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 };
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