linux-kernel - Re: [PATCH v4 1/3] dt-bindings: touchscreen: trivial-touch: Drop 'interrupts' requirement for old Ilitek

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Message-ID: <CAMuHMdUuYJ6pSFXy9KBsgkbJ003HEEKhMPgUHkQbdJPFchR39w@mail.gmail.com>
Date: Tue, 20 Jan 2026 11:23:03 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Marek Vasut <marek.vasut@...lbox.org>, linux-input@...r.kernel.org, 
	Frank Li <Frank.Li@....com>, Conor Dooley <conor+dt@...nel.org>, 
	Dmitry Torokhov <dmitry.torokhov@...il.com>, Job Noorman <job@...rman.info>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v4 1/3] dt-bindings: touchscreen: trivial-touch: Drop
 'interrupts' requirement for old Ilitek

On Sat, 17 Jan 2026 at 19:34, Krzysztof Kozlowski <krzk@...nel.org> wrote:
> On 17/01/2026 16:33, Marek Vasut wrote:
> > On 1/17/26 12:22 PM, Krzysztof Kozlowski wrote:
> >> On Sat, Jan 17, 2026 at 01:12:02AM +0100, Marek Vasut wrote:
> >>> The old Ilitek touch controllers V3 and V6 can operate without
> >>> interrupt line, in polling mode. Drop the 'interrupts' property
> >>> requirement for those four controllers. To avoid overloading the
> >>> trivial-touch, fork the old Ilitek V3/V6 touch controller binding
> >>> into separate document.
> >>
> >> One if: block is fine, so IMO, this should stay in original binding
> >> especially that more devices like some azoteq or semtech might have same
> >> rule of not requiring interrupt line. Anyway, no big deal.
> > I am not sure about the other non-ilitek devices, but the fruitboards do
> > use at least goodix and etm/edt touch controllers without interrupt line
> > too, those I have on my desk (those two have separate, more extensive,
> > binding document). I also suspect we will see more of those touch
> > controllers with optional interrupt line, so if we do, I think we can
> > re-combine the binding documents again ?
>
> Yes.

IMHO more churn, and more git blame mismatches...
Why not keep them in a single document in the first place, like in v1?

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds