[PATCH v3 1/2] iio: Add support for humidity sensors

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There are already humidity sensors in the hwmon subsystem,
so we use their unit (milli percent) here as well.

Signed-off-by: Harald Geyer <harald@xxxxxxxxx>
---

No changes since v2 except for
KernelVersion: 3.14

No changes since v1.

 Documentation/ABI/testing/sysfs-bus-iio |   13 +++++++++++++
 drivers/iio/industrialio-core.c         |    1 +
 include/linux/iio/types.h               |    1 +
 3 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index b20e829..25aebeb 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -197,6 +197,19 @@ Description:
 		Raw pressure measurement from channel Y. Units after
 		application of scale and offset are kilopascal.
 
+What:		/sys/bus/iio/devices/iio:deviceX/in_humidityrelative_raw
+KernelVersion:	3.14
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Raw humidity measurement of air. Units after application of
+		scale and offset are milli percent.
+
+What:		/sys/bus/iio/devices/iio:deviceX/in_humidityrelative_input
+KernelVersion:	3.14
+Contact:	linux-iio@xxxxxxxxxxxxxxx
+Description:
+		Scaled humidity measurement in milli percent.
+
 What:		/sys/bus/iio/devices/iio:deviceX/in_accel_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_accel_x_offset
 What:		/sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 2fe88c1..acc911a 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -69,6 +69,7 @@ static const char * const iio_chan_type_name_spec[] = {
 	[IIO_ALTVOLTAGE] = "altvoltage",
 	[IIO_CCT] = "cct",
 	[IIO_PRESSURE] = "pressure",
+	[IIO_HUMIDITYRELATIVE] = "humidityrelative",
 };
 
 static const char * const iio_modifier_names[] = {
diff --git a/include/linux/iio/types.h b/include/linux/iio/types.h
index 4ac928e..084d882 100644
--- a/include/linux/iio/types.h
+++ b/include/linux/iio/types.h
@@ -29,6 +29,7 @@ enum iio_chan_type {
 	IIO_ALTVOLTAGE,
 	IIO_CCT,
 	IIO_PRESSURE,
+	IIO_HUMIDITYRELATIVE,
 };
 
 enum iio_modifier {
-- 
1.7.2.5

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