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 config EP93XX_WATCHDOG
152 tristate "EP93xx Watchdog"
153 depends on WATCHDOG && ARCH_EP93XX
155 Say Y here if to include support for the watchdog timer
156 embedded in the Cirrus Logic EP93xx family of devices.
158 To compile this driver as a module, choose M here: the
159 module will be called ep93xx_wdt.
161 # X86 (i386 + ia64 + x86_64) Architecture
164 tristate "Acquire SBC Watchdog Timer"
165 depends on WATCHDOG && X86
167 This is the driver for the hardware watchdog on Single Board
168 Computers produced by Acquire Inc (and others). This watchdog
169 simply watches your kernel to make sure it doesn't freeze, and if
170 it does, it reboots your computer after a certain amount of time.
172 To compile this driver as a module, choose M here: the
173 module will be called acquirewdt.
175 Most people will say N.
178 tristate "Advantech SBC Watchdog Timer"
179 depends on WATCHDOG && X86
181 If you are configuring a Linux kernel for the Advantech single-board
182 computer, say `Y' here to support its built-in watchdog timer
183 feature. More information can be found at
184 <http://www.advantech.com.tw/products/>
187 tristate "ALi M1535 PMU Watchdog Timer"
188 depends on WATCHDOG && X86 && PCI
190 This is the driver for the hardware watchdog on the ALi M1535 PMU.
192 To compile this driver as a module, choose M here: the
193 module will be called alim1535_wdt.
195 Most people will say N.
198 tristate "ALi M7101 PMU Computer Watchdog"
199 depends on WATCHDOG && X86 && PCI
201 This is the driver for the hardware watchdog on the ALi M7101 PMU
202 as used in the x86 Cobalt servers.
204 To compile this driver as a module, choose M here: the
205 module will be called alim7101_wdt.
207 Most people will say N.
210 tristate "AMD Elan SC520 processor Watchdog"
211 depends on WATCHDOG && X86
213 This is the driver for the hardware watchdog built in to the
214 AMD "Elan" SC520 microcomputer commonly used in embedded systems.
215 This watchdog simply watches your kernel to make sure it doesn't
216 freeze, and if it does, it reboots your computer after a certain
219 You can compile this driver directly into the kernel, or use
220 it as a module. The module will be called sc520_wdt.
223 tristate "Eurotech CPU-1220/1410 Watchdog Timer"
224 depends on WATCHDOG && X86
226 Enable support for the watchdog timer on the Eurotech CPU-1220 and
227 CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
228 information are at <http://www.eurotech.it/>.
231 tristate "IB700 SBC Watchdog Timer"
232 depends on WATCHDOG && X86
234 This is the driver for the hardware watchdog on the IB700 Single
235 Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
236 simply watches your kernel to make sure it doesn't freeze, and if
237 it does, it reboots your computer after a certain amount of time.
239 This driver is like the WDT501 driver but for slightly different hardware.
241 To compile this driver as a module, choose M here: the
242 module will be called ib700wdt.
244 Most people will say N.
247 tristate "IBM Automatic Server Restart"
248 depends on WATCHDOG && X86
250 This is the driver for the IBM Automatic Server Restart watchdog
251 timer builtin into some eServer xSeries machines.
253 To compile this driver as a module, choose M here: the
254 module will be called ibmasr.
257 tristate "ICP Wafer 5823 Single Board Computer Watchdog"
258 depends on WATCHDOG && X86
260 This is a driver for the hardware watchdog on the ICP Wafer 5823
261 Single Board Computer (and probably other similar models).
263 To compile this driver as a module, choose M here: the
264 module will be called wafer5823wdt.
267 tristate "Intel 6300ESB Timer/Watchdog"
268 depends on WATCHDOG && X86 && PCI
270 Hardware driver for the watchdog timer built into the Intel
271 6300ESB controller hub.
273 To compile this driver as a module, choose M here: the
274 module will be called i6300esb.
