[PATCH v2 0/2] Add support for AD4113

[Dumitru Ceclan via B4 Relay <devnull+dumitru.ceclan.analog.com@kernel.org>]

This patch series adds support for the AD4113 ADC within the existing
AD7173 driver.

The AD4113 is a low power, low noise, 16-bit, Σ-Δ analog-to-digital
converter (ADC) that integrates an analog front end (AFE) for four
fully differential or eight single-ended inputs.

The part is not released yet and the documentation is not public.
Register map is identical to AD4114 besides the lower width data
register and the GPIO register.

Particularities of this model:
- 16 bit data register
- no temperature sensor
- no current inputs
- input buffers
- internal reference
- external reference REF-/REF+
- no second external reference REF2-/REF2+
- no AVDD2 supply
- 2 GPIO pins with config bits starting at a higher position in register
- 8 VINx inputs with voltage divider
- 16 channel registers and 8 setup registers

Signed-off-by: Dumitru Ceclan <dumitru.ceclan@analog.com>
---
Changes in v2:
- correctly set realbits and storagebits to 16 in iio_chan_spec
- describe bindings restrictions in commit message due to lack of
  sufficient diff context
- describe model differences better in cover letter
- Link to v1: https://lore.kernel.org/r/20240807-ad4113-v1-0-2d338f702c7b@analog.com

---
Dumitru Ceclan (2):
      dt-bindings: adc: ad7173: add support for ad4113
      iio: adc: ad7173: add support for ad4113

 .../devicetree/bindings/iio/adc/adi,ad7173.yaml    |  3 ++
 drivers/iio/adc/ad7173.c                           | 36 +++++++++++++++++++++-
 2 files changed, 38 insertions(+), 1 deletion(-)
---
base-commit: 1c61e13d7dc9003662bd7fd6064dfea67e64b014
change-id: 20240725-ad4113-baa63ff99245

Best regards,
-- 
Dumitru Ceclan <dumitru.ceclan@analog.com>