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