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", "Wireless"
  38
  39 **Battery and USB properties**
  40
  41 What:           /sys/class/power_supply/<supply_name>/current_avg
  42 Date:           May 2007
  43 Contact:        linux-pm@vger.kernel.org
  44 Description:
  45                 Battery:
  46
  47                   Reports an average IBAT current reading for the battery, over
  48                   a fixed period. Normally devices will provide a fixed interval
  49                   in which they average readings to smooth out the reported
  50                   value.
  51
  52                 USB:
  53
  54                   Reports an average IBUS current reading over a fixed period.
  55                   Normally devices will provide a fixed interval in which they
  56                   average readings to smooth out the reported value.
  57
  58                 Access: Read
  59
  60                 Valid values: Represented in microamps. Negative values are
  61                 used for discharging batteries, positive values for charging
  62                 batteries and for USB IBUS current.
  63
  64 What:           /sys/class/power_supply/<supply_name>/current_max
  65 Date:           October 2010
  66 Contact:        linux-pm@vger.kernel.org
  67 Description:
  68                 Battery:
  69
  70                   Reports the maximum IBAT current allowed into the battery.
  71
  72                 USB:
  73
  74                   Reports the maximum IBUS current the supply can support.
  75
  76                 Access: Read
  77                 Valid values: Represented in microamps
  78
  79 What:           /sys/class/power_supply/<supply_name>/current_now
  80 Date:           May 2007
  81 Contact:        linux-pm@vger.kernel.org
  82 Description:
  83
  84                 Battery:
  85
  86                   Reports an instant, single IBAT current reading for the
  87                   battery. This value is not averaged/smoothed.
  88
  89                   Access: Read
  90
  91                 USB:
  92
  93                   Reports the IBUS current supplied now. This value is generally
  94                   read-only reporting, unless the 'online' state of the supply
  95                   is set to be programmable, in which case this value can be set
  96                   within the reported min/max range.
  97
  98                   Access: Read, Write
  99
 100                 Valid values: Represented in microamps. Negative values are
 101                 used for discharging batteries, positive values for charging
 102                 batteries and for USB IBUS current.
 103
 104 What:           /sys/class/power_supply/<supply_name>/temp
 105 Date:           May 2007
 106 Contact:        linux-pm@vger.kernel.org
 107 Description:
 108                 Battery:
 109
 110                   Reports the current TBAT battery temperature reading.
 111
 112                 USB:
 113
 114                   Reports the current supply temperature reading. This would
 115                   normally be the internal temperature of the device itself
 116                   (e.g TJUNC temperature of an IC)
 117
 118                 Access: Read
 119
 120                 Valid values: Represented in 1/10 Degrees Celsius
 121
 122 What:           /sys/class/power_supply/<supply_name>/temp_alert_max
 123 Date:           July 2012
 124 Contact:        linux-pm@vger.kernel.org
 125 Description:
 126                 Battery:
 127
 128                   Maximum TBAT temperature trip-wire value where the supply will
 129                   notify user-space of the event.
 130
 131                 USB:
 132
 133                   Maximum supply temperature trip-wire value where the supply
 134                   will notify user-space of the event.
 135
 136                 This is normally used for the charging scenario where
 137                 user-space needs to know if the temperature has crossed an
 138                 upper threshold so it can take appropriate action (e.g. warning
 139                 user that the temperature is critically high, and charging has
 140                 stopped).
 141
 142                 Access: Read
 143
 144                 Valid values: Represented in 1/10 Degrees Celsius
 145
 146 What:           /sys/class/power_supply/<supply_name>/temp_alert_min
 147 Date:           July 2012
 148 Contact:        linux-pm@vger.kernel.org
 149 Description:
 150
 151                 Battery:
 152
 153                   Minimum TBAT temperature trip-wire value where the supply will
 154                   notify user-space of the event.
 155
 156                 USB:
 157
 158                   Minimum supply temperature trip-wire value where the supply
 159                   will notify user-space of the event.
 160
 161                 This is normally used for the charging scenario where user-space
 162                 needs to know if the temperature has crossed a lower threshold
 163                 so it can take appropriate action (e.g. warning user that
 164                 temperature level is high, and charging current has been
 165                 reduced accordingly to remedy the situation).
