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Date: Thu, 9 Oct 2014 15:39:40 +0300
From: Daniel Baluta <daniel.baluta@...el.com>
To: jic23@...nel.org
Cc: irina.tirdea@...el.com, daniel.baluta@...el.com,
linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 2/7] iio: core: Introduce IIO_ACTIVITY channel and TRANSITION event
This channel will be used for exposing information about
activity composite sensors. Activities supported so far:
* running
* jogging
* walking
* still
TRANSITION 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 possibile 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@...el.com>
Signed-off-by: Daniel Baluta <daniel.baluta@...el.com>
---
Documentation/ABI/testing/sysfs-bus-iio | 44 +++++++++++++++++++++++++++++++++
drivers/iio/industrialio-core.c | 5 ++++
drivers/iio/industrialio-event.c | 1 +
include/linux/iio/types.h | 8 +++++-
4 files changed, 57 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index d760b02..12d0385 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -776,6 +776,40 @@ Description:
met before an event is generated. If direction is not
specified then this period applies to both directions.
+What: /sys/.../events/in_activity_still_transition_rising_en
+What: /sys/.../events/in_activity_still_transition_falling_en
+What: /sys/.../events/in_activity_walking_transition_rising_en
+What: /sys/.../events/in_activity_walking_transition_falling_en
+What: /sys/.../events/in_activity_jogging_transition_rising_en
+What: /sys/.../events/in_activity_jogging_transition_falling_en
+What: /sys/.../events/in_activity_running_transition_rising_en
+What: /sys/.../events/in_activity_running_transition_falling_en
+KernelVersion: 3.19
+Contact: linux-iio@...r.kernel.org
+Description:
+ Enables or disables activitity events. Depending on direction
+ an event is generated when sensor ENTERS or LEAVES a given state.
+
+What: /sys/.../events/in_activity_still_transition_rising_value
+What: /sys/.../events/in_activity_still_transition_falling_value
+What: /sys/.../events/in_activity_walking_transition_rising_value
+What: /sys/.../events/in_activity_walking_transition_falling_value
+What: /sys/.../events/in_activity_jogging_transition_rising_value
+What: /sys/.../events/in_activity_jogging_transition_falling_value
+What: /sys/.../events/in_activity_running_transition_rising_value
+What: /sys/.../events/in_activity_running_transition_falling_value
+KernelVersion: 3.19
+Contact: linux-iio@...r.kernel.org
+Description:
+ Confidence value (in units as percentage) to be used
+ for deciding when an event should be generated. E.g for
+ running: If the confidence value reported by the sensor
+ is greater then in_activity_running_transition_rising_value
+ then the sensor ENTERS running state. Conversely, if the
+ confidence value reported by the sensor is lower than
+ in_activity_running_transition_rising_value then the sensor
+ is LEAVING running state.
+
What: /sys/.../iio:deviceX/events/in_accel_mag_en
What: /sys/.../iio:deviceX/events/in_accel_mag_rising_en
What: /sys/.../iio:deviceX/events/in_accel_mag_falling_en
@@ -942,6 +976,16 @@ Description:
and the relevant _type attributes to establish the data storage
format.
+What: /sys/.../iio:deviceX/in_activity_still_input
+What: /sys/.../iio:deviceX/in_activity_walking_input
+What: /sys/.../iio:deviceX/in_activity_jogging_input
+What: /sys/.../iio:deviceX/in_activity_running_input
+KernelVersion: 3.19
+Contact: linux-iio@...r.kernel.org
+Description:
+ This attribute is used to read the confidence for an activity
+ expressed in units as percentage.
+
What: /sys/.../iio:deviceX/in_anglvel_z_quadrature_correction_raw
KernelVersion: 2.6.38
Contact: linux-iio@...r.kernel.org
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index af3e76d..e453ef9 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 */
diff --git a/drivers/iio/industrialio-event.c b/drivers/iio/industrialio-event.c
index 0c1e37e..afcf154 100644
--- a/drivers/iio/industrialio-event.c
+++ b/drivers/iio/industrialio-event.c
@@ -197,6 +197,7 @@ static const char * const iio_ev_type_text[] = {
[IIO_EV_TYPE_ROC] = "roc",
[IIO_EV_TYPE_THRESH_ADAPTIVE] = "thresh_adaptive",
[IIO_EV_TYPE_MAG_ADAPTIVE] = "mag_adaptive",
+ [IIO_EV_TYPE_TRANSITION] = "transition",
};
static const char * const iio_ev_dir_text[] = {
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 4a2af8a..a08ee6c 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -30,6 +30,7 @@ enum iio_chan_type {
IIO_CCT,
IIO_PRESSURE,
IIO_HUMIDITYRELATIVE,
+ IIO_ACTIVITY,
};
enum iio_modifier {
@@ -59,7 +60,11 @@ enum iio_modifier {
IIO_MOD_NORTH_MAGN,
IIO_MOD_NORTH_TRUE,
IIO_MOD_NORTH_MAGN_TILT_COMP,
- IIO_MOD_NORTH_TRUE_TILT_COMP
+ IIO_MOD_NORTH_TRUE_TILT_COMP,
+ IIO_MOD_RUNNING,
+ IIO_MOD_JOGGING,
+ IIO_MOD_WALKING,
+ IIO_MOD_STILL,
};
enum iio_event_type {
@@ -68,6 +73,7 @@ enum iio_event_type {
IIO_EV_TYPE_ROC,
IIO_EV_TYPE_THRESH_ADAPTIVE,
IIO_EV_TYPE_MAG_ADAPTIVE,
+ IIO_EV_TYPE_TRANSITION,
};
enum iio_event_info {
--
1.9.1
--
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