2 # Watchdog device configuration
8 bool "Watchdog Timer Support"
10 If you say Y here (and to one of the following options) and create a
11 character special file /dev/watchdog with major number 10 and minor
12 number 130 using mknod ("man mknod"), you will get a watchdog, i.e.:
13 subsequently opening the file and then failing to write to it for
14 longer than 1 minute will result in rebooting the machine. This
15 could be useful for a networked machine that needs to come back
16 on-line as fast as possible after a lock-up. There's both a watchdog
17 implementation entirely in software (which can sometimes fail to
18 reboot the machine) and a driver for hardware watchdog boards, which
19 are more robust and can also keep track of the temperature inside
20 your computer. For details, read <file:Documentation/watchdog/watchdog.txt>
23 The watchdog is usually used together with the watchdog daemon
24 which is available from
25 <ftp://ibiblio.org/pub/Linux/system/daemons/watchdog/>. This daemon can
26 also monitor NFS connections and can reboot the machine when the process
31 config WATCHDOG_NOWAYOUT
32 bool "Disable watchdog shutdown on close"
35 The default watchdog behaviour (which you get if you say N here) is
36 to stop the timer if the process managing it closes the file
37 /dev/watchdog. It's always remotely possible that this process might
38 get killed. If you say Y here, the watchdog cannot be stopped once
42 # General Watchdog drivers
45 comment "Watchdog Device Drivers"
48 # Architecture Independent
51 tristate "Software watchdog"
54 A software monitoring watchdog. This will fail to reboot your system
55 from some situations that the hardware watchdog will recover
56 from. Equally it's a lot cheaper to install.
58 To compile this driver as a module, choose M here: the
59 module will be called softdog.
63 config AT91RM9200_WATCHDOG
64 tristate "AT91RM9200 watchdog"
65 depends on WATCHDOG && ARCH_AT91RM9200
67 Watchdog timer embedded into AT91RM9200 chips. This will reboot your
68 system when the timeout is reached.
71 tristate "DC21285 watchdog"
72 depends on WATCHDOG && FOOTBRIDGE
74 The Intel Footbridge chip contains a built-in watchdog circuit. Say Y
75 here if you wish to use this. Alternatively say M to compile the
76 driver as a module, which will be called wdt285.
78 This driver does not work on all machines. In particular, early CATS
79 boards have hardware problems that will cause the machine to simply
80 lock up if the watchdog fires.
82 "If in doubt, leave it out" - say N.
85 tristate "NetWinder WB83C977 watchdog"
86 depends on WATCHDOG && FOOTBRIDGE && ARCH_NETWINDER
88 Say Y here to include support for the WB977 watchdog included in
89 NetWinder machines. Alternatively say M to compile the driver as
90 a module, which will be called wdt977.
92 Not sure? It's safe to say N.
94 config IXP2000_WATCHDOG
95 tristate "IXP2000 Watchdog"
96 depends on WATCHDOG && ARCH_IXP2000
98 Say Y here if to include support for the watchdog timer
99 in the Intel IXP2000(2400, 2800, 2850) network processors.
100 This driver can be built as a module by choosing M. The module
101 will be called ixp2000_wdt.
103 Say N if you are unsure.
105 config IXP4XX_WATCHDOG
106 tristate "IXP4xx Watchdog"
107 depends on WATCHDOG && ARCH_IXP4XX
109 Say Y here if to include support for the watchdog timer
110 in the Intel IXP4xx network processors. This driver can
111 be built as a module by choosing M. The module will
112 be called ixp4xx_wdt.
114 Note: The internal IXP4xx watchdog does a soft CPU reset
115 which doesn't reset any peripherals. There are circumstances
116 where the watchdog will fail to reset the board correctly
117 (e.g., if the boot ROM is in an unreadable state).
