linux-kernel - Re: [PATCH 4/8] dt-bindings: iio: dfsdm: move to backend framework

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Date: Sun, 23 Jun 2024 16:01:57 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Olivier Moysan <olivier.moysan@...s.st.com>
Cc: Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>, Lars-Peter Clausen
 <lars@...afoo.de>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Maxime Coquelin
 <mcoquelin.stm32@...il.com>, Alexandre Torgue
 <alexandre.torgue@...s.st.com>, Fabrice Gasnier
 <fabrice.gasnier@...s.st.com>, <alsa-devel@...a-project.org>,
 <linux-iio@...r.kernel.org>, <devicetree@...r.kernel.org>,
 <linux-stm32@...md-mailman.stormreply.com>,
 <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/8] dt-bindings: iio: dfsdm: move to backend framework

On Tue, 18 Jun 2024 18:08:30 +0200
Olivier Moysan <olivier.moysan@...s.st.com> wrote:

> Change the DFSDM binding to use the new IIO backend framework,
> along with the adoption of IIO generic channels.
> This binding change allows to add scaling support to the DFSDM.
> 
> Keep the legacy binding as deprecated for backward compatibility.
> 
> The io-backends property is supported only in generic IIO channel
> binding.
> 
> - Channel description with the generic binding (Audio and Analog):
> 
>   Properties supersed by generic properties:
superseded

>     st,adc-channels: becomes "reg" property in channel node
>     st,adc-channel-names: becomes "label" property in channel node
>   Properties moved to channel child node:
>     st,adc-channel-types, st,adc-channel-clk-src, st,adc-alt-channel
> 
> - Analog binding:
> 
>   DFSDM filter channel is configured as an IIO backend consumer.
>   Add io-backends property in channel child nodes.
> 
>   DFSDM is no more configured as a channel consumer from SD modulator.
>   Use of io-channels in DFSDM node is deprecated.
> 
> - Audio binding:
> 
>   DFSDM audio DAI is configured as a channel consumer from DFSDM filter.
>   No change compare to legacy.
> 
> Signed-off-by: Olivier Moysan <olivier.moysan@...s.st.com>