linux-kernel - Re: [PATCH v3 1/1] dt-bindings: iio: adc: add a7779 doc

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Date: Fri, 31 May 2024 15:51:56 +0100
From: Conor Dooley <conor@...nel.org>
To: Ramona Alexandra Nechita <ramona.nechita@...log.com>
Cc: linux-iio@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH v3 1/1] dt-bindings: iio: adc: add a7779 doc

On Fri, May 31, 2024 at 04:35:52PM +0300, Ramona Alexandra Nechita wrote:
> Add dt bindings for adc ad7779.
> 
> Signed-off-by: Ramona Alexandra Nechita <ramona.nechita@...log.com>
> ---
>  .../ABI/testing/sysfs-bus-iio-adc-ad777x      | 23 +++++
>  .../bindings/iio/adc/adi,ad7779.yaml          | 87 +++++++++++++++++++
>  2 files changed, 110 insertions(+)
>  create mode 100644 Documentation/ABI/testing/sysfs-bus-iio-adc-ad777x
>  create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7779.yaml
> 
> diff --git a/Documentation/ABI/testing/sysfs-bus-iio-adc-ad777x b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad777x
> new file mode 100644
> index 000000000000..0a57fda598e6
> --- /dev/null
> +++ b/Documentation/ABI/testing/sysfs-bus-iio-adc-ad777x
> @@ -0,0 +1,23 @@
> +What:		/sys/bus/iio/devices/iio:deviceX/filter_type_available
> +KernelVersion:  6.1
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		Reading returns a list with the possible filter modes. Only supported by
> +		AD7771.
> +
> +		  * "sinc3"	- The digital sinc3 filter implements three main notches, one at
> +				the maximum ODR (128 kHz or 32 kHz, depending on the
> +				power mode) and another two at the ODR frequency selected to
> +				stop noise aliasing into the pass band.
> +
> +		  * "sinc5"	- The sinc5 filter implements five notches, one at
> +				the maximum ODR (128 kHz or 32 kHz, depending on the
> +				power mode) and another four at the ODR frequency
> +				selected to stop noise aliasing into the pass band.
> +
> +What:		/sys/bus/iio/devices/iio:deviceX/filter_type
> +KernelVersion:  6.1
> +Contact:	linux-iio@...r.kernel.org
> +Description:
> +		Set the filter mode of the differential channel. The current sampling_frequency
> +		is set according to the filter range. Only supported by AD7771.

This patch is really confusing to me. Why is there a file documenting
the sysfs interface for a driver that isn't in the tree? Shouldn't this
patch be part of a series that adds the driver? I suggest you speak to
Nuno or another collogue about how to submit a series.

Thanks,
Conor.

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