Documentation/devicetree/bindings/phy/samsung,ufs-phy.yaml

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

title: Samsung SoC series UFS PHY

maintainers:
  - Alim Akhtar <alim.akhtar@samsung.com>

properties:
  "#phy-cells":
    const: 0

  compatible:
    enum:
      - samsung,exynos7-ufs-phy
      - samsung,exynosautov9-ufs-phy
      - tesla,fsd-ufs-phy

  reg:
    maxItems: 1

  reg-names:
    items:
      - const: phy-pma

  clocks:
    minItems: 1
    maxItems: 4

  clock-names:
    minItems: 1
    maxItems: 4

  samsung,pmu-syscon:
    $ref: '/schemas/types.yaml#/definitions/phandle-array'
    maxItems: 1
    items:
      minItems: 1
      items:
        - description: phandle for PMU system controller interface, used to
                       control pmu registers bits for ufs m-phy
        - description: offset of the pmu control register
    description:
      It can be phandle/offset pair. The second cell which can represent an
      offset is optional.

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

allOf:
  - if:
      properties:
        compatible:
          contains:
            const: samsung,exynos7-ufs-phy

    then:
      properties:
        clocks:
          items:
            - description: PLL reference clock
            - description: symbol clock for input symbol (rx0-ch0 symbol clock)
            - description: symbol clock for input symbol (rx1-ch1 symbol clock)
            - description: symbol clock for output symbol (tx0 symbol clock)

        clock-names:
          items:
            - const: ref_clk
            - const: rx1_symbol_clk
            - const: rx0_symbol_clk
            - const: tx0_symbol_clk

    else:
      properties:
        clocks:
          items:
            - description: PLL reference clock

        clock-names:
          items:
            - const: ref_clk

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/exynos7-clk.h>

    ufs_phy: ufs-phy@15571800 {
        compatible = "samsung,exynos7-ufs-phy";
        reg = <0x15571800 0x240>;
        reg-names = "phy-pma";
        samsung,pmu-syscon = <&pmu_system_controller>;
        #phy-cells = <0>;
        clocks = <&clock_fsys1 SCLK_COMBO_PHY_EMBEDDED_26M>,
                 <&clock_fsys1 PHYCLK_UFS20_RX1_SYMBOL_USER>,
                 <&clock_fsys1 PHYCLK_UFS20_RX0_SYMBOL_USER>,
                 <&clock_fsys1 PHYCLK_UFS20_TX0_SYMBOL_USER>;
        clock-names = "ref_clk", "rx1_symbol_clk",
                      "rx0_symbol_clk", "tx0_symbol_clk";

    };
...