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authorMatt Ranostay <mranostay@gmail.com>2015-09-14 03:26:11 (GMT)
committerJonathan Cameron <jic23@kernel.org>2015-09-23 19:23:24 (GMT)
commit8ff6b3bc9493089247e012a9fcba7198e194b4a5 (patch)
treefb399ed1a3165504ee12bf438a5ecf23f45fcaee /Documentation/ABI/testing/sysfs-bus-iio
parent0df5a5488b6d157eabfdc0747c87c08bd7431a56 (diff)
downloadlinux-8ff6b3bc9493089247e012a9fcba7198e194b4a5.tar.xz
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>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-iio')
-rw-r--r--Documentation/ABI/testing/sysfs-bus-iio11
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 20312a0..08903b9 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.