[PATCH v2 0/4] This series adds support for Texas Instruments OPT4041 Ambient light sensor

[Jesper X Nilsson <jesper.x.nilsson@axis.com>]

Extend the opt4001 driver to support OPT4041, since it is so similar to
OPT4001. The OPT4041 adds a second channel, a wide band channel ranging
from 380nm to 1000nm. The register map is almost the same for both
devices. OPT4001 has an internal fifo of size four, OPT4041 has two
fifos of size two, one for each channel.

Since OPT4041 has two channels it has one bit in register 0Bh to select
which channel is compared to the threshold register. The driver does not
support setting the threshold registers, so no new support has been
added for this.

The OPT4041 is pin compatible and has the same package as
opt4001-sot-5x3. Although the device id is different, I added a new
compatible string since the driver already had different compatible
strings to differentiate between the two OPT4001.

Datasheet: https://www.ti.com/lit/gpn/opt4041
Signed-off-by: Jesper X Nilsson <jesper.x.nilsson@axis.com>

---
Changes in v2:
- Drop tag Assited-by: LLM from commit messages
- Include patch from Andy: Re-use generic struct s32_fract
- Add trailing commas to structs where it was missing
- Sort variables in reverse xmas tree order in opt4001_read_raw_value()
- Return -ENODATA if i2c_get_match() returns NULL
- Update tristate summary and copy the string to MODULE_DESCRIPTION()
  and to the comment in the top of the driver
- Change the help text to included OPT4001 and OPT4041 on seperate lines
- Link to v1: https://patch.msgid.link/20261023-opt4041-v1-0-45227f82d05c@axis.com

To: Jonathan Cameron <jic23@kernel.org>
To: David Lechner <dlechner@baylibre.com>
To: Nuno Sá <nuno.sa@analog.com>
To: Andy Shevchenko <andy@kernel.org>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Stefan Windfeldt-Prytz <stefan.windfeldt-prytz@axis.com>
Cc: linux-iio@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

---
Andy Shevchenko (1):
      iio: light: opt4001: Re-use generic struct s32_fract

Jesper X Nilsson (3):
      dt-bindings: iio: light: opt4001: add opt4041
      iio: light: opt4001: refactor driver to prepare to support more devices
      iio: light: opt4001: add support for opt4041

 .../devicetree/bindings/iio/light/ti,opt4001.yaml  |   9 +-
 drivers/iio/light/Kconfig                          |   6 +-
 drivers/iio/light/opt4001.c                        | 164 +++++++++++++++------
 3 files changed, 133 insertions(+), 46 deletions(-)
---
base-commit: a3b3580713f3ac5a32dc2874ee546828977a1d68
change-id: 20261007-opt4041-18315d8510df

Best regards,
--  
Jesper X Nilsson <jesper.x.nilsson@axis.com>