1 ========================== 2 WatchDog Module Parameters 3 ========================== 4 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 8 file. 9 10 See Documentation/admin-guide/kernel-parameters.rst for information on 11 providing kernel parameters for builtin drivers versus loadable 12 modules. 13 14 ------------------------------------------------- 15 16 watchdog 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 27 acquirewdt: 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 38 advantechwdt: 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 51 alim1535_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 60 alim7101_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 72 ar7_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 81 armada_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 90 at91rm9200_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 99 at91sam9_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 ------------------------------------------------- 107 108 bcm47xx_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 ------------------------------------------------- 116 117 coh901327_wdt: 118 margin: 119 Watchdog margin in seconds (default 60s) 120 121 ------------------------------------------------- 122 123 cpu5wdt: 124 port: 125 base address of watchdog card, default is 0x91 126 verbose: 127 be verbose, default is 0 (no) 128 ticks: 129 count down ticks, default is 10000 130 131 ------------------------------------------------- 132 133 cpwd: 134 wd0_timeout: 135 Default watchdog0 timeout in 1/10secs 136 wd1_timeout: 137 Default watchdog1 timeout in 1/10secs 138 wd2_timeout: 139 Default watchdog2 timeout in 1/10secs 140 141 ------------------------------------------------- 142 143 da9052wdt: 144 timeout: 145 Watchdog timeout in seconds. 2<= timeout <=131, default=2.048s 146 nowayout: 147 Watchdog cannot be stopped once started 148 (default=kernel config parameter) 149 150 ------------------------------------------------- 151 152 davinci_wdt: 153 heartbeat: 154 Watchdog heartbeat period in seconds from 1 to 600, default 60 155 156 ------------------------------------------------- 157 158 ebc-c384_wdt: 159 timeout: 160 Watchdog timeout in seconds. (1<=timeout<=15300, default=60) 161 nowayout: 162 Watchdog cannot be stopped once started 163 164 ------------------------------------------------- 165 166 ep93xx_wdt: 167 nowayout: 168 Watchdog cannot be stopped once started 169 timeout: 170 Watchdog timeout in seconds. (1<=timeout<=3600, default=TBD) 171 172 ------------------------------------------------- 173 174 eurotechwdt: 175 nowayout: 176 Watchdog cannot be stopped once started 177 (default=kernel config parameter) 178 io: 179 Eurotech WDT io port (default=0x3f0) 180 irq: 181 Eurotech WDT irq (default=10) 182 ev: 183 Eurotech WDT event type (default is `int`) 184 185 ------------------------------------------------- 186 187 gef_wdt: 188 nowayout: 189 Watchdog cannot be stopped once started 190 (default=kernel config parameter) 191 192 ------------------------------------------------- 193 194 geodewdt: 195 timeout: 196 Watchdog timeout in seconds. 1<= timeout <=131, default=60. 197 nowayout: 198 Watchdog cannot be stopped once started 199 (default=kernel config parameter) 200 201 ------------------------------------------------- 202 203 i6300esb: 204 heartbeat: 205 Watchdog heartbeat in seconds. (1<heartbeat<2046, default=30) 206 nowayout: 207 Watchdog cannot be stopped once started 208 (default=kernel config parameter) 209 210 ------------------------------------------------- 211 212 iTCO_wdt: 213 heartbeat: 214 Watchdog heartbeat in seconds. 215 (2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=30) 216 nowayout: 217 Watchdog cannot be stopped once started 218 (default=kernel config parameter) 219 220 ------------------------------------------------- 221 222 iTCO_vendor_support: 223 vendorsupport: 224 iTCO vendor specific support mode, default=0 (none), 225 1=SuperMicro Pent3, 2=SuperMicro Pent4+, 911=Broken SMI BIOS 226 227 ------------------------------------------------- 228 229 ib700wdt: 230 timeout: 231 Watchdog timeout in seconds. 0<= timeout <=30, default=30. 