1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 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: " fmt 11 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/platform_device.h> 23 #include <linux/power_supply.h> 24 #include <linux/platform_data/x86/apple.h> 25 #include <acpi/battery.h> 26 27 #include "sbshc.h" 28 29 #define ACPI_SBS_DEVICE_NAME "Smart Battery System" 30 #define ACPI_BATTERY_DIR_NAME "BAT%i" 31 #define ACPI_AC_DIR_NAME "AC0" 32 33 #define ACPI_SBS_NOTIFY_STATUS 0x80 34 #define ACPI_SBS_NOTIFY_INFO 0x81 35 36 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>"); 37 MODULE_DESCRIPTION("Smart Battery System ACPI interface driver"); 38 MODULE_LICENSE("GPL"); 39 40 static unsigned int cache_time = 1000; 41 module_param(cache_time, uint, 0644); 42 MODULE_PARM_DESC(cache_time, "cache time in milliseconds"); 43 44 #define MAX_SBS_BAT 4 45 #define ACPI_SBS_BLOCK_MAX 32 46 47 static const struct acpi_device_id sbs_device_ids[] = { 48 {"ACPI0002", 0}, 49 {"", 0}, 50 }; 51 MODULE_DEVICE_TABLE(acpi, sbs_device_ids); 52 53 struct acpi_battery { 54 struct power_supply *bat; 55 struct power_supply_desc bat_desc; 56 struct acpi_sbs *sbs; 57 unsigned long update_time; 58 char name[8]; 59 char manufacturer_name[ACPI_SBS_BLOCK_MAX]; 60 char device_name[ACPI_SBS_BLOCK_MAX]; 61 char device_chemistry[ACPI_SBS_BLOCK_MAX]; 62 u16 alarm_capacity; 63 u16 full_charge_capacity; 64 u16 design_capacity; 65 u16 design_voltage; 66 u16 serial_number; 67 u16 cycle_count; 68 u16 temp_now; 69 u16 voltage_now; 70 s16 rate_now; 71 s16 rate_avg; 72 u16 capacity_now; 73 u16 state_of_charge; 74 u16 state; 75 u16 mode; 76 u16 spec; 77 u8 id; 78 u8 present:1; 79 }; 80 81 #define to_acpi_battery(x) power_supply_get_drvdata(x) 82 83 struct acpi_sbs { 84 struct power_supply *charger; 85 struct acpi_device *device; 86 struct acpi_smb_hc *hc; 87 struct mutex lock; 88 struct acpi_battery battery[MAX_SBS_BAT]; 89 u8 batteries_supported:4; 90 u8 manager_present:1; 91 u8 charger_present:1; 92 u8 charger_exists:1; 93 }; 94 95 #define to_acpi_sbs(x) power_supply_get_drvdata(x) 96 97 static void acpi_sbs_remove(struct platform_device *pdev); 98 static int acpi_battery_get_state(struct acpi_battery *battery); 99 100 static inline int battery_scale(int log) 101 { 102 int scale = 1; 103 while (log--) 104 scale *= 10; 105 return scale; 106 } 107 108 static inline int acpi_battery_vscale(struct acpi_battery *battery) 109 { 110 return battery_scale((battery->spec & 0x0f00) >> 8); 111 } 112 113 static inline int acpi_battery_ipscale(struct acpi_battery *battery) 114 { 115 return battery_scale((battery->spec & 0xf000) >> 12); 116 } 117 118 static inline int acpi_battery_mode(struct acpi_battery *battery) 119 { 120 return (battery->mode & 0x8000); 121 } 122 123 static inline int acpi_battery_scale(struct acpi_battery *battery) 124 { 125 return (acpi_battery_mode(battery) ? 10 : 1) * 126 acpi_battery_ipscale(battery); 127 } 128 129 static int sbs_get_ac_property(struct power_supply *psy, 130 enum power_supply_property psp, 131 union power_supply_propval *val) 132 { 133 struct acpi_sbs *sbs = to_acpi_sbs(psy); 134 switch (psp) { 135 case POWER_SUPPLY_PROP_ONLINE: 136 val->intval = sbs->charger_present; 137 break; 138 default: 139 return -EINVAL; 140 } 141 return 0; 142 } 143 144 static int acpi_battery_technology(struct acpi_battery *battery) 145 { 146 if (!strcasecmp("NiCd", battery->device_chemistry)) 