# SPDX-License-Identifier: GPL-2.0-only # # 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 in the kernel source. The watchdog is usually used together with the watchdog daemon which is available from . This daemon can also monitor NFS connections and can reboot the machine when the process table is full. If unsure, say N. if WATCHDOG config WATCHDOG_CORE tristate "WatchDog Timer Driver Core" help Say Y here if you want to use the new watchdog timer driver core. This driver provides a framework for all watchdog timer drivers and gives them the /dev/watchdog interface (and later also the sysfs interface). config 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. config WATCHDOG_HANDLE_BOOT_ENABLED bool "Update boot-enabled watchdog until userspace takes over" default y help The default watchdog behaviour (which you get if you say Y here) is to ping watchdog devices that were enabled before the driver has been loaded until control is taken over from userspace using the /dev/watchdog file. If you say N here, the kernel will not update the watchdog on its own. Thus if your userspace does not start fast enough your device will reboot. config WATCHDOG_OPEN_TIMEOUT int "Timeout value for opening watchdog device" default 0 help The maximum time, in seconds, for which the watchdog framework takes care of pinging a hardware watchdog. A value of 0 means infinite. The value set here can be overridden by the commandline parameter "watchdog.open_timeout". config WATCHDOG_SYSFS bool "Read different watchdog information through sysfs" help Say Y here if you want to enable watchdog device status read through sysfs attributes. config WATCHDOG_HRTIMER_PRETIMEOUT bool "Enable watchdog hrtimer-based pretimeouts" help Enable this if you want to use a hrtimer timer based pretimeout for watchdogs that do not natively support pretimeout support. Be aware that because this pretimeout functionality uses hrtimers, it may not be able to fire before the actual watchdog fires in some situations. comment "Watchdog Pretimeout Governors" config WATCHDOG_PRETIMEOUT_GOV bool "Enable watchdog pretimeout governors" depends on WATCHDOG_CORE help The option allows to select watchdog pretimeout governors. config WATCHDOG_PRETIMEOUT_GOV_SEL tristate depends on WATCHDOG_PRETIMEOUT_GOV default m select WATCHDOG_PRETIMEOUT_GOV_PANIC if WATCHDOG_PRETIMEOUT_GOV_NOOP=n if WATCHDOG_PRETIMEOUT_GOV config WATCHDOG_PRETIMEOUT_GOV_NOOP tristate "Noop watchdog pretimeout governor" depends on WATCHDOG_CORE default WATCHDOG_CORE help Noop watchdog pretimeout governor, only an informational message is added to kernel log buffer. config WATCHDOG_PRETIMEOUT_GOV_PANIC tristate "Panic watchdog pretimeout governor" depends on WATCHDOG_CORE default WATCHDOG_CORE help Panic watchdog pretimeout governor, on watchdog pretimeout event put the kernel into panic. choice prompt "Default Watchdog Pretimeout Governor" default WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC help This option selects a default watchdog pretimeout governor. The governor takes its action, if a watchdog is capable to report a pretimeout event. config WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP bool "noop" depends on WATCHDOG_PRETIMEOUT_GOV_NOOP help Use noop watchdog pretimeout governor by default. If noop governor is selected by a user, write a short message to the kernel log buffer and don't do any system changes. config WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC bool "panic" depends on WATCHDOG_PRETIMEOUT_GOV_PANIC help Use panic watchdog pretimeout governor by default, if a watchdog pretimeout event happens, consider that a watchdog feeder is dead and reboot is unavoidable. endchoice endif # WATCHDOG_PRETIMEOUT_GOV # # General Watchdog drivers # comment "Watchdog Device Drivers" # Architecture Independent config SOFT_WATCHDOG tristate "Software watchdog" select WATCHDOG_CORE 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. config SOFT_WATCHDOG_PRETIMEOUT bool "Software watchdog pretimeout governor support" depends on SOFT_WATCHDOG && WATCHDOG_PRETIMEOUT_GOV help Enable this if you want to use pretimeout governors with the software watchdog. Be aware that governors might affect the watchdog because it is purely software, e.g. the panic governor will stall it! config BD957XMUF_WATCHDOG tristate "ROHM BD9576MUF and BD9573MUF PMIC Watchdog" depends on MFD_ROHM_BD957XMUF select WATCHDOG_CORE help Support for the watchdog in the ROHM BD9576 and BD9573 PMICs. These PMIC ICs contain watchdog block which can be configured to toggle reset line if SoC fails to ping watchdog via GPIO. Say Y here to include support for the ROHM BD9576 or BD9573 watchdog. Alternatively say M to compile the driver as a module, which will be called bd9576_wdt. config BD96801_WATCHDOG tristate "ROHM BD96801 PMIC Watchdog" depends on MFD_ROHM_BD96801 select WATCHDOG_CORE help Support for the watchdog in the ROHM BD96801 PMIC. Watchdog can be configured to only generate IRQ or to trigger system reset via reset pin. Say Y here to include support for the ROHM BD96801 watchdog. Alternatively say M to compile the driver as a module, which will be called bd96801_wdt. config CROS_EC_WATCHDOG tristate "ChromeOS EC-based watchdog" select WATCHDOG_CORE depends on CROS_EC help Watchdog driver for Chromebook devices equipped with embedded controller. Trigger event is recorded in EC and checked on the subsequent boot. To compile this driver as a module, choose M here: the module will be called cros_ec_wdt. config DA9052_WATCHDOG tristate "Dialog DA9052 Watchdog" depends on PMIC_DA9052 || COMPILE_TEST select WATCHDOG_CORE help Support for the watchdog in the DA9052 PMIC. Watchdog trigger cause system reset. Say Y here to include support for the DA9052 watchdog. Alternatively say M to compile the driver as a module, which will be called da9052_wdt. config DA9055_WATCHDOG tristate "Dialog Semiconductor DA9055 Watchdog" depends on MFD_DA9055 || COMPILE_TEST select WATCHDOG_CORE help If you say yes here you get support for watchdog on the Dialog Semiconductor DA9055 PMIC. This driver can also be built as a module. If so, the module will be called da9055_wdt. config DA9063_WATCHDOG tristate "Dialog DA9063 Watchdog" depends on MFD_DA9063 || COMPILE_TEST depends on I2C select WATCHDOG_CORE help Support for the watchdog in the DA9063 PMIC. This driver can be built as a module. The module name is da9063_wdt. config DA9062_WATCHDOG tristate "Dialog DA9062/61 Watchdog" depends on MFD_DA9062 || COMPILE_TEST depends on I2C select WATCHDOG_CORE help Support for the watchdog in the DA9062 and DA9061 PMICs. This driver can be built as a module. The module name is da9062_wdt. config GPIO_WATCHDOG tristate "Watchdog device controlled through GPIO-line" depends on OF_GPIO select WATCHDOG_CORE help If you say yes here you get support for watchdog device controlled through GPIO-line. config GPIO_WATCHDOG_ARCH_INITCALL bool "Register the watchdog as early as possible" depends on GPIO_WATCHDOG=y help In some situations, the default initcall level (module_init) in not early enough in the boot process to avoid the watchdog to be triggered. If you say yes here, the initcall level would be raised to arch_initcall. If in doubt, say N. config LENOVO_SE10_WDT tristate "Lenovo SE10 Watchdog" depends on (X86 && DMI) || COMPILE_TEST depends on HAS_IOPORT select WATCHDOG_CORE help If you say yes here you get support for the watchdog functionality for the Lenovo SE10 platform. This