232 nowayout: 233 Watchdog cannot be stopped once started 234 (default=kernel config parameter) 235 236 ------------------------------------------------- 237 238 ibmasr: 239 nowayout: 240 Watchdog cannot be stopped once started 241 (default=kernel config parameter) 242 243 ------------------------------------------------- 244 245 imx2_wdt: 246 timeout: 247 Watchdog timeout in seconds (default 60 s) 248 nowayout: 249 Watchdog cannot be stopped once started 250 (default=kernel config parameter) 251 252 ------------------------------------------------- 253 254 indydog: 255 nowayout: 256 Watchdog cannot be stopped once started 257 (default=kernel config parameter) 258 259 ------------------------------------------------- 260 261 iop_wdt: 262 nowayout: 263 Watchdog cannot be stopped once started 264 (default=kernel config parameter) 265 266 ------------------------------------------------- 267 268 it8712f_wdt: 269 margin: 270 Watchdog margin in seconds (default 60) 271 nowayout: 272 Disable watchdog shutdown on close 273 (default=kernel config parameter) 274 275 ------------------------------------------------- 276 277 it87_wdt: 278 nogameport: 279 Forbid the activation of game port, default=0 280 nocir: 281 Forbid the use of CIR (workaround for some buggy setups); set to 1 if 282 system resets despite watchdog daemon running, default=0 283 exclusive: 284 Watchdog exclusive device open, default=1 285 timeout: 286 Watchdog timeout in seconds, default=60 287 testmode: 288 Watchdog test mode (1 = no reboot), default=0 289 nowayout: 290 Watchdog cannot be stopped once started 291 (default=kernel config parameter) 292 293 ------------------------------------------------- 294 295 ixp4xx_wdt: 296 heartbeat: 297 Watchdog heartbeat in seconds (default 60s) 298 nowayout: 299 Watchdog cannot be stopped once started 300 (default=kernel config parameter) 301 302 ------------------------------------------------- 303 304 machzwd: 305 nowayout: 306 Watchdog cannot be stopped once started 307 (default=kernel config parameter) 308 action: 309 after watchdog resets, generate: 310 0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI 311 312 ------------------------------------------------- 313 314 max63xx_wdt: 315 heartbeat: 316 Watchdog heartbeat period in seconds from 1 to 60, default 60 317 nowayout: 318 Watchdog cannot be stopped once started 319 (default=kernel config parameter) 320 nodelay: 321 Force selection of a timeout setting without initial delay 322 (max6373/74 only, default=0) 323 324 ------------------------------------------------- 325 326 mixcomwd: 327 nowayout: 328 Watchdog cannot be stopped once started 329 (default=kernel config parameter) 330 331 ------------------------------------------------- 332 333 mpc8xxx_wdt: 334 timeout: 335 Watchdog timeout in ticks. (0<timeout<65536, default=65535) 336 reset: 337 Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset 338 nowayout: 339 Watchdog cannot be stopped once started 340 (default=kernel config parameter) 341 342 ------------------------------------------------- 343 344 mv64x60_wdt: 345 nowayout: 346 Watchdog cannot be stopped once started 347 (default=kernel config parameter) 348 349 ------------------------------------------------- 350 351 ni903x_wdt: 352 timeout: 353 Initial watchdog timeout in seconds (0<timeout<516, default=60) 354 nowayout: 355 Watchdog cannot be stopped once started 356 (default=kernel config parameter) 357 358 ------------------------------------------------- 359 360 nic7018_wdt: 361 timeout: 362 Initial watchdog timeout in seconds (0<timeout<464, default=80) 363 nowayout: 364 Watchdog cannot be stopped once started 365 (default=kernel config parameter) 366 367 ------------------------------------------------- 368 369 omap_wdt: 370 timer_margin: 371 initial watchdog timeout (in seconds) 372 early_enable: 373 Watchdog is started on module insertion (default=0 374 nowayout: 375 Watchdog cannot be stopped once started 376 (default=kernel config parameter) 377 378 ------------------------------------------------- 379 380 orion_wdt: 381 heartbeat: 382 Initial watchdog heartbeat in seconds 383 nowayout: 384 Watchdog cannot be stopped once started 385 (default=kernel config parameter) 386 387 ------------------------------------------------- 388 389 pc87413_wdt: 390 io: 391 pc87413 WDT I/O port (default: io). 392 timeout: 393 Watchdog timeout in minutes (default=timeout). 