[PATCH v8 1/5] dt-bindings: iio: add Open Sensor Fusion device

[Jinseob Kim <kimjinseob88@gmail.com>]

Add a binding for the generic Open Sensor Fusion host interface.

Open Sensor Fusion devices report capabilities and samples over an OSF
protocol stream. Sensor channels are discovered at runtime from
capability reports instead of being described individually in Device
Tree.

The protocol version is discovered at runtime from the OSF frame header.
OSF GREEN is a product identity, and OSF0 is a wire-format magic value,
so neither is used as the Linux compatible string.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Jinseob Kim <kimjinseob88@gmail.com>
---
 .../bindings/iio/opensensorfusion,osf.yaml    | 52 +++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.yaml  |  2 +
 MAINTAINERS                                   |  6 +++
 3 files changed, 60 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/opensensorfusion,osf.yaml

diff --git a/Documentation/devicetree/bindings/iio/opensensorfusion,osf.yaml b/Documentation/devicetree/bindings/iio/opensensorfusion,osf.yaml
new file mode 100644
index 000000000000..3998390828cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/opensensorfusion,osf.yaml
@@ -0,0 +1,52 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/opensensorfusion,osf.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Open Sensor Fusion Sensor Aggregation Hub
+
+maintainers:
+  - Jinseob Kim <kimjinseob88@gmail.com>
+
+description: |
+  This binding documents the generic Open Sensor Fusion host interface. Open
+  Sensor Fusion is a sensor aggregation hub. The hub exposes an OSF protocol
+  data stream over its host interface and reports capabilities and samples for
+  multiple sensor classes. The actual sensor channels are discovered at runtime
+  from OSF capability reports instead of describing them in Device Tree. The
+  protocol version is discovered at runtime.
+
+  Public project documentation is available at:
+
+    https://github.com/opensensorfusion
+
+  OSF0, protocol_major, and protocol_minor are wire-protocol details
+  exchanged in OSF frames.
+
+allOf:
+  - $ref: /schemas/serial/serial-peripheral-props.yaml#
+
+properties:
+  compatible:
+    const: opensensorfusion,osf
+
+  vcc-supply:
+    description:
+      Regulator supplying power to the Open Sensor Fusion device.
+
+required:
+  - compatible
+  - vcc-supply
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    serial {
+        sensor {
+            compatible = "opensensorfusion,osf";
+            vcc-supply = <&vcc_sensor>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index f88e595f7077..d746aadb994f 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1245,6 +1245,8 @@ patternProperties:
     description: OpenPandora GmbH
   "^openrisc,.*":
     description: OpenRISC.io
+  "^opensensorfusion,.*":
+    description: Open Sensor Fusion
   "^openwrt,.*":
     description: OpenWrt
   "^option,.*":
diff --git a/MAINTAINERS b/MAINTAINERS
index 3c5084fec202..17652ba6039d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20293,6 +20293,12 @@ F:	Documentation/devicetree/
 F:	arch/*/boot/dts/
 F:	include/dt-bindings/
 
+OPEN SENSOR FUSION
+M:	Jinseob Kim <kimjinseob88@gmail.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/iio/opensensorfusion,osf.yaml
+K:	opensensorfusion
+
 OPENCOMPUTE PTP CLOCK DRIVER
 M:	Vadim Fedorenko <vadim.fedorenko@linux.dev>
 L:	netdev@vger.kernel.org
-- 
2.43.0