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. Not all hardware is capable of setting this to an arbitrary
368 percentage. Drivers will round 368 percentage. Drivers will round written values to the nearest
369 supported value. Reading back 369 supported value. Reading back the value will show the actual
370 threshold set by the driver. 370 threshold set by the driver.
371 371
372 Access: Read, Write 372 Access: Read, Write
373 373
374 Valid values: 0 - 100 (percent 374 Valid values: 0 - 100 (percent)
375 375
376 What: /sys/class/power_supply/<suppl 376 What: /sys/class/power_supply/<supply_name>/charge_type
377 Date: July 2009 377 Date: July 2009
378 Contact: linux-pm@vger.kernel.org 378 Contact: linux-pm@vger.kernel.org
379 Description: 379 Description:
380 Select the charging algorithm !! 380 Represents the type of charging currently being applied to the
381 !! 381 battery. "Trickle", "Fast", and "Standard" all mean different
382 Standard: !! 382 charging speeds. "Adaptive" means that the charger uses some
383 Fully charge the batte !! 383 algorithm to adjust the charge rate dynamically, without
384 Fast: !! 384 any user configuration required. "Custom" means that the charger
385 Quickly charge the bat !! 385 uses the charge_control_* properties as configuration for some
386 technology. This is ty !! 386 different algorithm. "Long Life" means the charger reduces its
387 than standard charging !! 387 charging rate in order to prolong the battery health. "Bypass"
388 Trickle: !! 388 means the charger bypasses the charging path around the
389 Users who primarily op !! 389 integrated converter allowing for a "smart" wall adaptor to
390 plugged into an extern !! 390 perform the power conversion externally.
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 <<
407 391
408 Access: Read, Write 392 Access: Read, Write
409 393
410 Valid values: 394 Valid values:
411 "Unknown", "N/A" 395 "Unknown", "N/A", "Trickle", "Fast", "Standard",
412 "Adaptive", "Cus 396 "Adaptive", "Custom", "Long Life", "Bypass"
413 397
414 What: /sys/class/power_supply/<suppl 398 What: /sys/class/power_supply/<supply_name>/charge_term_current
415 Date: July 2014 399 Date: July 2014
416 Contact: linux-pm@vger.kernel.org 400 Contact: linux-pm@vger.kernel.org
417 Description: 401 Description:
418 Reports the charging current v 402 Reports the charging current value which is used to determine
419 when the battery is considered 403 when the battery is considered full and charging should end.
420 404
421 Access: Read 405 Access: Read
422 406
423 Valid values: Represented in m 407 Valid values: Represented in microamps
424 408
425 What: /sys/class/power_supply/<suppl 409 What: /sys/class/power_supply/<supply_name>/health
426 Date: May 2007 410 Date: May 2007
427 Contact: linux-pm@vger.kernel.org 411 Contact: linux-pm@vger.kernel.org
428 Description: 412 Description:
429 Reports the health of the batt 413 Reports the health of the battery or battery side of charger
430 functionality. 414 functionality.
431 415
432 Access: Read 416 Access: Read
433 417
434 Valid values: 418 Valid values:
435 "Unknown", "Good 419 "Unknown", "Good", "Overheat", "Dead",
436 "Over voltage", 420 "Over voltage", "Unspecified failure", "Cold",
437 "Watchdog timer 421 "Watchdog timer expire", "Safety timer expire",
438 "Over current", 422 "Over current", "Calibration required", "Warm",
439 "Cool", "Hot", " 423 "Cool", "Hot", "No battery"
440 424
441 What: /sys/class/power_supply/<suppl 425 What: /sys/class/power_supply/<supply_name>/precharge_current
442 Date: June 2017 426 Date: June 2017
443 Contact: linux-pm@vger.kernel.org 427 Contact: linux-pm@vger.kernel.org
444 Description: 428 Description:
445 Reports the charging current a 429 Reports the charging current applied during pre-charging phase
446 for a battery charge cycle. 430 for a battery charge cycle.
