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1==========================
2WatchDog Module Parameters
3==========================
4
5This file provides information on the module parameters of many of
6the Linux watchdog drivers. Watchdog driver parameter specs should
7be listed here unless the driver has its own driver-specific information
8file.
9
10See Documentation/admin-guide/kernel-parameters.rst for information on
11providing kernel parameters for builtin drivers versus loadable
12modules.
13
14-------------------------------------------------
15
16watchdog core:
17 open_timeout:
18 Maximum time, in seconds, for which the watchdog framework will take
19 care of pinging a running hardware watchdog until userspace opens the
20 corresponding /dev/watchdogN device. A value of 0 means an infinite
21 timeout. Setting this to a non-zero value can be useful to ensure that
22 either userspace comes up properly, or the board gets reset and allows
23 fallback logic in the bootloader to try something else.
24
25-------------------------------------------------
26
27acquirewdt:
28 wdt_stop:
29 Acquire WDT 'stop' io port (default 0x43)
30 wdt_start:
31 Acquire WDT 'start' io port (default 0x443)
32 nowayout:
33 Watchdog cannot be stopped once started
34 (default=kernel config parameter)
35
36-------------------------------------------------
37
38advantechwdt:
39 wdt_stop:
40 Advantech WDT 'stop' io port (default 0x443)
41 wdt_start:
42 Advantech WDT 'start' io port (default 0x443)
43 timeout:
44 Watchdog timeout in seconds. 1<= timeout <=63, default=60.
45 nowayout:
46 Watchdog cannot be stopped once started
47 (default=kernel config parameter)
48
49-------------------------------------------------
50
51alim1535_wdt:
52 timeout:
53 Watchdog timeout in seconds. (0 < timeout < 18000, default=60
54 nowayout:
55 Watchdog cannot be stopped once started
56 (default=kernel config parameter)
57
58-------------------------------------------------
59
60alim7101_wdt:
61 timeout:
62 Watchdog timeout in seconds. (1<=timeout<=3600, default=30
63 use_gpio:
64 Use the gpio watchdog (required by old cobalt boards).
65 default=0/off/no
66 nowayout:
67 Watchdog cannot be stopped once started
68 (default=kernel config parameter)
69
70-------------------------------------------------
71
72ar7_wdt:
73 margin:
74 Watchdog margin in seconds (default=60)
75 nowayout:
76 Disable watchdog shutdown on close
77 (default=kernel config parameter)
78
79-------------------------------------------------
80
81armada_37xx_wdt:
82 timeout:
83 Watchdog timeout in seconds. (default=120)
84 nowayout:
85 Disable watchdog shutdown on close
86 (default=kernel config parameter)
87
88-------------------------------------------------
89
90at91rm9200_wdt:
91 wdt_time:
92 Watchdog time in seconds. (default=5)
93 nowayout:
94 Watchdog cannot be stopped once started
95 (default=kernel config parameter)
96
97-------------------------------------------------
98
99at91sam9_wdt:
100 heartbeat:
101 Watchdog heartbeats in seconds. (default = 15)
102 nowayout:
103 Watchdog cannot be stopped once started
104 (default=kernel config parameter)
105
106-------------------------------------------------
107
108bcm47xx_wdt:
109 wdt_time:
110 Watchdog time in seconds. (default=30)
111 nowayout:
112 Watchdog cannot be stopped once started
113 (default=kernel config parameter)
114
115-------------------------------------------------
116
117coh901327_wdt:
118 margin:
119 Watchdog margin in seconds (default 60s)
120
121-------------------------------------------------
122
123cpwd:
124 wd0_timeout:
125 Default watchdog0 timeout in 1/10secs
126 wd1_timeout:
127 Default watchdog1 timeout in 1/10secs
128 wd2_timeout:
129 Default watchdog2 timeout in 1/10secs
130
131-------------------------------------------------
132
133da9052wdt:
134 timeout:
135 Watchdog timeout in seconds. 2<= timeout <=131, default=2.048s
136 nowayout:
137 Watchdog cannot be stopped once started
138 (default=kernel config parameter)
139
140-------------------------------------------------
141
142davinci_wdt:
143 heartbeat:
144 Watchdog heartbeat period in seconds from 1 to 600, default 60
145
146-------------------------------------------------
147
148ebc-c384_wdt:
149 timeout:
150 Watchdog timeout in seconds. (1<=timeout<=15300, default=60)
151 nowayout:
152 Watchdog cannot be stopped once started
153
154-------------------------------------------------
155
156ep93xx_wdt:
157 nowayout:
158 Watchdog cannot be stopped once started
159 timeout:
160 Watchdog timeout in seconds. (1<=timeout<=3600, default=TBD)
161
162-------------------------------------------------
163
164eurotechwdt:
165 nowayout:
166 Watchdog cannot be stopped once started
167 (default=kernel config parameter)
168 io:
169 Eurotech WDT io port (default=0x3f0)
170 irq:
171 Eurotech WDT irq (default=10)
172 ev:
173 Eurotech WDT event type (default is `int`)
174
175-------------------------------------------------
176
177gef_wdt:
178 nowayout:
179 Watchdog cannot be stopped once started
180 (default=kernel config parameter)
181
182-------------------------------------------------
183
184geodewdt:
185 timeout:
186 Watchdog timeout in seconds. 1<= timeout <=131, default=60.
187 nowayout:
188 Watchdog cannot be stopped once started
189 (default=kernel config parameter)
190
191-------------------------------------------------
192
193i6300esb:
194 heartbeat:
195 Watchdog heartbeat in seconds. (1<heartbeat<2046, default=30)
196 nowayout:
197 Watchdog cannot be stopped once started
198 (default=kernel config parameter)
199
200-------------------------------------------------
201
202iTCO_wdt:
203 heartbeat:
204 Watchdog heartbeat in seconds.
205 (2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=30)
206 nowayout:
207 Watchdog cannot be stopped once started
208 (default=kernel config parameter)
209
210-------------------------------------------------
211
212iTCO_vendor_support:
213 vendorsupport:
214 iTCO vendor specific support mode, default=0 (none),
215 1=SuperMicro Pent3, 2=SuperMicro Pent4+, 911=Broken SMI BIOS
216
217-------------------------------------------------
218
219ib700wdt:
220 timeout:
221 Watchdog timeout in seconds. 0<= timeout <=30, default=30.
222 nowayout:
223 Watchdog cannot be stopped once started
224 (default=kernel config parameter)
225
226-------------------------------------------------
227
228ibmasr:
229 nowayout:
230 Watchdog cannot be stopped once started
231 (default=kernel config parameter)
232
233-------------------------------------------------
234
235imx2_wdt:
236 timeout:
237 Watchdog timeout in seconds (default 60 s)
238 nowayout:
239 Watchdog cannot be stopped once started
240 (default=kernel config parameter)
241
242-------------------------------------------------
243
244indydog:
245 nowayout:
246 Watchdog cannot be stopped once started
247 (default=kernel config parameter)
248
249-------------------------------------------------
250
251iop_wdt:
252 nowayout:
253 Watchdog cannot be stopped once started
254 (default=kernel config parameter)
255
256-------------------------------------------------
257
258it8712f_wdt:
259 margin:
260 Watchdog margin in seconds (default 60)
261 nowayout:
262 Disable watchdog shutdown on close
263 (default=kernel config parameter)
264
265-------------------------------------------------
266
267it87_wdt:
268 nogameport:
269 Forbid the activation of game port, default=0
270 nocir:
271 Forbid the use of CIR (workaround for some buggy setups); set to 1 if
272system resets despite watchdog daemon running, default=0
273 exclusive:
274 Watchdog exclusive device open, default=1
275 timeout:
276 Watchdog timeout in seconds, default=60
277 testmode:
278 Watchdog test mode (1 = no reboot), default=0
279 nowayout:
280 Watchdog cannot be stopped once started
281 (default=kernel config parameter)
282
283-------------------------------------------------
284
285ixp4xx_wdt:
286 heartbeat:
287 Watchdog heartbeat in seconds (default 60s)
288 nowayout:
289 Watchdog cannot be stopped once started
290 (default=kernel config parameter)
291
292-------------------------------------------------
293
294machzwd:
295 nowayout:
296 Watchdog cannot be stopped once started
297 (default=kernel config parameter)
298 action:
299 after watchdog resets, generate:
300 0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI
301
302-------------------------------------------------
303
304max63xx_wdt:
305 heartbeat:
306 Watchdog heartbeat period in seconds from 1 to 60, default 60
307 nowayout:
308 Watchdog cannot be stopped once started
309 (default=kernel config parameter)
310 nodelay:
311 Force selection of a timeout setting without initial delay
312 (max6373/74 only, default=0)
313
314-------------------------------------------------
315
316mixcomwd:
317 nowayout:
318 Watchdog cannot be stopped once started
319 (default=kernel config parameter)
320
321-------------------------------------------------
322
323mpc8xxx_wdt:
324 timeout:
325 Watchdog timeout in ticks. (0<timeout<65536, default=65535)
326 reset:
327 Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset
328 nowayout:
329 Watchdog cannot be stopped once started
330 (default=kernel config parameter)
331
332-------------------------------------------------
333
334mv64x60_wdt:
335 nowayout:
336 Watchdog cannot be stopped once started
337 (default=kernel config parameter)
338
339-------------------------------------------------
340
341ni903x_wdt:
342 timeout:
343 Initial watchdog timeout in seconds (0<timeout<516, default=60)
344 nowayout:
345 Watchdog cannot be stopped once started
346 (default=kernel config parameter)
347
348-------------------------------------------------
349
350nic7018_wdt:
351 timeout:
352 Initial watchdog timeout in seconds (0<timeout<464, default=80)
353 nowayout:
354 Watchdog cannot be stopped once started
355 (default=kernel config parameter)
356
357-------------------------------------------------
358
359omap_wdt:
360 timer_margin:
361 initial watchdog timeout (in seconds)
362 early_enable:
363 Watchdog is started on module insertion (default=0
364 nowayout:
365 Watchdog cannot be stopped once started
366 (default=kernel config parameter)
367
368-------------------------------------------------
369
370orion_wdt:
371 heartbeat:
372 Initial watchdog heartbeat in seconds
373 nowayout:
374 Watchdog cannot be stopped once started
375 (default=kernel config parameter)
376
377-------------------------------------------------
378
379pc87413_wdt:
380 io:
381 pc87413 WDT I/O port (default: io).
382 timeout:
383 Watchdog timeout in minutes (default=timeout).
384 nowayout:
385 Watchdog cannot be stopped once started
386 (default=kernel config parameter)
387
388-------------------------------------------------
389
390pika_wdt:
391 heartbeat:
392 Watchdog heartbeats in seconds. (default = 15)
393 nowayout:
394 Watchdog cannot be stopped once started
395 (default=kernel config parameter)
396
397-------------------------------------------------
398
399pnx4008_wdt:
400 heartbeat:
401 Watchdog heartbeat period in seconds from 1 to 60, default 19
402 nowayout:
403 Set to 1 to keep watchdog running after device release
404
405-------------------------------------------------
406
407pnx833x_wdt:
408 timeout:
409 Watchdog timeout in Mhz. (68Mhz clock), default=2040000000 (30 seconds)
410 nowayout:
411 Watchdog cannot be stopped once started
412 (default=kernel config parameter)
413 start_enabled:
414 Watchdog is started on module insertion (default=1)
415
416-------------------------------------------------
417
418pseries-wdt:
419 action:
420 Action taken when watchdog expires: 0 (power off), 1 (restart),
421 2 (dump and restart). (default=1)
422 timeout:
423 Initial watchdog timeout in seconds. (default=60)
424 nowayout:
