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                               "Over current"
 194
 195 What:           /sys/class/power_supply/<supply_name>/precharge_current
 196 Date:           June 2017
 197 Contact:        linux-pm@vger.kernel.org
 198 Description:
 199                 Reports the charging current applied during pre-charging phase
 200                 for a battery charge cycle.
 201
 202                 Access: Read
 203                 Valid values: Represented in microamps
 204
 205 What:           /sys/class/power_supply/<supply_name>/present
 206 Date:           May 2007
 207 Contact:        linux-pm@vger.kernel.org
 208 Description:
 209                 Reports whether a battery is present or not in the system.
 210
 211                 Access: Read
 212                 Valid values:
 213                         0: Absent
 214                         1: Present
 215
 216 What:           /sys/class/power_supply/<supply_name>/status
 217 Date:           May 2007
 218 Contact:        linux-pm@vger.kernel.org
 219 Description:
 220                 Represents the charging status of the battery. Normally this
 221                 is read-only reporting although for some supplies this can be
 222                 used to enable/disable charging to the battery.
 223
 224                 Access: Read, Write
 225                 Valid values: "Unknown", "Charging", "Discharging",
 226                               "Not charging", "Full"
 227
 228 What:           /sys/class/power_supply/<supply_name>/technology
 229 Date:           May 2007
 230 Contact:        linux-pm@vger.kernel.org
 231 Description:
 232                 Describes the battery technology supported by the supply.
 233
 234                 Access: Read
 235                 Valid values: "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
 236                               "NiCd", "LiMn"
 237
 238 What:           /sys/class/power_supply/<supply_name>/temp
 239 Date:           May 2007
 240 Contact:        linux-pm@vger.kernel.org
 241 Description:
 242                 Reports the current TBAT battery temperature reading.
 243
 244                 Access: Read
 245                 Valid values: Represented in 1/10 Degrees Celsius
 246
 247 What:           /sys/class/power_supply/<supply_name>/temp_alert_max
 248 Date:           July 2012
 249 Contact:        linux-pm@vger.kernel.org
 250 Description:
 251                 Maximum TBAT temperature trip-wire value where the supply will
 252                 notify user-space of the event. This is normally used for the
 253                 battery charging scenario where user-space needs to know the
 254                 battery temperature has crossed an upper threshold so it can
 255                 take appropriate action (e.g. warning user that battery level is
 256                 critically high, and charging has stopped).
 257
 258                 Access: Read
 259                 Valid values: Represented in 1/10 Degrees Celsius
 260
 261 What:           /sys/class/power_supply/<supply_name>/temp_alert_min
 262 Date:           July 2012
 263 Contact:        linux-pm@vger.kernel.org
 264 Description:
 265                 Minimum TBAT temperature trip-wire value where the supply will
 266                 notify user-space of the event. This is normally used for the
 267                 battery charging scenario where user-space needs to know the
 268                 battery temperature has crossed a lower threshold so it can take
 269                 appropriate action (e.g. warning user that battery level is
 270                 high, and charging current has been reduced accordingly to
 271                 remedy the situation).
 272
 273                 Access: Read
 274                 Valid values: Represented in 1/10 Degrees Celsius
 275
 276 What:           /sys/class/power_supply/<supply_name>/temp_max
 277 Date:           July 2014
 278 Contact:        linux-pm@vger.kernel.org
 279 Description:
 280                 Reports the maximum allowed TBAT battery temperature for
 281                 charging.
 282
 283                 Access: Read
 284                 Valid values: Represented in 1/10 Degrees Celsius
 285
 286 What:           /sys/class/power_supply/<supply_name>/temp_min
 287 Date:           July 2014
 288 Contact:        linux-pm@vger.kernel.org
 289 Description:
 290                 Reports the minimum allowed TBAT battery temperature for
 291                 charging.
 292
 293                 Access: Read
 294                 Valid values: Represented in 1/10 Degrees Celsius
 295
 296 What:           /sys/class/power_supply/<supply_name>/voltage_avg,
 297 Date:           May 2007
 298 Contact:        linux-pm@vger.kernel.org
 299 Description:
 300                 Reports an average VBAT voltage reading for the battery, over a
 301                 fixed period. Normally devices will provide a fixed interval in
 302                 which they average readings to smooth out the reported value.
 303
 304                 Access: Read
 305                 Valid values: Represented in microvolts
 306
 307 What:           /sys/class/power_supply/<supply_name>/voltage_max,
 308 Date:           January 2008
 309 Contact:        linux-pm@vger.kernel.org
 310 Description:
 311                 Reports the maximum safe VBAT voltage permitted for the battery,
 312                 during charging.
