media: dt-bindings: media: add TI DS90UB960 FPD-Link III Deserializer

Add DT bindings for TI DS90UB960 FPD-Link III Deserializer.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

Documentation/devicetree/bindings/media/i2c/ti,ds90ub960.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/media/i2c/ti,ds90ub960.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments DS90UB9XX Family FPD-Link Deserializer Hubs
+
+maintainers:
+  - Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
+
+description:
+  The TI DS90UB9XX devices are FPD-Link video deserializers with I2C and GPIO
+  forwarding.
+
+allOf:
+  - $ref: /schemas/i2c/i2c-atr.yaml#
+
+properties:
+  compatible:
+    enum:
+      - ti,ds90ub960-q1
+      - ti,ds90ub9702-q1
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+    description:
+      Reference clock connected to the REFCLK pin.
+
+  clock-names:
+    items:
+      - const: refclk
+
+  powerdown-gpios:
+    maxItems: 1
+    description:
+      Specifier for the GPIO connected to the PDB pin.
+
+  i2c-alias-pool:
+    minItems: 1
+    maxItems: 32
+
+  links:
+    type: object
+    additionalProperties: false
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+      ti,manual-strobe:
+        type: boolean
+        description:
+          Enable manual strobe position and EQ level
+
+    patternProperties:
+      '^link@[0-3]$':
+        type: object
+        additionalProperties: false
+        properties:
+          reg:
+            description: The link number
+            maxItems: 1
+
+          i2c-alias:
+            description:
+              The I2C address used for the serializer. Transactions to this
+              address on the I2C bus where the deserializer resides are
+              forwarded to the serializer.
+
+          ti,rx-mode:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            enum:
+              - 0 # RAW10
+              - 1 # RAW12 HF
+              - 2 # RAW12 LF
+              - 3 # CSI2 SYNC
+              - 4 # CSI2 NON-SYNC
+            description:
+              FPD-Link Input Mode. This should reflect the hardware and the
+              default mode of the connected device.
+
+          ti,cdr-mode:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            enum:
+              - 0 # FPD-Link III
+              - 1 # FPD-Link IV
+            description:
+              FPD-Link CDR Mode. This should reflect the hardware and the
+              default mode of the connected device.
+
+          ti,strobe-pos:
+            $ref: /schemas/types.yaml#/definitions/int32
+            minimum: -13
+            maximum: 13
+            description: Manual strobe position
+
+          ti,eq-level:
+            $ref: /schemas/types.yaml#/definitions/uint32
+            maximum: 14
+            description: Manual EQ level
+
+          serializer:
+            type: object
+            description: FPD-Link Serializer node
+
+        required:
+          - reg
+          - i2c-alias
+          - ti,rx-mode
+          - serializer
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: FPD-Link input 0
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+            description:
+              Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+              hsync-active and vsync-active must be defined.
+
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: FPD-Link input 1
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+            description:
+              Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+              hsync-active and vsync-active must be defined.
+
+      port@2:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: FPD-Link input 2
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+            description:
+              Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+              hsync-active and vsync-active must be defined.
+
+      port@3:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: FPD-Link input 3
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+            description:
+              Endpoint for FPD-Link port. If the RX mode for this port is RAW,
+              hsync-active and vsync-active must be defined.
