Re: [PATCH 1/1] iio: light: isl29018: support cover-glass gain compensation via DT

[Joshua Crofts]

On Thu, 4 Jun 2026 at 09:18, Andy Shevchenko
<andriy.shevchenko@xxxxxxxxx> wrote:
>
> On Thu, Jun 04, 2026 at 07:47:23AM +0200, Herman van Hazendonk wrote:
> > Boards that mount the sensor under a tinted or coated cover glass need
> > to compensate for the optical loss before downstream consumers can map
> > the reading onto a useful lux range. The driver already exposes a
> > runtime knob through in_illuminance0_calibscale, but every user has to
> > re-apply it after every reboot (or rely on a board-specific udev rule),
> > and a power-of-two cover gain like 100x is a hardware constant of the
> > board rather than a policy choice that belongs in userspace.
> >
> > Add an "isil,cover-comp-gain" device-tree property that seeds calibscale
> > at probe, mirroring the pattern tsl2563.c already uses for the same
> > class of problem (amstaos,cover-comp-gain). The default stays 1 so
> > existing systems are unaffected, and userspace can still re-tune via
> > the sysfs attribute afterwards.
>
> Haven't DT schema patches needed to go separately?

Yes, with the correct subject line/commit message title as well.
(e.g. dt-bindings: iio: light: isl29018: add support cover gain comp)

-- 
Kind regards

CJD