 313
 314                 Access: Read
 315                 Valid values: Represented in microvolts
 316
 317 What:           /sys/class/power_supply/<supply_name>/voltage_min,
 318 Date:           January 2008
 319 Contact:        linux-pm@vger.kernel.org
 320 Description:
 321                 Reports the minimum safe VBAT voltage permitted for the battery,
 322                 during discharging.
 323
 324                 Access: Read
 325                 Valid values: Represented in microvolts
 326
 327 What:           /sys/class/power_supply/<supply_name>/voltage_now,
 328 Date:           May 2007
 329 Contact:        linux-pm@vger.kernel.org
 330 Description:
 331                 Reports an instant, single VBAT voltage reading for the battery.
 332                 This value is not averaged/smoothed.
 333
 334                 Access: Read
 335                 Valid values: Represented in microvolts
 336
 337 ===== USB Properties =====
 338
 339 What:           /sys/class/power_supply/<supply_name>/current_avg
 340 Date:           May 2007
 341 Contact:        linux-pm@vger.kernel.org
 342 Description:
 343                 Reports an average IBUS current reading over a fixed period.
 344                 Normally devices will provide a fixed interval in which they
 345                 average readings to smooth out the reported value.
 346
 347                 Access: Read
 348                 Valid values: Represented in microamps
 349
 350
 351 What:           /sys/class/power_supply/<supply_name>/current_max
 352 Date:           October 2010
 353 Contact:        linux-pm@vger.kernel.org
 354 Description:
 355                 Reports the maximum IBUS current the supply can support.
 356
 357                 Access: Read
 358                 Valid values: Represented in microamps
 359
 360 What:           /sys/class/power_supply/<supply_name>/current_now
 361 Date:           May 2007
 362 Contact:        linux-pm@vger.kernel.org
 363 Description:
 364                 Reports the IBUS current supplied now. This value is generally
 365                 read-only reporting, unless the 'online' state of the supply
 366                 is set to be programmable, in which case this value can be set
 367                 within the reported min/max range.
 368
 369                 Access: Read, Write
 370                 Valid values: Represented in microamps
 371
 372 What:           /sys/class/power_supply/<supply_name>/input_current_limit
 373 Date:           July 2014
 374 Contact:        linux-pm@vger.kernel.org
 375 Description:
 376                 Details the incoming IBUS current limit currently set in the
 377                 supply. Normally this is configured based on the type of
 378                 connection made (e.g. A configured SDP should output a maximum
 379                 of 500mA so the input current limit is set to the same value).
 380                 Use preferably input_power_limit, and for problems that can be
 381                 solved using power limit use input_current_limit.
 382
 383                 Access: Read, Write
 384                 Valid values: Represented in microamps
 385
 386 What:           /sys/class/power_supply/<supply_name>/input_voltage_limit
 387 Date:           May 2019
 388 Contact:        linux-pm@vger.kernel.org
 389 Description:
 390                 This entry configures the incoming VBUS voltage limit currently
 391                 set in the supply. Normally this is configured based on
 392                 system-level knowledge or user input (e.g. This is part of the
 393                 Pixel C's thermal management strategy to effectively limit the
 394                 input power to 5V when the screen is on to meet Google's skin
 395                 temperature targets). Note that this feature should not be
 396                 used for safety critical things.
 397                 Use preferably input_power_limit, and for problems that can be
 398                 solved using power limit use input_voltage_limit.
 399
 400                 Access: Read, Write
 401                 Valid values: Represented in microvolts
 402
 403 What:           /sys/class/power_supply/<supply_name>/input_power_limit
 404 Date:           May 2019
 405 Contact:        linux-pm@vger.kernel.org
 406 Description:
 407                 This entry configures the incoming power limit currently set
 408                 in the supply. Normally this is configured based on
 409                 system-level knowledge or user input. Use preferably this
 410                 feature to limit the incoming power and use current/voltage
 411                 limit only for problems that can be solved using power limit.
 412
 413                 Access: Read, Write
 414                 Valid values: Represented in microwatts
 415
 416 What:           /sys/class/power_supply/<supply_name>/online,
 417 Date:           May 2007
 418 Contact:        linux-pm@vger.kernel.org
 419 Description:
 420                 Indicates if VBUS is present for the supply. When the supply is
 421                 online, and the supply allows it, then it's possible to switch
 422                 between online states (e.g. Fixed -> Programmable for a PD_PPS
