iio: add driver for Freescale MMA9553

Add support for Freescale MMA9553L Intelligent Pedometer Platform.

The following functionalities are supported:
 - step counter (counts the number of steps using a HW register)
 - step detector (generates an iio event at every step the user takes)
 - activity recognition (rest, walking, jogging, running)
 - speed
 - calories
 - distance

To get accurate pedometer results, the user's height, weight and gender
need to be configured.

The specifications can be downloaded from:
http://www.freescale.com/files/sensors/doc/ref_manual/MMA955xLSWRM.pdf
http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 45 insertions, 4 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 588620ef2101..9a70c31619ea 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -343,7 +343,30 @@ Description:
                 production inaccuracies).  If shared across all channels,
                 <type>_calibscale is used.
 
-What:           /sys/bus/iio/devices/iio:deviceX/in_steps_calibheight
+What:           /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender
+What:           /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender
+What:           /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender
+What:           /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender
+KernelVersion:  3.20
+Contact:        linux-iio@vger.kernel.org
+Description:
+                Gender of the user (e.g.: male, female) used by some pedometers
+                to compute the stride length, distance, speed and activity
+                type.
+
+What:           /sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available
+What:           /sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available
+What:           /sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available
+What:           /sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available
+KernelVersion:  3.20
+Contact:        linux-iio@vger.kernel.org
+Description:
+                Lists all available gender values (e.g.: male, female).
+
+What:           /sys/bus/iio/devices/iio:deviceX/in_activity_calibheight
+What:           /sys/bus/iio/devices/iio:deviceX/in_energy_calibheight
+What:           /sys/bus/iio/devices/iio:deviceX/in_distance_calibheight
+What:           /sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight
 KernelVersion:  3.19
 Contact:        linux-iio@vger.kernel.org
 Description:
@@ -818,6 +841,14 @@ What:		/sys/.../events/in_tempY_roc_falling_period
 What:           /sys/.../events/in_accel_x&y&z_mag_falling_period
 What:           /sys/.../events/in_intensity0_thresh_period
 What:           /sys/.../events/in_proximity0_thresh_period
+What:           /sys/.../events/in_activity_still_thresh_rising_period
+What:           /sys/.../events/in_activity_still_thresh_falling_period
+What:           /sys/.../events/in_activity_walking_thresh_rising_period
+What:           /sys/.../events/in_activity_walking_thresh_falling_period
+What:           /sys/.../events/in_activity_jogging_thresh_rising_period
+What:           /sys/.../events/in_activity_jogging_thresh_falling_period
+What:           /sys/.../events/in_activity_running_thresh_rising_period
+What:           /sys/.../events/in_activity_running_thresh_falling_period
 KernelVersion:  2.6.37
 Contact:        linux-iio@vger.kernel.org
 Description:
@@ -1142,6 +1173,12 @@ Description:
                 This attribute is used to get/set the integration time in
                 seconds.
 
+What:           /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time
+KernelVersion:  3.20
+Contact:        linux-iio@vger.kernel.org
+Description:
+                Number of seconds in which to compute speed.
+
 What:           /sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw
 KernelVersion:  3.15
 Contact:        linux-iio@vger.kernel.org
@@ -1170,13 +1207,17 @@ Description:
                 present, output should be considered as processed with the
                 unit in milliamps.
 
+What:           /sys/.../iio:deviceX/in_energy_en
+What:           /sys/.../iio:deviceX/in_distance_en
+What:           /sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en
 What:           /sys/.../iio:deviceX/in_steps_en
 KernelVersion:  3.19
 Contact:        linux-iio@vger.kernel.org
 Description:
-                Activates the step counter. After activation, the number of steps
-                taken by the user will be counted in hardware and exported through
-                in_steps_input.
+                Activates a device feature that runs in firmware/hardware.
+                E.g. for steps: the pedometer saves power while not used;
+                when activated, it will count the steps taken by the user in
+                firmware and export them through in_steps_input.
 
 What:           /sys/.../iio:deviceX/in_steps_input
 KernelVersion:  3.19