Does WDT keep running after kernel crash?

[viniciusmaciel]

Hi,

I want to know if the Watchdog timer continue to run even after the linux kernel crash?

In my current system, Linux 4.9.11 on wandboard, after the linux kernel crashes nothing happen and  I have to reboot manually, which will not be possible when my system goes to field.

[igorpadykov]

Hi Vinicius

in general it should work except cases, when accidentally

wdt clock sources were disabled, described in sect.70.3 Clocks

Chapter 70 Watchdog Timer (WDOG) i.MX6SDL Reference
Manual or changed bits WDZST, WDBG, register WDOGx_WCR.
http://www.nxp.com/assets/documents/data/en/reference-manuals/IMX6SDLRM.pdf 

Best regards
igor
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