driver can also be built as a module. If so, the module will be called lenovo-se10-wdt. config MENF21BMC_WATCHDOG tristate "MEN 14F021P00 BMC Watchdog" depends on MFD_MENF21BMC || COMPILE_TEST depends on I2C select WATCHDOG_CORE help Say Y here to include support for the MEN 14F021P00 BMC Watchdog. This driver can also be built as a module. If so the module will be called menf21bmc_wdt. config MENZ069_WATCHDOG tristate "MEN 16Z069 Watchdog" depends on MCB select WATCHDOG_CORE help Say Y here to include support for the MEN 16Z069 Watchdog. This driver can also be built as a module. If so the module will be called menz069_wdt. config WDAT_WDT tristate "ACPI Watchdog Action Table (WDAT)" depends on ACPI select WATCHDOG_CORE select ACPI_WATCHDOG help This driver adds support for systems with ACPI Watchdog Action Table (WDAT) table. Servers typically have this but it can be found on some desktop machines as well. This driver will take over the native iTCO watchdog driver found on many Intel CPUs. To compile this driver as module, choose M here: the module will be called wdat_wdt. config WM831X_WATCHDOG tristate "WM831x watchdog" depends on MFD_WM831X select WATCHDOG_CORE help Support for the watchdog in the WM831x AudioPlus PMICs. When the watchdog triggers the system will be reset. config WM8350_WATCHDOG tristate "WM8350 watchdog" depends on MFD_WM8350 select WATCHDOG_CORE help Support for the watchdog in the WM8350 AudioPlus PMIC. When the watchdog triggers the system will be reset. config XILINX_WATCHDOG tristate "Xilinx Watchdog timer" depends on HAS_IOMEM select WATCHDOG_CORE help Watchdog driver for the xps_timebase_wdt IP core. To compile this driver as a module, choose M here: the module will be called of_xilinx_wdt. config XILINX_WINDOW_WATCHDOG tristate "Xilinx window watchdog timer" depends on HAS_IOMEM depends on ARM64 || COMPILE_TEST select WATCHDOG_CORE help Window watchdog driver for the versal_wwdt IP core. Window watchdog timer(WWDT) contains closed(first) and open(second) window with 32 bit width. Write to the watchdog timer within predefined window periods of time. This means a period that is not too soon and a period that is not too late. The WWDT has to be restarted within the open window time. If software tries to restart WWDT outside of the open window time period, it generates a reset. To compile this driver as a module, choose M here: the module will be called xilinx_wwdt. config ZIIRAVE_WATCHDOG tristate "Zodiac RAVE Watchdog Timer" depends on I2C select WATCHDOG_CORE help Watchdog driver for the Zodiac Aerospace RAVE Switch Watchdog Processor. To compile this driver as a module, choose M here: the module will be called ziirave_wdt. config RAVE_SP_WATCHDOG tristate "RAVE SP Watchdog timer" depends on RAVE_SP_CORE depends on NVMEM || !NVMEM select WATCHDOG_CORE help Support for the watchdog on RAVE SP device. config MLX_WDT tristate "Mellanox Watchdog" depends on MELLANOX_PLATFORM || COMPILE_TEST select WATCHDOG_CORE select REGMAP help This is the driver for the hardware watchdog on Mellanox systems. If you are going to use it, say Y here, otherwise N. This driver can be used together with the watchdog daemon. It can also watch your kernel to make sure it doesn't freeze, and if it does, it reboots your system after a certain amount of time. To compile this driver as a module, choose M here: the module will be called mlx-wdt. config SL28CPLD_WATCHDOG tristate "Kontron sl28cpld Watchdog" depends on MFD_SL28CPLD || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer on the Kontron sl28 CPLD. To compile this driver as a module, choose M here: the module will be called sl28cpld_wdt. # ALPHA Architecture # ARM Architecture config AIROHA_WATCHDOG tristate "Airoha EN7581 Watchdog" depends on ARCH_AIROHA || COMPILE_TEST select WATCHDOG_CORE help Watchdog timer embedded into Airoha SoC. This will reboot your system when the timeout is reached. config ARM_SP805_WATCHDOG tristate "ARM SP805 Watchdog" depends on (ARM || ARM64 || COMPILE_TEST) && ARM_AMBA select WATCHDOG_CORE help ARM Primecell SP805 Watchdog timer. This will reboot your system when the timeout is reached. config ARM_SBSA_WATCHDOG tristate "ARM SBSA Generic Watchdog" depends on ARM64 depends on ARM_ARCH_TIMER select WATCHDOG_CORE help ARM SBSA Generic Watchdog has two stage timeouts: the first signal (WS0) is for alerting the system by interrupt, the second one (WS1) is a real hardware reset. More details: ARM DEN0029B - Server Base System Architecture (SBSA) This driver can operate ARM SBSA Generic Watchdog as a single stage or a two stages watchdog, it depends on the module parameter "action". Note: the maximum timeout in the two stages mode is half of that in the single stage mode. To compile this driver as module, choose M here: The module will be called sbsa_gwdt. config ARMADA_37XX_WATCHDOG tristate "Armada 37xx watchdog" depends on ARCH_MVEBU || COMPILE_TEST depends on HAS_IOMEM select MFD_SYSCON select WATCHDOG_CORE help Say Y here to include support for the watchdog timer found on Marvell Armada 37xx SoCs. To compile this driver as a module, choose M here: the module will be called armada_37xx_wdt. config ASM9260_WATCHDOG tristate "Alphascale ASM9260 watchdog" depends on MACH_ASM9260 || COMPILE_TEST depends on OF select WATCHDOG_CORE select RESET_CONTROLLER help Watchdog timer embedded into Alphascale asm9260 chips. This will reboot your system when the timeout is reached. config AT91RM9200_WATCHDOG tristate "AT91RM9200 watchdog" depends on (SOC_AT91RM9200 && MFD_SYSCON) || COMPILE_TEST help Watchdog timer embedded into AT91RM9200 chips. This will reboot your system when the timeout is reached. config AT91SAM9X_WATCHDOG tristate "AT91SAM9X / AT91CAP9 watchdog" depends on ARCH_AT91 || COMPILE_TEST select WATCHDOG_CORE help Watchdog timer embedded into AT91SAM9X and AT91CAP9 chips. This will reboot your system when the timeout is reached. config SAMA5D4_WATCHDOG tristate "Atmel SAMA5D4 Watchdog Timer" depends on ARCH_AT91 || COMPILE_TEST select WATCHDOG_CORE help Atmel SAMA5D4 watchdog timer is embedded into SAMA5D4 chips. Its Watchdog Timer Mode Register can be written more than once. This will reboot your system when the timeout is reached. config CADENCE_WATCHDOG tristate "Cadence Watchdog Timer" depends on HAS_IOMEM select WATCHDOG_CORE help Say Y here if you want to include support for the watchdog timer in the Xilinx Zynq. 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) || (ARM && COMPILE_TEST) depends on HAS_IOPORT 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 FTWDT010_WATCHDOG tristate "Faraday Technology FTWDT010 watchdog" depends on ARM || COMPILE_TEST select WATCHDOG_CORE default ARCH_GEMINI help Say Y here if to include support for the Faraday Technology FTWDT010 watchdog timer embedded in the Cortina Systems Gemini family of devices. To compile this driver as a module, choose M here: the module will be called ftwdt010_wdt. config IXP4XX_WATCHDOG tristate "IXP4xx Watchdog" depends on ARCH_IXP4XX || (ARM && COMPILE_TEST) select WATCHDOG_CORE 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 S3C2410_WATCHDOG tristate "S3C6410/S5Pv210/Exynos Watchdog" depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST select WATCHDOG_CORE select MFD_SYSCON if ARCH_EXYNOS help Watchdog timer block in the Samsung S3C64xx, S5Pv210 and Exynos SoCs. 