447 431
448 Access: Read 432 Access: Read
449 433
450 Valid values: Represented in m 434 Valid values: Represented in microamps
451 435
452 What: /sys/class/power_supply/<suppl 436 What: /sys/class/power_supply/<supply_name>/present
453 Date: May 2007 437 Date: May 2007
454 Contact: linux-pm@vger.kernel.org 438 Contact: linux-pm@vger.kernel.org
455 Description: 439 Description:
456 Reports whether a battery is p !! 440 Reports whether a battery is present or not in the system.
457 property does not exist, the b <<
458 441
459 Access: Read 442 Access: Read
460 443
461 Valid values: 444 Valid values:
462 445
463 == ======= 446 == =======
464 0: Absent 447 0: Absent
465 1: Present 448 1: Present
466 == ======= 449 == =======
467 450
468 What: /sys/class/power_supply/<suppl 451 What: /sys/class/power_supply/<supply_name>/status
469 Date: May 2007 452 Date: May 2007
470 Contact: linux-pm@vger.kernel.org 453 Contact: linux-pm@vger.kernel.org
471 Description: 454 Description:
472 Represents the charging status 455 Represents the charging status of the battery. Normally this
473 is read-only reporting althoug 456 is read-only reporting although for some supplies this can be
474 used to enable/disable chargin 457 used to enable/disable charging to the battery.
475 458
476 Access: Read, Write 459 Access: Read, Write
477 460
478 Valid values: 461 Valid values:
479 "Unknown", "Char 462 "Unknown", "Charging", "Discharging",
480 "Not charging", 463 "Not charging", "Full"
481 464
482 What: /sys/class/power_supply/<suppl 465 What: /sys/class/power_supply/<supply_name>/charge_behaviour
483 Date: November 2021 466 Date: November 2021
484 Contact: linux-pm@vger.kernel.org 467 Contact: linux-pm@vger.kernel.org
485 Description: 468 Description:
486 Represents the charging behavi 469 Represents the charging behaviour.
487 470
488 Access: Read, Write 471 Access: Read, Write
489 472
490 Valid values: 473 Valid values:
491 ================ ===== 474 ================ ====================================
492 auto: Charg 475 auto: Charge normally, respect thresholds
493 inhibit-charge: Do no 476 inhibit-charge: Do not charge while AC is attached
494 force-discharge: Force 477 force-discharge: Force discharge while AC is attached
495 ================ ===== 478 ================ ====================================
496 479
497 What: /sys/class/power_supply/<suppl 480 What: /sys/class/power_supply/<supply_name>/technology
498 Date: May 2007 481 Date: May 2007
499 Contact: linux-pm@vger.kernel.org 482 Contact: linux-pm@vger.kernel.org
500 Description: 483 Description:
501 Describes the battery technolo 484 Describes the battery technology supported by the supply.
502 485
503 Access: Read 486 Access: Read
504 487
505 Valid values: 488 Valid values:
506 "Unknown", "NiMH 489 "Unknown", "NiMH", "Li-ion", "Li-poly", "LiFe",
507 "NiCd", "LiMn" 490 "NiCd", "LiMn"
508 491
509 492
510 What: /sys/class/power_supply/<suppl 493 What: /sys/class/power_supply/<supply_name>/voltage_avg,
511 Date: May 2007 494 Date: May 2007
512 Contact: linux-pm@vger.kernel.org 495 Contact: linux-pm@vger.kernel.org
513 Description: 496 Description:
514 Reports an average VBAT voltag 497 Reports an average VBAT voltage reading for the battery, over a
515 fixed period. Normally devices 498 fixed period. Normally devices will provide a fixed interval in
516 which they average readings to 499 which they average readings to smooth out the reported value.
517 500
518 Access: Read 501 Access: Read
519 502
520 Valid values: Represented in m 503 Valid values: Represented in microvolts
521 504
522 What: /sys/class/power_supply/<suppl 505 What: /sys/class/power_supply/<supply_name>/cycle_count
523 Date: January 2010 506 Date: January 2010
524 Contact: linux-pm@vger.kernel.org 507 Contact: linux-pm@vger.kernel.org
525 Description: 508 Description:
526 Reports the number of full cha 509 Reports the number of full charge + discharge cycles the
527 battery has undergone. 510 battery has undergone.
