From patchwork Thu Sep 15 12:07:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Amit Kumar Mahapatra X-Patchwork-Id: 606394 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 A1F9FC6FA82 for ; Thu, 15 Sep 2022 12:08:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229911AbiIOMI1 (ORCPT ); Thu, 15 Sep 2022 08:08:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40212 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230257AbiIOMIV (ORCPT ); Thu, 15 Sep 2022 08:08:21 -0400 Received: from NAM04-MW2-obe.outbound.protection.outlook.com (mail-mw2nam04on2043.outbound.protection.outlook.com [40.107.101.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 966607D1C3; Thu, 15 Sep 2022 05:08:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=WECBcTeDVkr7xjx8lHzbWlOZr7WM4YqpJq6xDO00juUptxu4Ykjmj6ArdUc7WU11VJ2wRb4JR6NBXDcIpVyKD1LjBMxOxjSsZeeAbUeEmxYyLYx+66aBTmCTS730LIqm6SK4lemBFwdkzXbPG2ne6xmRp12k1JvRwYM6xBnbdjXsXaXQqW+f7+jMYdv2bwLHMryZFMGsTelXOpKWaDJbxpVU3vO3if5WmcqaGWMjR9rCqu4fTI5/ndh13ZFJWYeu0Y48SF8QEMn9Fidr9aNT8n9AleZXvuyQ7sqFuIqaXReDeiZ/qZrw5B443DKKzlXRZoTu3UAPSiBPuV3UTqNKdw== 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=3WlEA8FSZiP3dwCrA4X9QhFCQoEmG3MAcuV1rXN1Dwg=; b=gVy1ibbqwltJ4MxiD+1ABzDrFLjzGbfCxzRF9XzuZyLCzM26fJFA3bK3+0IElElnGVmHnDwZcRKdA2l3NrTpkoOh5dQDONPLEo3R+KgAGO4dUvz6wNlDzeWki8/baZrHyW7iO1CKkndCWn8w1JR7qkelqxKJOYFawFEw3ZlEczOeu77jwGsAikIXfC36OEs6rigTpZRVv475obrBpy3NyBmmXvXHGPV8xl4zuExV0v+NT8ov+urz9a8J4rVs/KrMLHem8fuwSW9u3srpXYPWqIKKhGt3y2sZLK75mJLd8OIr00IX/t4F/TgtBtWjseAG4RXIf9IDmwYdcLmmq5WB3g== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 149.199.62.198) smtp.rcpttodomain=kernel.org smtp.mailfrom=xilinx.com; dmarc=pass (p=none sp=none pct=100) action=none header.from=xilinx.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xilinx.onmicrosoft.com; s=selector2-xilinx-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=3WlEA8FSZiP3dwCrA4X9QhFCQoEmG3MAcuV1rXN1Dwg=; b=YeVAhRxqoMUz/GLuCAPZKGUafDsS0huI0WeWdhc7nOZ30Jox567PfFp2ClP3EbWAtEkOcvWxnQd110zCg8JTDktjv6YBfPX9R5jxmUCWPj+2ilAW6loLJubzzlOJcsFm8y7v2NxD920ay1Cdo5x7k8Hv9CCmx2f63GU1K3VqodY= Received: from DS7PR03CA0240.namprd03.prod.outlook.com (2603:10b6:5:3ba::35) by DM8PR02MB8296.namprd02.prod.outlook.com (2603:10b6:8:7::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5612.19; Thu, 15 Sep 2022 12:08:11 +0000 Received: from DM3NAM02FT015.eop-nam02.prod.protection.outlook.com (2603:10b6:5:3ba:cafe::a1) by DS7PR03CA0240.outlook.office365.com (2603:10b6:5:3ba::35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5632.15 via Frontend Transport; Thu, 15 Sep 2022 12:08:11 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 149.199.62.198) smtp.mailfrom=xilinx.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=xilinx.com; Received-SPF: Pass (protection.outlook.com: domain of xilinx.com designates 149.199.62.198 as permitted sender) receiver=protection.outlook.com; client-ip=149.199.62.198; helo=xsj-pvapexch02.xlnx.xilinx.com; pr=C Received: from xsj-pvapexch02.xlnx.xilinx.com (149.199.62.198) by DM3NAM02FT015.mail.protection.outlook.com (10.13.5.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5632.12 via Frontend Transport; Thu, 15 Sep 2022 12:08:11 +0000 Received: from xsj-pvapexch02.xlnx.xilinx.com (172.19.86.41) by xsj-pvapexch02.xlnx.xilinx.com (172.19.86.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.9; Thu, 15 Sep 2022 05:08:02 -0700 Received: from smtp.xilinx.com (172.19.127.95) by xsj-pvapexch02.xlnx.xilinx.com (172.19.86.41) with Microsoft SMTP Server id 15.1.2507.9 via Frontend Transport; Thu, 15 Sep 2022 05:08:02 -0700 Envelope-to: broonie@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, git@amd.com, michal.simek@amd.com, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, akumarma@amd.com Received: from [10.140.6.39] (port=33420 helo=xhdsgoud40.xilinx.com) by smtp.xilinx.com with esmtp (Exim 4.90) (envelope-from ) id 1oYnf0-000Fci-9I; Thu, 15 Sep 2022 05:08:02 -0700 From: Amit Kumar Mahapatra To: , , CC: , , , , , , , Amit Kumar Mahapatra Subject: [PATCH v2 2/7] spi: spi-zynqmp-gqspi: Set CPOL and CPHA during hardware init Date: Thu, 15 Sep 2022 17:37:45 +0530 Message-ID: <20220915120750.1424984-3-amit.kumar-mahapatra@xilinx.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220915120750.1424984-1-amit.kumar-mahapatra@xilinx.com> References: <20220915120750.1424984-1-amit.kumar-mahapatra@xilinx.