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. Choose Y/M here only if you build for such Samsung SoC. The driver can be built as a module by choosing M, and will be called s3c2410_wdt. config SA1100_WATCHDOG tristate "SA1100/PXA2xx watchdog" depends on ARCH_SA1100 || ARCH_PXA || COMPILE_TEST 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 DW_WATCHDOG tristate "Synopsys DesignWare watchdog" depends on HAS_IOMEM select WATCHDOG_CORE help Say Y here if to include support for the Synopsys DesignWare watchdog timer found in many chips. To compile this driver as a module, choose M here: the module will be called dw_wdt. config EP93XX_WATCHDOG tristate "EP93xx Watchdog" depends on ARCH_EP93XX || COMPILE_TEST select WATCHDOG_CORE 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_OMAP2PLUS || COMPILE_TEST select WATCHDOG_CORE help Support for TI OMAP1610/OMAP1710/OMAP2420/OMAP3430/OMAP4430 watchdog. Say 'Y' here to enable the OMAP1610/OMAP1710/OMAP2420/OMAP3430/OMAP4430 watchdog timer. config PNX4008_WATCHDOG tristate "LPC32XX Watchdog" depends on ARCH_LPC32XX || COMPILE_TEST select WATCHDOG_CORE help Say Y here if to include support for the watchdog timer in the LPC32XX 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. config DAVINCI_WATCHDOG tristate "DaVinci watchdog" depends on ARCH_DAVINCI || ARCH_KEYSTONE || COMPILE_TEST select WATCHDOG_CORE help Say Y here if to include support for the watchdog timer in the DaVinci DM644x/DM646x or Keystone processors. To compile this driver as a module, choose M here: the module will be called davinci_wdt. NOTE: once enabled, this timer cannot be disabled. Say N if you are unsure. config K3_RTI_WATCHDOG tristate "Texas Instruments K3 RTI watchdog" depends on ARCH_K3 || COMPILE_TEST select WATCHDOG_CORE help Say Y here if you want to include support for the K3 watchdog timer (RTI module) available in the K3 generation of processors. config ORION_WATCHDOG tristate "Orion watchdog" depends on ARCH_ORION5X || ARCH_DOVE || MACH_DOVE || ARCH_MVEBU || COMPILE_TEST depends on ARM select WATCHDOG_CORE help Say Y here if to include support for the watchdog timer in the Marvell Orion5x and Kirkwood ARM SoCs. To compile this driver as a module, choose M here: the module will be called orion_wdt. config RN5T618_WATCHDOG tristate "Ricoh RN5T618 watchdog" depends on MFD_RN5T618 || COMPILE_TEST select WATCHDOG_CORE help If you say yes here you get support for watchdog on the Ricoh RN5T618 PMIC. This driver can also be built as a module. If so, the module will be called rn5t618_wdt. config SUNXI_WATCHDOG tristate "Allwinner SoCs watchdog support" depends on ARCH_SUNXI || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer in Allwinner SoCs. To compile this driver as a module, choose M here: the module will be called sunxi_wdt. config NPCM7XX_WATCHDOG tristate "Nuvoton NPCM750 watchdog" depends on ARCH_NPCM || COMPILE_TEST default y if ARCH_NPCM7XX select WATCHDOG_CORE help Say Y here to include Watchdog timer support for the watchdog embedded into the NPCM7xx. This watchdog is used to reset the system and thus cannot be compiled as a module. config TWL4030_WATCHDOG tristate "TWL4030 Watchdog" depends on TWL4030_CORE select WATCHDOG_CORE help Support for TI TWL4030 watchdog. Say 'Y' here to enable the watchdog timer support for TWL4030 chips. config STMP3XXX_RTC_WATCHDOG tristate "Freescale STMP3XXX & i.MX23/28 watchdog" depends on RTC_DRV_STMP || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer inside the RTC for the STMP37XX/378X or i.MX23/28 SoC. To compile this driver as a module, choose M here: the module will be called stmp3xxx_rtc_wdt. config TS4800_WATCHDOG tristate "TS-4800 Watchdog" depends on HAS_IOMEM && OF depends on SOC_IMX51 || COMPILE_TEST select WATCHDOG_CORE select MFD_SYSCON help Technologic Systems TS-4800 has watchdog timer implemented in an external FPGA. Say Y here if you want to support for the watchdog timer on TS-4800 board. config TS72XX_WATCHDOG tristate "TS-72XX SBC Watchdog" depends on MACH_TS72XX || COMPILE_TEST select WATCHDOG_CORE help Technologic Systems TS-7200, TS-7250 and TS-7260 boards have watchdog timer implemented in a external CPLD chip. Say Y here if you want to support for the watchdog timer on TS-72XX boards. To compile this driver as a module, choose M here: the module will be called ts72xx_wdt. config MAX63XX_WATCHDOG tristate "Max63xx watchdog" depends on HAS_IOMEM select WATCHDOG_CORE help Support for memory mapped max63{69,70,71,72,73,74} watchdog timer. config MAX77620_WATCHDOG tristate "Maxim Max77620 Watchdog Timer" depends on MFD_MAX77620 || MFD_MAX77714 || COMPILE_TEST select WATCHDOG_CORE help This is the driver for the Max77620 watchdog timer. Say 'Y' here to enable the watchdog timer support for MAX77620 chips. To compile this driver as a module, choose M here: the module will be called max77620_wdt. config IMX2_WDT tristate "IMX2+ Watchdog" depends on ARCH_MXC || ARCH_LAYERSCAPE || COMPILE_TEST select REGMAP_MMIO select WATCHDOG_CORE help This is the driver for the hardware watchdog on the Freescale IMX2 and later processors. If you have one of these processors and wish to have watchdog support enabled, say Y, otherwise say N. To compile this driver as a module, choose M here: the module will be called imx2_wdt. config IMX_SC_WDT tristate "IMX SC Watchdog" depends on HAVE_ARM_SMCCC depends on IMX_SCU || COMPILE_TEST select WATCHDOG_CORE help This is the driver for the system controller watchdog on the NXP i.MX SoCs with system controller inside, the watchdog driver will call ARM SMC API and trap into ARM-Trusted-Firmware for operations, ARM-Trusted-Firmware will request system controller to execute the operations. If you have one of these processors and wish to have watchdog support enabled, say Y, otherwise say N. To compile this driver as a module, choose M here: the module will be called imx_sc_wdt. config IMX7ULP_WDT tristate "IMX7ULP Watchdog" depends on ARCH_MXC || COMPILE_TEST select WATCHDOG_CORE help This is the driver for the hardware watchdog on the Freescale IMX7ULP and later processors. If you have one of these processors and wish to have watchdog support enabled, say Y, otherwise say N. To compile this driver as a module, choose M here: the module will be called imx7ulp_wdt. config DB500_WATCHDOG tristate "ST-Ericsson DB800 watchdog" depends on MFD_DB8500_PRCMU select WATCHDOG_CORE default y help Say Y here to include Watchdog timer support for the watchdog existing in the prcmu of ST-Ericsson DB8500 platform. To compile this driver as a module, choose M here: the module will be called db500_wdt. config RETU_WATCHDOG tristate "Retu watchdog" depends on MFD_RETU select WATCHDOG_CORE help Retu watchdog driver for Nokia Internet Tablets (770, N800, N810). At least on N800 the watchdog cannot be disabled, so this driver is essential and you should enable it. To compile this driver as a module, choose M here: the module will be called retu_wdt. config MOXART_WDT tristate "MOXART watchdog" depends on ARCH_MOXART || COMPILE_TEST help Say Y here to include Watchdog timer support for the watchdog existing on the MOXA ART SoC series platforms. To compile this driver as a module, choose M here: the module will be called moxart_wdt. config ST_LPC_WATCHDOG tristate "STMicroelectronics LPC Watchdog" depends on ARCH_STI || COMPILE_TEST depends on OF select WATCHDOG_CORE help Say Y here to include STMicroelectronics Low Power Controller (LPC) based Watchdog timer support. To compile this driver as a module, choose M here: the module will be called