linux-kernel - Re: [PATCH v3 1/7] dt-bindings: input: syna,rmi4: document syna,pdt-fallback-desc

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Message-ID: <b3a5ec89-0125-4b01-8cca-69b9985b6089@kernel.org>
Date: Tue, 25 Mar 2025 08:36:22 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: David Heidelberg <david@...t.cz>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>, Rob Herring
 <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, "Jason A. Donenfeld" <Jason@...c4.com>,
 Matthias Schiffer <matthias.schiffer@...tq-group.com>,
 Vincent Huang <vincent.huang@...synaptics.com>, linux-input@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht,
 Caleb Connolly <caleb.connolly@...aro.org>
Subject: Re: [PATCH v3 1/7] dt-bindings: input: syna,rmi4: document
 syna,pdt-fallback-desc

On 24/03/2025 19:00, David Heidelberg wrote:
> On 10/03/2025 10:45, Krzysztof Kozlowski wrote:
>> On Sat, Mar 08, 2025 at 03:08:37PM +0100, David Heidelberg wrote:
>>> From: Caleb Connolly <caleb.connolly@...aro.org>
>>>
>>> This new property allows devices to specify some register values which
>>> are missing on units with third party replacement displays. These
>>> displays use unofficial touch ICs which only implement a subset of the
>>> RMI4 specification.
>>
>> These are different ICs, so they have their own compatibles. Why this
>> cannot be deduced from the compatible?
> 
> Yes, but these identify as the originals.

It does not matter how they identify. You have the compatible for them.
If you cannot add compatible for them, how can you add dedicated
property for them?

Best regards,
Krzysztof