425 Watchdog cannot be stopped once started.
426 (default=kernel config parameter)
427
428-------------------------------------------------
429
430rc32434_wdt:
431 timeout:
432 Watchdog timeout value, in seconds (default=20)
433 nowayout:
434 Watchdog cannot be stopped once started
435 (default=kernel config parameter)
436
437-------------------------------------------------
438
439riowd:
440 riowd_timeout:
441 Watchdog timeout in minutes (default=1)
442
443-------------------------------------------------
444
445s3c2410_wdt:
446 tmr_margin:
447 Watchdog tmr_margin in seconds. (default=15)
448 tmr_atboot:
449 Watchdog is started at boot time if set to 1, default=0
450 nowayout:
451 Watchdog cannot be stopped once started
452 (default=kernel config parameter)
453 soft_noboot:
454 Watchdog action, set to 1 to ignore reboots, 0 to reboot
455 debug:
456 Watchdog debug, set to >1 for debug, (default 0)
457
458-------------------------------------------------
459
460sa1100_wdt:
461 margin:
462 Watchdog margin in seconds (default 60s)
463
464-------------------------------------------------
465
466sb_wdog:
467 timeout:
468 Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)
469
470-------------------------------------------------
471
472sbc60xxwdt:
473 wdt_stop:
474 SBC60xx WDT 'stop' io port (default 0x45)
475 wdt_start:
476 SBC60xx WDT 'start' io port (default 0x443)
477 timeout:
478 Watchdog timeout in seconds. (1<=timeout<=3600, default=30)
479 nowayout:
480 Watchdog cannot be stopped once started
481 (default=kernel config parameter)
482
483-------------------------------------------------
484
485sbc7240_wdt:
486 timeout:
487 Watchdog timeout in seconds. (1<=timeout<=255, default=30)
488 nowayout:
489 Disable watchdog when closing device file
490
491-------------------------------------------------
492
493sbc8360:
494 timeout:
495 Index into timeout table (0-63) (default=27 (60s))
496 nowayout:
497 Watchdog cannot be stopped once started
498 (default=kernel config parameter)
499
500-------------------------------------------------
501
502sbc_epx_c3:
503 nowayout:
504 Watchdog cannot be stopped once started
505 (default=kernel config parameter)
506
507-------------------------------------------------
508
509sbc_fitpc2_wdt:
510 margin:
511 Watchdog margin in seconds (default 60s)
512 nowayout:
513 Watchdog cannot be stopped once started
514
515-------------------------------------------------
516
517sbsa_gwdt:
518 timeout:
519 Watchdog timeout in seconds. (default 10s)
520 action:
521 Watchdog action at the first stage timeout,
522 set to 0 to ignore, 1 to panic. (default=0)
523 nowayout:
524 Watchdog cannot be stopped once started
525 (default=kernel config parameter)
526
527-------------------------------------------------
528
529sc1200wdt:
530 isapnp:
531 When set to 0 driver ISA PnP support will be disabled (default=1)
532 io:
533 io port
534 timeout:
535 range is 0-255 minutes, default is 1
536 nowayout:
537 Watchdog cannot be stopped once started
538 (default=kernel config parameter)
539
540-------------------------------------------------
541
542sc520_wdt:
543 timeout:
544 Watchdog timeout in seconds. (1 <= timeout <= 3600, default=30)
545 nowayout:
546 Watchdog cannot be stopped once started
547 (default=kernel config parameter)
548
549-------------------------------------------------
550
551sch311x_wdt:
552 force_id:
553 Override the detected device ID
554 therm_trip:
555 Should a ThermTrip trigger the reset generator
556 timeout:
557 Watchdog timeout in seconds. 1<= timeout <=15300, default=60
558 nowayout:
559 Watchdog cannot be stopped once started
560 (default=kernel config parameter)
561
562-------------------------------------------------
563
564scx200_wdt:
565 margin:
566 Watchdog margin in seconds
567 nowayout:
568 Disable watchdog shutdown on close
569
570-------------------------------------------------
571
572shwdt:
573 clock_division_ratio:
574 Clock division ratio. Valid ranges are from 0x5 (1.31ms)
575 to 0x7 (5.25ms). (default=7)
576 heartbeat:
577 Watchdog heartbeat in seconds. (1 <= heartbeat <= 3600, default=30
578 nowayout:
579 Watchdog cannot be stopped once started
580 (default=kernel config parameter)
581
582-------------------------------------------------
583
584smsc37b787_wdt:
585 timeout:
586 range is 1-255 units, default is 60
587 nowayout:
588 Watchdog cannot be stopped once started
589 (default=kernel config parameter)
590
591-------------------------------------------------
592
593softdog:
594 soft_margin:
