Documentation/devicetree/bindings/clock/fixed-mmio-clock.yaml

   1 # SPDX-License-Identifier: GPL-2.0
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/clock/fixed-mmio-clock.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Binding for simple memory mapped IO fixed-rate clock sources
   8
   9 description:
  10   This binding describes a fixed-rate clock for which the frequency can
  11   be read from a single 32-bit memory mapped I/O register.
  12
  13   It was designed for test systems, like FPGA, not for complete,
  14   finished SoCs.
  15
  16 maintainers:
  17   - Jan Kotas <jank@cadence.com>
  18
  19 properties:
  20   compatible:
  21     const: fixed-mmio-clock
  22
  23   reg:
  24     maxItems: 1
  25
  26   "#clock-cells":
  27     const: 0
  28
  29   clock-output-names:
  30     maxItems: 1
  31
  32 required:
  33   - compatible
  34   - reg
  35   - "#clock-cells"
  36
  37 additionalProperties: false
  38
  39 examples:
  40   - |
  41     sysclock: sysclock@fd020004 {
  42       compatible = "fixed-mmio-clock";
  43       #clock-cells = <0>;
  44       reg = <0xfd020004 0x4>;
  45       clock-output-names = "sysclk";
  46     };
  47 ...