i.MX8 board hang on watchdog time out

[amit_gondaliya]

i.MX8 board hang on watchdog time out.

I have custom i.MX8 board ,

When I write below command on board, it got hanged and I need to do power cycle to make it functional again.

command

echo 1 > /dev/watchdog.

[Kernel configuration: imx2+ and imx8 watchdog driver are enable from kernel configuration.]

[igorpadykov]

Hi Amit

to have reliable wdog reset it is necessary to implement schematic

solution in such way, that this signal behaved as RESET SWITCH,

shortly removing all power supplies from board. For example

on i.MX8QM board SCU_WDOG_OUT i.MX8QM connected to

U23A, U10A (PC33PF8100) PMIC_WDOG_IN and acts as
"RESET SWITCH".

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------