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Tue, 7 May 2019 09:16:13 +0000 From: Robin Gong To: "robh@kernel.org" , "broonie@kernel.org" , "shawnguo@kernel.org" , "s.hauer@pengutronix.de" , "festevam@gmail.com" , "mark.rutland@arm.com" , "u.kleine-koenig@pengutronix.de" , "plyatov@gmail.com" , "vkoul@kernel.org" , "dan.j.williams@intel.com" , "catalin.marinas@arm.com" , "will.deacon@arm.com" , "l.stach@pengutronix.de" Subject: [PATCH v3 06/14] spi: imx: fix ERR009165 Thread-Topic: [PATCH v3 06/14] spi: imx: fix ERR009165 Thread-Index: AQHVBLWEuFpHOQnu6U2WCKaGedJC3w== Date: Tue, 7 May 2019 09:16:13 +0000 Message-ID: <1557249513-4903-7-git-send-email-yibin.gong@nxp.com> References: <1557249513-4903-1-git-send-email-yibin.gong@nxp.com> In-Reply-To: <1557249513-4903-1-git-send-email-yibin.gong@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.7.4 x-clientproxiedby: HK2PR04CA0088.apcprd04.prod.outlook.com (2603:1096:202:15::32) To VI1PR04MB4543.eurprd04.prod.outlook.com (2603:10a6:803:6d::26) authentication-results: spf=none (sender IP is ) smtp.mailfrom=yibin.gong@nxp.com; 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DIR:OUT; SFP:1101; SCL:1; SRVR:VI1PR04MB5005; H:VI1PR04MB4543.eurprd04.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1; received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: Lmr+FY3+TChpLev9OPRQxuCRYLzA5C+q2anrx+MEPkhtaIgmxj6x3ldlV6hL7oH+jJtYLOnXQMhjFbyZK/3kWEyxWHim6IFK6sa3x6xv1mGHzHq8FTyFSU+ed8NC6qonEFb3qn83DnxHM7mCUV1VzZpRNzqFvkCeSvgx8H6o2pMYO9jy2jocRq1Lt8oiKeERupfJuQuIbnGc1DvEFjSoW2TvsovJsuUd1kJhde1qIZLy03zyoq6GAM87xnShlSuEk5LhEGckmHiaX/FtKd83VbkOKTlizqfdMOw+lYno55igkksmNZi3FujnQRqgS3+HKqpZUVsKuEv6YBT6zJ8ibxU6C0v26c6W5A1dmCU/e5KgB4TO876tFHJZQBm4koyuHgxbL4iQXSexN8xbfb3SSiAOKuQ0+VCurDtWG55mp8w= MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: e7451482-eede-4d7a-978e-08d6d2cca698 X-MS-Exchange-CrossTenant-originalarrivaltime: 07 May 2019 09:16:13.1954 (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-Transport-CrossTenantHeadersStamped: VI1PR04MB5005 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190507_021633_617768_D3326CEB X-CRM114-Status: GOOD ( 16.38 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-spi@vger.kernel.org" , dl-linux-imx , "kernel@pengutronix.de" , "dmaengine@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 09c9a1e..6795910 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: */