Add support for the ROHM BD79105 ADC
(and do some minor simplifications to the ad7476 driver while at it).

The first 2 patches were originally sent as an RFC:
https://lore.kernel.org/all/cover.1754041258.git.mazziesaccount@gmail.com/

Revision history:
  v1 => v2:
   - Two new patches:
     5/10 "Limit the scope of the chip_info" and
     6/10 "Drop convstart chan_spec"
     Please, let me know if you think some of the changes should be
     squashed.
   - Multiple fixes as suggested during v1 review. More accurate
     changelog included in individual patches
  Simplification RFC => ROHM BD79105 support series v1:
   - Use spi_get_device_match_data()
   - Fix uV to mV conversion
   - Rewording of commit message
   - Added patches 3 to 8.

Matti Vaittinen (10):
  iio: adc: ad7476: Simplify chip type detection
  iio: adc: ad7476: Simplify scale handling
  iio: adc: ad7476: Use mV for internal reference
  iio: adc: ad7476: Use correct channel for bit info
  iio: adc: ad7476: Limit the scope of the chip_info
  iio: adc: ad7476: Drop convstart chan_spec
  iio: adc: ad7476: Conditionally call convstart
  dt-bindings: iio: adc: ad7476: Add ROHM bd79105
  iio: adc: ad7476: Support ROHM BD79105
  MAINTAINERS: A driver for simple 1-channel SPI ADCs

 .../bindings/iio/adc/adi,ad7476.yaml          |  54 ++
 MAINTAINERS                                   |   5 +
 drivers/iio/adc/ad7476.c                      | 462 +++++++++---------
 3 files changed, 290 insertions(+), 231 deletions(-)


base-commit: 93ef68672bb353838cdf8314be8765c05768916b
-- 
2.50.1