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

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Message-ID: <578745f0-0865-4195-9237-6d41c7fd55f2@kernel.org>
Date: Sat, 17 Jan 2026 19:34:02 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Marek Vasut <marek.vasut@...lbox.org>
Cc: 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 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.

Best regards,
Krzysztof