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 online 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.
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 builtin 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.
168 # X86 (i386 + ia64 + x86_64) Architecture
171 tristate "Acquire SBC Watchdog Timer"
172 depends on WATCHDOG && X86
174 This is the driver for the hardware watchdog on Single Board
175 Computers produced by Acquire Inc (and others). This watchdog
176 simply watches your kernel to make sure it doesn't freeze, and if
177 it does, it reboots your computer after a certain amount of time.
179 To compile this driver as a module, choose M here: the
180 module will be called acquirewdt.
182 Most people will say N.
185 tristate "Advantech SBC Watchdog Timer"
186 depends on WATCHDOG && X86
188 If you are configuring a Linux kernel for the Advantech single-board
189 computer, say `Y' here to support its built-in watchdog timer
190 feature. More information can be found at
191 <http://www.advantech.com.tw/products/>
194 tristate "ALi M1535 PMU Watchdog Timer"
195 depends on WATCHDOG && X86 && PCI
197 This is the driver for the hardware watchdog on the ALi M1535 PMU.
199 To compile this driver as a module, choose M here: the
200 module will be called alim1535_wdt.
202 Most people will say N.
205 tristate "ALi M7101 PMU Computer Watchdog"
206 depends on WATCHDOG && X86 && PCI
208 This is the driver for the hardware watchdog on the ALi M7101 PMU
209 as used in the x86 Cobalt servers.
211 To compile this driver as a module, choose M here: the
212 module will be called alim7101_wdt.
214 Most people will say N.
217 tristate "AMD Elan SC520 processor Watchdog"
218 depends on WATCHDOG && X86
220 This is the driver for the hardware watchdog built in to the
221 AMD "Elan" SC520 microcomputer commonly used in embedded systems.
222 This watchdog simply watches your kernel to make sure it doesn't
223 freeze, and if it does, it reboots your computer after a certain
226 You can compile this driver directly into the kernel, or use
227 it as a module. The module will be called sc520_wdt.
230 tristate "Eurotech CPU-1220/1410 Watchdog Timer"
231 depends on WATCHDOG && X86
233 Enable support for the watchdog timer on the Eurotech CPU-1220 and
234 CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
235 information are at <http://www.eurotech.it/>.
238 tristate "IB700 SBC Watchdog Timer"
239 depends on WATCHDOG && X86
241 This is the driver for the hardware watchdog on the IB700 Single
242 Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
243 simply watches your kernel to make sure it doesn't freeze, and if
244 it does, it reboots your computer after a certain amount of time.
246 This driver is like the WDT501 driver but for slightly different hardware.
248 To compile this driver as a module, choose M here: the
249 module will be called ib700wdt.
251 Most people will say N.
254 tristate "IBM Automatic Server Restart"
255 depends on WATCHDOG && X86
257 This is the driver for the IBM Automatic Server Restart watchdog
258 timer builtin into some eServer xSeries machines.
260 To compile this driver as a module, choose M here: the
261 module will be called ibmasr.
264 tristate "ICP Wafer 5823 Single Board Computer Watchdog"
265 depends on WATCHDOG && X86
267 This is a driver for the hardware watchdog on the ICP Wafer 5823
268 Single Board Computer (and probably other similar models).
270 To compile this driver as a module, choose M here: the
271 module will be called wafer5823wdt.
274 tristate "Intel 6300ESB Timer/Watchdog"
275 depends on WATCHDOG && X86 && PCI
277 Hardware driver for the watchdog timer built into the Intel
278 6300ESB controller hub.
280 To compile this driver as a module, choose M here: the
281 module will be called i6300esb.
284 tristate "Intel i8xx TCO Timer/Watchdog"
285 depends on WATCHDOG && (X86 || IA64) && PCI
287 Hardware driver for the TCO timer built into the Intel 82801
288 I/O Controller Hub family. The TCO (Total Cost of Ownership)
289 timer is a watchdog timer that will reboot the machine after
290 its second expiration. The expiration time can be configured
291 with the "heartbeat" parameter.
293 On some motherboards the driver may fail to reset the chipset's
294 NO_REBOOT flag which prevents the watchdog from rebooting the
295 machine. If this is the case you will get a kernel message like
296 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
298 To compile this driver as a module, choose M here: the
299 module will be called i8xx_tco.
302 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
303 depends on WATCHDOG && X86
305 This is a driver for National Semiconductor PC87307/PC97307 hardware
306 watchdog cards as found on the SC1200. This watchdog is mainly used
307 for power management purposes and can be used to power down the device
308 during inactivity periods (includes interrupt activity monitoring).
310 To compile this driver as a module, choose M here: the
311 module will be called sc1200wdt.
313 Most people will say N.
316 tristate "National Semiconductor SCx200 Watchdog"
317 depends on WATCHDOG && SCx200 && PCI
319 Enable the built-in watchdog timer support on the National
320 Semiconductor SCx200 processors.
322 If compiled as a module, it will be called scx200_wdt.
325 tristate "SBC-60XX Watchdog Timer"
326 depends on WATCHDOG && X86
328 This driver can be used with the watchdog timer found on some
329 single board computers, namely the 6010 PII based computer.
