Documentation/ABI/testing/sysfs-class-power

   1 ===== General Properties =====
   2
   3 What:           /sys/class/power_supply/<supply_name>/manufacturer
   4 Date:           May 2007
   5 Contact:        linux-pm@vger.kernel.org
   6 Description:
   7                 Reports the name of the device manufacturer.
   8
   9                 Access: Read
  10                 Valid values: Represented as string
  11
  12 What:           /sys/class/power_supply/<supply_name>/model_name
  13 Date:           May 2007
  14 Contact:        linux-pm@vger.kernel.org
  15 Description:
  16                 Reports the name of the device model.
  17
  18                 Access: Read
  19                 Valid values: Represented as string
  20
  21 What:           /sys/class/power_supply/<supply_name>/serial_number
  22 Date:           January 2008
  23 Contact:        linux-pm@vger.kernel.org
  24 Description:
  25                 Reports the serial number of the device.
  26
  27                 Access: Read
  28                 Valid values: Represented as string
  29
  30 What:           /sys/class/power_supply/<supply_name>/type
  31 Date:           May 2010
  32 Contact:        linux-pm@vger.kernel.org
  33 Description:
  34                 Describes the main type of the supply.
  35
  36                 Access: Read
  37                 Valid values: "Battery", "UPS", "Mains", "USB"
  38
  39 ===== Battery Properties =====
  40
  41 What:           /sys/class/power_supply/<supply_name>/capacity
  42 Date:           May 2007
  43 Contact:        linux-pm@vger.kernel.org
  44 Description:
  45                 Fine grain representation of battery capacity.
  46                 Access: Read
  47                 Valid values: 0 - 100 (percent)
  48
  49 What:           /sys/class/power_supply/<supply_name>/capacity_alert_max
  50 Date:           July 2012
  51 Contact:        linux-pm@vger.kernel.org
  52 Description:
  53                 Maximum battery capacity trip-wire value where the supply will
  54                 notify user-space of the event. This is normally used for the
  55                 battery discharging scenario where user-space needs to know the
  56                 battery has dropped to an upper level so it can take
  57                 appropriate action (e.g. warning user that battery level is
  58                 low).
  59
  60                 Access: Read, Write
  61                 Valid values: 0 - 100 (percent)
  62
  63 What:           /sys/class/power_supply/<supply_name>/capacity_alert_min
  64 Date:           July 2012
  65 Contact:        linux-pm@vger.kernel.org
  66 Description:
  67                 Minimum battery capacity trip-wire value where the supply will
  68                 notify user-space of the event. This is normally used for the
  69                 battery discharging scenario where user-space needs to know the
  70                 battery has dropped to a lower level so it can take
  71                 appropriate action (e.g. warning user that battery level is
  72                 critically low).
  73
  74                 Access: Read, Write
  75                 Valid values: 0 - 100 (percent)
  76
  77 What:           /sys/class/power_supply/<supply_name>/capacity_level
  78 Date:           June 2009
  79 Contact:        linux-pm@vger.kernel.org
  80 Description:
  81                 Coarse representation of battery capacity.
  82
  83                 Access: Read
  84                 Valid values: "Unknown", "Critical", "Low", "Normal", "High",
  85                               "Full"
  86
  87 What:           /sys/class/power_supply/<supply_name>/current_avg
  88 Date:           May 2007
  89 Contact:        linux-pm@vger.kernel.org
  90 Description:
  91                 Reports an average IBAT current reading for the battery, over a
  92                 fixed period. Normally devices will provide a fixed interval in
  93                 which they average readings to smooth out the reported value.
  94
  95                 Access: Read
  96                 Valid values: Represented in microamps
  97
  98 What:           /sys/class/power_supply/<supply_name>/current_max
  99 Date:           October 2010
 100 Contact:        linux-pm@vger.kernel.org
 101 Description:
 102                 Reports the maximum IBAT current allowed into the battery.
 103
 104                 Access: Read
 105                 Valid values: Represented in microamps
 106
 107 What:           /sys/class/power_supply/<supply_name>/current_now
 108 Date:           May 2007
 109 Contact:        linux-pm@vger.kernel.org
 110 Description:
 111                 Reports an instant, single IBAT current reading for the battery.
 112                 This value is not averaged/smoothed.
 113
 114                 Access: Read
 115                 Valid values: Represented in microamps
 116
 117 What:           /sys/class/power_supply/<supply_name>/charge_control_limit
 118 Date:           Oct 2012
 119 Contact:        linux-pm@vger.kernel.org
 120 Description:
 121                 Maximum allowable charging current. Used for charge rate
 122                 throttling for thermal cooling or improving battery health.
