dt-bindings: display: Convert sgd,gktw70sdae4se panel to DT schema

Convert the sgd,gktw70sdae4se LVDS panel binding to DT schema.

Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190705164221.4462-14-robh@kernel.org

Documentation/devicetree/bindings/display/panel/sgd,gktw70sdae4se.txt

-Solomon Goldentek Display GKTW70SDAE4SE LVDS Display Panel
-==========================================================
-
-The GKTW70SDAE4SE is a 7" WVGA TFT-LCD display panel.
-
-These DT bindings follow the LVDS panel bindings defined in panel-lvds.txt
-with the following device-specific properties.
-
-Required properties:
-
-- compatible: Shall contain "sgd,gktw70sdae4se" and "panel-lvds", in that order.
-
-Example
--------
-
-panel {
-	compatible = "sgd,gktw70sdae4se", "panel-lvds";
-
-	width-mm = <153>;
-	height-mm = <86>;
-
-	data-mapping = "jeida-18";
-
-	panel-timing {
-		clock-frequency = <32000000>;
-		hactive = <800>;
-		vactive = <480>;
-		hback-porch = <39>;
-		hfront-porch = <39>;
-		vback-porch = <29>;
-		vfront-porch = <13>;
-		hsync-len = <47>;
-		vsync-len = <2>;
-	};
-
-	port {
-		panel_in: endpoint {
-			remote-endpoint = <&lvds_encoder>;
-		};
-	};
-};

Documentation/devicetree/bindings/display/panel/sgd,gktw70sdae4se.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/sgd,gktw70sdae4se.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Solomon Goldentek Display GKTW70SDAE4SE 7" WVGA LVDS Display Panel
+
+maintainers:
+  - Neil Armstrong <narmstrong@baylibre.com>
+  - Thierry Reding <thierry.reding@gmail.com>
+
+allOf:
+  - $ref: lvds.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: sgd,gktw70sdae4se
+      - {} # panel-lvds, but not listed here to avoid false select
+
+  data-mapping:
+    const: jeida-18
+
+  width-mm:
+    const: 153
+
+  height-mm:
+    const: 86
+
+  panel-timing: true
+  port: true
+
+additionalProperties: false
+
+required:
+  - compatible
+
+examples:
+  - |+
+    panel {
+      compatible = "sgd,gktw70sdae4se", "panel-lvds";
+
+      width-mm = <153>;
+      height-mm = <86>;
+
+      data-mapping = "jeida-18";
+
+      panel-timing {
+        clock-frequency = <32000000>;
+        hactive = <800>;
+        vactive = <480>;
+        hback-porch = <39>;
+        hfront-porch = <39>;
+        vback-porch = <29>;
+        vfront-porch = <13>;
+        hsync-len = <47>;
+        vsync-len = <2>;
+      };
+
+      port {
+        panel_in: endpoint {
+          remote-endpoint = <&lvds_encoder>;
+        };
+      };
+    };
+
+...