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
306 Hardware driver for the TCO timer built into the Intel 82801
307 I/O Controller Hub family. The TCO (Total Cost of Ownership)
308 timer is a watchdog timer that will reboot the machine after
309 its second expiration. The expiration time can be configured
310 with the "heartbeat" parameter.
312 On some motherboards the driver may fail to reset the chipset's
313 NO_REBOOT flag which prevents the watchdog from rebooting the
314 machine. If this is the case you will get a kernel message like
315 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
317 To compile this driver as a module, choose M here: the
318 module will be called i8xx_tco.
320 Note: This driver will be removed in the near future. Please
321 use the Intel TCO Timer/Watchdog driver.
324 tristate "Intel TCO Timer/Watchdog"
325 depends on WATCHDOG && (X86 || IA64) && PCI
327 Hardware driver for the intel TCO timer based watchdog devices.
328 These drivers are included in the Intel 82801 I/O Controller
329 Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB
332 The TCO (Total Cost of Ownership) timer is a watchdog timer
333 that will reboot the machine after its second expiration. The
334 expiration time can be configured with the "heartbeat" parameter.
336 On some motherboards the driver may fail to reset the chipset's
337 NO_REBOOT flag which prevents the watchdog from rebooting the
338 machine. If this is the case you will get a kernel message like
339 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
341 To compile this driver as a module, choose M here: the
342 module will be called iTCO_wdt.
344 config ITCO_VENDOR_SUPPORT
345 bool "Intel TCO Timer/Watchdog Specific Vendor Support"
348 Add vendor specific support to the intel TCO timer based watchdog
349 devices. At this moment we only have additional support for some
350 SuperMicro Inc. motherboards.
353 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
354 depends on WATCHDOG && X86
356 This is a driver for National Semiconductor PC87307/PC97307 hardware
357 watchdog cards as found on the SC1200. This watchdog is mainly used
358 for power management purposes and can be used to power down the device
359 during inactivity periods (includes interrupt activity monitoring).
361 To compile this driver as a module, choose M here: the
362 module will be called sc1200wdt.
364 Most people will say N.
367 tristate "National Semiconductor SCx200 Watchdog"
368 depends on WATCHDOG && SCx200 && PCI
370 Enable the built-in watchdog timer support on the National
371 Semiconductor SCx200 processors.
373 If compiled as a module, it will be called scx200_wdt.
376 tristate "NS PC87413 watchdog"
377 depends on WATCHDOG && X86
379 This is the driver for the hardware watchdog on the PC87413 chipset
380 This watchdog simply watches your kernel to make sure it doesn't
381 freeze, and if it does, it reboots your computer after a certain
384 To compile this driver as a module, choose M here: the
385 module will be called pc87413_wdt.
387 Most people will say N.
390 tristate "SBC-60XX Watchdog Timer"
391 depends on WATCHDOG && X86
393 This driver can be used with the watchdog timer found on some
394 single board computers, namely the 6010 PII based computer.
395 It may well work with other cards. It reads port 0x443 to enable
396 and re-set the watchdog timer, and reads port 0x45 to disable
397 the watchdog. If you have a card that behave in similar ways,
398 you can probably make this driver work with your card as well.
400 You can compile this driver directly into the kernel, or use
401 it as a module. The module will be called sbc60xxwdt.
404 tristate "SBC8360 Watchdog Timer"
405 depends on WATCHDOG && X86
408 This is the driver for the hardware watchdog on the SBC8360 Single
409 Board Computer produced by Axiomtek Co., Ltd. (www.axiomtek.com).
411 To compile this driver as a module, choose M here: the
412 module will be called sbc8360.ko.
414 Most people will say N.
417 tristate "SMA CPU5 Watchdog"
418 depends on WATCHDOG && X86
421 To compile this driver as a module, choose M here: the
422 module will be called cpu5wdt.
424 config SMSC37B787_WDT
425 tristate "Winbond SMsC37B787 Watchdog Timer"
426 depends on WATCHDOG && X86
428 This is the driver for the hardware watchdog component on the
429 Winbond SMsC37B787 chipset as used on the NetRunner Mainboard
430 from Vision Systems and maybe others.
432 This watchdog simply watches your kernel to make sure it doesn't
433 freeze, and if it does, it reboots your computer after a certain
436 Usually a userspace daemon will notify the kernel WDT driver that
437 userspace is still alive, at regular intervals.
439 To compile this driver as a module, choose M here: the
440 module will be called smsc37b787_wdt.
442 Most people will say N.
445 tristate "W83627HF Watchdog Timer"
446 depends on WATCHDOG && X86
448 This is the driver for the hardware watchdog on the W83627HF chipset
449 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
450 (and likely others). This watchdog simply watches your kernel to
451 make sure it doesn't freeze, and if it does, it reboots your computer
452 after a certain amount of time.
454 To compile this driver as a module, choose M here: the
455 module will be called w83627hf_wdt.