119 Say N if you are unsure.
121 config S3C2410_WATCHDOG
122 tristate "S3C2410 Watchdog"
123 depends on WATCHDOG && ARCH_S3C2410
125 Watchdog timer block in the Samsung S3C2410 chips. This will
126 reboot the system when the timer expires with the watchdog
129 The driver is limited by the speed of the system's PCLK
130 signal, so with reasonably fast systems (PCLK around 50-66MHz)
131 then watchdog intervals of over approximately 20seconds are
134 The driver can be built as a module by choosing M, and will
135 be called s3c2410_wdt
137 config SA1100_WATCHDOG
138 tristate "SA1100/PXA2xx watchdog"
139 depends on WATCHDOG && ( ARCH_SA1100 || ARCH_PXA )
141 Watchdog timer embedded into SA11x0 and PXA2xx chips. This will
142 reboot your system when timeout is reached.
144 NOTE: once enabled, this timer cannot be disabled.
146 To compile this driver as a module, choose M here: the
147 module will be called sa1100_wdt.
149 config MPCORE_WATCHDOG
150 tristate "MPcore watchdog"
151 depends on WATCHDOG && ARM_MPCORE_PLATFORM && LOCAL_TIMERS
153 Watchdog timer embedded into the MPcore system.
155 To compile this driver as a module, choose M here: the
156 module will be called mpcore_wdt.
158 config EP93XX_WATCHDOG
159 tristate "EP93xx Watchdog"
160 depends on WATCHDOG && ARCH_EP93XX
162 Say Y here if to include support for the watchdog timer
163 embedded in the Cirrus Logic EP93xx family of devices.
165 To compile this driver as a module, choose M here: the
166 module will be called ep93xx_wdt.
169 tristate "OMAP Watchdog"
170 depends on WATCHDOG && (ARCH_OMAP16XX || ARCH_OMAP24XX)
172 Support for TI OMAP1610/OMAP1710/OMAP2420 watchdog. Say 'Y' here to
173 enable the OMAP1610/OMAP1710 watchdog timer.
175 config PNX4008_WATCHDOG
176 tristate "PNX4008 Watchdog"
177 depends on WATCHDOG && ARCH_PNX4008
179 Say Y here if to include support for the watchdog timer
180 in the PNX4008 processor.
181 This driver can be built as a module by choosing M. The module
182 will be called pnx4008_wdt.
184 Say N if you are unsure.
186 # X86 (i386 + ia64 + x86_64) Architecture
189 tristate "Acquire SBC Watchdog Timer"
190 depends on WATCHDOG && X86
192 This is the driver for the hardware watchdog on Single Board
193 Computers produced by Acquire Inc (and others). This watchdog
194 simply watches your kernel to make sure it doesn't freeze, and if
195 it does, it reboots your computer after a certain amount of time.
197 To compile this driver as a module, choose M here: the
198 module will be called acquirewdt.
200 Most people will say N.
203 tristate "Advantech SBC Watchdog Timer"
204 depends on WATCHDOG && X86
206 If you are configuring a Linux kernel for the Advantech single-board
207 computer, say `Y' here to support its built-in watchdog timer
208 feature. More information can be found at
209 <http://www.advantech.com.tw/products/>
212 tristate "ALi M1535 PMU Watchdog Timer"
213 depends on WATCHDOG && X86 && PCI
215 This is the driver for the hardware watchdog on the ALi M1535 PMU.
217 To compile this driver as a module, choose M here: the
218 module will be called alim1535_wdt.
220 Most people will say N.
223 tristate "ALi M7101 PMU Computer Watchdog"
224 depends on WATCHDOG && X86 && PCI
226 This is the driver for the hardware watchdog on the ALi M7101 PMU
227 as used in the x86 Cobalt servers.
229 To compile this driver as a module, choose M here: the
230 module will be called alim7101_wdt.
232 Most people will say N.
235 tristate "AMD Elan SC520 processor Watchdog"
236 depends on WATCHDOG && X86
238 This is the driver for the hardware watchdog built in to the
239 AMD "Elan" SC520 microcomputer commonly used in embedded systems.
240 This watchdog simply watches your kernel to make sure it doesn't
241 freeze, and if it does, it reboots your computer after a certain
244 You can compile this driver directly into the kernel, or use
245 it as a module. The module will be called sc520_wdt.
