iio: core: Introduce IIO_CHAN_INFO_CALIBHEIGHT

Some devices need the height of the user to compute various
parameters. One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that needs the height of the user to compute the stride length which
is used further to determine distance, speed and activity type.

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>

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index c60b0a1af83974671ef5b05c12545b546b1602e1..4a9e29a3c2dc4d176131672eb1636b35df87bfae 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -323,6 +323,14 @@ Description:
                production inaccuracies).  If shared across all channels,
                <type>_calibscale is used.
 
+What:          /sys/bus/iio/devices/iio:deviceX/in_steps_calibheight
+KernelVersion: 3.19
+Contact:       linux-iio@vger.kernel.org
+Description:
+               Height of the user (in centimeters) used by some pedometers
+               to compute the stride length, distance, speed and activity
+               type.
+
 What:          /sys/bus/iio/devices/iio:deviceX/in_accel_scale_available
 What:          /sys/.../iio:deviceX/in_voltageX_scale_available
 What:          /sys/.../iio:deviceX/in_voltage-voltage_scale_available

diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 1e060f390b084f20a3b8e3ed1d0fbc9dd1705cff..45bb3a43afacdf157667219b9ccc5766da52efe3 100644 (file)
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -120,6 +120,7 @@ static const char * const iio_chan_info_postfix[] = {
        [IIO_CHAN_INFO_HYSTERESIS] = "hysteresis",
        [IIO_CHAN_INFO_INT_TIME] = "integration_time",
        [IIO_CHAN_INFO_ENABLE] = "en",
+       [IIO_CHAN_INFO_CALIBHEIGHT] = "calibheight",
 };
 
 /**

diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index f45a400a5e3ea1950787703a8f2289cf59a4f405..878d861b061059a5cbff99fcb0aea9904c611ed5 100644 (file)
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -39,6 +39,7 @@ enum iio_chan_info_enum {
        IIO_CHAN_INFO_HYSTERESIS,
        IIO_CHAN_INFO_INT_TIME,
        IIO_CHAN_INFO_ENABLE,
+       IIO_CHAN_INFO_CALIBHEIGHT,
 };
 
 enum iio_shared_by {