xref: /freebsd-src/sys/contrib/device-tree/Bindings/clock/fixed-clock.yaml (revision 7d0873ebb83b19ba1e8a89e679470d885efe12e3)

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/clock/fixed-clock.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Simple fixed-rate clock sources

maintainers:
  - Michael Turquette <mturquette@baylibre.com>
  - Stephen Boyd <sboyd@kernel.org>

properties:
  $nodename:
    anyOf:
      - description:
          Preferred name is 'clock-<freq>' with <freq> being the output
          frequency as defined in the 'clock-frequency' property.
        pattern: "^clock-([0-9]+|[a-z0-9-]+)$"
      - description: Any name allowed
        deprecated: true

  compatible:
    const: fixed-clock

  "#clock-cells":
    const: 0

  clock-frequency: true

  clock-accuracy:
    description: accuracy of clock in ppb (parts per billion).
    $ref: /schemas/types.yaml#/definitions/uint32

  clock-output-names:
    maxItems: 1

required:
  - compatible
  - "#clock-cells"
  - clock-frequency

additionalProperties: false

examples:
  - |
    clock {
      compatible = "fixed-clock";
      #clock-cells = <0>;
      clock-frequency = <1000000000>;
      clock-accuracy = <100>;
    };
...