iio: resistance: add IIO_RESISTANCE channel type

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

3 files changed, 10 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 08903b940957..8ce14c85156d 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1471,3 +1471,11 @@ KernelVersion:	4.3
 Contact:        linux-iio@vger.kernel.org
 Description:
                 Raw (unscaled no offset etc.) percentage reading of a substance.
+
+What:           /sys/bus/iio/devices/iio:deviceX/in_resistance_raw
+What:           /sys/bus/iio/devices/iio:deviceX/in_resistanceX_raw
+KernelVersion:  4.3
+Contact:        linux-iio@vger.kernel.org
+Description:
+                Raw (unscaled no offset etc.) resistance reading that can be processed
+                into an ohm value.
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index ee09a945a2c7..208358f9e7e3 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -76,6 +76,7 @@ static const char * const iio_chan_type_name_spec[] = {
         [IIO_DISTANCE] = "distance",
         [IIO_VELOCITY] = "velocity",
         [IIO_CONCENTRATION] = "concentration",
+        [IIO_RESISTANCE] = "resistance",
 };
 
 static const char * const iio_modifier_names[] = {
diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
index 1e4c4e346ffb..7c63bd67c36e 100644
--- a/include/uapi/linux/iio/types.h
+++ b/include/uapi/linux/iio/types.h
@@ -36,6 +36,7 @@ enum iio_chan_type {
         IIO_DISTANCE,
         IIO_VELOCITY,
         IIO_CONCENTRATION,
+        IIO_RESISTANCE,
 };
 
 enum iio_modifier {