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| author | Matt Ranostay <mranostay@gmail.com> | 2015-09-13 20:26:11 -0700 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-09-23 20:23:24 +0100 |
| commit | 8ff6b3bc9493089247e012a9fcba7198e194b4a5 (patch) | |
| tree | fb399ed1a3165504ee12bf438a5ecf23f45fcaee | |
| parent | 0df5a5488b6d157eabfdc0747c87c08bd7431a56 (diff) | |
| download | linux-8ff6b3bc9493089247e012a9fcba7198e194b4a5.tar.bz2 | |
iio: chemical: Add IIO_CONCENTRATION channel type
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@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-iio | 11 | ||||
| -rw-r--r-- | drivers/iio/industrialio-core.c | 3 | ||||
| -rw-r--r-- | include/uapi/linux/iio/types.h | 3 |
3 files changed, 17 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio index 20312a0e8197..08903b940957 100644 --- a/Documentation/ABI/testing/sysfs-bus-iio +++ b/Documentation/ABI/testing/sysfs-bus-iio @@ -1460,3 +1460,14 @@ 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@vger.kernel.org +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 bef690ed0480..ee09a945a2c7 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 2f8b11722204..1e4c4e346ffb 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 { |