Add ad738x driver, test script, example code, rst file and emu xml.

[spectrum70]

Description

Add support for the ad738x serie.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How has this been tested?

pytest -v --hw=ad7381 --emu --emu-xml=./test/emu/devices/ad7381.xml ./test/test_ad738x.py
================================================================ test session starts =================================================================
platform linux -- Python 3.11.9, pytest-8.2.2, pluggy-1.5.0 -- /home/angelo/dev-baylibre/adi/pyadi-iio/.venv/bin/python3.11
cachedir: .pytest_cache
metadata: {'Python': '3.11.9', 'Platform': 'Linux-6.5.0-rc2-devel-00345-gc2782531397f-x86_64-with-glibc2.39', 'Packages': {'pytest': '8.2.2', 'pluggy': '1.5.0'}, 'Plugins': {'libiio': '0.0.18', 'cov': '5.0.0', 'metadata': '3.1.1', 'html': '3.2.0'}}
rootdir: /home/angelo/dev-baylibre/adi/pyadi-iio
configfile: pyproject.toml
plugins: libiio-0.0.18, cov-5.0.0, metadata-3.1.1, html-3.2.0
collected 1 item                                                                                                                                     

test/test_ad738x.py::test_ad738x_rx_data[1-adi.ad738x] SKIPPED (Test not valid in emulation mode)                                              [100%]

================================================================= 1 skipped in 3.06s =================================================================
Server stopped


invoke precommit
Running supported_parts check
No parts missing from supported_parts.md
---------------

pre-commit run --all-files
codespell................................................................Passed
isort....................................................................Passed
Check Yaml...............................................................Passed
Fix End of Files.........................................................Passed
Trim Trailing Whitespace.................................................Passed
Check for merge conflicts................................................Passed
Debug Statements (Python)................................................Passed
Check docstring is first.................................................Passed
Flake8...................................................................Passed
black....................................................................Passed
blacken-docs.............................................................Passed
Insert license in comments...............................................Passed

example on target  (*)
$ python3 -m ad738x_example
{'voltage0-voltage1': array([-1193.59130785, -1193.18847582, -1193.18847582, ...,
       -1193.18847582, -1193.59130785, -1193.99413988]), 'voltage2-voltage3': array([ 1649.99999898,     0.        ,     0.        , ...,
       -3299.99999795, -1649.99999898,  1649.99999898])}

(*)
Example on target requires:

1. to set uri as the target board uri
2. on target board:
   cd /sys/bus/iio/devices/iio:device0/
   mkdir /sys/kernel/config/iio/triggers/hrtimer/ad7380_timer
   echo ad7380_timer > trigger/current_trigger && iio_attr -d ad7380_timer sampling_frequency 10000

Test Configuration:

• Hardware: Host PC, arch linux, target Zynq zed
• OS: arch linux

uImage/devicetree/BOOT.BIN as in
https://baylibre.atlassian.net/browse/ADI-424

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have signed off all commits and they contain "Signed-off by: "
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[threexc]

Looks good to me.

[spectrum70]

Hi @tfcollins ,
could you maybe have a look ? Thanks.

[tfcollins]

Just some monitor tweaks needed

[spectrum70]

Hi @tfcollins,

• fixed above points
• re-run all the tests above

ytest -v --hw=ad7381 --emu --emu-xml=./test/emu/devices/ad7381.xml ./test/test_ad738x.py
================================================= test session starts ==================================================
platform linux -- Python 3.11.9, pytest-8.2.2, pluggy-1.5.0 -- /home/angelo/dev-baylibre/adi/pyadi-iio/.venv/bin/python3.11
cachedir: .pytest_cache
metadata: {'Python': '3.11.9', 'Platform': 'Linux-6.5.0-rc2-devel-00345-gc2782531397f-x86_64-with-glibc2.40', 'Packages': {'pytest': '8.2.2', 'pluggy': '1.5.0'}, 'Plugins': {'libiio': '0.0.18', 'cov': '5.0.0', 'metadata': '3.1.1', 'html': '3.2.0'}}
rootdir: /home/angelo/dev-baylibre/adi/pyadi-iio
configfile: pyproject.toml
plugins: libiio-0.0.18, cov-5.0.0, metadata-3.1.1, html-3.2.0
collected 1 item                                                                                                       

test/test_ad738x.py::test_ad738x_rx_data[1-adi.ad738x] SKIPPED (Test not valid in emulation mode)                [100%]

================================================== 1 skipped in 3.06s ==================================================

invoke precommit
Running supported_parts check
No parts missing from supported_parts.md
------------------------



pre-commit run --all-files
codespell................................................................Passed
isort....................................................................Passed
Check Yaml...............................................................Passed
Fix End of Files.........................................................Passed
Trim Trailing Whitespace.................................................Passed
Check for merge conflicts................................................Passed
Debug Statements (Python)................................................Passed
Check docstring is first.................................................Passed
Flake8...................................................................Passed
black....................................................................Passed
blacken-docs.............................................................Passed
Insert license in comments...............................................Passed

Thanks