linux-kernel - Re: [PATCH v7 5/6] dt-bindings: iio: adc: ad7192: Add AD7194 support

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Date: Fri, 10 May 2024 13:05:32 +0300
From: Alisa-Dariana Roman <alisadariana@...il.com>
To: Conor Dooley <conor@...nel.org>
Cc: michael.hennerich@...log.com, linux-iio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 alexandru.tachici@...log.com, lars@...afoo.de, jic23@...nel.org,
 robh@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 lgirdwood@...il.com, broonie@...nel.org, andy@...nel.org,
 nuno.sa@...log.com, marcelo.schmitt@...log.com, bigunclemax@...il.com,
 dlechner@...libre.com, okan.sahin@...log.com, fr0st61te@...il.com,
 alisa.roman@...log.com, marcus.folkesson@...il.com, schnelle@...ux.ibm.com,
 liambeguin@...il.com
Subject: Re: [PATCH v7 5/6] dt-bindings: iio: adc: ad7192: Add AD7194 support

On 30.04.2024 20:21, Conor Dooley wrote:
> On Tue, Apr 30, 2024 at 07:29:45PM +0300, Alisa-Dariana Roman wrote:
>> +      diff-channels:
>> +        description:
>> +          Both inputs can be connected to pins AIN1 to AIN16 by choosing the
>> +          appropriate value from 1 to 16.
>> +        items:
>> +          minimum: 1
>> +          maximum: 16
>> +
>> +      single-channel:
>> +        description:
>> +          Positive input can be connected to pins AIN1 to AIN16 by choosing the
>> +          appropriate value from 1 to 16. Negative input is connected to AINCOM.
>> +        items:
>> +          minimum: 1
>> +          maximum: 16
> 
> Up to 16 differential channels and 16 single-ended channels, but only 16
> pins? Would the number of differential channels not max out at 8?

Hello, Conor! I really appreciate the feedback!

The way I thought about it, the only thing constraining the number of 
channels is the reg number (minimum: 0, maximum: 271). 272 channels 
cover all possible combinations (16*16 differential and 16 single ended) 
and I thought there is no need for anything stricter. I added items: 
minimum:1 maximum:16 to make sure the numbers are from 1 to 16, 
corresponding to AIN1-AIN16.

Please let me know what should be improved!

Kind regards,
Alisa-Dariana Roman.