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VI1PR04MB4543.eurprd04.prod.outlook.com ([fe80::5d07:911b:18e1:1525%4]) with mapi id 15.20.1856.012; Tue, 7 May 2019 09:16:19 +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" CC: dl-linux-imx , "linux-spi@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "dmaengine@vger.kernel.org" , "devicetree@vger.kernel.org" , "kernel@pengutronix.de" Subject: [PATCH v3 07/14] spi: imx: remove ERR009165 workaround on i.mx6ul Thread-Topic: [PATCH v3 07/14] spi: imx: remove ERR009165 workaround on i.mx6ul Thread-Index: AQHVBLWHv8D1fmdXnUup12XR6m92OQ== Date: Tue, 7 May 2019 09:16:19 +0000 Message-ID: <1557249513-4903-8-git-send-email-yibin.gong@nxp.com> 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DQogCWlmIChyZXQpIHsNCiAJCWRldl9lcnIoc3BpX2lteC0+ZGV2LCAiVFggZG1hIGNvbmZpZ3Vy YXRpb24gZmFpbGVkIHdpdGggJWRcbiIsIHJldCk7DQotLSANCjIuNy40DQoNCg== From mboxrd@z Thu Jan 1 00:00:00 1970 From: Robin Gong Subject: [PATCH v3 07/14] spi: imx: remove ERR009165 workaround on i.mx6ul Date: Tue, 7 May 2019 09:16:19 +0000 Message-ID: <1557249513-4903-8-git-send-email-yibin.gong@nxp.com> References: <1557249513-4903-1-git-send-email-yibin.gong@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1557249513-4903-1-git-send-email-yibin.gong@nxp.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org 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" Cc: dl-linux-imx , "linux-spi@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "dmaengine@vger.kernel.org" , "devicetree@vger.kernel.org" , "kernel@pengutronix.de" List-Id: devicetree@vger.kernel.org RVJSMDA5MTY1IGZpeGVkIG9uIGkubXg2dWwvNnVsbC82c2xsLiBBbGwgb3RoZXIgaS5teDYvNyBh bmQNCmkubXg4bS84bW0gc3RpbGwgbmVlZCB0aGlzIGVycmF0YS4gUGxlYXNlIHJlZmVyIHRvIG54 cCBvZmZpY2lhbA0KZXJyYXRhIGRvY3VtZW50IGZyb20gaHR0cHM6Ly93d3cubnhwLmNvbS8gLg0K DQpGb3IgcmVtb3Zpbmcgd29ya2Fyb3VuZCBvbiB0aG9zZSBjaGlwcy4gQWRkIG5ldyBpLm14NnVs IHR5cGUuDQoNClNpZ25lZC1vZmYtYnk6IFJvYmluIEdvbmcgPHlpYmluLmdvbmdAbnhwLmNvbT4N Ci0tLQ0KIGRyaXZlcnMvc3BpL3NwaS1pbXguYyB8IDUwICsrKysrKysrKysrKysrKysrKysrKysr KysrKysrKysrKysrKysrKysrKysrKy0tLS0tDQogMSBmaWxlIGNoYW5nZWQsIDQ1IGluc2VydGlv bnMoKyksIDUgZGVsZXRpb25zKC0pDQoNCmRpZmYgLS1naXQgYS9kcml2ZXJzL3NwaS9zcGktaW14 LmMgYi9kcml2ZXJzL3NwaS9zcGktaW14LmMNCmluZGV4IDY3OTU5MTAuLjkxNjYwZGMgMTAwNjQ0 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+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 07/14] spi: imx: remove ERR009165 workaround on i.mx6ul Thread-Topic: [PATCH v3 07/14] spi: imx: remove ERR009165 workaround on i.mx6ul Thread-Index: AQHVBLWHv8D1fmdXnUup12XR6m92OQ== Date: Tue, 7 May 2019 09:16:19 +0000 Message-ID: <1557249513-4903-8-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 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X-CRM114-Status: GOOD ( 19.92 ) 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" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org ERR009165 fixed on i.mx6ul/6ull/6sll. All other i.mx6/7 and i.mx8m/8mm still need this errata. Please refer to nxp official errata document from https://www.nxp.com/ . For removing workaround on those chips. Add new i.mx6ul type. Signed-off-by: Robin Gong --- drivers/spi/spi-imx.c | 50 +++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 45 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 