1 **General Properties** 1 **General Properties**
2 2
3 What: /sys/class/power_supply/<suppl 3 What: /sys/class/power_supply/<supply_name>/manufacturer
4 Date: May 2007 4 Date: May 2007
5 Contact: linux-pm@vger.kernel.org 5 Contact: linux-pm@vger.kernel.org
6 Description: 6 Description:
7 Reports the name of the device 7 Reports the name of the device manufacturer.
8 8
9 Access: Read 9 Access: Read
10 Valid values: Represented as s 10 Valid values: Represented as string
11 11
12 What: /sys/class/power_supply/<suppl 12 What: /sys/class/power_supply/<supply_name>/model_name
13 Date: May 2007 13 Date: May 2007
14 Contact: linux-pm@vger.kernel.org 14 Contact: linux-pm@vger.kernel.org
15 Description: 15 Description:
16 Reports the name of the device 16 Reports the name of the device model.
17 17
18 Access: Read 18 Access: Read
19 Valid values: Represented as s 19 Valid values: Represented as string
20 20
21 What: /sys/class/power_supply/<suppl 21 What: /sys/class/power_supply/<supply_name>/serial_number
22 Date: January 2008 22 Date: January 2008
23 Contact: linux-pm@vger.kernel.org 23 Contact: linux-pm@vger.kernel.org
24 Description: 24 Description:
25 Reports the serial number of t 25 Reports the serial number of the device.
26 26
27 Access: Read 27 Access: Read
28 Valid values: Represented as s 28 Valid values: Represented as string
29 29
30 What: /sys/class/power_supply/<suppl 30 What: /sys/class/power_supply/<supply_name>/type
31 Date: May 2010 31 Date: May 2010
32 Contact: linux-pm@vger.kernel.org 32 Contact: linux-pm@vger.kernel.org
33 Description: 33 Description:
34 Describes the main type of the 34 Describes the main type of the supply.
35 35
36 Access: Read 36 Access: Read
37 Valid values: "Battery", "UPS" 37 Valid values: "Battery", "UPS", "Mains", "USB", "Wireless"
38 38
39 **Battery and USB properties** 39 **Battery and USB properties**
40 40
41 What: /sys/class/power_supply/<suppl 41 What: /sys/class/power_supply/<supply_name>/current_avg
42 Date: May 2007 42 Date: May 2007
43 Contact: linux-pm@vger.kernel.org 43 Contact: linux-pm@vger.kernel.org
44 Description: 44 Description:
45 Battery: 45 Battery:
46 46
47 Reports an average IBAT curr 47 Reports an average IBAT current reading for the battery, over
48 a fixed period. Normally dev 48 a fixed period. Normally devices will provide a fixed interval
49 in which they average readin 49 in which they average readings to smooth out the reported
50 value. 50 value.
51 51
52 USB: 52 USB:
53 53
54 Reports an average IBUS curr 54 Reports an average IBUS current reading over a fixed period.
55 Normally devices will provid 55 Normally devices will provide a fixed interval in which they
56 average readings to smooth o 56 average readings to smooth out the reported value.
57 57
58 Access: Read 58 Access: Read
59 59
60 Valid values: Represented in m 60 Valid values: Represented in microamps. Negative values are
61 used for discharging batteries 61 used for discharging batteries, positive values for charging
62 batteries and for USB IBUS cur 62 batteries and for USB IBUS current.
63 63
64 What: /sys/class/power_supply/<suppl 64 What: /sys/class/power_supply/<supply_name>/current_max
65 Date: October 2010 65 Date: October 2010
66 Contact: linux-pm@vger.kernel.org 66 Contact: linux-pm@vger.kernel.org
67 Description: 67 Description:
68 Battery: 68 Battery:
69 69
70 Reports the maximum IBAT cur 70 Reports the maximum IBAT current allowed into the battery.
71 71
72 USB: 72 USB:
73 73
74 Reports the maximum IBUS cur 74 Reports the maximum IBUS current the supply can support.
75 75
76 Access: Read 76 Access: Read
77 Valid values: Represented in m 77 Valid values: Represented in microamps
78 78
79 What: /sys/class/power_supply/<suppl 79 What: /sys/class/power_supply/<supply_name>/current_now
80 Date: May 2007 80 Date: May 2007
81 Contact: linux-pm@vger.kernel.org 81 Contact: linux-pm@vger.kernel.org
82 Description: 82 Description:
83 83
84 Battery: 84 Battery:
85 85
86 Reports an instant, single I 86 Reports an instant, single IBAT current reading for the
87 battery. This value is not a 87 battery. This value is not averaged/smoothed.
88 88
89 Access: Read 89 Access: Read
90 90
91 USB: 91 USB:
92 92
93 Reports the IBUS current sup 93 Reports the IBUS current supplied now. This value is generally
94 read-only reporting, unless 94 read-only reporting, unless the 'online' state of the supply
95 is set to be programmable, i 95 is set to be programmable, in which case this value can be set
96 within the reported min/max 96 within the reported min/max range.
97 97
98 Access: Read, Write 98 Access: Read, Write
99 99
100 Valid values: Represented in m 100 Valid values: Represented in microamps. Negative values are
101 used for discharging batteries 101 used for discharging batteries, positive values for charging
102 batteries and for USB IBUS cur 102 batteries and for USB IBUS current.