528 511
529 Access: Read 512 Access: Read
530 513
531 Valid values: 514 Valid values:
532 Integer > 0: represent 515 Integer > 0: representing full cycles
533 Integer = 0: cycle_cou 516 Integer = 0: cycle_count info is not available
534 517
535 **USB Properties** 518 **USB Properties**
536 519
537 What: /sys/class/power_supply/<suppl 520 What: /sys/class/power_supply/<supply_name>/input_current_limit
538 Date: July 2014 521 Date: July 2014
539 Contact: linux-pm@vger.kernel.org 522 Contact: linux-pm@vger.kernel.org
540 Description: 523 Description:
541 Details the incoming IBUS curr 524 Details the incoming IBUS current limit currently set in the
542 supply. Normally this is confi 525 supply. Normally this is configured based on the type of
543 connection made (e.g. A config 526 connection made (e.g. A configured SDP should output a maximum
544 of 500mA so the input current 527 of 500mA so the input current limit is set to the same value).
545 Use preferably input_power_lim 528 Use preferably input_power_limit, and for problems that can be
546 solved using power limit use i 529 solved using power limit use input_current_limit.
547 530
548 Access: Read, Write 531 Access: Read, Write
549 532
550 Valid values: Represented in m 533 Valid values: Represented in microamps
551 534
552 What: /sys/class/power_supply/<suppl 535 What: /sys/class/power_supply/<supply_name>/input_voltage_limit
553 Date: May 2019 536 Date: May 2019
554 Contact: linux-pm@vger.kernel.org 537 Contact: linux-pm@vger.kernel.org
555 Description: 538 Description:
556 This entry configures the inco 539 This entry configures the incoming VBUS voltage limit currently
557 set in the supply. Normally th 540 set in the supply. Normally this is configured based on
558 system-level knowledge or user 541 system-level knowledge or user input (e.g. This is part of the
559 Pixel C's thermal management s 542 Pixel C's thermal management strategy to effectively limit the
560 input power to 5V when the scr 543 input power to 5V when the screen is on to meet Google's skin
561 temperature targets). Note tha 544 temperature targets). Note that this feature should not be
562 used for safety critical thing 545 used for safety critical things.
563 Use preferably input_power_lim 546 Use preferably input_power_limit, and for problems that can be
564 solved using power limit use i 547 solved using power limit use input_voltage_limit.
565 548
566 Access: Read, Write 549 Access: Read, Write
567 550
568 Valid values: Represented in m 551 Valid values: Represented in microvolts
569 552
570 What: /sys/class/power_supply/<suppl 553 What: /sys/class/power_supply/<supply_name>/input_power_limit
571 Date: May 2019 554 Date: May 2019
572 Contact: linux-pm@vger.kernel.org 555 Contact: linux-pm@vger.kernel.org
573 Description: 556 Description:
574 This entry configures the inco 557 This entry configures the incoming power limit currently set
575 in the supply. Normally this i 558 in the supply. Normally this is configured based on
576 system-level knowledge or user 559 system-level knowledge or user input. Use preferably this
577 feature to limit the incoming 560 feature to limit the incoming power and use current/voltage
578 limit only for problems that c 561 limit only for problems that can be solved using power limit.
579 562
580 Access: Read, Write 563 Access: Read, Write
581 564
582 Valid values: Represented in m 565 Valid values: Represented in microwatts
583 566
584 What: /sys/class/power_supply/<suppl 567 What: /sys/class/power_supply/<supply_name>/online,
585 Date: May 2007 568 Date: May 2007
586 Contact: linux-pm@vger.kernel.org 569 Contact: linux-pm@vger.kernel.org
587 Description: 570 Description:
588 Indicates if VBUS is present f 571 Indicates if VBUS is present for the supply. When the supply is
589 online, and the supply allows 572 online, and the supply allows it, then it's possible to switch
590 between online states (e.g. Fi 573 between online states (e.g. Fixed -> Programmable for a PD_PPS
