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| author | Daniel Baluta <daniel.baluta@intel.com> | 2014-11-10 15:45:30 +0300 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2014-11-22 14:05:47 +0300 |
| commit | 55aebeb926b6f93a540328e7ac770ef536b09b77 (patch) | |
| tree | 2f672ff0a471b842d07af0e546547e16e2219ea0 /drivers/iio/industrialio-core.c | |
| parent | 356ae946f9945997213b19279bc2e84bb61cc26a (diff) | |
| download | linux-55aebeb926b6f93a540328e7ac770ef536b09b77.tar.xz | |
iio: core: Introduce IIO_ACTIVITY channel
This channel will be used for exposing information about
activity composite sensors. Activities supported so far:
* running
* jogging
* walking
* still
THRESHOLD event is used to signal a change in the activity
state.
We associate a confidence interval for each activity expressed
as a percentage from 0 to 100.
* 0, means the sensor IS NOT reporting that activity.
* 100, means the sensor IS reporting that activity.
Users of this interface have two possible means to gather
information about the ongoing activities.
1. Event based, via event file descriptor
* sensor may report an event when ENTERING an activity or LEAVING
an activity based on a threshold value.
* drivers will wake up applications waiting data on the event fd
2. Polling, by reading the sysfs associated attribute files:
* /sys/bus/iio/devices/iio:device0/in_activity_running_input
expressed as percentage confidence value from 0 to 100.
This will offer an interface for Android significant motion
composite sensor defined here:
http://source.android.com/devices/sensors/composite_sensors.html
Activities listed above are supported by Freescale's MMA9553 sensor:
http://freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/industrialio-core.c')
| -rw-r--r-- | drivers/iio/industrialio-core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index af3e76d652ba..e453ef9e0c36 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -70,6 +70,7 @@ static const char * const iio_chan_type_name_spec[] = { [IIO_CCT] = "cct", [IIO_PRESSURE] = "pressure", [IIO_HUMIDITYRELATIVE] = "humidityrelative", + [IIO_ACTIVITY] = "activity", }; static const char * const iio_modifier_names[] = { @@ -91,6 +92,10 @@ static const char * const iio_modifier_names[] = { [IIO_MOD_NORTH_TRUE] = "from_north_true", [IIO_MOD_NORTH_MAGN_TILT_COMP] = "from_north_magnetic_tilt_comp", [IIO_MOD_NORTH_TRUE_TILT_COMP] = "from_north_true_tilt_comp", + [IIO_MOD_RUNNING] = "running", + [IIO_MOD_JOGGING] = "jogging", + [IIO_MOD_WALKING] = "walking", + [IIO_MOD_STILL] = "still", }; /* relies on pairs of these shared then separate */ |