kconfig
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## Watchdog device configuration#menuconfig WATCHDOG bool "Watchdog Timer Support" ---help--- If you say Y here (and to one of the following options) and create a character special file /dev/watchdog with major number 10 and minor number 130 using mknod ("man mknod"), you will get a watchdog, i.e.: subsequently opening the file and then failing to write to it for longer than 1 minute will result in rebooting the machine. This could be useful for a networked machine that needs to come back on-line as fast as possible after a lock-up. There's both a watchdog implementation entirely in software (which can sometimes fail to reboot the machine) and a driver for hardware watchdog boards, which are more robust and can also keep track of the temperature inside your computer. For details, read <file:Documentation/watchdog/watchdog.txt> in the kernel source. The watchdog is usually used together with the watchdog daemon which is available from <ftp://ibiblio.org/pub/Linux/system/daemons/watchdog/>. This daemon can also monitor NFS connections and can reboot the machine when the process table is full. If unsure, say N.if WATCHDOGconfig WATCHDOG_NOWAYOUT bool "Disable watchdog shutdown on close" help The default watchdog behaviour (which you get if you say N here) is to stop the timer if the process managing it closes the file /dev/watchdog. It's always remotely possible that this process might get killed. If you say Y here, the watchdog cannot be stopped once it has been started.## General Watchdog drivers#comment "Watchdog Device Drivers"# Architecture Independentconfig SOFT_WATCHDOG tristate "Software watchdog" help A software monitoring watchdog. This will fail to reboot your system from some situations that the hardware watchdog will recover from. Equally it's a lot cheaper to install. To compile this driver as a module, choose M here: the module will be called softdog.# ARM Architectureconfig AT91RM9200_WATCHDOG tristate "AT91RM9200 watchdog" depends on ARCH_AT91RM9200 help Watchdog timer embedded into AT91RM9200 chips. This will reboot your system when the timeout is reached.config 21285_WATCHDOG tristate "DC21285 watchdog" depends on FOOTBRIDGE help The Intel Footbridge chip contains a built-in watchdog circuit. Say Y here if you wish to use this. Alternatively say M to compile the driver as a module, which will be called wdt285. This driver does not work on all machines. In particular, early CATS boards have hardware problems that will cause the machine to simply lock up if the watchdog fires. "If in doubt, leave it out" - say N.config 977_WATCHDOG tristate "NetWinder WB83C977 watchdog" depends on FOOTBRIDGE && ARCH_NETWINDER help Say Y here to include support for the WB977 watchdog included in NetWinder machines. Alternatively say M to compile the driver as a module, which will be called wdt977. Not sure? It's safe to say N.config IXP2000_WATCHDOG tristate "IXP2000 Watchdog" depends on ARCH_IXP2000 help Say Y here if to include support for the watchdog timer in the Intel IXP2000(2400, 2800, 2850) network processors. This driver can be built as a module by choosing M. The module will be called ixp2000_wdt. Say N if you are unsure.config IXP4XX_WATCHDOG tristate "IXP4xx Watchdog" depends on ARCH_IXP4XX help Say Y here if to include support for the watchdog timer in the Intel IXP4xx network processors. This driver can be built as a module by choosing M. The module will be called ixp4xx_wdt. Note: The internal IXP4xx watchdog does a soft CPU reset which doesn't reset any peripherals. There are circumstances where the watchdog will fail to reset the board correctly (e.g., if the boot ROM is in an unreadable state). Say N if you are unsure.config KS8695_WATCHDOG tristate "KS8695 watchdog" depends on ARCH_KS8695 help Watchdog timer embedded into KS8695 processor. This will reboot your system when the timeout is reached.config S3C2410_WATCHDOG tristate "S3C2410 Watchdog" depends on ARCH_S3C2410 help Watchdog timer block in the Samsung S3C2410 chips. This will reboot the system when the timer expires with the watchdog enabled. The driver is limited by the speed of the system's PCLK signal, so with reasonably fast systems (PCLK around 50-66MHz) then watchdog intervals of over approximately 20seconds are unavailable. The driver can be built as a module by choosing M, and will be called s3c2410_wdtconfig SA1100_WATCHDOG tristate "SA1100/PXA2xx watchdog" depends on ARCH_SA1100 || ARCH_PXA help Watchdog timer embedded into SA11x0 and PXA2xx chips. This will reboot your system when timeout is reached. NOTE: once enabled, this timer cannot be disabled. To compile this driver as a module, choose M here: the module will be called sa1100_wdt.config MPCORE_WATCHDOG tristate "MPcore watchdog" depends on ARM_MPCORE_PLATFORM && LOCAL_TIMERS help Watchdog timer embedded into the MPcore system. To compile this driver as a module, choose M here: the module will be called mpcore_wdt.config EP93XX_WATCHDOG tristate "EP93xx Watchdog" depends on ARCH_EP93XX help Say Y here if to include support for the watchdog timer embedded in the Cirrus Logic EP93xx family of devices. To compile this driver as a module, choose M here: the module will be called ep93xx_wdt.config OMAP_WATCHDOG tristate "OMAP Watchdog" depends on (ARCH_OMAP16XX || ARCH_OMAP24XX || ARCH_OMAP34XX) help Support for TI OMAP1610/OMAP1710/OMAP2420 watchdog. Say 'Y' here to enable the OMAP1610/OMAP1710 watchdog timer.config PNX4008_WATCHDOG tristate "PNX4008 Watchdog" depends on ARCH_PNX4008 help Say Y here if to include support for the watchdog timer in the PNX4008 processor. This driver can be built as a module by choosing M. The module will be called pnx4008_wdt. Say N if you are unsure.