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 # X86 (i386 + ia64 + x86_64) Architecture
145 tristate "Acquire SBC Watchdog Timer"
146 depends on WATCHDOG && X86
148 This is the driver for the hardware watchdog on Single Board
149 Computers produced by Acquire Inc (and others). This watchdog
150 simply watches your kernel to make sure it doesn't freeze, and if
151 it does, it reboots your computer after a certain amount of time.
153 To compile this driver as a module, choose M here: the
154 module will be called acquirewdt.
156 Most people will say N.
159 tristate "Advantech SBC Watchdog Timer"
160 depends on WATCHDOG && X86
162 If you are configuring a Linux kernel for the Advantech single-board
163 computer, say `Y' here to support its built-in watchdog timer
164 feature. More information can be found at
165 <http://www.advantech.com.tw/products/>
168 tristate "ALi M1535 PMU Watchdog Timer"
169 depends on WATCHDOG && X86 && PCI
171 This is the driver for the hardware watchdog on the ALi M1535 PMU.
173 To compile this driver as a module, choose M here: the
174 module will be called alim1535_wdt.
176 Most people will say N.
179 tristate "ALi M7101 PMU Computer Watchdog"
180 depends on WATCHDOG && X86 && PCI
182 This is the driver for the hardware watchdog on the ALi M7101 PMU
183 as used in the x86 Cobalt servers.
185 To compile this driver as a module, choose M here: the
186 module will be called alim7101_wdt.
188 Most people will say N.
191 tristate "AMD Elan SC520 processor Watchdog"
192 depends on WATCHDOG && X86
194 This is the driver for the hardware watchdog built in to the
195 AMD "Elan" SC520 microcomputer commonly used in embedded systems.
196 This watchdog simply watches your kernel to make sure it doesn't
197 freeze, and if it does, it reboots your computer after a certain
200 You can compile this driver directly into the kernel, or use
201 it as a module. The module will be called sc520_wdt.
204 tristate "Eurotech CPU-1220/1410 Watchdog Timer"
205 depends on WATCHDOG && X86
207 Enable support for the watchdog timer on the Eurotech CPU-1220 and
208 CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
209 information are at <http://www.eurotech.it/>.
212 tristate "IB700 SBC Watchdog Timer"
213 depends on WATCHDOG && X86
215 This is the driver for the hardware watchdog on the IB700 Single
216 Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
217 simply watches your kernel to make sure it doesn't freeze, and if
218 it does, it reboots your computer after a certain amount of time.
220 This driver is like the WDT501 driver but for slightly different hardware.
222 To compile this driver as a module, choose M here: the
223 module will be called ib700wdt.
225 Most people will say N.
228 tristate "ICP Wafer 5823 Single Board Computer Watchdog"
229 depends on WATCHDOG && X86
231 This is a driver for the hardware watchdog on the ICP Wafer 5823
232 Single Board Computer (and probably other similar models).
234 To compile this driver as a module, choose M here: the
235 module will be called wafer5823wdt.
238 tristate "Intel i8xx TCO Timer/Watchdog"
239 depends on WATCHDOG && (X86 || IA64) && PCI
241 Hardware driver for the TCO timer built into the Intel 82801
242 I/O Controller Hub family. The TCO (Total Cost of Ownership)
243 timer is a watchdog timer that will reboot the machine after
244 its second expiration. The expiration time can be configured
245 with the "heartbeat" parameter.
247 On some motherboards the driver may fail to reset the chipset's
248 NO_REBOOT flag which prevents the watchdog from rebooting the
249 machine. If this is the case you will get a kernel message like
250 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
252 To compile this driver as a module, choose M here: the
253 module will be called i8xx_tco.
256 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
257 depends on WATCHDOG && X86
259 This is a driver for National Semiconductor PC87307/PC97307 hardware
260 watchdog cards as found on the SC1200. This watchdog is mainly used
261 for power management purposes and can be used to power down the device
262 during inactivity periods (includes interrupt activity monitoring).
264 To compile this driver as a module, choose M here: the
265 module will be called sc1200wdt.
267 Most people will say N.
270 tristate "National Semiconductor SCx200 Watchdog"
271 depends on WATCHDOG && SCx200 && PCI
273 Enable the built-in watchdog timer support on the National
274 Semiconductor SCx200 processors.
276 If compiled as a module, it will be called scx200_wdt.
279 tristate "SBC-60XX Watchdog Timer"
280 depends on WATCHDOG && X86
282 This driver can be used with the watchdog timer found on some
283 single board computers, namely the 6010 PII based computer.
