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.
 368
 369                 Access: Read, Write
 370
 371                 Valid values: 0 - 100 (percent)
 372
 373 What:           /sys/class/power_supply/<supply_name>/charge_type
 374 Date:           July 2009
 375 Contact:        linux-pm@vger.kernel.org
 376 Description:
 377                 Represents the type of charging currently being applied to the
 378                 battery. "Trickle", "Fast", and "Standard" all mean different
 379                 charging speeds. "Adaptive" means that the charger uses some
 380                 algorithm to adjust the charge rate dynamically, without
 381                 any user configuration required. "Custom" means that the charger
 382                 uses the charge_control_* properties as configuration for some
 383                 different algorithm. "Long Life" means the charger reduces its
 384                 charging rate in order to prolong the battery health. "Bypass"
 385                 means the charger bypasses the charging path around the
 386                 integrated converter allowing for a "smart" wall adaptor to
 387                 perform the power conversion externally.
 388
 389                 Access: Read, Write
 390
 391                 Valid values:
 392                               "Unknown", "N/A", "Trickle", "Fast", "Standard",
 393                               "Adaptive", "Custom", "Long Life", "Bypass"
 394
 395 What:           /sys/class/power_supply/<supply_name>/charge_term_current
 396 Date:           July 2014
 397 Contact:        linux-pm@vger.kernel.org
 398 Description:
 399                 Reports the charging current value which is used to determine
 400                 when the battery is considered full and charging should end.
 401
 402                 Access: Read
 403
 404                 Valid values: Represented in microamps
 405
 406 What:           /sys/class/power_supply/<supply_name>/health
 407 Date:           May 2007
 408 Contact:        linux-pm@vger.kernel.org
 409 Description:
 410                 Reports the health of the battery or battery side of charger
 411                 functionality.
 412
 413                 Access: Read
 414
 415                 Valid values:
 416                               "Unknown", "Good", "Overheat", "Dead",
 417                               "Over voltage", "Unspecified failure", "Cold",
 418                               "Watchdog timer expire", "Safety timer expire",
 419                               "Over current", "Calibration required", "Warm",
 420                               "Cool", "Hot", "No battery"
 421
 422 What:           /sys/class/power_supply/<supply_name>/precharge_current
 423 Date:           June 2017
 424 Contact:        linux-pm@vger.kernel.org
 425 Description:
 426                 Reports the charging current applied during pre-charging phase
 427                 for a battery charge cycle.
 428
 429                 Access: Read
 430
 431                 Valid values: Represented in microamps
 432
 433 What:           /sys/class/power_supply/<supply_name>/present
 434 Date:           May 2007
 435 Contact:        linux-pm@vger.kernel.org
 436 Description:
 437                 Reports whether a battery is present or not in the system.
 438
 439                 Access: Read
 440
 441                 Valid values:
 442
 443                         == =======
 444                         0: Absent
 445                         1: Present
 446                         == =======
 447
 448 What:           /sys/class/power_supply/<supply_name>/status
 449 Date:           May 2007
 450 Contact:        linux-pm@vger.kernel.org
 451 Description:
 452                 Represents the charging status of the battery. Normally this
 453                 is read-only reporting although for some supplies this can be
 454                 used to enable/disable charging to the battery.
 455
 456                 Access: Read, Write
 457
 458                 Valid values:
 459                               "Unknown", "Charging", "Discharging",
 460                               "Not charging", "Full"
 461
 462 What:           /sys/class/power_supply/<supply_name>/charge_behaviour
 463 Date:           November 2021
 464 Contact:        linux-pm@vger.kernel.org
 465 Description:
 466                 Represents the charging behaviour.
 467
 468                 Access: Read, Write
 469
 470                 Valid values:
 471                         ================ ====================================
 472                         auto:            Charge normally, respect thresholds
 473                         inhibit-charge:  Do not charge while AC is attached
 474                         force-discharge: Force discharge while AC is attached
 475                         ================ ====================================
 476
 477 What:           /sys/class/power_supply/<supply_name>/technology
 478 Date:           May 2007
 479 Contact:        linux-pm@vger.kernel.org
 480 Description:
 481                 Describes the battery technology supported by the supply.
 482
 483                 Access: Read
 484
 485                 Valid values:
 486                               "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
 487                               "NiCd", "LiMn"
 488
 489
 490 What:           /sys/class/power_supply/<supply_name>/voltage_avg,
 491 Date:           May 2007
 492 Contact:        linux-pm@vger.kernel.org
 493 Description:
 494                 Reports an average VBAT voltage reading for the battery, over a
 495                 fixed period. Normally devices will provide a fixed interval in
 496                 which they average readings to smooth out the reported value.
 497
 498                 Access: Read
 499
 500                 Valid values: Represented in microvolts
 501
 502 What:           /sys/class/power_supply/<supply_name>/cycle_count
 503 Date:           January 2010
 504 Contact:        linux-pm@vger.kernel.org
 505 Description:
 506                 Reports the number of full charge + discharge cycles the
 507                 battery has undergone.
