How to test wdog2(TZ) in uboot and kernel?

[zohanlin]

Hi all,

I test wdog2 on i.MX6Q with Yocto(kernel 4.9.88)

I tried to test wdog2(TZ) in u-boot and kernel.

In uboot, I  modified ./drivers/watchdog/imx_watchdog.c and replaced WDOG1_BASE_ADDR with WDOG2_BASE_ADDR, it not worked.

In kernel, I don't know how to ensure the wdog2 is worked. But when system reboot, WDOG2_B would be pull low.

I found some info in imx6 Watchdog ,but page not found.

How to test wdog2(TZ) in uboot and kernel?

Could someone tell me how to test it?

Thanks for your help.

[igorpadykov]

Hi zohan

wdog2 is enabled in imx6qdl-sabresd.dtsi

imx6qdl-sabresd.dtsi\dts\boot\arm\arch - linux-imx - i.MX Linux kernel 

for testing one can try wdog unit test:

wdog\test - imx-test - i.MX Driver Test Application Software 

Best regards
igor
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[zohanlin]

Hi igor,

Thanks for you relpy.

But I have a question.

Does wdog2 work on trust zone?

Thanks,

zohan