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iio: Add IIO_DELTA_ANGL channel type

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The delta angle is defined as a piece-wise integration of angular
velocity data. The delta angle represents the amount of
angular displacement between two consecutive measurements and it
is measured in radians.

In order to track the total angular displacement during a desired
period of time, simply sum-up the delta angle samples acquired
during that time.

IIO currently does not offer a suitable channel type for this
type of measurements hence this patch adds it.

Signed-off-by: Ramona Bolboaca <ramona.bolboaca@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20230808075059.645525-2-ramona.bolboaca@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Ramona Bolboaca
2023-08-08 10:50:57 +03:00
committed by Jonathan Cameron
parent 8c337436e6
commit 744f4990ee
4 changed files with 26 additions and 0 deletions
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22
Documentation/ABI/testing/sysfs-bus-iio
View File

@@ -279,6 +279,20 @@ Description:
but should match other such assignments on device).
Units after application of scale and offset are m/s^2.
What: /sys/bus/iio/devices/iio:deviceX/in_deltaangl_x_raw
What: /sys/bus/iio/devices/iio:deviceX/in_deltaangl_y_raw
What: /sys/bus/iio/devices/iio:deviceX/in_deltaangl_z_raw
KernelVersion: 6.5
Contact: linux-iio@vger.kernel.org
Description:
Angular displacement between two consecutive samples on x, y or
z (may be arbitrarily assigned but should match other such
assignments on device).
In order to compute the total angular displacement during a
desired period of time, the application should sum-up the delta
angle samples acquired during that time.
Units after application of scale and offset are radians.
What: /sys/bus/iio/devices/iio:deviceX/in_angl_raw
What: /sys/bus/iio/devices/iio:deviceX/in_anglY_raw
KernelVersion: 4.17
@@ -461,6 +475,7 @@ What: /sys/bus/iio/devices/iio:deviceX/in_humidityrelative_scale
What: /sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale
What: /sys/bus/iio/devices/iio:deviceX/in_illuminance_scale
What: /sys/bus/iio/devices/iio:deviceX/in_countY_scale
What: /sys/bus/iio/devices/iio:deviceX/in_deltaangl_scale
What: /sys/bus/iio/devices/iio:deviceX/in_angl_scale
What: /sys/bus/iio/devices/iio:deviceX/in_intensity_x_scale
What: /sys/bus/iio/devices/iio:deviceX/in_intensity_y_scale
@@ -1332,6 +1347,9 @@ Description:
What: /sys/.../iio:deviceX/bufferY/in_accel_x_en
What: /sys/.../iio:deviceX/bufferY/in_accel_y_en
What: /sys/.../iio:deviceX/bufferY/in_accel_z_en
What: /sys/.../iio:deviceX/bufferY/in_deltaangl_x_en
What: /sys/.../iio:deviceX/bufferY/in_deltaangl_y_en
What: /sys/.../iio:deviceX/bufferY/in_deltaangl_z_en
What: /sys/.../iio:deviceX/bufferY/in_anglvel_x_en
What: /sys/.../iio:deviceX/bufferY/in_anglvel_y_en
What: /sys/.../iio:deviceX/bufferY/in_anglvel_z_en
@@ -1362,6 +1380,7 @@ Description:
Scan element control for triggered data capture.
What: /sys/.../iio:deviceX/bufferY/in_accel_type
What: /sys/.../iio:deviceX/bufferY/in_deltaangl_type
What: /sys/.../iio:deviceX/bufferY/in_anglvel_type
What: /sys/.../iio:deviceX/bufferY/in_magn_type
What: /sys/.../iio:deviceX/bufferY/in_incli_type
@@ -1416,6 +1435,9 @@ What: /sys/.../iio:deviceX/bufferY/in_voltage_q_index
What: /sys/.../iio:deviceX/bufferY/in_accel_x_index
What: /sys/.../iio:deviceX/bufferY/in_accel_y_index
What: /sys/.../iio:deviceX/bufferY/in_accel_z_index
What: /sys/.../iio:deviceX/bufferY/in_deltaangl_x_index
What: /sys/.../iio:deviceX/bufferY/in_deltaangl_y_index
What: /sys/.../iio:deviceX/bufferY/in_deltaangl_z_index
What: /sys/.../iio:deviceX/bufferY/in_anglvel_x_index
What: /sys/.../iio:deviceX/bufferY/in_anglvel_y_index
What: /sys/.../iio:deviceX/bufferY/in_anglvel_z_index

1
drivers/iio/industrialio-core.c
View File

@@ -90,6 +90,7 @@ static const char * const iio_chan_type_name_spec[] = {
[IIO_POSITIONRELATIVE] = "positionrelative",
[IIO_PHASE] = "phase",
[IIO_MASSCONCENTRATION] = "massconcentration",
[IIO_DELTA_ANGL] = "deltaangl",
};
static const char * const iio_modifier_names[] = {

1
include/uapi/linux/iio/types.h
View File

@@ -47,6 +47,7 @@ enum iio_chan_type {
IIO_POSITIONRELATIVE,
IIO_PHASE,
IIO_MASSCONCENTRATION,
IIO_DELTA_ANGL,
};
enum iio_modifier {

2
tools/iio/iio_event_monitor.c
View File

@@ -59,6 +59,7 @@ static const char * const iio_chan_type_name_spec[] = {
[IIO_POSITIONRELATIVE] = "positionrelative",
[IIO_PHASE] = "phase",
[IIO_MASSCONCENTRATION] = "massconcentration",
[IIO_DELTA_ANGL] = "deltaangl",
};
static const char * const iio_ev_type_text[] = {
@@ -173,6 +174,7 @@ static bool event_is_known(struct iio_event_data *event)
case IIO_POSITIONRELATIVE:
case IIO_PHASE:
case IIO_MASSCONCENTRATION:
case IIO_DELTA_ANGL:
break;
default:
return false;