topic Re: How to test WDOG functionality in i.Mx8DX board? in i.MX Processors

How to test WDOG functionality in i.Mx8DX board?

Raana — Thu, 10 Dec 2020 12:43:32 GMT

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

Re: How to test WDOG functionality in i.Mx8DX board?

igorpadykov — Fri, 11 Dec 2020 00:23:16 GMT

Hi Raja

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

https://source.codeaurora.org/external/imx/linux-imx/tree/drivers/watchdog/imx_sc_wdt.c?h=imx_5.4.47_2.2.0

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"

https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applications-processors:IMXLINUX?tab=In-Depth_Tab

Best regards
igor

Re: How to test WDOG functionality in i.Mx8DX board?

Raana — Mon, 14 Dec 2020 13:11:54 GMT

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

Re: How to test WDOG functionality in i.Mx8DX board?

igorpadykov — Tue, 15 Dec 2020 02:28:29 GMT

Hi Raja

what processor revision used in the case.

Best regards
igor

Re: How to test WDOG functionality in i.Mx8DX board?

Raana — Wed, 16 Dec 2020 11:01:06 GMT

Dear Igor,

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

Thank You.

Best Regards,

J.P.Raja

Re: How to test WDOG functionality in i.Mx8DX board?

igorpadykov — Wed, 16 Dec 2020 12:46:06 GMT

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

SCFW Porting Kit

Best regards
igor