diff options
author | Hadar Gat <hadar.gat@arm.com> | 2020-03-27 09:10:21 +0300 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-04-16 09:49:20 +0300 |
commit | ffb57daad3a345a90543ffa1bb5e03f76b6453fb (patch) | |
tree | 9be89f8fb2a6e74f6bf3ab2c59b1d7851919d925 /Documentation/devicetree/bindings/rng/arm-cctrng.yaml | |
parent | 55b3209acbb01cb02b1ee6b1afe80d83b1aab36d (diff) | |
download | linux-ffb57daad3a345a90543ffa1bb5e03f76b6453fb.tar.xz |
dt-bindings: add device tree binding for Arm CryptoCell trng engine
The Arm CryptoCell is a hardware security engine. This patch adds DT
bindings for its TRNG (True Random Number Generator) engine.
Signed-off-by: Hadar Gat <hadar.gat@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'Documentation/devicetree/bindings/rng/arm-cctrng.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/rng/arm-cctrng.yaml | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/rng/arm-cctrng.yaml b/Documentation/devicetree/bindings/rng/arm-cctrng.yaml new file mode 100644 index 000000000000..ca6aad19b6ba --- /dev/null +++ b/Documentation/devicetree/bindings/rng/arm-cctrng.yaml @@ -0,0 +1,54 @@ +# 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) + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32-array + - items: + 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>; + }; |