This is the first series of three on updating the AD5686 driver.

A bigger patch series was sent before ("Extend device support for AD5686 driver"),
but this is not exactly a v2:

https://lore.kernel.org/r/20260422-ad5313r-iio-support-v1-0-ed7dca001d1b@analog.com

This one adds a number of cleanups and fixes, like:
- Refactor include headers (IWYU);
- Remove redundant register definition;
- Drop enum chip id in favor of per-device chip_info structs;
- Fix internal voltage reference control for single-channel devices;
- Acquire lock when doing power down control;
- Fix powerdown control for dual-channel devices;

Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com>
---
Rodrigo Alencar (10):
      iio: dac: ad5686: refactor include headers
      iio: dac: ad5686: remove redundant register definition
      iio: dac: ad5686: drop enum id
      iio: dac: ad5686: add of_match table to the spi driver
      iio: dac: ad5686: fix ref bit initialization for single-channel parts
      iio: dac: ad5686: acquire lock when doing powerdown control
      iio: dac: ad5686: fix powerdown control on dual-channel devices
      iio: dac: ad5686: fix input raw value check
      iio: dac: ad5686: cleanup doc header of local structs
      iio: dac: ad5686: create bus ops struct

 drivers/iio/dac/ad5686-spi.c |  73 ++++--
 drivers/iio/dac/ad5686.c     | 544 +++++++++++++++++++++----------------------
 drivers/iio/dac/ad5686.h     | 116 ++++-----
 drivers/iio/dac/ad5696-i2c.c |  80 ++++---
 4 files changed, 418 insertions(+), 395 deletions(-)
---
base-commit: d1b86ecd0b377b36aa6581d2bcf73ba43a9e3c8d
change-id: 20260426-ad5686-fixes-63ea68811bdb

Best regards,
-- 
Rodrigo Alencar <rodrigo.alencar@analog.com>