[PATCH v2 2/3] Documentation: ABI: iio: Add offsets for some sensors

Gwendal Grignou
2020-09-01T03:00:32Z

Add offsets for magnetometer and gyroscope.
They can be use to represent online calibration to offset
hard iron or drift.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
---
Changes since v1:
- New, split from 3/3 patch.
Documentation/ABI/testing/sysfs-bus-iio | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 47df16c87862d..f77aee8886c66 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1716,3 +1716,22 @@ Description:
Mass concentration reading of particulate matter in ug / m3.
pmX consists of particles with aerodynamic diameter less or
equal to X micrometers.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_offset
+What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_offset
+What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_offset
+KernelVersion: x.y
+Contact: linux-iio@vger.kernel.org
+Description:
+ Gyroscope drift calculated by the sensor. In addition to factory
+ calibration, sensor or sensorhub can
+ detect gyroscope drift and report it to userspace.
+
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_offset
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_offset
+What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_offset
+KernelVersion: x.y
+Contact: linux-iio@vger.kernel.org
+Description:
+ Hard Iron bias calculated by the sensor or sensorhub. To be applied by
+ user space application to the raw data to obtain the geomagnetic field.
--
2.28.0.402.g5ffc5be6b7-goog