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Tue, 10 Mar 2020 03:31:10 +0000 From: Robin Gong To: s.hauer@pengutronix.de, vkoul@kernel.org, shawnguo@kernel.org, u.kleine-koenig@pengutronix.de, broonie@kernel.org, robh+dt@kernel.org, festevam@gmail.com, dan.j.williams@intel.com, mark.rutland@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, l.stach@pengutronix.de, martin.fuzzey@flowbird.group Cc: kernel@pengutronix.de, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-imx@nxp.com, dmaengine@vger.kernel.org, devicetree@vger.kernel.org Subject: [RESEND v6 06/13] spi: imx: fix ERR009165 Date: Tue, 10 Mar 2020 19:31:55 +0800 Message-Id: <1583839922-22699-7-git-send-email-yibin.gong@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1583839922-22699-1-git-send-email-yibin.gong@nxp.com> References: <1583839922-22699-1-git-send-email-yibin.gong@nxp.com> Content-Type: text/plain X-ClientProxiedBy: SG2PR06CA0241.apcprd06.prod.outlook.com (2603:1096:4:ac::25) To VE1PR04MB6638.eurprd04.prod.outlook.com (2603:10a6:803:119::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from robin-OptiPlex-790.ap.freescale.net (119.31.174.66) by SG2PR06CA0241.apcprd06.prod.outlook.com (2603:1096:4:ac::25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.2793.15 via Frontend Transport; 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X-Microsoft-Antispam-Message-Info: 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 X-MS-Exchange-AntiSpam-MessageData: 7KqrrwKDOSpua90VRT9mHVBXK+KclsrwIAY03yAEgh5VYHs1GASrP1k4LbFIABmQL9y7iWYaNrTN2hDX1J8LRYJLmwO5u4UqGN5BqCX78bWHF0J33ClUE7Sd6ej1TecEeQXc5o0cnKEdZCrea5dOyg== X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7e954aac-743f-4e0f-f335-08d7c4a37a33 X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Mar 2020 03:31:10.8680 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: fM0zn08uhhM13YItIx14ep523IIMqz77jxZrbZquB31P5J9ft+/ZEeB2N8jxHnzdrVdeo9mNCDU2K8uM2RVs5g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VE1PR04MB6621 Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Change to XCH mode even in dma mode, please refer to the below errata: https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf Signed-off-by: Robin Gong Acked-by: Mark Brown --- drivers/spi/spi-imx.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index f4f28a4..842a86e 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -585,8 +585,9 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx, ctrl |= mx51_ecspi_clkdiv(spi_imx, t->speed_hz, &clk); spi_imx->spi_bus_clk = clk; + /* ERR009165: work in XHC mode as PIO */ if (spi_imx->usedma) - ctrl |= MX51_ECSPI_CTRL_SMC; + ctrl &= ~MX51_ECSPI_CTRL_SMC; writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL); @@ -612,12 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx, static void mx51_setup_wml(struct spi_imx_data *spi_imx) { + u32 tx_wml = 0; + /* * Configure the DMA register: setup the watermark * and enable DMA request. */ writel(MX51_ECSPI_DMA_RX_WML(spi_imx->wml - 1) | - MX51_ECSPI_DMA_TX_WML(spi_imx->wml) | + MX51_ECSPI_DMA_TX_WML(tx_wml) | MX51_ECSPI_DMA_RXT_WML(spi_imx->wml) | MX51_ECSPI_DMA_TEDEN | MX51_ECSPI_DMA_RXDEN | MX51_ECSPI_DMA_RXTDEN, spi_imx->base + MX51_ECSPI_DMA); @@ -1171,7 +1174,11 @@ static int spi_imx_dma_configure(struct spi_master *master) tx.direction = DMA_MEM_TO_DEV; tx.dst_addr = spi_imx->base_phys + MXC_CSPITXDATA; tx.dst_addr_width = buswidth; - tx.dst_maxburst = spi_imx->wml; + /* + * For ERR009165 with tx_wml = 0 could enlarge burst size to fifo size + * to speed up fifo filling as possible. + */ + tx.dst_maxburst = spi_imx->devtype_data->fifo_size; ret = dmaengine_slave_config(master->dma_tx, &tx); if (ret) { dev_err(spi_imx->dev, "TX dma configuration failed with %d\n", ret); @@ -1265,10 +1272,6 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx, { int ret; - /* use pio mode for i.mx6dl chip TKT238285 */ - if (of_machine_is_compatible("fsl,imx6dl")) - return 0; - spi_imx->wml = spi_imx->devtype_data->fifo_size / 2; /* Prepare for TX DMA: */ -- 2.7.4