On Thu, 30 May 2024 10:14:07 -0500 David Lechner <dlechner@xxxxxxxxxxxx> wrote: > Up to now, the IIO subsystem has only supported a single scan type per > channel. This scan type determines the binary format of the data in the > buffer when doing buffered reads. > > For simple devices, there is only one scan type and all is well. But > for more complex devices, there may be multiple scan types. For example, > ADCs with a resolution boost feature that adds more bits to the raw > sample data. Traditionally, for slow devices, we've just always used the > highest resolution mode, but for high performance ADCs, this may not be > always practical. Manipulating data after every read can hurt performance > and in the case of hardware buffers, it may not be possible to change the > format of the data in the buffer at all. There are also ADCs where > enabling the higher resolution can only be done if oversampling is also > enabled which may not be desireable. > > To allow for more flexibility, we would like to add support for multiple > scan types per channel. > > To avoid having to touch every driver, we implemented this in a way that > preserves the existing scan_type field. See the "iio: add support for > multiple scan types per channel" the details. The first couple of patches > are just preparation for this. > > [1]: https://lore.kernel.org/linux-iio/CAMknhBHOXaff__QyU-wFSNNENvs23vDX5n_ddH-Dw3s6-sQ9sg@xxxxxxxxxxxxxx/ Nice series. Applied to the togreg branch of iio.git and pushed out as testing for 0-day to poke at it. Obviously this v3 hasn't been on list that long, but there is still time as I doubt I'll push out a non rebasing tree for a week or so. This week is looking too busy! Thanks, Jonathan
