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- # Software watchdog configuration
- # Copyright (c) 2020 Libre Solar Technologies GmbH
- # SPDX-License-Identifier: Apache-2.0
- menuconfig TASK_WDT
- bool "Task-level software watchdog"
- select REBOOT
- help
- Enable task watchdog
- The task watchdog allows to have individual watchdog channels
- per thread, even if the hardware supports only a single watchdog.
- config TASK_WDT_CHANNELS
- int "Maximum number of task watchdog channels"
- depends on TASK_WDT
- default 5
- range 2 100
- help
- The timeouts for each channel are stored in an array. Allocate only
- the required amount of channels to reduce memory footprint.
- config TASK_WDT_HW_FALLBACK
- bool "Use hardware watchdog as a fallback"
- depends on TASK_WDT
- default y
- help
- This option allows to specify a hardware watchdog device in the
- application that is used as an additional safety layer if the task
- watchdog itself gets stuck.
- config TASK_WDT_MIN_TIMEOUT
- int "Minimum timeout for task watchdog (ms)"
- depends on TASK_WDT_HW_FALLBACK
- default 100
- range 1 10000
- help
- The task watchdog uses a continuously restarted k_timer as its
- backend. This value specifies the minimum timeout in milliseconds
- among all task watchdogs used in the application.
- If a hardware watchdog is configured as a fallback for the task
- watchdog, its timeout is set to this value plus
- TASK_WDT_HW_FALLBACK_DELAY.
- config TASK_WDT_HW_FALLBACK_DELAY
- int "Additional delay for hardware watchdog (ms)"
- depends on TASK_WDT_HW_FALLBACK
- default 20
- range 1 1000
- help
- The timeout of the hardware watchdog fallback will be increased by
- this value to provide sufficient time for corrective actions in the
- callback function.
- In addition to that, the delay allows to compensate deviations
- between different clock sources for the hardware watchdog and the
- kernel timer. This is especially important if the hardware watchdog
- is clocked by an inaccurate low-speed RC oscillator.
- config TASK_WDT_TIMEOUT
- int "timeout for task watchdog (ms)"
- depends on TASK_WDT_HW_FALLBACK
- default 1000
- range 1 10000000
- help
- The task watchdog uses a continuously restarted k_timer as its
- backend. This value specifies the timeout in milliseconds
- among all task watchdogs used in the application.
- If a hardware watchdog is configured as a fallback for the task
- watchdog, its timeout is set to this value plus
- TASK_WDT_HW_FALLBACK_DELAY.
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