Commit | Line | Data |
---|---|---|
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 | |
56f382a0 RH |
141 | static int acpi_battery_is_charged(struct acpi_battery *battery) |
142 | { | |
143 | /* either charging or discharging */ | |
144 | if (battery->state != 0) | |
145 | return 0; | |
146 | ||
147 | /* battery not reporting charge */ | |
148 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN || | |
149 | battery->capacity_now == 0) | |
150 | return 0; | |
151 | ||
152 | /* good batteries update full_charge as the batteries degrade */ | |
153 | if (battery->full_charge_capacity == battery->capacity_now) | |
154 | return 1; | |
155 | ||
156 | /* fallback to using design values for broken batteries */ | |
157 | if (battery->design_capacity == battery->capacity_now) | |
158 | return 1; | |
159 | ||
160 | /* we don't do any sort of metric based on percentages */ | |
161 | return 0; | |
162 | } | |
163 | ||
d7380965 AS |
164 | static int acpi_battery_get_property(struct power_supply *psy, |
165 | enum power_supply_property psp, | |
166 | union power_supply_propval *val) | |
167 | { | |
168 | struct acpi_battery *battery = to_acpi_battery(psy); | |
169 | ||
9104476e AS |
170 | if (acpi_battery_present(battery)) { |
171 | /* run battery update only if it is present */ | |
172 | acpi_battery_get_state(battery); | |
173 | } else if (psp != POWER_SUPPLY_PROP_PRESENT) | |
d7380965 AS |
174 | return -ENODEV; |
175 | switch (psp) { | |
176 | case POWER_SUPPLY_PROP_STATUS: | |
177 | if (battery->state & 0x01) | |
178 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; | |
179 | else if (battery->state & 0x02) | |
180 | val->intval = POWER_SUPPLY_STATUS_CHARGING; | |
56f382a0 | 181 | else if (acpi_battery_is_charged(battery)) |
d7380965 | 182 | val->intval = POWER_SUPPLY_STATUS_FULL; |
4c41d3ad RD |
183 | else |
184 | val->intval = POWER_SUPPLY_STATUS_UNKNOWN; | |
d7380965 AS |
185 | break; |
186 | case POWER_SUPPLY_PROP_PRESENT: | |
187 | val->intval = acpi_battery_present(battery); | |
188 | break; | |
189 | case POWER_SUPPLY_PROP_TECHNOLOGY: | |
190 | val->intval = acpi_battery_technology(battery); | |
191 | break; | |
192 | case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: | |
193 | val->intval = battery->design_voltage * 1000; | |
194 | break; | |
195 | case POWER_SUPPLY_PROP_VOLTAGE_NOW: | |
196 | val->intval = battery->voltage_now * 1000; | |
197 | break; | |
198 | case POWER_SUPPLY_PROP_CURRENT_NOW: | |
f10a3a32 | 199 | val->intval = battery->current_now * 1000; |
d7380965 AS |
200 | break; |
201 | case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: | |
202 | case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: | |
203 | val->intval = battery->design_capacity * 1000; | |
204 | break; | |
205 | case POWER_SUPPLY_PROP_CHARGE_FULL: | |
206 | case POWER_SUPPLY_PROP_ENERGY_FULL: | |
207 | val->intval = battery->full_charge_capacity * 1000; | |
208 | break; | |
209 | case POWER_SUPPLY_PROP_CHARGE_NOW: | |
210 | case POWER_SUPPLY_PROP_ENERGY_NOW: | |
211 | val->intval = battery->capacity_now * 1000; | |
212 | break; | |
213 | case POWER_SUPPLY_PROP_MODEL_NAME: | |
214 | val->strval = battery->model_number; | |
215 | break; | |
216 | case POWER_SUPPLY_PROP_MANUFACTURER: | |
217 | val->strval = battery->oem_info; | |
218 | break; | |
7c2670bb | 219 | case POWER_SUPPLY_PROP_SERIAL_NUMBER: |
220 | val->strval = battery->serial_number; | |
221 | break; | |
d7380965 AS |
222 | default: |
223 | return -EINVAL; | |
224 | } | |
225 | return 0; | |
226 | } | |
227 | ||
228 | static enum power_supply_property charge_battery_props[] = { | |
229 | POWER_SUPPLY_PROP_STATUS, | |
230 | POWER_SUPPLY_PROP_PRESENT, | |
231 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
232 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
233 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
234 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
235 | POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, | |
236 | POWER_SUPPLY_PROP_CHARGE_FULL, | |
237 | POWER_SUPPLY_PROP_CHARGE_NOW, | |
238 | POWER_SUPPLY_PROP_MODEL_NAME, | |
