724 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * sbs.c - ACPI Smart Battery System Driver ($Revision: 2.0 $)4 *5 * Copyright (c) 2007 Alexey Starikovskiy <astarikovskiy@suse.de>6 * Copyright (c) 2005-2007 Vladimir Lebedev <vladimir.p.lebedev@intel.com>7 * Copyright (c) 2005 Rich Townsend <rhdt@bartol.udel.edu>8 */9 10#define pr_fmt(fmt) "ACPI: " fmt11 12#include <linux/init.h>13#include <linux/slab.h>14#include <linux/module.h>15#include <linux/moduleparam.h>16#include <linux/kernel.h>17 18#include <linux/acpi.h>19#include <linux/timer.h>20#include <linux/jiffies.h>21#include <linux/delay.h>22#include <linux/power_supply.h>23#include <linux/platform_data/x86/apple.h>24#include <acpi/battery.h>25 26#include "sbshc.h"27 28#define ACPI_SBS_CLASS "sbs"29#define ACPI_AC_CLASS "ac_adapter"30#define ACPI_SBS_DEVICE_NAME "Smart Battery System"31#define ACPI_BATTERY_DIR_NAME "BAT%i"32#define ACPI_AC_DIR_NAME "AC0"33 34#define ACPI_SBS_NOTIFY_STATUS 0x8035#define ACPI_SBS_NOTIFY_INFO 0x8136 37MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");38MODULE_DESCRIPTION("Smart Battery System ACPI interface driver");39MODULE_LICENSE("GPL");40 41static unsigned int cache_time = 1000;42module_param(cache_time, uint, 0644);43MODULE_PARM_DESC(cache_time, "cache time in milliseconds");44 45#define MAX_SBS_BAT 446#define ACPI_SBS_BLOCK_MAX 3247 48static const struct acpi_device_id sbs_device_ids[] = {49 {"ACPI0002", 0},50 {"", 0},51};52MODULE_DEVICE_TABLE(acpi, sbs_device_ids);53 54struct acpi_battery {55 struct power_supply *bat;56 struct power_supply_desc bat_desc;57 struct acpi_sbs *sbs;58 unsigned long update_time;59 char name[8];60 char manufacturer_name[ACPI_SBS_BLOCK_MAX];61 char device_name[ACPI_SBS_BLOCK_MAX];62 char device_chemistry[ACPI_SBS_BLOCK_MAX];63 u16 alarm_capacity;64 u16 full_charge_capacity;65 u16 design_capacity;66 u16 design_voltage;67 u16 serial_number;68 u16 cycle_count;69 u16 temp_now;70 u16 voltage_now;71 s16 rate_now;72 s16 rate_avg;73 u16 capacity_now;74 u16 state_of_charge;75 u16 state;76 u16 mode;77 u16 spec;78 u8 id;79 u8 present:1;80};81 82#define to_acpi_battery(x) power_supply_get_drvdata(x)83 84struct acpi_sbs {85 struct power_supply *charger;86 struct acpi_device *device;87 struct acpi_smb_hc *hc;88 struct mutex lock;89 struct acpi_battery battery[MAX_SBS_BAT];90 u8 batteries_supported:4;91 u8 manager_present:1;92 u8 charger_present:1;93 u8 charger_exists:1;94};95 96#define to_acpi_sbs(x) power_supply_get_drvdata(x)97 98static void acpi_sbs_remove(struct acpi_device *device);99static int acpi_battery_get_state(struct acpi_battery *battery);100 101static inline int battery_scale(int log)102{103 int scale = 1;104 while (log--)105 scale *= 10;106 return scale;107}108 109static inline int acpi_battery_vscale(struct acpi_battery *battery)110{111 return battery_scale((battery->spec & 0x0f00) >> 8);112}113 114static inline int acpi_battery_ipscale(struct acpi_battery *battery)115{116 return battery_scale((battery->spec & 0xf000) >> 12);117}118 119static inline int acpi_battery_mode(struct acpi_battery *battery)120{121 return (battery->mode & 0x8000);122}123 124static inline int acpi_battery_scale(struct acpi_battery *battery)125{126 return (acpi_battery_mode(battery) ? 10 : 1) *127 acpi_battery_ipscale(battery);128}129 130static int sbs_get_ac_property(struct power_supply *psy,131 enum power_supply_property psp,132 union power_supply_propval *val)133{134 struct acpi_sbs *sbs = to_acpi_sbs(psy);135 switch (psp) {136 case POWER_SUPPLY_PROP_ONLINE:137 val->intval = sbs->charger_present;138 break;139 default:140 return -EINVAL;141 }142 return 0;143}144 145static int acpi_battery_technology(struct acpi_battery *battery)146{147 if (!strcasecmp("NiCd", battery->device_chemistry))148 return POWER_SUPPLY_TECHNOLOGY_NiCd;149 if (!strcasecmp("NiMH", battery->device_chemistry))150 return POWER_SUPPLY_TECHNOLOGY_NiMH;151 if (!strcasecmp("LION", battery->device_chemistry))152 return POWER_SUPPLY_TECHNOLOGY_LION;153 if (!strcasecmp("LiP", battery->device_chemistry))154 