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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 Original line 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_pressureY_scale

What:		/sys/bus/iio/devices/iio:deviceX/in_pressure_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_humidityrelative_scale

What:		/sys/bus/iio/devices/iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_scale

KernelVersion:	2.6.35

KernelVersion:	2.6.35

Contact:	linux-iio@vger.kernel.org

Contact:	linux-iio@vger.kernel.org

Description:

Description:
@@ -1164,3 +1165,12 @@ Contact: linux-iio@vger.kernel.org 
Description:

Description:

		This attribute is used to read the number of steps taken by the user

		This attribute is used to read the number of steps taken by the user

		since the last reboot while activated.

		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 Original line Diff line number Diff line
@@ -74,6 +74,7 @@ static const char * const iio_chan_type_name_spec[] = { 
	[IIO_STEPS] = "steps",

	[IIO_STEPS] = "steps",

	[IIO_ENERGY] = "energy",

	[IIO_ENERGY] = "energy",

	[IIO_DISTANCE] = "distance",

	[IIO_DISTANCE] = "distance",

	[IIO_VELOCITY] = "velocity",

};

};





static const char * const iio_modifier_names[] = {

static const char * const iio_modifier_names[] = {
@@ -99,6 +100,7 @@ static const char * const iio_modifier_names[] = { 
	[IIO_MOD_JOGGING] = "jogging",

	[IIO_MOD_JOGGING] = "jogging",

	[IIO_MOD_WALKING] = "walking",

	[IIO_MOD_WALKING] = "walking",

	[IIO_MOD_STILL] = "still",

	[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 */

/* relies on pairs of these shared then separate */

include/linux/iio/types.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -34,6 +34,7 @@ enum iio_chan_type { 
	IIO_STEPS,

	IIO_STEPS,

	IIO_ENERGY,

	IIO_ENERGY,

	IIO_DISTANCE,

	IIO_DISTANCE,

	IIO_VELOCITY,

};

};





enum iio_modifier {

enum iio_modifier {
@@ -68,6 +69,7 @@ enum iio_modifier { 
	IIO_MOD_JOGGING,

	IIO_MOD_JOGGING,

	IIO_MOD_WALKING,

	IIO_MOD_WALKING,

	IIO_MOD_STILL,

	IIO_MOD_STILL,

	IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,

};

};





enum iio_event_type {

enum iio_event_type {