[PATCH RFC 1/3] dt-bindings: iio: imu: add Open Sensor Fusion UART binding

[Jinseob Kim <kimjinseob88@gmail.com>]

Add a binding for a UART-attached Open Sensor Fusion device.

The device is exposed as a serdev child node using the
opensensorfusion,osf-uart compatible string. Keep Raspberry Pi overlay and
test notes outside the binding.

The binding has been checked with dt_binding_check.

Signed-off-by: Jinseob Kim <kimjinseob88@gmail.com>
---
 .../iio/imu/opensensorfusion,osf-uart.yaml    | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/imu/opensensorfusion,osf-uart.yaml

diff --git a/Documentation/devicetree/bindings/iio/imu/opensensorfusion,osf-uart.yaml b/Documentation/devicetree/bindings/iio/imu/opensensorfusion,osf-uart.yaml
new file mode 100644
index 000000000..6f329c326
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/imu/opensensorfusion,osf-uart.yaml
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/imu/opensensorfusion,osf-uart.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Open Sensor Fusion UART Sensor Aggregation Device
+
+maintainers:
+  - Jinseob Kim <kimjinseob88@gmail.com>
+
+description: |
+  Open Sensor Fusion is a UART-attached sensor aggregation device. The device
+  exposes an OSF protocol v0 data stream over its host UART interface and may
+  report capabilities and samples for multiple sensor classes.
+
+properties:
+  compatible:
+    const: opensensorfusion,osf-uart
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    serial {
+        sensor {
+            compatible = "opensensorfusion,osf-uart";
+        };
+    };
+...
-- 
2.43.0