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Date: Fri, 5 Apr 2024 20:56:53 +0200
From: Andreas Kemnade <andreas@kemnade.info>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: dmitry.torokhov@gmail.com, robh+dt@kernel.org,
 krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
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 linux-kernel@vger.kernel.org, caleb.connolly@linaro.org
Subject: Re: [PATCH v2 2/2] Input: edt-ft5x06 - add ft5426
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On Fri, 5 Apr 2024 20:21:19 +0300
Andy Shevchenko <andy.shevchenko@gmail.com> wrote:

> On Fri, Apr 5, 2024 at 7:28=E2=80=AFPM Andreas Kemnade <andreas@kemnade.i=
nfo> wrote:
> > On Fri, 5 Apr 2024 18:13:45 +0300
> > Andy Shevchenko <andy.shevchenko@gmail.com> wrote: =20
> > > On Fri, Apr 5, 2024 at 1:20=E2=80=AFAM Andreas Kemnade <andreas@kemna=
de.info> wrote: =20
>=20
> ...
>=20
> > > > @@ -1484,6 +1484,7 @@ static const struct of_device_id edt_ft5x06_o=
f_match[] =3D {
> > > >         { .compatible =3D "edt,edt-ft5206", .data =3D &edt_ft5x06_d=
ata },
> > > >         { .compatible =3D "edt,edt-ft5306", .data =3D &edt_ft5x06_d=
ata },
> > > >         { .compatible =3D "edt,edt-ft5406", .data =3D &edt_ft5x06_d=
ata },
> > > > +       { .compatible =3D "focaltech,ft5426", .data =3D &edt_ft5506=
_data }, =20
> > >
> > > Why a different vendor prefix?
> > > In case you need to use this one, keep the list sorted, currently this
> > > splits the edt,* ones.
> > > =20
> > How do I know whether to use evervision or edt instead? =20
>=20
> Ask DT people, the vendor-prefixes lists both...
>=20
> > I sorted by the numbers. Looking at datasheets for other controllers I =
see
> > https://www.displayfuture.com/Display/datasheet/controller/FT5x06.pdf
> > it only mentions FocalTech Systems Co., Ltd. =20
>=20
> But does the driver use that? AFAICS it uses edt. Perhaps it's due to
> a business split, not to my knowledge anyway.
>=20
well, the fact is that there were several tried to add duplicates to this
driver to the kernel using focaltech prefixes e.g.
https://lore.kernel.org/linux-input/47209259-9e57-f263-bf48-10f233c63b69@re=
dhat.com/

My guess it is somehow about owner of the firmware in the chip vs the chip =
itself.

Regards,
Andreas