dt-bindings: display: bridge: renesas,lvds: Convert binding to YAML

Convert the Renesas R-Car LVDS encoder text binding to YAML.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200514214211.9036-1-laurent.pinchart+renesas@ideasonboard.com

Documentation/devicetree/bindings/display/bridge/renesas,lvds.txt

-Renesas R-Car LVDS Encoder
-==========================
-
-These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
-Gen2, R-Car Gen3 and RZ/G SoCs.
-
-Required properties:
-
-- compatible : Shall contain one of
-  - "renesas,r8a7743-lvds" for R8A7743 (RZ/G1M) compatible LVDS encoders
-  - "renesas,r8a7744-lvds" for R8A7744 (RZ/G1N) compatible LVDS encoders
-  - "renesas,r8a774a1-lvds" for R8A774A1 (RZ/G2M) compatible LVDS encoders
-  - "renesas,r8a774b1-lvds" for R8A774B1 (RZ/G2N) compatible LVDS encoders
-  - "renesas,r8a774c0-lvds" for R8A774C0 (RZ/G2E) compatible LVDS encoders
-  - "renesas,r8a7790-lvds" for R8A7790 (R-Car H2) compatible LVDS encoders
-  - "renesas,r8a7791-lvds" for R8A7791 (R-Car M2-W) compatible LVDS encoders
-  - "renesas,r8a7793-lvds" for R8A7793 (R-Car M2-N) compatible LVDS encoders
-  - "renesas,r8a7795-lvds" for R8A7795 (R-Car H3) compatible LVDS encoders
-  - "renesas,r8a7796-lvds" for R8A7796 (R-Car M3-W) compatible LVDS encoders
-  - "renesas,r8a77965-lvds" for R8A77965 (R-Car M3-N) compatible LVDS encoders
-  - "renesas,r8a77970-lvds" for R8A77970 (R-Car V3M) compatible LVDS encoders
-  - "renesas,r8a77980-lvds" for R8A77980 (R-Car V3H) compatible LVDS encoders
-  - "renesas,r8a77990-lvds" for R8A77990 (R-Car E3) compatible LVDS encoders
-  - "renesas,r8a77995-lvds" for R8A77995 (R-Car D3) compatible LVDS encoders
-
-- reg: Base address and length for the memory-mapped registers
-- clocks: A list of phandles + clock-specifier pairs, one for each entry in
-  the clock-names property.
-- clock-names: Name of the clocks. This property is model-dependent.
-  - The functional clock, which mandatory for all models, shall be listed
-    first, and shall be named "fck".
-  - On R8A77990, R8A77995 and R8A774C0, the LVDS encoder can use the EXTAL or
-    DU_DOTCLKINx clocks. Those clocks are optional. When supplied they must be
-    named "extal" and "dclkin.x" respectively, with "x" being the DU_DOTCLKIN
-    numerical index.
-  - When the clocks property only contains the functional clock, the
-    clock-names property may be omitted.
-- resets: A phandle + reset specifier for the module reset
-
-Required nodes:
-
-The LVDS encoder has two video ports. Their connections are modelled using the
-OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
-
-- Video port 0 corresponds to the parallel RGB input
-- Video port 1 corresponds to the LVDS output
-
-Each port shall have a single endpoint.
-
-Optional properties:
-
-- renesas,companion : phandle to the companion LVDS encoder. This property is
-  mandatory for the first LVDS encoder on D3 and E3 SoCs, and shall point to
-  the second encoder to be used as a companion in dual-link mode. It shall not
-  be set for any other LVDS encoder.
-
-
-Example:
-
-	lvds0: lvds@feb90000 {
-		compatible = "renesas,r8a77990-lvds";
-		reg = <0 0xfeb90000 0 0x20>;
-		clocks = <&cpg CPG_MOD 727>;
-		power-domains = <&sysc R8A77990_PD_ALWAYS_ON>;
-		resets = <&cpg 727>;
-
-		renesas,companion = <&lvds1>;
-
-		ports {
-			#address-cells = <1>;
-			#size-cells = <0>;
-
-			port@0 {
-				reg = <0>;
-				lvds0_in: endpoint {
-					remote-endpoint = <&du_out_lvds0>;
-				};
-			};
-			port@1 {
-				reg = <1>;
-				lvds0_out: endpoint {
-				};
-			};
-		};
-	};