st_lpc_wdt. config TEGRA_WATCHDOG tristate "Tegra watchdog" depends on (ARCH_TEGRA || COMPILE_TEST) && HAS_IOMEM select WATCHDOG_CORE help Say Y here to include support for the watchdog timer embedded in NVIDIA Tegra SoCs. To compile this driver as a module, choose M here: the module will be called tegra_wdt. config QCOM_WDT tristate "QCOM watchdog" depends on HAS_IOMEM depends on ARCH_QCOM || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include Watchdog timer support for the watchdog found on QCOM chipsets. Currently supported targets are the MSM8960, APQ8064, and IPQ8064. To compile this driver as a module, choose M here: the module will be called qcom_wdt. config MESON_GXBB_WATCHDOG tristate "Amlogic Meson GXBB SoCs watchdog support" depends on ARCH_MESON || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer in Amlogic Meson GXBB SoCs. To compile this driver as a module, choose M here: the module will be called meson_gxbb_wdt. config MESON_WATCHDOG tristate "Amlogic Meson SoCs watchdog support" depends on ARCH_MESON || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer in Amlogic Meson SoCs. To compile this driver as a module, choose M here: the module will be called meson_wdt. config MEDIATEK_WATCHDOG tristate "Mediatek SoCs watchdog support" depends on ARCH_MEDIATEK || COMPILE_TEST default ARCH_MEDIATEK select WATCHDOG_CORE select RESET_CONTROLLER help Say Y here to include support for the watchdog timer in Mediatek SoCs. To compile this driver as a module, choose M here: the module will be called mtk_wdt. config DIGICOLOR_WATCHDOG tristate "Conexant Digicolor SoCs watchdog support" depends on ARCH_DIGICOLOR || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer in Conexant Digicolor SoCs. To compile this driver as a module, choose M here: the module will be called digicolor_wdt. config ARM_SMC_WATCHDOG tristate "ARM Secure Monitor Call based watchdog support" depends on ARM || ARM64 depends on OF depends on HAVE_ARM_SMCCC select WATCHDOG_CORE help Say Y here to include support for a watchdog timer implemented by the EL3 Secure Monitor on ARM platforms. Requires firmware support. To compile this driver as a module, choose M here: the module will be called arm_smc_wdt. config LPC18XX_WATCHDOG tristate "LPC18xx/43xx Watchdog" depends on ARCH_LPC18XX || COMPILE_TEST depends on HAS_IOMEM select WATCHDOG_CORE help Say Y here if to include support for the watchdog timer in NXP LPC SoCs family, which includes LPC18xx/LPC43xx processors. To compile this driver as a module, choose M here: the module will be called lpc18xx_wdt. config RENESAS_WDT tristate "Renesas WDT Watchdog" depends on ARCH_RENESAS || COMPILE_TEST select WATCHDOG_CORE help This driver adds watchdog support for the integrated watchdogs in the Renesas R-Car and other SH-Mobile SoCs (usually named RWDT or SWDT). config RENESAS_RZAWDT tristate "Renesas RZ/A WDT Watchdog" depends on ARCH_RENESAS || COMPILE_TEST select WATCHDOG_CORE help This driver adds watchdog support for the integrated watchdogs in the Renesas RZ/A SoCs. These watchdogs can be used to reset a system. config RENESAS_RZN1WDT tristate "Renesas RZ/N1 watchdog" depends on ARCH_RENESAS || COMPILE_TEST select WATCHDOG_CORE help This driver adds watchdog support for the integrated watchdogs in the Renesas RZ/N1 SoCs. These watchdogs can be used to reset a system. config RENESAS_RZG2LWDT tristate "Renesas RZ/G2L WDT Watchdog" depends on ARCH_RZG2L || ARCH_R9A09G011 || COMPILE_TEST depends on PM || COMPILE_TEST select WATCHDOG_CORE help This driver adds watchdog support for the integrated watchdogs in the Renesas RZ/G2L SoCs. These watchdogs can be used to reset a system. config RENESAS_RZV2HWDT tristate "Renesas RZ/V2H(P) WDT Watchdog" depends on ARCH_R9A09G057 || COMPILE_TEST depends on PM || COMPILE_TEST select WATCHDOG_CORE help This driver adds watchdog support for the integrated watchdogs in the Renesas RZ/V2H(P) SoCs. These watchdogs can be used to reset a system. config ASPEED_WATCHDOG tristate "Aspeed BMC watchdog support" depends on ARCH_ASPEED || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer in Aspeed BMC SoCs. This driver is required to reboot the SoC. To compile this driver as a module, choose M here: the module will be called aspeed_wdt. config STM32_WATCHDOG tristate "STM32 Independent WatchDoG (IWDG) support" depends on ARCH_STM32 || COMPILE_TEST select WATCHDOG_CORE default y help Say Y here to include support for the watchdog timer in stm32 SoCs. To compile this driver as a module, choose M here: the module will be called stm32_iwdg. config STPMIC1_WATCHDOG tristate "STPMIC1 PMIC watchdog support" depends on MFD_STPMIC1 select WATCHDOG_CORE help Say Y here to include watchdog support embedded into STPMIC1 PMIC. If the watchdog timer expires, stpmic1 will shut down all its power supplies. To compile this driver as a module, choose M here: the module will be called spmic1_wdt. config UNIPHIER_WATCHDOG tristate "UniPhier watchdog support" depends on ARCH_UNIPHIER || COMPILE_TEST depends on OF && MFD_SYSCON select WATCHDOG_CORE help Say Y here to include support watchdog timer embedded into the UniPhier system. To compile this driver as a module, choose M here: the module will be called uniphier_wdt. config RTD119X_WATCHDOG bool "Realtek RTD119x/RTD129x watchdog support" depends on ARCH_REALTEK || COMPILE_TEST depends on OF select WATCHDOG_CORE default ARCH_REALTEK help Say Y here to include support for the watchdog timer in Realtek RTD1295 SoCs. config REALTEK_OTTO_WDT tristate "Realtek Otto MIPS watchdog support" depends on MACH_REALTEK_RTL || COMPILE_TEST depends on COMMON_CLK select WATCHDOG_CORE default MACH_REALTEK_RTL help Say Y here to include support for the watchdog timer on Realtek RTL838x, RTL839x, RTL930x SoCs. This watchdog has pretimeout notifications and system reset on timeout. When built as a module this will be called realtek_otto_wdt. config SPRD_WATCHDOG tristate "Spreadtrum watchdog support" depends on ARCH_SPRD || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include watchdog timer supported by Spreadtrum system. config PM8916_WATCHDOG tristate "QCOM PM8916 pmic watchdog" depends on OF && MFD_SPMI_PMIC select WATCHDOG_CORE help Say Y here to include support watchdog timer embedded into the pm8916 module. config VISCONTI_WATCHDOG tristate "Toshiba Visconti series watchdog support" depends on ARCH_VISCONTI || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer in Toshiba Visconti SoCs. config MSC313E_WATCHDOG tristate "MStar MSC313e watchdog" depends on ARCH_MSTARV7 || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the Watchdog timer embedded into MStar MSC313e chips. This will reboot your system when the timeout is reached. To compile this driver as a module, choose M here: the module will be called msc313e_wdt. config APPLE_WATCHDOG tristate "Apple SoC watchdog" depends on ARCH_APPLE || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the Watchdog found in Apple SoCs such as the M1. Next to the common watchdog features this driver is also required in order to reboot these SoCs. To compile this driver as a module, choose M here: the module will be called apple_wdt. config SUNPLUS_WATCHDOG tristate "Sunplus watchdog support" depends on ARCH_SUNPLUS || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer in Sunplus SoCs. To compile this driver as a module, choose M here: the module will be called sunplus_wdt. # X86 (i386 + ia64 + x86_64) Architecture config 