147 return POWER_SUPPLY_TECHNOLOGY_NiCd; 148 if (!strcasecmp("NiMH", battery->device_chemistry)) 149 return POWER_SUPPLY_TECHNOLOGY_NiMH; 150 if (!strcasecmp("LION", battery->device_chemistry)) 151 return POWER_SUPPLY_TECHNOLOGY_LION; 152 if (!strcasecmp("LiP", battery->device_chemistry)) 153 return POWER_SUPPLY_TECHNOLOGY_LIPO; 154 return POWER_SUPPLY_TECHNOLOGY_UNKNOWN; 155 } 156 157 static int acpi_sbs_battery_get_property(struct power_supply *psy, 158 enum power_supply_property psp, 159 union power_supply_propval *val) 160 { 161 struct acpi_battery *battery = to_acpi_battery(psy); 162 163 if ((!battery->present) && psp != POWER_SUPPLY_PROP_PRESENT) 164 return -ENODEV; 165 166 acpi_battery_get_state(battery); 167 switch (psp) { 168 case POWER_SUPPLY_PROP_STATUS: 169 if (battery->rate_now < 0) 170 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 171 else if (battery->rate_now > 0) 172 val->intval = POWER_SUPPLY_STATUS_CHARGING; 173 else 174 val->intval = POWER_SUPPLY_STATUS_FULL; 175 break; 176 case POWER_SUPPLY_PROP_PRESENT: 177 val->intval = battery->present; 178 break; 179 case POWER_SUPPLY_PROP_TECHNOLOGY: 180 val->intval = acpi_battery_technology(battery); 181 break; 182 case POWER_SUPPLY_PROP_CYCLE_COUNT: 183 val->intval = battery->cycle_count; 184 break; 185 case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: 186 val->intval = battery->design_voltage * 187 acpi_battery_vscale(battery) * 1000; 188 break; 189 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 190 val->intval = battery->voltage_now * 191 acpi_battery_vscale(battery) * 1000; 192 break; 193 case POWER_SUPPLY_PROP_CURRENT_NOW: 194 case POWER_SUPPLY_PROP_POWER_NOW: 195 val->intval = abs(battery->rate_now) * 196 acpi_battery_ipscale(battery) * 1000; 197 val->intval *= (acpi_battery_mode(battery)) ? 198 (battery->voltage_now * 199 acpi_battery_vscale(battery) / 1000) : 1; 200 break; 201 case POWER_SUPPLY_PROP_CURRENT_AVG: 202 case POWER_SUPPLY_PROP_POWER_AVG: 203 val->intval = abs(battery->rate_avg) * 204 acpi_battery_ipscale(battery) * 1000; 205 val->intval *= (acpi_battery_mode(battery)) ? 206 (battery->voltage_now * 207 acpi_battery_vscale(battery) / 1000) : 1; 208 break; 209 case POWER_SUPPLY_PROP_CAPACITY: 210 val->intval = battery->state_of_charge; 211 break; 212 case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN: 213 case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN: 214 val->intval = battery->design_capacity * 215 acpi_battery_scale(battery) * 1000; 216 break; 217 case POWER_SUPPLY_PROP_CHARGE_FULL: 218 case POWER_SUPPLY_PROP_ENERGY_FULL: 219 val->intval = battery->full_charge_capacity * 220 acpi_battery_scale(battery) * 1000; 221 break; 222 case POWER_SUPPLY_PROP_CHARGE_NOW: 223 case POWER_SUPPLY_PROP_ENERGY_NOW: 224 val->intval = battery->capacity_now * 225 acpi_battery_scale(battery) * 1000; 226 break; 227 case POWER_SUPPLY_PROP_TEMP: 228 val->intval = battery->temp_now - 2730; // dK -> dC 229 break; 230 case POWER_SUPPLY_PROP_MODEL_NAME: 231 val->strval = battery->device_name; 232 break; 233 case POWER_SUPPLY_PROP_MANUFACTURER: 234 val->strval = battery->manufacturer_name; 235 break; 236 default: 237 return -EINVAL; 238 } 239 return 0; 240 } 241 242 static const enum power_supply_property sbs_ac_props[] = { 243 POWER_SUPPLY_PROP_ONLINE, 244 }; 245 246 static const enum power_supply_property sbs_charge_battery_props[] = { 247 POWER_SUPPLY_PROP_STATUS, 248 