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 IXP4XX_WATCHDOG
88 tristate "IXP4xx Watchdog"
89 depends on WATCHDOG && ARCH_IXP4XX
91 Say Y here if to include support for the watchdog timer
92 in the Intel IXP4xx network processors. This driver can
93 be built as a module by choosing M. The module will
96 Note: The internal IXP4xx watchdog does a soft CPU reset
97 which doesn't reset any peripherals. There are circumstances
98 where the watchdog will fail to reset the board correctly
99 (e.g., if the boot ROM is in an unreadable state).
101 Say N if you are unsure.
103 config IXP2000_WATCHDOG
104 tristate "IXP2000 Watchdog"
105 depends on WATCHDOG && ARCH_IXP2000
107 Say Y here if to include support for the watchdog timer
108 in the Intel IXP2000(2400, 2800, 2850) network processors.
109 This driver can be built as a module by choosing M. The module
110 will be called ixp2000_wdt.
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 "ICP Wafer 5823 Single Board Computer Watchdog"
238 depends on WATCHDOG && X86
240 This is a driver for the hardware watchdog on the ICP Wafer 5823
241 Single Board Computer (and probably other similar models).
243 To compile this driver as a module, choose M here: the
244 module will be called wafer5823wdt.
247 tristate "Intel i8xx TCO Timer/Watchdog"
248 depends on WATCHDOG && (X86 || IA64) && PCI
250 Hardware driver for the TCO timer built into the Intel 82801
251 I/O Controller Hub family. The TCO (Total Cost of Ownership)
252 timer is a watchdog timer that will reboot the machine after
253 its second expiration. The expiration time can be configured
254 with the "heartbeat" parameter.
256 On some motherboards the driver may fail to reset the chipset's
257 NO_REBOOT flag which prevents the watchdog from rebooting the
258 machine. If this is the case you will get a kernel message like
259 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
261 To compile this driver as a module, choose M here: the
262 module will be called i8xx_tco.
265 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
266 depends on WATCHDOG && X86
268 This is a driver for National Semiconductor PC87307/PC97307 hardware
269 watchdog cards as found on the SC1200. This watchdog is mainly used
270 for power management purposes and can be used to power down the device
271 during inactivity periods (includes interrupt activity monitoring).
273 To compile this driver as a module, choose M here: the
274 module will be called sc1200wdt.
276 Most people will say N.
279 tristate "National Semiconductor SCx200 Watchdog"
280 depends on WATCHDOG && SCx200 && PCI
282 Enable the built-in watchdog timer support on the National
283 Semiconductor SCx200 processors.
285 If compiled as a module, it will be called scx200_wdt.
288 tristate "SBC-60XX Watchdog Timer"
289 depends on WATCHDOG && X86
291 This driver can be used with the watchdog timer found on some
292 single board computers, namely the 6010 PII based computer.
293 It may well work with other cards. It reads port 0x443 to enable
294 and re-set the watchdog timer, and reads port 0x45 to disable
295 the watchdog. If you have a card that behave in similar ways,
296 you can probably make this driver work with your card as well.
298 You can compile this driver directly into the kernel, or use
299 it as a module. The module will be called sbc60xxwdt.
302 tristate "SMA CPU5 Watchdog"
303 depends on WATCHDOG && X86
306 To compile this driver as a module, choose M here: the
307 module will be called cpu5wdt.
310 tristate "W83627HF Watchdog Timer"
311 depends on WATCHDOG && X86
313 This is the driver for the hardware watchdog on the W83627HF chipset
314 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
315 (and likely others). This watchdog simply watches your kernel to
316 make sure it doesn't freeze, and if it does, it reboots your computer
317 after a certain amount of time.
319 To compile this driver as a module, choose M here: the
320 module will be called w83627hf_wdt.
322 Most people will say N.
325 tristate "W83877F (EMACS) Watchdog Timer"
326 depends on WATCHDOG && X86
328 This is the driver for the hardware watchdog on the W83877F chipset
329 as used in EMACS PC-104 motherboards (and likely others). This
330 watchdog simply watches your kernel to make sure it doesn't freeze,
331 and if it does, it reboots your computer after a certain amount of
334 To compile this driver as a module, choose M here: the
335 module will be called w83877f_wdt.
337 Most people will say N.
340 tristate "ZF MachZ Watchdog"
341 depends on WATCHDOG && X86
343 If you are using a ZF Micro MachZ processor, say Y here, otherwise
344 N. This is the driver for the watchdog timer builtin on that
345 processor using ZF-Logic interface. This watchdog simply watches
346 your kernel to make sure it doesn't freeze, and if it does, it
347 reboots your computer after a certain amount of time.
349 To compile this driver as a module, choose M here: the
350 module will be called machzwd.
352 # PowerPC Architecture
355 tristate "MPC8xx Watchdog Timer"
356 depends on WATCHDOG && 8xx
359 tristate "PowerPC Book-E Watchdog Timer"
360 depends on WATCHDOG && (BOOKE || 4xx)
362 Please see Documentation/watchdog/watchdog-api.txt for
368 tristate "Indy/I2 Hardware Watchdog"
369 depends on WATCHDOG && SGI_IP22
371 Hardwaredriver for the Indy's/I2's watchdog. This is a
372 watchdog timer that will reboot the machine after a 60 second
373 timer expired and no process has written to /dev/watchdog during
379 tristate "z/VM Watchdog Timer"
380 depends on WATCHDOG && ARCH_S390
382 IBM s/390 and zSeries machines running under z/VM 5.1 or later
383 provide a virtual watchdog timer to their guest that cause a
384 user define Control Program command to be executed after a
387 To compile this driver as a module, choose M here. The module
388 will be called vmwatchdog.