239 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 240 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 AS |
241 | }; |
242 | ||
243 | static enum power_supply_property energy_battery_props[] = { | |
244 | POWER_SUPPLY_PROP_STATUS, | |
245 | POWER_SUPPLY_PROP_PRESENT, | |
246 | POWER_SUPPLY_PROP_TECHNOLOGY, | |
247 | POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, | |
248 | POWER_SUPPLY_PROP_VOLTAGE_NOW, | |
249 | POWER_SUPPLY_PROP_CURRENT_NOW, | |
250 | POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, | |
251 | POWER_SUPPLY_PROP_ENERGY_FULL, | |
252 | POWER_SUPPLY_PROP_ENERGY_NOW, | |
253 | POWER_SUPPLY_PROP_MODEL_NAME, | |
254 | POWER_SUPPLY_PROP_MANUFACTURER, | |
7c2670bb | 255 | POWER_SUPPLY_PROP_SERIAL_NUMBER, |
d7380965 | 256 | }; |
97749cd9 | 257 | #endif |
d7380965 | 258 | |
fdcedbba | 259 | #ifdef CONFIG_ACPI_PROCFS_POWER |
f1d4661a | 260 | inline char *acpi_battery_units(struct acpi_battery *battery) |
78490d82 | 261 | { |
f1d4661a | 262 | return (battery->power_unit)?"mA":"mW"; |
b6ce4083 | 263 | } |
d7380965 | 264 | #endif |
b6ce4083 | 265 | |
78490d82 AS |
266 | /* -------------------------------------------------------------------------- |
267 | Battery Management | |
268 | -------------------------------------------------------------------------- */ | |
038fdea2 AS |
269 | struct acpi_offsets { |
270 | size_t offset; /* offset inside struct acpi_sbs_battery */ | |
271 | u8 mode; /* int or string? */ | |
272 | }; | |
b6ce4083 | 273 | |
038fdea2 AS |
274 | static struct acpi_offsets state_offsets[] = { |
275 | {offsetof(struct acpi_battery, state), 0}, | |
d7380965 AS |
276 | {offsetof(struct acpi_battery, current_now), 0}, |
277 | {offsetof(struct acpi_battery, capacity_now), 0}, | |
278 | {offsetof(struct acpi_battery, voltage_now), 0}, | |
038fdea2 | 279 | }; |
b6ce4083 | 280 | |
038fdea2 AS |
281 | static struct acpi_offsets info_offsets[] = { |
282 | {offsetof(struct acpi_battery, power_unit), 0}, | |
283 | {offsetof(struct acpi_battery, design_capacity), 0}, | |
d7380965 | 284 | {offsetof(struct acpi_battery, full_charge_capacity), 0}, |
038fdea2 AS |
285 | {offsetof(struct acpi_battery, technology), 0}, |
286 | {offsetof(struct acpi_battery, design_voltage), 0}, | |
287 | {offsetof(struct acpi_battery, design_capacity_warning), 0}, | |
288 | {offsetof(struct acpi_battery, design_capacity_low), 0}, | |
289 | {offsetof(struct acpi_battery, capacity_granularity_1), 0}, | |
290 | {offsetof(struct acpi_battery, capacity_granularity_2), 0}, | |
291 | {offsetof(struct acpi_battery, model_number), 1}, | |
292 | {offsetof(struct acpi_battery, serial_number), 1}, | |
293 | {offsetof(struct acpi_battery, type), 1}, | |
294 | {offsetof(struct acpi_battery, oem_info), 1}, | |
295 | }; | |
b6ce4083 | 296 | |
038fdea2 AS |
297 | static int extract_package(struct acpi_battery *battery, |
298 | union acpi_object *package, | |
299 | struct acpi_offsets *offsets, int num) | |
300 | { | |
106449e8 | 301 | int i; |
038fdea2 AS |
302 | union acpi_object *element; |
303 | if (package->type != ACPI_TYPE_PACKAGE) | |
304 | return -EFAULT; | |
305 | for (i = 0; i < num; ++i) { | |
306 | if (package->package.count <= i) | |
307 | return -EFAULT; | |
308 | element = &package->package.elements[i]; | |
309 | if (offsets[i].mode) { | |
106449e8 AS |
310 | u8 *ptr = (u8 *)battery + offsets[i].offset; |
311 | if (element->type == ACPI_TYPE_STRING || | |
312 | element->type == ACPI_TYPE_BUFFER) | |
313 | strncpy(ptr, element->string.pointer, 32); | |
314 | else if (element->type == ACPI_TYPE_INTEGER) { | |
315 | strncpy(ptr, (u8 *)&element->integer.value, | |
316 | sizeof(acpi_integer)); | |
317 | ptr[sizeof(acpi_integer)] = 0; | |
b8a1bdb1 AS |
318 | } else |
319 | *ptr = 0; /* don't have value */ | |
038fdea2 | 320 | } else { |
b8a1bdb1 AS |
321 | int *x = (int *)((u8 *)battery + offsets[i].offset); |
322 | *x = (element->type == ACPI_TYPE_INTEGER) ? | |
323 | element->integer.value : -1; | |
038fdea2 | 324 | } |
b6ce4083 | 325 | } |
b6ce4083 VL |
326 | return 0; |
327 | } | |
328 | ||
329 | static int acpi_battery_get_status(struct acpi_battery *battery) | |
