On 14/09/15 04:26, Matt Ranostay wrote: > There are air quality sensors that report data back in parts per million > of VOC (Volatile Organic Compounds) which are usually indexed from CO2 > or another common pollutant. > > This patchset adds an IIO_CONCENTRATION type that returns a percentage > of substance because no other channels types fit this use case. > Modifiers for IIO_MOD_CO2 and IIO_MOD_VOC gas types are defined. > > Signed-off-by: Matt Ranostay <mranostay@xxxxxxxxx> Applied to the togreg branch of iio.git - initially pushed out as testing for the autobuilders to play with it. Thanks, Jonathan > --- > Documentation/ABI/testing/sysfs-bus-iio | 11 +++++++++++ > drivers/iio/industrialio-core.c | 3 +++ > include/uapi/linux/iio/types.h | 3 +++ > 3 files changed, 17 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio > index 42d360f..682c070 100644 > --- a/Documentation/ABI/testing/sysfs-bus-iio > +++ b/Documentation/ABI/testing/sysfs-bus-iio > @@ -1459,3 +1459,14 @@ Description: > measurements and return the average value as output data. Each > value resulted from <type>[_name]_oversampling_ratio measurements > is considered as one sample for <type>[_name]_sampling_frequency. > + > +What: /sys/bus/iio/devices/iio:deviceX/in_concentration_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_concentration_co2_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_co2_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_concentration_voc_raw > +What: /sys/bus/iio/devices/iio:deviceX/in_concentrationX_voc_raw > +KernelVersion: 4.3 > +Contact: linux-iio@xxxxxxxxxxxxxxx > +Description: > + Raw (unscaled no offset etc.) percentage reading of a substance. > diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c > index b3fcc2c..8eb6064 100644 > --- a/drivers/iio/industrialio-core.c > +++ b/drivers/iio/industrialio-core.c > @@ -75,6 +75,7 @@ static const char * const iio_chan_type_name_spec[] = { > [IIO_ENERGY] = "energy", > [IIO_DISTANCE] = "distance", > [IIO_VELOCITY] = "velocity", > + [IIO_CONCENTRATION] = "concentration", > }; > > static const char * const iio_modifier_names[] = { > @@ -111,6 +112,8 @@ static const char * const iio_modifier_names[] = { > [IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z] = "sqrt(x^2+y^2+z^2)", > [IIO_MOD_I] = "i", > [IIO_MOD_Q] = "q", > + [IIO_MOD_CO2] = "co2", > + [IIO_MOD_VOC] = "voc", > }; > > /* relies on pairs of these shared then separate */ > diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h > index 2f8b117..1e4c4e3 100644 > --- a/include/uapi/linux/iio/types.h > +++ b/include/uapi/linux/iio/types.h > @@ -35,6 +35,7 @@ enum iio_chan_type { > IIO_ENERGY, > IIO_DISTANCE, > IIO_VELOCITY, > + IIO_CONCENTRATION, > }; > > enum iio_modifier { > @@ -72,6 +73,8 @@ enum iio_modifier { > IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z, > IIO_MOD_I, > IIO_MOD_Q, > + IIO_MOD_CO2, > + IIO_MOD_VOC, > }; > > enum iio_event_type { > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html