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 IXP2000_WATCHDOG
99 tristate "IXP2000 Watchdog"
100 depends on WATCHDOG && ARCH_IXP2000
102 Say Y here if to include support for the watchdog timer
103 in the Intel IXP2000(2400, 2800, 2850) network processors.
104 This driver can be built as a module by choosing M. The module
105 will be called ixp2000_wdt.
107 Say N if you are unsure.
109 config S3C2410_WATCHDOG
110 tristate "S3C2410 Watchdog"
111 depends on WATCHDOG && ARCH_S3C2410
113 Watchdog timer block in the Samsung S3C2410 chips. This will
114 reboot the system when the timer expires with the watchdog
117 The driver is limited by the speed of the system's PCLK
118 signal, so with reasonbaly fast systems (PCLK around 50-66MHz)
119 then watchdog intervals of over approximately 20seconds are
122 The driver can be built as a module by choosing M, and will
123 be called s3c2410_wdt
125 config SA1100_WATCHDOG
126 tristate "SA1100/PXA2xx watchdog"
127 depends on WATCHDOG && ( ARCH_SA1100 || ARCH_PXA )
129 Watchdog timer embedded into SA11x0 and PXA2xx chips. This will
130 reboot your system when timeout is reached.
132 NOTE: once enabled, this timer cannot be disabled.
134 To compile this driver as a module, choose M here: the
135 module will be called sa1100_wdt.
137 # X86 (i386 + ia64 + x86_64) Architecture
140 tristate "Acquire SBC Watchdog Timer"
141 depends on WATCHDOG && X86
143 This is the driver for the hardware watchdog on Single Board
144 Computers produced by Acquire Inc (and others). This watchdog
145 simply watches your kernel to make sure it doesn't freeze, and if
146 it does, it reboots your computer after a certain amount of time.
148 To compile this driver as a module, choose M here: the
149 module will be called acquirewdt.
151 Most people will say N.
154 tristate "Advantech SBC Watchdog Timer"
155 depends on WATCHDOG && X86
157 If you are configuring a Linux kernel for the Advantech single-board
158 computer, say `Y' here to support its built-in watchdog timer
159 feature. More information can be found at
160 <http://www.advantech.com.tw/products/>
163 tristate "ALi M1535 PMU Watchdog Timer"
164 depends on WATCHDOG && X86 && PCI
166 This is the driver for the hardware watchdog on the ALi M1535 PMU.
168 To compile this driver as a module, choose M here: the
169 module will be called alim1535_wdt.
171 Most people will say N.
174 tristate "ALi M7101 PMU Computer Watchdog"
175 depends on WATCHDOG && X86 && PCI
177 This is the driver for the hardware watchdog on the ALi M7101 PMU
178 as used in the x86 Cobalt servers.
180 To compile this driver as a module, choose M here: the
181 module will be called alim7101_wdt.
183 Most people will say N.
186 tristate "AMD Elan SC520 processor Watchdog"
187 depends on WATCHDOG && X86
189 This is the driver for the hardware watchdog built in to the
190 AMD "Elan" SC520 microcomputer commonly used in embedded systems.
191 This watchdog simply watches your kernel to make sure it doesn't
192 freeze, and if it does, it reboots your computer after a certain
195 You can compile this driver directly into the kernel, or use
196 it as a module. The module will be called sc520_wdt.
199 tristate "Eurotech CPU-1220/1410 Watchdog Timer"
200 depends on WATCHDOG && X86
202 Enable support for the watchdog timer on the Eurotech CPU-1220 and
203 CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product
204 information are at <http://www.eurotech.it/>.
207 tristate "IB700 SBC Watchdog Timer"
208 depends on WATCHDOG && X86
210 This is the driver for the hardware watchdog on the IB700 Single
211 Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog
212 simply watches your kernel to make sure it doesn't freeze, and if
213 it does, it reboots your computer after a certain amount of time.
215 This driver is like the WDT501 driver but for slightly different hardware.
217 To compile this driver as a module, choose M here: the
218 module will be called ib700wdt.
220 Most people will say N.
223 tristate "ICP Wafer 5823 Single Board Computer Watchdog"
224 depends on WATCHDOG && X86
226 This is a driver for the hardware watchdog on the ICP Wafer 5823
227 Single Board Computer (and probably other similar models).
229 To compile this driver as a module, choose M here: the
230 module will be called wafer5823wdt.
233 tristate "Intel i8xx TCO Timer/Watchdog"
234 depends on WATCHDOG && (X86 || IA64) && PCI
236 Hardware driver for the TCO timer built into the Intel 82801
237 I/O Controller Hub family. The TCO (Total Cost of Ownership)
238 timer is a watchdog timer that will reboot the machine after
239 its second expiration. The expiration time can be configured
240 with the "heartbeat" parameter.
242 On some motherboards the driver may fail to reset the chipset's
243 NO_REBOOT flag which prevents the watchdog from rebooting the
244 machine. If this is the case you will get a kernel message like
245 "failed to reset NO_REBOOT flag, reboot disabled by hardware".
247 To compile this driver as a module, choose M here: the
248 module will be called i8xx_tco.
251 tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog"
252 depends on WATCHDOG && X86
254 This is a driver for National Semiconductor PC87307/PC97307 hardware
255 watchdog cards as found on the SC1200. This watchdog is mainly used
256 for power management purposes and can be used to power down the device
257 during inactivity periods (includes interrupt activity monitoring).
259 To compile this driver as a module, choose M here: the
260 module will be called sc1200wdt.
262 Most people will say N.
265 tristate "National Semiconductor SCx200 Watchdog"
266 depends on WATCHDOG && X86 && PCI
268 Enable the built-in watchdog timer support on the National
269 Semiconductor SCx200 processors.
271 If compiled as a module, it will be called scx200_watchdog.
274 tristate "SBC-60XX Watchdog Timer"
275 depends on WATCHDOG && X86
277 This driver can be used with the watchdog timer found on some
278 single board computers, namely the 6010 PII based computer.
279 It may well work with other cards. It reads port 0x443 to enable
280 and re-set the watchdog timer, and reads port 0x45 to disable
281 the watchdog. If you have a card that behave in similar ways,
282 you can probably make this driver work with your card as well.
284 You can compile this driver directly into the kernel, or use
285 it as a module. The module will be called sbc60xxwdt.
288 tristate "SMA CPU5 Watchdog"
289 depends on WATCHDOG && X86
292 To compile this driver as a module, choose M here: the
293 module will be called cpu5wdt.
296 tristate "W83627HF Watchdog Timer"
297 depends on WATCHDOG && X86
299 This is the driver for the hardware watchdog on the W83627HF chipset
300 as used in Advantech PC-9578 and Tyan S2721-533 motherboards
301 (and likely others). This watchdog simply watches your kernel to
302 make sure it doesn't freeze, and if it does, it reboots your computer
303 after a certain amount of time.
305 To compile this driver as a module, choose M here: the
306 module will be called w83627hf_wdt.
308 Most people will say N.
311 tristate "W83877F (EMACS) Watchdog Timer"
312 depends on WATCHDOG && X86
314 This is the driver for the hardware watchdog on the W83877F chipset
315 as used in EMACS PC-104 motherboards (and likely others). This
316 watchdog simply watches your kernel to make sure it doesn't freeze,
317 and if it does, it reboots your computer after a certain amount of
320 To compile this driver as a module, choose M here: the
321 module will be called w83877f_wdt.
323 Most people will say N.
326 tristate "ZF MachZ Watchdog"
327 depends on WATCHDOG && X86
329 If you are using a ZF Micro MachZ processor, say Y here, otherwise
330 N. This is the driver for the watchdog timer builtin on that
331 processor using ZF-Logic interface. This watchdog simply watches
332 your kernel to make sure it doesn't freeze, and if it does, it
333 reboots your computer after a certain amount of time.
335 To compile this driver as a module, choose M here: the
336 module will be called machzwd.
338 # PowerPC Architecture
341 tristate "MPC8xx Watchdog Timer"
342 depends on WATCHDOG && 8xx
347 tristate "Indy/I2 Hardware Watchdog"
348 depends on WATCHDOG && SGI_IP22
350 Hardwaredriver for the Indy's/I2's watchdog. This is a
351 watchdog timer that will reboot the machine after a 60 second
352 timer expired and no process has written to /dev/watchdog during
358 tristate "z/VM Watchdog Timer"
359 depends on WATCHDOG && ARCH_S390
361 IBM s/390 and zSeries machines running under z/VM 5.1 or later
362 provide a virtual watchdog timer to their guest that cause a
363 user define Control Program command to be executed after a
366 To compile this driver as a module, choose M here. The module
367 will be called vmwatchdog.
369 # SUPERH Architecture
372 tristate "SuperH Watchdog"
373 depends on WATCHDOG && SUPERH
375 This driver adds watchdog support for the integrated watchdog in the
376 SuperH processors. If you have one of these processors and wish
377 to have watchdog support enabled, say Y, otherwise say N.
379 As a side note, saying Y here will automatically boost HZ to 1000
380 so that the timer has a chance to clear the overflow counter. On
381 slower systems (such as the SH-2 and SH-3) this will likely yield
382 some performance issues. As such, the WDT should be avoided here
383 unless it is absolutely necessary.
385 To compile this driver as a module, choose M here: the
386 module will be called shwdt.
