From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 103A4C07E95 for ; Tue, 13 Jul 2021 10:35:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EAA84600D1 for ; Tue, 13 Jul 2021 10:35:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235607AbhGMKhw (ORCPT ); Tue, 13 Jul 2021 06:37:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235536AbhGMKht (ORCPT ); Tue, 13 Jul 2021 06:37:49 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B89BC0613DD for ; Tue, 13 Jul 2021 03:34:59 -0700 (PDT) Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=[IPv6:::1]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1m3FkW-0001lP-3A; Tue, 13 Jul 2021 12:34:48 +0200 Message-ID: <338c8a458b97799d47d9686634d35f75b408ea47.camel@pengutronix.de> Subject: Re: [PATCH v15 08/12] spi: imx: remove ERR009165 workaround on i.mx6ul From: Lucas Stach To: Robin Gong , vkoul@kernel.org, mark.rutland@arm.com, broonie@kernel.org, robh+dt@kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, shawnguo@kernel.org, festevam@gmail.com, s.hauer@pengutronix.de, martin.fuzzey@flowbird.group, u.kleine-koenig@pengutronix.de, dan.j.williams@intel.com, matthias.schiffer@ew.tq-group.com, frieder.schrempf@kontron.de, m.felsch@pengutronix.de, xiaoning.wang@nxp.com Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org Date: Tue, 13 Jul 2021 12:34:46 +0200 In-Reply-To: <1626201709-19643-9-git-send-email-yibin.gong@nxp.com> References: <1626201709-19643-1-git-send-email-yibin.gong@nxp.com> <1626201709-19643-9-git-send-email-yibin.gong@nxp.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.40.1 (3.40.1-1.fc34) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 2001:67c:670:201:5054:ff:fe8d:eefb X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-spi@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Am Mittwoch, dem 14.07.2021 um 02:41 +0800 schrieb Robin Gong: > 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 > Acked-by: Mark Brown Reviewed-by: Lucas Stach > --- > drivers/spi/spi-imx.c | 39 ++++++++++++++++++++++++++++++++++++--- > 1 file changed, 36 insertions(+), 3 deletions(-) > > diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c > index 61e4fa0..63a8d7b 100644 > --- a/drivers/spi/spi-imx.c > +++ b/drivers/spi/spi-imx.c > @@ -77,6 +77,11 @@ 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; > }; > > @@ -608,8 +613,14 @@ static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx, > ctrl |= mx51_ecspi_clkdiv(spi_imx, spi_imx->spi_bus_clk, &clk); > spi_imx->spi_bus_clk = clk; > > - /* ERR009165: work in XHC mode as PIO */ > - 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 && 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); > > @@ -618,12 +629,16 @@ 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; > + > + if (spi_imx->devtype_data->tx_glitch_fixed) > + tx_wml = spi_imx->wml; > /* > * 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(0) | > + 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); > @@ -1014,6 +1029,23 @@ 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 = IMX51_ECSPI, > +}; > + > static const struct of_device_id spi_imx_dt_ids[] = { > { .compatible = "fsl,imx1-cspi", .data = &imx1_cspi_devtype_data, }, > { .compatible = "fsl,imx21-cspi", .data = &imx21_cspi_devtype_data, }, > @@ -1022,6 +1054,7 @@ 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);