From patchwork Thu Aug 24 19:20:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Kaiser X-Patchwork-Id: 13364589 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 140C2C27C40 for ; Thu, 24 Aug 2023 19:24:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=yGNjviLeEy1MLdZ4yTwZj83MVV16WQ+HeRjBJCw4H7w=; b=Ck/+q4MxAt88oy RsHxnOjoqkwVvbXu6Eh7KRx7ey632Y67n4kUcc51seTa8WxwStgFsM0z55/kG/W/Nhv61+U9DqUAe iRS64M1BQbXbJQqdLCdo46tfME4isGGKxC5A4NyHq962XI5X/Fin/F4cFPvt54dT4tMbKv999Rnpi P2K9c7Aq+IF7J+BZc1at19OZSAVqMsmAEKTIL7NReQzUBycd6JQshzwxsPFSKUbBv4ouQ8xy7rvYo Wdq4HLAO18Cg+9hFfoXBwr5ywC14dWXqK/7maHC0wSCptOEyYaudcSdk/HTWMojDsNDaPVush/VmI mBW4KUfi9a7oXplqEoXw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qZFvv-003esu-2p; Thu, 24 Aug 2023 19:23:55 +0000 Received: from viti.kaiser.cx ([2a01:238:43fe:e600:cd0c:bd4a:7a3:8e9f]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qZFvs-003er1-2c for linux-arm-kernel@lists.infradead.org; Thu, 24 Aug 2023 19:23:54 +0000 Received: from dslb-188-097-211-187.188.097.pools.vodafone-ip.de ([188.97.211.187] 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 1qZFvg-00036P-Ny; Thu, 24 Aug 2023 21:23:40 +0200 From: Martin Kaiser To: Herbert Xu Cc: Alexander Stein , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Martin Kaiser Subject: [PATCH v2 0/6] hwrng: imx-rngc - use polling instead of interrupt Date: Thu, 24 Aug 2023 21:20:53 +0200 Message-Id: <20230824192059.1569591-1-martin@kaiser.cx> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230824_122353_013872_3702D460 X-CRM114-Status: UNSURE ( 6.95 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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. v2: - set reasonable timeouts - separate commit for the removal of interrupt handling - readl_poll_timeout does not wait in the foreground Martin Kaiser (6): hwrng: imx-rngc - reasonable timeout for selftest hwrng: imx-rngc - reasonable timeout for initial seed 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 for initial seed hwrng: imx-rngc - remove interrupt handler drivers/char/hw_random/imx-rngc.c | 100 ++++++------------------------ 1 file changed, 18 insertions(+), 82 deletions(-)