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1What: /sys/class/hwmon/hwmonX/name
2Description:
3 The chip name.
4 This should be a short, lowercase string, not containing
5 whitespace, dashes, or the wildcard character '*'.
6 This attribute represents the chip name. It is the only
7 mandatory attribute.
8 I2C devices get this attribute created automatically.
9
10 RO
11
12What: /sys/class/hwmon/hwmonX/label
13Description:
14 A descriptive label that allows to uniquely identify a
15 device within the system.
16 The contents of the label are free-form.
17
18 RO
19
20What: /sys/class/hwmon/hwmonX/update_interval
21Description:
22 The interval at which the chip will update readings.
23 Unit: millisecond
24
25 RW
26
27 Some devices have a variable update rate or interval.
28 This attribute can be used to change it to the desired value.
29
30What: /sys/class/hwmon/hwmonX/inY_min
31Description:
32 Voltage min value.
33
34 Unit: millivolt
35
36 RW
37
38What: /sys/class/hwmon/hwmonX/inY_lcrit
39Description:
40 Voltage critical min value.
41
42 Unit: millivolt
43
44 RW
45
46 If voltage drops to or below this limit, the system may
47 take drastic action such as power down or reset. At the very
48 least, it should report a fault.
49
50What: /sys/class/hwmon/hwmonX/inY_max
51Description:
52 Voltage max value.
53
54 Unit: millivolt
55
56 RW
57
58What: /sys/class/hwmon/hwmonX/inY_crit
59Description:
60 Voltage critical max value.
61
62 Unit: millivolt
63
64 RW
65
66 If voltage reaches or exceeds this limit, the system may
67 take drastic action such as power down or reset. At the very
68 least, it should report a fault.
69
70What: /sys/class/hwmon/hwmonX/inY_input
71Description:
72 Voltage input value.
73
74 Unit: millivolt
75
76 RO
77
78 Voltage measured on the chip pin.
79
80 Actual voltage depends on the scaling resistors on the
81 motherboard, as recommended in the chip datasheet.
82
83 This varies by chip and by motherboard.
84 Because of this variation, values are generally NOT scaled
85 by the chip driver, and must be done by the application.
86 However, some drivers (notably lm87 and via686a)
87 do scale, because of internal resistors built into a chip.
88 These drivers will output the actual voltage. Rule of
89 thumb: drivers should report the voltage values at the
90 "pins" of the chip.
91
92What: /sys/class/hwmon/hwmonX/inY_average
93Description:
94 Average voltage
95
96 Unit: millivolt
97
98 RO
99
100What: /sys/class/hwmon/hwmonX/inY_lowest
101Description:
102 Historical minimum voltage
103
104 Unit: millivolt
105
106 RO
107
108What: /sys/class/hwmon/hwmonX/inY_highest
109Description:
110 Historical maximum voltage
111
112 Unit: millivolt
113
114 RO
115
116What: /sys/class/hwmon/hwmonX/inY_reset_history
117Description:
118 Reset inX_lowest and inX_highest
119
120 WO
121
122What: /sys/class/hwmon/hwmonX/in_reset_history
123Description:
124 Reset inX_lowest and inX_highest for all sensors
125
126 WO
127
128What: /sys/class/hwmon/hwmonX/inY_label
129Description:
130 Suggested voltage channel label.
131
132 Text string
133
134 Should only be created if the driver has hints about what
135 this voltage channel is being used for, and user-space
136 doesn't. In all other cases, the label is provided by
137 user-space.
138
139 RO
140
141What: /sys/class/hwmon/hwmonX/inY_enable
142Description:
143 Enable or disable the sensors.
144
145 When disabled the sensor read will return -ENODATA.
146
147 - 1: Enable
148 - 0: Disable
149
150 RW
151
152What: /sys/class/hwmon/hwmonX/cpuY_vid
153Description:
154 CPU core reference voltage.
155
156 Unit: millivolt
157
158 RO
159
160 Not always correct.
161
162What: /sys/class/hwmon/hwmonX/vrm
163Description:
164 Voltage Regulator Module version number.
165
166 RW (but changing it should no more be necessary)
167
168 Originally the VRM standard version multiplied by 10, but now
169 an arbitrary number, as not all standards have a version
170 number.
171
172 Affects the way the driver calculates the CPU core reference
173 voltage from the vid pins.
174
175What: /sys/class/hwmon/hwmonX/inY_rated_min
176Description:
177 Minimum rated voltage.
178
179 Unit: millivolt
180
181 RO
182
183What: /sys/class/hwmon/hwmonX/inY_rated_max
184Description:
185 Maximum rated voltage.
186
187 Unit: millivolt
188
189 RO
190
191What: /sys/class/hwmon/hwmonX/fanY_min
192Description:
193 Fan minimum value
194
195 Unit: revolution/min (RPM)
196
197 RW
198
199What: /sys/class/hwmon/hwmonX/fanY_max
200Description:
201 Fan maximum value
202
203 Unit: revolution/min (RPM)
204
205 Only rarely supported by the hardware.
206 RW
207
208What: /sys/class/hwmon/hwmonX/fanY_input
209Description:
210 Fan input value.
211
212 Unit: revolution/min (RPM)
213
214 RO
215
216What: /sys/class/hwmon/hwmonX/fanY_div
217Description:
218 Fan divisor.
219
220 Integer value in powers of two (1, 2, 4, 8, 16, 32, 64, 128).
221
222 RW
223
224 Some chips only support values 1, 2, 4 and 8.
225 Note that this is actually an internal clock divisor, which
226 affects the measurable speed range, not the read value.
227
228What: /sys/class/hwmon/hwmonX/fanY_pulses
229Description:
230 Number of tachometer pulses per fan revolution.
231
232 Integer value, typically between 1 and 4.
233
234 RW
235
236 This value is a characteristic of the fan connected to the
237 device's input, so it has to be set in accordance with the fan
238 model.
239
240 Should only be created if the chip has a register to configure
241 the number of pulses. In the absence of such a register (and
242 thus attribute) the value assumed by all devices is 2 pulses
243 per fan revolution.
244
245What: /sys/class/hwmon/hwmonX/fanY_target
246Description:
247 Desired fan speed
248
249 Unit: revolution/min (RPM)
250
251 RW
252
253 Only makes sense if the chip supports closed-loop fan speed
254 control based on the measured fan speed.
255
256What: /sys/class/hwmon/hwmonX/fanY_label
257Description:
258 Suggested fan channel label.
259
260 Text string
261
262 Should only be created if the driver has hints about what
263 this fan channel is being used for, and user-space doesn't.
264 In all other cases, the label is provided by user-space.
265
266 RO
267
268What: /sys/class/hwmon/hwmonX/fanY_enable
269Description:
270 Enable or disable the sensors.
271
272 When disabled the sensor read will return -ENODATA.
273
274 - 1: Enable
275 - 0: Disable
276
277 RW
278
279What: /sys/class/hwmon/hwmonX/pwmY
280Description:
281 Pulse width modulation fan control.
282
283 Integer value in the range 0 to 255
284
285 RW
286
287 255 is max or 100%.
288
289What: /sys/class/hwmon/hwmonX/pwmY_enable
290Description:
291 Fan speed control method:
292
293 - 0: no fan speed control (i.e. fan at full speed)
294 - 1: manual fan speed control enabled (using `pwmY`)
295 - 2+: automatic fan speed control enabled
296
297 Check individual chip documentation files for automatic mode
298 details.
299
300 RW
301
302What: /sys/class/hwmon/hwmonX/pwmY_mode
303Description:
304 - 0: DC mode (direct current)
305 - 1: PWM mode (pulse-width modulation)
306
307 RW
308
309What: /sys/class/hwmon/hwmonX/pwmY_freq
310Description:
311 Base PWM frequency in Hz.
312
313 Only possibly available when pwmN_mode is PWM, but not always
314 present even then.
315
316 RW
317
318What: /sys/class/hwmon/hwmonX/pwmY_auto_channels_temp
319Description:
320 Select which temperature channels affect this PWM output in
321 auto mode.
322
323 Bitfield, 1 is temp1, 2 is temp2, 4 is temp3 etc...
324 Which values are possible depend on the chip used.
325
326 RW
327
328What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_pwm
329What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp
330What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp_hyst
331Description:
332 Define the PWM vs temperature curve.
333
334 Number of trip points is chip-dependent. Use this for chips
335 which associate trip points to PWM output channels.
336
337 RW
338
339What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_pwm
340What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp
341What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp_hyst
342Description:
343 Define the PWM vs temperature curve.
344
345 Number of trip points is chip-dependent. Use this for chips
346 which associate trip points to temperature channels.
347
348 RW
349
350What: /sys/class/hwmon/hwmonX/tempY_type
351Description:
352 Sensor type selection.
353
354 Integers 1 to 6
355
356 RW
357
358 - 1: CPU embedded diode
359 - 2: 3904 transistor
360 - 3: thermal diode
361 - 4: thermistor
362 - 5: AMD AMDSI
363 - 6: Intel PECI
364
365 Not all types are supported by all chips
366
367What: /sys/class/hwmon/hwmonX/tempY_max
368Description:
369 Temperature max value.
370
371 Unit: millidegree Celsius (or millivolt, see below)
372
373 RW
374
375What: /sys/class/hwmon/hwmonX/tempY_min
376Description:
377 Temperature min value.
378
379 Unit: millidegree Celsius
380
381 RW
382
383What: /sys/class/hwmon/hwmonX/tempY_max_hyst
384Description:
385 Temperature hysteresis value for max limit.
386
387 Unit: millidegree Celsius
388
389 Must be reported as an absolute temperature, NOT a delta
390 from the max value.
391
392 RW
393
394What: /sys/class/hwmon/hwmonX/tempY_min_hyst
395Description:
396 Temperature hysteresis value for min limit.
397 Unit: millidegree Celsius
398
399 Must be reported as an absolute temperature, NOT a delta
400 from the min value.
401
402 RW
403
404What: /sys/class/hwmon/hwmonX/tempY_input
405Description:
406 Temperature input value.
407
408 Unit: millidegree Celsius
409
410 RO
411
412What: /sys/class/hwmon/hwmonX/tempY_crit
413Description:
414 Temperature critical max value, typically greater than
415 corresponding temp_max values.
416
417 Unit: millidegree Celsius
418
419 RW
420
421What: /sys/class/hwmon/hwmonX/tempY_crit_alarm
422Description:
423 Critical high temperature alarm flag.
424
425 - 0: OK
426 - 1: temperature has reached tempY_crit
427
428 RW
429
430 Contrary to regular alarm flags which clear themselves
431 automatically when read, this one sticks until cleared by
432 the user. This is done by writing 0 to the file. Writing
433 other values is unsupported.
434
435What: /sys/class/hwmon/hwmonX/tempY_crit_hyst
436Description:
437 Temperature hysteresis value for critical limit.
438
439 Unit: millidegree Celsius
440
441 Must be reported as an absolute temperature, NOT a delta
442 from the critical value.
443
444 RW
445
446What: /sys/class/hwmon/hwmonX/tempY_emergency
447Description:
448 Temperature emergency max value, for chips supporting more than
449 two upper temperature limits. Must be equal or greater than
450 corresponding temp_crit values.
451
452 Unit: millidegree Celsius
453
454 RW
455
456What: /sys/class/hwmon/hwmonX/tempY_emergency_hyst
457Description:
458 Temperature hysteresis value for emergency limit.
459
460 Unit: millidegree Celsius
461
462 Must be reported as an absolute temperature, NOT a delta
463 from the emergency value.
464
465 RW
466
467What: /sys/class/hwmon/hwmonX/tempY_lcrit
468Description:
469 Temperature critical min value, typically lower than
470 corresponding temp_min values.
471
472 Unit: millidegree Celsius
473
474 RW
475
476What: /sys/class/hwmon/hwmonX/tempY_lcrit_hyst
477Description:
478 Temperature hysteresis value for critical min limit.
479
480 Unit: millidegree Celsius
481
482 Must be reported as an absolute temperature, NOT a delta
483 from the critical min value.
