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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 v7 1/3] dt-bindings: add device tree binding for Arm CryptoCell trng engine
Date: Fri, 27 Mar 2020 09:10:21 +0300
Message-ID: <1585289423-18440-2-git-send-email-hadar.gat@arm.com> (raw)
In-Reply-To: <1585289423-18440-1-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        | 54 ++++++++++++++++++++++
 1 file changed, 54 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..ca6aad1
--- /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>;
+    };
-- 
2.7.4


  reply index

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-27  6:10 [PATCH v7 0/3] hw_random: introduce Arm CryptoCell TRNG driver Hadar Gat
2020-03-27  6:10 ` Hadar Gat [this message]
2020-03-27  6:10 ` [PATCH v7 2/3] hw_random: cctrng: introduce Arm CryptoCell driver Hadar Gat
2020-03-27  6:10 ` [PATCH v7 3/3] MAINTAINERS: add HG as cctrng maintainer Hadar Gat

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