457 Most people will say N.
460 tristate "W83697HF/W83697HG Watchdog Timer"
461 depends on WATCHDOG && X86
463 This is the driver for the hardware watchdog on the W83697HF/HG
464 chipset as used in Dedibox/VIA motherboards (and likely others).
465 This watchdog simply watches your kernel to make sure it doesn't
466 freeze, and if it does, it reboots your computer after a certain
469 To compile this driver as a module, choose M here: the
470 module will be called w83697hf_wdt.
472 Most people will say N.
475 tristate "W83877F (EMACS) Watchdog Timer"
476 depends on WATCHDOG && X86
478 This is the driver for the hardware watchdog on the W83877F chipset
479 as used in EMACS PC-104 motherboards (and likely others). This
480 watchdog simply watches your kernel to make sure it doesn't freeze,
481 and if it does, it reboots your computer after a certain amount of
484 To compile this driver as a module, choose M here: the
485 module will be called w83877f_wdt.
487 Most people will say N.
490 tristate "W83977F (PCM-5335) Watchdog Timer"
491 depends on WATCHDOG && X86
493 This is the driver for the hardware watchdog on the W83977F I/O chip
494 as used in AAEON's PCM-5335 SBC (and likely others). This
495 watchdog simply watches your kernel to make sure it doesn't freeze,
496 and if it does, it reboots your computer after a certain amount of
499 To compile this driver as a module, choose M here: the
500 module will be called w83977f_wdt.
503 tristate "ZF MachZ Watchdog"
504 depends on WATCHDOG && X86
506 If you are using a ZF Micro MachZ processor, say Y here, otherwise
507 N. This is the driver for the watchdog timer built-in on that
508 processor using ZF-Logic interface. This watchdog simply watches
509 your kernel to make sure it doesn't freeze, and if it does, it
510 reboots your computer after a certain amount of time.
512 To compile this driver as a module, choose M here: the
513 module will be called machzwd.
515 config SBC_EPX_C3_WATCHDOG
516 tristate "Winsystems SBC EPX-C3 watchdog"
517 depends on WATCHDOG && X86
519 This is the driver for the built-in watchdog timer on the EPX-C3
520 Single-board computer made by Winsystems, Inc.
522 *Note*: This hardware watchdog is not probeable and thus there
523 is no way to know if writing to its IO address will corrupt
524 your system or have any real effect. The only way to be sure
525 that this driver does what you want is to make sure you
526 are running it on an EPX-C3 from Winsystems with the watchdog
527 timer at IO address 0x1ee and 0x1ef. It will write to both those
528 IO ports. Basically, the assumption is made that if you compile
529 this driver into your kernel and/or load it as a module, that you
530 know what you are doing and that you are in fact running on an
533 To compile this driver as a module, choose M here: the
534 module will be called sbc_epx_c3.
536 # PowerPC Architecture
539 tristate "MPC8xx Watchdog Timer"
540 depends on WATCHDOG && 8xx
543 tristate "MPC83xx Watchdog Timer"
544 depends on WATCHDOG && PPC_83xx
547 tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
548 depends on WATCHDOG && MV64X60
551 tristate "PowerPC Book-E Watchdog Timer"
552 depends on WATCHDOG && (BOOKE || 4xx)
554 Please see Documentation/watchdog/watchdog-api.txt for
560 tristate "RTAS watchdog"
561 depends on WATCHDOG && PPC_RTAS
563 This driver adds watchdog support for the RTAS watchdog.
565 To compile this driver as a module, choose M here. The module
566 will be called wdrtas.
571 tristate "Indy/I2 Hardware Watchdog"
572 depends on WATCHDOG && SGI_IP22
574 Hardware driver for the Indy's/I2's watchdog. This is a
575 watchdog timer that will reboot the machine after a 60 second
576 timer expired and no process has written to /dev/watchdog during
580 tristate "RM9000/GPI hardware watchdog"
581 depends on WATCHDOG && CPU_RM9000
583 Watchdog implementation using the GPI hardware found on
584 PMC-Sierra RM9xxx CPUs.
586 To compile this driver as a module, choose M here: the
587 module will be called rm9k_wdt.
592 tristate "z/VM Watchdog Timer"
593 depends on WATCHDOG && S390
595 IBM s/390 and zSeries machines running under z/VM 5.1 or later
596 provide a virtual watchdog timer to their guest that cause a
597 user define Control Program command to be executed after a
600 To compile this driver as a module, choose M here. The module
601 will be called vmwatchdog.
603 # SUPERH Architecture
606 tristate "SuperH Watchdog"
607 depends on WATCHDOG && SUPERH
609 This driver adds watchdog support for the integrated watchdog in the
610 SuperH processors. If you have one of these processors and wish
611 to have watchdog support enabled, say Y, otherwise say N.
