dt-bindings: display: panel: Convert sitronix,st7701 to DT schema

Sitronix ST7701 based LCD panels

ST7701 designed for small and medium sizes of TFT LCD display, is

capable of supporting up to 480RGBX864 in resolution. It provides

several system interfaces like MIPI/RGB/SPI.

Techstar TS8550B is 480x854, 2-lane MIPI DSI LCD panel which has

inbuilt ST7701 chip.

Required properties:

- compatible: must be "sitronix,st7701" and one of

  * "techstar,ts8550b"

- reset-gpios: a GPIO phandle for the reset pin

Required properties for techstar,ts8550b:

- reg: DSI virtual channel used by that screen

- VCC-supply: analog regulator for MIPI circuit

- IOVCC-supply: I/O system regulator

Optional properties:

- backlight: phandle for the backlight control.

panel@0 {

	compatible = "techstar,ts8550b", "sitronix,st7701";

	reg = <0>;

	VCC-supply = <&reg_dldo2>;

	IOVCC-supply = <&reg_dldo2>;

	reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* LCD-RST: PD24 */

	backlight = <&backlight>;

};

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/display/panel/sitronix,st7701.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Sitronix ST7701 based LCD panels

maintainers:

  - Jagan Teki <jagan@amarulasolutions.com>

description: |

  ST7701 designed for small and medium sizes of TFT LCD display, is

  capable of supporting up to 480RGBX864 in resolution. It provides

  several system interfaces like MIPI/RGB/SPI.

  Techstar TS8550B is 480x854, 2-lane MIPI DSI LCD panel which has

  inbuilt ST7701 chip.

allOf:

  - $ref: panel-common.yaml#

properties:

  compatible:

    items:

      - enum:

          - techstar,ts8550b

      - const: sitronix,st7701

  reg:

    description: DSI virtual channel used by that screen

    maxItems: 1

  VCC-supply:

    description: analog regulator for MIPI circuit

  IOVCC-supply:

    description: I/O system regulator

  reset-gpios: true

  backlight: true

required:

  - compatible

  - reg

  - VCC-supply

  - IOVCC-supply

  - reset-gpios

additionalProperties: false

examples:

  - |

    #include <dt-bindings/gpio/gpio.h>

    dsi {

        #address-cells = <1>;

        #size-cells = <0>;

        panel@0 {

            compatible = "techstar,ts8550b", "sitronix,st7701";

            reg = <0>;

            VCC-supply = <&reg_dldo2>;

            IOVCC-supply = <&reg_dldo2>;

            reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* LCD-RST: PD24 */

            backlight = <&backlight>;

        };

    };