On 30/03/15 09:34, Vianney le Clément de Saint-Marcq wrote: > 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@xxxxxxxxxxxxx> > Cc: Arnout Vandecappelle (Essensium/Mind) <arnout@xxxxxxx> > Applied to the togreg branch of iio.git - initially pushed out as testing... Jonathan > --- > > v3: rename EMISSIVITY to CALIBEMISSIVITY > v2: new patch > --- > Documentation/ABI/testing/sysfs-bus-iio | 11 +++++++++++ > drivers/iio/industrialio-core.c | 1 + > include/linux/iio/iio.h | 1 + > 3 files changed, 13 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio > index 103dd9b..cf67f63 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@xxxxxxxxxxxxxxx > +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. > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c > index aaba9d3..e3730be 100644 > --- a/drivers/iio/industrialio-core.c > +++ b/drivers/iio/industrialio-core.c > @@ -128,6 +128,7 @@ static const char * const iio_chan_info_postfix[] = { > [IIO_CHAN_INFO_CALIBWEIGHT] = "calibweight", > [IIO_CHAN_INFO_DEBOUNCE_COUNT] = "debounce_count", > [IIO_CHAN_INFO_DEBOUNCE_TIME] = "debounce_time", > + [IIO_CHAN_INFO_CALIBEMISSIVITY] = "calibemissivity", > }; > > /** > diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h > index d86b753..b1e46ae 100644 > --- a/include/linux/iio/iio.h > +++ b/include/linux/iio/iio.h > @@ -43,6 +43,7 @@ enum iio_chan_info_enum { > IIO_CHAN_INFO_CALIBWEIGHT, > IIO_CHAN_INFO_DEBOUNCE_COUNT, > IIO_CHAN_INFO_DEBOUNCE_TIME, > + IIO_CHAN_INFO_CALIBEMISSIVITY, > }; > > enum iio_shared_by { > -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
