Re: [PATCH 0/7] sy7636a: power the panel only during updates

[Pablo Mazzini]

Mainline, on top of linux-next. I started looking at the hwmon IIO
bridge. Coordinating and cross-reviewing further work sounds good.

On Mon, Oct 26, 2026 at 9:37 AM Andreas Kemnade <andreas@xxxxxxxxxxxx> wrote:
>
> On Mon, 26 Oct 2026 00:39:11 +0000
> Pablo Mazzini <pmazzini@xxxxxxxxx> wrote:
>
> > The SY7636A hwmon driver keeps VCOM on from probe, so a display driver
> > can not power the panel only during updates.
> >
> Yes, that is the common use case, power things on, tune update process
> to the temperature, update, power off. So it makes completely sense.
>
> > Read the temperature in the regulator driver instead, as the TPS65185
> > and FP9931 drivers do, and remove the hwmon driver. Boards that relied
> > on VCOM staying on mark it always-on. The regulator also switches VCOM
> > with VCOM_EN, gains VCOM voltage control and binds to the I2C device
> > directly.
> >
> > Tested on a PocketBook Verse (B288).
> >
> Which kernel do you use? Just curious, maybe some further upstreaming
> actions might be coordinated or cross-reviewed.
> There was discussion about in-kernel hwmon readout interface like it
> exists for iio.
>
> Regards,
> Andreas