[PATCH 1/4] iio: chemical: add particle number concentration channel type

[Tomasz Duszynski <tduszyns@gmail.com>]

This patch adds channel type for expressing particle number
concentration.

Signed-off-by: Tomasz Duszynski <tduszyns@gmail.com>
---
 Documentation/ABI/testing/sysfs-bus-iio | 7 +++++++
 drivers/iio/industrialio-core.c         | 1 +
 include/uapi/linux/iio/types.h          | 1 +
 3 files changed, 9 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 530809ccfacf..481771e585ee 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1608,3 +1608,10 @@ Description:
 		provides an absolute positional reference (e.g. a pulse once per
 		revolution) which may be used to home positional systems as
 		required.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_numberconcentration_input
+KernelVersion: 	4.12
+Contact:	linux-iio@vger.kernel.org
+Description:
+		Reading of particulates number in a volume of a mixture.
+		Unit is in 1/m3.
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index d18ded45bedd..451e3bb8d623 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -85,6 +85,7 @@ static const char * const iio_chan_type_name_spec[] = {
 	[IIO_COUNT] = "count",
 	[IIO_INDEX] = "index",
 	[IIO_GRAVITY]  = "gravity",
+	[IIO_NUMBERCONCENTRATION] = "numberconcentration",
 };
 
 static const char * const iio_modifier_names[] = {
diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
index ffafd6c25a48..52696e251c4d 100644
--- a/include/uapi/linux/iio/types.h
+++ b/include/uapi/linux/iio/types.h
@@ -43,6 +43,7 @@ enum iio_chan_type {
 	IIO_COUNT,
 	IIO_INDEX,
 	IIO_GRAVITY,
+	IIO_NUMBERCONCENTRATION,
 };
 
 enum iio_modifier {
-- 
2.11.1