 423                 USB supply so voltage and current can be controlled).
 424
 425                 Access: Read, Write
 426                 Valid values:
 427                         0: Offline
 428                         1: Online Fixed - Fixed Voltage Supply
 429                         2: Online Programmable - Programmable Voltage Supply
 430
 431 What:           /sys/class/power_supply/<supply_name>/temp
 432 Date:           May 2007
 433 Contact:        linux-pm@vger.kernel.org
 434 Description:
 435                 Reports the current supply temperature reading. This would
 436                 normally be the internal temperature of the device itself (e.g
 437                 TJUNC temperature of an IC)
 438
 439                 Access: Read
 440                 Valid values: Represented in 1/10 Degrees Celsius
 441
 442 What:           /sys/class/power_supply/<supply_name>/temp_alert_max
 443 Date:           July 2012
 444 Contact:        linux-pm@vger.kernel.org
 445 Description:
 446                 Maximum supply temperature trip-wire value where the supply will
 447                 notify user-space of the event. This is normally used for the
 448                 charging scenario where user-space needs to know the supply
 449                 temperature has crossed an upper threshold so it can take
 450                 appropriate action (e.g. warning user that the supply
 451                 temperature is critically high, and charging has stopped to
 452                 remedy the situation).
 453
 454                 Access: Read
 455                 Valid values: Represented in 1/10 Degrees Celsius
 456
 457 What:           /sys/class/power_supply/<supply_name>/temp_alert_min
 458 Date:           July 2012
 459 Contact:        linux-pm@vger.kernel.org
 460 Description:
 461                 Minimum supply temperature trip-wire value where the supply will
 462                 notify user-space of the event. This is normally used for the
 463                 charging scenario where user-space needs to know the supply
 464                 temperature has crossed a lower threshold so it can take
 465                 appropriate action (e.g. warning user that the supply
 466                 temperature is high, and charging current has been reduced
 467                 accordingly to remedy the situation).
 468
 469                 Access: Read
 470                 Valid values: Represented in 1/10 Degrees Celsius
 471
 472 What:           /sys/class/power_supply/<supply_name>/temp_max
 473 Date:           July 2014
 474 Contact:        linux-pm@vger.kernel.org
 475 Description:
 476                 Reports the maximum allowed supply temperature for operation.
 477
 478                 Access: Read
 479                 Valid values: Represented in 1/10 Degrees Celsius
 480
 481 What:           /sys/class/power_supply/<supply_name>/temp_min
 482 Date:           July 2014
 483 Contact:        linux-pm@vger.kernel.org
 484 Description:
 485                 Reports the mainimum allowed supply temperature for operation.
 486
 487                 Access: Read
 488                 Valid values: Represented in 1/10 Degrees Celsius
 489
 490 What:           /sys/class/power_supply/<supply_name>/usb_type
 491 Date:           March 2018
 492 Contact:        linux-pm@vger.kernel.org
 493 Description:
 494                 Reports what type of USB connection is currently active for
 495                 the supply, for example it can show if USB-PD capable source
 496                 is attached.
 497
 498                 Access: Read-Only
 499                 Valid values: "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
 500                               "PD_DRP", "PD_PPS", "BrickID"
 501
 502 What:           /sys/class/power_supply/<supply_name>/voltage_max
 503 Date:           January 2008
 504 Contact:        linux-pm@vger.kernel.org
 505 Description:
 506                 Reports the maximum VBUS voltage the supply can support.
 507
 508                 Access: Read
 509                 Valid values: Represented in microvolts
 510
 511 What:           /sys/class/power_supply/<supply_name>/voltage_min
 512 Date:           January 2008
 513 Contact:        linux-pm@vger.kernel.org
 514 Description:
 515                 Reports the minimum VBUS voltage the supply can support.
 516
 517                 Access: Read
 518                 Valid values: Represented in microvolts
 519
 520 What:           /sys/class/power_supply/<supply_name>/voltage_now
 521 Date:           May 2007
 522 Contact:        linux-pm@vger.kernel.org
 523 Description:
 524                 Reports the VBUS voltage supplied now. This value is generally
 525                 read-only reporting, unless the 'online' state of the supply
 526                 is set to be programmable, in which case this value can be set
 527                 within the reported min/max range.
 528
 529                 Access: Read, Write
 530                 Valid values: Represented in microvolts
 531
 532 ===== Device Specific Properties =====
 533
 534 What:           /sys/class/power/ds2760-battery.*/charge_now
 535 Date:           May 2010
 536 KernelVersion:  2.6.35
 537 Contact:        Daniel Mack <daniel@caiaq.de>
 538 Description:
 539                 This file is writeable and can be used to set the current
 540                 coloumb counter value inside the battery monitor chip. This
 541                 is needed for unavoidable corrections of aging batteries.
 542                 A userspace daemon can monitor the battery charging logic
 543                 and once the counter drops out of considerable bounds, take
 544                 appropriate action.
