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Raspberry Pi 4b ends up in a reboot loop since commit #3885768 running Zephyr #1980

@Snenz

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@Snenz

I'm trying to boot Zephyr on a Raspberry Pi 4b. With the changes made to boot/start4.elf in commit 3885768 the Pi ends up in a reboot loop, continuously rebooting after around 17 seconds of uptime.

This appears to be related to the new watchdog option mentioned in the commit message?
"firmware: arm_loader: Add config option to enable the watchdog timer from the firmware"

After adding the option dtparam=watchdog=off to my config.txt, everything seems to be working fine again. Is there a new option to disable the watchdog in a different way in the config.txt (regarding the commit message)?

My main concern with this change is that the behaviour unexpectedly changed from the opt-in to an opt-out behaviour. Was this intended?

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