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iio: core: Introduce IIO_VELOCITY and IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z

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Some devices export the current speed value of the user.

One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that computes the speed of the user based on the number of steps and
stride length.

Introduce a new channel type VELOCITY and a modifier for the magniture or
norm of the velocity vector, IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Irina Tirdea 2015-01-11 21:10:09 +02:00 committed by Jonathan Cameron
parent cc3c9eecae
commit 5a1a932981
3 changed files with 14 additions and 0 deletions
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10
Documentation/ABI/testing/sysfs-bus-iio
View File

@ -295,6 +295,7 @@ What: /sys/bus/iio/devices/iio:deviceX/in_rot_from_north_true_tilt_comp_scale
What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale
What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale
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
KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org
Description:
@ -1164,3 +1165,12 @@ Contact: linux-iio@vger.kernel.org
Description:
This attribute is used to read the number of steps taken by the user
since the last reboot while activated.
What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_input
What: /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_raw
KernelVersion: 3.19
Contact: linux-iio@vger.kernel.org
Description:
This attribute is used to read the current speed value of the
user (which is the norm or magnitude of the velocity vector).
Units after application of scale are m/s.

2
drivers/iio/industrialio-core.c
View File

@ -74,6 +74,7 @@ static const char * const iio_chan_type_name_spec[] = {
[IIO_STEPS] = "steps",
[IIO_ENERGY] = "energy",
[IIO_DISTANCE] = "distance",
[IIO_VELOCITY] = "velocity",
};
static const char * const iio_modifier_names[] = {
@ -99,6 +100,7 @@ static const char * const iio_modifier_names[] = {
[IIO_MOD_JOGGING] = "jogging",
[IIO_MOD_WALKING] = "walking",
[IIO_MOD_STILL] = "still",
[IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)",
};
/* relies on pairs of these shared then separate */

2
include/linux/iio/types.h
View File

@ -34,6 +34,7 @@ enum iio_chan_type {
IIO_STEPS,
IIO_ENERGY,
IIO_DISTANCE,
IIO_VELOCITY,
};
enum iio_modifier {
@ -68,6 +69,7 @@ enum iio_modifier {
IIO_MOD_JOGGING,
IIO_MOD_WALKING,
IIO_MOD_STILL,
IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
};
enum iio_event_type {