Re: [PATCH v3 7/9] regulator: mt6392: Add support for MT6392 regulator

[Luca Leonardo Scorcia]

Il giorno gio 19 mar 2026 alle ore 06:04 Chen-Yu Tsai
<wenst@xxxxxxxxxxxx> ha scritto:

> If this PMIC is anything like the MT6358, then it has 0.01V fine
> tuning for most if not all the LDOs. It is sometimes needed as
> a rail may have a 0.04V boost that would otherwise be invisible
> to the system. And then if you have something like 3.04V set in
> the DT constraints, you end up with something the regulator driver
> doesn't support, but the hardware does.
>
> Please see how it's done in the MT6358 driver. I spent a lot of
> time on that driver to make it actually support the full range
> of voltages, and describing the supplies.
>

I had a good look at the datasheet (MT6392 PMIC Datasheet v1.0 08 Dec.
2016) and unfortunately I did not see any fine tuning option in there.
I'm sure this data sheet is not perfect as it's missing some regulator
registers that are clearly used in the Android sources, but there's no
mention of fine tuning in that code either. I guess it does not have
that capability.

I will shortly submit v4 that hopefully addresses the rest of the comments.

Thanks for your help!
--
Luca Leonardo Scorcia
l.scorcia@xxxxxxxxx