linux-kernel - Re: [PATCH 1/6] dt-bindings: spi: Add spi-buses property

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Message-ID: <b18db31d-47e5-44bb-a671-c8d8a9f2cd82@baylibre.com>
Date: Wed, 12 Nov 2025 10:52:34 -0600
From: David Lechner <dlechner@...libre.com>
To: Mark Brown <broonie@...nel.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Marcelo Schmitt <marcelo.schmitt@...log.com>,
 Michael Hennerich <michael.hennerich@...log.com>,
 Nuno Sá <nuno.sa@...log.com>,
 Jonathan Cameron <jic23@...nel.org>, Andy Shevchenko <andy@...nel.org>,
 Sean Anderson <sean.anderson@...ux.dev>, linux-spi@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-iio@...r.kernel.org
Subject: Re: [PATCH 1/6] dt-bindings: spi: Add spi-buses property

On 11/10/25 11:04 AM, Mark Brown wrote:
> On Thu, Oct 30, 2025 at 05:42:44PM -0500, David Lechner wrote:
>> On 10/30/25 8:51 AM, Rob Herring wrote:
> 
>>> But it can't really be 2 independent buses/controllers unless the ADC 
>>> has 2 completely independent interfaces, right?
> 
>> Correct.
> 
>> The proposed property really only concerns the data lines (tx/rx). It doesn't
>> care if there is 1 or 2 SCLK lines and it doesn't care if there is only 1 CS
>> line.
> 
>> So maybe spi-data-buses would be a better name for the property? Or
>> spi-data-ports (using the NXP FlexSPI controller docs terminology)?
>> Or spi-data-channels?
> 
> This bindings discussion seems to have stalled out?

Yes, it seems so. I sent a v2 with with the property changed to "spi-data-buses"
in hopes that that it would be good enough, or if not, get the conversation going
again. [1]

[1]: https://lore.kernel.org/linux-iio/20251107-spi-add-multi-bus-support-v2-1-8a92693314d9@baylibre.com/