394 nowayout: 395 Watchdog cannot be stopped once started 396 (default=kernel config parameter) 397 398 ------------------------------------------------- 399 400 pika_wdt: 401 heartbeat: 402 Watchdog heartbeats in seconds. (default = 15) 403 nowayout: 404 Watchdog cannot be stopped once started 405 (default=kernel config parameter) 406 407 ------------------------------------------------- 408 409 pnx4008_wdt: 410 heartbeat: 411 Watchdog heartbeat period in seconds from 1 to 60, default 19 412 nowayout: 413 Set to 1 to keep watchdog running after device release 414 415 ------------------------------------------------- 416 417 pnx833x_wdt: 418 timeout: 419 Watchdog timeout in Mhz. (68Mhz clock), default=2040000000 (30 seconds) 420 nowayout: 421 Watchdog cannot be stopped once started 422 (default=kernel config parameter) 423 start_enabled: 424 Watchdog is started on module insertion (default=1) 425 426 ------------------------------------------------- 427 428 pseries-wdt: 429 action: 430 Action taken when watchdog expires: 0 (power off), 1 (restart), 431 2 (dump and restart). (default=1) 432 timeout: 433 Initial watchdog timeout in seconds. (default=60) 434 nowayout: 435 Watchdog cannot be stopped once started. 436 (default=kernel config parameter) 437 438 ------------------------------------------------- 439 440 rc32434_wdt: 441 timeout: 442 Watchdog timeout value, in seconds (default=20) 443 nowayout: 444 Watchdog cannot be stopped once started 445 (default=kernel config parameter) 446 447 ------------------------------------------------- 448 449 riowd: 450 riowd_timeout: 451 Watchdog timeout in minutes (default=1) 452 453 ------------------------------------------------- 454 455 s3c2410_wdt: 456 tmr_margin: 457 Watchdog tmr_margin in seconds. (default=15) 458 tmr_atboot: 459 Watchdog is started at boot time if set to 1, default=0 460 nowayout: 461 Watchdog cannot be stopped once started 462 (default=kernel config parameter) 463 soft_noboot: 464 Watchdog action, set to 1 to ignore reboots, 0 to reboot 465 debug: 466 Watchdog debug, set to >1 for debug, (default 0) 467 468 ------------------------------------------------- 469 470 sa1100_wdt: 471 margin: 472 Watchdog margin in seconds (default 60s) 473 474 ------------------------------------------------- 475 476 sb_wdog: 477 timeout: 478 Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs) 479 480 ------------------------------------------------- 481 482 sbc60xxwdt: 483 wdt_stop: 484 SBC60xx WDT 'stop' io port (default 0x45) 485 wdt_start: 486 SBC60xx WDT 'start' io port (default 0x443) 487 timeout: 488 Watchdog timeout in seconds. (1<=timeout<=3600, default=30) 489 nowayout: 490 Watchdog cannot be stopped once started 491 (default=kernel config parameter) 492 493 ------------------------------------------------- 494 495 sbc7240_wdt: 496 timeout: 497 Watchdog timeout in seconds. (1<=timeout<=255, default=30) 498 nowayout: 499 Disable watchdog when closing device file 500 501 ------------------------------------------------- 502 503 sbc8360: 504 timeout: 505 Index into timeout table (0-63) (default=27 (60s)) 506 nowayout: 507 Watchdog cannot be stopped once started 508 (default=kernel config parameter) 509 510 ------------------------------------------------- 511 512 sbc_epx_c3: 513 nowayout: 514 Watchdog cannot be stopped once started 515 (default=kernel config parameter) 516 517 ------------------------------------------------- 518 519 sbc_fitpc2_wdt: 520 margin: 521 Watchdog margin in seconds (default 60s) 522 nowayout: 523 Watchdog cannot be stopped once started 524 525 ------------------------------------------------- 526 527 sbsa_gwdt: 528 timeout: 529 Watchdog timeout in seconds. (default 10s) 530 action: 531 Watchdog action at the first stage timeout, 532 set to 0 to ignore, 1 to panic. (default=0) 533 nowayout: 534 Watchdog cannot be stopped once started 535 (default=kernel config parameter) 536 537 ------------------------------------------------- 538 539 sc1200wdt: 540 isapnp: 541 When set to 0 driver ISA PnP support will be disabled (default=1) 542 io: 543 io port 544 timeout: 545 range is 0-255 minutes, default is 1 546 nowayout: 547 Watchdog cannot be stopped once started 548 (default=kernel config parameter) 549 550 ------------------------------------------------- 551 552 sc520_wdt: 553 timeout: 554 Watchdog timeout in seconds. (1 <= timeout <= 3600, default=30) 555 nowayout: 556 Watchdog cannot be stopped once started 557 (default=kernel config parameter) 558 559 ------------------------------------------------- 560 561 sch311x_wdt: 562 force_id: 563 Override the detected device ID 564 therm_trip: 565 Should a ThermTrip trigger the reset generator 566 timeout: 567 Watchdog timeout in seconds. 