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 Say N if you are unsure.
98 config SA1100_WATCHDOG
99 tristate "SA1100/PXA2xx watchdog"
100 depends on WATCHDOG && ( ARCH_SA1100 || ARCH_PXA )
102 Watchdog timer embedded into SA11x0 and PXA2xx chips. This will
103 reboot your system when timeout is reached.
105 NOTE: once enabled, this timer cannot be disabled.
107 To compile this driver as a module, choose M here: the
108 module will be called sa1100_wdt.
110 # X86 (i386 + ia64 + x86_64) Architecture
113 tristate "Acquire SBC Watchdog Timer"
114 depends on WATCHDOG && X86
116 This is the driver for the hardware watchdog on Single Board
117 Computers produced by Acquire Inc (and others). This watchdog
118 simply watches your kernel to make sure it doesn't freeze, and if
119 it does, it reboots your computer after a certain amount of time.
121 To compile this driver as a module, choose M here: the
122 module will be called acquirewdt.
124 Most people will say N.
127 tristate "Advantech SBC Watchdog Timer"
128 depends on WATCHDOG && X86
130 If you are configuring a Linux kernel for the Advantech single-board
131 computer, say `Y' here to support its built-in watchdog timer
132 feature. More information can be found at
133 <http://www.advantech.com.tw/products/>
136 tristate "ALi M1535 PMU Watchdog Timer"
137 depends on WATCHDOG && X86 && PCI
139 This is the driver for the hardware watchdog on the ALi M1535 PMU.
141 To compile this driver as a module, choose M here: the
142 module will be called alim1535_wdt.
144 Most people will say N.
147 tristate "ALi M7101 PMU Computer Watchdog"
148 depends on WATCHDOG && X86 && PCI
150 This is the driver for the hardware watchdog on the ALi M7101 PMU
151 as used in the x86 Cobalt servers.
153 To compile this driver as a module, choose M here: the
154 module will be called alim7101_wdt.
156 Most people will say N.
159 tristate "AMD Elan SC520 processor Watchdog"
160 depends on WATCHDOG && X86
162 This is the driver for the hardware watchdog built in to the
163 AMD "Elan" SC520 microcomputer commonly used in embedded systems.
164 This watchdog simply watches your kernel to make sure it doesn't
165 freeze, and if it does, it reboots your computer after a certain
168 You can compile this driver directly into the kernel, or use
169 it as a module. The module will be called sc520_wdt.
172 tristate "Eurotech CPU-1220/1410 Watchdog Timer"
173 depends on WATCHDOG && X86
175 Enable support for the watchdog timer on the Eurotech CPU-1220 and
176 CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
177 information are at <http://www.eurotech.it/>.
180 tristate "IB700 SBC Watchdog Timer"
181 depends on WATCHDOG && X86
183 This is the driver for the hardware watchdog on the IB700 Single
184 Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
185 simply watches your kernel to make sure it doesn't freeze, and if
186 it does, it reboots your computer after a certain amount of time.
188 This driver is like the WDT501 driver but for slightly different hardware.
190 To compile this driver as a module, choose M here: the
191 module will be called ib700wdt.
193 Most people will say N.
196 tristate "ICP Wafer 5823 Single Board Computer Watchdog"
197 depends on WATCHDOG && X86
199 This is a driver for the hardware watchdog on the ICP Wafer 5823
200 Single Board Computer (and probably other similar models).
202 To compile this driver as a module, choose M here: the
203 module will be called wafer5823wdt.
206 tristate "Intel i8xx TCO Timer/Watchdog"
207 depends on WATCHDOG && (X86 || IA64) && PCI
209 Hardware driver for the TCO timer built into the Intel 82801
210 I/O Controller Hub family. The TCO (Total Cost of Ownership)
211 timer is a watchdog timer that will reboot the machine after
212 its second expiration. The expiration time can be configured
213 with the "heartbeat" parameter.
215 On some motherboards the driver may fail to reset the chipset's
216 NO_REBOOT flag which prevents the watchdog from rebooting the
217 machine. If this is the case you will get a kernel message like
218 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
220 To compile this driver as a module, choose M here: the
221 module will be called i8xx_tco.
