162306a36Sopenharmony_ci# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 262306a36Sopenharmony_ci%YAML 1.2 362306a36Sopenharmony_ci--- 462306a36Sopenharmony_ci$id: http://devicetree.org/schemas/rng/arm-cctrng.yaml# 562306a36Sopenharmony_ci$schema: http://devicetree.org/meta-schemas/core.yaml# 662306a36Sopenharmony_ci 762306a36Sopenharmony_cititle: Arm TrustZone CryptoCell TRNG engine 862306a36Sopenharmony_ci 962306a36Sopenharmony_cimaintainers: 1062306a36Sopenharmony_ci - Hadar Gat <hadar.gat@arm.com> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_cidescription: |+ 1362306a36Sopenharmony_ci Arm TrustZone CryptoCell TRNG (True Random Number Generator) engine. 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ciproperties: 1662306a36Sopenharmony_ci compatible: 1762306a36Sopenharmony_ci enum: 1862306a36Sopenharmony_ci - arm,cryptocell-713-trng 1962306a36Sopenharmony_ci - arm,cryptocell-703-trng 2062306a36Sopenharmony_ci 2162306a36Sopenharmony_ci interrupts: 2262306a36Sopenharmony_ci maxItems: 1 2362306a36Sopenharmony_ci 2462306a36Sopenharmony_ci reg: 2562306a36Sopenharmony_ci maxItems: 1 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci arm,rosc-ratio: 2862306a36Sopenharmony_ci description: 2962306a36Sopenharmony_ci Arm TrustZone CryptoCell TRNG engine has 4 ring oscillators. 3062306a36Sopenharmony_ci Sampling ratio values for these 4 ring oscillators. (from calibration) 3162306a36Sopenharmony_ci $ref: /schemas/types.yaml#/definitions/uint32-array 3262306a36Sopenharmony_ci maxItems: 4 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci clocks: 3562306a36Sopenharmony_ci maxItems: 1 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_cirequired: 3862306a36Sopenharmony_ci - compatible 3962306a36Sopenharmony_ci - interrupts 4062306a36Sopenharmony_ci - reg 4162306a36Sopenharmony_ci - arm,rosc-ratio 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_ciadditionalProperties: false 4462306a36Sopenharmony_ci 4562306a36Sopenharmony_ciexamples: 4662306a36Sopenharmony_ci - | 4762306a36Sopenharmony_ci arm_cctrng: rng@60000000 { 4862306a36Sopenharmony_ci compatible = "arm,cryptocell-713-trng"; 4962306a36Sopenharmony_ci interrupts = <0 29 4>; 5062306a36Sopenharmony_ci reg = <0x60000000 0x10000>; 5162306a36Sopenharmony_ci arm,rosc-ratio = <5000 1000 500 0>; 5262306a36Sopenharmony_ci }; 53