330 It may well work with other cards. It reads port 0x443 to enable
331 and re-set the watchdog timer, and reads port 0x45 to disable
332 the watchdog. If you have a card that behave in similar ways,
333 you can probably make this driver work with your card as well.
335 You can compile this driver directly into the kernel, or use
336 it as a module. The module will be called sbc60xxwdt.
339 tristate "SBC8360 Watchdog Timer"
340 depends on WATCHDOG && X86
343 This is the driver for the hardware watchdog on the SBC8360 Single
344 Board Computer produced by Axiomtek Co., Ltd. (www.axiomtek.com).
346 To compile this driver as a module, choose M here: the
347 module will be called sbc8360.ko.
349 Most people will say N.
352 tristate "SMA CPU5 Watchdog"
353 depends on WATCHDOG && X86
356 To compile this driver as a module, choose M here: the
357 module will be called cpu5wdt.
360 tristate "W83627HF Watchdog Timer"
361 depends on WATCHDOG && X86
363 This is the driver for the hardware watchdog on the W83627HF chipset
364 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
365 (and likely others). This watchdog simply watches your kernel to
366 make sure it doesn't freeze, and if it does, it reboots your computer
367 after a certain amount of time.
369 To compile this driver as a module, choose M here: the
370 module will be called w83627hf_wdt.
372 Most people will say N.
375 tristate "W83877F (EMACS) Watchdog Timer"
376 depends on WATCHDOG && X86
378 This is the driver for the hardware watchdog on the W83877F chipset
379 as used in EMACS PC-104 motherboards (and likely others). This
380 watchdog simply watches your kernel to make sure it doesn't freeze,
381 and if it does, it reboots your computer after a certain amount of
384 To compile this driver as a module, choose M here: the
385 module will be called w83877f_wdt.
387 Most people will say N.
390 tristate "W83977F (PCM-5335) Watchdog Timer"
391 depends on WATCHDOG && X86
393 This is the driver for the hardware watchdog on the W83977F I/O chip
394 as used in AAEON's PCM-5335 SBC (and likely others). This
395 watchdog simply watches your kernel to make sure it doesn't freeze,
396 and if it does, it reboots your computer after a certain amount of
399 To compile this driver as a module, choose M here: the
400 module will be called w83977f_wdt.
403 tristate "ZF MachZ Watchdog"
404 depends on WATCHDOG && X86
406 If you are using a ZF Micro MachZ processor, say Y here, otherwise
407 N. This is the driver for the watchdog timer builtin on that
408 processor using ZF-Logic interface. This watchdog simply watches
409 your kernel to make sure it doesn't freeze, and if it does, it
410 reboots your computer after a certain amount of time.
412 To compile this driver as a module, choose M here: the
413 module will be called machzwd.
415 config SBC_EPX_C3_WATCHDOG
416 tristate "Winsystems SBC EPX-C3 watchdog"
417 depends on WATCHDOG && X86
419 This is the driver for the built-in watchdog timer on the EPX-C3
420 Single-board computer made by Winsystems, Inc.
422 *Note*: This hardware watchdog is not probeable and thus there
423 is no way to know if writing to its IO address will corrupt
424 your system or have any real effect. The only way to be sure
425 that this driver does what you want is to make sure you
426 are running it on an EPX-C3 from Winsystems with the watchdog
427 timer at IO address 0x1ee and 0x1ef. It will write to both those
428 IO ports. Basically, the assumption is made that if you compile
429 this driver into your kernel and/or load it as a module, that you
430 know what you are doing and that you are in fact running on an
433 To compile this driver as a module, choose M here: the
434 module will be called sbc_epx_c3.
437 # PowerPC Architecture
440 tristate "MPC8xx Watchdog Timer"
441 depends on WATCHDOG && 8xx
444 tristate "MPC83xx Watchdog Timer"
445 depends on WATCHDOG && PPC_83xx
448 tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
449 depends on WATCHDOG && MV64X60
452 tristate "PowerPC Book-E Watchdog Timer"
453 depends on WATCHDOG && (BOOKE || 4xx)
455 Please see Documentation/watchdog/watchdog-api.txt for
461 tristate "RTAS watchdog"
462 depends on WATCHDOG && PPC_RTAS
464 This driver adds watchdog support for the RTAS watchdog.
466 To compile this driver as a module, choose M here. The module
467 will be called wdrtas.
472 tristate "Indy/I2 Hardware Watchdog"
473 depends on WATCHDOG && SGI_IP22
475 Hardware driver for the Indy's/I2's watchdog. This is a
476 watchdog timer that will reboot the machine after a 60 second
477 timer expired and no process has written to /dev/watchdog during
483 tristate "z/VM Watchdog Timer"
484 depends on WATCHDOG && S390
486 IBM s/390 and zSeries machines running under z/VM 5.1 or later
487 provide a virtual watchdog timer to their guest that cause a
488 user define Control Program command to be executed after a
491 To compile this driver as a module, choose M here. The module
492 will be called vmwatchdog.