103 103
104 What: /sys/class/power_supply/<suppl 104 What: /sys/class/power_supply/<supply_name>/temp
105 Date: May 2007 105 Date: May 2007
106 Contact: linux-pm@vger.kernel.org 106 Contact: linux-pm@vger.kernel.org
107 Description: 107 Description:
108 Battery: 108 Battery:
109 109
110 Reports the current TBAT bat 110 Reports the current TBAT battery temperature reading.
111 111
112 USB: 112 USB:
113 113
114 Reports the current supply t 114 Reports the current supply temperature reading. This would
115 normally be the internal tem 115 normally be the internal temperature of the device itself
116 (e.g TJUNC temperature of an 116 (e.g TJUNC temperature of an IC)
117 117
118 Access: Read 118 Access: Read
119 119
120 Valid values: Represented in 1 120 Valid values: Represented in 1/10 Degrees Celsius
121 121
122 What: /sys/class/power_supply/<suppl 122 What: /sys/class/power_supply/<supply_name>/temp_alert_max
123 Date: July 2012 123 Date: July 2012
124 Contact: linux-pm@vger.kernel.org 124 Contact: linux-pm@vger.kernel.org
125 Description: 125 Description:
126 Battery: 126 Battery:
127 127
128 Maximum TBAT temperature tri 128 Maximum TBAT temperature trip-wire value where the supply will
129 notify user-space of the eve 129 notify user-space of the event.
130 130
131 USB: 131 USB:
132 132
133 Maximum supply temperature t 133 Maximum supply temperature trip-wire value where the supply
134 will notify user-space of th 134 will notify user-space of the event.
135 135
136 This is normally used for the 136 This is normally used for the charging scenario where
137 user-space needs to know if th 137 user-space needs to know if the temperature has crossed an
138 upper threshold so it can take 138 upper threshold so it can take appropriate action (e.g. warning
139 user that the temperature is c 139 user that the temperature is critically high, and charging has
140 stopped). 140 stopped).
141 141
142 Access: Read 142 Access: Read
143 143
144 Valid values: Represented in 1 144 Valid values: Represented in 1/10 Degrees Celsius
145 145
146 What: /sys/class/power_supply/<suppl 146 What: /sys/class/power_supply/<supply_name>/temp_alert_min
147 Date: July 2012 147 Date: July 2012
148 Contact: linux-pm@vger.kernel.org 148 Contact: linux-pm@vger.kernel.org
149 Description: 149 Description:
150 150
151 Battery: 151 Battery:
152 152
153 Minimum TBAT temperature tri 153 Minimum TBAT temperature trip-wire value where the supply will
154 notify user-space of the eve 154 notify user-space of the event.
155 155
156 USB: 156 USB:
157 157
158 Minimum supply temperature t 158 Minimum supply temperature trip-wire value where the supply
159 will notify user-space of th 159 will notify user-space of the event.
160 160
161 This is normally used for the 161 This is normally used for the charging scenario where user-space
162 needs to know if the temperatu 162 needs to know if the temperature has crossed a lower threshold
163 so it can take appropriate act 163 so it can take appropriate action (e.g. warning user that
164 temperature level is high, and 164 temperature level is high, and charging current has been
165 reduced accordingly to remedy 165 reduced accordingly to remedy the situation).
166 166
167 Access: Read 167 Access: Read
168 168
169 Valid values: Represented in 1 169 Valid values: Represented in 1/10 Degrees Celsius
170 170
171 What: /sys/class/power_supply/<suppl 171 What: /sys/class/power_supply/<supply_name>/temp_max
172 Date: July 2014 172 Date: July 2014
173 Contact: linux-pm@vger.kernel.org 173 Contact: linux-pm@vger.kernel.org
174 Description: 174 Description:
175 Battery: 175 Battery:
176 176
177 Reports the maximum allowed 177 Reports the maximum allowed TBAT battery temperature for
178 charging. 178 charging.
179 179
180 USB: 180 USB:
181 181
182 Reports the maximum allowed 182 Reports the maximum allowed supply temperature for operation.
183 183
184 Access: Read 184 Access: Read
185 185
186 Valid values: Represented in 1 186 Valid values: Represented in 1/10 Degrees Celsius
187 187
188 What: /sys/class/power_supply/<suppl 188 What: /sys/class/power_supply/<supply_name>/temp_min
189 Date: July 2014 189 Date: July 2014
190 Contact: linux-pm@vger.kernel.org 190 Contact: linux-pm@vger.kernel.org
191 Description: 191 Description:
192 Battery: 192 Battery:
193 193
194 Reports the minimum allowed 194 Reports the minimum allowed TBAT battery temperature for
195 charging. 195 charging.
196 196
197 USB: 197 USB:
198 198
199 Reports the minimum allowed 199 Reports the minimum allowed supply temperature for operation.
200 200
201 Access: Read 201 Access: Read
202 202
203 Valid values: Represented in 1 203 Valid values: Represented in 1/10 Degrees Celsius
204 204
205 What: /sys/class/power_supply/<suppl 205 What: /sys/class/power_supply/<supply_name>/voltage_max,
206 Date: January 2008 206 Date: January 2008
207 Contact: linux-pm@vger.kernel.org 207 Contact: linux-pm@vger.kernel.org
208 Description: 208 Description:
209 Battery: 209 Battery:
210 210
211 Reports the maximum safe VBA 211 Reports the maximum safe VBAT voltage permitted for the
212 battery, during charging. 212 battery, during charging.
