iio: Add channel for Position Relative
Add new channel type for relative position on a pad.
These type of analog sensor offers the position of a pen
on a touchpad, and is represented as a voltage, which can be
converted to a position on X and Y axis on the pad.
The channel will hand the relative position on the pad in both directions.
The channel can then be consumed by a touchscreen driver or
read as-is for a raw indication of the touchpen on a touchpad.
Signed-off-by: Eugen Hristev <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 731146c..c735303 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -197,6 +197,18 @@
Angle of rotation. Units after application of scale and offset
are radians.
+What: /sys/bus/iio/devices/iio:deviceX/in_positionrelative_x_raw
+What: /sys/bus/iio/devices/iio:deviceX/in_positionrelative_y_raw
+KernelVersion: 4.18
+Contact: [email protected]
+Description:
+ Relative position in direction x or y on a pad (may be
+ arbitrarily assigned but should match other such assignments on
+ device).
+ Units after application of scale and offset are milli percents
+ from the pad's size in both directions. Should be calibrated by
+ the consumer.
+
What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_x_raw
What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_raw
What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_raw
