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

From: Conor Dooley
Date: Fri May 31 2024 - 10:52:34 EST


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@xxxxxxxxxx>
> ---
> .../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@xxxxxxxxxxxxxxx
> +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@xxxxxxxxxxxxxxx
> +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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