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 || COMPILE_TEST) && HAS_IOPORT 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 config ADVANTECH_EC_WDT tristate "Advantech Embedded Controller Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT select ISA_BUS_API select WATCHDOG_CORE help This driver supports Advantech products with ITE based Embedded Controller. It does not support Advantech products with other ECs or without EC. config ALIM1535_WDT tristate "ALi M1535 PMU Watchdog Timer" depends on (X86 || COMPILE_TEST) && 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 PCI help This is the driver for the hardware watchdog on the ALi M7101 PMU as used in the x86 Cobalt servers and also found in some SPARC Netra servers too. To compile this driver as a module, choose M here: the module will be called alim7101_wdt. Most people will say N. config CGBC_WDT tristate "Congatec Board Controller Watchdog Timer" depends on MFD_CGBC select WATCHDOG_CORE help Enables watchdog timer support for the Congatec Board Controller. This driver can also be built as a module. If so, the module will be called cgbc_wdt. config EBC_C384_WDT tristate "WinSystems EBC-C384 Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT select ISA_BUS_API select WATCHDOG_CORE help Enables watchdog timer support for the watchdog timer on the WinSystems EBC-C384 motherboard. The timeout may be configured via the timeout module parameter. config EXAR_WDT tristate "Exar Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT select WATCHDOG_CORE help Enables watchdog timer support for the watchdog timer present in some Exar/MaxLinear UART chips like the XR28V38x. To compile this driver as a module, choose M here: the module will be called exar_wdt. config F71808E_WDT tristate "Fintek F718xx, F818xx Super I/O Watchdog" depends on (X86 || COMPILE_TEST) && HAS_IOPORT select WATCHDOG_CORE help This is the driver for the hardware watchdog on the Fintek F71808E, F71862FG, F71868, F71869, F71882FG, F71889FG, F81803, F81865, and F81866 Super I/O controllers. You can compile this driver directly into the kernel, or use it as a module. The module will be called f71808e_wdt. config SP5100_TCO tristate "AMD/ATI SP5100 TCO Timer/Watchdog" depends on (X86 || COMPILE_TEST) && PCI && HAS_IOPORT select WATCHDOG_CORE help Hardware watchdog driver for the AMD/ATI SP5100 chipset. The TCO (Total Cost of Ownership) timer is a watchdog timer that will reboot the machine after its expiration. The expiration time can be configured with the "heartbeat" parameter. To compile this driver as a module, choose M here: the module will be called sp5100_tco. config GEODE_WDT tristate "AMD Geode CS5535/CS5536 Watchdog" depends on CS5535_MFGPT help This driver enables a watchdog capability built into the CS5535/CS5536 companion chips for the AMD Geode GX and LX processors. This watchdog 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 geodewdt. config SC520_WDT tristate "AMD Elan SC520 processor Watchdog" depends on MELAN || COMPILE_TEST 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 SBC_FITPC2_WATCHDOG tristate "Compulab SBC-FITPC2 watchdog" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help This is the driver for the built-in watchdog timer on the fit-PC2, fit-PC2i, CM-iAM single-board computers made by Compulab. It's possible to enable the watchdog timer either from BIOS (F2) or from booted Linux. When the "Watchdog Timer Value" is enabled one can set 31-255 seconds operational range. Entering BIOS setup temporarily disables watchdog operation regardless of current state, so system will not be restarted while user is in BIOS setup. Once the watchdog is enabled the system will be restarted every "Watchdog Timer Value" period, so to prevent it user can restart or disable the watchdog. To compile this driver as a module, choose M here: the module will be called sbc_fitpc2_wdt. Most people will say N. config EUROTECH_WDT tristate "Eurotech CPU-1220/1410 Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT 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 . config IB700_WDT tristate "IB700 SBC Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT 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 || COMPILE_TEST) && HAS_IOPORT 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 Single Board Computer Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help This is a driver for the hardware watchdog on the ICP Single Board Computer. This driver is working on (at least) the following IPC SBC's: Wafer 5823, Rocky 4783, Rocky 3703 and Rocky 3782. 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 PCI select WATCHDOG_CORE 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 IE6XX_WDT tristate "Intel Atom E6xx Watchdog" depends on (X86 || COMPILE_TEST) && PCI && HAS_IOPORT select WATCHDOG_CORE select MFD_CORE select LPC_SCH help Hardware driver for the watchdog timer built into the Intel Atom E6XX (TunnelCreek) processor. To compile this driver as a module, choose M here: the module will be called ie6xx_wdt. config INTEL_MID_WATCHDOG tristate "Intel MID Watchdog Timer" depends on X86_INTEL_MID select WATCHDOG_CORE help Watchdog timer driver built into the Intel SCU for Intel MID Platforms. This driver currently supports only the watchdog evolution implementation in SCU, available for Merrifield generation. To compile this driver as a module, choose M here. config ITCO_WDT tristate "Intel TCO Timer/Watchdog" depends on X86 && PCI select WATCHDOG_CORE depends on I2C || I2C=n depends on MFD_INTEL_PMC_BXT || !MFD_INTEL_PMC_BXT depends on HAS_IOPORT # for I2C_I801 select LPC_ICH if !EXPERT select I2C_I801 if !EXPERT && I2C 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 ICH10) and in the Intel 63xxESB 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 IT8712F_WDT tristate "IT8712F (Smart Guardian) Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help This is the driver for the built-in watchdog timer on the IT8712F Super I/0 chipset used on many motherboards. If the driver does not work, then make sure that the game port in the BIOS is enabled. To compile this driver as a module, choose M here: the module will be called it8712f_wdt. config IT87_WDT tristate "IT87 Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT select WATCHDOG_CORE help This is the driver for the hardware watchdog on the ITE IT8607, IT8620, IT8622, IT8625, IT8628, IT8655, IT8665, IT8686, IT8702, IT8712, IT8716, IT8718, IT8720, IT8721, IT8726, IT8728, and IT8783 Super I/O chips. 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 it87_wdt. config HP_WATCHDOG tristate "HP ProLiant iLO2+ Hardware Watchdog Timer" select WATCHDOG_CORE depends on (ARM64 || X86 || COMPILE_TEST) && PCI help A software monitoring watchdog and NMI handling driver. This driver will detect lockups and provide a stack trace. This is a driver that will only load on an HP ProLiant system with a minimum of iLO2 support. To compile this driver as a module, choose M here: the module will be called hpwdt. config HPWDT_NMI_DECODING bool "NMI support for the HP ProLiant iLO2+ Hardware Watchdog Timer" depends on X86 && HP_WATCHDOG default y help Enables the NMI handler for the watchdog pretimeout NMI and the iLO "Generate NMI to System" virtual button. When an NMI is claimed by the driver, panic is called. config KEMPLD_WDT tristate "Kontron COM Watchdog Timer" depends on MFD_KEMPLD select WATCHDOG_CORE help Support for the PLD watchdog on some Kontron ETX and COMexpress (ETXexpress) modules This driver can also be built as a module. If so, the module will be called kempld_wdt. config SC1200_WDT tristate "National Semiconductor PC87307/PC97307 (ala SC1200) Watchdog" depends on (X86 || COMPILE_TEST) && HAS_IOPORT 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 || COMPILE_TEST) && HAS_IOPORT 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 NV_TCO tristate "nVidia TCO Timer/Watchdog" depends on (X86 || COMPILE_TEST) && PCI && HAS_IOPORT help Hardware driver for the TCO timer built into the nVidia Hub family (such as the MCP51). 