linux-kernel - Re: [PATCH 09/13] i2c: nomadik: fetch timeout-usecs property from devicetree

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Message-Id: <CZGR61YHK1DJ.SVRE78BJ9WB4@bootlin.com>
Date: Wed, 28 Feb 2024 14:39:55 +0100
From: Théo Lebrun <theo.lebrun@...tlin.com>
To: "Wolfram Sang" <wsa@...nel.org>
Cc: "Linus Walleij" <linus.walleij@...aro.org>, "Andi Shyti"
 <andi.shyti@...nel.org>, "Rob Herring" <robh+dt@...nel.org>, "Krzysztof
 Kozlowski" <krzysztof.kozlowski+dt@...aro.org>, "Conor Dooley"
 <conor+dt@...nel.org>, "Thomas Bogendoerfer" <tsbogend@...ha.franken.de>,
 <linux-arm-kernel@...ts.infradead.org>, <linux-i2c@...r.kernel.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <linux-mips@...r.kernel.org>, "Gregory Clement"
 <gregory.clement@...tlin.com>, "Vladimir Kondratiev"
 <vladimir.kondratiev@...ileye.com>, "Thomas Petazzoni"
 <thomas.petazzoni@...tlin.com>, "Tawfik Bayouk"
 <tawfik.bayouk@...ileye.com>
Subject: Re: [PATCH 09/13] i2c: nomadik: fetch timeout-usecs property from
 devicetree

Hello Wolfram,

On Wed Feb 28, 2024 at 11:49 AM CET, Wolfram Sang wrote:
> > That sounds good. I have not used this prop in the DTS as it does not
> > make much sense for an eval board. The target is production boards.
>
> ...
>
> > My upcoming question is how to move forward on this series. I can do the
> > patch to i2c_parse_fw_timings() in the next revision. That way it gets
> > added alongside the first user of this feature. Would it work for you?
>
> Hmmm, to be honest I have a bit of an issue with the 'no user' problem.
> There is a driver which uses this feature, okay. But there is no
> upstream hardware which uses this driver with this new feature. This
> makes maintaining harder ("Who uses this feature?" - "Someone" - "How do
> they use it? Can we modify it?" - "Dunno").

The alternative is that I keep going with a new revision of i2c-nomadik
that manually parses the prop. It'll be refactored if/when the I2C core
provides a better way to access the value. Is that OK?

Thanks,

--
Théo Lebrun, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com