[PATCH v2 0/2] iio: adc: hx711: add HX710B support

[Piyush Patle <piyushpatle228@gmail.com>]

Add support for the HX710B ADC, a variant of the HX711 with the same
GPIO interface but a different channel and gain model.

The first patch updates the devicetree binding to add the
`avia,hx710b` compatible, document the variant-specific behavior, and
add chip-specific properties for supplies, the RATE pin, and an allOf
constraint for HX710B nodes.
The second patch refactors the driver with per-chip configuration,
pulse counts stored in chan->address, a dedicated fixed_gain flag, and
the differential channel descriptor for the HX710B input.

Tested on PocketBeagle2 with an HX710B breakout module. The device
probed successfully and raw readings were stable.

Changes in v2:
- See individual patch changelogs for full details.
- dt-bindings: add dvdd-supply, vsup-supply, rate-gpios; allOf if/then
  for HX710B; fix clock-frequency description; remove dead vendor URL;
  clarify vref not needed (AVDD serves as reference on both chips)
- driver: fix pulse count bug ({25,26}→{1,2}); move counts to
  chan->address; add fixed_gain flag; add .differential/.channel2;
  remove NULL check; drop reset_channel; pass iio_chan_spec * directly

Piyush Patle (2):
  dt-bindings: iio: adc: avia-hx711: add avia,hx710b compatible
  iio: adc: hx711: add support for HX710B

 .../bindings/iio/adc/avia-hx711.yaml          |  61 +++++-
 drivers/iio/adc/Kconfig                       |   9 +-
 drivers/iio/adc/hx711.c                       | 206 ++++++++++++++----
 3 files changed, 225 insertions(+), 51 deletions(-)

-- 
2.43.0