Re: [PATCH v2 3/3] Documentation: ABI: IIO: Drop AD4130 specific filter_type_available options

[David Lechner]

On 1/7/25 9:13 AM, Marcelo Schmitt wrote:
> The only driver exporting filter_type_available attribute is ad7779 and it
> only supports sinc3 and sinc5 filters. Remove options that are not
> presented through filter_type_available attribute.
> 
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
> ---
> Maybe this is not worth it (or desirable?) since the options may come back in
> the future if new drivers happen to need them.

I would be tempted to add filter_type{,_available} attributes to the ad4130
driver that mirrors the existing filter_mode{,_available} attributes. We can't
remove filter_mode since that would break things, but having filter_type in
addition to that would mean than userspace tools could standardize on
filter_type and not have to make a special exception for the different naming
on ad4130.

Then we wouldn't need to delete the extra items here and we wouldn't have to
repeat the docs for sysfs-bus-iio-adc-ad4130. Those docs can just have the
deprecation paragraph and mention that it returns values identical to the
filter_type attributes for backwards compatibility.