1 ==========================
2 WatchDog Module Parameters
3 ==========================
5 This file provides information on the module parameters of many of
6 the Linux watchdog drivers. Watchdog driver parameter specs should
7 be listed here unless the driver has its own driver-specific information
10 See Documentation/admin-guide/kernel-parameters.rst for information on
11 providing kernel parameters for builtin drivers versus loadable
14 -------------------------------------------------
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.
25 -------------------------------------------------
29 Acquire WDT 'stop' io port (default 0x43)
31 Acquire WDT 'start' io port (default 0x443)
33 Watchdog cannot be stopped once started
34 (default=kernel config parameter)
36 -------------------------------------------------
40 Advantech WDT 'stop' io port (default 0x443)
42 Advantech WDT 'start' io port (default 0x443)
44 Watchdog timeout in seconds. 1<= timeout <=63, default=60.
46 Watchdog cannot be stopped once started
47 (default=kernel config parameter)
49 -------------------------------------------------
53 Watchdog timeout in seconds. (0 < timeout < 18000, default=60
55 Watchdog cannot be stopped once started
56 (default=kernel config parameter)
58 -------------------------------------------------
62 Watchdog timeout in seconds. (1<=timeout<=3600, default=30
64 Use the gpio watchdog (required by old cobalt boards).
67 Watchdog cannot be stopped once started
68 (default=kernel config parameter)
70 -------------------------------------------------
74 Watchdog margin in seconds (default=60)
76 Disable watchdog shutdown on close
77 (default=kernel config parameter)
79 -------------------------------------------------
83 Watchdog timeout in seconds. (default=120)
85 Disable watchdog shutdown on close
86 (default=kernel config parameter)
88 -------------------------------------------------
92 Watchdog time in seconds. (default=5)
94 Watchdog cannot be stopped once started
95 (default=kernel config parameter)
97 -------------------------------------------------
101 Watchdog heartbeats in seconds. (default = 15)
103 Watchdog cannot be stopped once started
104 (default=kernel config parameter)
106 -------------------------------------------------
110 Watchdog time in seconds. (default=30)
112 Watchdog cannot be stopped once started
113 (default=kernel config parameter)
115 -------------------------------------------------
119 Watchdog margin in seconds (default 60s)
121 -------------------------------------------------
125 base address of watchdog card, default is 0x91
127 be verbose, default is 0 (no)
129 count down ticks, default is 10000
131 -------------------------------------------------
135 Default watchdog0 timeout in 1/10secs
137 Default watchdog1 timeout in 1/10secs
139 Default watchdog2 timeout in 1/10secs
141 -------------------------------------------------
145 Watchdog timeout in seconds. 2<= timeout <=131, default=2.048s
147 Watchdog cannot be stopped once started
148 (default=kernel config parameter)
150 -------------------------------------------------
154 Watchdog heartbeat period in seconds from 1 to 600, default 60
156 -------------------------------------------------
160 Watchdog timeout in seconds. (1<=timeout<=15300, default=60)
162 Watchdog cannot be stopped once started
164 -------------------------------------------------
168 Watchdog cannot be stopped once started
170 Watchdog timeout in seconds. (1<=timeout<=3600, default=TBD)
172 -------------------------------------------------
176 Watchdog cannot be stopped once started
177 (default=kernel config parameter)
179 Eurotech WDT io port (default=0x3f0)
181 Eurotech WDT irq (default=10)
183 Eurotech WDT event type (default is `int`)
185 -------------------------------------------------
189 Watchdog cannot be stopped once started
190 (default=kernel config parameter)
192 -------------------------------------------------
196 Watchdog timeout in seconds. 1<= timeout <=131, default=60.
198 Watchdog cannot be stopped once started
199 (default=kernel config parameter)
201 -------------------------------------------------
205 Watchdog heartbeat in seconds. (1<heartbeat<2046, default=30)
207 Watchdog cannot be stopped once started
208 (default=kernel config parameter)
210 -------------------------------------------------
214 Watchdog heartbeat in seconds.
215 (2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=30)
217 Watchdog cannot be stopped once started
218 (default=kernel config parameter)