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 nv_tco. config RDC321X_WDT tristate "RDC R-321x SoC watchdog" depends on X86_RDC321X || COMPILE_TEST depends on PCI help This is the driver for the built in hardware watchdog in the RDC R-321x SoC. To compile this driver as a module, choose M here: the module will be called rdc321x_wdt. config 60XX_WDT tristate "SBC-60XX Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT 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_32 && HAS_IOPORT help This is the driver for the hardware watchdog on the SBC8360 Single Board Computer produced by Axiomtek Co., Ltd. (www.axiomtek.com). To compile this driver as a module, choose M here: the module will be called sbc8360. Most people will say N. config SBC7240_WDT tristate "SBC Nano 7240 Watchdog Timer" depends on X86_32 && HAS_IOPORT help This is the driver for the hardware watchdog found on the IEI single board computers EPIC Nano 7240 (and likely 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 sbc7240_wdt. config SMSC_SCH311X_WDT tristate "SMSC SCH311X Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help This is the driver for the hardware watchdog timer on the SMSC SCH3112, SCH3114 and SCH3116 Super IO chipset (LPC IO with 8042 KBC, Reset Generation, HWM and multiple serial ports). To compile this driver as a module, choose M here: the module will be called sch311x_wdt. config SMSC37B787_WDT tristate "Winbond SMsC37B787 Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help This is the driver for the hardware watchdog component on the Winbond SMsC37B787 chipset as used on the NetRunner Mainboard from Vision Systems and maybe 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. Usually a userspace daemon will notify the kernel WDT driver that userspace is still alive, at regular intervals. To compile this driver as a module, choose M here: the module will be called smsc37b787_wdt. Most people will say N. config TQMX86_WDT tristate "TQ-Systems TQMX86 Watchdog Timer" depends on X86 || COMPILE_TEST select WATCHDOG_CORE help This is the driver for the hardware watchdog timer in the TQMX86 IO controller found on some of their ComExpress Modules. To compile this driver as a module, choose M here; the module will be called tqmx86_wdt. Most people will say N. config VIA_WDT tristate "VIA Watchdog Timer" depends on (X86 || COMPILE_TEST) && PCI select WATCHDOG_CORE help This is the driver for the hardware watchdog timer on VIA southbridge chipset CX700, VX800/VX820 or VX855/VX875. To compile this driver as a module, choose M here; the module will be called via_wdt. Most people will say N. config W83627HF_WDT tristate "Watchdog timer for W83627HF/W83627DHG and compatibles" depends on (X86 || COMPILE_TEST) && HAS_IOPORT select WATCHDOG_CORE help This is the driver for the hardware watchdog on the following Super I/O chips. W83627DHG/DHG-P/EHF/EHG/F/G/HF/S/SF/THF/UHG/UG W83637HF W83667HG/HG-B W83687THF W83697HF W83697UG NCT6775 NCT6776 NCT6779 NCT6791 NCT6792 NCT6102D/04D/06D NCT6116D 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 w83627hf_wdt. Most people will say N. config W83877F_WDT tristate "W83877F (EMACS) Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help This is the driver for the hardware watchdog on the W83877F chipset as used in EMACS PC-104 motherboards (and likely 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 w83877f_wdt. Most people will say N. config W83977F_WDT tristate "W83977F (PCM-5335) Watchdog Timer" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help This is the driver for the hardware watchdog on the W83977F I/O chip as used in AAEON's PCM-5335 SBC (and likely 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 w83977f_wdt. config MACHZ_WDT tristate "ZF MachZ Watchdog" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help If you are using a ZF Micro MachZ processor, say Y here, otherwise N. This is the driver for the watchdog timer built-in on that processor using ZF-Logic interface. 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 machzwd. config SBC_EPX_C3_WATCHDOG tristate "Winsystems SBC EPX-C3 watchdog" depends on (X86 || COMPILE_TEST) && HAS_IOPORT help This is the driver for the built-in watchdog timer on the EPX-C3 Single-board computer made by Winsystems, Inc. *Note*: This hardware watchdog is not probeable and thus there is no way to know if writing to its IO address will corrupt your system or have any real effect. The only way to be sure that this driver does what you want is to make sure you are running it on an EPX-C3 from Winsystems with the watchdog timer at IO address 0x1ee and 0x1ef. It will write to both those IO ports. Basically, the assumption is made that if you compile this driver into your kernel and/or load it as a module, that you know what you are doing and that you are in fact running on an EPX-C3 board! To compile this driver as a module, choose M here: the module will be called sbc_epx_c3. config INTEL_MEI_WDT tristate "Intel MEI iAMT Watchdog" depends on INTEL_MEI && X86 select WATCHDOG_CORE help A device driver for the Intel MEI iAMT watchdog. The Intel AMT Watchdog is an OS Health (Hang/Crash) watchdog. Whenever the OS hangs or crashes, iAMT will send an event to any subscriber to this event. The watchdog doesn't reset the the platform. To compile this driver as a module, choose M here: the module will be called mei_wdt. config NI903X_WDT tristate "NI 903x/913x Watchdog" depends on X86 && ACPI select WATCHDOG_CORE help This is the driver for the watchdog timer on the National Instruments 903x/913x real-time controllers. To compile this driver as a module, choose M here: the module will be called ni903x_wdt. config NIC7018_WDT tristate "NIC7018 Watchdog" depends on X86 && ACPI select WATCHDOG_CORE help Support for National Instruments NIC7018 Watchdog. To compile this driver as a module, choose M here: the module will be called nic7018_wdt. config SIEMENS_SIMATIC_IPC_WDT tristate "Siemens Simatic IPC Watchdog" depends on SIEMENS_SIMATIC_IPC && PCI default y select WATCHDOG_CORE select P2SB if X86 help This driver adds support for several watchdogs found in Industrial PCs from Siemens. To compile this driver as a module, choose M here: the module will be called simatic-ipc-wdt. # M68K Architecture config M54xx_WATCHDOG tristate "MCF54xx watchdog support" depends on M548x help To compile this driver as a module, choose M here: the module will be called m54xx_wdt. # MicroBlaze Architecture # MIPS Architecture config ATH79_WDT tristate "Atheros AR71XX/AR724X/AR913X hardware watchdog" depends on ATH79 || (ARM && COMPILE_TEST) help Hardware driver for the built-in watchdog timer on the Atheros AR71XX/AR724X/AR913X SoCs. config BCM47XX_WDT tristate "Broadcom BCM47xx Watchdog Timer" depends on BCM47XX || ARCH_BCM_5301X || COMPILE_TEST select WATCHDOG_CORE help Hardware driver for the