 123
 124                 Access: Read, Write
 125                 Valid values: Represented in microamps
 126
 127 What:           /sys/class/power_supply/<supply_name>/charge_control_limit_max
 128 Date:           Oct 2012
 129 Contact:        linux-pm@vger.kernel.org
 130 Description:
 131                 Maximum legal value for the charge_control_limit property.
 132
 133                 Access: Read
 134                 Valid values: Represented in microamps
 135
 136 What:           /sys/class/power_supply/<supply_name>/charge_control_start_threshold
 137 Date:           April 2019
 138 Contact:        linux-pm@vger.kernel.org
 139 Description:
 140                 Represents a battery percentage level, below which charging will
 141                 begin.
 142
 143                 Access: Read, Write
 144                 Valid values: 0 - 100 (percent)
 145
 146 What:           /sys/class/power_supply/<supply_name>/charge_control_end_threshold
 147 Date:           April 2019
 148 Contact:        linux-pm@vger.kernel.org
 149 Description:
 150                 Represents a battery percentage level, above which charging will
 151                 stop.
 152
 153                 Access: Read, Write
 154                 Valid values: 0 - 100 (percent)
 155
 156 What:           /sys/class/power_supply/<supply_name>/charge_type
 157 Date:           July 2009
 158 Contact:        linux-pm@vger.kernel.org
 159 Description:
 160                 Represents the type of charging currently being applied to the
 161                 battery. "Trickle", "Fast", and "Standard" all mean different
 162                 charging speeds. "Adaptive" means that the charger uses some
 163                 algorithm to adjust the charge rate dynamically, without
 164                 any user configuration required. "Custom" means that the charger
 165                 uses the charge_control_* properties as configuration for some
 166                 different algorithm.
 167
 168                 Access: Read, Write
 169                 Valid values: "Unknown", "N/A", "Trickle", "Fast", "Standard",
 170                               "Adaptive", "Custom"
 171
 172 What:           /sys/class/power_supply/<supply_name>/charge_term_current
 173 Date:           July 2014
 174 Contact:        linux-pm@vger.kernel.org
 175 Description:
 176                 Reports the charging current value which is used to determine
 177                 when the battery is considered full and charging should end.
 178
 179                 Access: Read
 180                 Valid values: Represented in microamps
 181
 182 What:           /sys/class/power_supply/<supply_name>/health
 183 Date:           May 2007
 184 Contact:        linux-pm@vger.kernel.org
 185 Description:
 186                 Reports the health of the battery or battery side of charger
 187                 functionality.
 188
 189                 Access: Read
 190                 Valid values: "Unknown", "Good", "Overheat", "Dead",
 191                               "Over voltage", "Unspecified failure", "Cold",
 192                               "Watchdog timer expire", "Safety timer expire"
 193
 194 What:           /sys/class/power_supply/<supply_name>/precharge_current
 195 Date:           June 2017
 196 Contact:        linux-pm@vger.kernel.org
 197 Description:
 198                 Reports the charging current applied during pre-charging phase
 199                 for a battery charge cycle.
 200
 201                 Access: Read
 202                 Valid values: Represented in microamps
 203
 204 What:           /sys/class/power_supply/<supply_name>/present
 205 Date:           May 2007
 206 Contact:        linux-pm@vger.kernel.org
 207 Description:
 208                 Reports whether a battery is present or not in the system.
 209
 210                 Access: Read
 211                 Valid values:
 212                         0: Absent
 213                         1: Present
 214
 215 What:           /sys/class/power_supply/<supply_name>/status
 216 Date:           May 2007
 217 Contact:        linux-pm@vger.kernel.org
 218 Description:
 219                 Represents the charging status of the battery. Normally this
 220                 is read-only reporting although for some supplies this can be
 221                 used to enable/disable charging to the battery.
