dt-bindings: usb: convert mediatek, musb.txt to YAML schema

MediaTek musb DRD/OTG controller

-------------------------------------------

Required properties:

 - compatible      : should be one of:

                     "mediatek,mt2701-musb"

                     ...

                     followed by "mediatek,mtk-musb"

 - reg             : specifies physical base address and size of

                     the registers

 - interrupts      : interrupt used by musb controller

 - interrupt-names : must be "mc"

 - phys            : PHY specifier for the OTG phy

 - dr_mode         : should be one of "host", "peripheral" or "otg",

                     refer to usb/generic.txt

 - clocks          : a list of phandle + clock-specifier pairs, one for

                     each entry in clock-names

 - clock-names     : must contain "main", "mcu", "univpll"

                     for clocks of controller

Optional properties:

 - power-domains   : a phandle to USB power domain node to control USB's

                     MTCMOS

Required child nodes:

 usb connector node as defined in bindings/connector/usb-connector.yaml

Optional properties:

 - id-gpios        : input GPIO for USB ID pin.

 - vbus-gpios      : input GPIO for USB VBUS pin.

 - vbus-supply     : reference to the VBUS regulator, needed when supports

                     dual-role mode

 - usb-role-switch : use USB Role Switch to support dual-role switch, see

                     usb/generic.txt.

Example:

usb2: usb@11200000 {

	compatible = "mediatek,mt2701-musb",

		     "mediatek,mtk-musb";

	reg = <0 0x11200000 0 0x1000>;

	interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;

	interrupt-names = "mc";

	phys = <&u2port2 PHY_TYPE_USB2>;

	dr_mode = "otg";

	clocks = <&pericfg CLK_PERI_USB0>,

		 <&pericfg CLK_PERI_USB0_MCU>,

		 <&pericfg CLK_PERI_USB_SLV>;

	clock-names = "main","mcu","univpll";

	power-domains = <&scpsys MT2701_POWER_DOMAIN_IFR_MSC>;

	usb-role-switch;

	connector{

		compatible = "gpio-usb-b-connector", "usb-b-connector";

		type = "micro";

		id-gpios = <&pio 44 GPIO_ACTIVE_HIGH>;

		vbus-supply = <&usb_vbus>;

	};

};

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

# Copyright (c) 2020 MediaTek

%YAML 1.2

---

$id: http://devicetree.org/schemas/usb/mediatek,musb.yaml#

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

title: MediaTek MUSB DRD/OTG Controller Device Tree Bindings

maintainers:

  - Min Guo <min.guo@mediatek.com>

properties:

  $nodename:

    pattern: '^usb@[0-9a-f]+$'

  compatible:

    items:

      - enum:

          - mediatek,mt2701-musb

      - const: mediatek,mtk-musb

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  interrupt-names:

    items:

      - const: mc

  clocks:

    items:

      - description: The main/core clock

      - description: The system bus clock

      - description: The 48Mhz clock

  clock-names:

    items:

      - const: main

      - const: mcu

      - const: univpll

  phys:

    maxItems: 1

  usb-role-switch:

    $ref: /schemas/types.yaml#/definitions/flag

    description: Support role switch. See usb/generic.txt

    type: boolean

  dr_mode:

    enum:

      - host

      - otg

      - peripheral

  power-domains:

    description: A phandle to USB power domain node to control USB's MTCMOS

    maxItems: 1

  connector:

    $ref: /connector/usb-connector.yaml#

    description: Connector for dual role switch

    type: object

dependencies:

  usb-role-switch: [ 'connector' ]

  connector: [ 'usb-role-switch' ]

required:

  - compatible

  - reg

  - interrupts

  - interrupt-names

  - phys

  - clocks

  - clock-names

additionalProperties: false

examples:

  - |

    #include <dt-bindings/clock/mt2701-clk.h>

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

    #include <dt-bindings/interrupt-controller/arm-gic.h>

    #include <dt-bindings/interrupt-controller/irq.h>

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

    #include <dt-bindings/power/mt2701-power.h>

    usb@11200000 {

        compatible = "mediatek,mt2701-musb", "mediatek,mtk-musb";

        reg = <0x11200000 0x1000>;

        interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_LOW>;

        interrupt-names = "mc";

        phys = <&u2port2 PHY_TYPE_USB2>;

        dr_mode = "otg";

        clocks = <&pericfg CLK_PERI_USB0>,

                 <&pericfg CLK_PERI_USB0_MCU>,

                 <&pericfg CLK_PERI_USB_SLV>;

        clock-names = "main","mcu","univpll";

        power-domains = <&scpsys MT2701_POWER_DOMAIN_IFR_MSC>;

        usb-role-switch;

        connector {

            compatible = "gpio-usb-b-connector", "usb-b-connector";

            type = "micro";

            id-gpios = <&pio 44 GPIO_ACTIVE_HIGH>;

            vbus-supply = <&usb_vbus>;

        };

    };

...