From: Hadar Gat <hadar.gat@arm.com>
To: Matt Mackall <mpm@selenic.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Krzysztof Kozlowski <krzk@kernel.org>,
Florian Fainelli <f.fainelli@gmail.com>,
Alexander Sverdlin <alexander.sverdlin@nokia.com>,
Thomas Gleixner <tglx@linutronix.de>,
Tomer Maimon <tmaimon77@gmail.com>,
Randy Dunlap <rdunlap@infradead.org>,
Zaibo Xu <xuzaibo@huawei.com>,
Daniel Thompson <daniel.thompson@linaro.org>,
Mauro Carvalho Chehab <mchehab+samsung@kernel.org>,
"David S. Miller" <davem@davemloft.net>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: linux-crypto@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Gilad Ben-Yossef <gilad@benyossef.com>,
Ofir Drang <ofir.drang@arm.com>, Hadar Gat <hadar.gat@arm.com>
Subject: [PATCH v6 1/3] dt-bindings: add device tree binding for Arm CryptoCell trng engine
Date: Wed, 25 Mar 2020 07:41:09 +0200 [thread overview]
Message-ID: <1585114871-6912-2-git-send-email-hadar.gat@arm.com> (raw)
In-Reply-To: <1585114871-6912-1-git-send-email-hadar.gat@arm.com>
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>
---
.../devicetree/bindings/rng/arm-cctrng.yaml | 55 ++++++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 Documentation/devicetree/bindings/rng/arm-cctrng.yaml
diff --git a/Documentation/devicetree/bindings/rng/arm-cctrng.yaml b/Documentation/devicetree/bindings/rng/arm-cctrng.yaml
new file mode 100644
index 0000000..7f70e4b
--- /dev/null
+++ b/Documentation/devicetree/bindings/rng/arm-cctrng.yaml
@@ -0,0 +1,55 @@
+# 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:
+ minItems: 4
+ 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>;
+ };
--
2.7.4
next prev parent reply other threads:[~2020-03-25 5:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-25 5:41 [PATCH v6 0/3] hw_random: introduce Arm CryptoCell TRNG driver Hadar Gat
2020-03-25 5:41 ` Hadar Gat [this message]
2020-03-26 19:41 ` [PATCH v6 1/3] dt-bindings: add device tree binding for Arm CryptoCell trng engine Rob Herring
2020-03-26 21:04 ` Hadar Gat
2020-03-27 3:04 ` Rob Herring
2020-03-25 5:41 ` [PATCH v6 2/3] hw_random: cctrng: introduce Arm CryptoCell driver Hadar Gat
2020-03-25 5:41 ` [PATCH v6 3/3] MAINTAINERS: add HG as cctrng maintainer Hadar Gat
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