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

[Andreas Kemnade]

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