484
485 RW
486
487What: /sys/class/hwmon/hwmonX/tempY_offset
488Description:
489 Temperature offset which is added to the temperature reading
490 by the chip.
491
492 Unit: millidegree Celsius
493
494 Read/Write value.
495
496What: /sys/class/hwmon/hwmonX/tempY_label
497Description:
498 Suggested temperature channel label.
499
500 Text string
501
502 Should only be created if the driver has hints about what
503 this temperature channel is being used for, and user-space
504 doesn't. In all other cases, the label is provided by
505 user-space.
506
507 RO
508
509What: /sys/class/hwmon/hwmonX/tempY_lowest
510Description:
511 Historical minimum temperature
512
513 Unit: millidegree Celsius
514
515 RO
516
517What: /sys/class/hwmon/hwmonX/tempY_highest
518Description:
519 Historical maximum temperature
520
521 Unit: millidegree Celsius
522
523 RO
524
525What: /sys/class/hwmon/hwmonX/tempY_reset_history
526Description:
527 Reset temp_lowest and temp_highest
528
529 WO
530
531What: /sys/class/hwmon/hwmonX/temp_reset_history
532Description:
533 Reset temp_lowest and temp_highest for all sensors
534
535 WO
536
537What: /sys/class/hwmon/hwmonX/tempY_enable
538Description:
539 Enable or disable the sensors.
540
541 When disabled the sensor read will return -ENODATA.
542
543 - 1: Enable
544 - 0: Disable
545
546 RW
547
548What: /sys/class/hwmon/hwmonX/tempY_rated_min
549Description:
550 Minimum rated temperature.
551
552 Unit: millidegree Celsius
553
554 RO
555
556What: /sys/class/hwmon/hwmonX/tempY_rated_max
557Description:
558 Maximum rated temperature.
559
560 Unit: millidegree Celsius
561
562 RO
563
564What: /sys/class/hwmon/hwmonX/currY_max
565Description:
566 Current max value
567
568 Unit: milliampere
569
570 RW
571
572What: /sys/class/hwmon/hwmonX/currY_min
573Description:
574 Current min value.
575
576 Unit: milliampere
577
578 RW
579
580What: /sys/class/hwmon/hwmonX/currY_lcrit
581Description:
582 Current critical low value
583
584 Unit: milliampere
585
586 RW
587
588What: /sys/class/hwmon/hwmonX/currY_crit
589Description:
590 Current critical high value.
591
592 Unit: milliampere
593
594 RW
595
596What: /sys/class/hwmon/hwmonX/currY_input
597Description:
598 Current input value
599
600 Unit: milliampere
601
602 RO
603
604What: /sys/class/hwmon/hwmonX/currY_average
605Description:
606 Average current use
607
608 Unit: milliampere
609
610 RO
611
612What: /sys/class/hwmon/hwmonX/currY_lowest
613Description:
614 Historical minimum current
615
616 Unit: milliampere
617
618 RO
619
620What: /sys/class/hwmon/hwmonX/currY_highest
621Description:
622 Historical maximum current
623 Unit: milliampere
624 RO
625
626What: /sys/class/hwmon/hwmonX/currY_reset_history
627Description:
628 Reset currX_lowest and currX_highest
629
630 WO
631
632What: /sys/class/hwmon/hwmonX/curr_reset_history
633Description:
634 Reset currX_lowest and currX_highest for all sensors
635
636 WO
637
638What: /sys/class/hwmon/hwmonX/currY_enable
639Description:
640 Enable or disable the sensors.
641
642 When disabled the sensor read will return -ENODATA.
643
644 - 1: Enable
645 - 0: Disable
646
647 RW
648
649What: /sys/class/hwmon/hwmonX/currY_rated_min
650Description:
651 Minimum rated current.
652
653 Unit: milliampere
654
655 RO
656
657What: /sys/class/hwmon/hwmonX/currY_rated_max
658Description:
659 Maximum rated current.
660
661 Unit: milliampere
662
663 RO
664
665What: /sys/class/hwmon/hwmonX/powerY_average
666Description:
667 Average power use
668
669 Unit: microWatt
670
671 RO
672
673What: /sys/class/hwmon/hwmonX/powerY_average_interval
674Description:
675 Power use averaging interval. A poll
676 notification is sent to this file if the
677 hardware changes the averaging interval.
678
679 Unit: milliseconds
680
681 RW
682
683What: /sys/class/hwmon/hwmonX/powerY_average_interval_max
684Description:
685 Maximum power use averaging interval
686
687 Unit: milliseconds
688
689 RO
690
691What: /sys/class/hwmon/hwmonX/powerY_average_interval_min
692Description:
693 Minimum power use averaging interval
694
695 Unit: milliseconds
696
697 RO
698
699What: /sys/class/hwmon/hwmonX/powerY_average_highest
700Description:
701 Historical average maximum power use
702
703 Unit: microWatt
704
705 RO
706
707What: /sys/class/hwmon/hwmonX/powerY_average_lowest
708Description:
709 Historical average minimum power use
710
711 Unit: microWatt
712
713 RO
714
715What: /sys/class/hwmon/hwmonX/powerY_average_max
716Description:
717 A poll notification is sent to
718 `powerY_average` when power use
719 rises above this value.
720
721 Unit: microWatt
722
723 RW
724
725What: /sys/class/hwmon/hwmonX/powerY_average_min
726Description:
727 A poll notification is sent to
728 `powerY_average` when power use
729 sinks below this value.
730
731 Unit: microWatt
732
733 RW
734
735What: /sys/class/hwmon/hwmonX/powerY_input
736Description:
737 Instantaneous power use
738
739 Unit: microWatt
740
741 RO
742
743What: /sys/class/hwmon/hwmonX/powerY_input_highest
744Description:
745 Historical maximum power use
746
747 Unit: microWatt
748
749 RO
750
751What: /sys/class/hwmon/hwmonX/powerY_input_lowest
752Description:
753 Historical minimum power use
754
755 Unit: microWatt
756
757 RO
758
759What: /sys/class/hwmon/hwmonX/powerY_reset_history
760Description:
761 Reset input_highest, input_lowest,
762 average_highest and average_lowest.