213 213
214 USB: 214 USB:
215 215
216 Reports the maximum VBUS vol 216 Reports the maximum VBUS voltage the supply can support.
217 217
218 Access: Read 218 Access: Read
219 219
220 Valid values: Represented in m 220 Valid values: Represented in microvolts
221 221
222 What: /sys/class/power_supply/<suppl 222 What: /sys/class/power_supply/<supply_name>/voltage_min,
223 Date: January 2008 223 Date: January 2008
224 Contact: linux-pm@vger.kernel.org 224 Contact: linux-pm@vger.kernel.org
225 Description: 225 Description:
226 Battery: 226 Battery:
227 227
228 Reports the minimum safe VBA 228 Reports the minimum safe VBAT voltage permitted for the
229 battery, during discharging. 229 battery, during discharging.
230 230
231 USB: 231 USB:
232 232
233 Reports the minimum VBUS vol 233 Reports the minimum VBUS voltage the supply can support.
234 234
235 Access: Read 235 Access: Read
236 236
237 Valid values: Represented in m 237 Valid values: Represented in microvolts
238 238
239 What: /sys/class/power_supply/<suppl 239 What: /sys/class/power_supply/<supply_name>/voltage_now,
240 Date: May 2007 240 Date: May 2007
241 Contact: linux-pm@vger.kernel.org 241 Contact: linux-pm@vger.kernel.org
242 Description: 242 Description:
243 Battery: 243 Battery:
244 244
245 Reports an instant, single V 245 Reports an instant, single VBAT voltage reading for the
246 battery. This value is not a 246 battery. This value is not averaged/smoothed.
247 247
248 Access: Read 248 Access: Read
249 249
250 USB: 250 USB:
251 251
252 Reports the VBUS voltage sup 252 Reports the VBUS voltage supplied now. This value is generally
253 read-only reporting, unless 253 read-only reporting, unless the 'online' state of the supply
254 is set to be programmable, i 254 is set to be programmable, in which case this value can be set
255 within the reported min/max 255 within the reported min/max range.
256 256
257 Access: Read, Write 257 Access: Read, Write
258 258
259 Valid values: Represented in m 259 Valid values: Represented in microvolts
260 260
261 **Battery Properties** 261 **Battery Properties**
262 262
263 What: /sys/class/power_supply/<suppl 263 What: /sys/class/power_supply/<supply_name>/capacity
264 Date: May 2007 264 Date: May 2007
265 Contact: linux-pm@vger.kernel.org 265 Contact: linux-pm@vger.kernel.org
266 Description: 266 Description:
267 Fine grain representation of b 267 Fine grain representation of battery capacity.
268 268
269 Access: Read 269 Access: Read
270 270
271 Valid values: 0 - 100 (percent 271 Valid values: 0 - 100 (percent)
272 272
273 What: /sys/class/power_supply/<suppl 273 What: /sys/class/power_supply/<supply_name>/capacity_alert_max
274 Date: July 2012 274 Date: July 2012
275 Contact: linux-pm@vger.kernel.org 275 Contact: linux-pm@vger.kernel.org
276 Description: 276 Description:
277 Maximum battery capacity trip- 277 Maximum battery capacity trip-wire value where the supply will
278 notify user-space of the event 278 notify user-space of the event. This is normally used for the
279 battery discharging scenario w 279 battery discharging scenario where user-space needs to know the
280 battery has dropped to an uppe 280 battery has dropped to an upper level so it can take
281 appropriate action (e.g. warni 281 appropriate action (e.g. warning user that battery level is
282 low). 282 low).
283 283
284 Access: Read, Write 284 Access: Read, Write
285 285
286 Valid values: 0 - 100 (percent 286 Valid values: 0 - 100 (percent)
287 287
288 What: /sys/class/power_supply/<suppl 288 What: /sys/class/power_supply/<supply_name>/capacity_alert_min
289 Date: July 2012 289 Date: July 2012
290 Contact: linux-pm@vger.kernel.org 290 Contact: linux-pm@vger.kernel.org
291 Description: 291 Description:
292 Minimum battery capacity trip- 292 Minimum battery capacity trip-wire value where the supply will
293 notify user-space of the event 293 notify user-space of the event. This is normally used for the
294 battery discharging scenario w 294 battery discharging scenario where user-space needs to know the
295 battery has dropped to a lower 295 battery has dropped to a lower level so it can take
296 appropriate action (e.g. warni 296 appropriate action (e.g. warning user that battery level is
297 critically low). 297 critically low).
298 298
299 Access: Read, Write 299 Access: Read, Write
300 300
301 Valid values: 0 - 100 (percent 301 Valid values: 0 - 100 (percent)
302 302
303 What: /sys/class/power_supply/<suppl 303 What: /sys/class/power_supply/<supply_name>/capacity_error_margin
304 Date: April 2019 304 Date: April 2019
305 Contact: linux-pm@vger.kernel.org 305 Contact: linux-pm@vger.kernel.org
306 Description: 306 Description:
307 Battery capacity measurement b 307 Battery capacity measurement becomes unreliable without
308 recalibration. This values pro 308 recalibration. This values provides the maximum error
309 margin expected to exist by th 309 margin expected to exist by the fuel gauge in percent.
310 Values close to 0% will be ret 310 Values close to 0% will be returned after (re-)calibration
311 has happened. Over time the er 311 has happened. Over time the error margin will increase.
312 100% means, that the capacity 312 100% means, that the capacity related values are basically
313 completely useless. 313 completely useless.