POWER_SUPPLY_PROP_PRESENT, 249 POWER_SUPPLY_PROP_TECHNOLOGY, 250 POWER_SUPPLY_PROP_CYCLE_COUNT, 251 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 252 POWER_SUPPLY_PROP_VOLTAGE_NOW, 253 POWER_SUPPLY_PROP_CURRENT_NOW, 254 POWER_SUPPLY_PROP_CURRENT_AVG, 255 POWER_SUPPLY_PROP_CAPACITY, 256 POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 257 POWER_SUPPLY_PROP_CHARGE_FULL, 258 POWER_SUPPLY_PROP_CHARGE_NOW, 259 POWER_SUPPLY_PROP_TEMP, 260 POWER_SUPPLY_PROP_MODEL_NAME, 261 POWER_SUPPLY_PROP_MANUFACTURER, 262 }; 263 264 static const enum power_supply_property sbs_energy_battery_props[] = { 265 POWER_SUPPLY_PROP_STATUS, 266 POWER_SUPPLY_PROP_PRESENT, 267 POWER_SUPPLY_PROP_TECHNOLOGY, 268 POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 269 POWER_SUPPLY_PROP_VOLTAGE_NOW, 270 POWER_SUPPLY_PROP_CURRENT_NOW, 271 POWER_SUPPLY_PROP_CURRENT_AVG, 272 POWER_SUPPLY_PROP_POWER_NOW, 273 POWER_SUPPLY_PROP_POWER_AVG, 274 POWER_SUPPLY_PROP_CAPACITY, 275 POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 276 POWER_SUPPLY_PROP_ENERGY_FULL, 277 POWER_SUPPLY_PROP_ENERGY_NOW, 278 POWER_SUPPLY_PROP_TEMP, 279 POWER_SUPPLY_PROP_MODEL_NAME, 280 POWER_SUPPLY_PROP_MANUFACTURER, 281 }; 282 283 static const struct power_supply_desc acpi_sbs_charger_desc = { 284 .name = "sbs-charger", 285 .type = POWER_SUPPLY_TYPE_MAINS, 286 .properties = sbs_ac_props, 287 .num_properties = ARRAY_SIZE(sbs_ac_props), 288 .get_property = sbs_get_ac_property, 289 }; 290 291 /* -------------------------------------------------------------------------- 292 Smart Battery System Management 293 -------------------------------------------------------------------------- */ 294 295 struct acpi_battery_reader { 296 u8 command; /* command for battery */ 297 u8 mode; /* word or block? */ 298 size_t offset; /* offset inside struct acpi_sbs_battery */ 299 }; 300 301 static struct acpi_battery_reader info_readers[] = { 302 {0x01, SMBUS_READ_WORD, offsetof(struct acpi_battery, alarm_capacity)}, 303 {0x03, SMBUS_READ_WORD, offsetof(struct acpi_battery, mode)}, 304 {0x10, SMBUS_READ_WORD, offsetof(struct acpi_battery, full_charge_capacity)}, 305 {0x17, SMBUS_READ_WORD, offsetof(struct acpi_battery, cycle_count)}, 306 {0x18, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_capacity)}, 307 {0x19, SMBUS_READ_WORD, offsetof(struct acpi_battery, design_voltage)}, 308 {0x1a, SMBUS_READ_WORD, offsetof(struct acpi_battery, spec)}, 309 {0x1c, SMBUS_READ_WORD, offsetof(struct acpi_battery, serial_number)}, 310 {0x20, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, manufacturer_name)}, 311 {0x21, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_name)}, 312 {0x22, SMBUS_READ_BLOCK, offsetof(struct acpi_battery, device_chemistry)}, 313 }; 314 315 static struct acpi_battery_reader state_readers[] = { 316 {0x08, SMBUS_READ_WORD, offsetof(struct acpi_battery, temp_now)}, 317 {0x09, SMBUS_READ_WORD, offsetof(struct acpi_battery, voltage_now)}, 318 {0x0a, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_now)}, 319 {0x0b, SMBUS_READ_WORD, offsetof(struct acpi_battery, rate_avg)}, 320 {0x0f, SMBUS_READ_WORD, offsetof(struct acpi_battery, capacity_now)}, 321 {0x0e, SMBUS_READ_WORD, offsetof(struct acpi_battery, state_of_charge)}, 322 {0x16, SMBUS_READ_WORD, offsetof(struct acpi_battery, state)}, 323 }; 324 325 static int acpi_manager_get_info(struct acpi_sbs *sbs) 326 { 327 int result = 0; 328 u16 battery_system_info; 329 330 