linux-kernel - Re: [PATCH v5 06/13] iio: dac: ds4424: use device match data for chip info

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Message-ID: <aYNVndcMVRj3JsKL@smile.fi.intel.com>
Date: Wed, 4 Feb 2026 16:20:13 +0200
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Oleksij Rempel <o.rempel@...gutronix.de>
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 v5 06/13] iio: dac: ds4424: use device match data for
 chip info

On Wed, Feb 04, 2026 at 03:00:38PM +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.
> 
> This simplifies the probe function and makes it easier to add support for
> new variants like DS4402/DS4404.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...el.com>
with a hope that we get rid an I²C ID requirement at some point.

...

> +struct ds4424_chip_info {
> +	u8 num_channels;

If you wish, you can provide name here that will go to ->name field.
Linker dedups string literals, so it will be just an additional runtime
pointer.

> +};

-- 
With Best Regards,
Andy Shevchenko