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Commit 5a1a9329 authored by Irina Tirdea's avatar Irina Tirdea Committed by Jonathan Cameron
Browse files

iio: core: Introduce IIO_VELOCITY and IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z 

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: default avatarIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent cc3c9eec

Documentation/ABI/testing/sysfs-bus-iio

+10 −0
Original line number Diff line number Diff line
@@ -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.

drivers/iio/industrialio-core.c

+2 −0
Original line number Diff line number Diff line
@@ -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 */

include/linux/iio/types.h

+2 −0
Original line number Diff line number Diff line
@@ -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 {