330 | { | |
aa650bbd | 331 | if (acpi_bus_get_status(battery->device)) { |
b6ce4083 VL |
332 | ACPI_EXCEPTION((AE_INFO, AE_ERROR, "Evaluating _STA")); |
333 | return -ENODEV; | |
334 | } | |
aa650bbd | 335 | return 0; |
b6ce4083 VL |
336 | } |
337 | ||
338 | static int acpi_battery_get_info(struct acpi_battery *battery) | |
1da177e4 | 339 | { |
aa650bbd | 340 | int result = -EFAULT; |
4be44fcd LB |
341 | acpi_status status = 0; |
342 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 343 | |
b6ce4083 VL |
344 | if (!acpi_battery_present(battery)) |
345 | return 0; | |
038fdea2 | 346 | mutex_lock(&battery->lock); |
f1d4661a | 347 | status = acpi_evaluate_object(battery->device->handle, "_BIF", |
038fdea2 AS |
348 | NULL, &buffer); |
349 | mutex_unlock(&battery->lock); | |
aa650bbd | 350 | |
1da177e4 | 351 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 352 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BIF")); |
d550d98d | 353 | return -ENODEV; |
1da177e4 | 354 | } |
aa650bbd | 355 | |
038fdea2 AS |
356 | result = extract_package(battery, buffer.pointer, |
357 | info_offsets, ARRAY_SIZE(info_offsets)); | |
78490d82 | 358 | kfree(buffer.pointer); |
d550d98d | 359 | return result; |
1da177e4 LT |
360 | } |
361 | ||
b6ce4083 | 362 | static int acpi_battery_get_state(struct acpi_battery *battery) |
1da177e4 | 363 | { |
4be44fcd LB |
364 | int result = 0; |
365 | acpi_status status = 0; | |
366 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
1da177e4 | 367 | |
b6ce4083 VL |
368 | if (!acpi_battery_present(battery)) |
369 | return 0; | |
1da177e4 | 370 | |
f1d4661a AS |
371 | if (battery->update_time && |
372 | time_before(jiffies, battery->update_time + | |
373 | msecs_to_jiffies(cache_time))) | |
374 | return 0; | |
375 | ||
038fdea2 | 376 | mutex_lock(&battery->lock); |
f1d4661a | 377 | status = acpi_evaluate_object(battery->device->handle, "_BST", |
038fdea2 AS |
378 | NULL, &buffer); |
379 | mutex_unlock(&battery->lock); | |
5b31d895 | 380 | |
1da177e4 | 381 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 382 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _BST")); |
d550d98d | 383 | return -ENODEV; |
1da177e4 | 384 | } |
aa650bbd | 385 | |
038fdea2 AS |
386 | result = extract_package(battery, buffer.pointer, |
387 | state_offsets, ARRAY_SIZE(state_offsets)); | |
f1d4661a | 388 | battery->update_time = jiffies; |
78490d82 | 389 | kfree(buffer.pointer); |
b6ce4083 VL |
390 | return result; |
391 | } | |
1da177e4 | 392 | |
aa650bbd | 393 | static int acpi_battery_set_alarm(struct acpi_battery *battery) |
1da177e4 | 394 | { |
4be44fcd | 395 | acpi_status status = 0; |
aa650bbd | 396 | union acpi_object arg0 = { .type = ACPI_TYPE_INTEGER }; |
4be44fcd | 397 | struct acpi_object_list arg_list = { 1, &arg0 }; |
1da177e4 | 398 | |
aa650bbd | 399 | if (!acpi_battery_present(battery)|| !battery->alarm_present) |
d550d98d | 400 | return -ENODEV; |
1da177e4 | 401 | |
aa650bbd | 402 | arg0.integer.value = battery->alarm; |
1da177e4 | 403 | |
038fdea2 | 404 | mutex_lock(&battery->lock); |
f1d4661a AS |
405 | status = acpi_evaluate_object(battery->device->handle, "_BTP", |
406 | &arg_list, NULL); | |
038fdea2 | 407 | mutex_unlock(&battery->lock); |
aa650bbd | 408 | |
1da177e4 | 409 | if (ACPI_FAILURE(status)) |
d550d98d | 410 | return -ENODEV; |
1da177e4 | 411 | |
aa650bbd | 412 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Alarm set to %d\n", battery->alarm)); |
d550d98d | 413 | return 0; |
1da177e4 LT |
414 | } |
415 | ||
b6ce4083 | 416 | static int acpi_battery_init_alarm(struct acpi_battery *battery) |
1da177e4 | 417 | { |
4be44fcd LB |
418 | acpi_status status = AE_OK; |
419 | acpi_handle handle = NULL; | |
4be44fcd | 420 | |
b6ce4083 | 421 | /* See if alarms are supported, and if so, set default */ |
f1d4661a AS |
422 | status = acpi_get_handle(battery->device->handle, "_BTP", &handle); |
423 | if (ACPI_FAILURE(status)) { | |
038fdea2 | 424 | battery->alarm_present = 0; |
f1d4661a | 425 | return 0; |
b6ce4083 | 426 | } |
f1d4661a AS |
427 | battery->alarm_present = 1; |
428 | if (!battery->alarm) | |
