From mboxrd@z Thu Jan 1 00:00:00 1970 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=-2.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 9AECCC432C0 for ; Wed, 20 Nov 2019 16:17:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6FD9F206F4 for ; Wed, 20 Nov 2019 16:17:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="JZhc2sET" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728305AbfKTQRP (ORCPT ); Wed, 20 Nov 2019 11:17:15 -0500 Received: from mout.gmx.net ([212.227.15.19]:56695 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729397AbfKTQRP (ORCPT ); Wed, 20 Nov 2019 11:17:15 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1574266609; bh=RI4Q4Ucrk+rlZ3lrnsF6lENBGO63UxXhYlY8pNz55u0=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=JZhc2sETppPeNxuagIr8jg0GNhX5QOvzodBK8qzSBAqsY3hSGqGHqp5zfmSfhQYfM QOtSuRtkxMtXYQeWvs6d6GUxAiBWh3A+khv2Pj0fLVvByrtiBGZNg9/L2FrkbepjGB /HR8jwsH1mJCnhFPJKHxm+axfWGnIPS2rVhrIOcU= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [192.168.1.176] ([37.4.249.139]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MDhlV-1ifObe2TmZ-00Anrf; Wed, 20 Nov 2019 17:16:49 +0100 Subject: Re: [PATCH v3 0/4] Raspberry Pi 4 HWRNG Support To: Stephen Brennan Cc: Mark Rutland , devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, Florian Fainelli , Herbert Xu , Scott Branden , Greg Kroah-Hartman , linux-arm-kernel@lists.infradead.org, Ray Jui , linux-kernel@vger.kernel.org, Eric Anholt , Rob Herring , bcm-kernel-feedback-list@broadcom.com, Stefan Wahren , Matt Mackall , Arnd Bergmann , linux-crypto@vger.kernel.org References: <20191120031622.88949-1-stephen@brennan.io> From: Stefan Wahren Message-ID: <99554159-6abb-6ea5-aebb-57a148a59b78@gmx.net> Date: Wed, 20 Nov 2019 17:16:47 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20191120031622.88949-1-stephen@brennan.io> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US X-Provags-ID: V03:K1:Z9dBjSZwZ2+O3WL2mwvh7agX4F2+npux6rP0HzJz7C0nP+tDAMC KQzPq0eTXEAk9jVgOlqT8vP2wmxww6+SUCR9j1HBLAIgFW3b28LVkdn2TThDIbufs4MFABI PMatIzczHcXblJkesfLPKedLAo8DOnWNpg9EkujbzNGC3T5LEsVijcyJMCB6r7amPqxqaRG uLGpUk3EeLHzdfwOP9now== X-UI-Out-Filterresults: notjunk:1;V03:K0:5jm9EYJO6bY=:myZF3slHJKl7WcF+aZXrdv MgzqvkteRURkYoUDmr+zhXM8Cfd8ghxg9jmh9hyLzE9+8Q9KavSc1UG0QJ8hxjle5WGnUKVHK fKWCm6Ka4PZUDypiw3/YmkJUWhwRsbigBECPDSQuzqJMXNoGMRU62rju/vmAlfCg6Y1KiGzH4 es3vDusm6E59LFb05pmgjzDxRujv2M7xhtluZL4YX0DlslM95u8ZYRE7OsiGrM2UCL0RqNzlT M8ifb2Ol9A8emo7KVEsOUUc8b9Uqm0+JsveriLwGxachpE8h9nNB7UgMFwKiUmcrwhDFscfXs GmmC/VpQwr3a5pTX96NLWmuMXs94/vv19fcYsYSoy6BnWTf4ltERN7trSWpv27SlICn5jdVXJ k2bBlP8AJ3VITdGXEU2avbDAo23Cj7Gq4OUI3nsoN8XyIrdMSd08eQq/SnknmfI70QaPeKvLH rb2bA/tyy/SEy5UFTtkdXwcn8Rpw5kHbiiKiHPSbGvvedGZNomEVvUX/huJva/BdjY/tHSp0H EYERBhEXtg7rJIwpho2iba2QK6/+yjQJtm9oeMs2pBYBoYxME8weJrkeluI6LEYzRXdnG+qAM Zs2i+kBP3soYllo1WO3rnAywiD4+rLV8f+Oee5tAGOVprH7VURS4EluS6RBXPRzY2mmEcUUDH 6vYBbBPu+ImtteiqKFs8rnvDnLVCba4X3PWLw7yjPc4RYEPkekKrvNuPinzW7vZFTlP0TSTZ1 2urMBcgpk3RMiMAfXCIv1xVZYqiNF+cXCxEeUDR+LHCBsxBJRej0sYGt38L3ag3h1CSfPiuku gFzNGnoRfmOF8ktdn9KttnqLOqdDWUEYic/zmq3KGBVbgSm4AQgbDIky94lLUHuOIb3yo62Di lQnZievyT6r8Ku917SF3uaIL+70xnPlDNHV3if6OU8pFGDRqDWO5idKbvk280eEzuSDt+suQC g8i52ah/wHqPLXN6PDOFzI3ibwPDNPw7Oi/OLEWQ30KzmOpLzCIIQ5qPm0RojztSaYL2tePij GpF2lpg/RoNv+Ye83qNHQ557QuhEdCSsQ0XoQ5gTcrQXVtIhscclS989HwsnPkIiTxri0kxGs aXSc/f8jrfXCSkO5yq0iRJuOuLMIJSinfmQwjBZ7+LL+QcSx8VK8TH2pK34W9jBeIOou/q912 UqALb5FoZBqGP6VAUMg6Hj+hPa8vXI3cs9XDTc5aOO5/ZKpfEganNQjC3hYdE/XkpGgWBsKOK VyKzPak831kNwWM8s/4oVjFofoAopFNktmQv9KHR4qWWwFAJBNPC+6Yltf6g= Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi Stephen, Am 20.11.19 um 04:16 schrieb Stephen Brennan: > This patch series enables support for the HWRNG included on the Raspberry > Pi 4. It is simply a rebase of Stefan's branch [1]. I went ahead and > tested this out on a Pi 4. Prior to this patch series, attempting to use > the hwrng gives: > > $ head -c 2 /dev/hwrng > head: /dev/hwrng: Input/output error > > After this series, the same command gives two random bytes. just a note: a more expressive test would be running rngtest (package rng-tools) on this device. Regards Stefan