iio: backend: add debugFs interface

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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 <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240802-dev-iio-backend-add-debugfs-v2-2-4cb62852f0d0@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Nuno Sa 2024-08-02 16:27:00 +02:00 • committed by Jonathan Cameron

parent 2256f37e24

commit cdf01e0809

4 changed files with 180 additions and 0 deletions

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20

Documentation/ABI/testing/debugfs-iio-backend

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1

MAINTAINERS

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145

drivers/iio/industrialio-backend.c

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14

include/linux/iio/backend.h

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