Documentation/devicetree/bindings/rng/timeriomem_rng.yaml

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/rng/timeriomem_rng.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: TimerIO Random Number Generator
   8
   9 maintainers:
  10   - Krzysztof Kozlowski <krzk@kernel.org>
  11
  12 properties:
  13   compatible:
  14     const: timeriomem_rng
  15
  16   period:
  17     $ref: /schemas/types.yaml#/definitions/uint32
  18     description: wait time in microseconds to use between samples
  19
  20   quality:
  21     $ref: /schemas/types.yaml#/definitions/uint32
  22     default: 0
  23     description:
  24       Estimated number of bits of true entropy per 1024 bits read from the rng.
  25       Defaults to zero which causes the kernel's default quality to be used
  26       instead.  Note that the default quality is usually zero which disables
  27       using this rng to automatically fill the kernel's entropy pool.
  28
  29   reg:
  30     maxItems: 1
  31     description:
  32       Base address to sample from. Currently 'reg' must be at least four bytes
  33       wide and 32-bit aligned.
  34
  35 required:
  36   - compatible
  37   - period
  38   - reg
  39
  40 additionalProperties: false
  41
  42 examples:
  43   - |
  44     rng@44 {
  45         compatible = "timeriomem_rng";
  46         reg = <0x44 0x04>;
  47         period = <1000000>;
  48     };