 508
 509                 Access: Read
 510
 511                 Valid values:
 512                         Integer > 0: representing full cycles
 513                         Integer = 0: cycle_count info is not available
 514
 515 **USB Properties**
 516
 517 What:           /sys/class/power_supply/<supply_name>/input_current_limit
 518 Date:           July 2014
 519 Contact:        linux-pm@vger.kernel.org
 520 Description:
 521                 Details the incoming IBUS current limit currently set in the
 522                 supply. Normally this is configured based on the type of
 523                 connection made (e.g. A configured SDP should output a maximum
 524                 of 500mA so the input current limit is set to the same value).
 525                 Use preferably input_power_limit, and for problems that can be
 526                 solved using power limit use input_current_limit.
 527
 528                 Access: Read, Write
 529
 530                 Valid values: Represented in microamps
 531
 532 What:           /sys/class/power_supply/<supply_name>/input_voltage_limit
 533 Date:           May 2019
 534 Contact:        linux-pm@vger.kernel.org
 535 Description:
 536                 This entry configures the incoming VBUS voltage limit currently
 537                 set in the supply. Normally this is configured based on
 538                 system-level knowledge or user input (e.g. This is part of the
 539                 Pixel C's thermal management strategy to effectively limit the
 540                 input power to 5V when the screen is on to meet Google's skin
 541                 temperature targets). Note that this feature should not be
 542                 used for safety critical things.
 543                 Use preferably input_power_limit, and for problems that can be
 544                 solved using power limit use input_voltage_limit.
 545
 546                 Access: Read, Write
 547
 548                 Valid values: Represented in microvolts
 549
 550 What:           /sys/class/power_supply/<supply_name>/input_power_limit
 551 Date:           May 2019
 552 Contact:        linux-pm@vger.kernel.org
 553 Description:
 554                 This entry configures the incoming power limit currently set
 555                 in the supply. Normally this is configured based on
 556                 system-level knowledge or user input. Use preferably this
 557                 feature to limit the incoming power and use current/voltage
 558                 limit only for problems that can be solved using power limit.
 559
 560                 Access: Read, Write
 561
 562                 Valid values: Represented in microwatts
 563
 564 What:           /sys/class/power_supply/<supply_name>/online,
 565 Date:           May 2007
 566 Contact:        linux-pm@vger.kernel.org
 567 Description:
 568                 Indicates if VBUS is present for the supply. When the supply is
 569                 online, and the supply allows it, then it's possible to switch
 570                 between online states (e.g. Fixed -> Programmable for a PD_PPS
 571                 USB supply so voltage and current can be controlled).
 572
 573                 Access: Read, Write
 574
 575                 Valid values:
 576
 577                         == ==================================================
 578                         0: Offline
 579                         1: Online Fixed - Fixed Voltage Supply
 580                         2: Online Programmable - Programmable Voltage Supply
 581                         == ==================================================
 582
 583 What:           /sys/class/power_supply/<supply_name>/usb_type
 584 Date:           March 2018
 585 Contact:        linux-pm@vger.kernel.org
 586 Description:
 587                 Reports what type of USB connection is currently active for
 588                 the supply, for example it can show if USB-PD capable source
 589                 is attached.
 590
 591                 Access: Read-Only
 592
 593                 Valid values:
 594                               "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
 595                               "PD_DRP", "PD_PPS", "BrickID"
 596
 597 **Device Specific Properties**
 598
 599 What:           /sys/class/power/ds2760-battery.*/charge_now
 600 Date:           May 2010
 601 KernelVersion:  2.6.35
 602 Contact:        Daniel Mack <daniel@caiaq.de>
 603 Description:
 604                 This file is writeable and can be used to set the current
 605                 coloumb counter value inside the battery monitor chip. This
 606                 is needed for unavoidable corrections of aging batteries.
 607                 A userspace daemon can monitor the battery charging logic
 608                 and once the counter drops out of considerable bounds, take
 609                 appropriate action.
 610
 611 What:           /sys/class/power/ds2760-battery.*/charge_full
 612 Date:           May 2010
 613 KernelVersion:  2.6.35
 614 Contact:        Daniel Mack <daniel@caiaq.de>
 615 Description:
 616                 This file is writeable and can be used to set the assumed
 617                 battery 'full level'. As batteries age, this value has to be
 618                 amended over time.
 619
 620 What:           /sys/class/power_supply/max14577-charger/device/fast_charge_timer
 621 Date:           October 2014
 622 KernelVersion:  3.18.0
 623 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 624 Description:
 625                 This entry shows and sets the maximum time the max14577
 626                 charger operates in fast-charge mode. When the timer expires
 627                 the device will terminate fast-charge mode (charging current
 628                 will drop to 0 A) and will trigger interrupt.
 629
 630                 Valid values:
 631
 632                 - 5, 6 or 7 (hours),
 633                 - 0: disabled.
