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| author | Irina Tirdea <irina.tirdea@intel.com> | 2015-01-11 22:10:09 +0300 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-01-27 21:49:54 +0300 |
| commit | 5a1a932981415661827f7edd9e99943a2a3b7b67 (patch) | |
| tree | 3e08a87f80e1fa5dd60f543cd28d2244428182e5 | |
| parent | cc3c9eecaed65b26ee0661e9e9491fd8d48e3907 (diff) | |
| download | linux-5a1a932981415661827f7edd9e99943a2a3b7b67.tar.xz | |
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: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 10 | ||||
| -rw-r--r-- | drivers/iio/industrialio-core.c | 2 | ||||
| -rw-r--r-- | include/linux/iio/types.h | 2 |
3 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index c627a9a1cd56..80b5efb1cdbf 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -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. diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 655755b49ccd..18a8ab911aab 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -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 */ diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h index a7de445222f4..c3601c2c0a9d 100644 --- a/include/linux/iio/types.h +++ b/include/linux/iio/types.h @@ -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 { |