429 | battery->alarm = battery->design_capacity_warning; | |
aa650bbd | 430 | return acpi_battery_set_alarm(battery); |
b6ce4083 | 431 | } |
1da177e4 | 432 | |
97749cd9 | 433 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
434 | static ssize_t acpi_battery_alarm_show(struct device *dev, |
435 | struct device_attribute *attr, | |
436 | char *buf) | |
437 | { | |
438 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
439 | return sprintf(buf, "%d\n", battery->alarm * 1000); | |
440 | } | |
441 | ||
442 | static ssize_t acpi_battery_alarm_store(struct device *dev, | |
443 | struct device_attribute *attr, | |
444 | const char *buf, size_t count) | |
445 | { | |
446 | unsigned long x; | |
447 | struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); | |
448 | if (sscanf(buf, "%ld\n", &x) == 1) | |
449 | battery->alarm = x/1000; | |
450 | if (acpi_battery_present(battery)) | |
451 | acpi_battery_set_alarm(battery); | |
452 | return count; | |
453 | } | |
454 | ||
455 | static struct device_attribute alarm_attr = { | |
01e8ef11 | 456 | .attr = {.name = "alarm", .mode = 0644}, |
508df92d AB |
457 | .show = acpi_battery_alarm_show, |
458 | .store = acpi_battery_alarm_store, | |
459 | }; | |
460 | ||
461 | static int sysfs_add_battery(struct acpi_battery *battery) | |
462 | { | |
463 | int result; | |
464 | ||
508df92d AB |
465 | if (battery->power_unit) { |
466 | battery->bat.properties = charge_battery_props; | |
467 | battery->bat.num_properties = | |
468 | ARRAY_SIZE(charge_battery_props); | |
469 | } else { | |
470 | battery->bat.properties = energy_battery_props; | |
471 | battery->bat.num_properties = | |
472 | ARRAY_SIZE(energy_battery_props); | |
473 | } | |
474 | ||
475 | battery->bat.name = acpi_device_bid(battery->device); | |
476 | battery->bat.type = POWER_SUPPLY_TYPE_BATTERY; | |
477 | battery->bat.get_property = acpi_battery_get_property; | |
478 | ||
479 | result = power_supply_register(&battery->device->dev, &battery->bat); | |
480 | if (result) | |
481 | return result; | |
482 | return device_create_file(battery->bat.dev, &alarm_attr); | |
483 | } | |
484 | ||
485 | static void sysfs_remove_battery(struct acpi_battery *battery) | |
486 | { | |
487 | if (!battery->bat.dev) | |
488 | return; | |
489 | device_remove_file(battery->bat.dev, &alarm_attr); | |
490 | power_supply_unregister(&battery->bat); | |
9104476e | 491 | battery->bat.dev = NULL; |
508df92d | 492 | } |
97749cd9 | 493 | #endif |
508df92d | 494 | |
f1d4661a | 495 | static int acpi_battery_update(struct acpi_battery *battery) |
b6ce4083 | 496 | { |
50b17851 | 497 | int result, old_present = acpi_battery_present(battery); |
97749cd9 | 498 | result = acpi_battery_get_status(battery); |
508df92d | 499 | if (result) |
b6ce4083 | 500 | return result; |
97749cd9 | 501 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
502 | if (!acpi_battery_present(battery)) { |
503 | sysfs_remove_battery(battery); | |
97749cd9 | 504 | battery->update_time = 0; |
508df92d | 505 | return 0; |
b6ce4083 | 506 | } |
97749cd9 | 507 | #endif |
50b17851 AS |
508 | if (!battery->update_time || |
509 | old_present != acpi_battery_present(battery)) { | |
97749cd9 AS |
510 | result = acpi_battery_get_info(battery); |
511 | if (result) | |
512 | return result; | |
513 | acpi_battery_init_alarm(battery); | |
514 | } | |
515 | #ifdef CONFIG_ACPI_SYSFS_POWER | |
508df92d AB |
516 | if (!battery->bat.dev) |
517 | sysfs_add_battery(battery); | |
97749cd9 | 518 | #endif |
f1d4661a | 519 | return acpi_battery_get_state(battery); |
4bd35cdb VL |
520 | } |
521 | ||
1da177e4 LT |
522 | /* -------------------------------------------------------------------------- |
523 | FS Interface (/proc) | |
524 | -------------------------------------------------------------------------- */ | |
525 | ||
fdcedbba | 526 | #ifdef CONFIG_ACPI_PROCFS_POWER |
4be44fcd | 527 | static struct proc_dir_entry *acpi_battery_dir; |
b6ce4083 | 528 | |
78490d82 | 529 | static int acpi_battery_print_info(struct seq_file *seq, int result) |
1da177e4 | 530 | { |
50dd0969 | 531 | struct acpi_battery *battery = seq->private; |