6795910..91660dc 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -57,6 +57,7 @@ enum spi_imx_devtype { IMX35_CSPI, /* CSPI on all i.mx except above */ IMX51_ECSPI, /* ECSPI on i.mx51 */ IMX53_ECSPI, /* ECSPI on i.mx53 and later */ + IMX6UL_ECSPI, /* ERR009165 fix from i.mx6ul */ }; struct spi_imx_data; @@ -75,6 +76,11 @@ struct spi_imx_devtype_data { bool has_slavemode; unsigned int fifo_size; bool dynamic_burst; + /* + * ERR009165 fixed or not: + * https://www.nxp.com/docs/en/errata/IMX6DQCE.pdf + */ + bool tx_glitch_fixed; enum spi_imx_devtype devtype; }; @@ -128,7 +134,8 @@ static inline int is_imx35_cspi(struct spi_imx_data *d) static inline int is_imx51_ecspi(struct spi_imx_data *d) { - return d->devtype_data->devtype == IMX51_ECSPI; + return d->devtype_data->devtype == IMX51_ECSPI || + d->devtype_data->devtype == IMX6UL_ECSPI; } static inline int is_imx53_ecspi(struct spi_imx_data *d) @@ -585,9 +592,16 @@ 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; + /* + * ERR009165: work in XHC mode instead of SMC as PIO on the chips + * before i.mx6ul. + */ + if (spi_imx->usedma) { + if (spi_imx->devtype_data->tx_glitch_fixed) + ctrl |= MX51_ECSPI_CTRL_SMC; + else + ctrl &= ~MX51_ECSPI_CTRL_SMC; + } writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL); @@ -615,6 +629,8 @@ static void mx51_setup_wml(struct spi_imx_data *spi_imx) { u32 tx_wml = 0; + if (spi_imx->devtype_data->tx_glitch_fixed) + tx_wml = spi_imx->wml; /* * Configure the DMA register: setup the watermark * and enable DMA request. @@ -1012,6 +1028,23 @@ static struct spi_imx_devtype_data imx53_ecspi_devtype_data = { .devtype = IMX53_ECSPI, }; +static struct spi_imx_devtype_data imx6ul_ecspi_devtype_data = { + .intctrl = mx51_ecspi_intctrl, + .prepare_message = mx51_ecspi_prepare_message, + .prepare_transfer = mx51_ecspi_prepare_transfer, + .trigger = mx51_ecspi_trigger, + .rx_available = mx51_ecspi_rx_available, + .reset = mx51_ecspi_reset, + .setup_wml = mx51_setup_wml, + .fifo_size = 64, + .has_dmamode = true, + .dynamic_burst = true, + .has_slavemode = true, + .tx_glitch_fixed = true, + .disable = mx51_ecspi_disable, + .devtype = IMX6UL_ECSPI, +}; + static const struct platform_device_id spi_imx_devtype[] = { { .name = "imx1-cspi", @@ -1035,6 +1068,9 @@ static const struct platform_device_id spi_imx_devtype[] = { .name = "imx53-ecspi", .driver_data = (kernel_ulong_t) &imx53_ecspi_devtype_data, }, { + .name = "imx6ul-ecspi", + .driver_data = (kernel_ulong_t) &imx6ul_ecspi_devtype_data, + }, { /* sentinel */ } }; @@ -1047,6 +1083,7 @@ static const struct of_device_id spi_imx_dt_ids[] = { { .compatible = "fsl,imx35-cspi", .data = &imx35_cspi_devtype_data, }, { .compatible = "fsl,imx51-ecspi", .data = &imx51_ecspi_devtype_data, }, { .compatible = "fsl,imx53-ecspi", .data = &imx53_ecspi_devtype_data, }, + { .compatible = "fsl,imx6ul-ecspi", .data = &imx6ul_ecspi_devtype_data, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, spi_imx_dt_ids); @@ -1178,7 +1215,10 @@ static int spi_imx_dma_configure(struct spi_master *master) * 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; + if (spi_imx->devtype_data->tx_glitch_fixed) + tx.dst_maxburst = spi_imx->wml; + else + 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); -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel