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78 lines
1.6 KiB
ReStructuredText
78 lines
1.6 KiB
ReStructuredText
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.. SPDX-License-Identifier: GPL-2.0+:
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wdt command
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============
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Synopsis
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--------
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::
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wdt list
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wdt dev [<name>]
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wdt start <timeout_ms> [flags]
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wdt stop
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wdt reset
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wdt expirer [flags]
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Description
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-----------
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The wdt command is used to control watchdog timers.
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The 'wdt list' command shows a list of all watchdog devices.
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The 'wdt dev' command called without argument shows the current watchdog device.
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The current device is set when passing the name of the device as argument.
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The 'wdt start' command starts the current watchdog timer.
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The 'wdt stop' command stops the current watchdog timer.
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The 'wdt reset' command resets the current watchdog timer without stopping it.
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The 'wdt expire' command let's the current watchdog timer expire immediately.
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This will lead to a reset.
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name
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name of the watchdog device
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timeout_ms
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timeout interval in milliseconds
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flags
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unsigned long value passed to the driver. The usage is driver specific.
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The value is ignored by most drivers.
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Example
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-------
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=> wdt dev
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No watchdog timer device set!
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=> wdt list
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watchdog@1c20ca0 (sunxi_wdt)
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=> wdt dev watchdog@1c20ca0
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=> wdt dev
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dev: watchdog@1c20ca0
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=> wdt start 3000
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=> wdt reset
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=> wdt stop
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=> wdt expire
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U-Boot SPL 2022.04-rc3 (Mar 25 2022 - 13:48:33 +0000)
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In the example above '(sunxi_wdt)' refers to the driver for the watchdog
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device.
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Configuration
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-------------
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The command is only available if CONFIG_CMD_WDT=y.
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Return value
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------------
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The return value $? is 0 if the command succeeds, 1 upon failure.
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