 222
 223                 Access: Read, Write
 224                 Valid values: "Unknown", "Charging", "Discharging",
 225                               "Not charging", "Full"
 226
 227 What:           /sys/class/power_supply/<supply_name>/technology
 228 Date:           May 2007
 229 Contact:        linux-pm@vger.kernel.org
 230 Description:
 231                 Describes the battery technology supported by the supply.
 232
 233                 Access: Read
 234                 Valid values: "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
 235                               "NiCd", "LiMn"
 236
 237 What:           /sys/class/power_supply/<supply_name>/temp
 238 Date:           May 2007
 239 Contact:        linux-pm@vger.kernel.org
 240 Description:
 241                 Reports the current TBAT battery temperature reading.
 242
 243                 Access: Read
 244                 Valid values: Represented in 1/10 Degrees Celsius
 245
 246 What:           /sys/class/power_supply/<supply_name>/temp_alert_max
 247 Date:           July 2012
 248 Contact:        linux-pm@vger.kernel.org
 249 Description:
 250                 Maximum TBAT temperature trip-wire value where the supply will
 251                 notify user-space of the event. This is normally used for the
 252                 battery charging scenario where user-space needs to know the
 253                 battery temperature has crossed an upper threshold so it can
 254                 take appropriate action (e.g. warning user that battery level is
 255                 critically high, and charging has stopped).
 256
 257                 Access: Read
 258                 Valid values: Represented in 1/10 Degrees Celsius
 259
 260 What:           /sys/class/power_supply/<supply_name>/temp_alert_min
 261 Date:           July 2012
 262 Contact:        linux-pm@vger.kernel.org
 263 Description:
 264                 Minimum TBAT temperature trip-wire value where the supply will
 265                 notify user-space of the event. This is normally used for the
 266                 battery charging scenario where user-space needs to know the
 267                 battery temperature has crossed a lower threshold so it can take
 268                 appropriate action (e.g. warning user that battery level is
 269                 high, and charging current has been reduced accordingly to
 270                 remedy the situation).
 271
 272                 Access: Read
 273                 Valid values: Represented in 1/10 Degrees Celsius
 274
 275 What:           /sys/class/power_supply/<supply_name>/temp_max
 276 Date:           July 2014
 277 Contact:        linux-pm@vger.kernel.org
 278 Description:
 279                 Reports the maximum allowed TBAT battery temperature for
 280                 charging.
 281
 282                 Access: Read
 283                 Valid values: Represented in 1/10 Degrees Celsius
 284
 285 What:           /sys/class/power_supply/<supply_name>/temp_min
 286 Date:           July 2014
 287 Contact:        linux-pm@vger.kernel.org
 288 Description:
 289                 Reports the minimum allowed TBAT battery temperature for
 290                 charging.
 291
 292                 Access: Read
 293                 Valid values: Represented in 1/10 Degrees Celsius
 294
 295 What:           /sys/class/power_supply/<supply_name>/voltage_avg,
 296 Date:           May 2007
 297 Contact:        linux-pm@vger.kernel.org
 298 Description:
 299                 Reports an average VBAT voltage reading for the battery, over a
 300                 fixed period. Normally devices will provide a fixed interval in
 301                 which they average readings to smooth out the reported value.
 302
 303                 Access: Read
 304                 Valid values: Represented in microvolts
 305
 306 What:           /sys/class/power_supply/<supply_name>/voltage_max,
 307 Date:           January 2008
 308 Contact:        linux-pm@vger.kernel.org
 309 Description:
 310                 Reports the maximum safe VBAT voltage permitted for the battery,
 311                 during charging.
 312
 313                 Access: Read
 314                 Valid values: Represented in microvolts
 315
 316 What:           /sys/class/power_supply/<supply_name>/voltage_min,
 317 Date:           January 2008
 318 Contact:        linux-pm@vger.kernel.org
 319 Description:
 320                 Reports the minimum safe VBAT voltage permitted for the battery,
 321                 during discharging.
 322
 323                 Access: Read
 324                 Valid values: Represented in microvolts
 325
 326 What:           /sys/class/power_supply/<supply_name>/voltage_now,
 327 Date:           May 2007
 328 Contact:        linux-pm@vger.kernel.org
 329 Description:
 330                 Reports an instant, single VBAT voltage reading for the battery.
 331                 This value is not averaged/smoothed.
 332
 333                 Access: Read
 334                 Valid values: Represented in microvolts
 335
 336 ===== USB Properties =====
 337
 338 What:           /sys/class/power_supply/<supply_name>/current_avg
 339 Date:           May 2007
 340 Contact:        linux-pm@vger.kernel.org
 341 Description:
 342                 Reports an average IBUS current reading over a fixed period.
 343                 Normally devices will provide a fixed interval in which they
 344                 average readings to smooth out the reported value.