763
764 WO
765
766What: /sys/class/hwmon/hwmonX/powerY_accuracy
767Description:
768 Accuracy of the power meter.
769
770 Unit: Percent
771
772 RO
773
774What: /sys/class/hwmon/hwmonX/powerY_cap
775Description:
776 If power use rises above this limit, the
777 system should take action to reduce power use.
778 A poll notification is sent to this file if the
779 cap is changed by the hardware. The `*_cap`
780 files only appear if the cap is known to be
781 enforced by hardware.
782
783 Unit: microWatt
784
785 RW
786
787What: /sys/class/hwmon/hwmonX/powerY_cap_hyst
788Description:
789 Margin of hysteresis built around capping and
790 notification.
791
792 Unit: microWatt
793
794 RW
795
796What: /sys/class/hwmon/hwmonX/powerY_cap_max
797Description:
798 Maximum cap that can be set.
799
800 Unit: microWatt
801
802 RO
803
804What: /sys/class/hwmon/hwmonX/powerY_cap_min
805Description:
806 Minimum cap that can be set.
807
808 Unit: microWatt
809
810 RO
811
812What: /sys/class/hwmon/hwmonX/powerY_max
813Description:
814 Maximum power.
815
816 Unit: microWatt
817
818 RW
819
820What: /sys/class/hwmon/hwmonX/powerY_crit
821Description:
822 Critical maximum power.
823
824 If power rises to or above this limit, the
825 system is expected take drastic action to reduce
826 power consumption, such as a system shutdown or
827 a forced powerdown of some devices.
828
829 Unit: microWatt
830
831 RW
832
833What: /sys/class/hwmon/hwmonX/powerY_enable
834Description:
835 Enable or disable the sensors.
836
837 When disabled the sensor read will return
838 -ENODATA.
839
840 - 1: Enable
841 - 0: Disable
842
843 RW
844
845What: /sys/class/hwmon/hwmonX/powerY_rated_min
846Description:
847 Minimum rated power.
848
849 Unit: microWatt
850
851 RO
852
853What: /sys/class/hwmon/hwmonX/powerY_rated_max
854Description:
855 Maximum rated power.
856
857 Unit: microWatt
858
859 RO
860
861What: /sys/class/hwmon/hwmonX/energyY_input
862Description:
863 Cumulative energy use
864
865 Unit: microJoule
866
867 RO
868
869What: /sys/class/hwmon/hwmonX/energyY_enable
870Description:
871 Enable or disable the sensors.
872
873 When disabled the sensor read will return
874 -ENODATA.
875
876 - 1: Enable
877 - 0: Disable
878
879 RW
880
881What: /sys/class/hwmon/hwmonX/humidityY_input
882Description:
883 Humidity
884
885 Unit: milli-percent (per cent mille, pcm)
886
887 RO
888
889
890What: /sys/class/hwmon/hwmonX/humidityY_enable
891Description:
892 Enable or disable the sensors
893
894 When disabled the sensor read will return
895 -ENODATA.
896
897 - 1: Enable
898 - 0: Disable
899
900 RW
901
902What: /sys/class/hwmon/hwmonX/humidityY_rated_min
903Description:
904 Minimum rated humidity.
905
906 Unit: milli-percent (per cent mille, pcm)
907
908 RO
909
910What: /sys/class/hwmon/hwmonX/humidityY_rated_max
911Description:
912 Maximum rated humidity.
913
914 Unit: milli-percent (per cent mille, pcm)
915
916 RO
917
918
919What: /sys/class/hwmon/hwmonX/intrusionY_alarm
920Description:
921 Chassis intrusion detection
922
923 - 0: OK
924 - 1: intrusion detected
925
926 RW
927
928 Contrary to regular alarm flags which clear themselves
929 automatically when read, this one sticks until cleared by
930 the user. This is done by writing 0 to the file. Writing
931 other values is unsupported.
932
933What: /sys/class/hwmon/hwmonX/intrusionY_beep
934Description:
935 Chassis intrusion beep
936
937 - 0: disable
938 - 1: enable
939
940 RW
941
942What: /sys/class/hwmon/hwmonX/device/pec
943Description:
944 PEC support on I2C devices
945
946 - 0, off, n: disable
947 - 1, on, y: enable
948
949 RW
1What: /sys/class/hwmon/hwmonX/name
2Description:
3 The chip name.
4 This should be a short, lowercase string, not containing
5 whitespace, dashes, or the wildcard character '*'.
6 This attribute represents the chip name. It is the only
7 mandatory attribute.
8 I2C devices get this attribute created automatically.
9
10 RO
11
12What: /sys/class/hwmon/hwmonX/label
13Description:
14 A descriptive label that allows to uniquely identify a
15 device within the system.
16 The contents of the label are free-form.
17
18 RO
19
20What: /sys/class/hwmon/hwmonX/update_interval
21Description:
22 The interval at which the chip will update readings.
23 Unit: millisecond
24
25 RW
26
27 Some devices have a variable update rate or interval.
28 This attribute can be used to change it to the desired value.
29
30What: /sys/class/hwmon/hwmonX/inY_min
31Description:
32 Voltage min value.
33
34 Unit: millivolt
35
36 RW
37
38What: /sys/class/hwmon/hwmonX/inY_lcrit
39Description:
40 Voltage critical min value.
41
42 Unit: millivolt
43
44 RW
45
46 If voltage drops to or below this limit, the system may
47 take drastic action such as power down or reset. At the very
48 least, it should report a fault.
49
50What: /sys/class/hwmon/hwmonX/inY_max
51Description:
52 Voltage max value.
53
54 Unit: millivolt
55
56 RW
57
58What: /sys/class/hwmon/hwmonX/inY_crit
59Description:
60 Voltage critical max value.
61
62 Unit: millivolt
63
64 RW
65
66 If voltage reaches or exceeds this limit, the system may
67 take drastic action such as power down or reset. At the very
68 least, it should report a fault.
