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