 345
 346                 Access: Read
 347                 Valid values: Represented in microamps
 348
 349
 350 What:           /sys/class/power_supply/<supply_name>/current_max
 351 Date:           October 2010
 352 Contact:        linux-pm@vger.kernel.org
 353 Description:
 354                 Reports the maximum IBUS current the supply can support.
 355
 356                 Access: Read
 357                 Valid values: Represented in microamps
 358
 359 What:           /sys/class/power_supply/<supply_name>/current_now
 360 Date:           May 2007
 361 Contact:        linux-pm@vger.kernel.org
 362 Description:
 363                 Reports the IBUS current supplied now. This value is generally
 364                 read-only reporting, unless the 'online' state of the supply
 365                 is set to be programmable, in which case this value can be set
 366                 within the reported min/max range.
 367
 368                 Access: Read, Write
 369                 Valid values: Represented in microamps
 370
 371 What:           /sys/class/power_supply/<supply_name>/input_current_limit
 372 Date:           July 2014
 373 Contact:        linux-pm@vger.kernel.org
 374 Description:
 375                 Details the incoming IBUS current limit currently set in the
 376                 supply. Normally this is configured based on the type of
 377                 connection made (e.g. A configured SDP should output a maximum
 378                 of 500mA so the input current limit is set to the same value).
 379                 Use preferably input_power_limit, and for problems that can be
 380                 solved using power limit use input_current_limit.
 381
 382                 Access: Read, Write
 383                 Valid values: Represented in microamps
 384
 385 What:           /sys/class/power_supply/<supply_name>/input_voltage_limit
 386 Date:           May 2019
 387 Contact:        linux-pm@vger.kernel.org
 388 Description:
 389                 This entry configures the incoming VBUS voltage limit currently
 390                 set in the supply. Normally this is configured based on
 391                 system-level knowledge or user input (e.g. This is part of the
 392                 Pixel C's thermal management strategy to effectively limit the
 393                 input power to 5V when the screen is on to meet Google's skin
 394                 temperature targets). Note that this feature should not be
 395                 used for safety critical things.
 396                 Use preferably input_power_limit, and for problems that can be
 397                 solved using power limit use input_voltage_limit.
 398
 399                 Access: Read, Write
 400                 Valid values: Represented in microvolts
 401
 402 What:           /sys/class/power_supply/<supply_name>/input_power_limit
 403 Date:           May 2019
 404 Contact:        linux-pm@vger.kernel.org
 405 Description:
 406                 This entry configures the incoming power limit currently set
 407                 in the supply. Normally this is configured based on
 408                 system-level knowledge or user input. Use preferably this
 409                 feature to limit the incoming power and use current/voltage
 410                 limit only for problems that can be solved using power limit.
 411
 412                 Access: Read, Write
 413                 Valid values: Represented in microwatts
 414
 415 What:           /sys/class/power_supply/<supply_name>/online,
 416 Date:           May 2007
 417 Contact:        linux-pm@vger.kernel.org
 418 Description:
 419                 Indicates if VBUS is present for the supply. When the supply is
 420                 online, and the supply allows it, then it's possible to switch
 421                 between online states (e.g. Fixed -> Programmable for a PD_PPS
 422                 USB supply so voltage and current can be controlled).
 423
 424                 Access: Read, Write
 425                 Valid values:
 426                         0: Offline
 427                         1: Online Fixed - Fixed Voltage Supply
 428                         2: Online Programmable - Programmable Voltage Supply
 429
 430 What:           /sys/class/power_supply/<supply_name>/temp
 431 Date:           May 2007
 432 Contact:        linux-pm@vger.kernel.org
 433 Description:
 434                 Reports the current supply temperature reading. This would
 435                 normally be the internal temperature of the device itself (e.g
 436                 TJUNC temperature of an IC)
 437
 438                 Access: Read
 439                 Valid values: Represented in 1/10 Degrees Celsius
 440
 441 What:           /sys/class/power_supply/<supply_name>/temp_alert_max
 442 Date:           July 2012
 443 Contact:        linux-pm@vger.kernel.org
 444 Description:
 445                 Maximum supply temperature trip-wire value where the supply will
 446                 notify user-space of the event. This is normally used for the
 447                 charging scenario where user-space needs to know the supply
 448                 temperature has crossed an upper threshold so it can take
 449                 appropriate action (e.g. warning user that the supply
 450                 temperature is critically high, and charging has stopped to
 451                 remedy the situation).