591 USB supply so voltage and curr 574 USB supply so voltage and current can be controlled).
592 575
593 Access: Read, Write 576 Access: Read, Write
594 577
595 Valid values: 578 Valid values:
596 579
597 == =================== 580 == ==================================================
598 0: Offline 581 0: Offline
599 1: Online Fixed - Fixe 582 1: Online Fixed - Fixed Voltage Supply
600 2: Online Programmable 583 2: Online Programmable - Programmable Voltage Supply
601 == =================== 584 == ==================================================
602 585
603 What: /sys/class/power_supply/<suppl 586 What: /sys/class/power_supply/<supply_name>/usb_type
604 Date: March 2018 587 Date: March 2018
605 Contact: linux-pm@vger.kernel.org 588 Contact: linux-pm@vger.kernel.org
606 Description: 589 Description:
607 Reports what type of USB conne 590 Reports what type of USB connection is currently active for
608 the supply, for example it can 591 the supply, for example it can show if USB-PD capable source
609 is attached. 592 is attached.
610 593
611 Access: For power-supplies whi !! 594 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 <<
617 595
618 Valid values: 596 Valid values:
619 "Unknown", "SDP" 597 "Unknown", "SDP", "DCP", "CDP", "ACA", "C", "PD",
620 "PD_DRP", "PD_PP 598 "PD_DRP", "PD_PPS", "BrickID"
621 599
622 **Device Specific Properties** 600 **Device Specific Properties**
623 601
624 What: /sys/class/power/ds2760-batter 602 What: /sys/class/power/ds2760-battery.*/charge_now
625 Date: May 2010 603 Date: May 2010
626 KernelVersion: 2.6.35 604 KernelVersion: 2.6.35
627 Contact: Daniel Mack <daniel@caiaq.de> 605 Contact: Daniel Mack <daniel@caiaq.de>
628 Description: 606 Description:
629 This file is writeable and can 607 This file is writeable and can be used to set the current
630 coloumb counter value inside t 608 coloumb counter value inside the battery monitor chip. This
631 is needed for unavoidable corr 609 is needed for unavoidable corrections of aging batteries.
632 A userspace daemon can monitor 610 A userspace daemon can monitor the battery charging logic
633 and once the counter drops out 611 and once the counter drops out of considerable bounds, take
634 appropriate action. 612 appropriate action.
635 613
636 What: /sys/class/power/ds2760-batter 614 What: /sys/class/power/ds2760-battery.*/charge_full
637 Date: May 2010 615 Date: May 2010
638 KernelVersion: 2.6.35 616 KernelVersion: 2.6.35
639 Contact: Daniel Mack <daniel@caiaq.de> 617 Contact: Daniel Mack <daniel@caiaq.de>
640 Description: 618 Description:
641 This file is writeable and can 619 This file is writeable and can be used to set the assumed
642 battery 'full level'. As batte 620 battery 'full level'. As batteries age, this value has to be
643 amended over time. 621 amended over time.
644 622
645 What: /sys/class/power_supply/max145 623 What: /sys/class/power_supply/max14577-charger/device/fast_charge_timer
646 Date: October 2014 624 Date: October 2014
647 KernelVersion: 3.18.0 625 KernelVersion: 3.18.0
648 Contact: Krzysztof Kozlowski <krzk@kerne 626 Contact: Krzysztof Kozlowski <krzk@kernel.org>
649 Description: 627 Description:
650 This entry shows and sets the 628 This entry shows and sets the maximum time the max14577
651 charger operates in fast-charg 629 charger operates in fast-charge mode. When the timer expires
652 the device will terminate fast 630 the device will terminate fast-charge mode (charging current
653 will drop to 0 A) and will tri 631 will drop to 0 A) and will trigger interrupt.
654 632
655 Valid values: 633 Valid values:
656 634
657 - 5, 6 or 7 (hours), 635 - 5, 6 or 7 (hours),
658 - 0: disabled. 636 - 0: disabled.
659 637
660 What: /sys/class/power_supply/max776 638 What: /sys/class/power_supply/max77693-charger/device/fast_charge_timer
661 Date: January 2015 639 Date: January 2015
662 KernelVersion: 3.19.0 640 KernelVersion: 3.19.0
663 Contact: Krzysztof Kozlowski <krzk@kerne 641 Contact: Krzysztof Kozlowski <krzk@kernel.org>
664 Description: 642 Description:
665 This entry shows and sets the 643 This entry shows and sets the maximum time the max77693
666 charger operates in fast-charg 644 charger operates in fast-charge mode. When the timer expires
667 the device will terminate fast 645 the device will terminate fast-charge mode (charging current
668 will drop to 0 A) and will tri 646 will drop to 0 A) and will trigger interrupt.