390 # SUPERH Architecture
393 tristate "SuperH Watchdog"
394 depends on WATCHDOG && SUPERH
396 This driver adds watchdog support for the integrated watchdog in the
397 SuperH processors. If you have one of these processors and wish
398 to have watchdog support enabled, say Y, otherwise say N.
400 As a side note, saying Y here will automatically boost HZ to 1000
401 so that the timer has a chance to clear the overflow counter. On
402 slower systems (such as the SH-2 and SH-3) this will likely yield
403 some performance issues. As such, the WDT should be avoided here
404 unless it is absolutely necessary.
406 To compile this driver as a module, choose M here: the
407 module will be called shwdt.
409 # SPARC64 Architecture
411 config WATCHDOG_CP1XXX
412 tristate "CP1XXX Hardware Watchdog support"
413 depends on WATCHDOG && SPARC64 && PCI
415 This is the driver for the hardware watchdog timers present on
416 Sun Microsystems CompactPCI models CP1400 and CP1500.
418 To compile this driver as a module, choose M here: the
419 module will be called cpwatchdog.
421 If you do not have a CompactPCI model CP1400 or CP1500, or
422 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
423 you should say N to this option.
426 tristate "RIO Hardware Watchdog support"
427 depends on WATCHDOG && SPARC64 && PCI
429 Say Y here to support the hardware watchdog capability on Sun RIO
430 machines. The watchdog timeout period is normally one minute but
431 can be changed with a boot-time parameter.
433 # ppc64 RTAS watchdog
435 tristate "RTAS watchdog"
436 depends on WATCHDOG && PPC_RTAS
438 This driver adds watchdog support for the RTAS watchdog.
440 To compile this driver as a module, choose M here. The module
441 will be called wdrtas.
444 # ISA-based Watchdog Cards
447 comment "ISA-based Watchdog Cards"
448 depends on WATCHDOG && ISA
451 tristate "Berkshire Products ISA-PC Watchdog"
452 depends on WATCHDOG && ISA
454 This is the driver for the Berkshire Products ISA-PC Watchdog card.
455 This card simply watches your kernel to make sure it doesn't freeze,
456 and if it does, it reboots your computer after a certain amount of
457 time. This driver is like the WDT501 driver but for different
458 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
459 watchdog cards can be ordered from <http://www.berkprod.com/>.
461 To compile this driver as a module, choose M here: the
462 module will be called pcwd.
464 Most people will say N.
467 tristate "Mixcom Watchdog"
468 depends on WATCHDOG && ISA
470 This is a driver for the Mixcom hardware watchdog cards. This
471 watchdog simply watches your kernel to make sure it doesn't freeze,
472 and if it does, it reboots your computer after a certain amount of
475 To compile this driver as a module, choose M here: the
476 module will be called mixcomwd.
478 Most people will say N.
481 tristate "WDT Watchdog timer"
482 depends on WATCHDOG && ISA
484 If you have a WDT500P or WDT501P watchdog board, say Y here,
485 otherwise N. It is not possible to probe for this board, which means
486 that you have to inform the kernel about the IO port and IRQ that
487 is needed (you can do this via the io and irq parameters)
489 To compile this driver as a module, choose M here: the
490 module will be called wdt.
493 bool "WDT501 features"
496 Saying Y here and creating a character special file /dev/temperature
497 with major number 10 and minor number 131 ("man mknod") will give
498 you a thermometer inside your computer: reading from
499 /dev/temperature yields one byte, the temperature in degrees
500 Fahrenheit. This works only if you have a WDT501P watchdog board
503 If you want to enable the Fan Tachometer on the WDT501P, then you
504 can do this via the tachometer parameter. Only do this if you have a
505 fan tachometer actually set up.
508 # PCI-based Watchdog Cards
511 comment "PCI-based Watchdog Cards"
512 depends on WATCHDOG && PCI
515 tristate "Berkshire Products PCI-PC Watchdog"
516 depends on WATCHDOG && PCI
518 This is the driver for the Berkshire Products PCI-PC Watchdog card.
519 This card simply watches your kernel to make sure it doesn't freeze,
520 and if it does, it reboots your computer after a certain amount of
521 time. The card can also monitor the internal temperature of the PC.
522 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
524 To compile this driver as a module, choose M here: the
525 module will be called pcwd_pci.
527 Most people will say N.
530 tristate "PCI-WDT500/501 Watchdog timer"
531 depends on WATCHDOG && PCI
533 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
535 To compile this driver as a module, choose M here: the
536 module will be called wdt_pci.
539 bool "PCI-WDT501 features"
542 Saying Y here and creating a character special file /dev/temperature
543 with major number 10 and minor number 131 ("man mknod") will give
544 you a thermometer inside your computer: reading from
545 /dev/temperature yields one byte, the temperature in degrees
546 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
549 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
550 can do this via the tachometer parameter. Only do this if you have a
551 fan tachometer actually set up.
554 # USB-based Watchdog Cards
557 comment "USB-based Watchdog Cards"
558 depends on WATCHDOG && USB
561 tristate "Berkshire Products USB-PC Watchdog"
562 depends on WATCHDOG && USB
564 This is the driver for the Berkshire Products USB-PC Watchdog card.
565 This card 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
567 time. The card can also monitor the internal temperature of the PC.
568 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
570 To compile this driver as a module, choose M here: the
571 module will be called pcwd_usb.
573 Most people will say N.