1da177e4 | 532 | |
b6ce4083 | 533 | if (result) |
1da177e4 LT |
534 | goto end; |
535 | ||
aa650bbd AS |
536 | seq_printf(seq, "present: %s\n", |
537 | acpi_battery_present(battery)?"yes":"no"); | |
538 | if (!acpi_battery_present(battery)) | |
1da177e4 | 539 | goto end; |
038fdea2 | 540 | if (battery->design_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
541 | seq_printf(seq, "design capacity: unknown\n"); |
542 | else | |
543 | seq_printf(seq, "design capacity: %d %sh\n", | |
aa650bbd AS |
544 | battery->design_capacity, |
545 | acpi_battery_units(battery)); | |
1da177e4 | 546 | |
d7380965 | 547 | if (battery->full_charge_capacity == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
548 | seq_printf(seq, "last full capacity: unknown\n"); |
549 | else | |
550 | seq_printf(seq, "last full capacity: %d %sh\n", | |
d7380965 | 551 | battery->full_charge_capacity, |
aa650bbd AS |
552 | acpi_battery_units(battery)); |
553 | ||
554 | seq_printf(seq, "battery technology: %srechargeable\n", | |
555 | (!battery->technology)?"non-":""); | |
1da177e4 | 556 | |
038fdea2 | 557 | if (battery->design_voltage == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
558 | seq_printf(seq, "design voltage: unknown\n"); |
559 | else | |
560 | seq_printf(seq, "design voltage: %d mV\n", | |
aa650bbd | 561 | battery->design_voltage); |
1da177e4 | 562 | seq_printf(seq, "design capacity warning: %d %sh\n", |
aa650bbd AS |
563 | battery->design_capacity_warning, |
564 | acpi_battery_units(battery)); | |
1da177e4 | 565 | seq_printf(seq, "design capacity low: %d %sh\n", |
aa650bbd AS |
566 | battery->design_capacity_low, |
567 | acpi_battery_units(battery)); | |
1da177e4 | 568 | seq_printf(seq, "capacity granularity 1: %d %sh\n", |
aa650bbd AS |
569 | battery->capacity_granularity_1, |
570 | acpi_battery_units(battery)); | |
1da177e4 | 571 | seq_printf(seq, "capacity granularity 2: %d %sh\n", |
aa650bbd AS |
572 | battery->capacity_granularity_2, |
573 | acpi_battery_units(battery)); | |
038fdea2 AS |
574 | seq_printf(seq, "model number: %s\n", battery->model_number); |
575 | seq_printf(seq, "serial number: %s\n", battery->serial_number); | |
576 | seq_printf(seq, "battery type: %s\n", battery->type); | |
577 | seq_printf(seq, "OEM info: %s\n", battery->oem_info); | |
4be44fcd | 578 | end: |
b6ce4083 VL |
579 | if (result) |
580 | seq_printf(seq, "ERROR: Unable to read battery info\n"); | |
b6ce4083 VL |
581 | return result; |
582 | } | |
583 | ||
78490d82 | 584 | static int acpi_battery_print_state(struct seq_file *seq, int result) |
1da177e4 | 585 | { |
50dd0969 | 586 | struct acpi_battery *battery = seq->private; |
1da177e4 | 587 | |
b6ce4083 | 588 | if (result) |
1da177e4 LT |
589 | goto end; |
590 | ||
aa650bbd AS |
591 | seq_printf(seq, "present: %s\n", |
592 | acpi_battery_present(battery)?"yes":"no"); | |
593 | if (!acpi_battery_present(battery)) | |
1da177e4 | 594 | goto end; |
b6ce4083 | 595 | |
aa650bbd AS |
596 | seq_printf(seq, "capacity state: %s\n", |
597 | (battery->state & 0x04)?"critical":"ok"); | |
598 | if ((battery->state & 0x01) && (battery->state & 0x02)) | |
4be44fcd LB |
599 | seq_printf(seq, |
600 | "charging state: charging/discharging\n"); | |
aa650bbd | 601 | else if (battery->state & 0x01) |
1da177e4 | 602 | seq_printf(seq, "charging state: discharging\n"); |
038fdea2 | 603 | else if (battery->state & 0x02) |
1da177e4 | 604 | seq_printf(seq, "charging state: charging\n"); |
aa650bbd | 605 | else |
1da177e4 | 606 | seq_printf(seq, "charging state: charged\n"); |
1da177e4 | 607 | |
d7380965 | 608 | if (battery->current_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
609 | seq_printf(seq, "present rate: unknown\n"); |
610 | else | |
611 | seq_printf(seq, "present rate: %d %s\n", | |
d7380965 | 612 | battery->current_now, acpi_battery_units(battery)); |
1da177e4 | 613 | |
d7380965 | 614 | if (battery->capacity_now == ACPI_BATTERY_VALUE_UNKNOWN) |
1da177e4 LT |
615 | seq_printf(seq, "remaining capacity: unknown\n"); |
616 | else | |
617 | seq_printf(seq, "remaining capacity: %d %sh\n", | |
d7380965 AS |