314 314
315 Access: Read 315 Access: Read
316 316
317 Valid values: 0 - 100 (percent 317 Valid values: 0 - 100 (percent)
318 318
319 What: /sys/class/power_supply/<suppl 319 What: /sys/class/power_supply/<supply_name>/capacity_level
320 Date: June 2009 320 Date: June 2009
321 Contact: linux-pm@vger.kernel.org 321 Contact: linux-pm@vger.kernel.org
322 Description: 322 Description:
323 Coarse representation of batte 323 Coarse representation of battery capacity.
324 324
325 Access: Read 325 Access: Read
326 326
327 Valid values: 327 Valid values:
328 "Unknown", "Crit 328 "Unknown", "Critical", "Low", "Normal", "High",
329 "Full" 329 "Full"
330 330
331 What: /sys/class/power_supply/<suppl 331 What: /sys/class/power_supply/<supply_name>/charge_control_limit
332 Date: Oct 2012 332 Date: Oct 2012
333 Contact: linux-pm@vger.kernel.org 333 Contact: linux-pm@vger.kernel.org
334 Description: 334 Description:
335 Maximum allowable charging cur 335 Maximum allowable charging current. Used for charge rate
336 throttling for thermal cooling 336 throttling for thermal cooling or improving battery health.
337 337
338 Access: Read, Write 338 Access: Read, Write
339 339
340 Valid values: Represented in m 340 Valid values: Represented in microamps
341 341
342 What: /sys/class/power_supply/<suppl 342 What: /sys/class/power_supply/<supply_name>/charge_control_limit_max
343 Date: Oct 2012 343 Date: Oct 2012
344 Contact: linux-pm@vger.kernel.org 344 Contact: linux-pm@vger.kernel.org
345 Description: 345 Description:
346 Maximum legal value for the ch 346 Maximum legal value for the charge_control_limit property.
347 347
348 Access: Read 348 Access: Read
349 349
350 Valid values: Represented in m 350 Valid values: Represented in microamps
351 351
352 What: /sys/class/power_supply/<suppl 352 What: /sys/class/power_supply/<supply_name>/charge_control_start_threshold
353 Date: April 2019 353 Date: April 2019
354 Contact: linux-pm@vger.kernel.org 354 Contact: linux-pm@vger.kernel.org
355 Description: 355 Description:
356 Represents a battery percentag 356 Represents a battery percentage level, below which charging will
357 begin. 357 begin.
358 358
359 Access: Read, Write 359 Access: Read, Write
360 Valid values: 0 - 100 (percent 360 Valid values: 0 - 100 (percent)
361 361
362 What: /sys/class/power_supply/<suppl 362 What: /sys/class/power_supply/<supply_name>/charge_control_end_threshold
363 Date: April 2019 363 Date: April 2019
364 Contact: linux-pm@vger.kernel.org 364 Contact: linux-pm@vger.kernel.org
365 Description: 365 Description:
366 Represents a battery percentag 366 Represents a battery percentage level, above which charging will
367 stop. Not all hardware is capa !! 367 stop.
368 percentage. Drivers will round <<
369 supported value. Reading back <<
370 threshold set by the driver. <<
371 368
372 Access: Read, Write 369 Access: Read, Write
373 370
374 Valid values: 0 - 100 (percent 371 Valid values: 0 - 100 (percent)
375 372
376 What: /sys/class/power_supply/<suppl 373 What: /sys/class/power_supply/<supply_name>/charge_type
377 Date: July 2009 374 Date: July 2009
378 Contact: linux-pm@vger.kernel.org 375 Contact: linux-pm@vger.kernel.org
379 Description: 376 Description:
380 Select the charging algorithm !! 377 Represents the type of charging currently being applied to the
381 !! 378 battery. "Trickle", "Fast", and "Standard" all mean different
382 Standard: !! 379 charging speeds. "Adaptive" means that the charger uses some
383 Fully charge the batte !! 380 algorithm to adjust the charge rate dynamically, without
384 Fast: !! 381 any user configuration required. "Custom" means that the charger
385 Quickly charge the bat !! 382 uses the charge_control_* properties as configuration for some
386 technology. This is ty !! 383 different algorithm.
387 than standard charging <<
388 Trickle: <<
389 Users who primarily op <<
390 plugged into an extern <<
391 battery life with this <<
392 call this "Primarily A <<
393 Adaptive: <<
394 Automatically optimize <<
395 on typical usage patte <<
396 Custom: <<
397 Use the charge_control <<
398 when to start and stop <<
399 can use this to drasti <<
400 Long Life: <<
401 The charger reduces it <<
402 prolong the battery he <<
403 Bypass: <<
404 The charger bypasses t <<
405 integrated converter a <<
406 adaptor to perform the <<
407 384
408 Access: Read, Write 385 Access: Read, Write
409 386
410 Valid values: 387 Valid values:
411 "Unknown", "N/A" 388 "Unknown", "N/A", "Trickle", "Fast", "Standard",
412 "Adaptive", "Cus !! 389 "Adaptive", "Custom"
413 390
414 What: /sys/class/power_supply/<suppl 391 What: /sys/class/power_supply/<supply_name>/charge_term_current
415 Date: July 2014 392 Date: July 2014
416 Contact: linux-pm@vger.kernel.org 393 Contact: linux-pm@vger.kernel.org
417 Description: 394 Description:
418 Reports the charging current v 395 Reports the charging current value which is used to determine
419 when the battery is considered 396 when the battery is considered full and charging should end.
