IMX WDT: Difference between revisions
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{{#vardefine:WDT_CONFIG|CONFIG_IMX2_WDT}} | |||
{{#vardefine:WDT_DESCR|IMX2+ Watchdog}} | |||
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{{#vardefine:WDT_CONFIG|CONFIG_IMX_SC_WDT}} | |||
{{#vardefine:WDT_DESCR|IMX SC Watchdog}} | |||
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= Kernel configuration= | = Kernel configuration= | ||
The internal watchdog is enabled by default in the kernel configuration. | The internal watchdog is enabled by default in the kernel configuration. | ||
To verify that the i.MX watchdog driver ( | To verify that the i.MX watchdog driver ({{#var:WDT_CONFIG}}) is enabled in your kernel configuration: | ||
* In menuconfig: Device Drivers -> Watchdog Timer Support -> <*> | * In menuconfig: Device Drivers -> Watchdog Timer Support -> <*> {{#var:WDT_DESCR}}<br> | ||
= Using a command line = | = Using a command line = | ||
Revision as of 12:23, 29 March 2021
VAR-SOM-MX6 watchdog
Kernel configuration
The internal watchdog is enabled by default in the kernel configuration.
To verify that the i.MX watchdog driver (CONFIG_IMX2_WDT) is enabled in your kernel configuration:
- In menuconfig: Device Drivers -> Watchdog Timer Support -> <*> IMX2+ Watchdog
Using a command line
Watchdog will be activated as soon as /dev/watchdog is opened and will reboot unless the watchdog is pinged within timeout (128 is the preconfigured value).
$ echo "1" > /dev/watchdog0
Within 128 seconds the board will reset.
Compile watchdog test application
There's a watchdog testing utility C code example in the kernel source tree: tools/testing/selftests/watchdog-test.c (in older kernels: Documentation/watchdog/src/watchdog-test.c).
To cross compile it use the following command:
$ $CC ./tools/testing/selftests/watchdog-test.c -o ./watchdog-test