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 331 0x04, (u8 *)&battery_system_info); 332 if (!result) 333 sbs->batteries_supported = battery_system_info & 0x000f; 334 return result; 335 } 336 337 static int acpi_battery_get_info(struct acpi_battery *battery) 338 { 339 int i, result = 0; 340 341 for (i = 0; i < ARRAY_SIZE(info_readers); ++i) { 342 result = acpi_smbus_read(battery->sbs->hc, 343 info_readers[i].mode, 344 ACPI_SBS_BATTERY, 345 info_readers[i].command, 346 (u8 *) battery + 347 info_readers[i].offset); 348 if (result) 349 break; 350 } 351 return result; 352 } 353 354 static int acpi_battery_get_state(struct acpi_battery *battery) 355 { 356 int i, result = 0; 357 358 if (battery->update_time && 359 time_before(jiffies, battery->update_time + 360 msecs_to_jiffies(cache_time))) 361 return 0; 362 for (i = 0; i < ARRAY_SIZE(state_readers); ++i) { 363 result = acpi_smbus_read(battery->sbs->hc, 364 state_readers[i].mode, 365 ACPI_SBS_BATTERY, 366 state_readers[i].command, 367 (u8 *)battery + 368 state_readers[i].offset); 369 if (result) 370 goto end; 371 } 372 end: 373 battery->update_time = jiffies; 374 return result; 375 } 376 377 static int acpi_battery_get_alarm(struct acpi_battery *battery) 378 { 379 return acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 380 ACPI_SBS_BATTERY, 0x01, 381 (u8 *)&battery->alarm_capacity); 382 } 383 384 static int acpi_battery_set_alarm(struct acpi_battery *battery) 385 { 386 struct acpi_sbs *sbs = battery->sbs; 387 u16 value, sel = 1 << (battery->id + 12); 388 389 int ret; 390 391 392 if (sbs->manager_present) { 393 ret = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_MANAGER, 394 0x01, (u8 *)&value); 395 if (ret) 396 goto end; 397 if ((value & 0xf000) != sel) { 398 value &= 0x0fff; 399 value |= sel; 400 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, 401 ACPI_SBS_MANAGER, 402 0x01, (u8 *)&value, 2); 403 if (ret) 404 goto end; 405 } 406 } 407 ret = acpi_smbus_write(sbs->hc, SMBUS_WRITE_WORD, ACPI_SBS_BATTERY, 408 0x01, (u8 *)&battery->alarm_capacity, 2); 409 end: 410 return ret; 411 } 412 413 static int acpi_ac_get_present(struct acpi_sbs *sbs) 414 { 415 int result; 416 u16 status; 417 418 result = acpi_smbus_read(sbs->hc, SMBUS_READ_WORD, ACPI_SBS_CHARGER, 419 0x13, (u8 *) & status); 420 421 if (result) 422 return result; 423 424 /* 425 * The spec requires that bit 4 always be 1. If it's not set, assume 426 * that the implementation doesn't support an SBS charger. 427 * 428 * And on some MacBooks a status of 0xffff is always returned, no 429 * matter whether the charger is plugged in or not, which is also 430 * wrong, so ignore the SBS charger for those too. 431 */ 432 if (!((status >> 4) & 0x1) || status == 0xffff) 433 return -ENODEV; 434 435 sbs->charger_present = (status >> 15) & 0x1; 436 return 0; 437 } 438 439 static ssize_t acpi_battery_alarm_show(struct device *dev, 440 struct device_attribute *attr, 441 char *buf) 442 { 443 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 444 acpi_battery_get_alarm(battery); 445 return sprintf(buf, "%d\n", battery->alarm_capacity * 446 acpi_battery_scale(battery) * 1000); 447 } 448 449 static ssize_t acpi_battery_alarm_store(struct device *dev, 450 struct device_attribute *attr, 451 const char *buf, size_t count) 452 { 453 unsigned long x; 454 struct acpi_battery *battery = to_acpi_battery(dev_get_drvdata(dev)); 455 if (sscanf(buf, "%lu\n", &x) == 1) 456 