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iio: document pitch, yaw, roll modifiers 

Introduce ABI documentation for new modifiers used for reporting rotations
expressed as euler angles (i.e. yaw, pitch, roll).

It looks like we have some unit inconsistency along various IIO modifiers:
it seems that incli is in deg, angl is in radians and rot isn't documented,
but at least the adis16209 driver has rot in deg.

Here we use deg (so angl is the only one using radians).

Signed-off-by: Andrea Merello <andrea.merello@iit.it>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220907132205.28021-6-andrea.merello@iit.it
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Andrea Merello 2022-09-07 15:21:56 +02:00 committed by Jonathan Cameron
parent dcedf14553
commit 246d178c78
1 changed files with 9 additions and 0 deletions
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9
Documentation/ABI/testing/sysfs-bus-iio
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@ -2146,3 +2146,12 @@ Contact: linux-iio@vger.kernel.org
Description:
Lists all available time values between upper peak to lower
peak. Units in seconds.
What: /sys/bus/iio/devices/iio:deviceX/in_rot_yaw_raw
What: /sys/bus/iio/devices/iio:deviceX/in_rot_pitch_raw
What: /sys/bus/iio/devices/iio:deviceX/in_rot_roll_raw
KernelVersion: 6.1
Contact: linux-iio@vger.kernel.org
Description:
Raw (unscaled) euler angles readings. Units after
application of scale are deg.