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 7title: TimerIO Random Number Generator 8 9maintainers: 10 - Krzysztof Kozlowski <krzk@kernel.org> 11 12properties: 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 35required: 36 - compatible 37 - period 38 - reg 39 40additionalProperties: false 41 42examples: 43 - | 44 rng@44 { 45 compatible = "timeriomem_rng"; 46 reg = <0x44 0x04>; 47 period = <1000000>; 48 }; 49