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 Independant
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 "DC21285 watchdog"
65 depends on WATCHDOG && FOOTBRIDGE
67 The Intel Footbridge chip contains a builtin watchdog circuit. Say Y
68 here if you wish to use this. Alternatively say M to compile the
69 driver as a module, which will be called wdt285.
71 This driver does not work on all machines. In particular, early CATS
72 boards have hardware problems that will cause the machine to simply
73 lock up if the watchdog fires.
75 "If in doubt, leave it out" - say N.
78 tristate "NetWinder WB83C977 watchdog"
79 depends on WATCHDOG && FOOTBRIDGE && ARCH_NETWINDER
81 Say Y here to include support for the WB977 watchdog included in
82 NetWinder machines. Alternatively say M to compile the driver as
83 a module, which will be called wdt977.
85 Not sure? It's safe to say N.
87 config IXP2000_WATCHDOG
88 tristate "IXP2000 Watchdog"
89 depends on WATCHDOG && ARCH_IXP2000
91 Say Y here if to include support for the watchdog timer
92 in the Intel IXP2000(2400, 2800, 2850) network processors.
93 This driver can be built as a module by choosing M. The module
94 will be called ixp2000_wdt.
96 Say N if you are unsure.
98 config IXP4XX_WATCHDOG
99 tristate "IXP4xx Watchdog"
100 depends on WATCHDOG && ARCH_IXP4XX
102 Say Y here if to include support for the watchdog timer
103 in the Intel IXP4xx network processors. This driver can
104 be built as a module by choosing M. The module will
105 be called ixp4xx_wdt.
107 Note: The internal IXP4xx watchdog does a soft CPU reset
108 which doesn't reset any peripherals. There are circumstances
109 where the watchdog will fail to reset the board correctly
110 (e.g., if the boot ROM is in an unreadable state).
112 Say N if you are unsure.
114 config S3C2410_WATCHDOG
115 tristate "S3C2410 Watchdog"
116 depends on WATCHDOG && ARCH_S3C2410
118 Watchdog timer block in the Samsung S3C2410 chips. This will
119 reboot the system when the timer expires with the watchdog
122 The driver is limited by the speed of the system's PCLK
123 signal, so with reasonbaly fast systems (PCLK around 50-66MHz)
124 then watchdog intervals of over approximately 20seconds are
127 The driver can be built as a module by choosing M, and will
128 be called s3c2410_wdt
130 config SA1100_WATCHDOG
131 tristate "SA1100/PXA2xx watchdog"
132 depends on WATCHDOG && ( ARCH_SA1100 || ARCH_PXA )
134 Watchdog timer embedded into SA11x0 and PXA2xx chips. This will
135 reboot your system when timeout is reached.
137 NOTE: once enabled, this timer cannot be disabled.
139 To compile this driver as a module, choose M here: the
140 module will be called sa1100_wdt.
142 config MPCORE_WATCHDOG
143 tristate "MPcore watchdog"
144 depends on WATCHDOG && ARM_MPCORE_PLATFORM && LOCAL_TIMERS
146 Watchdog timer embedded into the MPcore system.
148 To compile this driver as a module, choose M here: the
149 module will be called mpcore_wdt.
151 # X86 (i386 + ia64 + x86_64) Architecture
154 tristate "Acquire SBC Watchdog Timer"
155 depends on WATCHDOG && X86
157 This is the driver for the hardware watchdog on Single Board
158 Computers produced by Acquire Inc (and others). This watchdog
159 simply watches your kernel to make sure it doesn't freeze, and if
160 it does, it reboots your computer after a certain amount of time.
162 To compile this driver as a module, choose M here: the
163 module will be called acquirewdt.
165 Most people will say N.
168 tristate "Advantech SBC Watchdog Timer"
169 depends on WATCHDOG && X86
171 If you are configuring a Linux kernel for the Advantech single-board
172 computer, say `Y' here to support its built-in watchdog timer
173 feature. More information can be found at
174 <http://www.advantech.com.tw/products/>
177 tristate "ALi M1535 PMU Watchdog Timer"
178 depends on WATCHDOG && X86 && PCI
180 This is the driver for the hardware watchdog on the ALi M1535 PMU.
182 To compile this driver as a module, choose M here: the
183 module will be called alim1535_wdt.
185 Most people will say N.
188 tristate "ALi M7101 PMU Computer Watchdog"
189 depends on WATCHDOG && X86 && PCI
191 This is the driver for the hardware watchdog on the ALi M7101 PMU
192 as used in the x86 Cobalt servers.
194 To compile this driver as a module, choose M here: the
195 module will be called alim7101_wdt.
