From patchwork Wed Dec 23 17:21:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 352112 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 CA6D0C4332D for ; Wed, 23 Dec 2020 17:22:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0604207D8 for ; Wed, 23 Dec 2020 17:22:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726112AbgLWRWo (ORCPT ); Wed, 23 Dec 2020 12:22:44 -0500 Received: from www.zeus03.de ([194.117.254.33]:41310 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726396AbgLWRWo (ORCPT ); Wed, 23 Dec 2020 12:22:44 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=sang-engineering.com; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=k1; bh=4q17jxIBF0hacu KxfGWJhOAjHtYyErJhLvfidIqMPb4=; b=BLP7vDXysgI5Otmny0MUYiyQMnQsuj NrL7+4wm5pbex4jjaxMGW+I8NiFV9wZBgyWGwreQwLBjlGyFKuwwuf2eIVPDytA+ sG3LC49NbC9N/yXcCQPUAq6meFkYFvjiJxi7mZjFR7j+ZOG0LYQJOMihi874LYFx VU/GRlX/d00P0= Received: (qmail 543646 invoked from network); 23 Dec 2020 18:22:02 +0100 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 23 Dec 2020 18:22:02 +0100 X-UD-Smtp-Session: l3s3148p1@PEfw7SS3uudUhszw From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org, Kuninori Morimoto , Yoshihiro Shimoda , Wolfram Sang Subject: [PATCH 3/4] i2c: rcar: make sure irq is not threaded on Gen2 and earlier Date: Wed, 23 Dec 2020 18:21:53 +0100 Message-Id: <20201223172154.34462-4-wsa+renesas@sang-engineering.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201223172154.34462-1-wsa+renesas@sang-engineering.com> References: <20201223172154.34462-1-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Ensure this irq runs as fast as possible. Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-rcar.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c index ad6630e3cc77..3c9c3a6f7ac8 100644 --- a/drivers/i2c/busses/i2c-rcar.c +++ b/drivers/i2c/busses/i2c-rcar.c @@ -928,6 +928,7 @@ static int rcar_i2c_probe(struct platform_device *pdev) struct rcar_i2c_priv *priv; struct i2c_adapter *adap; struct device *dev = &pdev->dev; + unsigned long irqflags = 0; int ret; /* Otherwise logic will break because some bytes must always use PIO */ @@ -976,6 +977,9 @@ static int rcar_i2c_probe(struct platform_device *pdev) rcar_i2c_write(priv, ICSAR, 0); /* Gen2: must be 0 if not using slave */ + if (priv->devtype < I2C_RCAR_GEN3) + irqflags |= IRQF_NO_THREAD; + if (priv->devtype == I2C_RCAR_GEN3) { priv->rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL); if (!IS_ERR(priv->rstc)) { @@ -995,7 +999,7 @@ static int rcar_i2c_probe(struct platform_device *pdev) priv->flags |= ID_P_HOST_NOTIFY; priv->irq = platform_get_irq(pdev, 0); - ret = devm_request_irq(dev, priv->irq, rcar_i2c_irq, 0, dev_name(dev), priv); + ret = devm_request_irq(dev, priv->irq, rcar_i2c_irq, irqflags, dev_name(dev), priv); if (ret < 0) { dev_err(dev, "cannot get irq %d\n", priv->irq); goto out_pm_disable;