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