iio: Added ABI description for quaternion

Added documentation for reading quaternion components for 3D rotations.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 58ba33300305..6b74691dc281 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -792,6 +792,7 @@ What:		/sys/.../iio:deviceX/scan_elements/in_incli_x_en
 What:           /sys/.../iio:deviceX/scan_elements/in_incli_y_en
 What:           /sys/.../iio:deviceX/scan_elements/in_pressureY_en
 What:           /sys/.../iio:deviceX/scan_elements/in_pressure_en
+What:           /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_en
 KernelVersion:  2.6.37
 Contact:        linux-iio@vger.kernel.org
 Description:
@@ -807,6 +808,7 @@ What:		/sys/.../iio:deviceX/scan_elements/in_voltageY_supply_type
 What:           /sys/.../iio:deviceX/scan_elements/in_timestamp_type
 What:           /sys/.../iio:deviceX/scan_elements/in_pressureY_type
 What:           /sys/.../iio:deviceX/scan_elements/in_pressure_type
+What:           /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_type
 KernelVersion:  2.6.37
 Contact:        linux-iio@vger.kernel.org
 Description:
@@ -853,6 +855,7 @@ What:		/sys/.../iio:deviceX/scan_elements/in_incli_y_index
 What:           /sys/.../iio:deviceX/scan_elements/in_timestamp_index
 What:           /sys/.../iio:deviceX/scan_elements/in_pressureY_index
 What:           /sys/.../iio:deviceX/scan_elements/in_pressure_index
+What:           /sys/.../iio:deviceX/scan_elements/in_rot_quaternion_index
 KernelVersion:  2.6.37
 Contact:        linux-iio@vger.kernel.org
 Description:
@@ -899,3 +902,12 @@ Contact:	linux-iio@vger.kernel.org
 Description:
                 This attribute is used to get/set the integration time in
                 seconds.
+
+What:           /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
+KernelVersion:  3.15
+Contact:        linux-iio@vger.kernel.org
+Description:
+                Raw value of quaternion components using a format
+                x y z w. Here x, y, and z component represents the axis about
+                which a rotation will occur and w component represents the
+                amount of rotation.