From patchwork Thu Oct 15 14:08:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sagar Shrikant Kadam X-Patchwork-Id: 11839415 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5375014B3 for ; Thu, 15 Oct 2020 14:09:06 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 03F692075B for ; Thu, 15 Oct 2020 14:09:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="2m/DSCPo"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sifive.com header.i=@sifive.com header.b="ovQi+cLn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 03F692075B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sifive.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=eQXxVLdm+TeOCqi9l4wjAHOFgixfH2H+3VdEwBFItdc=; b=2m/DSCPoJExOBRp8FvfRkzdDM Fut0RXvoH+WSO6fcNYncReNi+h/7k4rQl2eK2WcAXqOQrJNIaUNjh8cka4bHVQaH7Q20+qNZBDPgS wMqexP+292Fsuy2NvW7hfSVsooKCqJyGZIHk5qQHeQTdWVGSuU1cTrn09gZSRcdjSJ5RMIxm3dHuS iYxspE0iT08IUltumslEGoe8sJdBIkybwR+sOlIB90lLK46Db1if0BZ3LRh4uiOwrD45tMX5tF1fv x0YIZhKcbgXEZzL4EiIUeEvaZ3zR21lAYQpjkbD9PKzFTkOMODCXQZ8zJAeLQuLttPjBUV0TGROiQ rhv6XTD6w==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kT3w0-0001nK-Ek; Thu, 15 Oct 2020 14:08:48 +0000 Received: from mail-co1nam11on2084.outbound.protection.outlook.com ([40.107.220.84] helo=NAM11-CO1-obe.outbound.protection.outlook.com) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kT3vw-0001k2-0I for linux-riscv@lists.infradead.org; Thu, 15 Oct 2020 14:08:45 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=HuhCO+pvIoRcZNjJ8VjnOlXCIuuQEQD8bGu5Ew+vdp/Tk3oVk6/BjryPSQmgndg9uNs4eysdqtlQadjshb4iApgQf/L9sSEMarES8GJRnnjf+sw3klP8VjoushTA1qzFGjkAkKO2nrc8/pULrv4RscGZ/QLrlSNRD8uoMj2JM84IqIDRSXjSZFw+hWa2bxTgUnrPlubBrMxOsxccfvITdMj7DtPPObACrmXScId1PEeTGAZ10cSYKcCn58xucM3kU2o7AFunShAfTdCDq/sOFHjce/JXuoeuCf1Cmd+9TR9bKOtb5eLKCJJ7Kn1k5Q17XleiiseC4iihd6emasw6LA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=GLAiAcLFf/dYCOHCTMyVXRiKfcxCWF1jf/3HCZ8fcm8=; b=HEXkaw2+ekw5SXJswBd6CatdsFx1Q5XwuhBYKUbzCZL+wHnU1CZISxjdamIGKuIRZRpctxq2+APMLVATcU6nSQYLmsq4/K6wzLkViF6JyWuXRSAftB0H8BCqdd0FNooisCvWvxfIgx+wcgV6AsbdE1nViY7bUR6+QYrzvmGkKytU4+BaOX/tDkpbHzpLsw/xp1TX0YupC+SYz8m1PaczrDHx7UOXkVEt32TgnMrTHtcZ5k0sDSotkPZAkI7h3HBkqqPnxepuJRGwjncrtiNrCrGM5XRZQqIW+EI0PGBmVbC6HftTBMg0GlTaS/BJzPG3TiNsGfogdEA8H9v5F+SXPA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=openfive.com; dmarc=pass action=none header.from=sifive.com; dkim=pass header.d=sifive.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=GLAiAcLFf/dYCOHCTMyVXRiKfcxCWF1jf/3HCZ8fcm8=; b=ovQi+cLnl8OsVt1IF5o87wbCA8dlla9/uIqNUDZqYIUYRQ6aJ7Qdgiwx2gb+nEGPYn+4V57AcAXErejyFnvKvoqrV0ouk7Naf29O9j2V2JS+mEdjZdE2gQSTo9TC1OyLLFgcBZtWU90K+Ys840bCag7u8YGj4baFr9tOxVlT+yQ= Authentication-Results: vger.kernel.org; dkim=none (message not signed) header.d=none; vger.kernel.org; dmarc=none action=none header.from=sifive.com; Received: from DM6PR13MB3451.namprd13.prod.outlook.com (2603:10b6:5:1c3::10) by DM6PR13MB4067.namprd13.prod.outlook.com (2603:10b6:5:2a6::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3477.11; Thu, 15 Oct 2020 14:08:40 +0000 Received: from DM6PR13MB3451.namprd13.prod.outlook.com ([fe80::f49f:d6d6:4c97:e5d5]) by DM6PR13MB3451.namprd13.prod.outlook.com ([fe80::f49f:d6d6:4c97:e5d5%7]) with mapi id 15.20.3477.019; Thu, 15 Oct 2020 14:08:40 +0000 From: Sagar Shrikant Kadam To: linux-kernel@vger.kernel.org Subject: [PATCH v3 1/1] i2c: ocores: fix polling mode workaround on FU540-C000 SoC Date: Thu, 15 Oct 2020 07:08:27 -0700 Message-Id: <1602770907-61852-2-git-send-email-sagar.kadam@sifive.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1602770907-61852-1-git-send-email-sagar.kadam@sifive.com> References: <1602770907-61852-1-git-send-email-sagar.kadam@sifive.com> X-Originating-IP: [64.62.193.194] X-ClientProxiedBy: BYAPR05CA0069.namprd05.prod.outlook.com (2603:10b6:a03:74::46) To DM6PR13MB3451.namprd13.prod.outlook.com (2603:10b6:5:1c3::10) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from gamma15.internal.sifive.com (64.62.193.194) by BYAPR05CA0069.namprd05.prod.outlook.com (2603:10b6:a03:74::46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3477.13 via Frontend Transport; Thu, 15 Oct 2020 14:08:39 