battery->alarm_capacity = x / 457 (1000 * acpi_battery_scale(battery)); 458 if (battery->present) 459 acpi_battery_set_alarm(battery); 460 return count; 461 } 462 463 static struct device_attribute alarm_attr = { 464 .attr = {.name = "alarm", .mode = 0644}, 465 .show = acpi_battery_alarm_show, 466 .store = acpi_battery_alarm_store, 467 }; 468 469 static struct attribute *acpi_battery_attrs[] = { 470 &alarm_attr.attr, 471 NULL 472 }; 473 ATTRIBUTE_GROUPS(acpi_battery); 474 475 /* -------------------------------------------------------------------------- 476 Driver Interface 477 -------------------------------------------------------------------------- */ 478 static int acpi_battery_read(struct acpi_battery *battery) 479 { 480 int result, saved_present = battery->present; 481 u16 state; 482 483 if (battery->sbs->manager_present) { 484 result = acpi_smbus_read(battery->sbs->hc, SMBUS_READ_WORD, 485 ACPI_SBS_MANAGER, 0x01, (u8 *)&state); 486 if (result) 487 return result; 488 489 battery->present = !!(state & (1 << battery->id)); 490 if (!battery->present) 491 return 0; 492 493 /* Masking necessary for Smart Battery Selectors */ 494 state = 0x0fff; 495 state |= 1 << (battery->id + 12); 496 acpi_smbus_write(battery->sbs->hc, SMBUS_WRITE_WORD, 497 ACPI_SBS_MANAGER, 0x01, (u8 *)&state, 2); 498 } else { 499 if (battery->id == 0) { 500 battery->present = 1; 501 } else { 502 if (!battery->present) 503 return 0; 504 } 505 } 506 507 if (saved_present != battery->present) { 508 battery->update_time = 0; 509 result = acpi_battery_get_info(battery); 510 if (result) { 511 battery->present = 0; 512 return result; 513 } 514 } 515 result = acpi_battery_get_state(battery); 516 if (result) 517 battery->present = 0; 518 return result; 519 } 520 521 /* Smart Battery */ 522 static int acpi_battery_add(struct acpi_sbs *sbs, int id) 523 { 524 struct acpi_battery *battery = &sbs->battery[id]; 525 struct power_supply_config psy_cfg = { 526 .drv_data = battery, 527 .attr_grp = acpi_battery_groups, 528 }; 529 int result; 530 531 battery->id = id; 532 battery->sbs = sbs; 533 result = acpi_battery_read(battery); 534 if (result) 535 return result; 536 537 sprintf(battery->name, ACPI_BATTERY_DIR_NAME, id); 538 battery->bat_desc.name = battery->name; 539 battery->bat_desc.type = POWER_SUPPLY_TYPE_BATTERY; 540 if (!acpi_battery_mode(battery)) { 541 battery->bat_desc.properties = sbs_charge_battery_props; 542 battery->bat_desc.num_properties = 543 ARRAY_SIZE(sbs_charge_battery_props); 544 } else { 545 battery->bat_desc.properties = sbs_energy_battery_props; 546 battery->bat_desc.num_properties = 547 ARRAY_SIZE(sbs_energy_battery_props); 548 } 549 battery->bat_desc.get_property = acpi_sbs_battery_get_property; 550 battery->bat = power_supply_register(&sbs->device->dev, 551 &battery->bat_desc, &psy_cfg); 552 if (IS_ERR(battery->bat)) { 553 result = PTR_ERR(battery->bat); 554 battery->bat = NULL; 555 goto end; 556 } 557 558 end: 559 pr_info("%s [%s]: Battery Slot [%s] (battery %s)\n", 560 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 561 battery->name, battery->present ? "present" : "absent"); 562 return result; 563 } 564 565 static void acpi_battery_remove(struct acpi_sbs *sbs, int id) 566 { 567 struct acpi_battery *battery = &sbs->battery[id]; 568 569 if (battery->bat) 570 power_supply_unregister(battery->bat); 571 } 572 573 static int acpi_charger_add(struct acpi_sbs *sbs) 574 { 575 int result; 576 struct