[v2,0/2] Add max14001 support

Message

Kim Seer Paller June 5, 2023, 1:07 p.m. UTC

It took more time than I expected, but I have followed up on this and now
I'm presenting the patch for your review.

Modified the code based on the implementation of this application note
as a reference:
https://www.analog.com/media/en/technical-documentation/user-guides/guide-to-programming-the-max14001max14002-isolated-adcs--maxim-integrated.pdf
For now, I'm figuring out how to implement daisy chain for future support.

Changes in v2:

 max14001:
  - Replaced verification register definitions with macro.
  - Removed local definition of IIO_DMA_MINALIGN.
  - Changed driver to big endian format and reverse data prior to outputting
  it to the device as per the app note.
  - Utilized default register values instead of zero to clear memory validation
  fault.
  - Converted driver to use custom regmap for register access.
  - Modified scaled value calculation and changed to IIO_VAL_FRACTIONAL_LOG2.
  - Removed offset attribute.
  - Added comments for clarity in write transactions.
  - Misc changes(blank lines...).

 Bindings:
  - Removed unneccessary device tree propertied and updated bindings.

The code was tested using max14001pmb and max14001evsys boards with
raspberry pi 4.

Kim Seer Paller (2):
  dt-bindings:iio:adc: add max14001
  iio: adc: max14001: New driver

 .../bindings/iio/adc/adi,max14001.yaml        |  55 +++
 MAINTAINERS                                   |   8 +
 drivers/iio/adc/Kconfig                       |  10 +
 drivers/iio/adc/Makefile                      |   1 +
 drivers/iio/adc/max14001.c                    | 333 ++++++++++++++++++
 5 files changed, 407 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,max14001.yaml
 create mode 100644 drivers/iio/adc/max14001.c


base-commit: 44149752e9987a9eac5ad78e6d3a20934b5e018d