This series adds calibration support to the ad4695 driver. This has the same "odd" gain and offset registers that are being used for calibration as discussed recently in the ad4030 series [1]. So if the ranges in the *_available attributes seem a bit big for calibration, that is why. The official datasheet explanation for this feature is, "The AD4695/AD4696 include offset and gain error correction functionality to correct for first-order nonidealities in a full [analog front end] signal chain." [1]: https://lore.kernel.org/linux-iio/20240814193814.78fe45cc@jic23-huawei/ --- David Lechner (4): iio: adc: ad4695: add 2nd regmap for 16-bit registers iio: adc: ad4695: implement calibration support doc: iio: ad4695: update for calibration support iio: ABI: document ad4695 new attributes Documentation/ABI/testing/sysfs-bus-iio | 3 + Documentation/iio/ad4695.rst | 7 +- drivers/iio/adc/ad4695.c | 242 +++++++++++++++++++++++++++++--- 3 files changed, 234 insertions(+), 18 deletions(-) --- base-commit: 0f718e10da81446df0909c9939dff2b77e3b4e95 change-id: 20240819-ad4695-gain-offset-c748d7addf27 Best regards, -- David Lechner <dlechner@xxxxxxxxxxxx>