197 Most people will say N.
200 tristate "AMD Elan SC520 processor Watchdog"
201 depends on WATCHDOG && X86
203 This is the driver for the hardware watchdog built in to the
204 AMD "Elan" SC520 microcomputer commonly used in embedded systems.
205 This watchdog simply watches your kernel to make sure it doesn't
206 freeze, and if it does, it reboots your computer after a certain
209 You can compile this driver directly into the kernel, or use
210 it as a module. The module will be called sc520_wdt.
213 tristate "Eurotech CPU-1220/1410 Watchdog Timer"
214 depends on WATCHDOG && X86
216 Enable support for the watchdog timer on the Eurotech CPU-1220 and
217 CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
218 information are at <http://www.eurotech.it/>.
221 tristate "IB700 SBC Watchdog Timer"
222 depends on WATCHDOG && X86
224 This is the driver for the hardware watchdog on the IB700 Single
225 Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
226 simply watches your kernel to make sure it doesn't freeze, and if
227 it does, it reboots your computer after a certain amount of time.
229 This driver is like the WDT501 driver but for slightly different hardware.
231 To compile this driver as a module, choose M here: the
232 module will be called ib700wdt.
234 Most people will say N.
237 tristate "IBM Automatic Server Restart"
238 depends on WATCHDOG && X86
240 This is the driver for the IBM Automatic Server Restart watchdog
241 timer builtin into some eServer xSeries machines.
243 To compile this driver as a module, choose M here: the
244 module will be called ibmasr.
247 tristate "ICP Wafer 5823 Single Board Computer Watchdog"
248 depends on WATCHDOG && X86
250 This is a driver for the hardware watchdog on the ICP Wafer 5823
251 Single Board Computer (and probably other similar models).
253 To compile this driver as a module, choose M here: the
254 module will be called wafer5823wdt.
257 tristate "Intel 6300ESB Timer/Watchdog"
258 depends on WATCHDOG && X86 && PCI
260 Hardware driver for the watchdog timer built into the Intel
261 6300ESB controller hub.
263 To compile this driver as a module, choose M here: the
264 module will be called i6300esb.
267 tristate "Intel i8xx TCO Timer/Watchdog"
268 depends on WATCHDOG && (X86 || IA64) && PCI
270 Hardware driver for the TCO timer built into the Intel 82801
271 I/O Controller Hub family. The TCO (Total Cost of Ownership)
272 timer is a watchdog timer that will reboot the machine after
273 its second expiration. The expiration time can be configured
274 with the "heartbeat" parameter.
276 On some motherboards the driver may fail to reset the chipset's
277 NO_REBOOT flag which prevents the watchdog from rebooting the
278 machine. If this is the case you will get a kernel message like
279 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
281 To compile this driver as a module, choose M here: the
282 module will be called i8xx_tco.
285 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
286 depends on WATCHDOG && X86
288 This is a driver for National Semiconductor PC87307/PC97307 hardware
289 watchdog cards as found on the SC1200. This watchdog is mainly used
290 for power management purposes and can be used to power down the device
291 during inactivity periods (includes interrupt activity monitoring).
293 To compile this driver as a module, choose M here: the
294 module will be called sc1200wdt.
296 Most people will say N.
299 tristate "National Semiconductor SCx200 Watchdog"
300 depends on WATCHDOG && SCx200 && PCI
302 Enable the built-in watchdog timer support on the National
303 Semiconductor SCx200 processors.
305 If compiled as a module, it will be called scx200_wdt.
308 tristate "SBC-60XX Watchdog Timer"
309 depends on WATCHDOG && X86
311 This driver can be used with the watchdog timer found on some
312 single board computers, namely the 6010 PII based computer.
313 It may well work with other cards. It reads port 0x443 to enable
314 and re-set the watchdog timer, and reads port 0x45 to disable
315 the watchdog. If you have a card that behave in similar ways,
316 you can probably make this driver work with your card as well.
318 You can compile this driver directly into the kernel, or use
319 it as a module. The module will be called sbc60xxwdt.
322 tristate "SBC8360 Watchdog Timer"
323 depends on WATCHDOG && X86
326 This is the driver for the hardware watchdog on the SBC8360 Single
327 Board Computer produced by Axiomtek Co., Ltd. (www.axiomtek.com).
329 To compile this driver as a module, choose M here: the
330 module will be called sbc8360.ko.
332 Most people will say N.
335 tristate "SMA CPU5 Watchdog"
336 depends on WATCHDOG && X86
339 To compile this driver as a module, choose M here: the
340 module will be called cpu5wdt.
343 tristate "W83627HF Watchdog Timer"
344 depends on WATCHDOG && X86
346 This is the driver for the hardware watchdog on the W83627HF chipset
347 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
348 (and likely others). This watchdog simply watches your kernel to
349 make sure it doesn't freeze, and if it does, it reboots your computer
350 after a certain amount of time.
352 To compile this driver as a module, choose M here: the
353 module will be called w83627hf_wdt.
355 Most people will say N.
358 tristate "W83877F (EMACS) Watchdog Timer"
359 depends on WATCHDOG && X86
361 This is the driver for the hardware watchdog on the W83877F chipset
362 as used in EMACS PC-104 motherboards (and likely others). This
363 watchdog simply watches your kernel to make sure it doesn't freeze,
364 and if it does, it reboots your computer after a certain amount of
367 To compile this driver as a module, choose M here: the
368 module will be called w83877f_wdt.
370 Most people will say N.
373 tristate "W83977F (PCM-5335) Watchdog Timer"
374 depends on WATCHDOG && X86
376 This is the driver for the hardware watchdog on the W83977F I/O chip
377 as used in AAEON's PCM-5335 SBC (and likely others). This
378 watchdog simply watches your kernel to make sure it doesn't freeze,
379 and if it does, it reboots your computer after a certain amount of
382 To compile this driver as a module, choose M here: the
383 module will be called w83977f_wdt.
386 tristate "ZF MachZ Watchdog"
387 depends on WATCHDOG && X86
389 If you are using a ZF Micro MachZ processor, say Y here, otherwise
390 N. This is the driver for the watchdog timer builtin on that
391 processor using ZF-Logic interface. This watchdog simply watches
392 your kernel to make sure it doesn't freeze, and if it does, it
393 reboots your computer after a certain amount of time.
395 To compile this driver as a module, choose M here: the
396 module will be called machzwd.
398 config SBC_EPX_C3_WATCHDOG
399 tristate "Winsystems SBC EPX-C3 watchdog"
400 depends on WATCHDOG && X86
402 This is the driver for the built-in watchdog timer on the EPX-C3
403 Single-board computer made by Winsystems, Inc.
405 *Note*: This hardware watchdog is not probeable and thus there
406 is no way to know if writing to its IO address will corrupt
407 your system or have any real effect. The only way to be sure
408 that this driver does what you want is to make sure you
409 are runnning it on an EPX-C3 from Winsystems with the watchdog
410 timer at IO address 0x1ee and 0x1ef. It will write to both those
411 IO ports. Basically, the assumption is made that if you compile
412 this driver into your kernel and/or load it as a module, that you
413 know what you are doing and that you are in fact running on an
416 To compile this driver as a module, choose M here: the
417 module will be called sbc_epx_c3.
420 # PowerPC Architecture
423 tristate "MPC8xx Watchdog Timer"
424 depends on WATCHDOG && 8xx
427 tristate "MPC83xx Watchdog Timer"
428 depends on WATCHDOG && PPC_83xx
431 tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
432 depends on WATCHDOG && MV64X60
435 tristate "PowerPC Book-E Watchdog Timer"
436 depends on WATCHDOG && (BOOKE || 4xx)
438 Please see Documentation/watchdog/watchdog-api.txt for
444 tristate "RTAS watchdog"
445 depends on WATCHDOG && PPC_RTAS
447 This driver adds watchdog support for the RTAS watchdog.
449 To compile this driver as a module, choose M here. The module
450 will be called wdrtas.
455 tristate "Indy/I2 Hardware Watchdog"
456 depends on WATCHDOG && SGI_IP22
458 Hardwaredriver for the Indy's/I2's watchdog. This is a
459 watchdog timer that will reboot the machine after a 60 second
460 timer expired and no process has written to /dev/watchdog during
466 tristate "z/VM Watchdog Timer"
467 depends on WATCHDOG && S390
469 IBM s/390 and zSeries machines running under z/VM 5.1 or later
470 provide a virtual watchdog timer to their guest that cause a
471 user define Control Program command to be executed after a
474 To compile this driver as a module, choose M here. The module
475 will be called vmwatchdog.
477 # SUPERH Architecture
480 tristate "SuperH Watchdog"
481 depends on WATCHDOG && SUPERH
483 This driver adds watchdog support for the integrated watchdog in the
484 SuperH processors. If you have one of these processors and wish
485 to have watchdog support enabled, say Y, otherwise say N.
487 As a side note, saying Y here will automatically boost HZ to 1000
488 so that the timer has a chance to clear the overflow counter. On
489 slower systems (such as the SH-2 and SH-3) this will likely yield
490 some performance issues. As such, the WDT should be avoided here
491 unless it is absolutely necessary.
