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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>
hifive-unleashed-5.1
Irina Tirdea 2014-11-10 14:45:33 +02:00 committed by Jonathan Cameron
parent a88bfe7858
commit bcdf28fb1b
3 changed files with 10 additions and 0 deletions
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8
Documentation/ABI/testing/sysfs-bus-iio
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@ -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

1
drivers/iio/industrialio-core.c
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@ -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",
};
/**

1
include/linux/iio/iio.h
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@ -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 {