 166
 167                 Access: Read
 168
 169                 Valid values: Represented in 1/10 Degrees Celsius
 170
 171 What:           /sys/class/power_supply/<supply_name>/temp_max
 172 Date:           July 2014
 173 Contact:        linux-pm@vger.kernel.org
 174 Description:
 175                 Battery:
 176
 177                   Reports the maximum allowed TBAT battery temperature for
 178                   charging.
 179
 180                 USB:
 181
 182                   Reports the maximum allowed supply temperature for operation.
 183
 184                 Access: Read
 185
 186                 Valid values: Represented in 1/10 Degrees Celsius
 187
 188 What:           /sys/class/power_supply/<supply_name>/temp_min
 189 Date:           July 2014
 190 Contact:        linux-pm@vger.kernel.org
 191 Description:
 192                 Battery:
 193
 194                   Reports the minimum allowed TBAT battery temperature for
 195                   charging.
 196
 197                 USB:
 198
 199                   Reports the minimum allowed supply temperature for operation.
 200
 201                 Access: Read
 202
 203                 Valid values: Represented in 1/10 Degrees Celsius
 204
 205 What:           /sys/class/power_supply/<supply_name>/voltage_max,
 206 Date:           January 2008
 207 Contact:        linux-pm@vger.kernel.org
 208 Description:
 209                 Battery:
 210
 211                   Reports the maximum safe VBAT voltage permitted for the
 212                   battery, during charging.
 213
 214                 USB:
 215
 216                   Reports the maximum VBUS voltage the supply can support.
 217
 218                 Access: Read
 219
 220                 Valid values: Represented in microvolts
 221
 222 What:           /sys/class/power_supply/<supply_name>/voltage_min,
 223 Date:           January 2008
 224 Contact:        linux-pm@vger.kernel.org
 225 Description:
 226                 Battery:
 227
 228                   Reports the minimum safe VBAT voltage permitted for the
 229                   battery, during discharging.
 230
 231                 USB:
 232
 233                   Reports the minimum VBUS voltage the supply can support.
 234
 235                 Access: Read
 236
 237                 Valid values: Represented in microvolts
 238
 239 What:           /sys/class/power_supply/<supply_name>/voltage_now,
 240 Date:           May 2007
 241 Contact:        linux-pm@vger.kernel.org
 242 Description:
 243                 Battery:
 244
 245                   Reports an instant, single VBAT voltage reading for the
 246                   battery. This value is not averaged/smoothed.
 247
 248                   Access: Read
 249
 250                 USB:
 251
 252                   Reports the VBUS voltage supplied now. This value is generally
 253                   read-only reporting, unless the 'online' state of the supply
 254                   is set to be programmable, in which case this value can be set
 255                   within the reported min/max range.
 256
 257                   Access: Read, Write
 258
 259                 Valid values: Represented in microvolts
 260
 261 **Battery Properties**
 262
 263 What:           /sys/class/power_supply/<supply_name>/capacity
 264 Date:           May 2007
 265 Contact:        linux-pm@vger.kernel.org
 266 Description:
 267                 Fine grain representation of battery capacity.
 268
 269                 Access: Read
 270
 271                 Valid values: 0 - 100 (percent)
 272
 273 What:           /sys/class/power_supply/<supply_name>/capacity_alert_max
 274 Date:           July 2012
 275 Contact:        linux-pm@vger.kernel.org
 276 Description:
 277                 Maximum battery capacity trip-wire value where the supply will
 278                 notify user-space of the event. This is normally used for the
 279                 battery discharging scenario where user-space needs to know the
 280                 battery has dropped to an upper level so it can take
 281                 appropriate action (e.g. warning user that battery level is
 282                 low).
 283
 284                 Access: Read, Write
 285
 286                 Valid values: 0 - 100 (percent)
 287
 288 What:           /sys/class/power_supply/<supply_name>/capacity_alert_min
 289 Date:           July 2012
 290 Contact:        linux-pm@vger.kernel.org
 291 Description:
 292                 Minimum battery capacity trip-wire value where the supply will
 293                 notify user-space of the event. This is normally used for the
 294                 battery discharging scenario where user-space needs to know the
 295                 battery has dropped to a lower level so it can take
 296                 appropriate action (e.g. warning user that battery level is
 297                 critically low).