1<= timeout <=15300, default=60 568 nowayout: 569 Watchdog cannot be stopped once started 570 (default=kernel config parameter) 571 572 ------------------------------------------------- 573 574 scx200_wdt: 575 margin: 576 Watchdog margin in seconds 577 nowayout: 578 Disable watchdog shutdown on close 579 580 ------------------------------------------------- 581 582 shwdt: 583 clock_division_ratio: 584 Clock division ratio. Valid ranges are from 0x5 (1.31ms) 585 to 0x7 (5.25ms). (default=7) 586 heartbeat: 587 Watchdog heartbeat in seconds. (1 <= heartbeat <= 3600, default=30 588 nowayout: 589 Watchdog cannot be stopped once started 590 (default=kernel config parameter) 591 592 ------------------------------------------------- 593 594 smsc37b787_wdt: 595 timeout: 596 range is 1-255 units, default is 60 597 nowayout: 598 Watchdog cannot be stopped once started 599 (default=kernel config parameter) 600 601 ------------------------------------------------- 602 603 softdog: 604 soft_margin: 605 Watchdog soft_margin in seconds. 606 (0 < soft_margin < 65536, default=60) 607 nowayout: 608 Watchdog cannot be stopped once started 609 (default=kernel config parameter) 610 soft_noboot: 611 Softdog action, set to 1 to ignore reboots, 0 to reboot 612 (default=0) 613 614 ------------------------------------------------- 615 616 stmp3xxx_wdt: 617 heartbeat: 618 Watchdog heartbeat period in seconds from 1 to 4194304, default 19 619 620 ------------------------------------------------- 621 622 tegra_wdt: 623 heartbeat: 624 Watchdog heartbeats in seconds. (default = 120) 625 nowayout: 626 Watchdog cannot be stopped once started 627 (default=kernel config parameter) 628 629 ------------------------------------------------- 630 631 ts72xx_wdt: 632 timeout: 633 Watchdog timeout in seconds. (1 <= timeout <= 8, default=8) 634 nowayout: 635 Disable watchdog shutdown on close 636 637 ------------------------------------------------- 638 639 twl4030_wdt: 640 nowayout: 641 Watchdog cannot be stopped once started 642 (default=kernel config parameter) 643 644 ------------------------------------------------- 645 646 txx9wdt: 647 timeout: 648 Watchdog timeout in seconds. (0<timeout<N, default=60) 649 nowayout: 650 Watchdog cannot be stopped once started 651 (default=kernel config parameter) 652 653 ------------------------------------------------- 654 655 uniphier_wdt: 656 timeout: 657 Watchdog timeout in power of two seconds. 658 (1 <= timeout <= 128, default=64) 659 nowayout: 660 Watchdog cannot be stopped once started 661 (default=kernel config parameter) 662 663 ------------------------------------------------- 664 665 w83627hf_wdt: 666 wdt_io: 667 w83627hf/thf WDT io port (default 0x2E) 668 timeout: 669 Watchdog timeout in seconds. 1 <= timeout <= 255, default=60. 670 nowayout: 671 Watchdog cannot be stopped once started 672 (default=kernel config parameter) 673 674 ------------------------------------------------- 675 676 w83877f_wdt: 677 timeout: 678 Watchdog timeout in seconds. (1<=timeout<=3600, default=30) 679 nowayout: 680 Watchdog cannot be stopped once started 681 (default=kernel config parameter) 682 683 ------------------------------------------------- 684 685 w83977f_wdt: 686 timeout: 687 Watchdog timeout in seconds (15..7635), default=45) 688 testmode: 689 Watchdog testmode (1 = no reboot), default=0 690 nowayout: 691 Watchdog cannot be stopped once started 692 (default=kernel config parameter) 693 694 ------------------------------------------------- 695 696 wafer5823wdt: 697 timeout: 698 Watchdog timeout in seconds. 1 <= timeout <= 255, default=60. 699 nowayout: 700 Watchdog cannot be stopped once started 701 (default=kernel config parameter) 702 703 ------------------------------------------------- 704 705 wdt285: 706 soft_margin: 707 Watchdog timeout in seconds (default=60) 708 709 ------------------------------------------------- 710 711 wdt977: 712 timeout: 713 Watchdog timeout in seconds (60..15300, default=60) 714 testmode: 715 Watchdog testmode (1 = no reboot), default=0 716 nowayout: 717 Watchdog cannot be stopped once started 718 (default=kernel config parameter) 719 720 ------------------------------------------------- 721 722 wm831x_wdt: 723 nowayout: 724 Watchdog cannot be stopped once started 725 (default=kernel config parameter) 726 727 ------------------------------------------------- 728 729 wm8350_wdt: 730 nowayout: 731 Watchdog cannot be stopped once started 732 (default=kernel config parameter) 733 734 ------------------------------------------------- 735 736 sun4v_wdt: 737 timeout_ms: 738 Watchdog timeout in milliseconds 1..180000, default=60000) 739 nowayout: 740 Watchdog cannot be stopped once started
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