dt-bindings: iio/temperature: Add thermocouple types (and doc)

This patch introduces common thermocouple types used by various
temperature sensors. Also a brief documentation explaining this
"thermocouple-type" property.

Signed-off-by: Patrick Havelange <patrick.havelange@essensium.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/Documentation/devicetree/bindings/iio/temperature/temperature-bindings.txt b/Documentation/devicetree/bindings/iio/temperature/temperature-bindings.txt
new file mode 100644 (file)
index 0000000..8f339ca
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/temperature/temperature-bindings.txt
@@ -0,0 +1,7 @@
+If the temperature sensor device can be configured to use some specific
+thermocouple type, you can use the defined types provided in the file
+"include/dt-bindings/iio/temperature/thermocouple.h".
+
+Property:
+thermocouple-type:     A single cell representing the type of the thermocouple
+                       used by the device.

diff --git a/include/dt-bindings/iio/temperature/thermocouple.h b/include/dt-bindings/iio/temperature/thermocouple.h
new file mode 100644 (file)
index 0000000..ce037f5
--- /dev/null
+++ b/include/dt-bindings/iio/temperature/thermocouple.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _DT_BINDINGS_TEMPERATURE_THERMOCOUPLE_H
+#define _DT_BINDINGS_TEMPERATURE_THERMOCOUPLE_H
+
+
+#define THERMOCOUPLE_TYPE_B    0x00
+#define THERMOCOUPLE_TYPE_E    0x01
+#define THERMOCOUPLE_TYPE_J    0x02
+#define THERMOCOUPLE_TYPE_K    0x03
+#define THERMOCOUPLE_TYPE_N    0x04
+#define THERMOCOUPLE_TYPE_R    0x05
+#define THERMOCOUPLE_TYPE_S    0x06
+#define THERMOCOUPLE_TYPE_T    0x07
+
+#endif /* _DT_BINDINGS_TEMPERATURE_THERMOCOUPLE_H */