From patchwork Mon Apr 10 18:45:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brad Larson X-Patchwork-Id: 672262 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 88273C77B61 for ; Mon, 10 Apr 2023 18:48:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229883AbjDJSs4 (ORCPT ); Mon, 10 Apr 2023 14:48:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55362 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230046AbjDJSsu (ORCPT ); Mon, 10 Apr 2023 14:48:50 -0400 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2067.outbound.protection.outlook.com [40.107.223.67]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 15234211E; Mon, 10 Apr 2023 11:48:15 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=iSZVzOuxE/LjJG5nNNKBwJ57y8xsXqGvt6rpy1Oj5ggHosNBWiquL3qUxLTbhnPIhbWLCzPsYYYPFRmzKVNgjkiK+kvdLz/ho+XBufs4/EE4p8R39ZioYwC/6nJy6ErFRxJANDEbg7SZiEIlh1M7g1qzNus/Ufii7/2D9eG6iBsr21FQ+1Ttie109gPjhDQfvtnChZnzuxu+1PLlYFQTlbeuwQ9LvE1t6HEyzrpXUr4rogD+WQJgx4bwgQkM2MNG0tMsbCeMbuclzwrQFokTQS+bW7xiABnS50hJvtJdwtlHRft5HnLK8bAV+/CGOdw9yPX6nRdx/5TTARpHdCtdNA== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=x8af604fGrGhqJmMiT/sEtq9ScrZ/AIvFHD/37Ve6FM=; b=MfqfMbhbDGcjHo6c8pELolYox0AIAJOdTCtfumamhH9LIE8viA/SpZOllsytlB6DKmM9hQPR+/SYxmnhdKLsZak8QnILNh5V7dljSBZJbsPwaZ6S4DHWx6+8Mkg/6M3LkC3bNY/tN41H1H8+VUsawWXZWNsIDQiq/m+UL40ttESFGHW5SvIL5TswA8pr7HMIWRSIx0+M4P/spYag4mvX7eFO6SxRFmIJg48COoKOFMYXumA0PwRcAhvYBhXZQzWgRIve9smtddt+o7L0anAVyLc4SpV4j3cp3bzxRQwmwH+GxvhEto+NEZUnQol/1yrHiLcGy+iePVXTZJqY7dQddw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=lists.infradead.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=x8af604fGrGhqJmMiT/sEtq9ScrZ/AIvFHD/37Ve6FM=; b=SU1OmXxWC+1CoNej0h0QRefoKF6Dp6f/Qs2yFcFH0N3LJYQdGjLME9tqBVyK8ZJRnXVvwGdPGJsYZcRqbAZLG4/hD5qiv1KLNStaiRqk2G73nWPEm+gtQNQV+O9BvYFmqSXkabet+lYgfPI+xs2NzlO25t04fOielmxmVIu7p0M= Received: from DS7PR03CA0040.namprd03.prod.outlook.com (2603:10b6:5:3b5::15) by IA1PR12MB8407.namprd12.prod.outlook.com (2603:10b6:208:3d9::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6277.35; Mon, 10 Apr 2023 18:48:00 +0000 Received: from DM6NAM11FT075.eop-nam11.prod.protection.outlook.com (2603:10b6:5:3b5:cafe::86) by DS7PR03CA0040.outlook.office365.com (2603:10b6:5:3b5::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6277.39 via Frontend Transport; Mon, 10 Apr 2023 18:47:59 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DM6NAM11FT075.mail.protection.outlook.com (10.13.173.42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6298.25 via Frontend Transport; Mon, 10 Apr 2023 18:47:59 +0000 Received: from platform-dev1.pensando.io (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Mon, 10 Apr 2023 13:47:56 -0500 From: Brad Larson To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v13 14/15] mmc: sdhci-cadence: Support mmc hardware reset Date: Mon, 10 Apr 2023 11:45:25 -0700 Message-ID: <20230410184526.15990-15-blarson@amd.