From patchwork Tue Aug 22 15:25:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kaiser X-Patchwork-Id: 13361079 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 BEE9BEE4993 for ; Tue, 22 Aug 2023 15:28:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237074AbjHVP2h (ORCPT ); Tue, 22 Aug 2023 11:28:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32832 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237067AbjHVP2h (ORCPT ); Tue, 22 Aug 2023 11:28:37 -0400 Received: from viti.kaiser.cx (viti.kaiser.cx [IPv6:2a01:238:43fe:e600:cd0c:bd4a:7a3:8e9f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B37C1CDA; Tue, 22 Aug 2023 08:28:35 -0700 (PDT) Received: from pd956d63d.dip0.t-ipconnect.de ([217.86.214.61] helo=martin-debian-2.paytec.ch) by viti.kaiser.cx with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1qYTJ1-0006li-E0; Tue, 22 Aug 2023 17:28:31 +0200 From: Martin Kaiser To: Herbert Xu Cc: linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Martin Kaiser Subject: [PATCH 0/3] hwrng: imx-rngc - use polling instead of interrupt Date: Tue, 22 Aug 2023 17:25:50 +0200 Message-Id: <20230822152553.190858-1-martin@kaiser.cx> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Use polling and wait actively for the self test and the initial seeding of the rngc to complete. This is much simpler than using an interrupt and a completion. Also, there's nothing we can do in parallel while self test or initial seeding are running. Martin Kaiser (3): hwrng: imx-rngc - use polling to detect end of self test hwrng: imx-rngc - read status register for error checks hwrng: imx-rngc - use polling to wait for end of seeding drivers/char/hw_random/imx-rngc.c | 96 ++++++------------------------- 1 file changed, 16 insertions(+), 80 deletions(-)