Commit 8dbeb413 authored by Angelo Dureghello's avatar Angelo Dureghello Committed by Jonathan Cameron
Browse files

doc: iio: ad7380: describe offload support 



Add a section to the ad7380 documentation describing how to use the
driver with SPI offloading.

Signed-off-by: default avatarAngelo Dureghello <adureghello@baylibre.com>
Link: https://patch.msgid.link/20250310-wip-bl-spi-offload-ad7380-v4-2-b184b37b7c72@baylibre.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent bbeaec81

Documentation/iio/ad7380.rst

+18 −0
Original line number Diff line number Diff line
@@ -178,6 +178,24 @@ Unimplemented features 
- Power down mode

- CRC indication



SPI offload support

===================



To be able to achieve the maximum sample rate, the driver can be used with the

`AXI SPI Engine`_ to provide SPI offload support.



.. _AXI SPI Engine: http://analogdevicesinc.github.io/hdl/projects/pulsar_adc/index.html



When SPI offload is being used, some attributes will be different.



* ``trigger`` directory is removed.

* ``in_voltage0_sampling_frequency`` attribute is added for setting the sample

  rate.

* ``in_voltage0_sampling_frequency_available`` attribute is added for querying

  the max sample rate.

* ``timestamp`` channel is removed.

* Buffer data format may be different compared to when offload is not used,

  e.g. the ``in_voltage0_type`` attribute.



Device buffers

==============