669 647
670 Valid values: 648 Valid values:
671 649
672 - 4 - 16 (hours), step by 2 (r 650 - 4 - 16 (hours), step by 2 (rounded down)
673 - 0: disabled. 651 - 0: disabled.
674 652
675 What: /sys/class/power_supply/max776 653 What: /sys/class/power_supply/max77693-charger/device/top_off_threshold_current
676 Date: January 2015 654 Date: January 2015
677 KernelVersion: 3.19.0 655 KernelVersion: 3.19.0
678 Contact: Krzysztof Kozlowski <krzk@kerne 656 Contact: Krzysztof Kozlowski <krzk@kernel.org>
679 Description: 657 Description:
680 This entry shows and sets the 658 This entry shows and sets the charging current threshold for
681 entering top-off charging mode 659 entering top-off charging mode. When charging current in fast
682 charge mode drops below this v 660 charge mode drops below this value, the charger will trigger
683 interrupt and start top-off ch 661 interrupt and start top-off charging mode.
684 662
685 Valid values: 663 Valid values:
686 664
687 - 100000 - 200000 (microamps), 665 - 100000 - 200000 (microamps), step by 25000 (rounded down)
688 - 200000 - 350000 (microamps), 666 - 200000 - 350000 (microamps), step by 50000 (rounded down)
689 - 0: disabled. 667 - 0: disabled.
690 668
691 What: /sys/class/power_supply/max776 669 What: /sys/class/power_supply/max77693-charger/device/top_off_timer
692 Date: January 2015 670 Date: January 2015
693 KernelVersion: 3.19.0 671 KernelVersion: 3.19.0
694 Contact: Krzysztof Kozlowski <krzk@kerne 672 Contact: Krzysztof Kozlowski <krzk@kernel.org>
695 Description: 673 Description:
696 This entry shows and sets the 674 This entry shows and sets the maximum time the max77693
697 charger operates in top-off ch 675 charger operates in top-off charge mode. When the timer expires
698 the device will terminate top- 676 the device will terminate top-off charge mode (charging current
699 will drop to 0 A) and will tri 677 will drop to 0 A) and will trigger interrupt.
700 678
701 Valid values: 679 Valid values:
702 680
703 - 0 - 70 (minutes), step by 10 681 - 0 - 70 (minutes), step by 10 (rounded down)
704 682
705 What: /sys/class/power_supply/bq2425 683 What: /sys/class/power_supply/bq24257-charger/ovp_voltage
706 Date: October 2015 684 Date: October 2015
707 KernelVersion: 4.4.0 685 KernelVersion: 4.4.0
708 Contact: Andreas Dannenberg <dannenberg@ 686 Contact: Andreas Dannenberg <dannenberg@ti.com>
709 Description: 687 Description:
710 This entry configures the over 688 This entry configures the overvoltage protection feature of bq24257-
711 type charger devices. This fea 689 type charger devices. This feature protects the device and other
712 components against damage from 690 components against damage from overvoltage on the input supply. See
713 device datasheet for details. 691 device datasheet for details.
714 692
715 Valid values: 693 Valid values:
716 694
717 - 6000000, 6500000, 7000000, 8 695 - 6000000, 6500000, 7000000, 8000000, 9000000, 9500000, 10000000,
718 10500000 (all uV) 696 10500000 (all uV)
719 697
720 What: /sys/class/power_supply/bq2425 698 What: /sys/class/power_supply/bq24257-charger/in_dpm_voltage
721 Date: October 2015 699 Date: October 2015
722 KernelVersion: 4.4.0 700 KernelVersion: 4.4.0
723 Contact: Andreas Dannenberg <dannenberg@ 701 Contact: Andreas Dannenberg <dannenberg@ti.com>
724 Description: 702 Description:
725 This entry configures the inpu 703 This entry configures the input dynamic power path management voltage of
726 bq24257-type charger devices. 704 bq24257-type charger devices. Once the supply drops to the configured
727 voltage, the input current lim 705 voltage, the input current limit is reduced down to prevent the further
728 drop of the supply. When the I 706 drop of the supply. When the IC enters this mode, the charge current is
729 lower than the set value. See 707 lower than the set value. See device datasheet for details.
