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# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/rng/timeriomem_rng.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: TimerIO Random Number Generator
maintainers:
- Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
properties:
compatible:
const: timeriomem_rng
period:
$ref: /schemas/types.yaml#/definitions/uint32
description: wait time in microseconds to use between samples
quality:
$ref: /schemas/types.yaml#/definitions/uint32
default: 0
description:
Estimated number of bits of true entropy per 1024 bits read from the rng.
Defaults to zero which causes the kernel's default quality to be used
instead. Note that the default quality is usually zero which disables
using this rng to automatically fill the kernel's entropy pool.
reg:
maxItems: 1
description:
Base address to sample from. Currently 'reg' must be at least four bytes
wide and 32-bit aligned.
required:
- compatible
- period
- reg
additionalProperties: false
examples:
- |
rng@44 {
compatible = "timeriomem_rng";
reg = <0x44 0x04>;
period = <1000000>;
};
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