248 tristate "Eurotech CPU-1220/1410 Watchdog Timer"
249 depends on WATCHDOG && X86
251 Enable support for the watchdog timer on the Eurotech CPU-1220 and
252 CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
253 information are at <http://www.eurotech.it/>.
256 tristate "IB700 SBC Watchdog Timer"
257 depends on WATCHDOG && X86
259 This is the driver for the hardware watchdog on the IB700 Single
260 Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
261 simply watches your kernel to make sure it doesn't freeze, and if
262 it does, it reboots your computer after a certain amount of time.
264 This driver is like the WDT501 driver but for slightly different hardware.
266 To compile this driver as a module, choose M here: the
267 module will be called ib700wdt.
269 Most people will say N.
272 tristate "IBM Automatic Server Restart"
273 depends on WATCHDOG && X86
275 This is the driver for the IBM Automatic Server Restart watchdog
276 timer built-in into some eServer xSeries machines.
278 To compile this driver as a module, choose M here: the
279 module will be called ibmasr.
282 tristate "ICP Wafer 5823 Single Board Computer Watchdog"
283 depends on WATCHDOG && X86
285 This is a driver for the hardware watchdog on the ICP Wafer 5823
286 Single Board Computer (and probably other similar models).
288 To compile this driver as a module, choose M here: the
289 module will be called wafer5823wdt.
292 tristate "Intel 6300ESB Timer/Watchdog"
293 depends on WATCHDOG && X86 && PCI
295 Hardware driver for the watchdog timer built into the Intel
296 6300ESB controller hub.
298 To compile this driver as a module, choose M here: the
299 module will be called i6300esb.
302 tristate "Intel i8xx TCO Timer/Watchdog"
303 depends on WATCHDOG && (X86 || IA64) && PCI
305 Hardware driver for the TCO timer built into the Intel 82801
306 I/O Controller Hub family. The TCO (Total Cost of Ownership)
307 timer is a watchdog timer that will reboot the machine after
308 its second expiration. The expiration time can be configured
309 with the "heartbeat" parameter.
311 On some motherboards the driver may fail to reset the chipset's
312 NO_REBOOT flag which prevents the watchdog from rebooting the
313 machine. If this is the case you will get a kernel message like
314 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
316 To compile this driver as a module, choose M here: the
317 module will be called i8xx_tco.
319 Note: This driver will be removed in the near future. Please
320 use the Intel TCO Timer/Watchdog driver.
323 tristate "Intel TCO Timer/Watchdog"
324 depends on WATCHDOG && (X86 || IA64) && PCI
326 Hardware driver for the intel TCO timer based watchdog devices.
327 These drivers are included in the Intel 82801 I/O Controller
328 Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB
331 The TCO (Total Cost of Ownership) timer is a watchdog timer
332 that will reboot the machine after its second expiration. The
333 expiration time can be configured with the "heartbeat" parameter.
335 On some motherboards the driver may fail to reset the chipset's
336 NO_REBOOT flag which prevents the watchdog from rebooting the
337 machine. If this is the case you will get a kernel message like
338 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
340 To compile this driver as a module, choose M here: the
341 module will be called iTCO_wdt.
343 config ITCO_VENDOR_SUPPORT
344 bool "Intel TCO Timer/Watchdog Specific Vendor Support"
347 Add vendor specific support to the intel TCO timer based watchdog
348 devices. At this moment we only have additional support for some
349 SuperMicro Inc. motherboards.
352 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
353 depends on WATCHDOG && X86
355 This is a driver for National Semiconductor PC87307/PC97307 hardware
356 watchdog cards as found on the SC1200. This watchdog is mainly used
357 for power management purposes and can be used to power down the device
358 during inactivity periods (includes interrupt activity monitoring).
360 To compile this driver as a module, choose M here: the
361 module will be called sc1200wdt.
363 Most people will say N.
366 tristate "National Semiconductor SCx200 Watchdog"
367 depends on WATCHDOG && SCx200 && PCI
369 Enable the built-in watchdog timer support on the National
370 Semiconductor SCx200 processors.
372 If compiled as a module, it will be called scx200_wdt.
375 tristate "NS PC87413 watchdog"
376 depends on WATCHDOG && X86
378 This is the driver for the hardware watchdog on the PC87413 chipset
379 This watchdog simply watches your kernel to make sure it doesn't
380 freeze, and if it does, it reboots your computer after a certain
383 To compile this driver as a module, choose M here: the
384 module will be called pc87413_wdt.
386 Most people will say N.
389 tristate "SBC-60XX Watchdog Timer"
390 depends on WATCHDOG && X86
392 This driver can be used with the watchdog timer found on some
393 single board computers, namely the 6010 PII based computer.
394 It may well work with other cards. It reads port 0x443 to enable
395 and re-set the watchdog timer, and reads port 0x45 to disable
396 the watchdog. If you have a card that behave in similar ways,
397 you can probably make this driver work with your card as well.
399 You can compile this driver directly into the kernel, or use
400 it as a module. The module will be called sbc60xxwdt.
403 tristate "SBC8360 Watchdog Timer"
404 depends on WATCHDOG && X86
407 This is the driver for the hardware watchdog on the SBC8360 Single
408 Board Computer produced by Axiomtek Co., Ltd. (www.axiomtek.com).
410 To compile this driver as a module, choose M here: the
411 module will be called sbc8360.ko.
413 Most people will say N.
416 tristate "SMA CPU5 Watchdog"
417 depends on WATCHDOG && X86
420 To compile this driver as a module, choose M here: the
421 module will be called cpu5wdt.
423 config SMSC37B787_WDT
424 tristate "Winbond SMsC37B787 Watchdog Timer"
425 depends on WATCHDOG && X86
427 This is the driver for the hardware watchdog component on the
428 Winbond SMsC37B787 chipset as used on the NetRunner Mainboard
429 from Vision Systems and maybe others.
431 This watchdog simply watches your kernel to make sure it doesn't
432 freeze, and if it does, it reboots your computer after a certain
435 Usually a userspace daemon will notify the kernel WDT driver that
436 userspace is still alive, at regular intervals.
438 To compile this driver as a module, choose M here: the
439 module will be called smsc37b787_wdt.
441 Most people will say N.
444 tristate "W83627HF Watchdog Timer"
445 depends on WATCHDOG && X86
447 This is the driver for the hardware watchdog on the W83627HF chipset
448 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
449 (and likely others). This watchdog simply watches your kernel to
450 make sure it doesn't freeze, and if it does, it reboots your computer
451 after a certain amount of time.
453 To compile this driver as a module, choose M here: the
454 module will be called w83627hf_wdt.
456 Most people will say N.
459 tristate "W83697HF/W83697HG Watchdog Timer"
460 depends on WATCHDOG && X86
462 This is the driver for the hardware watchdog on the W83697HF/HG
463 chipset as used in Dedibox/VIA motherboards (and likely others).
464 This watchdog simply watches your kernel to make sure it doesn't
465 freeze, and if it does, it reboots your computer after a certain
468 To compile this driver as a module, choose M here: the
469 module will be called w83697hf_wdt.
471 Most people will say N.
474 tristate "W83877F (EMACS) Watchdog Timer"
475 depends on WATCHDOG && X86
477 This is the driver for the hardware watchdog on the W83877F chipset
478 as used in EMACS PC-104 motherboards (and likely others). This
479 watchdog simply watches your kernel to make sure it doesn't freeze,
480 and if it does, it reboots your computer after a certain amount of
483 To compile this driver as a module, choose M here: the
484 module will be called w83877f_wdt.
486 Most people will say N.
489 tristate "W83977F (PCM-5335) Watchdog Timer"
490 depends on WATCHDOG && X86
492 This is the driver for the hardware watchdog on the W83977F I/O chip
493 as used in AAEON's PCM-5335 SBC (and likely others). This
494 watchdog simply watches your kernel to make sure it doesn't freeze,
495 and if it does, it reboots your computer after a certain amount of
498 To compile this driver as a module, choose M here: the
499 module will be called w83977f_wdt.