 452
 453                 Access: Read
 454                 Valid values: Represented in 1/10 Degrees Celsius
 455
 456 What:           /sys/class/power_supply/<supply_name>/temp_alert_min
 457 Date:           July 2012
 458 Contact:        linux-pm@vger.kernel.org
 459 Description:
 460                 Minimum supply temperature trip-wire value where the supply will
 461                 notify user-space of the event. This is normally used for the
 462                 charging scenario where user-space needs to know the supply
 463                 temperature has crossed a lower threshold so it can take
 464                 appropriate action (e.g. warning user that the supply
 465                 temperature is high, and charging current has been reduced
 466                 accordingly to remedy the situation).
 467
 468                 Access: Read
 469                 Valid values: Represented in 1/10 Degrees Celsius
 470
 471 What:           /sys/class/power_supply/<supply_name>/temp_max
 472 Date:           July 2014
 473 Contact:        linux-pm@vger.kernel.org
 474 Description:
 475                 Reports the maximum allowed supply temperature for operation.
 476
 477                 Access: Read
 478                 Valid values: Represented in 1/10 Degrees Celsius
 479
 480 What:           /sys/class/power_supply/<supply_name>/temp_min
 481 Date:           July 2014
 482 Contact:        linux-pm@vger.kernel.org
 483 Description:
 484                 Reports the mainimum allowed supply temperature for operation.
 485
 486                 Access: Read
 487                 Valid values: Represented in 1/10 Degrees Celsius
 488
 489 What:           /sys/class/power_supply/<supply_name>/usb_type
 490 Date:           March 2018
 491 Contact:        linux-pm@vger.kernel.org
 492 Description:
 493                 Reports what type of USB connection is currently active for
 494                 the supply, for example it can show if USB-PD capable source
 495                 is attached.
 496
 497                 Access: Read-Only
 498                 Valid values: "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
 499                               "PD_DRP", "PD_PPS", "BrickID"
 500
 501 What:           /sys/class/power_supply/<supply_name>/voltage_max
 502 Date:           January 2008
 503 Contact:        linux-pm@vger.kernel.org
 504 Description:
 505                 Reports the maximum VBUS voltage the supply can support.
 506
 507                 Access: Read
 508                 Valid values: Represented in microvolts
 509
 510 What:           /sys/class/power_supply/<supply_name>/voltage_min
 511 Date:           January 2008
 512 Contact:        linux-pm@vger.kernel.org
 513 Description:
 514                 Reports the minimum VBUS voltage the supply can support.
 515
 516                 Access: Read
 517                 Valid values: Represented in microvolts
 518
 519 What:           /sys/class/power_supply/<supply_name>/voltage_now
 520 Date:           May 2007
 521 Contact:        linux-pm@vger.kernel.org
 522 Description:
 523                 Reports the VBUS voltage supplied now. This value is generally
 524                 read-only reporting, unless the 'online' state of the supply
 525                 is set to be programmable, in which case this value can be set
 526                 within the reported min/max range.
 527
 528                 Access: Read, Write
 529                 Valid values: Represented in microvolts
 530
 531 ===== Device Specific Properties =====
 532
 533 What:           /sys/class/power/ds2760-battery.*/charge_now
 534 Date:           May 2010
 535 KernelVersion:  2.6.35
 536 Contact:        Daniel Mack <daniel@caiaq.de>
 537 Description:
 538                 This file is writeable and can be used to set the current
 539                 coloumb counter value inside the battery monitor chip. This
 540                 is needed for unavoidable corrections of aging batteries.
 541                 A userspace daemon can monitor the battery charging logic
 542                 and once the counter drops out of considerable bounds, take
 543                 appropriate action.
 544
 545 What:           /sys/class/power/ds2760-battery.*/charge_full
 546 Date:           May 2010
 547 KernelVersion:  2.6.35
 548 Contact:        Daniel Mack <daniel@caiaq.de>
 549 Description:
 550                 This file is writeable and can be used to set the assumed
 551                 battery 'full level'. As batteries age, this value has to be
 552                 amended over time.