284 It may well work with other cards. It reads port 0x443 to enable
285 and re-set the watchdog timer, and reads port 0x45 to disable
286 the watchdog. If you have a card that behave in similar ways,
287 you can probably make this driver work with your card as well.
289 You can compile this driver directly into the kernel, or use
290 it as a module. The module will be called sbc60xxwdt.
293 tristate "SMA CPU5 Watchdog"
294 depends on WATCHDOG && X86
297 To compile this driver as a module, choose M here: the
298 module will be called cpu5wdt.
301 tristate "W83627HF Watchdog Timer"
302 depends on WATCHDOG && X86
304 This is the driver for the hardware watchdog on the W83627HF chipset
305 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
306 (and likely others). This watchdog simply watches your kernel to
307 make sure it doesn't freeze, and if it does, it reboots your computer
308 after a certain amount of time.
310 To compile this driver as a module, choose M here: the
311 module will be called w83627hf_wdt.
313 Most people will say N.
316 tristate "W83877F (EMACS) Watchdog Timer"
317 depends on WATCHDOG && X86
319 This is the driver for the hardware watchdog on the W83877F chipset
320 as used in EMACS PC-104 motherboards (and likely others). This
321 watchdog simply watches your kernel to make sure it doesn't freeze,
322 and if it does, it reboots your computer after a certain amount of
325 To compile this driver as a module, choose M here: the
326 module will be called w83877f_wdt.
328 Most people will say N.
331 tristate "ZF MachZ Watchdog"
332 depends on WATCHDOG && X86
334 If you are using a ZF Micro MachZ processor, say Y here, otherwise
335 N. This is the driver for the watchdog timer builtin on that
336 processor using ZF-Logic interface. This watchdog simply watches
337 your kernel to make sure it doesn't freeze, and if it does, it
338 reboots your computer after a certain amount of time.
340 To compile this driver as a module, choose M here: the
341 module will be called machzwd.
343 # PowerPC Architecture
346 tristate "MPC8xx Watchdog Timer"
347 depends on WATCHDOG && 8xx
350 tristate "MV64X60 (Marvell Discovery) Watchdog Timer"
351 depends on WATCHDOG && MV64X60
354 tristate "PowerPC Book-E Watchdog Timer"
355 depends on WATCHDOG && (BOOKE || 4xx)
357 Please see Documentation/watchdog/watchdog-api.txt for
363 tristate "RTAS watchdog"
364 depends on WATCHDOG && PPC_RTAS
366 This driver adds watchdog support for the RTAS watchdog.
368 To compile this driver as a module, choose M here. The module
369 will be called wdrtas.
374 tristate "Indy/I2 Hardware Watchdog"
375 depends on WATCHDOG && SGI_IP22
377 Hardwaredriver for the Indy's/I2's watchdog. This is a
378 watchdog timer that will reboot the machine after a 60 second
379 timer expired and no process has written to /dev/watchdog during
385 tristate "z/VM Watchdog Timer"
386 depends on WATCHDOG && ARCH_S390
388 IBM s/390 and zSeries machines running under z/VM 5.1 or later
389 provide a virtual watchdog timer to their guest that cause a
390 user define Control Program command to be executed after a
393 To compile this driver as a module, choose M here. The module
394 will be called vmwatchdog.
396 # SUPERH Architecture
399 tristate "SuperH Watchdog"
400 depends on WATCHDOG && SUPERH
402 This driver adds watchdog support for the integrated watchdog in the
403 SuperH processors. If you have one of these processors and wish
404 to have watchdog support enabled, say Y, otherwise say N.
406 As a side note, saying Y here will automatically boost HZ to 1000
407 so that the timer has a chance to clear the overflow counter. On
408 slower systems (such as the SH-2 and SH-3) this will likely yield
409 some performance issues. As such, the WDT should be avoided here
410 unless it is absolutely necessary.
412 To compile this driver as a module, choose M here: the
413 module will be called shwdt.
415 # SPARC64 Architecture
417 config WATCHDOG_CP1XXX
418 tristate "CP1XXX Hardware Watchdog support"
419 depends on WATCHDOG && SPARC64 && PCI
421 This is the driver for the hardware watchdog timers present on
422 Sun Microsystems CompactPCI models CP1400 and CP1500.
424 To compile this driver as a module, choose M here: the
425 module will be called cpwatchdog.
