iio: ph: add IIO_PH channel type
Signed-off-by: Matt Ranostay <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index 8fadd27..80c6fce 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -1493,3 +1493,10 @@
This ABI is especially applicable for humidity sensors
to heatup the device and get rid of any condensation
in some humidity environment
+
+What: /sys/bus/iio/devices/iio:deviceX/in_ph_raw
+KernelVersion: 4.5
+Contact: [email protected]
+Description:
+ Raw (unscaled no offset etc.) pH reading of a substance as a negative
+ base-10 logarithm of hydrodium ions in a litre of water.
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index fd01f34..eb01a83 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -77,6 +77,7 @@
[IIO_VELOCITY] = "velocity",
[IIO_CONCENTRATION] = "concentration",
[IIO_RESISTANCE] = "resistance",
+ [IIO_PH] = "ph",
};
static const char * const iio_modifier_names[] = {
diff --git a/include/uapi/linux/iio/types.h b/include/uapi/linux/iio/types.h
index 7c63bd6..c077617 100644
--- a/include/uapi/linux/iio/types.h
+++ b/include/uapi/linux/iio/types.h
@@ -37,6 +37,7 @@
IIO_VELOCITY,
IIO_CONCENTRATION,
IIO_RESISTANCE,
+ IIO_PH,
};
enum iio_modifier {