502 tristate "ZF MachZ Watchdog"
503 depends on WATCHDOG && X86
505 If you are using a ZF Micro MachZ processor, say Y here, otherwise
506 N. This is the driver for the watchdog timer built-in on that
507 processor using ZF-Logic interface. This watchdog simply watches
508 your kernel to make sure it doesn't freeze, and if it does, it
509 reboots your computer after a certain amount of time.
511 To compile this driver as a module, choose M here: the
512 module will be called machzwd.
514 config SBC_EPX_C3_WATCHDOG
515 tristate "Winsystems SBC EPX-C3 watchdog"
516 depends on WATCHDOG && X86
518 This is the driver for the built-in watchdog timer on the EPX-C3
519 Single-board computer made by Winsystems, Inc.
521 *Note*: This hardware watchdog is not probeable and thus there
522 is no way to know if writing to its IO address will corrupt
523 your system or have any real effect. The only way to be sure
524 that this driver does what you want is to make sure you
525 are running it on an EPX-C3 from Winsystems with the watchdog
526 timer at IO address 0x1ee and 0x1ef. It will write to both those
527 IO ports. Basically, the assumption is made that if you compile
528 this driver into your kernel and/or load it as a module, that you
529 know what you are doing and that you are in fact running on an
532 To compile this driver as a module, choose M here: the
533 module will be called sbc_epx_c3.
535 # PowerPC Architecture
538 tristate "MPC8xx Watchdog Timer"
539 depends on WATCHDOG && 8xx
542 tristate "MPC83xx Watchdog Timer"
543 depends on WATCHDOG && PPC_83xx
546 tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
547 depends on WATCHDOG && MV64X60
550 tristate "PowerPC Book-E Watchdog Timer"
551 depends on WATCHDOG && (BOOKE || 4xx)
553 Please see Documentation/watchdog/watchdog-api.txt for
559 tristate "RTAS watchdog"
560 depends on WATCHDOG && PPC_RTAS
562 This driver adds watchdog support for the RTAS watchdog.
564 To compile this driver as a module, choose M here. The module
565 will be called wdrtas.
570 tristate "Indy/I2 Hardware Watchdog"
571 depends on WATCHDOG && SGI_IP22
573 Hardware driver for the Indy's/I2's watchdog. This is a
574 watchdog timer that will reboot the machine after a 60 second
575 timer expired and no process has written to /dev/watchdog during
579 tristate "RM9000/GPI hardware watchdog"
580 depends on WATCHDOG && CPU_RM9000
582 Watchdog implementation using the GPI hardware found on
583 PMC-Sierra RM9xxx CPUs.
585 To compile this driver as a module, choose M here: the
586 module will be called rm9k_wdt.
591 tristate "z/VM Watchdog Timer"
592 depends on WATCHDOG && S390
594 IBM s/390 and zSeries machines running under z/VM 5.1 or later
595 provide a virtual watchdog timer to their guest that cause a
596 user define Control Program command to be executed after a
599 To compile this driver as a module, choose M here. The module
600 will be called vmwatchdog.
602 # SUPERH Architecture
605 tristate "SuperH Watchdog"
606 depends on WATCHDOG && SUPERH
608 This driver adds watchdog support for the integrated watchdog in the
609 SuperH processors. If you have one of these processors and wish
610 to have watchdog support enabled, say Y, otherwise say N.
612 As a side note, saying Y here will automatically boost HZ to 1000
613 so that the timer has a chance to clear the overflow counter. On
614 slower systems (such as the SH-2 and SH-3) this will likely yield
615 some performance issues. As such, the WDT should be avoided here
616 unless it is absolutely necessary.
618 To compile this driver as a module, choose M here: the
619 module will be called shwdt.
622 bool "Allow mmap of SH WDT"
626 If you say Y here, user applications will be able to mmap the
629 # SPARC64 Architecture
631 config WATCHDOG_CP1XXX
632 tristate "CP1XXX Hardware Watchdog support"
633 depends on WATCHDOG && SPARC64 && PCI
635 This is the driver for the hardware watchdog timers present on
636 Sun Microsystems CompactPCI models CP1400 and CP1500.
638 To compile this driver as a module, choose M here: the
639 module will be called cpwatchdog.
641 If you do not have a CompactPCI model CP1400 or CP1500, or
642 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
643 you should say N to this option.