Broadcom BCM47xx Watchdog Timer. config RC32434_WDT tristate "IDT RC32434 SoC Watchdog Timer" depends on MIKROTIK_RB532 help Hardware driver for the IDT RC32434 SoC built-in watchdog timer. To compile this driver as a module, choose M here: the module will be called rc32434_wdt. config INDYDOG tristate "Indy/I2 Hardware Watchdog" depends on SGI_HAS_INDYDOG help Hardware driver for the Indy's/I2's watchdog. This is a watchdog timer that will reboot the machine after a 60 second timer expired and no process has written to /dev/watchdog during that time. config JZ4740_WDT tristate "Ingenic jz4740 SoC hardware watchdog" depends on MIPS || COMPILE_TEST depends on COMMON_CLK select WATCHDOG_CORE select MFD_SYSCON help Hardware driver for the built-in watchdog timer on Ingenic jz4740 SoCs. config WDT_MTX1 tristate "MTX-1 Hardware Watchdog" depends on MIPS_MTX1 || (MIPS && COMPILE_TEST) help Hardware driver for the MTX-1 boards. This is a watchdog timer that will reboot the machine after a 100 seconds timer expired. config SIBYTE_WDOG tristate "Sibyte SoC hardware watchdog" depends on CPU_SB1 help Watchdog driver for the built in watchdog hardware in Sibyte SoC processors. There are apparently two watchdog timers on such processors; this driver supports only the first one, because currently Linux only supports exporting one watchdog to userspace. To compile this driver as a loadable module, choose M here. The module will be called sb_wdog. config TXX9_WDT tristate "Toshiba TXx9 Watchdog Timer" depends on CPU_TX49XX || (MIPS && COMPILE_TEST) select WATCHDOG_CORE help Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs. config OCTEON_WDT tristate "Cavium OCTEON SOC family Watchdog Timer" depends on CAVIUM_OCTEON_SOC default y select WATCHDOG_CORE select EXPORT_UASM if OCTEON_WDT = m help Hardware driver for OCTEON's on chip watchdog timer. Enables the watchdog for all cores running Linux. It installs a NMI handler and pokes the watchdog based on an interrupt. On first expiration of the watchdog, the interrupt handler pokes it. The second expiration causes an NMI that prints a message. The third expiration causes a global soft reset. When userspace has /dev/watchdog open, no poking is done from the first interrupt, it is then only poked when the device is written. config MARVELL_GTI_WDT tristate "Marvell GTI Watchdog driver" depends on ARCH_THUNDER || (COMPILE_TEST && 64BIT) default y select WATCHDOG_CORE help Marvell GTI hardware supports watchdog timer. First timeout works as watchdog pretimeout and installed interrupt handler will be called on first timeout. Hardware can generate interrupt to SCP on second timeout but it is not enabled, so second timeout is ignored. If device poke does not happen then system will reboot on third timeout. config BCM2835_WDT tristate "Broadcom BCM2835 hardware watchdog" depends on ARCH_BCM2835 || (OF && COMPILE_TEST) select WATCHDOG_CORE help Watchdog driver for the built in watchdog hardware in Broadcom BCM2835 SoC. To compile this driver as a loadable module, choose M here. The module will be called bcm2835_wdt. config BCM_KONA_WDT tristate "BCM Kona Watchdog" depends on ARCH_BCM_MOBILE || COMPILE_TEST select WATCHDOG_CORE help Support for the watchdog timer on the following Broadcom BCM281xx family, which includes BCM11130, BCM11140, BCM11351, BCM28145 and BCM28155 variants. Say 'Y' or 'M' here to enable the driver. The module will be called bcm_kona_wdt. config BCM_KONA_WDT_DEBUG bool "DEBUGFS support for BCM Kona Watchdog" depends on BCM_KONA_WDT || COMPILE_TEST help If enabled, adds /sys/kernel/debug/bcm_kona_wdt/info which provides access to the driver's internal data structures as well as watchdog timer hardware registres. If in doubt, say 'N'. config BCM7038_WDT tristate "BCM63xx/BCM7038 Watchdog" select WATCHDOG_CORE depends on HAS_IOMEM depends on ARCH_BCMBCA || ARCH_BRCMSTB || BMIPS_GENERIC || BCM63XX || COMPILE_TEST help Watchdog driver for the built-in hardware in Broadcom 7038 and later SoCs used in set-top boxes. BCM7038 was made public during the 2004 CES, and since then, many Broadcom chips use this watchdog block, including some cable modem chips and DSL (63xx) chips. config IMGPDC_WDT tristate "Imagination Technologies PDC Watchdog Timer" depends on HAS_IOMEM depends on MIPS || COMPILE_TEST select WATCHDOG_CORE help Driver for Imagination Technologies PowerDown Controller Watchdog Timer. To compile this driver as a loadable module, choose M here. The module will be called imgpdc_wdt. config LANTIQ_WDT tristate "Lantiq SoC watchdog" depends on LANTIQ select WATCHDOG_CORE help Hardware driver for the Lantiq SoC Watchdog Timer. config LOONGSON1_WDT tristate "Loongson1 SoC hardware watchdog" depends on MACH_LOONGSON32 || COMPILE_TEST select WATCHDOG_CORE help Hardware driver for the Loongson1 SoC Watchdog Timer. config RALINK_WDT tristate "Ralink SoC watchdog" select WATCHDOG_CORE depends on RALINK help Hardware driver for the Ralink SoC Watchdog Timer. config GXP_WATCHDOG tristate "HPE GXP watchdog support" depends on ARCH_HPE_GXP || COMPILE_TEST select WATCHDOG_CORE help Say Y here to include support for the watchdog timer in HPE GXP SoCs. To compile this driver as a module, choose M here. The module will be called gxp-wdt. config MT7621_WDT tristate "Mediatek SoC watchdog" select WATCHDOG_CORE select REGMAP_MMIO select MFD_SYSCON depends on SOC_MT7620 || SOC_MT7621 || COMPILE_TEST help Hardware driver for the Mediatek/Ralink MT7621/8 SoC Watchdog Timer. config PIC32_WDT tristate "Microchip PIC32 hardware watchdog" select WATCHDOG_CORE depends on MACH_PIC32 || (MIPS && COMPILE_TEST) help Watchdog driver for the built in watchdog hardware in a PIC32. Configuration bits must be set appropriately for the watchdog to be controlled by this driver. To compile this driver as a loadable module, choose M here. The module will be called pic32-wdt. config PIC32_DMT tristate "Microchip PIC32 Deadman Timer" select WATCHDOG_CORE depends on MACH_PIC32 || (MIPS && COMPILE_TEST) help Watchdog driver for PIC32 instruction fetch counting timer. This specific timer is typically be used in mission critical and safety critical applications, where any single failure of the software functionality and sequencing must be detected. To compile this driver as a loadable module, choose M here. The module will be called pic32-dmt. # PARISC Architecture # POWERPC Architecture config GEF_WDT tristate "GE Watchdog Timer" depends on GE_FPGA help Watchdog timer found in a number of GE single board computers. config MPC5200_WDT bool "MPC52xx Watchdog Timer" depends on PPC_MPC52xx || COMPILE_TEST help Use General Purpose Timer (GPT) 0 on the MPC5200 as Watchdog. config 8xxx_WDT tristate "MPC8xxx Platform Watchdog Timer" depends on PPC_8xx || PPC_83xx || PPC_86xx || PPC_MPC512x select WATCHDOG_CORE help This driver is for a SoC level watchdog that exists on some Freescale PowerPC processors. So far this driver supports: - MPC8xx watchdogs - MPC83xx watchdogs - MPC86xx watchdogs For BookE processors (MPC85xx) use the BOOKE_WDT driver instead. config PIKA_WDT tristate "PIKA FPGA Watchdog" depends on WARP || (PPC64 && COMPILE_TEST) default y help This enables the watchdog in the PIKA FPGA. Currently used on the Warp platform. config BOOKE_WDT tristate "PowerPC Book-E Watchdog Timer" depends on BOOKE || 4xx select WATCHDOG_CORE help Watchdog driver for PowerPC Book-E chips, such as the Freescale MPC85xx SOCs and the IBM PowerPC 440. Please see