224 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
225 depends on WATCHDOG && X86
227 This is a driver for National Semiconductor PC87307/PC97307 hardware
228 watchdog cards as found on the SC1200. This watchdog is mainly used
229 for power management purposes and can be used to power down the device
230 during inactivity periods (includes interrupt activity monitoring).
232 To compile this driver as a module, choose M here: the
233 module will be called sc1200wdt.
235 Most people will say N.
238 tristate "National Semiconductor SCx200 Watchdog"
239 depends on WATCHDOG && X86 && PCI
241 Enable the built-in watchdog timer support on the National
242 Semiconductor SCx200 processors.
244 If compiled as a module, it will be called scx200_watchdog.
247 tristate "SBC-60XX Watchdog Timer"
248 depends on WATCHDOG && X86
250 This driver can be used with the watchdog timer found on some
251 single board computers, namely the 6010 PII based computer.
252 It may well work with other cards. It reads port 0x443 to enable
253 and re-set the watchdog timer, and reads port 0x45 to disable
254 the watchdog. If you have a card that behave in similar ways,
255 you can probably make this driver work with your card as well.
257 You can compile this driver directly into the kernel, or use
258 it as a module. The module will be called sbc60xxwdt.
261 tristate "SMA CPU5 Watchdog"
262 depends on WATCHDOG && X86
265 To compile this driver as a module, choose M here: the
266 module will be called cpu5wdt.
269 tristate "W83627HF Watchdog Timer"
270 depends on WATCHDOG && X86
272 This is the driver for the hardware watchdog on the W83627HF chipset
273 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
274 (and likely others). This watchdog simply watches your kernel to
275 make sure it doesn't freeze, and if it does, it reboots your computer
276 after a certain amount of time.
278 To compile this driver as a module, choose M here: the
279 module will be called w83627hf_wdt.
281 Most people will say N.
284 tristate "W83877F (EMACS) Watchdog Timer"
285 depends on WATCHDOG && X86
287 This is the driver for the hardware watchdog on the W83877F chipset
288 as used in EMACS PC-104 motherboards (and likely others). This
289 watchdog simply watches your kernel to make sure it doesn't freeze,
290 and if it does, it reboots your computer after a certain amount of
293 To compile this driver as a module, choose M here: the
294 module will be called w83877f_wdt.
296 Most people will say N.
299 tristate "ZF MachZ Watchdog"
300 depends on WATCHDOG && X86
302 If you are using a ZF Micro MachZ processor, say Y here, otherwise
303 N. This is the driver for the watchdog timer builtin on that
304 processor using ZF-Logic interface. This watchdog simply watches
305 your kernel to make sure it doesn't freeze, and if it does, it
306 reboots your computer after a certain amount of time.
308 To compile this driver as a module, choose M here: the
309 module will be called machzwd.
314 tristate "Indy/I2 Hardware Watchdog"
315 depends on WATCHDOG && SGI_IP22
317 Hardwaredriver for the Indy's/I2's watchdog. This is a
318 watchdog timer that will reboot the machine after a 60 second
319 timer expired and no process has written to /dev/watchdog during
322 # SUPERH Architecture
325 tristate "SuperH Watchdog"
326 depends on WATCHDOG && SUPERH
328 This driver adds watchdog support for the integrated watchdog in the
329 SuperH processors. If you have one of these processors and wish
330 to have watchdog support enabled, say Y, otherwise say N.
332 As a side note, saying Y here will automatically boost HZ to 1000
333 so that the timer has a chance to clear the overflow counter. On
334 slower systems (such as the SH-2 and SH-3) this will likely yield
335 some performance issues. As such, the WDT should be avoided here
336 unless it is absolutely necessary.
338 To compile this driver as a module, choose M here: the
339 module will be called shwdt.
341 # SPARC64 Architecture
343 config WATCHDOG_CP1XXX
344 tristate "CP1XXX Hardware Watchdog support"
345 depends on WATCHDOG && SPARC64 && PCI
347 This is the driver for the hardware watchdog timers present on
348 Sun Microsystems CompactPCI models CP1400 and CP1500.
350 To compile this driver as a module, choose M here: the
351 module will be called cpwatchdog.
