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iio: Add IIO_DELTA_VELOCITY channel type

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The delta velocity is defined as a piece-wise integration of
acceleration data. The delta velocity represents the linear velocity
change between two consecutive measurements and it
is measured in m / s (meters per second).

In order to track the total linear velocity change during a desired
period of time, simply sum-up the delta velocity 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/20230808075059.645525-3-ramona.bolboaca@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Ramona Bolboaca 2023-08-08 10:50:58 +03:00 committed by Jonathan Cameron
parent 744f4990ee
commit 94a39f2c44
4 changed files with 27 additions and 0 deletions
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23
Documentation/ABI/testing/sysfs-bus-iio
View file

@ -293,6 +293,21 @@ Description:
angle samples acquired during that time.
Units after application of scale and offset are radians.
What: /sys/bus/iio/devices/iio:deviceX/in_deltavelocity_x_raw
What: /sys/bus/iio/devices/iio:deviceX/in_deltavelocity_y_raw
What: /sys/bus/iio/devices/iio:deviceX/in_deltavelocity_z_raw
KernelVersion: 6.5
Contact: linux-iio@vger.kernel.org
Description:
The linear velocity change 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 linear velocity change during a
desired period of time, the application should sum-up the delta
velocity samples acquired during that time.
Units after application of scale and offset are meters per
second.
What: /sys/bus/iio/devices/iio:deviceX/in_angl_raw
What: /sys/bus/iio/devices/iio:deviceX/in_anglY_raw
KernelVersion: 4.17
@ -476,6 +491,7 @@ 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_deltavelocity_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
@ -1350,6 +1366,9 @@ 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_deltavelocity_x_en
What: /sys/.../iio:deviceX/bufferY/in_deltavelocity_y_en
What: /sys/.../iio:deviceX/bufferY/in_deltavelocity_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
@ -1381,6 +1400,7 @@ Description:
What: /sys/.../iio:deviceX/bufferY/in_accel_type
What: /sys/.../iio:deviceX/bufferY/in_deltaangl_type
What: /sys/.../iio:deviceX/bufferY/in_deltavelocity_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
@ -1438,6 +1458,9 @@ 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_deltavelocity_x_index
What: /sys/.../iio:deviceX/bufferY/in_deltavelocity_y_index
What: /sys/.../iio:deviceX/bufferY/in_deltavelocity_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

@ -91,6 +91,7 @@ static const char * const iio_chan_type_name_spec[] = {
[IIO_PHASE] = "phase",
[IIO_MASSCONCENTRATION] = "massconcentration",
[IIO_DELTA_ANGL] = "deltaangl",
[IIO_DELTA_VELOCITY] = "deltavelocity",
};
static const char * const iio_modifier_names[] = {

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

@ -48,6 +48,7 @@ enum iio_chan_type {
IIO_PHASE,
IIO_MASSCONCENTRATION,
IIO_DELTA_ANGL,
IIO_DELTA_VELOCITY,
};
enum iio_modifier {

2
tools/iio/iio_event_monitor.c
View file

@ -60,6 +60,7 @@ static const char * const iio_chan_type_name_spec[] = {
[IIO_PHASE] = "phase",
[IIO_MASSCONCENTRATION] = "massconcentration",
[IIO_DELTA_ANGL] = "deltaangl",
[IIO_DELTA_VELOCITY] = "deltavelocity",
};
static const char * const iio_ev_type_text[] = {
@ -175,6 +176,7 @@ static bool event_is_known(struct iio_event_data *event)
case IIO_PHASE:
case IIO_MASSCONCENTRATION:
case IIO_DELTA_ANGL:
case IIO_DELTA_VELOCITY:
break;
default:
return false;