420 397
421 Access: Read 398 Access: Read
422 399
423 Valid values: Represented in m 400 Valid values: Represented in microamps
424 401
425 What: /sys/class/power_supply/<suppl 402 What: /sys/class/power_supply/<supply_name>/health
426 Date: May 2007 403 Date: May 2007
427 Contact: linux-pm@vger.kernel.org 404 Contact: linux-pm@vger.kernel.org
428 Description: 405 Description:
429 Reports the health of the batt 406 Reports the health of the battery or battery side of charger
430 functionality. 407 functionality.
431 408
432 Access: Read 409 Access: Read
433 410
434 Valid values: 411 Valid values:
435 "Unknown", "Good 412 "Unknown", "Good", "Overheat", "Dead",
436 "Over voltage", 413 "Over voltage", "Unspecified failure", "Cold",
437 "Watchdog timer 414 "Watchdog timer expire", "Safety timer expire",
438 "Over current", 415 "Over current", "Calibration required", "Warm",
439 "Cool", "Hot", " !! 416 "Cool", "Hot"
440 417
441 What: /sys/class/power_supply/<suppl 418 What: /sys/class/power_supply/<supply_name>/precharge_current
442 Date: June 2017 419 Date: June 2017
443 Contact: linux-pm@vger.kernel.org 420 Contact: linux-pm@vger.kernel.org
444 Description: 421 Description:
445 Reports the charging current a 422 Reports the charging current applied during pre-charging phase
446 for a battery charge cycle. 423 for a battery charge cycle.
447 424
448 Access: Read 425 Access: Read
449 426
450 Valid values: Represented in m 427 Valid values: Represented in microamps
451 428
452 What: /sys/class/power_supply/<suppl 429 What: /sys/class/power_supply/<supply_name>/present
453 Date: May 2007 430 Date: May 2007
454 Contact: linux-pm@vger.kernel.org 431 Contact: linux-pm@vger.kernel.org
455 Description: 432 Description:
456 Reports whether a battery is p !! 433 Reports whether a battery is present or not in the system.
457 property does not exist, the b <<
458 434
459 Access: Read 435 Access: Read
460 436
461 Valid values: 437 Valid values:
462 438
463 == ======= 439 == =======
464 0: Absent 440 0: Absent
465 1: Present 441 1: Present
466 == ======= 442 == =======
467 443
468 What: /sys/class/power_supply/<suppl 444 What: /sys/class/power_supply/<supply_name>/status
469 Date: May 2007 445 Date: May 2007
470 Contact: linux-pm@vger.kernel.org 446 Contact: linux-pm@vger.kernel.org
471 Description: 447 Description:
472 Represents the charging status 448 Represents the charging status of the battery. Normally this
473 is read-only reporting althoug 449 is read-only reporting although for some supplies this can be
474 used to enable/disable chargin 450 used to enable/disable charging to the battery.
475 451
476 Access: Read, Write 452 Access: Read, Write
477 453
478 Valid values: 454 Valid values:
479 "Unknown", "Char 455 "Unknown", "Charging", "Discharging",
480 "Not charging", 456 "Not charging", "Full"
481 457
482 What: /sys/class/power_supply/<suppl <<
483 Date: November 2021 <<
484 Contact: linux-pm@vger.kernel.org <<
485 Description: <<
486 Represents the charging behavi <<
487 <<
488 Access: Read, Write <<
489 <<
490 Valid values: <<
491 ================ ===== <<
492 auto: Charg <<
493 inhibit-charge: Do no <<
494 force-discharge: Force <<
495 ================ ===== <<
496 <<
497 What: /sys/class/power_supply/<suppl 458 What: /sys/class/power_supply/<supply_name>/technology
498 Date: May 2007 459 Date: May 2007
499 Contact: linux-pm@vger.kernel.org 460 Contact: linux-pm@vger.kernel.org
500 Description: 461 Description:
501 Describes the battery technolo 462 Describes the battery technology supported by the supply.
502 463
503 Access: Read 464 Access: Read
504 465
505 Valid values: 466 Valid values:
506 "Unknown", "NiMH 467 "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
507 "NiCd", "LiMn" 468 "NiCd", "LiMn"
508 469
509 470
510 What: /sys/class/power_supply/<suppl 471 What: /sys/class/power_supply/<supply_name>/voltage_avg,
511 Date: May 2007 472 Date: May 2007
512 Contact: linux-pm@vger.kernel.org 473 Contact: linux-pm@vger.kernel.org
513 Description: 474 Description:
514 Reports an average VBAT voltag 475 Reports an average VBAT voltage reading for the battery, over a
515 fixed period. Normally devices 476 fixed period. Normally devices will provide a fixed interval in
516 which they average readings to 477 which they average readings to smooth out the reported value.
