U-boot standalone application crash system after about 20sec running, is it because watchdog timeout? what

[HZhu.12]

With STM32MP157C-DK2 kit, I am testing U-boot standalone example "hello world" application, it print out some information and then stay in a loop until a key input detected to terminate the application. I found out the example code running for about 20sec and then crash and system restarted, because there is no error message, so I don't believe the standalone code crash but the system crash from a watchdog timeout, would someone confirm what I am speculated here?

some suggestion? is there a function I can add to kick watchdog inside while loop?

[Bumsik Kim]

This might be somewhat related to my issue too: https://community.st.com/s/question/0D50X0000BL8wcRSQR/linux-watchdog-driver-is-broken

My issue is about broken Linux watchdog driver, but this might be also applied to U-Boot driver if the codebase is shared.