 298
 299                 Access: Read, Write
 300
 301                 Valid values: 0 - 100 (percent)
 302
 303 What:           /sys/class/power_supply/<supply_name>/capacity_error_margin
 304 Date:           April 2019
 305 Contact:        linux-pm@vger.kernel.org
 306 Description:
 307                 Battery capacity measurement becomes unreliable without
 308                 recalibration. This values provides the maximum error
 309                 margin expected to exist by the fuel gauge in percent.
 310                 Values close to 0% will be returned after (re-)calibration
 311                 has happened. Over time the error margin will increase.
 312                 100% means, that the capacity related values are basically
 313                 completely useless.
 314
 315                 Access: Read
 316
 317                 Valid values: 0 - 100 (percent)
 318
 319 What:           /sys/class/power_supply/<supply_name>/capacity_level
 320 Date:           June 2009
 321 Contact:        linux-pm@vger.kernel.org
 322 Description:
 323                 Coarse representation of battery capacity.
 324
 325                 Access: Read
 326
 327                 Valid values:
 328                               "Unknown", "Critical", "Low", "Normal", "High",
 329                               "Full"
 330
 331 What:           /sys/class/power_supply/<supply_name>/charge_control_limit
 332 Date:           Oct 2012
 333 Contact:        linux-pm@vger.kernel.org
 334 Description:
 335                 Maximum allowable charging current. Used for charge rate
 336                 throttling for thermal cooling or improving battery health.
 337
 338                 Access: Read, Write
 339
 340                 Valid values: Represented in microamps
 341
 342 What:           /sys/class/power_supply/<supply_name>/charge_control_limit_max
 343 Date:           Oct 2012
 344 Contact:        linux-pm@vger.kernel.org
 345 Description:
 346                 Maximum legal value for the charge_control_limit property.
 347
 348                 Access: Read
 349
 350                 Valid values: Represented in microamps
 351
 352 What:           /sys/class/power_supply/<supply_name>/charge_control_start_threshold
 353 Date:           April 2019
 354 Contact:        linux-pm@vger.kernel.org
 355 Description:
 356                 Represents a battery percentage level, below which charging will
 357                 begin.
 358
 359                 Access: Read, Write
 360                 Valid values: 0 - 100 (percent)
 361
 362 What:           /sys/class/power_supply/<supply_name>/charge_control_end_threshold
 363 Date:           April 2019
 364 Contact:        linux-pm@vger.kernel.org
 365 Description:
 366                 Represents a battery percentage level, above which charging will
 367                 stop. Not all hardware is capable of setting this to an arbitrary
 368                 percentage. Drivers will round written values to the nearest
 369                 supported value. Reading back the value will show the actual
 370                 threshold set by the driver.
 371
 372                 Access: Read, Write
 373
 374                 Valid values: 0 - 100 (percent)
 375
 376 What:           /sys/class/power_supply/<supply_name>/charge_type
 377 Date:           July 2009
 378 Contact:        linux-pm@vger.kernel.org
 379 Description:
 380                 Represents the type of charging currently being applied to the
 381                 battery. "Trickle", "Fast", and "Standard" all mean different
 382                 charging speeds. "Adaptive" means that the charger uses some
 383                 algorithm to adjust the charge rate dynamically, without
 384                 any user configuration required. "Custom" means that the charger
 385                 uses the charge_control_* properties as configuration for some
 386                 different algorithm. "Long Life" means the charger reduces its
 387                 charging rate in order to prolong the battery health. "Bypass"
 388                 means the charger bypasses the charging path around the
 389                 integrated converter allowing for a "smart" wall adaptor to
 390                 perform the power conversion externally.
 391
 392                 Access: Read, Write
 393
 394                 Valid values:
 395                               "Unknown", "N/A", "Trickle", "Fast", "Standard",
 396                               "Adaptive", "Custom", "Long Life", "Bypass"
 397
 398 What:           /sys/class/power_supply/<supply_name>/charge_term_current
 399 Date:           July 2014
 400 Contact:        linux-pm@vger.kernel.org
 401 Description:
 402                 Reports the charging current value which is used to determine
 403                 when the battery is considered full and charging should end.
 404
 405                 Access: Read
 406
 407                 Valid values: Represented in microamps
 408
 409 What:           /sys/class/power_supply/<supply_name>/health
 410 Date:           May 2007
 411 Contact:        linux-pm@vger.kernel.org
 412 Description:
 413                 Reports the health of the battery or battery side of charger
 414                 functionality.
