dt-bindings: display: convert boe,himax8279d to DT Schema

v2:
- Fix entry in MAINTAINERS

v3:
- Fix panel@0 in example (Rob)

Signed-off-by: Sam Ravnborg <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
Cc: Jerry Han <[e-mail]>
Cc: Thierry Reding <[e-mail]>
Cc: Sam Ravnborg <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/devicetree/bindings/display/panel/boe,himax8279d.txt

···
-Boe Himax8279d 1200x1920 TFT LCD panel
-
-Required properties:
-- compatible: should be "boe,himax8279d8p" and one of: "boe,himax8279d10p"
-- reg: DSI virtual channel of the peripheral
-- enable-gpios: panel enable gpio
-- pp33-gpios: a GPIO phandle for the 3.3v pin that provides the supply voltage
-- pp18-gpios: a GPIO phandle for the 1.8v pin that provides the supply voltage
-
-Optional properties:
-- backlight: phandle of the backlight device attached to the panel
-
-Example:
-
-	&mipi_dsi {
-		panel {
-			compatible = "boe,himax8279d8p", "boe,himax8279d10p";
-			reg = <0>;
-			backlight = <&backlight>;
-			enable-gpios = <&gpio 45 GPIO_ACTIVE_HIGH>;
-			pp33-gpios = <&gpio 35 GPIO_ACTIVE_HIGH>;
-			pp18-gpios = <&gpio 36 GPIO_ACTIVE_HIGH>;
-		};
-	};

Documentation/devicetree/bindings/display/panel/boe,himax8279d.yaml

···
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/boe,himax8279d.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Boe Himax8279d 1200x1920 TFT LCD panel
+
+maintainers:
+  - Jerry Han <[e-mail]>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: boe,himax8279d8p
+      - const: boe,himax8279d10p
+
+  backlight: true
+  enable-gpios: true
+  reg: true
+
+  pp33-gpios:
+    maxItems: 1
+    description: GPIO for the 3.3v pin that provides the supply voltage
+
+  pp18-gpios:
+    maxItems: 1
+    description: GPIO for the 1.8v pin that provides the supply voltage
+
+required:
+  - compatible
+  - reg
+  - enable-gpios
+  - pp33-gpios
+  - pp18-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        panel@0 {
+            compatible = "boe,himax8279d8p", "boe,himax8279d10p";
+            reg = <0>;
+            backlight = <&backlight>;
+            enable-gpios = <&gpio 45 GPIO_ACTIVE_HIGH>;
+            pp33-gpios = <&gpio 35 GPIO_ACTIVE_HIGH>;
+            pp18-gpios = <&gpio 36 GPIO_ACTIVE_HIGH>;
+        };
+    };
+
+...

MAINTAINERS

···
 M:	Jerry Han <[e-mail]>
 S:	Maintained
 F:	drivers/gpu/drm/panel/panel-boe-himax8279d.c
-F:	Documentation/devicetree/bindings/display/panel/boe,himax8279d.txt
+F:	Documentation/devicetree/bindings/display/panel/boe,himax8279d.yaml
 
 DRM DRIVER FOR FARADAY TVE200 TV ENCODER
 M:	Linus Walleij <[e-mail]>