618 | battery->capacity_now, acpi_battery_units(battery)); |
619 | if (battery->voltage_now == ACPI_BATTERY_VALUE_UNKNOWN) | |
1da177e4 LT |
620 | seq_printf(seq, "present voltage: unknown\n"); |
621 | else | |
622 | seq_printf(seq, "present voltage: %d mV\n", | |
d7380965 | 623 | battery->voltage_now); |
4be44fcd | 624 | end: |
aa650bbd | 625 | if (result) |
b6ce4083 | 626 | seq_printf(seq, "ERROR: Unable to read battery state\n"); |
b6ce4083 VL |
627 | |
628 | return result; | |
629 | } | |
630 | ||
78490d82 | 631 | static int acpi_battery_print_alarm(struct seq_file *seq, int result) |
1da177e4 | 632 | { |
50dd0969 | 633 | struct acpi_battery *battery = seq->private; |
1da177e4 | 634 | |
b6ce4083 | 635 | if (result) |
1da177e4 LT |
636 | goto end; |
637 | ||
b6ce4083 | 638 | if (!acpi_battery_present(battery)) { |
1da177e4 LT |
639 | seq_printf(seq, "present: no\n"); |
640 | goto end; | |
641 | } | |
1da177e4 LT |
642 | seq_printf(seq, "alarm: "); |
643 | if (!battery->alarm) | |
644 | seq_printf(seq, "unsupported\n"); | |
645 | else | |
aa650bbd AS |
646 | seq_printf(seq, "%u %sh\n", battery->alarm, |
647 | acpi_battery_units(battery)); | |
4be44fcd | 648 | end: |
b6ce4083 VL |
649 | if (result) |
650 | seq_printf(seq, "ERROR: Unable to read battery alarm\n"); | |
b6ce4083 VL |
651 | return result; |
652 | } | |
653 | ||
f1d4661a AS |
654 | static ssize_t acpi_battery_write_alarm(struct file *file, |
655 | const char __user * buffer, | |
656 | size_t count, loff_t * ppos) | |
1da177e4 | 657 | { |
4be44fcd LB |
658 | int result = 0; |
659 | char alarm_string[12] = { '\0' }; | |
50dd0969 JE |
660 | struct seq_file *m = file->private_data; |
661 | struct acpi_battery *battery = m->private; | |
1da177e4 | 662 | |
1da177e4 | 663 | if (!battery || (count > sizeof(alarm_string) - 1)) |
d550d98d | 664 | return -EINVAL; |
b6ce4083 VL |
665 | if (!acpi_battery_present(battery)) { |
666 | result = -ENODEV; | |
667 | goto end; | |
668 | } | |
b6ce4083 VL |
669 | if (copy_from_user(alarm_string, buffer, count)) { |
670 | result = -EFAULT; | |
671 | goto end; | |
672 | } | |
1da177e4 | 673 | alarm_string[count] = '\0'; |
f1d4661a | 674 | battery->alarm = simple_strtol(alarm_string, NULL, 0); |
aa650bbd | 675 | result = acpi_battery_set_alarm(battery); |
b6ce4083 | 676 | end: |
b6ce4083 | 677 | if (!result) |
f1d4661a | 678 | return count; |
78490d82 AS |
679 | return result; |
680 | } | |
681 | ||
682 | typedef int(*print_func)(struct seq_file *seq, int result); | |
aa650bbd AS |
683 | |
684 | static print_func acpi_print_funcs[ACPI_BATTERY_NUMFILES] = { | |
685 | acpi_battery_print_info, | |
686 | acpi_battery_print_state, | |
687 | acpi_battery_print_alarm, | |
78490d82 | 688 | }; |
b6ce4083 | 689 | |
78490d82 AS |
690 | static int acpi_battery_read(int fid, struct seq_file *seq) |
691 | { | |
692 | struct acpi_battery *battery = seq->private; | |
f1d4661a | 693 | int result = acpi_battery_update(battery); |
aa650bbd | 694 | return acpi_print_funcs[fid](seq, result); |
78490d82 AS |
695 | } |
696 | ||
aa650bbd AS |
697 | #define DECLARE_FILE_FUNCTIONS(_name) \ |
698 | static int acpi_battery_read_##_name(struct seq_file *seq, void *offset) \ | |
699 | { \ | |
700 | return acpi_battery_read(_name##_tag, seq); \ | |
701 | } \ | |
702 | static int acpi_battery_##_name##_open_fs(struct inode *inode, struct file *file) \ | |
703 | { \ | |
704 | return single_open(file, acpi_battery_read_##_name, PDE(inode)->data); \ | |
78490d82 AS |
705 | } |
706 | ||
aa650bbd AS |
707 | DECLARE_FILE_FUNCTIONS(info); |
708 | DECLARE_FILE_FUNCTIONS(state); | |
709 | DECLARE_FILE_FUNCTIONS(alarm); | |
710 | ||
711 | #undef DECLARE_FILE_FUNCTIONS | |
712 | ||
713 | #define FILE_DESCRIPTION_RO(_name) \ | |
714 | { \ | |
715 | .name = __stringify(_name), \ | |
716 | .mode = S_IRUGO, \ | |
717 | .ops = { \ | |
718 | .open = acpi_battery_##_name##_open_fs, \ | |
719 | .read = seq_read, \ | |
720 | .llseek = seq_lseek, \ | |
721 | .release = single_release, \ | |
722 | .owner = THIS_MODULE, \ | |
723 | }, \ | |
724 | } | |
78490d82 | 725 | |
aa650bbd AS |
726 | #define FILE_DESCRIPTION_RW(_name) \ |