power_supply_config psy_cfg = { .drv_data = sbs, }; 577 578 result = acpi_ac_get_present(sbs); 579 if (result) 580 goto end; 581 582 sbs->charger_exists = 1; 583 sbs->charger = power_supply_register(&sbs->device->dev, 584 &acpi_sbs_charger_desc, &psy_cfg); 585 if (IS_ERR(sbs->charger)) { 586 result = PTR_ERR(sbs->charger); 587 sbs->charger = NULL; 588 } 589 pr_info("%s [%s]: AC Adapter [%s] (%s)\n", 590 ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device), 591 ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line"); 592 end: 593 return result; 594 } 595 596 static void acpi_charger_remove(struct acpi_sbs *sbs) 597 { 598 if (sbs->charger) 599 power_supply_unregister(sbs->charger); 600 } 601 602 static void acpi_sbs_callback(void *context) 603 { 604 int id; 605 struct acpi_sbs *sbs = context; 606 struct acpi_battery *bat; 607 u8 saved_charger_state = sbs->charger_present; 608 u8 saved_battery_state; 609 610 if (sbs->charger_exists) { 611 acpi_ac_get_present(sbs); 612 if (sbs->charger_present != saved_charger_state) 613 power_supply_changed(sbs->charger); 614 } 615 616 if (sbs->manager_present) { 617 for (id = 0; id < MAX_SBS_BAT; ++id) { 618 if (!(sbs->batteries_supported & (1 << id))) 619 continue; 620 bat = &sbs->battery[id]; 621 saved_battery_state = bat->present; 622 acpi_battery_read(bat); 623 if (saved_battery_state == bat->present) 624 continue; 625 power_supply_changed(bat->bat); 626 } 627 } 628 } 629 630 static int acpi_sbs_probe(struct platform_device *pdev) 631 { 632 struct acpi_device *device = ACPI_COMPANION(&pdev->dev); 633 struct acpi_sbs *sbs; 634 int result = 0; 635 int id; 636 637 sbs = kzalloc_obj(struct acpi_sbs); 638 if (!sbs) { 639 result = -ENOMEM; 640 goto end; 641 } 642 643 mutex_init(&sbs->lock); 644 645 platform_set_drvdata(pdev, sbs); 646 647 sbs->hc = dev_get_drvdata(pdev->dev.parent); 648 sbs->device = device; 649 650 result = acpi_charger_add(sbs); 651 if (result && result != -ENODEV) 652 goto end; 653 654 result = 0; 655 656 if (!x86_apple_machine) { 657 result = acpi_manager_get_info(sbs); 658 if (!result) { 659 sbs->manager_present = 1; 660 for (id = 0; id < MAX_SBS_BAT; ++id) 661 if ((sbs->batteries_supported & (1 << id))) 662 acpi_battery_add(sbs, id); 663 } 664 } 665 666 if (!sbs->manager_present) 667 acpi_battery_add(sbs, 0); 668 669 acpi_smbus_register_callback(sbs->hc, acpi_sbs_callback, sbs); 670 end: 671 if (result) 672 acpi_sbs_remove(pdev); 673 return result; 674 } 675 676 static void acpi_sbs_remove(struct platform_device *pdev) 677 { 678 struct acpi_sbs *sbs = platform_get_drvdata(pdev); 679 int id; 680 681 mutex_lock(&sbs->lock); 682 acpi_smbus_unregister_callback(sbs->hc); 683 for (id = 0; id < MAX_SBS_BAT; ++id) 684 acpi_battery_remove(sbs, id); 685 acpi_charger_remove(sbs); 686 mutex_unlock(&sbs->lock); 687 mutex_destroy(&sbs->lock); 688 kfree(sbs); 689 } 690 691 #ifdef CONFIG_PM_SLEEP 692 static int acpi_sbs_resume(struct device *dev) 693 { 694 acpi_sbs_callback(dev_get_drvdata(dev)); 695 return 0; 696 } 697 #else 698 #define acpi_sbs_resume NULL 699 #endif 700 701 static SIMPLE_DEV_PM_OPS(acpi_sbs_pm, NULL, acpi_sbs_resume); 702 703 static struct platform_driver acpi_sbs_driver = { 704 .probe = acpi_sbs_probe, 705 .remove = acpi_sbs_remove, 706 .driver = { 707 .name = "acpi-sbs", 708 .acpi_match_table = sbs_device_ids, 709 .pm = &acpi_sbs_pm, 710 }, 711 }; 712 713 module_platform_driver(acpi_sbs_driver); 714