linux/Documentation/devicetree/bindings/clock/fsl,qoriq-clock.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/clock/fsl,qoriq-clock.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Clock Block on Freescale QorIQ Platforms

maintainers:
  - Frank Li <Frank.Li@nxp.com>

description: |
  Freescale QorIQ chips take primary clocking input from the external
  SYSCLK signal. The SYSCLK input (frequency) is multiplied using
  multiple phase locked loops (PLL) to create a variety of frequencies
  which can then be passed to a variety of internal logic, including
  cores and peripheral IP blocks.
  Please refer to the Reference Manual for details.

  All references to "1.0" and "2.0" refer to the QorIQ chassis version to
  which the chip complies.

  Chassis Version    Example Chips
  ---------------    -------------
       1.0          p4080, p5020, p5040
       2.0          t4240

  Clock Provider

  The clockgen node should act as a clock provider, though in older device
  trees the children of the clockgen node are the clock providers.  

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - fsl,p2041-clockgen
              - fsl,p3041-clockgen
              - fsl,p4080-clockgen
              - fsl,p5020-clockgen
              - fsl,p5040-clockgen
          - const: fsl,qoriq-clockgen-1.0
      - items:
          - enum:
              - fsl,t1023-clockgen
              - fsl,t1024-clockgen
              - fsl,t1040-clockgen
              - fsl,t1042-clockgen
              - fsl,t2080-clockgen
              - fsl,t2081-clockgen
              - fsl,t4240-clockgen
          - const: fsl,qoriq-clockgen-2.0
      - items:
          - enum:
              - fsl,b4420-clockgen
              - fsl,b4860-clockgen
          - const: fsl,b4-clockgen
      - items:
          - enum:
              - fsl,ls1012a-clockgen
              - fsl,ls1021a-clockgen
              - fsl,ls1028a-clockgen
              - fsl,ls1043a-clockgen
              - fsl,ls1046a-clockgen
              - fsl,ls1088a-clockgen
              - fsl,ls2080a-clockgen
              - fsl,lx2160a-clockgen

  reg:
    maxItems: 1

  ranges: true

  '#address-cells':
    const: 1

  '#size-cells':
    const: 1

  '#clock-cells':
    const: 2
    description: |
      The first cell of the clock specifier is the clock type, and the
      second cell is the clock index for the specified type.

        Type#  Name       Index Cell
        0  sysclk          must be 0
        1  cmux            index (n in CLKCnCSR)
        2  hwaccel         index (n in CLKCGnHWACSR)
        3  fman            0 for fm1, 1 for fm2
        4  platform pll    n=pll/(n+1). For example, when n=1,
                          that means output_freq=PLL_freq/2.
        5  coreclk         must be 0      

  clock-frequency:
    description: Input system clock frequency (SYSCLK)

  clocks:
    items:
      - description:
          sysclk may be provided as an input clock.  Either clock-frequency
          or clocks must be provided.
      - description:
          A second input clock, called "coreclk", may be provided if
          core PLLs are based on a different input clock from the
          platform PLL.
    minItems: 1

  clock-names:
    items:
      - const: sysclk
      - const: coreclk

patternProperties:
  '^mux[0-9]@[a-f0-9]+$':
    deprecated: true
    $ref: fsl,qoriq-clock-legacy.yaml

  '^sysclk(-[a-z0-9]+)?$':
    deprecated: true
    $ref: fsl,qoriq-clock-legacy.yaml

  '^pll[0-9]@[a-f0-9]+$':
    deprecated: true
    $ref: fsl,qoriq-clock-legacy.yaml

  '^platform\-pll@[a-f0-9]+$':
    deprecated: true
    $ref: fsl,qoriq-clock-legacy.yaml

required:
  - compatible
  - reg
  - '#clock-cells'

additionalProperties: false

examples:
  - |
    /* clock provider example */
    global-utilities@e1000 {
        compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0";
        reg = <0xe1000 0x1000>;
        clock-frequency = <133333333>;
        #clock-cells = <2>;
    };    

  - |
    /* Legacy example */
    global-utilities@e1000 {
        compatible = "fsl,p5020-clockgen", "fsl,qoriq-clockgen-1.0";
        reg = <0xe1000 0x1000>;
        ranges = <0x0 0xe1000 0x1000>;
        clock-frequency = <133333333>;
        #address-cells = <1>;
        #size-cells = <1>;
        #clock-cells = <2>;

        sysclk: sysclk {
            compatible = "fsl,qoriq-sysclk-1.0";
            clock-output-names = "sysclk";
            #clock-cells = <0>;
        };

        pll0: pll0@800 {
            compatible = "fsl,qoriq-core-pll-1.0";
            reg = <0x800 0x4>;
            #clock-cells = <1>;
            clocks = <&sysclk>;
            clock-output-names = "pll0", "pll0-div2";
        };

        pll1: pll1@820 {
            compatible = "fsl,qoriq-core-pll-1.0";
            reg = <0x820 0x4>;
            #clock-cells = <1>;
            clocks = <&sysclk>;
            clock-output-names = "pll1", "pll1-div2";
        };

        mux0: mux0@0 {
            compatible = "fsl,qoriq-core-mux-1.0";
            reg = <0x0 0x4>;
            #clock-cells = <0>;
            clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
            clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
            clock-output-names = "cmux0";
        };

        mux1: mux1@20 {
            compatible = "fsl,qoriq-core-mux-1.0";
            reg = <0x20 0x4>;
            #clock-cells = <0>;
            clocks = <&pll0 0>, <&pll0 1>, <&pll1 0>, <&pll1 1>;
            clock-names = "pll0", "pll0-div2", "pll1", "pll1-div2";
            clock-output-names = "cmux1";
        };

        platform-pll@c00 {
            #clock-cells = <1>;
            reg = <0xc00 0x4>;
            compatible = "fsl,qoriq-platform-pll-1.0";
            clocks = <&sysclk>;
            clock-output-names = "platform-pll", "platform-pll-div2";
        };
    };