[PATCH RFC 2/4] dt-bindings: media: i2c: Add Samsung S5K3L6 image sensor

[Vincent Cloutier]

From: Vincent Cloutier <vincent at cloutier.co>

Add a devicetree binding for the Samsung S5K3L6 13MP raw Bayer image
sensor.

This starts the upstreaming work for the Librem 5 rear camera path. The
binding describes the validated two-lane MIPI CSI-2 configuration.

Signed-off-by: Vincent Cloutier <vincent at cloutier.co>
Assisted-by: OpenCode:gpt-5.5
---
 .../bindings/media/i2c/samsung,s5k3l6.yaml         | 117 +++++++++++++++++++++
 1 file changed, 117 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/samsung,s5k3l6.yaml b/Documentation/devicetree/bindings/media/i2c/samsung,s5k3l6.yaml
new file mode 100644
index 000000000000..96150764b341
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/samsung,s5k3l6.yaml
@@ -0,0 +1,117 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/samsung,s5k3l6.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung S5K3L6 13MP MIPI CSI-2 image sensor
+
+maintainers:
+  - Vincent Cloutier <vincent at cloutier.co>
+  - Purism Kernel Team <kernel at puri.sm>
+
+description: |-
+  The Samsung S5K3L6 is a raw Bayer image sensor with a MIPI CSI-2 image
+  data interface and an I2C-compatible control bus.
+
+allOf:
+  - $ref: /schemas/media/video-interface-devices.yaml#
+
+properties:
+  compatible:
+    const: samsung,s5k3l6
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    description: Reference to the sensor input clock.
+    maxItems: 1
+
+  reset-gpios:
+    description: Active-low reset GPIO.
+    maxItems: 1
+
+  vdda-supply:
+    description: Analog power supply.
+
+  vddd-supply:
+    description: Digital core power supply.
+
+  vddio-supply:
+    description: Digital I/O power supply.
+
+  port:
+    $ref: /schemas/graph.yaml#/$defs/port-base
+    unevaluatedProperties: false
+
+    properties:
+      endpoint:
+        $ref: /schemas/media/video-interfaces.yaml#
+        unevaluatedProperties: false
+
+        properties:
+          data-lanes:
+            items:
+              - const: 1
+              - const: 2
+
+          link-frequencies:
+            minItems: 3
+            maxItems: 3
+            items:
+              - const: 537500000
+              - const: 600000000
+              - const: 625000000
+
+        required:
+          - data-lanes
+          - link-frequencies
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - vdda-supply
+  - vddd-supply
+  - vddio-supply
+  - port
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx8mq-clock.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        camera at 2d {
+            compatible = "samsung,s5k3l6";
+            reg = <0x2d>;
+
+            clocks = <&clk IMX8MQ_CLK_CLKO2>;
+            assigned-clocks = <&clk IMX8MQ_CLK_CLKO2>;
+            assigned-clock-rates = <25000000>;
+
+            reset-gpios = <&gpio1 26 GPIO_ACTIVE_LOW>;
+            vdda-supply = <&reg_camera_vdda>;
+            vddd-supply = <&reg_camera_vddd>;
+            vddio-supply = <&reg_camera_vddio>;
+
+            orientation = <1>;
+            rotation = <270>;
+
+            port {
+                camera_out: endpoint {
+                    data-lanes = <1 2>;
+                    link-frequencies = /bits/ 64
+                        <537500000 600000000 625000000>;
+                    remote-endpoint = <&mipi_csi2_in>;
+                };
+            };
+        };
+    };
+...
-- 
2.53.0