613 As a side note, saying Y here will automatically boost HZ to 1000
614 so that the timer has a chance to clear the overflow counter. On
615 slower systems (such as the SH-2 and SH-3) this will likely yield
616 some performance issues. As such, the WDT should be avoided here
617 unless it is absolutely necessary.
619 To compile this driver as a module, choose M here: the
620 module will be called shwdt.
623 bool "Allow mmap of SH WDT"
627 If you say Y here, user applications will be able to mmap the
630 # SPARC64 Architecture
632 config WATCHDOG_CP1XXX
633 tristate "CP1XXX Hardware Watchdog support"
634 depends on WATCHDOG && SPARC64 && PCI
636 This is the driver for the hardware watchdog timers present on
637 Sun Microsystems CompactPCI models CP1400 and CP1500.
639 To compile this driver as a module, choose M here: the
640 module will be called cpwatchdog.
642 If you do not have a CompactPCI model CP1400 or CP1500, or
643 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
644 you should say N to this option.
647 tristate "RIO Hardware Watchdog support"
648 depends on WATCHDOG && SPARC64 && PCI
650 Say Y here to support the hardware watchdog capability on Sun RIO
651 machines. The watchdog timeout period is normally one minute but
652 can be changed with a boot-time parameter.
655 # ISA-based Watchdog Cards
658 comment "ISA-based Watchdog Cards"
659 depends on WATCHDOG && ISA
662 tristate "Berkshire Products ISA-PC Watchdog"
663 depends on WATCHDOG && ISA
665 This is the driver for the Berkshire Products ISA-PC Watchdog card.
666 This card simply watches your kernel to make sure it doesn't freeze,
667 and if it does, it reboots your computer after a certain amount of
668 time. This driver is like the WDT501 driver but for different
669 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
670 watchdog cards can be ordered from <http://www.berkprod.com/>.
672 To compile this driver as a module, choose M here: the
673 module will be called pcwd.
675 Most people will say N.
678 tristate "Mixcom Watchdog"
679 depends on WATCHDOG && ISA
681 This is a driver for the Mixcom hardware watchdog cards. This
682 watchdog simply watches your kernel to make sure it doesn't freeze,
683 and if it does, it reboots your computer after a certain amount of
686 To compile this driver as a module, choose M here: the
687 module will be called mixcomwd.
689 Most people will say N.
692 tristate "WDT Watchdog timer"
693 depends on WATCHDOG && ISA
695 If you have a WDT500P or WDT501P watchdog board, say Y here,
696 otherwise N. It is not possible to probe for this board, which means
697 that you have to inform the kernel about the IO port and IRQ that
698 is needed (you can do this via the io and irq parameters)
700 To compile this driver as a module, choose M here: the
701 module will be called wdt.
704 bool "WDT501 features"
707 Saying Y here and creating a character special file /dev/temperature
708 with major number 10 and minor number 131 ("man mknod") will give
709 you a thermometer inside your computer: reading from
710 /dev/temperature yields one byte, the temperature in degrees
711 Fahrenheit. This works only if you have a WDT501P watchdog board
714 If you want to enable the Fan Tachometer on the WDT501P, then you
715 can do this via the tachometer parameter. Only do this if you have a
716 fan tachometer actually set up.
719 # PCI-based Watchdog Cards
722 comment "PCI-based Watchdog Cards"
723 depends on WATCHDOG && PCI
726 tristate "Berkshire Products PCI-PC Watchdog"
727 depends on WATCHDOG && PCI
729 This is the driver for the Berkshire Products PCI-PC Watchdog card.
730 This card simply watches your kernel to make sure it doesn't freeze,
731 and if it does, it reboots your computer after a certain amount of
732 time. The card can also monitor the internal temperature of the PC.
733 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
735 To compile this driver as a module, choose M here: the
736 module will be called pcwd_pci.
738 Most people will say N.
741 tristate "PCI-WDT500/501 Watchdog timer"
742 depends on WATCHDOG && PCI
744 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
746 To compile this driver as a module, choose M here: the
747 module will be called wdt_pci.
750 bool "PCI-WDT501 features"
753 Saying Y here and creating a character special file /dev/temperature
754 with major number 10 and minor number 131 ("man mknod") will give
755 you a thermometer inside your computer: reading from
756 /dev/temperature yields one byte, the temperature in degrees
757 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
760 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
761 can do this via the tachometer parameter. Only do this if you have a
762 fan tachometer actually set up.
765 # USB-based Watchdog Cards
768 comment "USB-based Watchdog Cards"
769 depends on WATCHDOG && USB
772 tristate "Berkshire Products USB-PC Watchdog"
773 depends on WATCHDOG && USB
775 This is the driver for the Berkshire Products USB-PC Watchdog card.
776 This card simply watches your kernel to make sure it doesn't freeze,
777 and if it does, it reboots your computer after a certain amount of
778 time. The card can also monitor the internal temperature of the PC.
779 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
781 To compile this driver as a module, choose M here: the
782 module will be called pcwd_usb.
784 Most people will say N.