linux-kernel - Re: [PATCH v4 5/5] docs: iio: ad7380: add adaq4370-4 and adaq4380-4

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Message-ID: <4c457ac4-139c-4df0-958a-fcda94705d02@baylibre.com>
Date: Wed, 30 Oct 2024 09:27:17 -0500
From: David Lechner <dlechner@...libre.com>
To: Julien Stephan <jstephan@...libre.com>,
 Lars-Peter Clausen <lars@...afoo.de>,
 Michael Hennerich <Michael.Hennerich@...log.com>,
 Nuno Sá <nuno.sa@...log.com>,
 Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Jonathan Corbet <corbet@....net>
Cc: linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH v4 5/5] docs: iio: ad7380: add adaq4370-4 and adaq4380-4

On 10/30/24 8:44 AM, Julien Stephan wrote:
> Adding documentation for adaq4370-4 and adaq4380-4 supported devices. In
> particular, document the reference voltage mechanism and the gain
> parameter that are specific to adaq devices.
> 
> Signed-off-by: Julien Stephan <jstephan@...libre.com>
> ---
>  Documentation/iio/ad7380.rst | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/Documentation/iio/ad7380.rst b/Documentation/iio/ad7380.rst
> index 6f70b49b9ef27c1ac32acaefecd1146e5c8bd6cc..1b9777c33e0c3e9e06f72d7c957a012346d4a26a 100644
> --- a/Documentation/iio/ad7380.rst
> +++ b/Documentation/iio/ad7380.rst
> @@ -27,6 +27,8 @@ The following chips are supported by this driver:
>  * `AD7386-4 <https://www.analog.com/en/products/ad7386-4.html>`_
>  * `AD7387-4 <https://www.analog.com/en/products/ad7387-4.html>`_
>  * `AD7388-4 <https://www.analog.com/en/products/ad7388-4.html>`_
> +* `ADAQ4370-4 <https://www.analog.com/en/products/adaq4370-4.html>`_
> +* `ADAQ4380-4 <https://www.analog.com/en/products/adaq4380-4.html>`_
>  
>  
>  Supported features
> @@ -47,6 +49,12 @@ ad7380-4
>  ad7380-4 supports only an external reference voltage (2.5V to 3.3V). It must be
>  declared in the device tree as ``refin-supply``.
>  
> +ADAQ devices
> +~~~~~~~~~~~~
> +
> +adaq4370-4 and adaq4380-4 don't have an external reference, but use a 3V

It's 3.3V, not 3V

> +internal reference derived from one of its supplies (``refin-supply``)
> +
>  All other devices from ad738x family
>  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>  
> @@ -121,6 +129,14 @@ Example for AD7386/7/8 (2 channels parts):
>  
>  When enabling sequencer mode, the effective sampling rate is divided by two.
>  
> +Gain (ADAQ devices only)
> +~~~~~~~~~~~~~~~~~~~~~~~~
> +
> +ADAQ devices have a pin selectable gain in front of each ADC. The appropriate
> +gain is selectable from device tree using the ``adi,gain-milli`` property.
> +Refer to the typical connection diagrams section of the datasheet for pin
> +wiring.
> +
>  Unimplemented features
>  ----------------------
>  
>