kernel/linux.git/include/linux/iio/backend.h, branch v6.12.80

iio: add child nodes support in iio backend framework

2024-08-10T10:17:34+00:00

Add an API to support IIO generic channels binding: http://devicetree.org/schemas/iio/adc/adc.yaml# This new API is needed, as generic channel DT node isn't populated as a device. Add devm_iio_backend_fwnode_get() to allow an IIO device backend consumer to reference backend phandles in its child nodes. Signed-off-by: Olivier Moysan Reviewed-by: Nuno Sa Link: https://patch.msgid.link/20240730084640.1307938-4-olivier.moysan@foss.st.com Signed-off-by: Jonathan Cameron

iio: add enable and disable services to iio backend framework

2024-08-10T10:17:34+00:00

Add iio_backend_disable() and iio_backend_enable() APIs to allow IIO backend consumer to request backend disabling and enabling. Signed-off-by: Olivier Moysan Reviewed-by: Nuno Sa Link: https://patch.msgid.link/20240730084640.1307938-3-olivier.moysan@foss.st.com Signed-off-by: Jonathan Cameron

iio: add read scale and offset services to iio backend framework

2024-08-10T10:17:34+00:00

Add iio_backend_read_scale() and iio_backend_read_offset() services to read channel scale and offset from an IIO backbend device. Also add a read_raw callback which replicates the read_raw callback of the IIO framework, and is intended to request miscellaneous channel attributes from the backend device. Both scale and offset helpers use this callback. Signed-off-by: Olivier Moysan Reviewed-by: Nuno Sa Link: https://patch.msgid.link/20240730084640.1307938-2-olivier.moysan@foss.st.com Signed-off-by: Jonathan Cameron

iio: backend: add a modified prbs23 support

2024-08-03T13:36:45+00:00

Support ADI specific prb23 sequence that can be used both for calibrating or debugging digital interfaces. Signed-off-by: Nuno Sa Link: https://patch.msgid.link/20240802-dev-iio-backend-add-debugfs-v2-3-4cb62852f0d0@analog.com Signed-off-by: Jonathan Cameron

iio: backend: add debugFs interface

2024-08-03T13:36:45+00:00

This adds a basic debugfs interface for backends. Two new ops are being added: * debugfs_reg_access: Analogous to the core IIO one but for backend devices. * debugfs_print_chan_status: One useful usecase for this one is for testing test tones in a digital interface and "ask" the backend to dump more details on why a test tone might have errors. Signed-off-by: Nuno Sa Link: https://patch.msgid.link/20240802-dev-iio-backend-add-debugfs-v2-2-4cb62852f0d0@analog.com Signed-off-by: Jonathan Cameron

iio: backend: introduce struct iio_backend_info

2024-08-03T13:36:45+00:00

Instead of only passing the backend ops when calling devm_iio_backend_register(), pass an info like structure that will contains the ops and additional information. Fow now, the backend name is being added as that will be used by the debugFS interface introduced in a later patch. It also opens the door for further customizations passed by backends. All users of devm_iio_backend_register() were updated accordingly. Signed-off-by: Nuno Sa Link: https://patch.msgid.link/20240802-dev-iio-backend-add-debugfs-v2-1-4cb62852f0d0@analog.com Signed-off-by: Jonathan Cameron

iio: backend: spelling: continuous -> continuous

2024-08-03T09:13:41+00:00

This fixes the spelling in IIO_BACKEND_INTERNAL_CONTINUOUS_WAVE. Signed-off-by: David Lechner Link: https://patch.msgid.link/20240726-iio-backend-spelling-continuous-v1-1-467c6e3f78ff@baylibre.com Signed-off-by: Jonathan Cameron

iio: backend: remove unused parameter

2024-08-03T09:13:36+00:00

Indio_dev was not being used in iio_backend_extend_chan_spec() so remove it. Signed-off-by: Nuno Sa Link: https://patch.msgid.link/20240709-dev-iio-backend-add-debugfs-v1-1-fb4b8f2373c7@analog.com Signed-off-by: Jonathan Cameron

iio: backend: add API for interface tuning

2024-04-29T19:53:26+00:00

This is in preparation for supporting interface tuning in one for the devices using the axi-adc backend. The new added interfaces are all needed for that calibration: * iio_backend_test_pattern_set(); * iio_backend_chan_status(); * iio_backend_iodelay_set(); * iio_backend_data_sample_trigger(). Interface tuning is the process of going through a set of known points (typically by the frontend), change some clk or data delays (or both) and send/receive some known signal (so called test patterns in this change). The receiving end (either frontend or the backend) is responsible for validating the signal and see if it's good or not. The goal for all of this is to come up with ideal delays at the data interface level so we can have a proper, more reliable data transfer. Also note that for some devices we can change the sampling rate (which typically means changing some reference clock) and that can affect the data interface. In that case, it's import to run the tuning algorithm again as the values we had before may no longer be the best (or even valid) ones. Signed-off-by: Nuno Sa Link: https://lore.kernel.org/r/20240426-ad9467-new-features-v2-2-6361fc3ba1cc@analog.com Signed-off-by: Jonathan Cameron

iio: backend: change docs padding

2024-04-29T19:53:26+00:00

Using tabs and maintaining the start of the docs aligned is a pain and may lead to lot's of unrelated changes when adding new members. Hence, let#s change things now and just have a simple space after the member name. Signed-off-by: Nuno Sa Link: https://lore.kernel.org/r/20240426-ad9467-new-features-v2-1-6361fc3ba1cc@analog.com Signed-off-by: Jonathan Cameron