[PATCH 0/2] Add support for AS7343 multi-spectral sensor

[Chang Yu]

This series adds initial support for the AMS AS7343 14-channel
multi-spectral sensor.

The sensor has 14 optical channels (11 visible + NIR + clear +
flicker) in total. This initial driver supports reading raw counts
from all 12 spectral channels (11 visible + NIR) via sysfs and basic
power management.

Not yet supported:
- Configurable integration time and gain
- Interrupt support
- Clear (VIS) channel and flicker detection

The driver uses `extend_name` to differentiate channels, exposing
files like in_intensity_F1_raw for channel F1, etc. via sysfs.

Patch 1 adds device tree bindings.
Patch 2 adds the driver.

Testing was performed on a Raspberry Pi 4.

Datasheet: [1]

Link: https://look.ams-osram.com/m/5f2d27fff9a874d2/original/AS7343-14-Channel-Multi-Spectral-Sensor.pdf [1]

Chang Yu (2):
  dt-bindings: iio: light: add as7343
  iio: light: add AS7343 multi-spectral sensor driver

 .../bindings/iio/light/ams,as7343.yaml        |  46 +++
 MAINTAINERS                                   |   7 +
 drivers/iio/light/Kconfig                     |  11 +
 drivers/iio/light/Makefile                    |   1 +
 drivers/iio/light/as7343.c                    | 309 ++++++++++++++++++
 5 files changed, 374 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/light/ams,as7343.yaml
 create mode 100644 drivers/iio/light/as7343.c

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2.55.0