Re: [PATCH 0/3] watchdog: omap: Preserve OMAP watchdog across boot to detect faulty boots

From: Diogo Ivo

Date: Fri Sep 11 2026 - 11:24:59 EST

Hi Guenter,

On 9/11/26 4:29 PM, Guenter Roeck wrote:
On 9/11/26 02:17, Diogo Ivo wrote:
Allow the OMAP watchdog to survive being stopped on kernel initialization
so it can detect a faulty boot in cases where the bootloader leaves it
running and the watchdog driver picks it up during kernel init.

- Patch 1 removes a duplicate omap_wdt_start() call left behind by
cd004d8299f1 ("watchdog: Fix OMAP watchdog early handling"). This is
unrelated to the main goal of the series and can be picked up
independently.

- Patch 2 adds support for reading the watchdog boot status. Probe now
checks whether the watchdog is already running and takes it over instead
of blindly stopping it based on early_enable alone. This introduces a
regression possibility, explained in detail in the patch's message.

- Patch 3 marks the OMAP4 watchdog node ti,no-reset-on-init so the
ti-sysc driver stops resetting it. A detailed explaination of why is
also provided in the commit message of the patch.

This series has been tested on a platform based on the VAR-SOM-OM44 from
Variscite, running a TI OMAP4460 SoC.

Please address the issues reported by Sashiko, or explain why they don't apply.

I have just replied to the Sashiko reviews but I'm not sure if you got
the replies as Sashiko did not include your e-mail in its review. If you
did not receive them please let me know and I can resend them. In
any case if you could give your opinion on the comments I left on the
patches about regressions that would be great as I think after the
Sashiko points are addressed that is the main blocker for this series.

Thanks,
Diogo

Thanks,
Guenter