646 tristate "RIO Hardware Watchdog support"
647 depends on WATCHDOG && SPARC64 && PCI
649 Say Y here to support the hardware watchdog capability on Sun RIO
650 machines. The watchdog timeout period is normally one minute but
651 can be changed with a boot-time parameter.
654 # ISA-based Watchdog Cards
657 comment "ISA-based Watchdog Cards"
658 depends on WATCHDOG && ISA
661 tristate "Berkshire Products ISA-PC Watchdog"
662 depends on WATCHDOG && ISA
664 This is the driver for the Berkshire Products ISA-PC Watchdog card.
665 This card simply watches your kernel to make sure it doesn't freeze,
666 and if it does, it reboots your computer after a certain amount of
667 time. This driver is like the WDT501 driver but for different
668 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
669 watchdog cards can be ordered from <http://www.berkprod.com/>.
671 To compile this driver as a module, choose M here: the
672 module will be called pcwd.
674 Most people will say N.
677 tristate "Mixcom Watchdog"
678 depends on WATCHDOG && ISA
680 This is a driver for the Mixcom hardware watchdog cards. This
681 watchdog simply watches your kernel to make sure it doesn't freeze,
682 and if it does, it reboots your computer after a certain amount of
685 To compile this driver as a module, choose M here: the
686 module will be called mixcomwd.
688 Most people will say N.
691 tristate "WDT Watchdog timer"
692 depends on WATCHDOG && ISA
694 If you have a WDT500P or WDT501P watchdog board, say Y here,
695 otherwise N. It is not possible to probe for this board, which means
696 that you have to inform the kernel about the IO port and IRQ that
697 is needed (you can do this via the io and irq parameters)
699 To compile this driver as a module, choose M here: the
700 module will be called wdt.
703 bool "WDT501 features"
706 Saying Y here and creating a character special file /dev/temperature
707 with major number 10 and minor number 131 ("man mknod") will give
708 you a thermometer inside your computer: reading from
709 /dev/temperature yields one byte, the temperature in degrees
710 Fahrenheit. This works only if you have a WDT501P watchdog board
713 If you want to enable the Fan Tachometer on the WDT501P, then you
714 can do this via the tachometer parameter. Only do this if you have a
715 fan tachometer actually set up.
718 # PCI-based Watchdog Cards
721 comment "PCI-based Watchdog Cards"
722 depends on WATCHDOG && PCI
725 tristate "Berkshire Products PCI-PC Watchdog"
726 depends on WATCHDOG && PCI
728 This is the driver for the Berkshire Products PCI-PC Watchdog card.
729 This card simply watches your kernel to make sure it doesn't freeze,
730 and if it does, it reboots your computer after a certain amount of
731 time. The card can also monitor the internal temperature of the PC.
732 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
734 To compile this driver as a module, choose M here: the
735 module will be called pcwd_pci.
737 Most people will say N.
740 tristate "PCI-WDT500/501 Watchdog timer"
741 depends on WATCHDOG && PCI
743 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
745 To compile this driver as a module, choose M here: the
746 module will be called wdt_pci.
749 bool "PCI-WDT501 features"
752 Saying Y here and creating a character special file /dev/temperature
753 with major number 10 and minor number 131 ("man mknod") will give
754 you a thermometer inside your computer: reading from
755 /dev/temperature yields one byte, the temperature in degrees
756 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
759 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
760 can do this via the tachometer parameter. Only do this if you have a
761 fan tachometer actually set up.
764 # USB-based Watchdog Cards
767 comment "USB-based Watchdog Cards"
768 depends on WATCHDOG && USB
771 tristate "Berkshire Products USB-PC Watchdog"
772 depends on WATCHDOG && USB
774 This is the driver for the Berkshire Products USB-PC Watchdog card.
775 This card simply watches your kernel to make sure it doesn't freeze,
776 and if it does, it reboots your computer after a certain amount of
777 time. The card can also monitor the internal temperature of the PC.
778 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
780 To compile this driver as a module, choose M here: the
781 module will be called pcwd_usb.
783 Most people will say N.