69
70What: /sys/class/hwmon/hwmonX/inY_input
71Description:
72 Voltage input value.
73
74 Unit: millivolt
75
76 RO
77
78 Voltage measured on the chip pin.
79
80 Actual voltage depends on the scaling resistors on the
81 motherboard, as recommended in the chip datasheet.
82
83 This varies by chip and by motherboard.
84 Because of this variation, values are generally NOT scaled
85 by the chip driver, and must be done by the application.
86 However, some drivers (notably lm87 and via686a)
87 do scale, because of internal resistors built into a chip.
88 These drivers will output the actual voltage. Rule of
89 thumb: drivers should report the voltage values at the
90 "pins" of the chip.
91
92What: /sys/class/hwmon/hwmonX/inY_average
93Description:
94 Average voltage
95
96 Unit: millivolt
97
98 RO
99
100What: /sys/class/hwmon/hwmonX/inY_lowest
101Description:
102 Historical minimum voltage
103
104 Unit: millivolt
105
106 RO
107
108What: /sys/class/hwmon/hwmonX/inY_highest
109Description:
110 Historical maximum voltage
111
112 Unit: millivolt
113
114 RO
115
116What: /sys/class/hwmon/hwmonX/inY_reset_history
117Description:
118 Reset inX_lowest and inX_highest
119
120 WO
121
122What: /sys/class/hwmon/hwmonX/in_reset_history
123Description:
124 Reset inX_lowest and inX_highest for all sensors
125
126 WO
127
128What: /sys/class/hwmon/hwmonX/inY_label
129Description:
130 Suggested voltage channel label.
131
132 Text string
133
134 Should only be created if the driver has hints about what
135 this voltage channel is being used for, and user-space
136 doesn't. In all other cases, the label is provided by
137 user-space.
138
139 RO
140
141What: /sys/class/hwmon/hwmonX/inY_enable
142Description:
143 Enable or disable the sensors.
144
145 When disabled the sensor read will return -ENODATA.
146
147 - 1: Enable
148 - 0: Disable
149
150 RW
151
152What: /sys/class/hwmon/hwmonX/inY_fault
153Description:
154 Reports a voltage hard failure (eg: shorted component)
155
156 - 1: Failed
157 - 0: Ok
158
159 RO
160
161What: /sys/class/hwmon/hwmonX/cpuY_vid
162Description:
163 CPU core reference voltage.
164
165 Unit: millivolt
166
167 RO
168
169 Not always correct.
170
171What: /sys/class/hwmon/hwmonX/vrm
172Description:
173 Voltage Regulator Module version number.
174
175 RW (but changing it should no more be necessary)
176
177 Originally the VRM standard version multiplied by 10, but now
178 an arbitrary number, as not all standards have a version
179 number.
180
181 Affects the way the driver calculates the CPU core reference
182 voltage from the vid pins.
183
184What: /sys/class/hwmon/hwmonX/inY_rated_min
185Description:
186 Minimum rated voltage.
187
188 Unit: millivolt
189
190 RO
191
192What: /sys/class/hwmon/hwmonX/inY_rated_max
193Description:
194 Maximum rated voltage.
195
196 Unit: millivolt
197
198 RO
199
200What: /sys/class/hwmon/hwmonX/fanY_min
201Description:
202 Fan minimum value
203
204 Unit: revolution/min (RPM)
205
206 RW
207
208What: /sys/class/hwmon/hwmonX/fanY_max
209Description:
210 Fan maximum value
211
212 Unit: revolution/min (RPM)
213
214 Only rarely supported by the hardware.
215 RW
216
217What: /sys/class/hwmon/hwmonX/fanY_input
218Description:
219 Fan input value.
220
221 Unit: revolution/min (RPM)
222
223 RO
224
225What: /sys/class/hwmon/hwmonX/fanY_div
226Description:
227 Fan divisor.
228
229 Integer value in powers of two (1, 2, 4, 8, 16, 32, 64, 128).
230
231 RW
232
233 Some chips only support values 1, 2, 4 and 8.
234 Note that this is actually an internal clock divisor, which
235 affects the measurable speed range, not the read value.
236
237What: /sys/class/hwmon/hwmonX/fanY_pulses
238Description:
239 Number of tachometer pulses per fan revolution.
240
241 Integer value, typically between 1 and 4.
242
243 RW
244
245 This value is a characteristic of the fan connected to the
246 device's input, so it has to be set in accordance with the fan
247 model.
248
249 Should only be created if the chip has a register to configure
250 the number of pulses. In the absence of such a register (and
251 thus attribute) the value assumed by all devices is 2 pulses
252 per fan revolution.
253
254What: /sys/class/hwmon/hwmonX/fanY_target
255Description:
256 Desired fan speed
257
258 Unit: revolution/min (RPM)
259
260 RW
261
262 Only makes sense if the chip supports closed-loop fan speed
263 control based on the measured fan speed.
264
265What: /sys/class/hwmon/hwmonX/fanY_label
266Description:
267 Suggested fan channel label.
268
269 Text string
270
271 Should only be created if the driver has hints about what
272 this fan channel is being used for, and user-space doesn't.
273 In all other cases, the label is provided by user-space.
274
275 RO
276
277What: /sys/class/hwmon/hwmonX/fanY_enable
278Description:
279 Enable or disable the sensors.
280
281 When disabled the sensor read will return -ENODATA.
282
283 - 1: Enable
284 - 0: Disable
285
286 RW
287
288What: /sys/class/hwmon/hwmonX/fanY_fault
289Description:
290 Reports if a fan has reported failure.
291
292 - 1: Failed
293 - 0: Ok
294
295 RO
296
297What: /sys/class/hwmon/hwmonX/pwmY
298Description:
299 Pulse width modulation fan control.
300
301 Integer value in the range 0 to 255
302
303 RW
304
305 255 is max or 100%.
306
307What: /sys/class/hwmon/hwmonX/pwmY_enable
308Description:
309 Fan speed control method:
310
311 - 0: no fan speed control (i.e. fan at full speed)
312 - 1: manual fan speed control enabled (using `pwmY`)
313 - 2+: automatic fan speed control enabled
314
315 Check individual chip documentation files for automatic mode
316 details.
