[PATCH 00/22] Extend device support for AD5686 driver

[Rodrigo Alencar via B4 Relay]

This series adds support for multiple nanoDAC parts, adding triggered
buffer and gain control support to the ad5686 DAC driver family, along
with a number of driver cleanups and fixes.

Initial patches update the device-tree bindings:
- Add compatible entries for missing and new parts;
- Add GPIO properties for RESET, GAIN and LDAC pins;
- Add missing power supplies properties.

Driver cleanups and fixes:
- Refactor include headers (IWYU);
- Switch to device managed mutex initialization;
- Drop enum chip id in favor of per-device chip_info structs;
- Fix voltage reference control on single-channel devices;
- Fix powerdown control on dual-channel devices;
- Introduce bus ops struct with a sync() operation for batching
  bus transfers.

New functionality:
- Device support for: AD5316R, AD5675, AD5697R, AD5313R, AD5317R,
  AD5674, AD5679, AD5687, AD5687R, AD5689 and AD5689R;
- Consume optional reset and new power supplies;
- LDAC GPIO handling (active-low, held low when unused);
- SPI bus sync() implementation for batching multiple transfers;
- Triggered buffer support, leveraging LDAC and sync() to flush
  all channel writes atomically;
- Gain control support through the scale property.

Signed-off-by: Rodrigo Alencar <rodrigo.alencar@xxxxxxxxxx>
---
Rodrigo Alencar (22):
      dt-bindings: iio: dac: ad5696: extend device support
      dt-bindings: iio: dac: ad5696: add reset/ldac/gain gpio support
      dt-bindings: iio: dac: ad5696: rework on power supplies
      dt-bindings: iio: dac: ad5686: extend device support
      dt-bindings: iio: dac: ad5686: add reset/ldac/gain gpio support
      dt-bindings: iio: dac: ad5686: rework on power supplies
      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: fix powerdown control
      iio: dac: ad5686: fix input raw value check
      iio: dac: ad5686: add support for missing power supplies
      iio: dac: ad5686: create bus ops struct
      iio: dac: ad5686: extend device support with new parts
      iio: dac: ad5686: update device list description
      iio: dac: ad5686: consume optional reset signal
      iio: dac: ad5686: add ldac gpio
      iio: dac: ad5686: implement new sync() op for the spi bus
      iio: dac: ad5686: add triggered buffer support
      iio: dac: ad5686: add gain control support

 .../devicetree/bindings/iio/dac/adi,ad5686.yaml    |  61 +-
 .../devicetree/bindings/iio/dac/adi,ad5696.yaml    |  60 +-
 drivers/iio/dac/Kconfig                            |  18 +-
 drivers/iio/dac/ad5686-spi.c                       | 200 ++++--
 drivers/iio/dac/ad5686.c                           | 775 +++++++++++++--------
 drivers/iio/dac/ad5686.h                           | 144 ++--
 drivers/iio/dac/ad5696-i2c.c                       |  94 +--
 7 files changed, 906 insertions(+), 446 deletions(-)
---
base-commit: eade2b843d9b1f668fc1775f15611bb0a1999cd9
change-id: 20260325-ad5313r-iio-support-882ad39356e1

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