595 Watchdog soft_margin in seconds.
596 (0 < soft_margin < 65536, default=60)
597 nowayout:
598 Watchdog cannot be stopped once started
599 (default=kernel config parameter)
600 soft_noboot:
601 Softdog action, set to 1 to ignore reboots, 0 to reboot
602 (default=0)
603
604-------------------------------------------------
605
606stmp3xxx_wdt:
607 heartbeat:
608 Watchdog heartbeat period in seconds from 1 to 4194304, default 19
609
610-------------------------------------------------
611
612tegra_wdt:
613 heartbeat:
614 Watchdog heartbeats in seconds. (default = 120)
615 nowayout:
616 Watchdog cannot be stopped once started
617 (default=kernel config parameter)
618
619-------------------------------------------------
620
621ts72xx_wdt:
622 timeout:
623 Watchdog timeout in seconds. (1 <= timeout <= 8, default=8)
624 nowayout:
625 Disable watchdog shutdown on close
626
627-------------------------------------------------
628
629twl4030_wdt:
630 nowayout:
631 Watchdog cannot be stopped once started
632 (default=kernel config parameter)
633
634-------------------------------------------------
635
636txx9wdt:
637 timeout:
638 Watchdog timeout in seconds. (0<timeout<N, default=60)
639 nowayout:
640 Watchdog cannot be stopped once started
641 (default=kernel config parameter)
642
643-------------------------------------------------
644
645uniphier_wdt:
646 timeout:
647 Watchdog timeout in power of two seconds.
648 (1 <= timeout <= 128, default=64)
649 nowayout:
650 Watchdog cannot be stopped once started
651 (default=kernel config parameter)
652
653-------------------------------------------------
654
655w83627hf_wdt:
656 wdt_io:
657 w83627hf/thf WDT io port (default 0x2E)
658 timeout:
659 Watchdog timeout in seconds. 1 <= timeout <= 255, default=60.
660 nowayout:
661 Watchdog cannot be stopped once started
662 (default=kernel config parameter)
663
664-------------------------------------------------
665
666w83877f_wdt:
667 timeout:
668 Watchdog timeout in seconds. (1<=timeout<=3600, default=30)
669 nowayout:
670 Watchdog cannot be stopped once started
671 (default=kernel config parameter)
672
673-------------------------------------------------
674
675w83977f_wdt:
676 timeout:
677 Watchdog timeout in seconds (15..7635), default=45)
678 testmode:
679 Watchdog testmode (1 = no reboot), default=0
680 nowayout:
681 Watchdog cannot be stopped once started
682 (default=kernel config parameter)
683
684-------------------------------------------------
685
686wafer5823wdt:
687 timeout:
688 Watchdog timeout in seconds. 1 <= timeout <= 255, default=60.
689 nowayout:
690 Watchdog cannot be stopped once started
691 (default=kernel config parameter)
692
693-------------------------------------------------
694
695wdt285:
696 soft_margin:
697 Watchdog timeout in seconds (default=60)
698
699-------------------------------------------------
700
701wdt977:
702 timeout:
703 Watchdog timeout in seconds (60..15300, default=60)
704 testmode:
705 Watchdog testmode (1 = no reboot), default=0
706 nowayout:
707 Watchdog cannot be stopped once started
708 (default=kernel config parameter)
709
710-------------------------------------------------
711
712wm831x_wdt:
713 nowayout:
714 Watchdog cannot be stopped once started
715 (default=kernel config parameter)
716
717-------------------------------------------------
718
719wm8350_wdt:
720 nowayout:
721 Watchdog cannot be stopped once started
722 (default=kernel config parameter)
723
724-------------------------------------------------
725
726sun4v_wdt:
727 timeout_ms:
728 Watchdog timeout in milliseconds 1..180000, default=60000)
729 nowayout:
730 Watchdog cannot be stopped once started