(device); |
d7380965 | 874 | #endif |
97749cd9 | 875 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d | 876 | sysfs_remove_battery(battery); |
97749cd9 | 877 | #endif |
038fdea2 | 878 | mutex_destroy(&battery->lock); |
1da177e4 | 879 | kfree(battery); |
d550d98d | 880 | return 0; |
1da177e4 LT |
881 | } |
882 | ||
34c4415a | 883 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 884 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
885 | { |
886 | struct acpi_battery *battery; | |
34c4415a JK |
887 | if (!device) |
888 | return -EINVAL; | |
f1d4661a AS |
889 | battery = acpi_driver_data(device); |
890 | battery->update_time = 0; | |
508df92d | 891 | acpi_battery_update(battery); |
b6ce4083 | 892 | return 0; |
34c4415a JK |
893 | } |
894 | ||
aa650bbd AS |
895 | static struct acpi_driver acpi_battery_driver = { |
896 | .name = "battery", | |
897 | .class = ACPI_BATTERY_CLASS, | |
898 | .ids = battery_device_ids, | |
899 | .ops = { | |
900 | .add = acpi_battery_add, | |
901 | .resume = acpi_battery_resume, | |
902 | .remove = acpi_battery_remove, | |
903 | }, | |
904 | }; | |
905 | ||
b0cbc861 | 906 | static void __init acpi_battery_init_async(void *unused, async_cookie_t cookie) |
1da177e4 | 907 | { |
4d8316d5 | 908 | if (acpi_disabled) |
0f66af53 | 909 | return; |
fdcedbba | 910 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 911 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 912 | if (!acpi_battery_dir) |
0f66af53 | 913 | return; |
d7380965 | 914 | #endif |
aa650bbd | 915 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 916 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 917 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 918 | #endif |
0f66af53 | 919 | return; |
1da177e4 | 920 | } |
0f66af53 AV |
921 | return; |
922 | } | |
923 | ||
924 | static int __init acpi_battery_init(void) | |
925 | { | |
926 | async_schedule(acpi_battery_init_async, NULL); | |
d550d98d | 927 | return 0; |
1da177e4 LT |
928 | } |
929 | ||
4be44fcd | 930 | static void __exit acpi_battery_exit(void) |
1da177e4 | 931 | { |
1da177e4 | 932 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 933 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 934 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 935 | #endif |
1da177e4 LT |
936 | } |
937 | ||
1da177e4 LT |
938 | module_init(acpi_battery_init); |
939 | module_exit(acpi_battery_exit); |