xref: /linux/Documentation/devicetree/bindings/clock/ti/ti,apll-clock.yaml (revision 502d45774af09f1c681c754c4b7cdfb5d7f72fd9)

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

title: Texas Instruments APLL clock

maintainers:
  - Eduard Bostina <egbostina@gmail.com>

allOf:
  - $ref: /schemas/clock/clock.yaml#

description:
  This binding assumes a register-mapped APLL with usually two selectable
  input clocks (reference clock and bypass clock), with analog phase locked
  loop logic for multiplying the input clock to a desired output clock.
  This clock also typically supports different operation modes (locked, low
  power stop etc.) APLL mostly behaves like a subtype of a DPLL, although
  a simplified one at that.

properties:
  compatible:
    enum:
      - ti,dra7-apll-clock
      - ti,omap2-apll-clock

  "#clock-cells":
    const: 0

  clocks:
    minItems: 1
    maxItems: 2
    description: Link phandles of parent clocks (clk-ref and clk-bypass)

  reg:
    minItems: 2
    maxItems: 3
    description: |
      Address and length of the register set for controlling the APLL.
      It contains the information of registers in the following order:
      "control" - contains the control register offset
      "idlest" - contains the idlest register offset
      "autoidle" - contains the autoidle register offset (OMAP2 only)

  ti,clock-frequency:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: static clock frequency for the clock (OMAP2 only)

  ti,idlest-shift:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: bit-shift for the idlest field (OMAP2 only)

  ti,bit-shift:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: bit-shift for enable and autoidle fields (OMAP2 only)

required:
  - compatible
  - "#clock-cells"
  - clocks
  - reg

unevaluatedProperties: false

examples:
  - |
    bus {
        #address-cells = <1>;
        #size-cells = <0>;

        clock@21c {
            #clock-cells = <0>;
            compatible = "ti,dra7-apll-clock";
            clocks = <&apll_pcie_in_clk_mux>, <&dpll_pcie_ref_ck>;
            reg = <0x021c>, <0x0220>;
        };

        clock@500 {
            #clock-cells = <0>;
            compatible = "ti,omap2-apll-clock";
            clocks = <&sys_ck>;
            ti,bit-shift = <2>;
            ti,idlest-shift = <8>;
            ti,clock-frequency = <96000000>;
            reg = <0x0500>, <0x0530>, <0x0520>;
        };
    };