[PATCH v6 05/12] power-domain: Add refcounting

[Francesco Dolcini]

On Tue, Apr 15, 2025 at 03:29:09PM +0530, Neha Malcom Francis wrote:
> On 15/04/25 15:20, Miquel Raynal wrote:
> >>> Francesco, are you also testing on K3 platforms?
> >>>
> >>
> >> Yes he would be, since the firmware print is K3 firmware.
> >>
> >>> Can one of you boot with the patch below applied? It should partially
> >>> revert the commit to the ancient behaviour, while adding more debug
> >>> traces (please enable the debug logs as well). This should clarify
> >>> which one of the 3 different path is likely failing. It should also help
> >>> identify who's the user that fails to enable/disable its own power
> >>> domain. I will need to know what board/SoC was used for the test, so I
> >>> can look the relevant driver up.
> >>
> >> Booted on j784s4_evm
> >>
> >> https://gist.github.com/nehamalcom/b09687a523bec89f9df3537fdd99b6f3
> 
> ^
> >>
> >> Currently debugging on my build where I hang in console_init itself, I
> >> think the path for failure is different here, will confirm.
> > 
> > Thanks a lot for your feedback. Normally by applying the diff shared in
> > my previous e-mail, you should have the console back. If not, maybe
> > there is something else involved and the blamed commit is just the first
> > showing an underlying problem.
> 
> I do have console back with that patch, see the gist link above. What I
> meant was the path of failure seems to be different, it's looking like
> with my version of firmware the serial driver probe
> (ns16550_serial_probe) tries to do a readb() and fails, this could
> possibly be because the device was not powered on to begin with. Whereas
> in another case (what Francesco is seeing), this issue is not run into.

For the record, my logs and tests are on Verdin AM62 (that uses a TI AM625 SoC).

Francesco