353 If you do not have a CompactPCI model CP1400 or CP1500, or
354 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
355 you should say N to this option.
358 tristate "RIO Hardware Watchdog support"
359 depends on WATCHDOG && SPARC64 && PCI
361 Say Y here to support the hardware watchdog capability on Sun RIO
362 machines. The watchdog timeout period is normally one minute but
363 can be changed with a boot-time parameter.
366 # ISA-based Watchdog Cards
369 comment "ISA-based Watchdog Cards"
370 depends on WATCHDOG && ISA
373 tristate "Berkshire Products ISA-PC Watchdog"
374 depends on WATCHDOG && ISA
376 This is the driver for the Berkshire Products ISA-PC Watchdog card.
377 This card simply watches your kernel to make sure it doesn't freeze,
378 and if it does, it reboots your computer after a certain amount of
379 time. This driver is like the WDT501 driver but for different
380 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
381 watchdog cards can be ordered from <http://www.berkprod.com/>.
383 To compile this driver as a module, choose M here: the
384 module will be called pcwd.
386 Most people will say N.
389 tristate "Mixcom Watchdog"
390 depends on WATCHDOG && ISA
392 This is a driver for the Mixcom hardware watchdog cards. This
393 watchdog simply watches your kernel to make sure it doesn't freeze,
394 and if it does, it reboots your computer after a certain amount of
397 To compile this driver as a module, choose M here: the
398 module will be called mixcomwd.
400 Most people will say N.
403 tristate "WDT Watchdog timer"
404 depends on WATCHDOG && ISA
406 If you have a WDT500P or WDT501P watchdog board, say Y here,
407 otherwise N. It is not possible to probe for this board, which means
408 that you have to inform the kernel about the IO port and IRQ that
409 is needed (you can do this via the io and irq parameters)
411 To compile this driver as a module, choose M here: the
412 module will be called wdt.
415 bool "WDT501 features"
418 Saying Y here and creating a character special file /dev/temperature
419 with major number 10 and minor number 131 ("man mknod") will give
420 you a thermometer inside your computer: reading from
421 /dev/temperature yields one byte, the temperature in degrees
422 Fahrenheit. This works only if you have a WDT501P watchdog board
425 If you want to enable the Fan Tachometer on the WDT501P, then you
426 can do this via the tachometer parameter. Only do this if you have a
427 fan tachometer actually set up.
430 # PCI-based Watchdog Cards
433 comment "PCI-based Watchdog Cards"
434 depends on WATCHDOG && PCI
437 tristate "Berkshire Products PCI-PC Watchdog"
438 depends on WATCHDOG && PCI
440 This is the driver for the Berkshire Products PCI-PC Watchdog card.
441 This card simply watches your kernel to make sure it doesn't freeze,
442 and if it does, it reboots your computer after a certain amount of
443 time. The card can also monitor the internal temperature of the PC.
444 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
446 To compile this driver as a module, choose M here: the
447 module will be called pcwd_pci.
449 Most people will say N.
452 tristate "PCI-WDT500/501 Watchdog timer"
453 depends on WATCHDOG && PCI
455 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
457 To compile this driver as a module, choose M here: the
458 module will be called wdt_pci.
461 bool "PCI-WDT501 features"
464 Saying Y here and creating a character special file /dev/temperature
465 with major number 10 and minor number 131 ("man mknod") will give
466 you a thermometer inside your computer: reading from
467 /dev/temperature yields one byte, the temperature in degrees
468 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
471 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
472 can do this via the tachometer parameter. Only do this if you have a
473 fan tachometer actually set up.
476 # USB-based Watchdog Cards
479 comment "USB-based Watchdog Cards"
480 depends on WATCHDOG && USB
483 tristate "Berkshire Products USB-PC Watchdog"
484 depends on WATCHDOG && USB
486 This is the driver for the Berkshire Products USB-PC Watchdog card.
487 This card simply watches your kernel to make sure it doesn't freeze,
488 and if it does, it reboots your computer after a certain amount of
489 time. The card can also monitor the internal temperature of the PC.
490 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
492 To compile this driver as a module, choose M here: the
493 module will be called pcwd_usb.
495 Most people will say N.