dt-bindings: display: Convert raspberrypi,7inch-touchscreen panel to DT schema

Convert the raspberrypi,7inch-touchscreen panel binding to DT schema.

Cc: Eric Anholt <eric@anholt.net>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190705164221.4462-8-robh@kernel.org

Documentation/devicetree/bindings/display/panel/raspberrypi,7inch-touchscreen.txt

-This binding covers the official 7" (800x480) Raspberry Pi touchscreen
-panel.
-
-This DSI panel contains:
-
-- TC358762 DSI->DPI bridge
-- Atmel microcontroller on I2C for power sequencing the DSI bridge and
-  controlling backlight
-- Touchscreen controller on I2C for touch input
-
-and this binding covers the DSI display parts but not its touch input.
-
-Required properties:
-- compatible:	Must be "raspberrypi,7inch-touchscreen-panel"
-- reg:		Must be "45"
-- port:		See panel-common.txt
-
-Example:
-
-dsi1: dsi@7e700000 {
-	#address-cells = <1>;
-	#size-cells = <0>;
-	<...>
-
-	port {
-		dsi_out_port: endpoint {
-			remote-endpoint = <&panel_dsi_port>;
-		};
-	};
-};
-
-i2c_dsi: i2c {
-	compatible = "i2c-gpio";
-	#address-cells = <1>;
-	#size-cells = <0>;
-	gpios = <&gpio 28 0
-		 &gpio 29 0>;
-
-	lcd@45 {
-		compatible = "raspberrypi,7inch-touchscreen-panel";
-		reg = <0x45>;
-
-		port {
-			panel_dsi_port: endpoint {
-				remote-endpoint = <&dsi_out_port>;
-			};
-		};
-	};
-};

Documentation/devicetree/bindings/display/panel/raspberrypi,7inch-touchscreen.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/raspberrypi,7inch-touchscreen.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: The official 7" (800x480) Raspberry Pi touchscreen
+
+maintainers:
+  - Eric Anholt <eric@anholt.net>
+  - Thierry Reding <thierry.reding@gmail.com>
+
+description: |+
+  This DSI panel contains:
+
+  - TC358762 DSI->DPI bridge
+  - Atmel microcontroller on I2C for power sequencing the DSI bridge and
+    controlling backlight
+  - Touchscreen controller on I2C for touch input
+
+  and this binding covers the DSI display parts but not its touch input.
+
+properties:
+  compatible:
+    const: raspberrypi,7inch-touchscreen-panel
+
+  reg:
+    const: 0x45
+
+  port: true
+
+required:
+  - compatible
+  - reg
+  - port
+
+additionalProperties: false
+
+examples:
+  - |+
+    dsi1: dsi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      port {
+        dsi_out_port: endpoint {
+          remote-endpoint = <&panel_dsi_port>;
+        };
+      };
+    };
+
+    i2c_dsi: i2c {
+      compatible = "i2c-gpio";
+      #address-cells = <1>;
+      #size-cells = <0>;
+      scl-gpios = <&gpio 28 0>;
+      sda-gpios = <&gpio 29 0>;
+
+      lcd@45 {
+        compatible = "raspberrypi,7inch-touchscreen-panel";
+        reg = <0x45>;
+
+        port {
+          panel_dsi_port: endpoint {
+            remote-endpoint = <&dsi_out_port>;
+          };
+        };
+      };
+    };
+
+...