From patchwork Sun Feb 2 13:26:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hadar Gat X-Patchwork-Id: 198152 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B01CC3524A for ; Sun, 2 Feb 2020 13:27:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 299CC2067C for ; Sun, 2 Feb 2020 13:27:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726916AbgBBN1v (ORCPT ); Sun, 2 Feb 2020 08:27:51 -0500 Received: from foss.arm.com ([217.140.110.172]:46166 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726836AbgBBN1v (ORCPT ); Sun, 2 Feb 2020 08:27:51 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 780F430E; Sun, 2 Feb 2020 05:27:50 -0800 (PST) Received: from ssg-dev-vb.kfn.arm.com (E111385.Arm.com [10.50.4.77]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 62BC03F52E; Sun, 2 Feb 2020 05:27:46 -0800 (PST) From: Hadar Gat To: Matt Mackall , Herbert Xu , Rob Herring , Mark Rutland , Arnd Bergmann , Greg Kroah-Hartman , Krzysztof Kozlowski , Daniel Thompson , Tomer Maimon , Stefan Wahren , Sumit Garg , Zaibo Xu , Weili Qian , Mauro Carvalho Chehab , "David S. Miller" , Jonathan Cameron Cc: linux-crypto@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Gilad Ben-Yossef , Ofir Drang , Hadar Gat Subject: [PATCH v2 1/3] dt-bindings: add device tree binding for Arm CryptoCell trng engine Date: Sun, 2 Feb 2020 15:26:59 +0200 Message-Id: <1580650021-8578-2-git-send-email-hadar.gat@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1580650021-8578-1-git-send-email-hadar.gat@arm.com> References: <1580650021-8578-1-git-send-email-hadar.gat@arm.com> Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org 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 --- .../devicetree/bindings/rng/arm-cctrng.yaml | 51 ++++++++++++++++++++++ 1 file changed, 51 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..fe9422e --- /dev/null +++ b/Documentation/devicetree/bindings/rng/arm-cctrng.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rng/arm-cctrng.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Arm ZrustZone CryptoCell TRNG engine + +maintainers: + - Hadar Gat + +description: |+ + Arm ZrustZone CryptoCell TRNG (True Random Number Generator) engine. + +properties: + compatible: + description: Should be "arm,cryptocell-7x3-trng" + const: arm,cryptocell-7x3-trng + + interrupts: + description: Interrupt number for the device. + maxItems: 1 + + reg: + description: Base physical address of the engine and length of memory + mapped region. + maxItems: 1 + + rosc-ratio: + description: Sampling ratio values from calibration for 4 ring oscillators. + maxItems: 1 + + clocks: + description: Reference to the crypto engine clock. + +required: + - compatible + - interrupts + - reg + - rosc-ratio + +additionalProperties: false + +examples: + - | + arm_cctrng: arm_cctrng@60000000 { + compatible = "arm,cryptocell-7x3-trng"; + interrupts = <0 29 4>; + reg = <0x60000000 0x10000>; + rosc-ratio = <5000 1000 500 0>; + };