[PATCH 15/17] iio: cdc: ad7746: Add device specific ABI documentation.

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From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

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@xxxxxxxxxx>
---
 Documentation/ABI/testing/sysfs-bus-iio-cdc-ad7746 | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio-cdc-ad7746 b/Documentation/ABI/testing/sysfs-bus-iio-cdc-ad7746
new file mode 100644
index 000000000000..6db81725b5d2
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-iio-cdc-ad7746
@@ -0,0 +1,11 @@
+What:		/sys/.../iio:deviceX/in_capacitableY_calibbias_calibration
+What:		/sys/.../iio:deviceX/in_capacitableY_calibscale_calibration
+KernelVersion:	5.19
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Write 1 to trigger a calibration of the calibbias or
+		calibscale. For calibscale, a fullscale capacitance should
+		be connected to the capacitance input and a
+		calibscale_calibration then started.  For calibbias see
+		the device datasheet section on "capacitive system offset
+		calibration".
-- 
2.35.3




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