517 478
518 Access: Read 479 Access: Read
519 480
520 Valid values: Represented in m 481 Valid values: Represented in microvolts
521 482
522 What: /sys/class/power_supply/<suppl <<
523 Date: January 2010 <<
524 Contact: linux-pm@vger.kernel.org <<
525 Description: <<
526 Reports the number of full cha <<
527 battery has undergone. <<
528 <<
529 Access: Read <<
530 <<
531 Valid values: <<
532 Integer > 0: represent <<
533 Integer = 0: cycle_cou <<
534 <<
535 **USB Properties** 483 **USB Properties**
536 484
537 What: /sys/class/power_supply/<suppl 485 What: /sys/class/power_supply/<supply_name>/input_current_limit
538 Date: July 2014 486 Date: July 2014
539 Contact: linux-pm@vger.kernel.org 487 Contact: linux-pm@vger.kernel.org
540 Description: 488 Description:
541 Details the incoming IBUS curr 489 Details the incoming IBUS current limit currently set in the
542 supply. Normally this is confi 490 supply. Normally this is configured based on the type of
543 connection made (e.g. A config 491 connection made (e.g. A configured SDP should output a maximum
544 of 500mA so the input current 492 of 500mA so the input current limit is set to the same value).
545 Use preferably input_power_lim 493 Use preferably input_power_limit, and for problems that can be
546 solved using power limit use i 494 solved using power limit use input_current_limit.
547 495
548 Access: Read, Write 496 Access: Read, Write
549 497
550 Valid values: Represented in m 498 Valid values: Represented in microamps
551 499
552 What: /sys/class/power_supply/<suppl 500 What: /sys/class/power_supply/<supply_name>/input_voltage_limit
553 Date: May 2019 501 Date: May 2019
554 Contact: linux-pm@vger.kernel.org 502 Contact: linux-pm@vger.kernel.org
555 Description: 503 Description:
556 This entry configures the inco 504 This entry configures the incoming VBUS voltage limit currently
557 set in the supply. Normally th 505 set in the supply. Normally this is configured based on
558 system-level knowledge or user 506 system-level knowledge or user input (e.g. This is part of the
559 Pixel C's thermal management s 507 Pixel C's thermal management strategy to effectively limit the
560 input power to 5V when the scr 508 input power to 5V when the screen is on to meet Google's skin
561 temperature targets). Note tha 509 temperature targets). Note that this feature should not be
562 used for safety critical thing 510 used for safety critical things.
563 Use preferably input_power_lim 511 Use preferably input_power_limit, and for problems that can be
564 solved using power limit use i 512 solved using power limit use input_voltage_limit.
565 513
566 Access: Read, Write 514 Access: Read, Write
567 515
568 Valid values: Represented in m 516 Valid values: Represented in microvolts
569 517
570 What: /sys/class/power_supply/<suppl 518 What: /sys/class/power_supply/<supply_name>/input_power_limit
571 Date: May 2019 519 Date: May 2019
572 Contact: linux-pm@vger.kernel.org 520 Contact: linux-pm@vger.kernel.org
573 Description: 521 Description:
574 This entry configures the inco 522 This entry configures the incoming power limit currently set
575 in the supply. Normally this i 523 in the supply. Normally this is configured based on
576 system-level knowledge or user 524 system-level knowledge or user input. Use preferably this
577 feature to limit the incoming 525 feature to limit the incoming power and use current/voltage
578 limit only for problems that c 526 limit only for problems that can be solved using power limit.
579 527
580 Access: Read, Write 528 Access: Read, Write
581 529
582 Valid values: Represented in m 530 Valid values: Represented in microwatts
583 531
584 What: /sys/class/power_supply/<suppl 532 What: /sys/class/power_supply/<supply_name>/online,
585 Date: May 2007 533 Date: May 2007
586 Contact: linux-pm@vger.kernel.org 534 Contact: linux-pm@vger.kernel.org
587 Description: 535 Description:
588 Indicates if VBUS is present f 536 Indicates if VBUS is present for the supply. When the supply is
589 online, and the supply allows 537 online, and the supply allows it, then it's possible to switch
590 between online states (e.g. Fi 538 between online states (e.g. Fixed -> Programmable for a PD_PPS
591 USB supply so voltage and curr 539 USB supply so voltage and current can be controlled).
592 540
593 Access: Read, Write 541 Access: Read, Write
594 542
595 Valid values: 543 Valid values:
596 544
597 == =================== 545 == ==================================================
598 0: Offline 546 0: Offline
599 1: Online Fixed - Fixe 547 1: Online Fixed - Fixed Voltage Supply
600 2: Online Programmable 548 2: Online Programmable - Programmable Voltage Supply
601 == =================== 549 == ==================================================
602 550
603 What: /sys/class/power_supply/<suppl 551 What: /sys/class/power_supply/<supply_name>/usb_type
604 Date: March 2018 552 Date: March 2018
605 Contact: linux-pm@vger.kernel.org 553 Contact: linux-pm@vger.kernel.org
606 Description: 554 Description:
607 Reports what type of USB conne 555 Reports what type of USB connection is currently active for
608 the supply, for example it can 556 the supply, for example it can show if USB-PD capable source
609 is attached. 557 is attached.
610 558
611 Access: For power-supplies whi !! 559 Access: Read-Only
612 as battery charger chips, this <<
613 the connected USB power source <<
614 <<
615 For power-supplies which act a <<
616 e.g. the UCS1002 USB Port Powe <<
617 560
618 Valid values: 561 Valid values:
619 "Unknown", "SDP" 562 "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
620 "PD_DRP", "PD_PP 563 "PD_DRP", "PD_PPS", "BrickID"
621 564
622 **Device Specific Properties** 565 **Device Specific Properties**
623 566
624 What: /sys/class/power/ds2760-batter 567 What: /sys/class/power/ds2760-battery.*/charge_now
625 Date: May 2010 568 Date: May 2010
626 KernelVersion: 2.6.35 569 KernelVersion: 2.6.35
627 Contact: Daniel Mack <daniel@caiaq.de> 570 Contact: Daniel Mack <daniel@caiaq.de>
628 Description: 571 Description:
629 This file is writeable and can 572 This file is writeable and can be used to set the current
630 coloumb counter value inside t 573 coloumb counter value inside the battery monitor chip. This
631 is needed for unavoidable corr 574 is needed for unavoidable corrections of aging batteries.
632 A userspace daemon can monitor 575 A userspace daemon can monitor the battery charging logic
633 and once the counter drops out 576 and once the counter drops out of considerable bounds, take
634 appropriate action. 577 appropriate action.
635 578
636 What: /sys/class/power/ds2760-batter 579 What: /sys/class/power/ds2760-battery.*/charge_full
637 Date: May 2010 580 Date: May 2010
638 KernelVersion: 2.6.35 581 KernelVersion: 2.6.35
639 Contact: Daniel Mack <daniel@caiaq.de> 582 Contact: Daniel Mack <daniel@caiaq.de>
640 Description: 583 Description:
641 This file is writeable and can 584 This file is writeable and can be used to set the assumed
642 battery 'full level'. As batte 585 battery 'full level'. As batteries age, this value has to be
643 amended over time. 586 amended over time.
644 587
645 What: /sys/class/power_supply/max145 588 What: /sys/class/power_supply/max14577-charger/device/fast_charge_timer
646 Date: October 2014 589 Date: October 2014
647 KernelVersion: 3.18.0 590 KernelVersion: 3.18.0
648 Contact: Krzysztof Kozlowski <krzk@kerne 591 Contact: Krzysztof Kozlowski <krzk@kernel.org>
649 Description: 592 Description:
650 This entry shows and sets the 593 This entry shows and sets the maximum time the max14577
651 charger operates in fast-charg 594 charger operates in fast-charge mode. When the timer expires
652 the device will terminate fast 595 the device will terminate fast-charge mode (charging current
653 will drop to 0 A) and will tri 596 will drop to 0 A) and will trigger interrupt.
654 597
655 Valid values: 598 Valid values:
656 599
657 - 5, 6 or 7 (hours), 600 - 5, 6 or 7 (hours),
658 - 0: disabled. 601 - 0: disabled.
659 602
660 What: /sys/class/power_supply/max776 603 What: /sys/class/power_supply/max77693-charger/device/fast_charge_timer
661 Date: January 2015 604 Date: January 2015
662 KernelVersion: 3.19.0 605 KernelVersion: 3.19.0
663 Contact: Krzysztof Kozlowski <krzk@kerne 606 Contact: Krzysztof Kozlowski <krzk@kernel.org>
664 Description: 607 Description:
665 This entry shows and sets the 608 This entry shows and sets the maximum time the max77693
666 charger operates in fast-charg 609 charger operates in fast-charge mode. When the timer expires
667 the device will terminate fast 610 the device will terminate fast-charge mode (charging current
668 will drop to 0 A) and will tri 611 will drop to 0 A) and will trigger interrupt.
669 612
670 Valid values: 613 Valid values:
671 614
672 - 4 - 16 (hours), step by 2 (r 615 - 4 - 16 (hours), step by 2 (rounded down)
673 - 0: disabled. 616 - 0: disabled.
674 617
675 What: /sys/class/power_supply/max776 618 What: /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
676 Date: January 2015 619 Date: January 2015
677 KernelVersion: 3.19.0 620 KernelVersion: 3.19.0
678 Contact: Krzysztof Kozlowski <krzk@kerne 621 Contact: Krzysztof Kozlowski <krzk@kernel.org>
679 Description: 622 Description:
680 This entry shows and sets the 623 This entry shows and sets the charging current threshold for
681 entering top-off charging mode 624 entering top-off charging mode. When charging current in fast
682 charge mode drops below this v 625 charge mode drops below this value, the charger will trigger
683 interrupt and start top-off ch 626 interrupt and start top-off charging mode.
684 627
685 Valid values: 628 Valid values:
686 629
687 - 100000 - 200000 (microamps), 630 - 100000 - 200000 (microamps), step by 25000 (rounded down)
688 - 200000 - 350000 (microamps), 631 - 200000 - 350000 (microamps), step by 50000 (rounded down)
689 - 0: disabled. 632 - 0: disabled.
690 633
691 What: /sys/class/power_supply/max776 634 What: /sys/class/power_supply/max77693-charger/device/top_off_timer
692 Date: January 2015 635 Date: January 2015
693 KernelVersion: 3.19.0 636 KernelVersion: 3.19.0
694 Contact: Krzysztof Kozlowski <krzk@kerne 637 Contact: Krzysztof Kozlowski <krzk@kernel.org>
695 Description: 638 Description:
696 This entry shows and sets the 639 This entry shows and sets the maximum time the max77693
697 charger operates in top-off ch 640 charger operates in top-off charge mode. When the timer expires
698 the device will terminate top- 641 the device will terminate top-off charge mode (charging current
699 will drop to 0 A) and will tri 642 will drop to 0 A) and will trigger interrupt.