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: caf7d239-b84f-4e89-6a1a-08d87113d144 X-MS-TrafficTypeDiagnostic: DM6PR13MB4067: X-LD-Processed: 22f88e9d-ae0d-4ed9-b984-cdc9be1529f1,ExtAddr X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:1751; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: CGRrBQ021PvAbEnoo5K/zWgDQTqR+892QykxyvENmNT09Cc++xKTGKouiLIzqsT1Mx4mX2AXFHkOGfmQVJ48IJxg4JGNIB06JqC4/8zGWzAEL631H+cy4LXmlfWfwEfwUbw5DNVAG67saJBRJu5hqZmppFhC8D3cGjwlxhBzBzCDRLZXgHG8flv/S7hSn4BiP7+gNo94RERtl1ah1dKGGuyLp6sDBCXbW6hyM4hlRB9kZ/uJ1LtBc42tMlCIjPhNfnwi22pj/272qOUBhfsLVcjFI2gLg7Qh5mHm82mhbcYUQL3gXMManLqUN1W5GwKa X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:DM6PR13MB3451.namprd13.prod.outlook.com; PTR:; CAT:NONE; SFS:(39850400004)(366004)(396003)(346002)(376002)(136003)(36756003)(16526019)(5660300002)(83380400001)(83170400001)(2906002)(316002)(6486002)(107886003)(26005)(186003)(52116002)(8676002)(7696005)(956004)(66946007)(2616005)(66476007)(66556008)(6666004)(8936002)(6916009)(4326008)(478600001)(42882007); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: sifive.com X-MS-Exchange-CrossTenant-Network-Message-Id: caf7d239-b84f-4e89-6a1a-08d87113d144 X-MS-Exchange-CrossTenant-AuthSource: DM6PR13MB3451.namprd13.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Oct 2020 14:08:40.3653 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 22f88e9d-ae0d-4ed9-b984-cdc9be1529f1 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 8bOQ8PtLIBIIgqmMGEPXxVz9N5hIBx++PuT6DuCTVPUFeu8bJj2RI2lfxIoxfK9GCkp/f6SkQulDLTeUAAsfBg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR13MB4067 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201015_100844_096465_C222D377 X-CRM114-Status: GOOD ( 16.91 ) X-Spam-Score: 0.1 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (0.1 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [40.107.220.84 listed in wl.mailspike.net] -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [40.107.220.84 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.0 MSGID_FROM_MTA_HEADER Message-Id was added by a relay X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: andrew@lunn.ch, peter@korsgaard.com, aou@eecs.berkeley.edu, palmer@dabbelt.com, linux-i2c@vger.kernel.org, paul.walmsley@sifive.com, linux-riscv@lists.infradead.org, Sagar Shrikant Kadam Sender: "linux-riscv" Errors-To: linux-riscv-bounces+patchwork-linux-riscv=patchwork.kernel.org@lists.infradead.org The FU540-C000 has a broken IRQ and support was added earlier so that it will operate in polling mode, but seems to work only in case interrupts property is missing from the i2c0 dt-node. This should not be the case and the driver should handle polling mode with the interrupt property present in i2c0 node of the device tree. So check if it's the FU540-C000 soc and enable polling mode master xfers, as the IRQ for this chip is broken. Fixes commit c45d4ba86731 ("i2c: ocores: add polling mode workaround for Sifive FU540-C000 SoC") Signed-off-by: Sagar Shrikant Kadam --- drivers/i2c/busses/i2c-ocores.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c index f5fc75b..1dab02d 100644 --- a/drivers/i2c/busses/i2c-ocores.c +++ b/drivers/i2c/busses/i2c-ocores.c @@ -686,17 +686,21 @@ static int ocores_i2c_probe(struct platform_device *pdev) init_waitqueue_head(&i2c->wait); + /* + * Set OCORES_FLAG_BROKEN_IRQ to enable workaround for + * FU540-C000 SoC in polling mode. + * Since the SoC does have interrupt its dt has the interrupt + * defined but it should be bypassed in driver as this SoC has + * a broken IRQ, hence update the master_xfer to use polling + * transfers. + */ + if (of_device_is_compatible(pdev->dev.of_node, + "sifive,fu540-c000-i2c")) + i2c->flags |= OCORES_FLAG_BROKEN_IRQ; + irq = platform_get_irq(pdev, 0); - if (irq == -ENXIO) { + if (i2c->flags & OCORES_FLAG_BROKEN_IRQ || irq == -ENXIO) { ocores_algorithm.master_xfer = ocores_xfer_polling; - - /* - * Set in OCORES_FLAG_BROKEN_IRQ to enable workaround for - * FU540-C000 SoC in polling mode. - */ - match = of_match_node(ocores_i2c_match, pdev->dev.of_node); - if (match && (long)match->data == TYPE_SIFIVE_REV0) - i2c->flags |= OCORES_FLAG_BROKEN_IRQ; } else { if (irq < 0) return irq;