# X86 (i386 + ia64 + x86_64) Architectureconfig ACQUIRE_WDT tristate "Acquire SBC Watchdog Timer" depends on X86 ---help--- This is the driver for the hardware watchdog on Single Board Computers produced by Acquire Inc (and others). This watchdog simply watches your kernel to make sure it doesn't freeze, and if it does, it reboots your computer after a certain amount of time. To compile this driver as a module, choose M here: the module will be called acquirewdt. Most people will say N.config ADVANTECH_WDT tristate "Advantech SBC Watchdog Timer" depends on X86 help If you are configuring a Linux kernel for the Advantech single-board computer, say `Y' here to support its built-in watchdog timer feature. More information can be found at <http://www.advantech.com.tw/products/>config ALIM1535_WDT tristate "ALi M1535 PMU Watchdog Timer" depends on X86 && PCI ---help--- This is the driver for the hardware watchdog on the ALi M1535 PMU. To compile this driver as a module, choose M here: the module will be called alim1535_wdt. Most people will say N.config ALIM7101_WDT tristate "ALi M7101 PMU Computer Watchdog" depends on X86 && PCI help This is the driver for the hardware watchdog on the ALi M7101 PMU as used in the x86 Cobalt servers. To compile this driver as a module, choose M here: the module will be called alim7101_wdt. Most people will say N.config SC520_WDT tristate "AMD Elan SC520 processor Watchdog" depends on X86 help This is the driver for the hardware watchdog built in to the AMD "Elan" SC520 microcomputer commonly used in embedded systems. This watchdog simply watches your kernel to make sure it doesn't freeze, and if it does, it reboots your computer after a certain amount of time. You can compile this driver directly into the kernel, or use it as a module. The module will be called sc520_wdt.config EUROTECH_WDT tristate "Eurotech CPU-1220/1410 Watchdog Timer" depends on X86 help Enable support for the watchdog timer on the Eurotech CPU-1220 and CPU-1410 cards. These are PC/104 SBCs. Spec sheets and product information are at <http://www.eurotech.it/>.config IB700_WDT tristate "IB700 SBC Watchdog Timer" depends on X86 ---help--- This is the driver for the hardware watchdog on the IB700 Single Board Computer produced by TMC Technology (www.tmc-uk.com). This watchdog simply watches your kernel to make sure it doesn't freeze, and if it does, it reboots your computer after a certain amount of time. This driver is like the WDT501 driver but for slightly different hardware. To compile this driver as a module, choose M here: the module will be called ib700wdt. Most people will say N.config IBMASR tristate "IBM Automatic Server Restart" depends on X86 help This is the driver for the IBM Automatic Server Restart watchdog timer built-in into some eServer xSeries machines. To compile this driver as a module, choose M here: the module will be called ibmasr.config WAFER_WDT tristate "ICP Wafer 5823 Single Board Computer Watchdog" depends on X86 help This is a driver for the hardware watchdog on the ICP Wafer 5823 Single Board Computer (and probably other similar models). To compile this driver as a module, choose M here: the module will be called wafer5823wdt.config I6300ESB_WDT tristate "Intel 6300ESB Timer/Watchdog" depends on X86 && PCI ---help--- Hardware driver for the watchdog timer built into the Intel 6300ESB controller hub. To compile this driver as a module, choose M here: the module will be called i6300esb.config ITCO_WDT tristate "Intel TCO Timer/Watchdog" depends on (X86 || IA64) && PCI ---help--- Hardware driver for the intel TCO timer based watchdog devices. These drivers are included in the Intel 82801 I/O Controller Hub family (from ICH0 up to ICH8) and in the Intel 6300ESB controller hub. The TCO (Total Cost of Ownership) timer is a watchdog timer that will reboot the machine after its second expiration. The expiration time can be configured with the "heartbeat" parameter. On some motherboards the driver may fail to reset the chipset's NO_REBOOT flag which prevents the watchdog from rebooting the machine. If this is the case you will get a kernel message like "failed to reset NO_REBOOT flag, reboot disabled by hardware". To compile this driver as a module, choose M here: the module will be called iTCO_wdt.config ITCO_VENDOR_SUPPORT bool "Intel TCO Timer/Watchdog Specific Vendor Support" depends on ITCO_WDT ---help--- Add vendor specific support to the intel TCO timer based watchdog devices. At this moment we only have additional support for some SuperMicro Inc. motherboards.config SC1200_WDT tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog" depends on X86 help This is a driver for National Semiconductor PC87307/PC97307 hardware watchdog cards as found on the SC1200. This watchdog is mainly used for power management purposes and can be used to power down the device during inactivity periods (includes interrupt activity monitoring). To compile this driver as a module, choose M here: the module will be called sc1200wdt. Most people will say N.config SCx200_WDT tristate "National Semiconductor SCx200 Watchdog" depends on SCx200 && PCI help Enable the built-in watchdog timer support on the National Semiconductor SCx200 processors. If compiled as a module, it will be called scx200_wdt.config PC87413_WDT tristate "NS PC87413 watchdog" depends on X86 ---help--- This is the driver for the hardware watchdog on the PC87413 chipset This watchdog simply watches your kernel to make sure it doesn't freeze, and if it does, it reboots your computer after a certain amount of time. To compile this driver as a module, choose M here: the module will be called pc87413_wdt. Most people will say N. config 60XX_WDT tristate "SBC-60XX Watchdog Timer" depends on X86 help This driver can be used with the watchdog timer found on some single board computers, namely the 6010 PII based computer. It may well work with other cards. It reads port 0x443 to enable and re-set the watchdog timer, and reads port 0x45 to disable the watchdog. If you have a card that behave in similar ways, you can probably make this driver work with your card as well. You can compile this driver directly into the kernel, or use it as a module. The module will be called sbc60xxwdt.config SBC8360_WDT tristate "SBC8360 Watchdog Timer" depends on X86 ---help---
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