arm-cctrng.yaml

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    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 
    7 title: Arm TrustZone CryptoCell TRNG engine
    8 
    9 maintainers:
   10   - Hadar Gat <hadar.gat@arm.com>
   11 
   12 description: |+
   13   Arm TrustZone CryptoCell TRNG (True Random Number Generator) engine.
   14 
   15 properties:
   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 
   37 required:
   38   - compatible
   39   - interrupts
   40   - reg
   41   - arm,rosc-ratio
   42 
   43 additionalProperties: false
   44 
   45 examples:
   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     };

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sys/contrib/device-tree/Bindings/rng/arm-cctrng.yaml