[PATCH v2 1/3] dt-bindings: media: i2c: Add OmniVision OV32C4

[Robert Bozik <robertbozik@gmail.com>]

Add a binding for the OmniVision OV32C4, a 32 megapixel RGBC CMOS image
sensor with on-chip 4-cell fusion, a 4-lane MIPI CSI-2 D-PHY transmitter
and the standard SCCB command interface.

The sensor ships in laptops as an under-display camera, where it is
described by ACPI; the binding follows ovti,ov08x40.yaml, which covers
the closest relative already in tree.

Assisted-by: Claude:claude-opus-5 sparse
Assisted-by: Claude:claude-fable-5 sparse
Signed-off-by: Robert Bozik <robertbozik@gmail.com>
---
Changes in v2:
- Drop the frequency from the xvclk description. 19.2 MHz is what this
  platform provides and what the driver's register tables assume, not a
  requirement of the sensor; the example keeps it in
  assigned-clock-rates (Conor Dooley).
- avdd-supply, dovdd-supply and dvdd-supply are now plain "true"; the
  names already say which rail is which (Conor Dooley).
- Drop the sentence listing the modes the driver supports. The binding
  describes the hardware.
- Signed-off-by placed last in the trailer block (Krzysztof Kozlowski).

 .../bindings/media/i2c/ovti,ov32c4.yaml       | 105 ++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/ovti,ov32c4.yaml

diff --git a/Documentation/devicetree/bindings/media/i2c/ovti,ov32c4.yaml b/Documentation/devicetree/bindings/media/i2c/ovti,ov32c4.yaml
new file mode 100644
index 000000000..804307cd0
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ovti,ov32c4.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/ovti,ov32c4.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: OmniVision OV32C4 Image Sensor
+
+maintainers:
+  - Robert Bozik <robertbozik@gmail.com>
+
+description:
+  The OmniVision OV32C4 is a 32 megapixel RGBC (red, green, blue and clear)
+  CMOS image sensor in a 4-cell arrangement, with on-chip 4-cell fusion and
+  binning. It has a 6528x4896 active pixel array, a 4-lane MIPI CSI-2 D-PHY
+  transmitter and the standard SCCB command interface.
+
+allOf:
+  - $ref: /schemas/media/video-interface-devices.yaml#
+
+properties:
+  compatible:
+    const: ovti,ov32c4
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+    description: Input clock (XVCLK).
+
+  avdd-supply: true
+
+  dovdd-supply: true
+
+  dvdd-supply: true
+
+  reset-gpios:
+    maxItems: 1
+    description: Active low GPIO connected to the XSHUTDOWN pad of the sensor.
+
+  port:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    additionalProperties: false
+
+    properties:
+      endpoint:
+        $ref: /schemas/media/video-interfaces.yaml#
+        additionalProperties: false
+
+        properties:
+          data-lanes:
+            items:
+              - const: 1
+              - const: 2
+              - const: 3
+              - const: 4
+          link-frequencies: true
+          remote-endpoint: true
+
+        required:
+          - data-lanes
+          - link-frequencies
+          - remote-endpoint
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - port
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        camera@36 {
+            compatible = "ovti,ov32c4";
+            reg = <0x36>;
+
+            clocks = <&ov32c4_clk>;
+            assigned-clocks = <&ov32c4_clk>;
+            assigned-clock-rates = <19200000>;
+
+            avdd-supply = <&vreg_2p8>;
+            dovdd-supply = <&vreg_1p8>;
+            dvdd-supply = <&vreg_1p1>;
+
+            reset-gpios = <&tlmm 111 GPIO_ACTIVE_LOW>;
+
+            port {
+                ov32c4_ep: endpoint {
+                    remote-endpoint = <&csiphy0_ep>;
+                    data-lanes = <1 2 3 4>;
+                    link-frequencies = /bits/ 64 <400000000>;
+                };
+            };
+        };
+    };
+...
-- 
2.53.0