linux-kernel - Re: [PATCH v2 1/2] dt-bindings: iio: adc: Add TI ADS1120 binding

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Message-ID: <8ef3fbd1-b746-4379-b615-e3034ec8f39e@baylibre.com>
Date: Mon, 15 Dec 2025 09:58:36 -0600
From: David Lechner <dlechner@...libre.com>
To: Ajith Anandhan <ajithanandhan0406@...il.com>,
 Jonathan Cameron <jic23@...nel.org>
Cc: nuno.sa@...log.com, andy@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: iio: adc: Add TI ADS1120 binding

On 12/15/25 8:49 AM, Ajith Anandhan wrote:
> On 11/18/25 5:49 AM, David Lechner wrote:
>> On 11/15/25 12:31 PM, Jonathan Cameron wrote:
>>> On Sun,  9 Nov 2025 19:41:18 +0530
>>> Ajith Anandhan <ajithanandhan0406@...il.com> wrote:
>>>

...

>>>> +
>>>> +  ti,avdd-is-ref:
>>>> +    type: boolean
>>>> +    description: |
>>>> +      If present, indicates that the AVDD supply voltage is of sufficient
>>>> +      quality and stability to be used as the voltage reference instead of
>>>> +      the internal reference. This allows the driver to select AVDD as the
>>>> +      reference source for potentially better performance.
>>> This one is interesting as I don't recall anyone arguing this made
>>> sense before.  In what way better performance?  Are their boards out
>>> there where this definitely makes sense to do?
>>>
>> Seems harmless to have the property even if no one ever uses it. But I would
>> be curious to know the answers to those questions too.
> 
> 
> I included this property based on the datasheet mentioning AVDD as a possible reference source, butit doesn't claim this provides better performance, and I don't currently have a specific use case or hardware design that requires it.
> 
> How to proceed ? Need your valuable suggestions.
> 
> 
> BR,
> 
> Ajith.
> 
>>
> 

It sounds like it is unlikely to be used in practice, so I won't
object if you want to drop it to keep things simple.