return POWER_SUPPLY_TECHNOLOGY_LIPO;155 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN;156}157 158static int acpi_sbs_battery_get_property(struct power_supply *psy,159 enum power_supply_property psp,160 union power_supply_propval *val)161{162 struct acpi_battery *battery = to_acpi_battery(psy);163 164 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT)165 return -ENODEV;166 167 acpi_battery_get_state(battery);168 switch (psp) {169 case POWER_SUPPLY_PROP_STATUS:170 if (battery->rate_now < 0)171 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;172 else if (battery->rate_now > 0)173 val->intval = POWER_SUPPLY_STATUS_CHARGING;174 else175 val->intval = POWER_SUPPLY_STATUS_FULL;176 break;177 case POWER_SUPPLY_PROP_PRESENT:178 val->intval = battery->present;179 break;180 case POWER_SUPPLY_PROP_TECHNOLOGY:181 val->intval = acpi_battery_technology(battery);182 break;183 case POWER_SUPPLY_PROP_CYCLE_COUNT:184 val->intval = battery->cycle_count;185 break;186 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:187 val->intval = battery->design_voltage *188 acpi_battery_vscale(battery) * 1000;189 break;190 case POWER_SUPPLY_PROP_VOLTAGE_NOW:191 val->intval = battery->voltage_now *192 acpi_battery_vscale(battery) * 1000;193 break;194 case POWER_SUPPLY_PROP_CURRENT_NOW:195 case POWER_SUPPLY_PROP_POWER_NOW:196 val->intval = abs(battery->rate_now) *197 acpi_battery_ipscale(battery) * 1000;198 val->intval *= (acpi_battery_mode(battery)) ?199 (battery->voltage_now *200 acpi_battery_vscale(battery) / 1000) : 1;201 break;202 case POWER_SUPPLY_PROP_CURRENT_AVG:203 case POWER_SUPPLY_PROP_POWER_AVG:204 val->intval = abs(battery->rate_avg) *205 acpi_battery_ipscale(battery) * 1000;206 val->intval *= (acpi_battery_mode(battery)) ?207 (battery->voltage_now *208 acpi_battery_vscale(battery) / 1000) : 1;209 break;210 case POWER_SUPPLY_PROP_CAPACITY:211 val->intval = battery->state_of_charge;212 break;213 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:214 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:215 val->intval = battery->design_capacity *216 acpi_battery_scale(battery) * 1000;217 break;218 case POWER_SUPPLY_PROP_CHARGE_FULL:219 case POWER_SUPPLY_PROP_ENERGY_FULL:220 val->intval = battery->full_charge_capacity *221 acpi_battery_scale(battery) * 1000;222 break;223 case POWER_SUPPLY_PROP_CHARGE_NOW:224 case POWER_SUPPLY_PROP_ENERGY_NOW:225 val->intval = battery->capacity_now *226 acpi_battery_scale(battery) * 1000;227 break;228 case POWER_SUPPLY_PROP_TEMP:229 val->intval = battery->temp_now - 2730; // dK -> dC230 break;231 case POWER_SUPPLY_PROP_MODEL_NAME:232 val->strval = battery->device_name;233 break;234 case POWER_SUPPLY_PROP_MANUFACTURER:235 val->strval = battery->manufacturer_name;236 break;237 default:238 return -EINVAL;239 }240 return 0;241}242 243static const enum power_supply_property sbs_ac_props[] = {244 POWER_SUPPLY_PROP_ONLINE,245};246 247static const enum power_supply_property sbs_charge_battery_props[] = {248 POWER_SUPPLY_PROP_STATUS,249 POWER_SUPPLY_PROP_PRESENT,250 POWER_SUPPLY_PROP_TECHNOLOGY,251 POWER_SUPPLY_PROP_CYCLE_COUNT,252 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,253 POWER_SUPPLY_PROP_VOLTAGE_NOW,254 POWER_SUPPLY_PROP_CURRENT_NOW,255 POWER_SUPPLY_PROP_CURRENT_AVG,256 POWER_SUPPLY_PROP_CAPACITY,257 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,258 POWER_SUPPLY_PROP_CHARGE_FULL,259 POWER_SUPPLY_PROP_CHARGE_NOW,260 POWER_SUPPLY_PROP_TEMP,261 POWER_SUPPLY_PROP_MODEL_NAME,262 POWER_SUPPLY_PROP_MANUFACTURER,263};264 265static const enum power_supply_property sbs_energy_battery_props[] = {266 POWER_SUPPLY_PROP_STATUS,267 POWER_SUPPLY_PROP_PRESENT,268 POWER_SUPPLY_PROP_TECHNOLOGY,269 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,270 POWER_SUPPLY_PROP_VOLTAGE_NOW,271 POWER_SUPPLY_PROP_CURRENT_NOW,272 POWER_SUPPLY_PROP_CURRENT_AVG,273 POWER_SUPPLY_PROP_POWER_NOW,274 POWER_SUPPLY_PROP_POWER_AVG,275 POWER_SUPPLY_PROP_CAPACITY,276 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,277 POWER_SUPPLY_PROP_ENERGY_FULL,278 