317
318 RW
319
320What: /sys/class/hwmon/hwmonX/pwmY_mode
321Description:
322 - 0: DC mode (direct current)
323 - 1: PWM mode (pulse-width modulation)
324
325 RW
326
327What: /sys/class/hwmon/hwmonX/pwmY_freq
328Description:
329 Base PWM frequency in Hz.
330
331 Only possibly available when pwmN_mode is PWM, but not always
332 present even then.
333
334 RW
335
336What: /sys/class/hwmon/hwmonX/pwmY_auto_channels_temp
337Description:
338 Select which temperature channels affect this PWM output in
339 auto mode.
340
341 Bitfield, 1 is temp1, 2 is temp2, 4 is temp3 etc...
342 Which values are possible depend on the chip used.
343
344 RW
345
346What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_pwm
347What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp
348What: /sys/class/hwmon/hwmonX/pwmY_auto_pointZ_temp_hyst
349Description:
350 Define the PWM vs temperature curve.
351
352 Number of trip points is chip-dependent. Use this for chips
353 which associate trip points to PWM output channels.
354
355 RW
356
357What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_pwm
358What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp
359What: /sys/class/hwmon/hwmonX/tempY_auto_pointZ_temp_hyst
360Description:
361 Define the PWM vs temperature curve.
362
363 Number of trip points is chip-dependent. Use this for chips
364 which associate trip points to temperature channels.
365
366 RW
367
368What: /sys/class/hwmon/hwmonX/tempY_type
369Description:
370 Sensor type selection.
371
372 Integers 1 to 6
373
374 RW
375
376 - 1: CPU embedded diode
377 - 2: 3904 transistor
378 - 3: thermal diode
379 - 4: thermistor
380 - 5: AMD AMDSI
381 - 6: Intel PECI
382
383 Not all types are supported by all chips
384
385What: /sys/class/hwmon/hwmonX/tempY_max
386Description:
387 Temperature max value.
388
389 Unit: millidegree Celsius (or millivolt, see below)
390
391 RW
392
393What: /sys/class/hwmon/hwmonX/tempY_max_alarm
394Description:
395 Maximum temperature alarm flag.
396
397 - 0: OK
398 - 1: temperature has reached tempY_max
399
400 RO
401
402What: /sys/class/hwmon/hwmonX/tempY_min
403Description:
404 Temperature min value.
405
406 Unit: millidegree Celsius
407
408 RW
409
410What: /sys/class/hwmon/hwmonX/tempY_min_alarm
411Description:
412 Minimum temperature alarm flag.
413
414 - 0: OK
415 - 1: temperature has reached tempY_min
416
417 RO
418
419What: /sys/class/hwmon/hwmonX/tempY_max_hyst
420Description:
421 Temperature hysteresis value for max limit.
422
423 Unit: millidegree Celsius
424
425 Must be reported as an absolute temperature, NOT a delta
426 from the max value.
427
428 RW
429
430What: /sys/class/hwmon/hwmonX/tempY_min_hyst
431Description:
432 Temperature hysteresis value for min limit.
433 Unit: millidegree Celsius
434
435 Must be reported as an absolute temperature, NOT a delta
436 from the min value.
437
438 RW
439
440What: /sys/class/hwmon/hwmonX/tempY_input
441Description:
442 Temperature input value.
443
444 Unit: millidegree Celsius
445
446 RO
447
448What: /sys/class/hwmon/hwmonX/tempY_crit
449Description:
450 Temperature critical max value, typically greater than
451 corresponding temp_max values.
452
453 Unit: millidegree Celsius
454
455 RW
456
457What: /sys/class/hwmon/hwmonX/tempY_crit_alarm
458Description:
459 Critical high temperature alarm flag.
460
461 - 0: OK
462 - 1: temperature has reached tempY_crit
463
464 RO
465
466What: /sys/class/hwmon/hwmonX/tempY_crit_hyst
467Description:
468 Temperature hysteresis value for critical limit.
469
470 Unit: millidegree Celsius
471
472 Must be reported as an absolute temperature, NOT a delta
473 from the critical value.
474
475 RW
476
477What: /sys/class/hwmon/hwmonX/tempY_emergency
478Description:
479 Temperature emergency max value, for chips supporting more than
480 two upper temperature limits. Must be equal or greater than
481 corresponding temp_crit values.
482
483 Unit: millidegree Celsius
484
485 RW
486
487What: /sys/class/hwmon/hwmonX/tempY_emergency_alarm
488Description:
489 Emergency high temperature alarm flag.
490
491 - 0: OK
492 - 1: temperature has reached tempY_emergency
493
494 RO
495
496What: /sys/class/hwmon/hwmonX/tempY_emergency_hyst
497Description:
498 Temperature hysteresis value for emergency limit.
499
500 Unit: millidegree Celsius
501
502 Must be reported as an absolute temperature, NOT a delta
503 from the emergency value.
504
505 RW
506
507What: /sys/class/hwmon/hwmonX/tempY_lcrit
508Description:
509 Temperature critical min value, typically lower than
510 corresponding temp_min values.
511
512 Unit: millidegree Celsius
513
514 RW
515
516What: /sys/class/hwmon/hwmonX/tempY_lcrit_hyst
517Description:
518 Temperature hysteresis value for critical min limit.
519
520 Unit: millidegree Celsius
521
522 Must be reported as an absolute temperature, NOT a delta
523 from the critical min value.
524
525 RW
526
527What: /sys/class/hwmon/hwmonX/tempY_offset
528Description:
529 Temperature offset which is added to the temperature reading
530 by the chip.
531
532 Unit: millidegree Celsius
533
534 Read/Write value.
535
536What: /sys/class/hwmon/hwmonX/tempY_label
537Description:
538 Suggested temperature channel label.
539
540 Text string
541
542 Should only be created if the driver has hints about what
543 this temperature channel is being used for, and user-space
544 doesn't. In all other cases, the label is provided by
545 user-space.