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM3NAM02FT015:EE_|DM8PR02MB8296:EE_ X-MS-Office365-Filtering-Correlation-Id: b18b2f9e-f037-4928-2de8-08da9712f5fc X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply 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:149.199.62.198; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:xsj-pvapexch02.xlnx.xilinx.com; PTR:unknown-62-198.xilinx.com; CAT:NONE; SFS:(13230022)(4636009)(136003)(39860400002)(376002)(396003)(346002)(451199015)(46966006)(36840700001)(40470700004)(8676002)(36860700001)(40460700003)(336012)(5660300002)(186003)(110136005)(8936002)(7416002)(7696005)(26005)(54906003)(6666004)(107886003)(316002)(82310400005)(83380400001)(478600001)(2616005)(41300700001)(7636003)(36756003)(82740400003)(9786002)(47076005)(1076003)(356005)(426003)(2906002)(70586007)(40480700001)(4326008)(70206006)(102446001); DIR:OUT; SFP:1101; X-OriginatorOrg: xilinx.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Sep 2022 12:08:11.7403 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b18b2f9e-f037-4928-2de8-08da9712f5fc X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c; Ip=[149.199.62.198]; Helo=[xsj-pvapexch02.xlnx.xilinx.com] X-MS-Exchange-CrossTenant-AuthSource: DM3NAM02FT015.eop-nam02.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM8PR02MB8296 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org During every transfer GQSPI driver writes the CPOL & CPHA values to the configuration register. But the CPOL & CPHA values do not change in between multiple transfers, so moved the CPOL & CPHA initialization to hardware init so that the values are written only once. Signed-off-by: Amit Kumar Mahapatra --- drivers/spi/spi-zynqmp-gqspi.c | 32 +++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-) diff --git a/drivers/spi/spi-zynqmp-gqspi.c b/drivers/spi/spi-zynqmp-gqspi.c index b07bb97cf874..6771496c1f86 100644 --- a/drivers/spi/spi-zynqmp-gqspi.c +++ b/drivers/spi/spi-zynqmp-gqspi.c @@ -264,7 +264,9 @@ static void zynqmp_gqspi_selectslave(struct zynqmp_qspi *instanceptr, * - Enable manual slave select * - Enable manual start * - Deselect all the chip select lines - * - Set the little endian mode of TX FIFO and + * - Set the little endian mode of TX FIFO + * - Set clock phase + * - Set clock polarity and * - Enable the QSPI controller */ static void zynqmp_qspi_init_hw(struct zynqmp_qspi *xqspi) @@ -303,10 +305,17 @@ static void zynqmp_qspi_init_hw(struct zynqmp_qspi *xqspi) config_reg |= GQSPI_CFG_WP_HOLD_MASK; /* Clear pre-scalar by default */ config_reg &= ~GQSPI_CFG_BAUD_RATE_DIV_MASK; - /* CPHA 0 */ - config_reg &= ~GQSPI_CFG_CLK_PHA_MASK; - /* CPOL 0 */ - config_reg &= ~GQSPI_CFG_CLK_POL_MASK; + /* Set CPHA */ + if (xqspi->ctlr->mode_bits & SPI_CPHA) + config_reg |= GQSPI_CFG_CLK_PHA_MASK; + else + config_reg &= ~GQSPI_CFG_CLK_PHA_MASK; + /* Set CPOL */ + if (xqspi->ctlr->mode_bits & SPI_CPOL) + config_reg |= GQSPI_CFG_CLK_POL_MASK; + else + config_reg &= ~GQSPI_CFG_CLK_POL_MASK; + zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, config_reg); /* Clear the TX and RX FIFO */ @@ -463,14 +472,6 @@ static int zynqmp_qspi_config_op(struct zynqmp_qspi *xqspi, config_reg = zynqmp_gqspi_read(xqspi, GQSPI_CONFIG_OFST); - /* Set the QSPI clock phase and clock polarity */ - config_reg &= (~GQSPI_CFG_CLK_PHA_MASK) & (~GQSPI_CFG_CLK_POL_MASK); - - if (qspi->mode & SPI_CPHA) - config_reg |= GQSPI_CFG_CLK_PHA_MASK; - if (qspi->mode & SPI_CPOL) - config_reg |= GQSPI_CFG_CLK_POL_MASK; - config_reg &= ~GQSPI_CFG_BAUD_RATE_DIV_MASK; config_reg |= (baud_rate_val << GQSPI_CFG_BAUD_RATE_DIV_SHIFT); zynqmp_gqspi_write(xqspi, GQSPI_CONFIG_OFST, config_reg); @@ -1162,6 +1163,9 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) goto clk_dis_all; } + ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD | + SPI_TX_DUAL | SPI_TX_QUAD; + /* QSPI controller initializations */ zynqmp_qspi_init_hw(xqspi); @@ -1188,8 +1192,6 @@ static int zynqmp_qspi_probe(struct platform_device *pdev) ctlr->setup = zynqmp_qspi_setup_op; ctlr->max_speed_hz = clk_get_rate(xqspi->refclk) / 2; ctlr->bits_per_word_mask = SPI_BPW_MASK(8); - ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_RX_DUAL | SPI_RX_QUAD | - SPI_TX_DUAL | SPI_TX_QUAD; ctlr->dev.of_node = np; ctlr->auto_runtime_pm = true;