On Mon, 27 Jan 2025 19:32:45 -0600 David Lechner <dlechner@xxxxxxxxxxxx> wrote: > On 1/27/25 9:12 AM, Jonathan Santos wrote: > > The Wideband Low Ripple filter is used for AD7768-1 Driver. > > Document wideband filter option into filter_type_available > > attribute. > > > > Signed-off-by: Jonathan Santos <Jonathan.Santos@xxxxxxxxxx> > > --- > > v2 Changes: > > * Removed FIR mentions. > > --- > > Documentation/ABI/testing/sysfs-bus-iio | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio > > index f83bd6829285..9b879e7732cd 100644 > > --- a/Documentation/ABI/testing/sysfs-bus-iio > > +++ b/Documentation/ABI/testing/sysfs-bus-iio > > @@ -2291,6 +2291,8 @@ Description: > > * "sinc3+pf2" - Sinc3 + device specific Post Filter 2. > > * "sinc3+pf3" - Sinc3 + device specific Post Filter 3. > > * "sinc3+pf4" - Sinc3 + device specific Post Filter 4. > > + * "wideband" - filter with wideband low ripple passband > > + and sharp transition band. > > > > What: /sys/.../events/in_proximity_thresh_either_runningperiod > > KernelVersion: 6.6 > > I'm a bit shy to make any more suggestions on this one since my previous > suggestions were clearly not the "right way". :-) > > But, the key takeaway I got from the discussion on v1 is that this describes the > _shape_ of the filter. To me, "wideband" describes the size but not the shape. > Would rectangular be the correct shape? > It's tricky. The filter definition is really vague! No filter is ever rectangular. Also, I've just noticed. This one is fully programable. It could be anything! I kind of hope no one cares about that feature as it looks really tricky to support. Wideband normally means 'flattish to a wide range of frequencies'. Not sure how best to convey that.