700 643
701 Valid values: 644 Valid values:
702 645
703 - 0 - 70 (minutes), step by 10 646 - 0 - 70 (minutes), step by 10 (rounded down)
704 647
705 What: /sys/class/power_supply/bq2425 648 What: /sys/class/power_supply/bq24257-charger/ovp_voltage
706 Date: October 2015 649 Date: October 2015
707 KernelVersion: 4.4.0 650 KernelVersion: 4.4.0
708 Contact: Andreas Dannenberg <dannenberg@ 651 Contact: Andreas Dannenberg <dannenberg@ti.com>
709 Description: 652 Description:
710 This entry configures the over 653 This entry configures the overvoltage protection feature of bq24257-
711 type charger devices. This fea 654 type charger devices. This feature protects the device and other
712 components against damage from 655 components against damage from overvoltage on the input supply. See
713 device datasheet for details. 656 device datasheet for details.
714 657
715 Valid values: 658 Valid values:
716 659
717 - 6000000, 6500000, 7000000, 8 660 - 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000,
718 10500000 (all uV) 661 10500000 (all uV)
719 662
720 What: /sys/class/power_supply/bq2425 663 What: /sys/class/power_supply/bq24257-charger/in_dpm_voltage
721 Date: October 2015 664 Date: October 2015
722 KernelVersion: 4.4.0 665 KernelVersion: 4.4.0
723 Contact: Andreas Dannenberg <dannenberg@ 666 Contact: Andreas Dannenberg <dannenberg@ti.com>
724 Description: 667 Description:
725 This entry configures the inpu 668 This entry configures the input dynamic power path management voltage of
726 bq24257-type charger devices. 669 bq24257-type charger devices. Once the supply drops to the configured
727 voltage, the input current lim 670 voltage, the input current limit is reduced down to prevent the further
728 drop of the supply. When the I 671 drop of the supply. When the IC enters this mode, the charge current is
729 lower than the set value. See 672 lower than the set value. See device datasheet for details.
730 673
731 Valid values: 674 Valid values:
732 675
733 - 4200000, 4280000, 4360000, 4 676 - 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
734 4760000 (all uV) 677 4760000 (all uV)
735 678
736 What: /sys/class/power_supply/bq2425 679 What: /sys/class/power_supply/bq24257-charger/high_impedance_enable
737 Date: October 2015 680 Date: October 2015
738 KernelVersion: 4.4.0 681 KernelVersion: 4.4.0
739 Contact: Andreas Dannenberg <dannenberg@ 682 Contact: Andreas Dannenberg <dannenberg@ti.com>
740 Description: 683 Description:
741 This entry allows enabling the 684 This entry allows enabling the high-impedance mode of bq24257-type
742 charger devices. If enabled, i 685 charger devices. If enabled, it places the charger IC into low power
743 standby mode with the switch m 686 standby mode with the switch mode controller disabled. When disabled,
744 the charger operates normally. 687 the charger operates normally. See device datasheet for details.
745 688
746 Valid values: 689 Valid values:
747 690
748 - 1: enabled 691 - 1: enabled
749 - 0: disabled 692 - 0: disabled
750 693
751 What: /sys/class/power_supply/bq2425 694 What: /sys/class/power_supply/bq24257-charger/sysoff_enable
752 Date: October 2015 695 Date: October 2015
753 KernelVersion: 4.4.0 696 KernelVersion: 4.4.0
754 Contact: Andreas Dannenberg <dannenberg@ 697 Contact: Andreas Dannenberg <dannenberg@ti.com>
755 Description: 698 Description:
756 This entry allows enabling the 699 This entry allows enabling the sysoff mode of bq24257-type charger
757 devices. If enabled and the in 700 devices. If enabled and the input is removed, the internal battery FET
758 is turned off in order to redu 701 is turned off in order to reduce the leakage from the BAT pin to less
759 than 1uA. Note that on some de 702 than 1uA. Note that on some devices/systems this disconnects the battery
760 from the system. See device da 703 from the system. See device datasheet for details.
761 704
762 Valid values: 705 Valid values:
763 706
764 - 1: enabled 707 - 1: enabled
765 - 0: disabled 708 - 0: disabled
766 709
767 What: /sys/class/power_supply/<suppl 710 What: /sys/class/power_supply/<supply_name>/manufacture_year
768 Date: January 2020 711 Date: January 2020
769 Contact: linux-pm@vger.kernel.org 712 Contact: linux-pm@vger.kernel.org
770 Description: 713 Description:
771 Reports the year (following Gr 714 Reports the year (following Gregorian calendar) when the device has been
772 manufactured. 715 manufactured.
773 716
774 Access: Read 717 Access: Read
775 718
776 Valid values: Reported as inte 719 Valid values: Reported as integer
777 720
778 What: /sys/class/power_supply/<suppl 721 What: /sys/class/power_supply/<supply_name>/manufacture_month
779 Date: January 2020 722 Date: January 2020
780 Contact: linux-pm@vger.kernel.org 723 Contact: linux-pm@vger.kernel.org
781 Description: 724 Description:
782 Reports the month when the dev 725 Reports the month when the device has been manufactured.
783 726
784 Access: Read 727 Access: Read
785 728
786 Valid values: 1-12 729 Valid values: 1-12
787 730
788 What: /sys/class/power_supply/<suppl 731 What: /sys/class/power_supply/<supply_name>/manufacture_day
789 Date: January 2020 732 Date: January 2020
790 Contact: linux-pm@vger.kernel.org 733 Contact: linux-pm@vger.kernel.org
791 Description: 734 Description:
792 Reports the day of month when 735 Reports the day of month when the device has been manufactured.
793 736
794 Access: Read 737 Access: Read
795 Valid values: 1-31 738 Valid values: 1-31
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