493 To compile this driver as a module, choose M here: the
494 module will be called shwdt.
496 # SPARC64 Architecture
498 config WATCHDOG_CP1XXX
499 tristate "CP1XXX Hardware Watchdog support"
500 depends on WATCHDOG && SPARC64 && PCI
502 This is the driver for the hardware watchdog timers present on
503 Sun Microsystems CompactPCI models CP1400 and CP1500.
505 To compile this driver as a module, choose M here: the
506 module will be called cpwatchdog.
508 If you do not have a CompactPCI model CP1400 or CP1500, or
509 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
510 you should say N to this option.
513 tristate "RIO Hardware Watchdog support"
514 depends on WATCHDOG && SPARC64 && PCI
516 Say Y here to support the hardware watchdog capability on Sun RIO
517 machines. The watchdog timeout period is normally one minute but
518 can be changed with a boot-time parameter.
521 # ISA-based Watchdog Cards
524 comment "ISA-based Watchdog Cards"
525 depends on WATCHDOG && ISA
528 tristate "Berkshire Products ISA-PC Watchdog"
529 depends on WATCHDOG && ISA
531 This is the driver for the Berkshire Products ISA-PC Watchdog card.
532 This card simply watches your kernel to make sure it doesn't freeze,
533 and if it does, it reboots your computer after a certain amount of
534 time. This driver is like the WDT501 driver but for different
535 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
536 watchdog cards can be ordered from <http://www.berkprod.com/>.
538 To compile this driver as a module, choose M here: the
539 module will be called pcwd.
541 Most people will say N.
544 tristate "Mixcom Watchdog"
545 depends on WATCHDOG && ISA
547 This is a driver for the Mixcom hardware watchdog cards. This
548 watchdog simply watches your kernel to make sure it doesn't freeze,
549 and if it does, it reboots your computer after a certain amount of
552 To compile this driver as a module, choose M here: the
553 module will be called mixcomwd.
555 Most people will say N.
558 tristate "WDT Watchdog timer"
559 depends on WATCHDOG && ISA
561 If you have a WDT500P or WDT501P watchdog board, say Y here,
562 otherwise N. It is not possible to probe for this board, which means
563 that you have to inform the kernel about the IO port and IRQ that
564 is needed (you can do this via the io and irq parameters)
566 To compile this driver as a module, choose M here: the
567 module will be called wdt.
570 bool "WDT501 features"
573 Saying Y here and creating a character special file /dev/temperature
574 with major number 10 and minor number 131 ("man mknod") will give
575 you a thermometer inside your computer: reading from
576 /dev/temperature yields one byte, the temperature in degrees
577 Fahrenheit. This works only if you have a WDT501P watchdog board
580 If you want to enable the Fan Tachometer on the WDT501P, then you
581 can do this via the tachometer parameter. Only do this if you have a
582 fan tachometer actually set up.
585 # PCI-based Watchdog Cards
588 comment "PCI-based Watchdog Cards"
589 depends on WATCHDOG && PCI
592 tristate "Berkshire Products PCI-PC Watchdog"
593 depends on WATCHDOG && PCI
595 This is the driver for the Berkshire Products PCI-PC Watchdog card.
596 This card simply watches your kernel to make sure it doesn't freeze,
597 and if it does, it reboots your computer after a certain amount of
598 time. The card can also monitor the internal temperature of the PC.
599 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
601 To compile this driver as a module, choose M here: the
602 module will be called pcwd_pci.
604 Most people will say N.
607 tristate "PCI-WDT500/501 Watchdog timer"
608 depends on WATCHDOG && PCI
610 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
612 To compile this driver as a module, choose M here: the
613 module will be called wdt_pci.
616 bool "PCI-WDT501 features"
619 Saying Y here and creating a character special file /dev/temperature
620 with major number 10 and minor number 131 ("man mknod") will give
621 you a thermometer inside your computer: reading from
622 /dev/temperature yields one byte, the temperature in degrees
623 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
626 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
627 can do this via the tachometer parameter. Only do this if you have a
628 fan tachometer actually set up.
631 # USB-based Watchdog Cards
634 comment "USB-based Watchdog Cards"
635 depends on WATCHDOG && USB
638 tristate "Berkshire Products USB-PC Watchdog"
639 depends on WATCHDOG && USB
641 This is the driver for the Berkshire Products USB-PC Watchdog card.
642 This card simply watches your kernel to make sure it doesn't freeze,
643 and if it does, it reboots your computer after a certain amount of
644 time. The card can also monitor the internal temperature of the PC.
645 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
647 To compile this driver as a module, choose M here: the
648 module will be called pcwd_usb.
650 Most people will say N.