 634
 635 What:           /sys/class/power_supply/max77693-charger/device/fast_charge_timer
 636 Date:           January 2015
 637 KernelVersion:  3.19.0
 638 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 639 Description:
 640                 This entry shows and sets the maximum time the max77693
 641                 charger operates in fast-charge mode. When the timer expires
 642                 the device will terminate fast-charge mode (charging current
 643                 will drop to 0 A) and will trigger interrupt.
 644
 645                 Valid values:
 646
 647                 - 4 - 16 (hours), step by 2 (rounded down)
 648                 - 0: disabled.
 649
 650 What:           /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
 651 Date:           January 2015
 652 KernelVersion:  3.19.0
 653 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 654 Description:
 655                 This entry shows and sets the charging current threshold for
 656                 entering top-off charging mode. When charging current in fast
 657                 charge mode drops below this value, the charger will trigger
 658                 interrupt and start top-off charging mode.
 659
 660                 Valid values:
 661
 662                 - 100000 - 200000 (microamps), step by 25000 (rounded down)
 663                 - 200000 - 350000 (microamps), step by 50000 (rounded down)
 664                 - 0: disabled.
 665
 666 What:           /sys/class/power_supply/max77693-charger/device/top_off_timer
 667 Date:           January 2015
 668 KernelVersion:  3.19.0
 669 Contact:        Krzysztof Kozlowski <krzk@kernel.org>
 670 Description:
 671                 This entry shows and sets the maximum time the max77693
 672                 charger operates in top-off charge mode. When the timer expires
 673                 the device will terminate top-off charge mode (charging current
 674                 will drop to 0 A) and will trigger interrupt.
 675
 676                 Valid values:
 677
 678                 - 0 - 70 (minutes), step by 10 (rounded down)
 679
 680 What:           /sys/class/power_supply/bq24257-charger/ovp_voltage
 681 Date:           October 2015
 682 KernelVersion:  4.4.0
 683 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 684 Description:
 685                 This entry configures the overvoltage protection feature of bq24257-
 686                 type charger devices. This feature protects the device and other
 687                 components against damage from overvoltage on the input supply. See
 688                 device datasheet for details.
 689
 690                 Valid values:
 691
 692                 - 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000,
 693                   10500000 (all uV)
 694
 695 What:           /sys/class/power_supply/bq24257-charger/in_dpm_voltage
 696 Date:           October 2015
 697 KernelVersion:  4.4.0
 698 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 699 Description:
 700                 This entry configures the input dynamic power path management voltage of
 701                 bq24257-type charger devices. Once the supply drops to the configured
 702                 voltage, the input current limit is reduced down to prevent the further
 703                 drop of the supply. When the IC enters this mode, the charge current is
 704                 lower than the set value. See device datasheet for details.
 705
 706                 Valid values:
 707
 708                 - 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
 709                   4760000 (all uV)
 710
 711 What:           /sys/class/power_supply/bq24257-charger/high_impedance_enable
 712 Date:           October 2015
 713 KernelVersion:  4.4.0
 714 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 715 Description:
 716                 This entry allows enabling the high-impedance mode of bq24257-type
 717                 charger devices. If enabled, it places the charger IC into low power
 718                 standby mode with the switch mode controller disabled. When disabled,
 719                 the charger operates normally. See device datasheet for details.
 720
 721                 Valid values:
 722
 723                 - 1: enabled
 724                 - 0: disabled
 725
 726 What:           /sys/class/power_supply/bq24257-charger/sysoff_enable
 727 Date:           October 2015
 728 KernelVersion:  4.4.0
 729 Contact:        Andreas Dannenberg <dannenberg@ti.com>
 730 Description:
 731                 This entry allows enabling the sysoff mode of bq24257-type charger
 732                 devices. If enabled and the input is removed, the internal battery FET
 733                 is turned off in order to reduce the leakage from the BAT pin to less
 734                 than 1uA. Note that on some devices/systems this disconnects the battery
 735                 from the system. See device datasheet for details.
 736
 737                 Valid values:
 738
 739                 - 1: enabled
 740                 - 0: disabled
 741
 742 What:           /sys/class/power_supply/<supply_name>/manufacture_year
 743 Date:           January 2020
 744 Contact:        linux-pm@vger.kernel.org
 745 Description:
 746                 Reports the year (following Gregorian calendar) when the device has been
 747                 manufactured.
 748
 749                 Access: Read
 750
 751                 Valid values: Reported as integer
 752
 753 What:           /sys/class/power_supply/<supply_name>/manufacture_month
 754 Date:           January 2020
 755 Contact:        linux-pm@vger.kernel.org
 756 Description:
 757                 Reports the month when the device has been manufactured.
 758
 759                 Access: Read
 760
 761                 Valid values: 1-12
 762
 763 What:           /sys/class/power_supply/<supply_name>/manufacture_day
 764 Date:           January 2020
 765 Contact:        linux-pm@vger.kernel.org
 766 Description:
 767                 Reports the day of month when the device has been manufactured.
 768
 769                 Access: Read
 770                 Valid values: 1-31