mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 02:33:07 +00:00
34e452dd02
Currently all shell command docs are put in the doc/usage root. Let's group them into cmd/ sub-directory. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
77 lines
1.6 KiB
ReStructuredText
77 lines
1.6 KiB
ReStructuredText
.. 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.
|