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230410184526.15990-1-blarson@amd.com> References: <20230410184526.15990-1-blarson@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT075:EE_|IA1PR12MB8407:EE_ X-MS-Office365-Filtering-Correlation-Id: 1512a1ec-f36e-4c1e-dc27-08db39f41b88 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; CTRY:US; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:SATLEXMB04.amd.com; PTR:InfoDomainNonexistent; CAT:NONE; SFS:(13230028)(4636009)(39860400002)(346002)(396003)(376002)(136003)(451199021)(36840700001)(40470700004)(46966006)(478600001)(6666004)(16526019)(316002)(26005)(1076003)(186003)(54906003)(7416002)(2906002)(7406005)(70206006)(70586007)(6916009)(82310400005)(4326008)(8936002)(8676002)(41300700001)(5660300002)(356005)(81166007)(82740400003)(40480700001)(36756003)(40460700003)(47076005)(83380400001)(36860700001)(2616005)(336012)(426003)(36900700001); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Apr 2023 18:47:59.8877 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1512a1ec-f36e-4c1e-dc27-08db39f41b88 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT075.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB8407 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Add support for mmc hardware reset using a reset-controller that would need to be enabled in the device tree with a supporting driver. The default is disabled for all existing designs. Signed-off-by: Brad Larson Acked-by: Adrian Hunter Reviewed-by: Philipp Zabel --- v9 changes: - Previously patch 17/17 - Changed delay after reset_control_assert() from 9 to 3 usec - Renamed sdhci_mmc_hw_reset() to sdhci_cdns_mmc_hw_reset() --- drivers/mmc/host/sdhci-cadence.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c index 5d1e9cef74f5..b24aa27da50c 100644 --- a/drivers/mmc/host/sdhci-cadence.c +++ b/drivers/mmc/host/sdhci-cadence.c @@ -12,6 +12,7 @@ #include #include #include +#include #include "sdhci-pltfm.h" @@ -70,6 +71,7 @@ struct sdhci_cdns_priv { spinlock_t wrlock; /* write lock */ bool enhanced_strobe; void (*priv_writel)(struct sdhci_cdns_priv *priv, u32 val, void __iomem *reg); + struct reset_control *rst_hw; unsigned int nr_phy_params; struct sdhci_cdns_phy_param phy_params[]; }; @@ -457,6 +459,22 @@ static void sdhci_cdns_hs400_enhanced_strobe(struct mmc_host *mmc, SDHCI_CDNS_HRS06_MODE_MMC_HS400); } +static void sdhci_cdns_mmc_hw_reset(struct mmc_host *mmc) +{ + struct sdhci_host *host = mmc_priv(mmc); + struct sdhci_cdns_priv *priv = sdhci_cdns_priv(host); + + dev_dbg(mmc_dev(host->mmc), "emmc hardware reset\n"); + + reset_control_assert(priv->rst_hw); + /* For eMMC, minimum is 1us but give it 3us for good measure */ + udelay(3); + + reset_control_deassert(priv->rst_hw); + /* For eMMC, minimum is 200us but give it 300us for good measure */ + usleep_range(300, 1000); +} + static int sdhci_cdns_probe(struct platform_device *pdev) { struct sdhci_host *host; @@ -520,6 +538,15 @@ static int sdhci_cdns_probe(struct platform_device *pdev) if (ret) goto free; + if (host->mmc->caps & MMC_CAP_HW_RESET) { + priv->rst_hw = devm_reset_control_get_optional_exclusive(dev, NULL); + if (IS_ERR(priv->rst_hw)) + return dev_err_probe(mmc_dev(host->mmc), PTR_ERR(priv->rst_hw), + "reset controller error\n"); + if (priv->rst_hw) + host->mmc_host_ops.card_hw_reset = sdhci_cdns_mmc_hw_reset; + } + ret = sdhci_add_host(host); if (ret) goto free;