xref: /linux/Documentation/devicetree/bindings/rng/arm-cctrng.yaml (revision 07c7b547a79605f1041d55b84d91a4a4d9c5b363) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/rng/arm-cctrng.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Arm TrustZone CryptoCell TRNG engine
8
9maintainers:
10  - Hadar Gat <hadar.gat@arm.com>
11
12description: |+
13  Arm TrustZone CryptoCell TRNG (True Random Number Generator) engine.
14
15properties:
16  compatible:
17    enum:
18      - arm,cryptocell-713-trng
19      - arm,cryptocell-703-trng
20
21  interrupts:
22    maxItems: 1
23
24  reg:
25    maxItems: 1
26
27  arm,rosc-ratio:
28    description:
29      Arm TrustZone CryptoCell TRNG engine has 4 ring oscillators.
30      Sampling ratio values for these 4 ring oscillators. (from calibration)
31    $ref: /schemas/types.yaml#/definitions/uint32-array
32    maxItems: 4
33
34  clocks:
35    maxItems: 1
36
37required:
38  - compatible
39  - interrupts
40  - reg
41  - arm,rosc-ratio
42
43additionalProperties: false
44
45examples:
46  - |
47    arm_cctrng: rng@60000000 {
48        compatible = "arm,cryptocell-713-trng";
49        interrupts = <0 29 4>;
50        reg = <0x60000000 0x10000>;
51        arm,rosc-ratio = <5000 1000 500 0>;
52    };
53