dt-bindings: display: convert samsung,s6d16d0 to DT Schema

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200408195109.32692-22-sam@ravnborg.org

Documentation/devicetree/bindings/display/panel/samsung,s6d16d0.txt

-Samsung S6D16D0 4" 864x480 AMOLED panel
-
-Required properties:
-  - compatible: should be:
-    "samsung,s6d16d0",
-  - reg: the virtual channel number of a DSI peripheral
-  - vdd1-supply: I/O voltage supply
-  - reset-gpios: a GPIO spec for the reset pin (active low)
-
-The device node can contain one 'port' child node with one child
-'endpoint' node, according to the bindings defined in
-media/video-interfaces.txt. This node should describe panel's video bus.
-
-Example:
-&dsi {
-	...
-
-	panel@0 {
-		compatible = "samsung,s6d16d0";
-		reg = <0>;
-		vdd1-supply = <&foo>;
-		reset-gpios = <&foo_gpio 0 GPIO_ACTIVE_LOW>;
-
-		port {
-			panel_in: endpoint {
-				remote-endpoint = <&dsi_out>;
-			};
-		};
-	};
-};

Documentation/devicetree/bindings/display/panel/samsung,s6d16d0.yaml

+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/samsung,s6d16d0.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung S6D16D0 4" 864x480 AMOLED panel
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: samsung,s6d16d0
+
+  port: true
+  reg: true
+  reset-gpios: true
+
+  vdd1-supply:
+    description: I/O voltage supply
+
+required:
+  - compatible
+  - reg
+  - vdd1-supply
+  - reset-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "samsung,s6d16d0";
+            reg = <0>;
+            vdd1-supply = <&foo>;
+            reset-gpios = <&foo_gpio 0 GPIO_ACTIVE_LOW>;
+
+            port {
+                panel_in: endpoint {
+                    remote-endpoint = <&dsi_out>;
+                };
+            };
+        };
+    };
+
+...