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iMX6UL reset reason

Question asked by Alexey Ermakov on Aug 30, 2019
Latest reply on Aug 30, 2019 by igorpadykov

I try to detect last reset reason in u-boot.

I use iMX6UL-evk evaluation board, default configs for u-boot and buildroot for this board.

To test last reason reset feature I folow these steps:

1) Booting in buildroot.

2) Disabling watchdog daemon.

3) Board resets on watchdog timeout.

In U-boot debug I can see reset reason "Reset cause: POR", and it does not change even if the reset occurred due to a watchdog timeout. To detect reset cause u-boot reads  "SRC Reset Status Register (SRC_SRSR)".


I have written u-boot module which reads " Watchdog Reset Status Register (WDOGx_WRSR)", and it tells same (POR reason)

Do I need to do something to detect reset reason?