494 # SUPERH Architecture
497 tristate "SuperH Watchdog"
498 depends on WATCHDOG && SUPERH
500 This driver adds watchdog support for the integrated watchdog in the
501 SuperH processors. If you have one of these processors and wish
502 to have watchdog support enabled, say Y, otherwise say N.
504 As a side note, saying Y here will automatically boost HZ to 1000
505 so that the timer has a chance to clear the overflow counter. On
506 slower systems (such as the SH-2 and SH-3) this will likely yield
507 some performance issues. As such, the WDT should be avoided here
508 unless it is absolutely necessary.
510 To compile this driver as a module, choose M here: the
511 module will be called shwdt.
513 # SPARC64 Architecture
515 config WATCHDOG_CP1XXX
516 tristate "CP1XXX Hardware Watchdog support"
517 depends on WATCHDOG && SPARC64 && PCI
519 This is the driver for the hardware watchdog timers present on
520 Sun Microsystems CompactPCI models CP1400 and CP1500.
522 To compile this driver as a module, choose M here: the
523 module will be called cpwatchdog.
525 If you do not have a CompactPCI model CP1400 or CP1500, or
526 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
527 you should say N to this option.
530 tristate "RIO Hardware Watchdog support"
531 depends on WATCHDOG && SPARC64 && PCI
533 Say Y here to support the hardware watchdog capability on Sun RIO
534 machines. The watchdog timeout period is normally one minute but
535 can be changed with a boot-time parameter.
538 # ISA-based Watchdog Cards
541 comment "ISA-based Watchdog Cards"
542 depends on WATCHDOG && ISA
545 tristate "Berkshire Products ISA-PC Watchdog"
546 depends on WATCHDOG && ISA
548 This is the driver for the Berkshire Products ISA-PC Watchdog card.
549 This card simply watches your kernel to make sure it doesn't freeze,
550 and if it does, it reboots your computer after a certain amount of
551 time. This driver is like the WDT501 driver but for different
552 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
553 watchdog cards can be ordered from <http://www.berkprod.com/>.
555 To compile this driver as a module, choose M here: the
556 module will be called pcwd.
558 Most people will say N.
561 tristate "Mixcom Watchdog"
562 depends on WATCHDOG && ISA
564 This is a driver for the Mixcom hardware watchdog cards. This
565 watchdog simply watches your kernel to make sure it doesn't freeze,
566 and if it does, it reboots your computer after a certain amount of
569 To compile this driver as a module, choose M here: the
570 module will be called mixcomwd.
572 Most people will say N.
575 tristate "WDT Watchdog timer"
576 depends on WATCHDOG && ISA
578 If you have a WDT500P or WDT501P watchdog board, say Y here,
579 otherwise N. It is not possible to probe for this board, which means
580 that you have to inform the kernel about the IO port and IRQ that
581 is needed (you can do this via the io and irq parameters)
583 To compile this driver as a module, choose M here: the
584 module will be called wdt.
587 bool "WDT501 features"
590 Saying Y here and creating a character special file /dev/temperature
591 with major number 10 and minor number 131 ("man mknod") will give
592 you a thermometer inside your computer: reading from
593 /dev/temperature yields one byte, the temperature in degrees
594 Fahrenheit. This works only if you have a WDT501P watchdog board
597 If you want to enable the Fan Tachometer on the WDT501P, then you
598 can do this via the tachometer parameter. Only do this if you have a
599 fan tachometer actually set up.
602 # PCI-based Watchdog Cards
605 comment "PCI-based Watchdog Cards"
606 depends on WATCHDOG && PCI
609 tristate "Berkshire Products PCI-PC Watchdog"
610 depends on WATCHDOG && PCI
612 This is the driver for the Berkshire Products PCI-PC Watchdog card.
613 This card simply watches your kernel to make sure it doesn't freeze,
614 and if it does, it reboots your computer after a certain amount of
615 time. The card can also monitor the internal temperature of the PC.
616 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
618 To compile this driver as a module, choose M here: the
619 module will be called pcwd_pci.
621 Most people will say N.
624 tristate "PCI-WDT500/501 Watchdog timer"
625 depends on WATCHDOG && PCI
627 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
629 To compile this driver as a module, choose M here: the
630 module will be called wdt_pci.
633 bool "PCI-WDT501 features"
636 Saying Y here and creating a character special file /dev/temperature
637 with major number 10 and minor number 131 ("man mknod") will give
638 you a thermometer inside your computer: reading from
639 /dev/temperature yields one byte, the temperature in degrees
640 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
643 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
644 can do this via the tachometer parameter. Only do this if you have a
645 fan tachometer actually set up.
648 # USB-based Watchdog Cards
651 comment "USB-based Watchdog Cards"
652 depends on WATCHDOG && USB
655 tristate "Berkshire Products USB-PC Watchdog"
656 depends on WATCHDOG && USB
658 This is the driver for the Berkshire Products USB-PC Watchdog card.
659 This card simply watches your kernel to make sure it doesn't freeze,
660 and if it does, it reboots your computer after a certain amount of
661 time. The card can also monitor the internal temperature of the PC.
662 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
664 To compile this driver as a module, choose M here: the
665 module will be called pcwd_usb.
667 Most people will say N.