388 # SPARC64 Architecture
390 config WATCHDOG_CP1XXX
391 tristate "CP1XXX Hardware Watchdog support"
392 depends on WATCHDOG && SPARC64 && PCI
394 This is the driver for the hardware watchdog timers present on
395 Sun Microsystems CompactPCI models CP1400 and CP1500.
397 To compile this driver as a module, choose M here: the
398 module will be called cpwatchdog.
400 If you do not have a CompactPCI model CP1400 or CP1500, or
401 another UltraSPARC-IIi-cEngine boardset with hardware watchdog,
402 you should say N to this option.
405 tristate "RIO Hardware Watchdog support"
406 depends on WATCHDOG && SPARC64 && PCI
408 Say Y here to support the hardware watchdog capability on Sun RIO
409 machines. The watchdog timeout period is normally one minute but
410 can be changed with a boot-time parameter.
413 # ISA-based Watchdog Cards
416 comment "ISA-based Watchdog Cards"
417 depends on WATCHDOG && ISA
420 tristate "Berkshire Products ISA-PC Watchdog"
421 depends on WATCHDOG && ISA
423 This is the driver for the Berkshire Products ISA-PC Watchdog card.
424 This card simply watches your kernel to make sure it doesn't freeze,
425 and if it does, it reboots your computer after a certain amount of
426 time. This driver is like the WDT501 driver but for different
427 hardware. Please read <file:Documentation/watchdog/pcwd-watchdog.txt>. The PC
428 watchdog cards can be ordered from <http://www.berkprod.com/>.
430 To compile this driver as a module, choose M here: the
431 module will be called pcwd.
433 Most people will say N.
436 tristate "Mixcom Watchdog"
437 depends on WATCHDOG && ISA
439 This is a driver for the Mixcom hardware watchdog cards. This
440 watchdog simply watches your kernel to make sure it doesn't freeze,
441 and if it does, it reboots your computer after a certain amount of
444 To compile this driver as a module, choose M here: the
445 module will be called mixcomwd.
447 Most people will say N.
450 tristate "WDT Watchdog timer"
451 depends on WATCHDOG && ISA
453 If you have a WDT500P or WDT501P watchdog board, say Y here,
454 otherwise N. It is not possible to probe for this board, which means
455 that you have to inform the kernel about the IO port and IRQ that
456 is needed (you can do this via the io and irq parameters)
458 To compile this driver as a module, choose M here: the
459 module will be called wdt.
462 bool "WDT501 features"
465 Saying Y here and creating a character special file /dev/temperature
466 with major number 10 and minor number 131 ("man mknod") will give
467 you a thermometer inside your computer: reading from
468 /dev/temperature yields one byte, the temperature in degrees
469 Fahrenheit. This works only if you have a WDT501P watchdog board
472 If you want to enable the Fan Tachometer on the WDT501P, then you
473 can do this via the tachometer parameter. Only do this if you have a
474 fan tachometer actually set up.
477 # PCI-based Watchdog Cards
480 comment "PCI-based Watchdog Cards"
481 depends on WATCHDOG && PCI
484 tristate "Berkshire Products PCI-PC Watchdog"
485 depends on WATCHDOG && PCI
487 This is the driver for the Berkshire Products PCI-PC Watchdog card.
488 This card simply watches your kernel to make sure it doesn't freeze,
489 and if it does, it reboots your computer after a certain amount of
490 time. The card can also monitor the internal temperature of the PC.
491 More info is available at <http://www.berkprod.com/pci_pc_watchdog.htm>.
493 To compile this driver as a module, choose M here: the
494 module will be called pcwd_pci.
496 Most people will say N.
499 tristate "PCI-WDT500/501 Watchdog timer"
500 depends on WATCHDOG && PCI
502 If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N.
504 To compile this driver as a module, choose M here: the
505 module will be called wdt_pci.
508 bool "PCI-WDT501 features"
511 Saying Y here and creating a character special file /dev/temperature
512 with major number 10 and minor number 131 ("man mknod") will give
513 you a thermometer inside your computer: reading from
514 /dev/temperature yields one byte, the temperature in degrees
515 Fahrenheit. This works only if you have a PCI-WDT501 watchdog board
518 If you want to enable the Fan Tachometer on the PCI-WDT501, then you
519 can do this via the tachometer parameter. Only do this if you have a
520 fan tachometer actually set up.
523 # USB-based Watchdog Cards
526 comment "USB-based Watchdog Cards"
527 depends on WATCHDOG && USB
530 tristate "Berkshire Products USB-PC Watchdog"
531 depends on WATCHDOG && USB
533 This is the driver for the Berkshire Products USB-PC Watchdog card.
534 This card simply watches your kernel to make sure it doesn't freeze,
535 and if it does, it reboots your computer after a certain amount of
536 time. The card can also monitor the internal temperature of the PC.
537 More info is available at <http://www.berkprod.com/usb_pc_watchdog.htm>.
539 To compile this driver as a module, choose M here: the
540 module will be called pcwd_usb.
542 Most people will say N.