linux-kernel - Re: [PATCH v4 06/13] iio: dac: ds4424: use device match data for chip info

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <aYHLRvfJH54XumUA@pengutronix.de>
Date: Tue, 3 Feb 2026 11:17:42 +0100
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Andy Shevchenko <andriy.shevchenko@...el.com>
Cc: Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, kernel@...gutronix.de,
	linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org, Andy Shevchenko <andy@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	David Jander <david@...tonic.nl>
Subject: Re: [PATCH v4 06/13] iio: dac: ds4424: use device match data for
 chip info

On Tue, Feb 03, 2026 at 12:03:23PM +0200, Andy Shevchenko wrote:
> On Tue, Feb 03, 2026 at 10:34:26AM +0100, Oleksij Rempel wrote:
> > Refactor the driver to use device match data instead of checking ID enums
> > in a switch statement.
> > 
> > Define a `ds4424_chip_info` structure to hold variant-specific attributes
> > (currently just the channel count) and attach it directly to the I2C and
> > OF device ID tables.
> > 
> > Use `client->name` instead of `id->name` to decouple the probe function
> > from the legacy `i2c_device_id` structure.
> > 
> > This simplifies the probe function and makes it easier to add support for
> > new variants like DS4402/DS4404.
> 
> ...
> 
> > -	indio_dev->name = id->name;
> 
> > +	indio_dev->name = client->name;
> 
> Isn't this an ABI breakage?

I can't confirm it.

before all patches:
root@...troKit:~ cat /sys/bus/iio/devices/iio:device3/name 
ds4424

after:
root@...troKit:~ cat /sys/bus/iio/devices/iio:device3/name 
ds4424



-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |