How to test WDOG functionality in i.Mx8DX board?

Raana · ‎12-10-2020

Dear Team,

Currently, I'm working on WDOG in our i.Mx8DX based custom board.

There I'm using L4.14.98_2.0.0 source.

I'm trying to test the WDOG functionality in it.

So, I'm running the below existing application

./wdt_driver_test.out 2 1 0 &

I can bale to see the reboot prints on console but when I'm probing the "SCU_WDOG_OUT" it's not pulsing.

Anything need to do specifically for i.Mx8X wdog ?

Is there any modification required in SCU side ?

Please guide me to move further.

Thank You.

Best Regards,

J.P.Raja

igorpadykov · ‎12-10-2020

Hi Raja

one can try in wdog driver imx_sc_wdt_start() change SC_TIMER_WDOG_ACTION_PARTITION to SC_TIMER_WDOG_ACTION_BOARD

L4.14.98_2.0.0 is not good kernel for testing i.MX8QXP(DX) processors, in particular

latest rev.C0 is not supported as described below, column "Supported Platforms"

Best regards
igor

Raana · ‎12-14-2020

Dear Igor,

Thanks for your quick response.

We are in the final stage of release process. So, we can't change the release version.

When I'm checking with my kernel, I couldn't find the imx_sc_wdt.c file as well as "imx_sc_wdt_start" function.

Just a macro definition is there in, "include/soc/imx8/sc/svc/timer/api.h" file.

What can I do further ?

How to test the functionality without changing the kernel version?

Thank You.

Best Regards,

J.P.Raja

igorpadykov · ‎12-14-2020

Hi Raja

what processor revision used in the case.

Best regards
igor

Raana · ‎12-16-2020

Dear Igor,

Currently we are using i.Mx8DX5 (b0 silicon) based custom board.

Thank You.

Best Regards,

J.P.Raja

igorpadykov · ‎12-16-2020

Hi Raja

one can try to add wdog initialization is scfw board.c like:

timer_set_wdog_timeout(pt_boot, 15000);
timer_set_wdog_action(SC_PT, pt_boot, SC_TIMER_WDOG_ACTION_BOARD);
timer_start_wdog(pt_boot, 0);

Description of that functions can be found in sc_fw_api_qx_b0.pdf included in

Best regards
igor