727 | { \ | |
728 | .name = __stringify(_name), \ | |
729 | .mode = S_IFREG | S_IRUGO | S_IWUSR, \ | |
730 | .ops = { \ | |
731 | .open = acpi_battery_##_name##_open_fs, \ | |
732 | .read = seq_read, \ | |
733 | .llseek = seq_lseek, \ | |
734 | .write = acpi_battery_write_##_name, \ | |
735 | .release = single_release, \ | |
736 | .owner = THIS_MODULE, \ | |
737 | }, \ | |
738 | } | |
1da177e4 | 739 | |
78490d82 AS |
740 | static struct battery_file { |
741 | struct file_operations ops; | |
742 | mode_t mode; | |
743 | char *name; | |
744 | } acpi_battery_file[] = { | |
aa650bbd AS |
745 | FILE_DESCRIPTION_RO(info), |
746 | FILE_DESCRIPTION_RO(state), | |
747 | FILE_DESCRIPTION_RW(alarm), | |
1da177e4 LT |
748 | }; |
749 | ||
aa650bbd AS |
750 | #undef FILE_DESCRIPTION_RO |
751 | #undef FILE_DESCRIPTION_RW | |
752 | ||
4be44fcd | 753 | static int acpi_battery_add_fs(struct acpi_device *device) |
1da177e4 | 754 | { |
4be44fcd | 755 | struct proc_dir_entry *entry = NULL; |
78490d82 | 756 | int i; |
1da177e4 | 757 | |
1da177e4 LT |
758 | if (!acpi_device_dir(device)) { |
759 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 760 | acpi_battery_dir); |
1da177e4 | 761 | if (!acpi_device_dir(device)) |
d550d98d | 762 | return -ENODEV; |
1da177e4 LT |
763 | acpi_device_dir(device)->owner = THIS_MODULE; |
764 | } | |
765 | ||
78490d82 | 766 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) { |
cf7acfab DL |
767 | entry = proc_create_data(acpi_battery_file[i].name, |
768 | acpi_battery_file[i].mode, | |
769 | acpi_device_dir(device), | |
770 | &acpi_battery_file[i].ops, | |
771 | acpi_driver_data(device)); | |
78490d82 AS |
772 | if (!entry) |
773 | return -ENODEV; | |
1da177e4 | 774 | } |
d550d98d | 775 | return 0; |
1da177e4 LT |
776 | } |
777 | ||
aa650bbd | 778 | static void acpi_battery_remove_fs(struct acpi_device *device) |
1da177e4 | 779 | { |
78490d82 | 780 | int i; |
aa650bbd AS |
781 | if (!acpi_device_dir(device)) |
782 | return; | |
783 | for (i = 0; i < ACPI_BATTERY_NUMFILES; ++i) | |
784 | remove_proc_entry(acpi_battery_file[i].name, | |
1da177e4 | 785 | acpi_device_dir(device)); |
1da177e4 | 786 | |
aa650bbd AS |
787 | remove_proc_entry(acpi_device_bid(device), acpi_battery_dir); |
788 | acpi_device_dir(device) = NULL; | |
1da177e4 LT |
789 | } |
790 | ||
d7380965 | 791 | #endif |
3e58ea0d | 792 | |
1da177e4 LT |
793 | /* -------------------------------------------------------------------------- |
794 | Driver Interface | |
795 | -------------------------------------------------------------------------- */ | |
796 | ||
4be44fcd | 797 | static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 798 | { |
50dd0969 | 799 | struct acpi_battery *battery = data; |
f1d4661a | 800 | struct acpi_device *device; |
1da177e4 | 801 | if (!battery) |
d550d98d | 802 | return; |
145def84 | 803 | device = battery->device; |
f1d4661a AS |
804 | acpi_battery_update(battery); |
805 | acpi_bus_generate_proc_event(device, event, | |
806 | acpi_battery_present(battery)); | |
807 | acpi_bus_generate_netlink_event(device->pnp.device_class, | |
0794469d | 808 | dev_name(&device->dev), event, |
9ea7d575 | 809 | acpi_battery_present(battery)); |
97749cd9 | 810 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d AB |
811 | /* acpi_batter_update could remove power_supply object */ |
812 | if (battery->bat.dev) | |
813 | kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE); | |
97749cd9 | 814 | #endif |
1da177e4 LT |
815 | } |
816 | ||
4be44fcd | 817 | static int acpi_battery_add(struct acpi_device *device) |
1da177e4 | 818 | { |
4be44fcd LB |
819 | int result = 0; |
820 | acpi_status status = 0; | |
821 | struct acpi_battery *battery = NULL; | |
1da177e4 | 822 | if (!device) |
d550d98d | 823 | return -EINVAL; |
36bcbec7 | 824 | battery = kzalloc(sizeof(struct acpi_battery), GFP_KERNEL); |
1da177e4 | 825 | if (!battery) |
d550d98d | 826 | return -ENOMEM; |
145def84 | 827 | battery->device = device; |
1da177e4 LT |
828 | strcpy(acpi_device_name(device), ACPI_BATTERY_DEVICE_NAME); |
829 | strcpy(acpi_device_class(device), ACPI_BATTERY_CLASS); | |