POWER_SUPPLY_PROP_ENERGY_NOW,279 POWER_SUPPLY_PROP_TEMP,280 POWER_SUPPLY_PROP_MODEL_NAME,281 POWER_SUPPLY_PROP_MANUFACTURER,282};283 284static const struct power_supply_desc acpi_sbs_charger_desc = {285 .name = "sbs-charger",286 .type = POWER_SUPPLY_TYPE_MAINS,287 .properties = sbs_ac_props,288 .num_properties = ARRAY_SIZE(sbs_ac_props),289 .get_property = sbs_get_ac_property,290};291 292/* --------------------------------------------------------------------------293 Smart Battery System Management294 -------------------------------------------------------------------------- */295 296struct acpi_battery_reader {297 u8 command; /* command for battery */298 u8 mode; /* word or block? */299 size_t offset; /* offset inside struct acpi_sbs_battery */300};301 302static struct acpi_battery_reader info_readers[] = {303 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)},304 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)},305 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)},306 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)},307 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)},308 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)},309 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)},310 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)},311 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)},312 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)},313 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)},314};315 316static struct acpi_battery_reader state_readers[] = {317 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)},318 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)},319 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)},320 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)},321 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)},322 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)},323 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)},324};325 326static int acpi_manager_get_info(struct acpi_sbs *sbs)327{328 int result = 0;329 u16 battery_system_info;330 331 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,332 0x04, (u8 *)&battery_system_info);333 if (!result)334 sbs->batteries_supported = battery_system_info & 0x000f;335 return result;336}337 338static int acpi_battery_get_info(struct acpi_battery *battery)339{340 int i, result = 0;341 342 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) {343 result = acpi_smbus_read(battery->sbs->hc,344 info_readers[i].mode,345 ACPI_SBS_BATTERY,346 info_readers[i].command,347 (u8 *) battery +348 info_readers[i].offset);349 if (result)350 break;351 }352 return result;353}354 355static int acpi_battery_get_state(struct acpi_battery *battery)356{357 int i, result = 0;358 359 if (battery->update_time &&360 time_before(jiffies, battery->update_time +361 msecs_to_jiffies(cache_time)))362 return 0;363 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) {364 result = acpi_smbus_read(battery->sbs->hc,365 state_readers[i].mode,366 ACPI_SBS_BATTERY,367 state_readers[i].command,368 (u8 *)battery +369 state_readers[i].offset);370 if (result)371 goto end;372 }373 end:374 battery->update_time = jiffies;375 return result;376}377 378static int acpi_battery_get_alarm(struct acpi_battery *battery)379{380 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,381 ACPI_SBS_BATTERY, 0x01,382 (u8 *)&battery->alarm_capacity);383}384 385static int acpi_battery_set_alarm(struct acpi_battery *battery)386{387 struct acpi_sbs *sbs = battery->sbs;388 u16 value, sel = 1 << (battery->id + 12);389 390 int ret;391 392 393 if (sbs->manager_present) {394 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER,395 0x01, (u8 *)&value);396 if (ret)397 goto end;398 if ((value & 0xf000) != sel) {399 value &= 0x0fff;400 value |= sel;401 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD,402 ACPI_SBS_MANAGER,403 0x01, (u8 *)&value, 2);404 if (ret)405 goto end;406 }407 }408 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY,409 0x01, (u8 *)&battery->alarm_capacity, 2);410 end:411 return ret;412}413 414static int acpi_ac_get_present(struct acpi_sbs *sbs)415{416 int result;417 u16 status;418 419 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER,420 0x13, (u8 *) & status);421 422 if (result)423 return result;424 425 /*426 * The spec requires that bit 4 always be 1. If it's not set, assume427 * that the implementation doesn't support an SBS charger.428 *429 * And on some MacBooks a status of 0xffff is always returned, no430 * matter whether the charger is plugged in or not, which is also431 * wrong, so ignore the SBS charger for those too.432 */433 if (!