iio: cdc: ad7746: Add device specific ABI documentation.

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

The datasheet description of offset calibration is complex, so for that
on just refer the reader to the device datasheet.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220626122938.582107-16-jic23@kernel.org

Jonathan Cameron 3 years ago cc21231e 6d6c7609

+11

1 changed file

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Documentation

ABI

testing

sysfs-bus-iio-cdc-ad7746

+11

Documentation/ABI/testing/sysfs-bus-iio-cdc-ad7746

··· 1 + What: /sys/.../iio:deviceX/in_capacitableY_calibbias_calibration 2 + What: /sys/.../iio:deviceX/in_capacitableY_calibscale_calibration 3 + KernelVersion: 6.1 4 + Contact: linux-iio@vger.kernel.org 5 + Description: 6 + Write 1 to trigger a calibration of the calibbias or 7 + calibscale. For calibscale, a full scale capacitance should 8 + be connected to the capacitance input and a 9 + calibscale_calibration then started. For calibbias see 10 + the device datasheet section on "capacitive system offset 11 + calibration".