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

Message ID 20220418192907.763933-16-jic23@kernel.org (mailing list archive)
State Superseded
Headers show
Series staging/iio: Clean up AD7746 CDC driver and move from staging. | expand

Commit Message

Jonathan Cameron April 18, 2022, 7:29 p.m. UTC 
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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

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@vger.kernel.org
+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".