[PATCH v8 00/11] iio: adc: hx711: add HX710B support

[Piyush Patle <piyushpatle228@gmail.com>]

Add support for the AVIA HX710B ADC, a HX711-compatible converter with
the same GPIO interface but a different channel-selection model and a
fixed gain of 128.

Compared to v7, this series folds in the remaining review feedback:

- patches 01-04: add Acked-by from Conor Dooley
- patch 06: reorder hx711_chip_info fields so channels and num_channels
  are adjacent; annotate channels with __counted_by_ptr(num_channels)
  (Jonathan Cameron)
- patch 08: add blank line between int val declaration and its first use
  in hx711_reset() (Andy Shevchenko, Jonathan Cameron)
- patch 11: add blank line between linux/ and linux/iio/* include groups;
  replace the open-coded triggered-buffer struct with
  IIO_DECLARE_BUFFER_WITH_TS(u32, buffer, 3) (Jonathan Cameron)

Tested on PocketBeagle2 with an HX710B breakout module. The device
probed successfully, all three channels returned stable raw readings,
and alternating reads confirmed channel switching between the
differential input and the DVDD-AVDD supply monitor path.

Build-tested with:
- make -s W=1 drivers/iio/adc/hx711.o
- make -s dt_binding_check \
  DT_SCHEMA_FILES=Documentation/devicetree/bindings/iio/adc/avia-hx711.yaml
- pahole -C hx711_chip_info drivers/iio/adc/hx711.o

Piyush Patle (11):
  dt-bindings: iio: adc: hx711: clean up existing binding text
  dt-bindings: iio: adc: hx711: add VSUP supply property
  dt-bindings: iio: adc: hx711: add RATE GPIO property
  dt-bindings: iio: adc: hx711: add HX710B support
  iio: adc: hx711: move scale computation to per-device storage
  iio: adc: hx711: introduce hx711_chip_info structure
  iio: adc: hx711: pass trailing pulse count into hx711_read
  iio: adc: hx711: split variable assignments in hx711_read and
    hx711_reset
  iio: adc: hx711: localize loop iterators in hx711_read
  iio: adc: hx711: pass iio_chan_spec to hx711_reset_read
  iio: adc: hx711: add support for HX710B

 .../bindings/iio/adc/avia-hx711.yaml          |  77 ++++-
 drivers/iio/adc/Kconfig                       |   8 +-
 drivers/iio/adc/hx711.c                       | 311 ++++++++++++++----
 3 files changed, 312 insertions(+), 84 deletions(-)

-- 
2.43.0