220 -------------------------------------------------
224 iTCO vendor specific support mode, default=0 (none),
225 1=SuperMicro Pent3, 2=SuperMicro Pent4+, 911=Broken SMI BIOS
227 -------------------------------------------------
231 Watchdog timeout in seconds. 0<= timeout <=30, default=30.
233 Watchdog cannot be stopped once started
234 (default=kernel config parameter)
236 -------------------------------------------------
240 Watchdog cannot be stopped once started
241 (default=kernel config parameter)
243 -------------------------------------------------
247 Watchdog timeout in seconds (default 60 s)
249 Watchdog cannot be stopped once started
250 (default=kernel config parameter)
252 -------------------------------------------------
256 Watchdog cannot be stopped once started
257 (default=kernel config parameter)
259 -------------------------------------------------
263 Watchdog cannot be stopped once started
264 (default=kernel config parameter)
266 -------------------------------------------------
270 Watchdog margin in seconds (default 60)
272 Disable watchdog shutdown on close
273 (default=kernel config parameter)
275 -------------------------------------------------
279 Forbid the activation of game port, default=0
281 Forbid the use of CIR (workaround for some buggy setups); set to 1 if
282 system resets despite watchdog daemon running, default=0
284 Watchdog exclusive device open, default=1
286 Watchdog timeout in seconds, default=60
288 Watchdog test mode (1 = no reboot), default=0
290 Watchdog cannot be stopped once started
291 (default=kernel config parameter)
293 -------------------------------------------------
297 Watchdog heartbeat in seconds (default 60s)
299 Watchdog cannot be stopped once started
300 (default=kernel config parameter)
302 -------------------------------------------------
306 Watchdog time in seconds. (default=5)
308 Watchdog cannot be stopped once started
309 (default=kernel config parameter)
311 -------------------------------------------------
315 Watchdog cannot be stopped once started
316 (default=kernel config parameter)
318 after watchdog resets, generate:
319 0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI
321 -------------------------------------------------
325 Watchdog heartbeat period in seconds from 1 to 60, default 60
327 Watchdog cannot be stopped once started
328 (default=kernel config parameter)
330 Force selection of a timeout setting without initial delay
331 (max6373/74 only, default=0)
333 -------------------------------------------------
337 Watchdog cannot be stopped once started
338 (default=kernel config parameter)
340 -------------------------------------------------
344 Watchdog timeout in ticks. (0<timeout<65536, default=65535)
346 Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset
348 Watchdog cannot be stopped once started
349 (default=kernel config parameter)
351 -------------------------------------------------
355 Watchdog cannot be stopped once started
356 (default=kernel config parameter)
358 -------------------------------------------------
362 Initial watchdog timeout in seconds (0<timeout<516, default=60)
364 Watchdog cannot be stopped once started
365 (default=kernel config parameter)
367 -------------------------------------------------
371 Initial watchdog timeout in seconds (0<timeout<464, default=80)
373 Watchdog cannot be stopped once started
374 (default=kernel config parameter)
376 -------------------------------------------------
380 Watchdog heartbeats in seconds.
383 Watchdog cannot be stopped once started
384 (default=kernel config parameter)
386 -------------------------------------------------
390 initial watchdog timeout (in seconds)
392 Watchdog is started on module insertion (default=0
394 Watchdog cannot be stopped once started
395 (default=kernel config parameter)
397 -------------------------------------------------
401 Initial watchdog heartbeat in seconds
403 Watchdog cannot be stopped once started
404 (default=kernel config parameter)
406 -------------------------------------------------
410 pc87413 WDT I/O port (default: io).
412 Watchdog timeout in minutes (default=timeout).
414 Watchdog cannot be stopped once started
415 (default=kernel config parameter)
417 -------------------------------------------------
421 Watchdog heartbeats in seconds. (default = 15)
423 Watchdog cannot be stopped once started
424 (default=kernel config parameter)
426 -------------------------------------------------
430 Watchdog heartbeat period in seconds from 1 to 60, default 19
432 Set to 1 to keep watchdog running after device release
434 -------------------------------------------------
438 Watchdog timeout in Mhz. (68Mhz clock), default=2040000000 (30 seconds)
440 Watchdog cannot be stopped once started
441 (default=kernel config parameter)
443 Watchdog is started on module insertion (default=1)
445 -------------------------------------------------
449 Watchdog timeout value, in seconds (default=20)
451 Watchdog cannot be stopped once started
452 (default=kernel config parameter)
454 -------------------------------------------------
458 Watchdog timeout in minutes (default=1)
460 -------------------------------------------------
464 Watchdog tmr_margin in seconds. (default=15)
466 Watchdog is started at boot time if set to 1, default=0
468 Watchdog cannot be stopped once started
469 (default=kernel config parameter)
471 Watchdog action, set to 1 to ignore reboots, 0 to reboot
473 Watchdog debug, set to >1 for debug, (default 0)
475 -------------------------------------------------
479 Watchdog margin in seconds (default 60s)
