xref: /kernel/linux/linux-6.6/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/phy/samsung,usb3-drd-phy.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Samsung Exynos SoC USB 3.0 DRD PHY USB 2.0 PHY

maintainers:
  - Krzysztof Kozlowski <krzk@kernel.org>
  - Marek Szyprowski <m.szyprowski@samsung.com>
  - Sylwester Nawrocki <s.nawrocki@samsung.com>

description: |
  For samsung,exynos5250-usbdrd-phy and samsung,exynos5420-usbdrd-phy
  compatible PHYs, the second cell in the PHY specifier identifies the
  PHY id, which is interpreted as follows::
    0 - UTMI+ type phy,
    1 - PIPE3 type phy.

  For SoCs like Exynos5420 having multiple USB 3.0 DRD PHY controllers,
  'usbdrd_phy' nodes should have numbered alias in the aliases node, in the
  form of usbdrdphyN, N = 0, 1... (depending on number of controllers).

properties:
  compatible:
    enum:
      - samsung,exynos5250-usbdrd-phy
      - samsung,exynos5420-usbdrd-phy
      - samsung,exynos5433-usbdrd-phy
      - samsung,exynos7-usbdrd-phy
      - samsung,exynos850-usbdrd-phy

  clocks:
    minItems: 2
    maxItems: 5

  clock-names:
    minItems: 2
    maxItems: 5
    description: |
      At least two clocks::
        - Main PHY clock (same as USB DRD controller i.e. DWC3 IP clock), used
          for register access.
        - PHY reference clock (usually crystal clock), used for PHY operations,
          associated by phy name. It is used to determine bit values for clock
          settings register.  For Exynos5420 this is given as 'sclk_usbphy30'
          in the CMU.

  "#phy-cells":
    const: 1

  port:
    $ref: /schemas/graph.yaml#/properties/port
    description:
      Any connector to the data bus of this controller should be modelled using
      the OF graph bindings specified.

  reg:
    maxItems: 1

  samsung,pmu-syscon:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      Phandle to PMU system controller interface.

  vbus-supply:
    description:
      VBUS power source.

  vbus-boost-supply:
    description:
      VBUS Boost 5V power source.

required:
  - compatible
  - clocks
  - clock-names
  - "#phy-cells"
  - reg
  - samsung,pmu-syscon

allOf:
  - if:
      properties:
        compatible:
          contains:
            enum:
              - samsung,exynos5433-usbdrd-phy
              - samsung,exynos7-usbdrd-phy
    then:
      properties:
        clocks:
          minItems: 5
          maxItems: 5
        clock-names:
          items:
            - const: phy
            - const: ref
            - const: phy_utmi
            - const: phy_pipe
            - const: itp
    else:
      properties:
        clocks:
          minItems: 2
          maxItems: 2
        clock-names:
          items:
            - const: phy
            - const: ref

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/exynos5420.h>

    phy@12100000 {
        compatible = "samsung,exynos5420-usbdrd-phy";
        reg = <0x12100000 0x100>;
        #phy-cells = <1>;
        clocks = <&clock CLK_USBD300>, <&clock CLK_SCLK_USBPHY300>;
        clock-names = "phy", "ref";
        samsung,pmu-syscon = <&pmu_system_controller>;
        vbus-supply = <&usb300_vbus_reg>;
    };