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| author | Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com> | 2015-03-30 10:34:58 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-04-09 16:03:05 +0200 |
| commit | c8a8585431efba0faaf41167f8f7c27c48307ca6 (patch) | |
| tree | f2813a14517319b9c27851b2e8ffcf168ae2d3cd /Documentation/ABI | |
| parent | iio: accel: kxcjk1013: allow using an external trigger (diff) | |
| download | linux-c8a8585431efba0faaf41167f8f7c27c48307ca6.tar.xz linux-c8a8585431efba0faaf41167f8f7c27c48307ca6.zip | |
iio: core: Introduce IIO_CHAN_INFO_CALIBEMISSIVITY
Contact-less IR temperature sensors measure the temperature of an object
by using its thermal radiation. Surfaces with different emissivity
ratios emit different amounts of energy at the same temperature.
IIO_CHAN_INFO_CALIBEMISSIVITY allows the user to inform the sensor of the
emissivity of the object in front of it, in order to effectively measure
its temperature.
A device providing such setting is Melexis's MLX90614:
http://melexis.com/Assets/IR-sensor-thermometer-MLX90614-Datasheet-5152.aspx.
Signed-off-by: Vianney le Clément de Saint-Marcq <vianney.leclement@essensium.com>
Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 3befcb19f414..866b4ec4aab6 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -1364,3 +1364,14 @@ Description: hwfifo_watermak_min but not equal to any of the values in this list, the driver will chose an appropriate value for the hardware fifo watermark level. + +What: /sys/bus/iio/devices/iio:deviceX/in_temp_calibemissivity +What: /sys/bus/iio/devices/iio:deviceX/in_tempX_calibemissivity +What: /sys/bus/iio/devices/iio:deviceX/in_temp_object_calibemissivity +What: /sys/bus/iio/devices/iio:deviceX/in_tempX_object_calibemissivity +KernelVersion: 4.1 +Contact: linux-iio@vger.kernel.org +Description: + The emissivity ratio of the surface in the field of view of the + contactless temperature sensor. Emissivity varies from 0 to 1, + with 1 being the emissivity of a black body. |