linux-kernel - Re: [RFC PATCH 0/2] iio: adc: ad7476: Simplifications

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Message-ID: <nt4epgtqzptq3c35nz36qlpvkpzlabzpb7vd2jugbgg3gmman6@jipgkhkcfjr4>
Date: Fri, 1 Aug 2025 13:23:02 +0100
From: Nuno Sá <noname.nuno@...il.com>
To: Matti Vaittinen <mazziesaccount@...il.com>
Cc: Matti Vaittinen <matti.vaittinen@...rohmeurope.com>, 
	Lars-Peter Clausen <lars@...afoo.de>, Michael Hennerich <Michael.Hennerich@...log.com>, 
	Jonathan Cameron <jic23@...nel.org>, David Lechner <dlechner@...libre.com>, 
	Nuno Sá <nuno.sa@...log.com>, Andy Shevchenko <andy@...nel.org>, 
	Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, linux-iio@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 0/2] iio: adc: ad7476: Simplifications

On Fri, Aug 01, 2025 at 01:06:46PM +0300, Matti Vaittinen wrote:
> This series suggests some simplifications to the ad7476 ADC. It is
> currently 100% untested, and shouldn't be merged as is. I'd like to hear
> opinions on these changes before adding support to the ROHM BD79105 ADC.
> 
> Intention of the patch 1 is pretty trivial. I'd just like to hear if
> people think the enum + ID table approach is preferred over direct
> pointers to IC specific structs in SPI device's driver_data.
> 
> Real reason for the RFC version is the patch 2. It aims to clear the
> supply handling logic. I did also an alternate version which requires
> the names of the regulators to be provided in the chip_data:
> https://github.com/M-Vaittinen/linux/commit/cf5b3078feb17f9a0069b2c7c86f6d980e879356
> 
> I believe the version in the link --^
> is clearer, but it can potentially help people to add issues with supply
> enable ordering.
> 
> I can't still say if the patch 2 contained in this series is better, or
> if the one behind the link is better way to go. So, RFC it is :)
> 
> Matti Vaittinen (2):
>   iio: adc: ad7476: Simplify chip type detection
>   iio: adc: ad7476: Simplify scale handling
> 
>  drivers/iio/adc/ad7476.c | 376 +++++++++++++++++----------------------
>  1 file changed, 164 insertions(+), 212 deletions(-)
> 
> -- 
> 2.50.1
> 

With the suggestion given by Jonathan on the first patch:
(I also dunno there's someone with variable voltages...)

Reviewed-by: Nuno Sá <nuno.sa@...log.com>