277 tristate "Intel i8xx TCO Timer/Watchdog"
278 depends on WATCHDOG && (X86 || IA64) && PCI
280 Hardware driver for the TCO timer built into the Intel 82801
281 I/O Controller Hub family. The TCO (Total Cost of Ownership)
282 timer is a watchdog timer that will reboot the machine after
283 its second expiration. The expiration time can be configured
284 with the "heartbeat" parameter.
286 On some motherboards the driver may fail to reset the chipset's
287 NO_REBOOT flag which prevents the watchdog from rebooting the
288 machine. If this is the case you will get a kernel message like
289 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
291 To compile this driver as a module, choose M here: the
292 module will be called i8xx_tco.
295 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
296 depends on WATCHDOG && X86
298 This is a driver for National Semiconductor PC87307/PC97307 hardware
299 watchdog cards as found on the SC1200. This watchdog is mainly used
300 for power management purposes and can be used to power down the device
301 during inactivity periods (includes interrupt activity monitoring).
303 To compile this driver as a module, choose M here: the
304 module will be called sc1200wdt.
306 Most people will say N.
309 tristate "National Semiconductor SCx200 Watchdog"
310 depends on WATCHDOG && SCx200 && PCI
312 Enable the built-in watchdog timer support on the National
313 Semiconductor SCx200 processors.
315 If compiled as a module, it will be called scx200_wdt.
318 tristate "SBC-60XX Watchdog Timer"
319 depends on WATCHDOG && X86
321 This driver can be used with the watchdog timer found on some
322 single board computers, namely the 6010 PII based computer.
323 It may well work with other cards. It reads port 0x443 to enable
324 and re-set the watchdog timer, and reads port 0x45 to disable
325 the watchdog. If you have a card that behave in similar ways,
326 you can probably make this driver work with your card as well.
328 You can compile this driver directly into the kernel, or use
329 it as a module. The module will be called sbc60xxwdt.
332 tristate "SBC8360 Watchdog Timer"
333 depends on WATCHDOG && X86
336 This is the driver for the hardware watchdog on the SBC8360 Single
337 Board Computer produced by Axiomtek Co., Ltd. (www.axiomtek.com).
339 To compile this driver as a module, choose M here: the
340 module will be called sbc8360.ko.
342 Most people will say N.
345 tristate "SMA CPU5 Watchdog"
346 depends on WATCHDOG && X86
349 To compile this driver as a module, choose M here: the
350 module will be called cpu5wdt.
353 tristate "W83627HF Watchdog Timer"
354 depends on WATCHDOG && X86
356 This is the driver for the hardware watchdog on the W83627HF chipset
357 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
358 (and likely others). This watchdog simply watches your kernel to
359 make sure it doesn't freeze, and if it does, it reboots your computer
360 after a certain amount of time.
362 To compile this driver as a module, choose M here: the
363 module will be called w83627hf_wdt.
365 Most people will say N.
368 tristate "W83877F (EMACS) Watchdog Timer"
369 depends on WATCHDOG && X86
371 This is the driver for the hardware watchdog on the W83877F chipset
372 as used in EMACS PC-104 motherboards (and likely others). This
373 watchdog simply watches your kernel to make sure it doesn't freeze,
374 and if it does, it reboots your computer after a certain amount of
377 To compile this driver as a module, choose M here: the
378 module will be called w83877f_wdt.
380 Most people will say N.
383 tristate "W83977F (PCM-5335) Watchdog Timer"
384 depends on WATCHDOG && X86
386 This is the driver for the hardware watchdog on the W83977F I/O chip
387 as used in AAEON's PCM-5335 SBC (and likely others). This
388 watchdog simply watches your kernel to make sure it doesn't freeze,
389 and if it does, it reboots your computer after a certain amount of
392 To compile this driver as a module, choose M here: the
393 module will be called w83977f_wdt.
396 tristate "ZF MachZ Watchdog"
397 depends on WATCHDOG && X86
399 If you are using a ZF Micro MachZ processor, say Y here, otherwise
400 N. This is the driver for the watchdog timer builtin on that
401 processor using ZF-Logic interface. This watchdog simply watches
402 your kernel to make sure it doesn't freeze, and if it does, it
403 reboots your computer after a certain amount of time.
405 To compile this driver as a module, choose M here: the
406 module will be called machzwd.
408 config SBC_EPX_C3_WATCHDOG
409 tristate "Winsystems SBC EPX-C3 watchdog"
410 depends on WATCHDOG && X86
412 This is the driver for the built-in watchdog timer on the EPX-C3
413 Single-board computer made by Winsystems, Inc.
415 *Note*: This hardware watchdog is not probeable and thus there
416 is no way to know if writing to its IO address will corrupt
417 your system or have any real effect. The only way to be sure
418 that this driver does what you want is to make sure you
419 are runnning it on an EPX-C3 from Winsystems with the watchdog
420 timer at IO address 0x1ee and 0x1ef. It will write to both those
421 IO ports. Basically, the assumption is made that if you compile
422 this driver into your kernel and/or load it as a module, that you
423 know what you are doing and that you are in fact running on an
426 To compile this driver as a module, choose M here: the
427 module will be called sbc_epx_c3.
430 # PowerPC Architecture
433 tristate "MPC8xx Watchdog Timer"
434 depends on WATCHDOG && 8xx
437 tristate "MPC83xx Watchdog Timer"
438 depends on WATCHDOG && PPC_83xx
441 tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
442 depends on WATCHDOG && MV64X60
445 tristate "PowerPC Book-E Watchdog Timer"
446 depends on WATCHDOG && (BOOKE || 4xx)
448 Please see Documentation/watchdog/watchdog-api.txt for
454 tristate "RTAS watchdog"
455 depends on WATCHDOG && PPC_RTAS
457 This driver adds watchdog support for the RTAS watchdog.
459 To compile this driver as a module, choose M here. The module
460 will be called wdrtas.
465 tristate "Indy/I2 Hardware Watchdog"
466 depends on WATCHDOG && SGI_IP22
468 Hardwaredriver for the Indy's/I2's watchdog. This is a
469 watchdog timer that will reboot the machine after a 60 second
470 timer expired and no process has written to /dev/watchdog during
476 tristate "z/VM Watchdog Timer"
477 depends on WATCHDOG && S390
479 IBM s/390 and zSeries machines running under z/VM 5.1 or later
480 provide a virtual watchdog timer to their guest that cause a
481 user define Control Program command to be executed after a
484 To compile this driver as a module, choose M here. The module
485 will be called vmwatchdog.
487 # SUPERH Architecture
490 tristate "SuperH Watchdog"
491 depends on WATCHDOG && SUPERH
493 This driver adds watchdog support for the integrated watchdog in the
494 SuperH processors. If you have one of these processors and wish
495 to have watchdog support enabled, say Y, otherwise say N.
497 As a side note, saying Y here will automatically boost HZ to 1000
498 so that the timer has a chance to clear the overflow counter. On
499 slower systems (such as the SH-2 and SH-3) this will likely yield
500 some performance issues. As such, the WDT should be avoided here
501 unless it is absolutely necessary.
503 To compile this driver as a module, choose M here: the
504 module will be called shwdt.
506 # SPARC64 Architecture
508 config WATCHDOG_CP1XXX
509 tristate "CP1XXX Hardware Watchdog support"
510 depends on WATCHDOG && SPARC64 && PCI
512 This is the driver for the hardware watchdog timers present on
513 Sun Microsystems CompactPCI models CP1400 and CP1500.
515 To compile this driver as a module, choose M here: the
516 module will be called cpwatchdog.
518 If you do not have a CompactPCI model CP1400 or CP1500, or
519 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
520 you should say N to this option.