546
547 RO
548
549What: /sys/class/hwmon/hwmonX/tempY_lowest
550Description:
551 Historical minimum temperature
552
553 Unit: millidegree Celsius
554
555 RO
556
557What: /sys/class/hwmon/hwmonX/tempY_highest
558Description:
559 Historical maximum temperature
560
561 Unit: millidegree Celsius
562
563 RO
564
565What: /sys/class/hwmon/hwmonX/tempY_reset_history
566Description:
567 Reset temp_lowest and temp_highest
568
569 WO
570
571What: /sys/class/hwmon/hwmonX/temp_reset_history
572Description:
573 Reset temp_lowest and temp_highest for all sensors
574
575 WO
576
577What: /sys/class/hwmon/hwmonX/tempY_enable
578Description:
579 Enable or disable the sensors.
580
581 When disabled the sensor read will return -ENODATA.
582
583 - 1: Enable
584 - 0: Disable
585
586 RW
587
588What: /sys/class/hwmon/hwmonX/tempY_rated_min
589Description:
590 Minimum rated temperature.
591
592 Unit: millidegree Celsius
593
594 RO
595
596What: /sys/class/hwmon/hwmonX/tempY_rated_max
597Description:
598 Maximum rated temperature.
599
600 Unit: millidegree Celsius
601
602 RO
603
604What: /sys/class/hwmon/hwmonX/currY_max
605Description:
606 Current max value
607
608 Unit: milliampere
609
610 RW
611
612What: /sys/class/hwmon/hwmonX/currY_min
613Description:
614 Current min value.
615
616 Unit: milliampere
617
618 RW
619
620What: /sys/class/hwmon/hwmonX/currY_lcrit
621Description:
622 Current critical low value
623
624 Unit: milliampere
625
626 RW
627
628What: /sys/class/hwmon/hwmonX/currY_crit
629Description:
630 Current critical high value.
631
632 Unit: milliampere
633
634 RW
635
636What: /sys/class/hwmon/hwmonX/currY_input
637Description:
638 Current input value
639
640 Unit: milliampere
641
642 RO
643
644What: /sys/class/hwmon/hwmonX/currY_average
645Description:
646 Average current use
647
648 Unit: milliampere
649
650 RO
651
652What: /sys/class/hwmon/hwmonX/currY_lowest
653Description:
654 Historical minimum current
655
656 Unit: milliampere
657
658 RO
659
660What: /sys/class/hwmon/hwmonX/currY_highest
661Description:
662 Historical maximum current
663 Unit: milliampere
664 RO
665
666What: /sys/class/hwmon/hwmonX/currY_reset_history
667Description:
668 Reset currX_lowest and currX_highest
669
670 WO
671
672What: /sys/class/hwmon/hwmonX/curr_reset_history
673Description:
674 Reset currX_lowest and currX_highest for all sensors
675
676 WO
677
678What: /sys/class/hwmon/hwmonX/currY_enable
679Description:
680 Enable or disable the sensors.
681
682 When disabled the sensor read will return -ENODATA.
683
684 - 1: Enable
685 - 0: Disable
686
687 RW
688
689What: /sys/class/hwmon/hwmonX/currY_rated_min
690Description:
691 Minimum rated current.
692
693 Unit: milliampere
694
695 RO
696
697What: /sys/class/hwmon/hwmonX/currY_rated_max
698Description:
699 Maximum rated current.
700
701 Unit: milliampere
702
703 RO
704
705What: /sys/class/hwmon/hwmonX/powerY_average
706Description:
707 Average power use
708
709 Unit: microWatt
710
711 RO
712
713What: /sys/class/hwmon/hwmonX/powerY_average_interval
714Description:
715 Power use averaging interval. A poll
716 notification is sent to this file if the
717 hardware changes the averaging interval.
718
719 Unit: milliseconds
720
721 RW
722
723What: /sys/class/hwmon/hwmonX/powerY_average_interval_max
724Description:
725 Maximum power use averaging interval
726
727 Unit: milliseconds
728
729 RO
730
731What: /sys/class/hwmon/hwmonX/powerY_average_interval_min
732Description:
733 Minimum power use averaging interval
734
735 Unit: milliseconds
736
737 RO
738
739What: /sys/class/hwmon/hwmonX/powerY_average_highest
740Description:
741 Historical average maximum power use
742
743 Unit: microWatt
744
745 RO
746
747What: /sys/class/hwmon/hwmonX/powerY_average_lowest
748Description:
749 Historical average minimum power use
750
751 Unit: microWatt
752
753 RO
754
755What: /sys/class/hwmon/hwmonX/powerY_average_max
756Description:
757 A poll notification is sent to
758 `powerY_average` when power use
759 rises above this value.
760
761 Unit: microWatt
762
763 RW
764
765What: /sys/class/hwmon/hwmonX/powerY_average_min
766Description:
767 A poll notification is sent to
768 `powerY_average` when power use
769 sinks below this value.
770
771 Unit: microWatt
772
773 RW
774
775What: /sys/class/hwmon/hwmonX/powerY_input
776Description:
777 Instantaneous power use
778
779 Unit: microWatt
780
781 RO
782
783What: /sys/class/hwmon/hwmonX/powerY_input_highest
784Description:
785 Historical maximum power use
786
787 Unit: microWatt
788
789 RO
790
791What: /sys/class/hwmon/hwmonX/powerY_input_lowest
792Description:
793 Historical minimum power use
794
795 Unit: microWatt
796
797 RO
798
799What: /sys/class/hwmon/hwmonX/powerY_reset_history
800Description:
801 Reset input_highest, input_lowest,
802 average_highest and average_lowest.
803
804 WO
805
806What: /sys/class/hwmon/hwmonX/powerY_accuracy
807Description:
808 Accuracy of the power meter.
809
810 Unit: Percent
811
812 RO
813
814What: /sys/class/hwmon/hwmonX/powerY_cap
815Description:
816 If power use rises above this limit, the
817 system should take action to reduce power use.
818 A poll notification is sent to this file if the
819 cap is changed by the hardware. The `*_cap`
820 files only appear if the cap is known to be
821 enforced by hardware.