 415
 416                 Access: Read
 417
 418                 Valid values:
 419                               "Unknown", "Good", "Overheat", "Dead",
 420                               "Over voltage", "Unspecified failure", "Cold",
 421                               "Watchdog timer expire", "Safety timer expire",
 422                               "Over current", "Calibration required", "Warm",
 423                               "Cool", "Hot", "No battery"
 424
 425 What:           /sys/class/power_supply/<supply_name>/precharge_current
 426 Date:           June 2017
 427 Contact:        linux-pm@vger.kernel.org
 428 Description:
 429                 Reports the charging current applied during pre-charging phase
 430                 for a battery charge cycle.
 431
 432                 Access: Read
 433
 434                 Valid values: Represented in microamps
 435
 436 What:           /sys/class/power_supply/<supply_name>/present
 437 Date:           May 2007
 438 Contact:        linux-pm@vger.kernel.org
 439 Description:
 440                 Reports whether a battery is present or not in the system. If the
 441                 property does not exist, the battery is considered to be present.
 442
 443                 Access: Read
 444
 445                 Valid values:
 446
 447                         == =======
 448                         0: Absent
 449                         1: Present
 450                         == =======
 451
 452 What:           /sys/class/power_supply/<supply_name>/status
 453 Date:           May 2007
 454 Contact:        linux-pm@vger.kernel.org
 455 Description:
 456                 Represents the charging status of the battery. Normally this
 457                 is read-only reporting although for some supplies this can be
 458                 used to enable/disable charging to the battery.
 459
 460                 Access: Read, Write
 461
 462                 Valid values:
 463                               "Unknown", "Charging", "Discharging",
 464                               "Not charging", "Full"
 465
 466 What:           /sys/class/power_supply/<supply_name>/charge_behaviour
 467 Date:           November 2021
 468 Contact:        linux-pm@vger.kernel.org
 469 Description:
 470                 Represents the charging behaviour.
 471
 472                 Access: Read, Write
 473
 474                 Valid values:
 475                         ================ ====================================
 476                         auto:            Charge normally, respect thresholds
 477                         inhibit-charge:  Do not charge while AC is attached
 478                         force-discharge: Force discharge while AC is attached
 479                         ================ ====================================
 480
 481 What:           /sys/class/power_supply/<supply_name>/technology
 482 Date:           May 2007
 483 Contact:        linux-pm@vger.kernel.org
 484 Description:
 485                 Describes the battery technology supported by the supply.
 486
 487                 Access: Read
 488
 489                 Valid values:
 490                               "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
 491                               "NiCd", "LiMn"
 492
 493
 494 What:           /sys/class/power_supply/<supply_name>/voltage_avg,
 495 Date:           May 2007
 496 Contact:        linux-pm@vger.kernel.org
 497 Description:
 498                 Reports an average VBAT voltage reading for the battery, over a
 499                 fixed period. Normally devices will provide a fixed interval in
 500                 which they average readings to smooth out the reported value.
 501
 502                 Access: Read
 503
 504                 Valid values: Represented in microvolts
 505
 506 What:           /sys/class/power_supply/<supply_name>/cycle_count
 507 Date:           January 2010
 508 Contact:        linux-pm@vger.kernel.org
 509 Description:
 510                 Reports the number of full charge + discharge cycles the
 511                 battery has undergone.
 512
 513                 Access: Read
 514
 515                 Valid values:
 516                         Integer > 0: representing full cycles
 517                         Integer = 0: cycle_count info is not available
 518
 519 **USB Properties**
 520
 521 What:           /sys/class/power_supply/<supply_name>/input_current_limit
 522 Date:           July 2014
 523 Contact:        linux-pm@vger.kernel.org
 524 Description:
 525                 Details the incoming IBUS current limit currently set in the
 526                 supply. Normally this is configured based on the type of
 527                 connection made (e.g. A configured SDP should output a maximum
 528                 of 500mA so the input current limit is set to the same value).
 529                 Use preferably input_power_limit, and for problems that can be
 530                 solved using power limit use input_current_limit.
 531
 532                 Access: Read, Write
 533
 534                 Valid values: Represented in microamps
 535
 536 What:           /sys/class/power_supply/<supply_name>/input_voltage_limit
 537 Date:           May 2019
 538 Contact:        linux-pm@vger.kernel.org
 539 Description:
 540                 This entry configures the incoming VBUS voltage limit currently
 541                 set in the supply. Normally this is configured based on
 542                 system-level knowledge or user input (e.g. This is part of the
 543                 Pixel C's thermal management strategy to effectively limit the
 544                 input power to 5V when the screen is on to meet Google's skin
 545                 temperature targets). Note that this feature should not be
 546                 used for safety critical things.
