iio: core: Introduce IIO_CHAN_INFO_CALIBWEIGHT

Some devices need the weight of the user to compute other
parameters. One of this devices is Freescale's MMA9553L
(http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf)
that needs the weight of the user to compute the number of calories burnt.

Signed-off-by: Irina Tirdea <irina.tirdea@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 80b5efb..71dc8db 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -351,6 +351,13 @@ Description:
                to compute the stride length, distance, speed and activity
                type.
 
+What:          /sys/bus/iio/devices/iio:deviceX/in_energy_calibweight
+KernelVersion: 3.20
+Contact:       linux-iio@vger.kernel.org
+Description:
+               Weight of the user (in kg). It is needed by some pedometers
+               to compute the calories burnt by the user.
+
 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 18a8ab9..4ee6fdf 100644 (file)
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -125,6 +125,7 @@ static const char * const iio_chan_info_postfix[] = {
        [IIO_CHAN_INFO_INT_TIME] = "integration_time",
        [IIO_CHAN_INFO_ENABLE] = "en",
        [IIO_CHAN_INFO_CALIBHEIGHT] = "calibheight",
+       [IIO_CHAN_INFO_CALIBWEIGHT] = "calibweight",
 };
 
 /**

diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index 5902020..51f1643 100644 (file)
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -40,6 +40,7 @@ enum iio_chan_info_enum {
        IIO_CHAN_INFO_INT_TIME,
        IIO_CHAN_INFO_ENABLE,
        IIO_CHAN_INFO_CALIBHEIGHT,
+       IIO_CHAN_INFO_CALIBWEIGHT,
 };
 
 enum iio_shared_by {