481 -------------------------------------------------
485 Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)
487 -------------------------------------------------
491 SBC60xx WDT 'stop' io port (default 0x45)
493 SBC60xx WDT 'start' io port (default 0x443)
495 Watchdog timeout in seconds. (1<=timeout<=3600, default=30)
497 Watchdog cannot be stopped once started
498 (default=kernel config parameter)
500 -------------------------------------------------
504 Watchdog timeout in seconds. (1<=timeout<=255, default=30)
506 Disable watchdog when closing device file
508 -------------------------------------------------
512 Index into timeout table (0-63) (default=27 (60s))
514 Watchdog cannot be stopped once started
515 (default=kernel config parameter)
517 -------------------------------------------------
521 Watchdog cannot be stopped once started
522 (default=kernel config parameter)
524 -------------------------------------------------
528 Watchdog margin in seconds (default 60s)
530 Watchdog cannot be stopped once started
532 -------------------------------------------------
536 Watchdog timeout in seconds. (default 10s)
538 Watchdog action at the first stage timeout,
539 set to 0 to ignore, 1 to panic. (default=0)
541 Watchdog cannot be stopped once started
542 (default=kernel config parameter)
544 -------------------------------------------------
548 When set to 0 driver ISA PnP support will be disabled (default=1)
552 range is 0-255 minutes, default is 1
554 Watchdog cannot be stopped once started
555 (default=kernel config parameter)
557 -------------------------------------------------
561 Watchdog timeout in seconds. (1 <= timeout <= 3600, default=30)
563 Watchdog cannot be stopped once started
564 (default=kernel config parameter)
566 -------------------------------------------------
570 Override the detected device ID
572 Should a ThermTrip trigger the reset generator
574 Watchdog timeout in seconds. 1<= timeout <=15300, default=60
576 Watchdog cannot be stopped once started
577 (default=kernel config parameter)
579 -------------------------------------------------
583 Watchdog margin in seconds
585 Disable watchdog shutdown on close
587 -------------------------------------------------
590 clock_division_ratio:
591 Clock division ratio. Valid ranges are from 0x5 (1.31ms)
592 to 0x7 (5.25ms). (default=7)
594 Watchdog heartbeat in seconds. (1 <= heartbeat <= 3600, default=30
596 Watchdog cannot be stopped once started
597 (default=kernel config parameter)
599 -------------------------------------------------
603 range is 1-255 units, default is 60
605 Watchdog cannot be stopped once started
606 (default=kernel config parameter)
608 -------------------------------------------------
612 Watchdog soft_margin in seconds.
613 (0 < soft_margin < 65536, default=60)
615 Watchdog cannot be stopped once started
616 (default=kernel config parameter)
618 Softdog action, set to 1 to ignore reboots, 0 to reboot
621 -------------------------------------------------
625 Watchdog heartbeat period in seconds from 1 to 4194304, default 19
627 -------------------------------------------------
631 Watchdog heartbeats in seconds. (default = 120)
633 Watchdog cannot be stopped once started
634 (default=kernel config parameter)
636 -------------------------------------------------
640 Watchdog timeout in seconds. (1 <= timeout <= 8, default=8)
642 Disable watchdog shutdown on close
644 -------------------------------------------------
648 Watchdog cannot be stopped once started
649 (default=kernel config parameter)
651 -------------------------------------------------
655 Watchdog timeout in seconds. (0<timeout<N, default=60)
657 Watchdog cannot be stopped once started
658 (default=kernel config parameter)
660 -------------------------------------------------
664 Watchdog timeout in power of two seconds.
665 (1 <= timeout <= 128, default=64)
667 Watchdog cannot be stopped once started
668 (default=kernel config parameter)
670 -------------------------------------------------
674 w83627hf/thf WDT io port (default 0x2E)
676 Watchdog timeout in seconds. 1 <= timeout <= 255, default=60.
678 Watchdog cannot be stopped once started
679 (default=kernel config parameter)
681 -------------------------------------------------
685 Watchdog timeout in seconds. (1<=timeout<=3600, default=30)
687 Watchdog cannot be stopped once started
688 (default=kernel config parameter)
690 -------------------------------------------------
694 Watchdog timeout in seconds (15..7635), default=45)
696 Watchdog testmode (1 = no reboot), default=0
698 Watchdog cannot be stopped once started
699 (default=kernel config parameter)
701 -------------------------------------------------
705 Watchdog timeout in seconds. 1 <= timeout <= 255, default=60.
707 Watchdog cannot be stopped once started
708 (default=kernel config parameter)
710 -------------------------------------------------
714 Watchdog timeout in seconds (default=60)
716 -------------------------------------------------
720 Watchdog timeout in seconds (60..15300, default=60)
722 Watchdog testmode (1 = no reboot), default=0
724 Watchdog cannot be stopped once started
725 (default=kernel config parameter)
727 -------------------------------------------------
731 Watchdog cannot be stopped once started
732 (default=kernel config parameter)
734 -------------------------------------------------
738 Watchdog cannot be stopped once started
739 (default=kernel config parameter)
741 -------------------------------------------------
745 Watchdog timeout in milliseconds 1..180000, default=60000)
747 Watchdog cannot be stopped once started