Add iio driver and DT binding for the Microchip PAC1921 Current/Power monitor. Implemented most of the features with few limitations listed in the driver commit message. Tested with a Pine64 host board connected to a PAC1921 click board [1] via I2C. The PAC1921 click board embeds the Microchip PAC1921 device and a 10 mOhms shunt resistor. The PAC1921 datasheet is at [2]. [1]: https://www.mikroe.com/pac1921-click [2]: https://ww1.microchip.com/downloads/en/DeviceDoc/PAC1921-Data-Sheet-DS20005293E.pdf Signed-off-by: Matteo Martelli <matteomartelli3@xxxxxxxxx> --- Changes in v2: - DT binding: remove vendor specific gains, add vdd-supply, add read/int gpio and fix properties order in example - Remove parsing of gains from DT - Handle vdd regulator - Fix return value in filter_en write handler - Link to v1: https://lore.kernel.org/r/20240703-iio-pac1921-v1-0-54c47d9180b6@xxxxxxxxx --- Matteo Martelli (2): dt-bindings: iio: adc: add binding for pac1921 iio: adc: add support for pac1921 .../ABI/testing/sysfs-bus-iio-adc-pac1921 | 45 + .../bindings/iio/adc/microchip,pac1921.yaml | 71 ++ MAINTAINERS | 7 + drivers/iio/adc/Kconfig | 10 + drivers/iio/adc/Makefile | 1 + drivers/iio/adc/pac1921.c | 1038 ++++++++++++++++++++ 6 files changed, 1172 insertions(+) --- base-commit: 529d2e1900642eba6df28307e26e19793e227546 change-id: 20240606-iio-pac1921-77fa0fa3ac11 Best regards, -- Matteo Martelli <matteomartelli3@xxxxxxxxx>
