[PATCH v2] dt-bindings: media: Add Omnivision ov8858 binding

[Nicholas Roth <nicholas@rothemail.net>]

Add a device tree binding for the Omnivision OV8858 image sensor.
The OV8858 is an 8 megapixel image sensor which provides images in RAW
format over MIPI CSI-2 data bus and is controlled through an
I2C-compatibile SCCB bus.

Tested on PinePhone Pro with libcamera cam and qcam.

Signed-off-by: Nicholas Roth <nicholas@rothemail.net>
---
 .../devicetree/bindings/media/i2c/ov8858.yaml | 139 ++++++++++++++++++
 1 file changed, 139 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/media/i2c/ov8858.yaml

diff --git a/Documentation/devicetree/bindings/media/i2c/ov8858.yaml b/Documentation/devicetree/bindings/media/i2c/ov8858.yaml
new file mode 100644
index 000000000000..f004e57b05ed
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ov8858.yaml
@@ -0,0 +1,139 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/ov8858.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Omnivision OV8856 CMOS Sensor Device Tree Bindings
+
+maintainers:
+  - Nicholas Roth <nicholas@rothemail.net>
+
+description: |-
+  The Omnivision OV8858 is an 8 megapixel image sensor which provides
+  images in RAW format over MIPI CSI-2 data bus with up to 4 lanes
+  and is controlled through an I2C-compatibile SCCB bus.
+
+properties:
+  compatible:
+    const: ovti,ov8858
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    description:
+      Input clock for the sensor.
+    items:
+      - const: xvclk
+
+  clock-frequency:
+    description:
+      Frequency of the xvclk clock in Hertz.
+    minimum: 6000000
+    default: 24000000
+    maximum: 27000000
+
+  dovdd-supply:
+    description:
+      Definition of the regulator used as interface power supply.
+
+  avdd-supply:
+    description:
+      Definition of the regulator used as analog power supply.
+
+  dvdd-supply:
+    description:
+      Definition of the regulator used as digital power supply.
+
+  reset-gpios:
+    description:
+      The phandle and specifier for the GPIO that controls sensor reset.
+      This corresponds to the hardware pin XSHUTDN which is physically
+      active low.
+
+  powerdown-gpios:
+    description:
+      The phandle and specifier for the GPIO that controls power down.
+      This corresponds to the hardware pin PWDNB which is physically
+      active low.
+
+  port:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    additionalProperties: false
+
+    properties:
+      endpoint:
+        $ref: /schemas/media/video-interfaces.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          data-lanes:
+            description: |-
+              The driver supports both two- and four-lane operation.
+            items:
+              - const: 1
+              - const: 2
+              - const: 3
+              - const: 4
+
+          link-frequencies:
+            description: Frequencies listed are driver, not h/w limitations.
+            maxItems: 1
+            items:
+              enum: [ 360000000 ]
+
+        required:
+          - link-frequencies
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - clock-frequency
+  - dovdd-supply
+  - avdd-supply
+  - dvdd-supply
+  - reset-gpios
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ucam: camera@36 {
+            compatible = "ovti,ov8858";
+            reg = <0x36>;
+
+            reset-gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
+            powerdown-gpios = <&gpio2 2 GPIO_ACTIVE_LOW>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&ucam_pdn &ucam_rst>;
+
+            clocks = <&cam_osc>;
+            clock-names = "xvclk";
+            clock-frequency = <24000000>;
+
+            dovdd-supply = <&vcc1v8_dvp>;
+            dvdd-supply = <&vcc1v2_dvp>;
+            avdd-supply = <&vcc2v8_dvp>;
+
+            port {
+                ucam_out: endpoint {
+                    remote-endpoint = <&mipi_in_ucam>;
+                    data-lanes = <1 2 3 4>;
+                    link-frequencies = /bits/ 64 <360000000>;
+                };
+            };
+        };
+    };
-- 
2.34.1