523 tristate "RIO Hardware Watchdog support"
524 depends on WATCHDOG && SPARC64 && PCI
526 Say Y here to support the hardware watchdog capability on Sun RIO
527 machines. The watchdog timeout period is normally one minute but
528 can be changed with a boot-time parameter.
531 # ISA-based Watchdog Cards
534 comment "ISA-based Watchdog Cards"
535 depends on WATCHDOG && ISA
538 tristate "Berkshire Products ISA-PC Watchdog"
539 depends on WATCHDOG && ISA
541 This is the driver for the Berkshire Products ISA-PC Watchdog card.
542 This card simply watches your kernel to make sure it doesn't freeze,
543 and if it does, it reboots your computer after a certain amount of
544 time. This driver is like the WDT501 driver but for different
545 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
546 watchdog cards can be ordered from <http://www.berkprod.com/>.
548 To compile this driver as a module, choose M here: the
549 module will be called pcwd.
551 Most people will say N.
554 tristate "Mixcom Watchdog"
555 depends on WATCHDOG && ISA
557 This is a driver for the Mixcom hardware watchdog cards. This
558 watchdog simply watches your kernel to make sure it doesn't freeze,
559 and if it does, it reboots your computer after a certain amount of
562 To compile this driver as a module, choose M here: the
563 module will be called mixcomwd.
565 Most people will say N.
568 tristate "WDT Watchdog timer"
569 depends on WATCHDOG && ISA
571 If you have a WDT500P or WDT501P watchdog board, say Y here,
572 otherwise N. It is not possible to probe for this board, which means
573 that you have to inform the kernel about the IO port and IRQ that
574 is needed (you can do this via the io and irq parameters)
576 To compile this driver as a module, choose M here: the
577 module will be called wdt.
580 bool "WDT501 features"
583 Saying Y here and creating a character special file /dev/temperature
584 with major number 10 and minor number 131 ("man mknod") will give
585 you a thermometer inside your computer: reading from
586 /dev/temperature yields one byte, the temperature in degrees
587 Fahrenheit. This works only if you have a WDT501P watchdog board
590 If you want to enable the Fan Tachometer on the WDT501P, then you
591 can do this via the tachometer parameter. Only do this if you have a
592 fan tachometer actually set up.
595 # PCI-based Watchdog Cards
598 comment "PCI-based Watchdog Cards"
599 depends on WATCHDOG && PCI
602 tristate "Berkshire Products PCI-PC Watchdog"
603 depends on WATCHDOG && PCI
605 This is the driver for the Berkshire Products PCI-PC Watchdog card.
606 This card simply watches your kernel to make sure it doesn't freeze,
607 and if it does, it reboots your computer after a certain amount of
608 time. The card can also monitor the internal temperature of the PC.
609 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
611 To compile this driver as a module, choose M here: the
612 module will be called pcwd_pci.
614 Most people will say N.
617 tristate "PCI-WDT500/501 Watchdog timer"
618 depends on WATCHDOG && PCI
620 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
622 To compile this driver as a module, choose M here: the
623 module will be called wdt_pci.
626 bool "PCI-WDT501 features"
629 Saying Y here and creating a character special file /dev/temperature
630 with major number 10 and minor number 131 ("man mknod") will give
631 you a thermometer inside your computer: reading from
632 /dev/temperature yields one byte, the temperature in degrees
633 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
636 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
637 can do this via the tachometer parameter. Only do this if you have a
638 fan tachometer actually set up.
641 # USB-based Watchdog Cards
644 comment "USB-based Watchdog Cards"
645 depends on WATCHDOG && USB
648 tristate "Berkshire Products USB-PC Watchdog"
649 depends on WATCHDOG && USB
651 This is the driver for the Berkshire Products USB-PC Watchdog card.
652 This card simply watches your kernel to make sure it doesn't freeze,
653 and if it does, it reboots your computer after a certain amount of
654 time. The card can also monitor the internal temperature of the PC.
655 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
657 To compile this driver as a module, choose M here: the
658 module will be called pcwd_usb.
660 Most people will say N.