Documentation/watchdog/watchdog-api.rst for more information. config BOOKE_WDT_DEFAULT_TIMEOUT int "PowerPC Book-E Watchdog Timer Default Timeout" depends on BOOKE_WDT default 38 if PPC_E500 range 0 63 if PPC_E500 default 3 if !PPC_E500 range 0 3 if !PPC_E500 help Select the default watchdog timer period to be used by the PowerPC Book-E watchdog driver. A watchdog "event" occurs when the bit position represented by this number transitions from zero to one. For Freescale Book-E processors, this is a number between 0 and 63. For other Book-E processors, this is a number between 0 and 3. The value can be overridden by the wdt_period command-line parameter. config MEN_A21_WDT tristate "MEN A21 VME CPU Carrier Board Watchdog Timer" select WATCHDOG_CORE depends on GPIOLIB || COMPILE_TEST help Watchdog driver for MEN A21 VMEbus CPU Carrier Boards. The driver can also be built as a module. If so, the module will be called mena21_wdt. If unsure select N here. # PPC64 Architecture config PSERIES_WDT tristate "POWER Architecture Platform Watchdog Timer" depends on PPC_PSERIES select WATCHDOG_CORE help Driver for virtual watchdog timers provided by PAPR hypervisors (e.g. PowerVM, KVM). config WATCHDOG_RTAS tristate "RTAS watchdog" depends on PPC_RTAS help This driver adds watchdog support for the RTAS watchdog. To compile this driver as a module, choose M here. The module will be called wdrtas. # RISC-V Architecture config STARFIVE_WATCHDOG tristate "StarFive Watchdog support" depends on ARCH_STARFIVE || COMPILE_TEST select WATCHDOG_CORE default ARCH_STARFIVE help Say Y here to support the watchdog of StarFive JH7100 and JH7110 SoC. This driver can also be built as a module if choose M. # S390 Architecture config DIAG288_WATCHDOG tristate "System z diag288 Watchdog" depends on S390 select WATCHDOG_CORE help IBM s/390 and zSeries machines running under z/VM 5.1 or later provide a virtual watchdog timer to their guest that cause a user define Control Program command to be executed after a timeout. LPAR provides a very similar interface. This driver handles both. To compile this driver as a module, choose M here. The module will be called diag288_wdt. # SUPERH (sh + sh64) Architecture config SH_WDT tristate "SuperH Watchdog" depends on SUPERH && (CPU_SH3 || CPU_SH4 || COMPILE_TEST) select WATCHDOG_CORE help This driver adds watchdog support for the integrated watchdog in the SuperH processors. If you have one of these processors and wish to have watchdog support enabled, say Y, otherwise say N. As a side note, saying Y here will automatically boost HZ to 1000 so that the timer has a chance to clear the overflow counter. On slower systems (such as the SH-2 and SH-3) this will likely yield some performance issues. As such, the WDT should be avoided here unless it is absolutely necessary. To compile this driver as a module, choose M here: the module will be called shwdt. # SPARC Architecture # SPARC64 Architecture config WATCHDOG_CP1XXX tristate "CP1XXX Hardware Watchdog support" depends on SPARC64 && PCI help This is the driver for the hardware watchdog timers present on Sun Microsystems CompactPCI models CP1400 and CP1500. To compile this driver as a module, choose M here: the module will be called cpwatchdog. If you do not have a CompactPCI model CP1400 or CP1500, or another UltraSPARC-IIi-cEngine boardset with hardware watchdog, you should say N to this option. config WATCHDOG_RIO tristate "RIO Hardware Watchdog support" depends on SPARC64 && PCI help Say Y here to support the hardware watchdog capability on Sun RIO machines. The watchdog timeout period is normally one minute but can be changed with a boot-time parameter. config WATCHDOG_SUN4V tristate "Sun4v Watchdog support" select WATCHDOG_CORE depends on SPARC64 help Say Y here to support the hypervisor watchdog capability embedded in the SPARC sun4v architecture. To compile this driver as a module, choose M here. The module will be called sun4v_wdt. # XTENSA Architecture # Xen Architecture config XEN_WDT tristate "Xen Watchdog support" depends on XEN select WATCHDOG_CORE help Say Y here to support the hypervisor watchdog capability provided by Xen 4.0 and newer. The watchdog timeout period is normally one minute but can be changed with a boot-time parameter. config UML_WATCHDOG tristate "UML watchdog" depends on UML || COMPILE_TEST # # ISA-based Watchdog Cards # comment "ISA-based Watchdog Cards" depends on ISA config PCWATCHDOG tristate "Berkshire Products ISA-PC Watchdog" depends on ISA help This is the driver for the Berkshire Products ISA-PC Watchdog card. This card 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 different hardware. Please read . The PC watchdog cards can be ordered from . To compile this driver as a module, choose M here: the module will be called pcwd. Most people will say N. config MIXCOMWD tristate "Mixcom Watchdog" depends on ISA help This is a driver for the Mixcom hardware watchdog cards. 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 mixcomwd. Most people will say N. config WDT tristate "WDT Watchdog timer" depends on ISA help If you have a WDT500P or WDT501P watchdog board, say Y here, otherwise N. It is not possible to probe for this board, which means that you have to inform the kernel about the IO port and IRQ that is needed (you can do this via the io and irq parameters) To compile this driver as a module, choose M here: the module will be called wdt. # # PCI-based Watchdog Cards # comment "PCI-based Watchdog Cards" depends on PCI config PCIPCWATCHDOG tristate "Berkshire Products PCI-PC Watchdog" depends on PCI && HAS_IOPORT help This is the driver for the Berkshire Products PCI-PC Watchdog card. This card 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. The card can also monitor the internal temperature of the PC. More info is available at . To compile this driver as a module, choose M here: the module will be called pcwd_pci. Most people will say N. config WDTPCI tristate "PCI-WDT500/501 Watchdog timer" depends on PCI && HAS_IOPORT help If you have a PCI-WDT500/501 watchdog board, say Y here, otherwise N. If you have a PCI-WDT501 watchdog board then you can enable the temperature sensor by setting the type parameter to 501. If you want to enable the Fan Tachometer on the PCI-WDT501, then you can do this via the tachometer parameter. Only do this if you have a fan tachometer actually set up. To compile this driver as a module, choose M here: the module will be called wdt_pci. # # USB-based Watchdog Cards # comment "USB-based Watchdog Cards" depends on USB config USBPCWATCHDOG tristate "Berkshire Products USB-PC Watchdog" depends on USB help This is the driver for the Berkshire Products USB-PC Watchdog card. This card 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. The card can also monitor the internal temperature of the PC. More info is available at . To compile this driver as a module, choose M here: the module will be called pcwd_usb. Most people will say N. config KEEMBAY_WATCHDOG tristate "Intel Keem Bay SoC non-secure watchdog" depends on ARCH_KEEMBAY || (ARM64 && COMPILE_TEST) select WATCHDOG_CORE help This option enable support for an In-secure watchdog timer driver for Intel Keem Bay SoC. This WDT has a 32 bit timer and decrements in every count unit. An interrupt will be triggered, when the count crosses the threshold configured in the register. To compile this driver as a module, choose M here: the module will be called keembay_wdt. endif # WATCHDOG