blob: c471e4c10558c605e911c8fb168c2cba1f6ba977 [file] [log] [blame]
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/rng/arm-cctrng.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Arm TrustZone CryptoCell TRNG engine
maintainers:
- Hadar Gat <hadar.gat@arm.com>
description: |+
Arm TrustZone CryptoCell TRNG (True Random Number Generator) engine.
properties:
compatible:
enum:
- arm,cryptocell-713-trng
- arm,cryptocell-703-trng
interrupts:
maxItems: 1
reg:
maxItems: 1
arm,rosc-ratio:
description:
Arm TrustZone CryptoCell TRNG engine has 4 ring oscillators.
Sampling ratio values for these 4 ring oscillators. (from calibration)
$ref: /schemas/types.yaml#/definitions/uint32-array
maxItems: 4
clocks:
maxItems: 1
required:
- compatible
- interrupts
- reg
- arm,rosc-ratio
additionalProperties: false
examples:
- |
arm_cctrng: rng@60000000 {
compatible = "arm,cryptocell-713-trng";
interrupts = <0 29 4>;
reg = <0x60000000 0x10000>;
arm,rosc-ratio = <5000 1000 500 0>;
};