Documentation/devicetree/bindings/phy/phy-stm32-usbphyc.yaml


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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/phy/phy-stm32-usbphyc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: STMicroelectronics STM32 USB HS PHY controller binding

description:

  The STM32 USBPHYC block contains a dual port High Speed UTMI+ PHY and a UTMI
  switch. It controls PHY configuration and status, and the UTMI+ switch that
  selects either OTG or HOST controller for the second PHY port. It also sets
  PLL configuration.

  USBPHYC
  |_ PLL
  |
  |_ PHY port#1 _________________ HOST controller
  |                   __                 |
  |                  / 1|________________|
  |_ PHY port#2 ----|   |________________
  |                  \_0|                |
  |_ UTMI switch_______|          OTG controller

maintainers:
  - Amelie Delaunay <amelie.delaunay@st.com>

properties:
  compatible:
    const: st,stm32mp1-usbphyc

  reg:
    maxItems: 1

  clocks:
    maxItems: 1

  resets:
    maxItems: 1

  "#address-cells":
    const: 1

  "#size-cells":
    const: 0

  vdda1v1-supply:
    description: regulator providing 1V1 power supply to the PLL block

  vdda1v8-supply:
    description: regulator providing 1V8 power supply to the PLL block

#Required child nodes:

patternProperties:
  "^usb-phy@[0|1]$":
    type: object
    description:
      Each port the controller provides must be represented as a sub-node.

    properties:
      reg:
        description: phy port index.
        maxItems: 1

      phy-supply:
        description: regulator providing 3V3 power supply to the PHY.

      "#phy-cells":
        enum: [ 0x0, 0x1 ]

    allOf:
      - if:
          properties:
            reg:
              const: 0
        then:
          properties:
            "#phy-cells":
              const: 0
        else:
          properties:
            "#phy-cells":
              const: 1
              description:
                The value is used to select UTMI switch output.
                0 for OTG controller and 1 for Host controller.

    required:
      - reg
      - phy-supply
      - "#phy-cells"

    additionalProperties: false

required:
  - compatible
  - reg
  - clocks
  - "#address-cells"
  - "#size-cells"
  - vdda1v1-supply
  - vdda1v8-supply
  - usb-phy@0
  - usb-phy@1

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/stm32mp1-clks.h>
    #include <dt-bindings/reset/stm32mp1-resets.h>
    usbphyc: usbphyc@5a006000 {
        compatible = "st,stm32mp1-usbphyc";
        reg = <0x5a006000 0x1000>;
        clocks = <&rcc USBPHY_K>;
        resets = <&rcc USBPHY_R>;
        vdda1v1-supply = <&reg11>;
        vdda1v8-supply = <&reg18>;
        #address-cells = <1>;
        #size-cells = <0>;

        usbphyc_port0: usb-phy@0 {
            reg = <0>;
            phy-supply = <&vdd_usb>;
            #phy-cells = <0>;
        };

        usbphyc_port1: usb-phy@1 {
            reg = <1>;
            phy-supply = <&vdd_usb>;
            #phy-cells = <1>;
        };
    };
...