ARM: mach-at91: how to stop U-Boot/SPL from disabling the watchdog timer on SAMAD3 Xplained

Michael Opdenacker michael.opdenacker at
Fri Dec 10 09:32:25 CET 2021

Hi Quentin,

On 12/9/21 5:43 PM, Quentin Schulz wrote:
> From a quick look at the code, you need to enable CONFIG_WDT_AT91 and
> the watchdog won't be disabled anymore by the SPL.
> See:
> and

Good catch, thanks!
Indeed setting CONFIG_WDT_AT91=y did the trick.

I didn't consider enabling the watchdog driver to avoid disabling the
watchdog timer!
Thanks again,

Michael Opdenacker, Bootlin
Embedded Linux and Kernel engineering

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