db89b4f0 | 830 | device->driver_data = battery; |
038fdea2 | 831 | mutex_init(&battery->lock); |
f1d4661a | 832 | acpi_battery_update(battery); |
fdcedbba | 833 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 LT |
834 | result = acpi_battery_add_fs(device); |
835 | if (result) | |
836 | goto end; | |
d7380965 | 837 | #endif |
3b073ec3 | 838 | status = acpi_install_notify_handler(device->handle, |
9fdae727 | 839 | ACPI_ALL_NOTIFY, |
4be44fcd | 840 | acpi_battery_notify, battery); |
1da177e4 | 841 | if (ACPI_FAILURE(status)) { |
b6ce4083 | 842 | ACPI_EXCEPTION((AE_INFO, status, "Installing notify handler")); |
1da177e4 LT |
843 | result = -ENODEV; |
844 | goto end; | |
845 | } | |
1da177e4 | 846 | printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n", |
4be44fcd LB |
847 | ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device), |
848 | device->status.battery_present ? "present" : "absent"); | |
4be44fcd | 849 | end: |
1da177e4 | 850 | if (result) { |
fdcedbba | 851 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 852 | acpi_battery_remove_fs(device); |
d7380965 | 853 | #endif |
1da177e4 LT |
854 | kfree(battery); |
855 | } | |
d550d98d | 856 | return result; |
1da177e4 LT |
857 | } |
858 | ||
4be44fcd | 859 | static int acpi_battery_remove(struct acpi_device *device, int type) |
1da177e4 | 860 | { |
4be44fcd LB |
861 | acpi_status status = 0; |
862 | struct acpi_battery *battery = NULL; | |
1da177e4 | 863 | |
1da177e4 | 864 | if (!device || !acpi_driver_data(device)) |
d550d98d | 865 | return -EINVAL; |
50dd0969 | 866 | battery = acpi_driver_data(device); |
3b073ec3 | 867 | status = acpi_remove_notify_handler(device->handle, |
9fdae727 | 868 | ACPI_ALL_NOTIFY, |
4be44fcd | 869 | acpi_battery_notify); |
fdcedbba | 870 | #ifdef CONFIG_ACPI_PROCFS_POWER |
1da177e4 | 871 | acpi_battery_remove_fs(device); |
d7380965 | 872 | #endif |
97749cd9 | 873 | #ifdef CONFIG_ACPI_SYSFS_POWER |
508df92d | 874 | sysfs_remove_battery(battery); |
97749cd9 | 875 | #endif |
038fdea2 | 876 | mutex_destroy(&battery->lock); |
1da177e4 | 877 | kfree(battery); |
d550d98d | 878 | return 0; |
1da177e4 LT |
879 | } |
880 | ||
34c4415a | 881 | /* this is needed to learn about changes made in suspended state */ |
5d9464a4 | 882 | static int acpi_battery_resume(struct acpi_device *device) |
34c4415a JK |
883 | { |
884 | struct acpi_battery *battery; | |
34c4415a JK |
885 | if (!device) |
886 | return -EINVAL; | |
f1d4661a AS |
887 | battery = acpi_driver_data(device); |
888 | battery->update_time = 0; | |
508df92d | 889 | acpi_battery_update(battery); |
b6ce4083 | 890 | return 0; |
34c4415a JK |
891 | } |
892 | ||
aa650bbd AS |
893 | static struct acpi_driver acpi_battery_driver = { |
894 | .name = "battery", | |
895 | .class = ACPI_BATTERY_CLASS, | |
896 | .ids = battery_device_ids, | |
897 | .ops = { | |
898 | .add = acpi_battery_add, | |
899 | .resume = acpi_battery_resume, | |
900 | .remove = acpi_battery_remove, | |
901 | }, | |
902 | }; | |
903 | ||
4be44fcd | 904 | static int __init acpi_battery_init(void) |
1da177e4 | 905 | { |
4d8316d5 PM |
906 | if (acpi_disabled) |
907 | return -ENODEV; | |
fdcedbba | 908 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 909 | acpi_battery_dir = acpi_lock_battery_dir(); |
1da177e4 | 910 | if (!acpi_battery_dir) |
d550d98d | 911 | return -ENODEV; |
d7380965 | 912 | #endif |
aa650bbd | 913 | if (acpi_bus_register_driver(&acpi_battery_driver) < 0) { |
fdcedbba | 914 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 915 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 916 | #endif |
d550d98d | 917 | return -ENODEV; |
1da177e4 | 918 | } |
d550d98d | 919 | return 0; |
1da177e4 LT |
920 | } |
921 | ||
4be44fcd | 922 | static void __exit acpi_battery_exit(void) |
1da177e4 | 923 | { |
1da177e4 | 924 | acpi_bus_unregister_driver(&acpi_battery_driver); |
fdcedbba | 925 | #ifdef CONFIG_ACPI_PROCFS_POWER |
3f86b832 | 926 | acpi_unlock_battery_dir(acpi_battery_dir); |
d7380965 | 927 | #endif |
1da177e4 LT |
928 | } |
929 | ||
1da177e4 LT |
930 | module_init(acpi_battery_init); |
931 | module_exit(acpi_battery_exit); |