From patchwork Sat Dec 31 22:01:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Holland X-Patchwork-Id: 638563 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00665C3DA7A for ; Sat, 31 Dec 2022 22:02:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235853AbiLaWCJ (ORCPT ); Sat, 31 Dec 2022 17:02:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51924 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232169AbiLaWB5 (ORCPT ); Sat, 31 Dec 2022 17:01:57 -0500 Received: from out3-smtp.messagingengine.com (out3-smtp.messagingengine.com [66.111.4.27]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92C7264C6; Sat, 31 Dec 2022 14:01:53 -0800 (PST) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.nyi.internal (Postfix) with ESMTP id 20D4F5C00AF; Sat, 31 Dec 2022 17:01:52 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Sat, 31 Dec 2022 17:01:52 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sholland.org; h= cc:cc:content-transfer-encoding:date:date:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to:sender :subject:subject:to:to; s=fm3; t=1672524112; x=1672610512; bh=Of 0xMXPiylA4jEfEw42JIYQDYz/9F74OJjr6iVQvau4=; b=ZtVwNinm/RpM0BF/8n PJsJKk0KygymBCIAtE3iFPJgywtNXNjJHhXRmg2JPeUpEQUlHn2MGHyOYURQdEDz qC7f20sSNOczGEi0szqVyko9sKEw8IXB7Da5HSJC2iCvBdbZzm2qobf/y8QM8Dge 8EVfYoqn28YJ8HkEtuIKvaPX7TXQBHcf9E+uY67NZk/4Dv4y3g5H+v0BKh8CyWJf uDAwFpO+XTi+5rpxtoSv5ka7qg0VESI5FqLH/ljKqtdrtiQ0Dv/k2hPVRfQOUrD+ 747ghfg/q89gUP5a0xKVxVjqL/CEdgd59goHus+aH7G8U6W2xhIDYoeq/+O3+h2T MBDA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:sender:subject :subject:to:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm2; t=1672524112; x=1672610512; bh=Of0xMXPiylA4j EfEw42JIYQDYz/9F74OJjr6iVQvau4=; b=OwHK5qO2/4aDZGB5DGZ/hUW7iIeNu RtZV5v/8WuTM+DRux4vF1WzAs2Lsg2+dqHQXo3Egd8vlSicV6k8xE5dTTveBecY/ xAfGfWvG02dPvxhZ5+B5l59J+Cs7waj4GCYAFlvTAwekKnumOGd3b2Whn7EiOtNN 64HXNlvklQ+vvBr6QiPiGIPJUjeahO1G2wenG2JBhvkyfROXKWdyf/NG2HfWgHoE KbLfubEzbHYBINk7cDcU9n8Qe2jy2n/nahB19neL5c+gmvf9XCVb6hamqjvimtm8 QuHvWcIP0P9ABaiQ46tumgR3jeYEG8zSZj5He7vLdyyZXN17mOCHgnq+g== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrieekgdduheehucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepufgrmhhu vghlucfjohhllhgrnhguuceoshgrmhhuvghlsehshhholhhlrghnugdrohhrgheqnecugg ftrfgrthhtvghrnhepudekteeuudehtdelteevgfduvddvjefhfedulefgudevgeeghefg udefiedtveetnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrh homhepshgrmhhuvghlsehshhholhhlrghnugdrohhrgh X-ME-Proxy: Feedback-ID: i0ad843c9:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Sat, 31 Dec 2022 17:01:51 -0500 (EST) From: Samuel Holland To: Corentin Labbe , Herbert Xu , "David S . Miller" , Chen-Yu Tsai , Jernej Skrabec , Krzysztof Kozlowski , Rob Herring Cc: Samuel Holland , Albert Ou , Conor Dooley , Palmer Dabbelt , Paul Walmsley , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-sunxi@lists.linux.dev Subject: [PATCH v2 2/3] crypto: sun8i-ce - Add TRNG clock to the D1 variant Date: Sat, 31 Dec 2022 16:01:44 -0600 Message-Id: <20221231220146.646-3-samuel@sholland.org> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221231220146.646-1-samuel@sholland.org> References: <20221231220146.646-1-samuel@sholland.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org At least the D1 variant requires a separate clock for the TRNG. Without this clock enabled, reading from /dev/hwrng reports: sun8i-ce 3040000.crypto: DMA timeout for TRNG (tm=96) on flow 3 Experimentation shows that the necessary clock is the SoC's internal RC oscillator. This makes sense, as noise from the oscillator can be used as a source of entropy. Signed-off-by: Samuel Holland Reviewed-by: Jernej Skrabec --- Changes in v2: - New patch for v2 drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c | 1 + drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c index 9f6594699835..a6865ff4d400 100644 --- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c +++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c @@ -118,6 +118,7 @@ static const struct ce_variant ce_d1_variant = { { "bus", 0, 200000000 }, { "mod", 300000000, 0 }, { "ram", 0, 400000000 }, + { "trng", 0, 0 }, }, .esr = ESR_D1, .prng = CE_ALG_PRNG, diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h index 8177aaba4434..27029fb77e29 100644 --- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h +++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce.h @@ -105,7 +105,7 @@ #define MAX_SG 8 -#define CE_MAX_CLOCKS 3 +#define CE_MAX_CLOCKS 4 #define MAXFLOW 4