822
823 Unit: microWatt
824
825 RW
826
827What: /sys/class/hwmon/hwmonX/powerY_cap_hyst
828Description:
829 Margin of hysteresis built around capping and
830 notification.
831
832 Unit: microWatt
833
834 RW
835
836What: /sys/class/hwmon/hwmonX/powerY_cap_max
837Description:
838 Maximum cap that can be set.
839
840 Unit: microWatt
841
842 RO
843
844What: /sys/class/hwmon/hwmonX/powerY_cap_min
845Description:
846 Minimum cap that can be set.
847
848 Unit: microWatt
849
850 RO
851
852What: /sys/class/hwmon/hwmonX/powerY_max
853Description:
854 Maximum power.
855
856 Unit: microWatt
857
858 RW
859
860What: /sys/class/hwmon/hwmonX/powerY_crit
861Description:
862 Critical maximum power.
863
864 If power rises to or above this limit, the
865 system is expected take drastic action to reduce
866 power consumption, such as a system shutdown or
867 a forced powerdown of some devices.
868
869 Unit: microWatt
870
871 RW
872
873What: /sys/class/hwmon/hwmonX/powerY_enable
874Description:
875 Enable or disable the sensors.
876
877 When disabled the sensor read will return
878 -ENODATA.
879
880 - 1: Enable
881 - 0: Disable
882
883 RW
884
885What: /sys/class/hwmon/hwmonX/powerY_rated_min
886Description:
887 Minimum rated power.
888
889 Unit: microWatt
890
891 RO
892
893What: /sys/class/hwmon/hwmonX/powerY_rated_max
894Description:
895 Maximum rated power.
896
897 Unit: microWatt
898
899 RO
900
901What: /sys/class/hwmon/hwmonX/energyY_input
902Description:
903 Cumulative energy use
904
905 Unit: microJoule
906
907 RO
908
909What: /sys/class/hwmon/hwmonX/energyY_enable
910Description:
911 Enable or disable the sensors.
912
913 When disabled the sensor read will return
914 -ENODATA.
915
916 - 1: Enable
917 - 0: Disable
918
919 RW
920
921What: /sys/class/hwmon/hwmonX/humidityY_alarm
922Description:
923 Humidity limit detection
924
925 - 0: OK
926 - 1: Humidity limit has been reached
927
928 RO
929
930What: /sys/class/hwmon/hwmonX/humidityY_enable
931Description:
932 Enable or disable the sensors
933
934 When disabled the sensor read will return
935 -ENODATA.
936
937 - 1: Enable
938 - 0: Disable
939
940 RW
941
942What: /sys/class/hwmon/hwmonX/humidityY_fault
943Description:
944 Reports a humidity sensor failure.
945
946 - 1: Failed
947 - 0: Ok
948
949 RO
950
951What: /sys/class/hwmon/hwmonX/humidityY_input
952Description:
953 Humidity
954
955 Unit: milli-percent (per cent mille, pcm)
956
957 RO
958
959What: /sys/class/hwmon/hwmonX/humidityY_label
960Description:
961 Suggested humidity channel label.
962
963 Text string
964
965 Should only be created if the driver has hints about what
966 this humidity channel is being used for, and user-space
967 doesn't. In all other cases, the label is provided by
968 user-space.
969
970 RO
971
972What: /sys/class/hwmon/hwmonX/humidityY_max
973Description:
974 Humidity max value.
975
976 Unit: milli-percent (per cent mille, pcm)
977
978 RW
979
980What: /sys/class/hwmon/hwmonX/humidityY_max_alarm
981Description:
982 Maximum humidity detection
983
984 - 0: OK
985 - 1: Maximum humidity detected
986
987 RO
988
989What: /sys/class/hwmon/hwmonX/humidityY_max_hyst
990Description:
991 Humidity hysteresis value for max limit.
992
993 Unit: milli-percent (per cent mille, pcm)
994
995 Must be reported as an absolute humidity, NOT a delta
996 from the max value.
997
998 RW
999
1000What: /sys/class/hwmon/hwmonX/humidityY_min
1001Description:
1002 Humidity min value.
1003
1004 Unit: milli-percent (per cent mille, pcm)
1005
1006 RW
1007
1008What: /sys/class/hwmon/hwmonX/humidityY_min_alarm
1009Description:
1010 Minimum humidity detection
1011
1012 - 0: OK
1013 - 1: Minimum humidity detected
1014
1015 RO
1016
1017What: /sys/class/hwmon/hwmonX/humidityY_min_hyst
1018Description:
1019 Humidity hysteresis value for min limit.
1020
1021 Unit: milli-percent (per cent mille, pcm)
1022
1023 Must be reported as an absolute humidity, NOT a delta
1024 from the min value.
1025
1026 RW
1027
1028What: /sys/class/hwmon/hwmonX/humidityY_rated_min
1029Description:
1030 Minimum rated humidity.
1031
1032 Unit: milli-percent (per cent mille, pcm)
1033
1034 RO
1035
1036What: /sys/class/hwmon/hwmonX/humidityY_rated_max
1037Description:
1038 Maximum rated humidity.
1039
1040 Unit: milli-percent (per cent mille, pcm)
1041
1042 RO
1043
1044
1045What: /sys/class/hwmon/hwmonX/intrusionY_alarm
1046Description:
1047 Chassis intrusion detection
1048
1049 - 0: OK
1050 - 1: intrusion detected
1051
1052 RW
1053
1054 Contrary to regular alarm flags which clear themselves
1055 automatically when read, this one sticks until cleared by
1056 the user. This is done by writing 0 to the file. Writing
1057 other values is unsupported.
1058
1059What: /sys/class/hwmon/hwmonX/intrusionY_beep
1060Description:
1061 Chassis intrusion beep
1062
1063 - 0: disable
1064 - 1: enable
1065
1066 RW
1067
1068What: /sys/class/hwmon/hwmonX/device/pec
1069Description:
1070 PEC support on I2C devices
1071
1072 - 0, off, n: disable
1073 - 1, on, y: enable
1074
1075 RW