427 If you do not have a CompactPCI model CP1400 or CP1500, or
428 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
429 you should say N to this option.
432 tristate "RIO Hardware Watchdog support"
433 depends on WATCHDOG && SPARC64 && PCI
435 Say Y here to support the hardware watchdog capability on Sun RIO
436 machines. The watchdog timeout period is normally one minute but
437 can be changed with a boot-time parameter.
440 # ISA-based Watchdog Cards
443 comment "ISA-based Watchdog Cards"
444 depends on WATCHDOG && ISA
447 tristate "Berkshire Products ISA-PC Watchdog"
448 depends on WATCHDOG && ISA
450 This is the driver for the Berkshire Products ISA-PC Watchdog card.
451 This card simply watches your kernel to make sure it doesn't freeze,
452 and if it does, it reboots your computer after a certain amount of
453 time. This driver is like the WDT501 driver but for different
454 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
455 watchdog cards can be ordered from <http://www.berkprod.com/>.
457 To compile this driver as a module, choose M here: the
458 module will be called pcwd.
460 Most people will say N.
463 tristate "Mixcom Watchdog"
464 depends on WATCHDOG && ISA
466 This is a driver for the Mixcom hardware watchdog cards. This
467 watchdog simply watches your kernel to make sure it doesn't freeze,
468 and if it does, it reboots your computer after a certain amount of
471 To compile this driver as a module, choose M here: the
472 module will be called mixcomwd.
474 Most people will say N.
477 tristate "WDT Watchdog timer"
478 depends on WATCHDOG && ISA
480 If you have a WDT500P or WDT501P watchdog board, say Y here,
481 otherwise N. It is not possible to probe for this board, which means
482 that you have to inform the kernel about the IO port and IRQ that
483 is needed (you can do this via the io and irq parameters)
485 To compile this driver as a module, choose M here: the
486 module will be called wdt.
489 bool "WDT501 features"
492 Saying Y here and creating a character special file /dev/temperature
493 with major number 10 and minor number 131 ("man mknod") will give
494 you a thermometer inside your computer: reading from
495 /dev/temperature yields one byte, the temperature in degrees
496 Fahrenheit. This works only if you have a WDT501P watchdog board
499 If you want to enable the Fan Tachometer on the WDT501P, then you
500 can do this via the tachometer parameter. Only do this if you have a
501 fan tachometer actually set up.
504 # PCI-based Watchdog Cards
507 comment "PCI-based Watchdog Cards"
508 depends on WATCHDOG && PCI
511 tristate "Berkshire Products PCI-PC Watchdog"
512 depends on WATCHDOG && PCI
514 This is the driver for the Berkshire Products PCI-PC Watchdog card.
515 This card simply watches your kernel to make sure it doesn't freeze,
516 and if it does, it reboots your computer after a certain amount of
517 time. The card can also monitor the internal temperature of the PC.
518 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
520 To compile this driver as a module, choose M here: the
521 module will be called pcwd_pci.
523 Most people will say N.
526 tristate "PCI-WDT500/501 Watchdog timer"
527 depends on WATCHDOG && PCI
529 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
531 To compile this driver as a module, choose M here: the
532 module will be called wdt_pci.
535 bool "PCI-WDT501 features"
538 Saying Y here and creating a character special file /dev/temperature
539 with major number 10 and minor number 131 ("man mknod") will give
540 you a thermometer inside your computer: reading from
541 /dev/temperature yields one byte, the temperature in degrees
542 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
545 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
546 can do this via the tachometer parameter. Only do this if you have a
547 fan tachometer actually set up.
550 # USB-based Watchdog Cards
553 comment "USB-based Watchdog Cards"
554 depends on WATCHDOG && USB
557 tristate "Berkshire Products USB-PC Watchdog"
558 depends on WATCHDOG && USB
560 This is the driver for the Berkshire Products USB-PC Watchdog card.
561 This card simply watches your kernel to make sure it doesn't freeze,
562 and if it does, it reboots your computer after a certain amount of
563 time. The card can also monitor the internal temperature of the PC.
564 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
566 To compile this driver as a module, choose M here: the
567 module will be called pcwd_usb.
569 Most people will say N.