730 708
731 Valid values: 709 Valid values:
732 710
733 - 4200000, 4280000, 4360000, 4 711 - 4200000, 4280000, 4360000, 4440000, 4520000, 4600000, 4680000,
734 4760000 (all uV) 712 4760000 (all uV)
735 713
736 What: /sys/class/power_supply/bq2425 714 What: /sys/class/power_supply/bq24257-charger/high_impedance_enable
737 Date: October 2015 715 Date: October 2015
738 KernelVersion: 4.4.0 716 KernelVersion: 4.4.0
739 Contact: Andreas Dannenberg <dannenberg@ 717 Contact: Andreas Dannenberg <dannenberg@ti.com>
740 Description: 718 Description:
741 This entry allows enabling the 719 This entry allows enabling the high-impedance mode of bq24257-type
742 charger devices. If enabled, i 720 charger devices. If enabled, it places the charger IC into low power
743 standby mode with the switch m 721 standby mode with the switch mode controller disabled. When disabled,
744 the charger operates normally. 722 the charger operates normally. See device datasheet for details.
745 723
746 Valid values: 724 Valid values:
747 725
748 - 1: enabled 726 - 1: enabled
749 - 0: disabled 727 - 0: disabled
750 728
751 What: /sys/class/power_supply/bq2425 729 What: /sys/class/power_supply/bq24257-charger/sysoff_enable
752 Date: October 2015 730 Date: October 2015
753 KernelVersion: 4.4.0 731 KernelVersion: 4.4.0
754 Contact: Andreas Dannenberg <dannenberg@ 732 Contact: Andreas Dannenberg <dannenberg@ti.com>
755 Description: 733 Description:
756 This entry allows enabling the 734 This entry allows enabling the sysoff mode of bq24257-type charger
757 devices. If enabled and the in 735 devices. If enabled and the input is removed, the internal battery FET
758 is turned off in order to redu 736 is turned off in order to reduce the leakage from the BAT pin to less
759 than 1uA. Note that on some de 737 than 1uA. Note that on some devices/systems this disconnects the battery
760 from the system. See device da 738 from the system. See device datasheet for details.
761 739
762 Valid values: 740 Valid values:
763 741
764 - 1: enabled 742 - 1: enabled
765 - 0: disabled 743 - 0: disabled
766 744
767 What: /sys/class/power_supply/<suppl 745 What: /sys/class/power_supply/<supply_name>/manufacture_year
768 Date: January 2020 746 Date: January 2020
769 Contact: linux-pm@vger.kernel.org 747 Contact: linux-pm@vger.kernel.org
770 Description: 748 Description:
771 Reports the year (following Gr 749 Reports the year (following Gregorian calendar) when the device has been
772 manufactured. 750 manufactured.
773 751
774 Access: Read 752 Access: Read
775 753
776 Valid values: Reported as inte 754 Valid values: Reported as integer
777 755
778 What: /sys/class/power_supply/<suppl 756 What: /sys/class/power_supply/<supply_name>/manufacture_month
779 Date: January 2020 757 Date: January 2020
780 Contact: linux-pm@vger.kernel.org 758 Contact: linux-pm@vger.kernel.org
781 Description: 759 Description:
782 Reports the month when the dev 760 Reports the month when the device has been manufactured.
783 761
784 Access: Read 762 Access: Read
785 763
786 Valid values: 1-12 764 Valid values: 1-12
787 765
788 What: /sys/class/power_supply/<suppl 766 What: /sys/class/power_supply/<supply_name>/manufacture_day
789 Date: January 2020 767 Date: January 2020
790 Contact: linux-pm@vger.kernel.org 768 Contact: linux-pm@vger.kernel.org
791 Description: 769 Description:
792 Reports the day of month when 770 Reports the day of month when the device has been manufactured.
793 771
794 Access: Read 772 Access: Read
795 Valid values: 1-31 773 Valid values: 1-31
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