dt-bindings: display: panel: Add Novatek NT36523 bindings

Novatek NT36523 is a display driver IC used to drive DSI panels.
Signed-off-by: Jianhua Lu <lujianhua000@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230313101858.14611-1-lujianhua000@gmail.com

Documentation/devicetree/bindings/display/panel/novatek,nt36523.yaml

+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/novatek,nt36523.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Novatek NT36523 based DSI display Panels
+
+maintainers:
+  - Jianhua Lu <lujianhua000@gmail.com>
+
+description: |
+  The Novatek NT36523 is a generic DSI Panel IC used to drive dsi
+  panels. Support video mode panels from China Star Optoelectronics
+  Technology (CSOT) and BOE Technology.
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - xiaomi,elish-boe-nt36523
+          - xiaomi,elish-csot-nt36523
+      - const: novatek,nt36523
+
+  reset-gpios:
+    maxItems: 1
+    description: phandle of gpio for reset line - This should be 8mA
+
+  vddio-supply:
+    description: regulator that supplies the I/O voltage
+
+  reg: true
+  ports: true
+  backlight: true
+
+required:
+  - compatible
+  - reg
+  - vddio-supply
+  - reset-gpios
+  - ports
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "xiaomi,elish-csot-nt36523", "novatek,nt36523";
+            reg = <0>;
+
+            vddio-supply = <&vreg_l14a_1p88>;
+            reset-gpios = <&tlmm 75 GPIO_ACTIVE_LOW>;
+            backlight = <&backlight>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+                    panel_in_0: endpoint {
+                        remote-endpoint = <&dsi0_out>;
+                    };
+                };
+
+                port@1{
+                    reg = <1>;
+                    panel_in_1: endpoint {
+                        remote-endpoint = <&dsi1_out>;
+                    };
+                };
+            };
+        };
+    };
+
+...