 545
 546 What:           /sys/class/power/ds2760-battery.*/charge_full
 547 Date:           May 2010
 548 KernelVersion:  2.6.35
 549 Contact:        Daniel Mack <daniel@caiaq.de>
 550 Description:
 551                 This file is writeable and can be used to set the assumed
 552                 battery 'full level'. As batteries age, this value has to be
 553                 amended over time.
 554
 555 What:           /sys/class/power_supply/max14577-charger/device/fast_charge_timer
 556 Date:           October 2014
 557 KernelVersion:  3.18.0
 558 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 559 Description:
 560                 This entry shows and sets the maximum time the max14577
 561                 charger operates in fast-charge mode. When the timer expires
 562                 the device will terminate fast-charge mode (charging current
 563                 will drop to 0 A) and will trigger interrupt.
 564
 565                 Valid values:
 566                 - 5, 6 or 7 (hours),
 567                 - 0: disabled.
 568
 569 What:           /sys/class/power_supply/max77693-charger/device/fast_charge_timer
 570 Date:           January 2015
 571 KernelVersion:  3.19.0
 572 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 573 Description:
 574                 This entry shows and sets the maximum time the max77693
 575                 charger operates in fast-charge mode. When the timer expires
 576                 the device will terminate fast-charge mode (charging current
 577                 will drop to 0 A) and will trigger interrupt.
 578
 579                 Valid values:
 580                 - 4 - 16 (hours), step by 2 (rounded down)
 581                 - 0: disabled.
 582
 583 What:           /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
 584 Date:           January 2015
 585 KernelVersion:  3.19.0
 586 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 587 Description:
 588                 This entry shows and sets the charging current threshold for
 589                 entering top-off charging mode. When charging current in fast
 590                 charge mode drops below this value, the charger will trigger
 591                 interrupt and start top-off charging mode.
 592
 593                 Valid values:
 594                 - 100000 - 200000 (microamps), step by 25000 (rounded down)
 595                 - 200000 - 350000 (microamps), step by 50000 (rounded down)
 596                 - 0: disabled.
 597
 598 What:           /sys/class/power_supply/max77693-charger/device/top_off_timer
 599 Date:           January 2015
 600 KernelVersion:  3.19.0
 601 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 602 Description:
 603                 This entry shows and sets the maximum time the max77693
 604                 charger operates in top-off charge mode. When the timer expires
 605                 the device will terminate top-off charge mode (charging current
 606                 will drop to 0 A) and will trigger interrupt.
 607
 608                 Valid values:
 609                 - 0 - 70 (minutes), step by 10 (rounded down)
 610
 611 What:           /sys/class/power_supply/bq24257-charger/ovp_voltage
 612 Date:           October 2015
 613 KernelVersion:  4.4.0
 614 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 615 Description:
 616                 This entry configures the overvoltage protection feature of bq24257-
 617                 type charger devices. This feature protects the device and other
 618                 components against damage from overvoltage on the input supply. See
 619                 device datasheet for details.
 620
 621                 Valid values:
 622                 - 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000,
 623                   10500000 (all uV)
 624
 625 What:           /sys/class/power_supply/bq24257-charger/in_dpm_voltage
 626 Date:           October 2015
 627 KernelVersion:  4.4.0
 628 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 629 Description:
 630                 This entry configures the input dynamic power path management voltage of
 631                 bq24257-type charger devices. Once the supply drops to the configured
 632                 voltage, the input current limit is reduced down to prevent the further
 633                 drop of the supply. When the IC enters this mode, the charge current is
 634                 lower than the set value. See device datasheet for details.
 635
 636                 Valid values:
 637                 - 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
 638                   4760000 (all uV)
 639
 640 What:           /sys/class/power_supply/bq24257-charger/high_impedance_enable
 641 Date:           October 2015
 642 KernelVersion:  4.4.0
 643 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 644 Description:
 645                 This entry allows enabling the high-impedance mode of bq24257-type
 646                 charger devices. If enabled, it places the charger IC into low power
 647                 standby mode with the switch mode controller disabled. When disabled,
 648                 the charger operates normally. See device datasheet for details.
 649
 650                 Valid values:
 651                 - 1: enabled
 652                 - 0: disabled
 653
 654 What:           /sys/class/power_supply/bq24257-charger/sysoff_enable
 655 Date:           October 2015
 656 KernelVersion:  4.4.0
 657 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 658 Description:
 659                 This entry allows enabling the sysoff mode of bq24257-type charger
 660                 devices. If enabled and the input is removed, the internal battery FET
 661                 is turned off in order to reduce the leakage from the BAT pin to less
 662                 than 1uA. Note that on some devices/systems this disconnects the battery
 663                 from the system. See device datasheet for details.
 664
 665                 Valid values:
 666                 - 1: enabled
 667                 - 0: disabled