((status >> 4) & 0x1) || status == 0xffff)434 return -ENODEV;435 436 sbs->charger_present = (status >> 15) & 0x1;437 return 0;438}439 440static ssize_t acpi_battery_alarm_show(struct device *dev,441 struct device_attribute *attr,442 char *buf)443{444 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));445 acpi_battery_get_alarm(battery);446 return sprintf(buf, "%d\n", battery->alarm_capacity *447 acpi_battery_scale(battery) * 1000);448}449 450static ssize_t acpi_battery_alarm_store(struct device *dev,451 struct device_attribute *attr,452 const char *buf, size_t count)453{454 unsigned long x;455 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev));456 if (sscanf(buf, "%lu\n", &x) == 1)457 battery->alarm_capacity = x /458 (1000 * acpi_battery_scale(battery));459 if (battery->present)460 acpi_battery_set_alarm(battery);461 return count;462}463 464static struct device_attribute alarm_attr = {465 .attr = {.name = "alarm", .mode = 0644},466 .show = acpi_battery_alarm_show,467 .store = acpi_battery_alarm_store,468};469 470static struct attribute *acpi_battery_attrs[] = {471 &alarm_attr.attr,472 NULL473};474ATTRIBUTE_GROUPS(acpi_battery);475 476/* --------------------------------------------------------------------------477 Driver Interface478 -------------------------------------------------------------------------- */479static int acpi_battery_read(struct acpi_battery *battery)480{481 int result, saved_present = battery->present;482 u16 state;483 484 if (battery->sbs->manager_present) {485 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD,486 ACPI_SBS_MANAGER, 0x01, (u8 *)&state);487 if (result)488 return result;489 490 battery->present = state & (1 << battery->id);491 if (!battery->present)492 return 0;493 494 /* Masking necessary for Smart Battery Selectors */495 state = 0x0fff;496 state |= 1 << (battery->id + 12);497 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD,498 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2);499 } else {500 if (battery->id == 0) {501 battery->present = 1;502 } else {503 if (!battery->present)504 return 0;505 }506 }507 508 if (saved_present != battery->present) {509 battery->update_time = 0;510 result = acpi_battery_get_info(battery);511 if (result) {512 battery->present = 0;513 return result;514 }515 }516 result = acpi_battery_get_state(battery);517 if (result)518 battery->present = 0;519 return result;520}521 522/* Smart Battery */523static int acpi_battery_add(struct acpi_sbs *sbs, int id)524{525 struct acpi_battery *battery = &sbs->battery[id];526 struct power_supply_config psy_cfg = {527 .drv_data = battery,528 .attr_grp = acpi_battery_groups,529 };530 int result;531 532 battery->id = id;533 battery->sbs = sbs;534 result = acpi_battery_read(battery);535 if (result)536 return result;537 538 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id);539 battery->bat_desc.name = battery->name;540 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY;541 if (!acpi_battery_mode(battery)) {542 battery->bat_desc.properties = sbs_charge_battery_props;543 battery->bat_desc.num_properties =544 ARRAY_SIZE(sbs_charge_battery_props);545 } else {546 battery->bat_desc.properties = sbs_energy_battery_props;547 battery->bat_desc.num_properties =548 ARRAY_SIZE(sbs_energy_battery_props);549 }550 battery->bat_desc.get_property = acpi_sbs_battery_get_property;551 battery->bat = power_supply_register(&sbs->device->dev,552 &battery->bat_desc, &psy_cfg);553 if (IS_ERR(battery->bat)) {554 result = PTR_ERR(battery->bat);555 battery->bat = NULL;556 goto end;557 }558 559 end:560 pr_info("%s [%s]: Battery Slot [%s] (battery %s)\n",561 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),562 battery->name, battery->present ? "present" : "absent");563 return result;564}565 566static void acpi_battery_remove(struct acpi_sbs *sbs, int id)567{568 struct acpi_battery *battery = &sbs->battery[id];569 570 if (battery->bat)571 power_supply_unregister(battery->bat);572}573 574static int acpi_charger_add(struct acpi_sbs *sbs)575{576 int result;577 struct power_supply_config psy_cfg = { .drv_data = sbs, };578 579 result = acpi_ac_get_present(sbs);580 if (result)581 goto end;582 583 sbs->charger_exists = 1;584 sbs->charger = power_supply_register(&sbs->device->dev,585 &acpi_sbs_charger_desc, &psy_cfg);586 if (IS_ERR(sbs->charger)) {587 result = PTR_ERR(sbs->charger);588 sbs->charger = NULL;589 }590 pr_info("%s [%s]: AC Adapter [%s] (%s)\n",591 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),592 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");593end:594 return result;595}596 597static void acpi_charger_remove(struct acpi_sbs *sbs)598{599 if (sbs->charger)600 power_supply_unregister(sbs->charger);601}602 603static void acpi_sbs_callback(void *context)604{605 int id;606 struct acpi_sbs *sbs = context;607 struct acpi_battery *bat;608 u8 saved_charger_state = sbs->charger_present;609 u8 saved_battery_state;610 611 if (sbs->charger_exists) {612 acpi_ac_get_present(sbs);613 if (sbs->charger_present != saved_charger_state)614 power_supply_changed(sbs->charger);615 }616 617 if (sbs->manager_present) {618 for (id = 0; id < MAX_SBS_BAT; ++id) {619 if (!(sbs->batteries_supported & (1 << id)))620 continue;621 bat = &sbs->battery[id];622 saved_battery_state = bat->present;623 acpi_battery_read(bat);624 if (saved_battery_state == bat->present)625 continue;626 power_supply_changed(bat->bat);627 }628 }629}630 631static int acpi_sbs_add(struct acpi_device *device)632{633 struct acpi_sbs *sbs;634 int result = 0;635 int id;636 637 sbs = kzalloc(sizeof(struct acpi_sbs), GFP_KERNEL);638 if (!sbs) {639 result = -ENOMEM;640 goto end;641 }642 643 mutex_init(&sbs->lock);644 645 sbs->hc = acpi_driver_data(acpi_dev_parent(device));646 sbs->device = device;647 strcpy(acpi_device_name(device), ACPI_SBS_DEVICE_NAME);648 strcpy(acpi_device_class(device), ACPI_SBS_CLASS);649 device->driver_data = sbs;650 651 result = acpi_charger_add(sbs);652 if (result && result != -ENODEV)653 goto end;654 655 result = 0;656 657 if (!x86_apple_machine) {658 result = acpi_manager_get_info(sbs);659 if (!result) {660 sbs->manager_present = 1;661 for (id = 0; id < MAX_SBS_BAT; ++id)662 if ((sbs->batteries_supported & (1 << id)))663 acpi_battery_add(sbs, id);664 }665 }666 667 if (!sbs->manager_present)668 acpi_battery_add(sbs, 0);669 670 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs);671end:672 if (result)673 acpi_sbs_remove(device);674 return result;675}676 677static void acpi_sbs_remove(struct acpi_device *device)678{679 struct acpi_sbs *sbs;680 int id;681 682 if (!device)683 return;684 sbs = acpi_driver_data(device);685 if (!sbs)686 return;687 mutex_lock(&sbs->lock);688 acpi_smbus_unregister_callback(sbs->hc);689 for (id = 0; id < MAX_SBS_BAT; ++id)690 acpi_battery_remove(sbs, id);691 acpi_charger_remove(sbs);692 mutex_unlock(&sbs->lock);693 mutex_destroy(&sbs->lock);694 kfree(sbs);695}696 697#ifdef CONFIG_PM_SLEEP698static int acpi_sbs_resume(struct device *dev)699{700 struct acpi_sbs *sbs;701 if (!dev)702 return -EINVAL;703 sbs = to_acpi_device(dev)->driver_data;704 acpi_sbs_callback(sbs);705 return 0;706}707#else708#define acpi_sbs_resume NULL709#endif710 711static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume);712 713static struct acpi_driver acpi_sbs_driver = {714 .name = "sbs",715 .class = ACPI_SBS_CLASS,716 .ids = sbs_device_ids,717 .ops = {718 .add = acpi_sbs_add,719 .remove = acpi_sbs_remove,720 },721 .drv.pm = &acpi_sbs_pm,722};723module_acpi_driver(acpi_sbs_driver);724