 547                 Use preferably input_power_limit, and for problems that can be
 548                 solved using power limit use input_voltage_limit.
 549
 550                 Access: Read, Write
 551
 552                 Valid values: Represented in microvolts
 553
 554 What:           /sys/class/power_supply/<supply_name>/input_power_limit
 555 Date:           May 2019
 556 Contact:        linux-pm@vger.kernel.org
 557 Description:
 558                 This entry configures the incoming power limit currently set
 559                 in the supply. Normally this is configured based on
 560                 system-level knowledge or user input. Use preferably this
 561                 feature to limit the incoming power and use current/voltage
 562                 limit only for problems that can be solved using power limit.
 563
 564                 Access: Read, Write
 565
 566                 Valid values: Represented in microwatts
 567
 568 What:           /sys/class/power_supply/<supply_name>/online,
 569 Date:           May 2007
 570 Contact:        linux-pm@vger.kernel.org
 571 Description:
 572                 Indicates if VBUS is present for the supply. When the supply is
 573                 online, and the supply allows it, then it's possible to switch
 574                 between online states (e.g. Fixed -> Programmable for a PD_PPS
 575                 USB supply so voltage and current can be controlled).
 576
 577                 Access: Read, Write
 578
 579                 Valid values:
 580
 581                         == ==================================================
 582                         0: Offline
 583                         1: Online Fixed - Fixed Voltage Supply
 584                         2: Online Programmable - Programmable Voltage Supply
 585                         == ==================================================
 586
 587 What:           /sys/class/power_supply/<supply_name>/usb_type
 588 Date:           March 2018
 589 Contact:        linux-pm@vger.kernel.org
 590 Description:
 591                 Reports what type of USB connection is currently active for
 592                 the supply, for example it can show if USB-PD capable source
 593                 is attached.
 594
 595                 Access: Read-Only
 596
 597                 Valid values:
 598                               "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
 599                               "PD_DRP", "PD_PPS", "BrickID"
 600
 601 **Device Specific Properties**
 602
 603 What:           /sys/class/power/ds2760-battery.*/charge_now
 604 Date:           May 2010
 605 KernelVersion:  2.6.35
 606 Contact:        Daniel Mack <daniel@caiaq.de>
 607 Description:
 608                 This file is writeable and can be used to set the current
 609                 coloumb counter value inside the battery monitor chip. This
 610                 is needed for unavoidable corrections of aging batteries.
 611                 A userspace daemon can monitor the battery charging logic
 612                 and once the counter drops out of considerable bounds, take
 613                 appropriate action.
 614
 615 What:           /sys/class/power/ds2760-battery.*/charge_full
 616 Date:           May 2010
 617 KernelVersion:  2.6.35
 618 Contact:        Daniel Mack <daniel@caiaq.de>
 619 Description:
 620                 This file is writeable and can be used to set the assumed
 621                 battery 'full level'. As batteries age, this value has to be
 622                 amended over time.
 623
 624 What:           /sys/class/power_supply/max14577-charger/device/fast_charge_timer
 625 Date:           October 2014
 626 KernelVersion:  3.18.0
 627 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 628 Description:
 629                 This entry shows and sets the maximum time the max14577
 630                 charger operates in fast-charge mode. When the timer expires
 631                 the device will terminate fast-charge mode (charging current
 632                 will drop to 0 A) and will trigger interrupt.
 633
 634                 Valid values:
 635
 636                 - 5, 6 or 7 (hours),
 637                 - 0: disabled.
 638
 639 What:           /sys/class/power_supply/max77693-charger/device/fast_charge_timer
 640 Date:           January 2015
 641 KernelVersion:  3.19.0
 642 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 643 Description:
 644                 This entry shows and sets the maximum time the max77693
 645                 charger operates in fast-charge mode. When the timer expires
 646                 the device will terminate fast-charge mode (charging current
 647                 will drop to 0 A) and will trigger interrupt.
 648
 649                 Valid values:
 650
 651                 - 4 - 16 (hours), step by 2 (rounded down)
 652                 - 0: disabled.