+
+      port@4:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: CSI-2 Output 0
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                minItems: 1
+                maxItems: 4
+              link-frequencies:
+                maxItems: 1
+
+            required:
+              - data-lanes
+              - link-frequencies
+
+      port@5:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: CSI-2 Output 1
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                minItems: 1
+                maxItems: 4
+              link-frequencies:
+                maxItems: 1
+
+            required:
+              - data-lanes
+              - link-frequencies
+
+    required:
+      - port@0
+      - port@1
+      - port@2
+      - port@3
+      - port@4
+      - port@5
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - ports
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+      clock-frequency = <400000>;
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      deser@3d {
+        compatible = "ti,ds90ub960-q1";
+        reg = <0x3d>;
+
+        clock-names = "refclk";
+        clocks = <&fixed_clock>;
+
+        powerdown-gpios = <&pca9555 7 GPIO_ACTIVE_LOW>;
+
+        i2c-alias-pool = <0x4a 0x4b 0x4c 0x4d 0x4e 0x4f>;
+
+        ports {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          /* Port 0, Camera 0 */
+          port@0 {
+            reg = <0>;
+
+            ub960_fpd3_1_in: endpoint {
+              remote-endpoint = <&ub953_1_out>;
+            };
+          };
+
+          /* Port 1, Camera 1 */
+          port@1 {
+            reg = <1>;
+
+            ub960_fpd3_2_in: endpoint {
+              remote-endpoint = <&ub913_2_out>;
+              hsync-active = <0>;
+              vsync-active = <1>;
+            };
+          };
+
+          /* Port 2, unconnected */
+          port@2 {
+            reg = <2>;
+          };
+
+          /* Port 3, unconnected */
+          port@3 {
+            reg = <3>;
+          };
+
+          /* Port 4, CSI-2 TX */
+          port@4 {
+            reg = <4>;
+            ds90ub960_0_csi_out: endpoint {
+              data-lanes = <1 2 3 4>;
+              link-frequencies = /bits/ 64 <800000000>;
+              remote-endpoint = <&csi2_phy0>;
+            };
+          };
+
+          /* Port 5, unconnected */
+          port@5 {
+            reg = <5>;
+          };
+        };
+
+        links {
+          #address-cells = <1>;
+          #size-cells = <0>;
+
+          /* Link 0 has DS90UB953 serializer and IMX274 sensor */
+
+          link@0 {
+            reg = <0>;
+            i2c-alias = <0x44>;
+
+            ti,rx-mode = <3>;
+
+            serializer1: serializer {
+              compatible = "ti,ds90ub953-q1";
+
+              gpio-controller;
+              #gpio-cells = <2>;
+
+              #clock-cells = <0>;
+
+              ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                  reg = <0>;
+                  ub953_1_in: endpoint {
+                    data-lanes = <1 2 3 4>;
+                    remote-endpoint = <&sensor_1_out>;
+                  };
+                };
+
+                port@1 {
+                  reg = <1>;
+
+                  ub953_1_out: endpoint {
+                    remote-endpoint = <&ub960_fpd3_1_in>;
+                  };
+                };
+              };
+
+              i2c {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                sensor@1a {
+                  compatible = "sony,imx274";
+                  reg = <0x1a>;
+
+                  reset-gpios = <&serializer1 0 GPIO_ACTIVE_LOW>;
+
+                  port {
+                    sensor_1_out: endpoint {
+                      remote-endpoint = <&ub953_1_in>;
+                    };
+                  };
+                };
+              };
+            };
+          };  /* End of link@0 */
+
+          /* Link 1 has DS90UB913 serializer and MT9V111 sensor */
+
+          link@1 {
+            reg = <1>;
+            i2c-alias = <0x45>;
+
+            ti,rx-mode = <0>;
+
+            serializer2: serializer {
+              compatible = "ti,ds90ub913a-q1";
+
+              gpio-controller;
+              #gpio-cells = <2>;
+
+              clocks = <&clk_cam_48M>;
+              clock-names = "clkin";
+
+              #clock-cells = <0>;
+
+              ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                  reg = <0>;
+                  ub913_2_in: endpoint {
+                    remote-endpoint = <&sensor_2_out>;
+                    pclk-sample = <1>;
+                  };
+                };
+
+                port@1 {
+                  reg = <1>;
+
+                  ub913_2_out: endpoint {
+                    remote-endpoint = <&ub960_fpd3_2_in>;
+                  };
+                };
+              };
+
+              i2c {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                sensor@48 {
+                  compatible = "aptina,mt9v111";
+                  reg = <0x48>;
+
+                  clocks = <&serializer2>;
+
+                  port {
+                    sensor_2_out: endpoint {
+                      remote-endpoint = <&ub913_2_in>;
+                    };
+                  };
+                };
+              };
+            };
+          }; /* End of link@1 */
+        };
+      };
+    };
+...