[RFC PATCH 3/8] iio: core: Introduce new MOTION event

[Daniel Baluta <daniel.baluta@intel.com>]

This is to be used by drivers to signal detection of motion. We also
add some possible values for motion as IIO events modifiers:
	* running
	* jogging
	* walking
	* still

These values are supported by Frescale's MMA9553 sensor:

http://freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf

Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
---
 Documentation/ABI/testing/sysfs-bus-iio | 7 +++++++
 drivers/iio/industrialio-core.c         | 4 ++++
 drivers/iio/industrialio-event.c        | 1 +
 include/linux/iio/types.h               | 7 ++++++-
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index d760b02..070346d 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -808,6 +808,13 @@ Description:
 		number or direction is not specified, applies to all channels of
 		this type.
 
+What:		/sys/.../events/in_activity_motion_either_en
+KernelVersion:	3.17
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Enables or disables motion detection. Each time motion is detected an
+		event of this type will be generated.
+
 What:		/sys/bus/iio/devices/iio:deviceX/trigger/current_trigger
 KernelVersion:	2.6.35
 Contact:	linux-iio@vger.kernel.org
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 67e8561..e453ef9 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -92,6 +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..eca5af2 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_MOTION] = "motion",
 };
 
 static const char * const iio_ev_dir_text[] = {
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index d58769a..003638d 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -60,7 +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 {
@@ -69,6 +73,7 @@ enum iio_event_type {
 	IIO_EV_TYPE_ROC,
 	IIO_EV_TYPE_THRESH_ADAPTIVE,
 	IIO_EV_TYPE_MAG_ADAPTIVE,
+	IIO_EV_TYPE_MOTION,
 };
 
 enum iio_event_info {
-- 
1.9.1