 653
 654 What:           /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
 655 Date:           January 2015
 656 KernelVersion:  3.19.0
 657 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 658 Description:
 659                 This entry shows and sets the charging current threshold for
 660                 entering top-off charging mode. When charging current in fast
 661                 charge mode drops below this value, the charger will trigger
 662                 interrupt and start top-off charging mode.
 663
 664                 Valid values:
 665
 666                 - 100000 - 200000 (microamps), step by 25000 (rounded down)
 667                 - 200000 - 350000 (microamps), step by 50000 (rounded down)
 668                 - 0: disabled.
 669
 670 What:           /sys/class/power_supply/max77693-charger/device/top_off_timer
 671 Date:           January 2015
 672 KernelVersion:  3.19.0
 673 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 674 Description:
 675                 This entry shows and sets the maximum time the max77693
 676                 charger operates in top-off charge mode. When the timer expires
 677                 the device will terminate top-off charge mode (charging current
 678                 will drop to 0 A) and will trigger interrupt.
 679
 680                 Valid values:
 681
 682                 - 0 - 70 (minutes), step by 10 (rounded down)
 683
 684 What:           /sys/class/power_supply/bq24257-charger/ovp_voltage
 685 Date:           October 2015
 686 KernelVersion:  4.4.0
 687 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 688 Description:
 689                 This entry configures the overvoltage protection feature of bq24257-
 690                 type charger devices. This feature protects the device and other
 691                 components against damage from overvoltage on the input supply. See
 692                 device datasheet for details.
 693
 694                 Valid values:
 695
 696                 - 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000,
 697                   10500000 (all uV)
 698
 699 What:           /sys/class/power_supply/bq24257-charger/in_dpm_voltage
 700 Date:           October 2015
 701 KernelVersion:  4.4.0
 702 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 703 Description:
 704                 This entry configures the input dynamic power path management voltage of
 705                 bq24257-type charger devices. Once the supply drops to the configured
 706                 voltage, the input current limit is reduced down to prevent the further
 707                 drop of the supply. When the IC enters this mode, the charge current is
 708                 lower than the set value. See device datasheet for details.
 709
 710                 Valid values:
 711
 712                 - 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
 713                   4760000 (all uV)
 714
 715 What:           /sys/class/power_supply/bq24257-charger/high_impedance_enable
 716 Date:           October 2015
 717 KernelVersion:  4.4.0
 718 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 719 Description:
 720                 This entry allows enabling the high-impedance mode of bq24257-type
 721                 charger devices. If enabled, it places the charger IC into low power
 722                 standby mode with the switch mode controller disabled. When disabled,
 723                 the charger operates normally. See device datasheet for details.
 724
 725                 Valid values:
 726
 727                 - 1: enabled
 728                 - 0: disabled
 729
 730 What:           /sys/class/power_supply/bq24257-charger/sysoff_enable
 731 Date:           October 2015
 732 KernelVersion:  4.4.0
 733 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 734 Description:
 735                 This entry allows enabling the sysoff mode of bq24257-type charger
 736                 devices. If enabled and the input is removed, the internal battery FET
 737                 is turned off in order to reduce the leakage from the BAT pin to less
 738                 than 1uA. Note that on some devices/systems this disconnects the battery
 739                 from the system. See device datasheet for details.
 740
 741                 Valid values:
 742
 743                 - 1: enabled
 744                 - 0: disabled
 745
 746 What:           /sys/class/power_supply/<supply_name>/manufacture_year
 747 Date:           January 2020
 748 Contact:        linux-pm@vger.kernel.org
 749 Description:
 750                 Reports the year (following Gregorian calendar) when the device has been
 751                 manufactured.
 752
 753                 Access: Read
 754
 755                 Valid values: Reported as integer
 756
 757 What:           /sys/class/power_supply/<supply_name>/manufacture_month
 758 Date:           January 2020
 759 Contact:        linux-pm@vger.kernel.org
 760 Description:
 761                 Reports the month when the device has been manufactured.
 762
 763                 Access: Read
 764
 765                 Valid values: 1-12
 766
 767 What:           /sys/class/power_supply/<supply_name>/manufacture_day
 768 Date:           January 2020
 769 Contact:        linux-pm@vger.kernel.org
 770 Description:
 771                 Reports the day of month when the device has been manufactured.
 772
 773                 Access: Read
 774                 Valid values: 1-31