[PATCH v11 1/8] dt-bindings: iio: add Open Sensor Fusion device

[Jinseob Kim <kimjinseob88@gmail.com>]

Describe OSF GREEN as the current hardware model with a generic OSF
host-interface fallback. OSF hardware variants may use different sensor
configurations. A model-specific compatible allows future power sequencing,
errata and quirks without changing the common fallback.

The current Linux driver needs no GREEN-specific handling and matches the
generic compatible. Sensor inventory and protocol version are discovered
from runtime wire frames rather than encoded in the compatible strings.

Assisted-by: LLM
Signed-off-by: Jinseob Kim <kimjinseob88@gmail.com>
---
 .../bindings/iio/opensensorfusion,osf.yaml    | 55 +++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.yaml  |  2 +
 MAINTAINERS                                   |  6 ++
 3 files changed, 63 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 0000000000000000000000000000000000000000..c180c6e41008ee9443411a88c234ae1c19b8de2a
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/opensensorfusion,osf.yaml
@@ -0,0 +1,55 @@
+# 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 Open Sensor Fusion GREEN sensor hub and its
+  generic 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:
+    items:
+      - const: opensensorfusion,osf-green
+      - 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-green",
+                         "opensensorfusion,osf";
+            vcc-supply = <&vcc_sensor>;
+        };
+    };
+...
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index ba2002969373433b1f48118872c46cf7bcfff276..0ec4e481c64bc0aac8937c4fbd0d96dbb359b0fb 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -1267,6 +1267,8 @@ patternProperties:
     description: OpenPandora GmbH
   "^openrisc,.*":
     description: OpenRISC.io
+  "^opensensorfusion,.*":
+    description: Open Sensor Fusion
   "^openwrt,.*":
     description: OpenWrt
   "^option,.*":
diff --git a/MAINTAINERS b/MAINTAINERS
index 3a2dfd1a4fd84ccb068332035f054ac77dada814..edae5bf594fc3c72fb39e14b797c7b2eccc11471 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20537,6 +20537,12 @@ F:	Documentation/process/maintainer-devicetree.rst
 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