Documentation/devicetree/bindings/display/bridge/renesas,lvds.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/renesas,lvds.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car LVDS Encoder
+
+maintainers:
+  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+
+description: |
+  These DT bindings describe the LVDS encoder embedded in the Renesas R-Car
+  Gen2, R-Car Gen3, RZ/G1 and RZ/G2 SoCs.
+
+properties:
+  compatible:
+    enum:
+      - renesas,r8a7743-lvds # for RZ/G1M compatible LVDS encoders
+      - renesas,r8a7744-lvds # for RZ/G1N compatible LVDS encoders
+      - renesas,r8a774a1-lvds # for RZ/G2M compatible LVDS encoders
+      - renesas,r8a774b1-lvds # for RZ/G2N compatible LVDS encoders
+      - renesas,r8a774c0-lvds # for RZ/G2E compatible LVDS encoders
+      - renesas,r8a7790-lvds # for R-Car H2 compatible LVDS encoders
+      - renesas,r8a7791-lvds # for R-Car M2-W compatible LVDS encoders
+      - renesas,r8a7793-lvds # for R-Car M2-N compatible LVDS encoders
+      - renesas,r8a7795-lvds # for R-Car H3 compatible LVDS encoders
+      - renesas,r8a7796-lvds # for R-Car M3-W compatible LVDS encoders
+      - renesas,r8a77965-lvds # for R-Car M3-N compatible LVDS encoders
+      - renesas,r8a77970-lvds # for R-Car V3M compatible LVDS encoders
+      - renesas,r8a77980-lvds # for R-Car V3H compatible LVDS encoders
+      - renesas,r8a77990-lvds # for R-Car E3 compatible LVDS encoders
+      - renesas,r8a77995-lvds # for R-Car D3 compatible LVDS encoders
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 1
+    maxItems: 4
+
+  clock-names:
+    minItems: 1
+    maxItems: 4
+
+  resets:
+    maxItems: 1
+
+  ports:
+    type: object
+    description: |
+      This device has two video ports. Their connections are modelled using the
+      OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
+      Each port shall have a single endpoint.
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+      port@0:
+        type: object
+        description: Parallel RGB input port
+
+      port@1:
+        type: object
+        description: LVDS output port
+
+    required:
+      - port@0
+      - port@1
+
+    additionalProperties: false
+
+  power-domains:
+    maxItems: 1
+
+  renesas,companion:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to the companion LVDS encoder. This property is mandatory
+      for the first LVDS encoder on D3 and E3 SoCs, and shall point to
+      the second encoder to be used as a companion in dual-link mode. It
+      shall not be set for any other LVDS encoder.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - power-domains
+  - resets
+  - ports
+
+if:
+  properties:
+    compatible:
+      enum:
+        - renesas,r8a774c0-lvds
+        - renesas,r8a77990-lvds
+        - renesas,r8a77995-lvds
+then:
+  properties:
+    clocks:
+      minItems: 1
+      maxItems: 4
+      items:
+        - description: Functional clock
+        - description: EXTAL input clock
+        - description: DU_DOTCLKIN0 input clock
+        - description: DU_DOTCLKIN1 input clock
+
+    clock-names:
+      minItems: 1
+      maxItems: 4
+      items:
+        - const: fck
+        # The LVDS encoder can use the EXTAL or DU_DOTCLKINx clocks.
+        # These clocks are optional.
+        - enum:
+          - extal
+          - dclkin.0
+          - dclkin.1
+        - enum:
+          - extal
+          - dclkin.0
+          - dclkin.1
+        - enum:
+          - extal
+          - dclkin.0
+          - dclkin.1
+
+  required:
+    - clock-names
+
+else:
+  properties:
+    clocks:
+      maxItems: 1
+      items:
+        - description: Functional clock
+
+    clock-names:
+      maxItems: 1
+      items:
+        - const: fck
+
+    renesas,companion: false
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/renesas-cpg-mssr.h>
+    #include <dt-bindings/power/r8a7795-sysc.h>
+
+    lvds@feb90000 {
+        compatible = "renesas,r8a7795-lvds";
+        reg = <0xfeb90000 0x14>;
+        clocks = <&cpg CPG_MOD 727>;
+        power-domains = <&sysc R8A7795_PD_ALWAYS_ON>;
+        resets = <&cpg 727>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+                lvds_in: endpoint {
+                    remote-endpoint = <&du_out_lvds0>;
+                };
+            };
+            port@1 {
+                reg = <1>;
+                lvds_out: endpoint {
+                    remote-endpoint = <&panel_in>;
+                };
+            };
+        };
+    };
+
+  - |
+    #include <dt-bindings/clock/renesas-cpg-mssr.h>
+    #include <dt-bindings/power/r8a77990-sysc.h>
+
+    lvds0: lvds@feb90000 {
+        compatible = "renesas,r8a77990-lvds";
+        reg = <0xfeb90000 0x20>;
+        clocks = <&cpg CPG_MOD 727>,
+                 <&x13_clk>,
+                 <&extal_clk>;
+        clock-names = "fck", "dclkin.0", "extal";
+        power-domains = <&sysc R8A77990_PD_ALWAYS_ON>;
+        resets = <&cpg 727>;
+
+        renesas,companion = <&lvds1>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+                lvds0_in: endpoint {
+                    remote-endpoint = <&du_out_lvds0>;
+                };
+            };
+            port@1 {
+                reg = <1>;
+                lvds0_out: endpoint {
+                    remote-endpoint = <&panel_in1>;
+                };
+            };
+        };
+    };
+
+    lvds1: lvds@feb90100 {
+        compatible = "renesas,r8a77990-lvds";
+        reg = <0xfeb90100 0x20>;
+        clocks = <&cpg CPG_MOD 727>,
+                 <&x13_clk>,
+                 <&extal_clk>;
+        clock-names = "fck", "dclkin.0", "extal";
+        power-domains = <&sysc R8A77990_PD_ALWAYS_ON>;
+        resets = <&cpg 726>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+                lvds1_in: endpoint {
+                    remote-endpoint = <&du_out_lvds1>;
+                };
+            };
+            port@1 {
+                reg = <1>;
+                lvds1_out: endpoint {
+                    remote-endpoint = <&panel_in2>;
+                };
+            };
+        };
+    };
+
+...