 553
 554 What:           /sys/class/power_supply/max14577-charger/device/fast_charge_timer
 555 Date:           October 2014
 556 KernelVersion:  3.18.0
 557 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 558 Description:
 559                 This entry shows and sets the maximum time the max14577
 560                 charger operates in fast-charge mode. When the timer expires
 561                 the device will terminate fast-charge mode (charging current
 562                 will drop to 0 A) and will trigger interrupt.
 563
 564                 Valid values:
 565                 - 5, 6 or 7 (hours),
 566                 - 0: disabled.
 567
 568 What:           /sys/class/power_supply/max77693-charger/device/fast_charge_timer
 569 Date:           January 2015
 570 KernelVersion:  3.19.0
 571 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 572 Description:
 573                 This entry shows and sets the maximum time the max77693
 574                 charger operates in fast-charge mode. When the timer expires
 575                 the device will terminate fast-charge mode (charging current
 576                 will drop to 0 A) and will trigger interrupt.
 577
 578                 Valid values:
 579                 - 4 - 16 (hours), step by 2 (rounded down)
 580                 - 0: disabled.
 581
 582 What:           /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
 583 Date:           January 2015
 584 KernelVersion:  3.19.0
 585 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 586 Description:
 587                 This entry shows and sets the charging current threshold for
 588                 entering top-off charging mode. When charging current in fast
 589                 charge mode drops below this value, the charger will trigger
 590                 interrupt and start top-off charging mode.
 591
 592                 Valid values:
 593                 - 100000 - 200000 (microamps), step by 25000 (rounded down)
 594                 - 200000 - 350000 (microamps), step by 50000 (rounded down)
 595                 - 0: disabled.
 596
 597 What:           /sys/class/power_supply/max77693-charger/device/top_off_timer
 598 Date:           January 2015
 599 KernelVersion:  3.19.0
 600 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 601 Description:
 602                 This entry shows and sets the maximum time the max77693
 603                 charger operates in top-off charge mode. When the timer expires
 604                 the device will terminate top-off charge mode (charging current
 605                 will drop to 0 A) and will trigger interrupt.
 606
 607                 Valid values:
 608                 - 0 - 70 (minutes), step by 10 (rounded down)
 609
 610 What:           /sys/class/power_supply/bq24257-charger/ovp_voltage
 611 Date:           October 2015
 612 KernelVersion:  4.4.0
 613 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 614 Description:
 615                 This entry configures the overvoltage protection feature of bq24257-
 616                 type charger devices. This feature protects the device and other
 617                 components against damage from overvoltage on the input supply. See
 618                 device datasheet for details.
 619
 620                 Valid values:
 621                 - 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000,
 622                   10500000 (all uV)
 623
 624 What:           /sys/class/power_supply/bq24257-charger/in_dpm_voltage
 625 Date:           October 2015
 626 KernelVersion:  4.4.0
 627 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 628 Description:
 629                 This entry configures the input dynamic power path management voltage of
 630                 bq24257-type charger devices. Once the supply drops to the configured
 631                 voltage, the input current limit is reduced down to prevent the further
 632                 drop of the supply. When the IC enters this mode, the charge current is
 633                 lower than the set value. See device datasheet for details.
 634
 635                 Valid values:
 636                 - 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
 637                   4760000 (all uV)
 638
 639 What:           /sys/class/power_supply/bq24257-charger/high_impedance_enable
 640 Date:           October 2015
 641 KernelVersion:  4.4.0
 642 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 643 Description:
 644                 This entry allows enabling the high-impedance mode of bq24257-type
 645                 charger devices. If enabled, it places the charger IC into low power
 646                 standby mode with the switch mode controller disabled. When disabled,
 647                 the charger operates normally. See device datasheet for details.
 648
 649                 Valid values:
 650                 - 1: enabled
 651                 - 0: disabled
 652
 653 What:           /sys/class/power_supply/bq24257-charger/sysoff_enable
 654 Date:           October 2015
 655 KernelVersion:  4.4.0
 656 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 657 Description:
 658                 This entry allows enabling the sysoff mode of bq24257-type charger
 659                 devices. If enabled and the input is removed, the internal battery FET
 660                 is turned off in order to reduce the leakage from the BAT pin to less
 661                 than 1uA. Note that on some devices/systems this disconnects the battery
 662                 from the system. See device datasheet for details.
 663
 664                 Valid values:
 665                 - 1: enabled
 666                 - 0: disabled