From patchwork Wed Aug 18 11:16:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bough Chen X-Patchwork-Id: 499283 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 178BDC432BE for ; Wed, 18 Aug 2021 11:38:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE026610A7 for ; Wed, 18 Aug 2021 11:38:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233798AbhHRLjX (ORCPT ); Wed, 18 Aug 2021 07:39:23 -0400 Received: from inva021.nxp.com ([92.121.34.21]:41152 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235627AbhHRLjW (ORCPT ); Wed, 18 Aug 2021 07:39:22 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 90887205147; Wed, 18 Aug 2021 13:38:47 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 58A1C201500; Wed, 18 Aug 2021 13:38:47 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id C9841183AD05; Wed, 18 Aug 2021 19:38:45 +0800 (+08) From: haibo.chen@nxp.com To: adrian.hunter@intel.com, ulf.hansson@linaro.org, shawnguo@kernel.org, robh+dt@kernel.org, s.hauer@pengutronix.de Cc: kernel@pengutronix.de, festevam@gmail.com, linux-mmc@vger.kernel.org, linux-imx@nxp.com, haibo.chen@nxp.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 4/6] mmc: host: sdhci-esdhc-imx.c: disable auto-tuning when necessary Date: Wed, 18 Aug 2021 19:16:53 +0800 Message-Id: <1629285415-7495-4-git-send-email-haibo.chen@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1629285415-7495-1-git-send-email-haibo.chen@nxp.com> References: <1629285415-7495-1-git-send-email-haibo.chen@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Haibo Chen Add a method to enable/disable auto-tuning function. auto-tuning function is conflict with sdio interrupt. For sdio device with sdio interrupt, need to disable auto-tuning function. Signed-off-by: Haibo Chen --- drivers/mmc/host/sdhci-esdhc-imx.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index f18d169bc8ff..3af6519c561b 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -226,6 +226,7 @@ struct esdhc_platform_data { unsigned int tuning_step; /* The delay cell steps in tuning procedure */ unsigned int tuning_start_tap; /* The start delay cell point in tuning procedure */ unsigned int strobe_dll_delay_target; /* The delay cell for strobe pad (read clock) */ + bool broken_auto_tuning; /* Disable the auto tuning circuit */ }; struct esdhc_soc_data { @@ -672,8 +673,10 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg) if (val & SDHCI_CTRL_EXEC_TUNING) { v |= ESDHC_MIX_CTRL_EXE_TUNE; m |= ESDHC_MIX_CTRL_FBCLK_SEL; - m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; - usdhc_auto_tuning_mode_sel(host); + if (!imx_data->boarddata.broken_auto_tuning) { + usdhc_auto_tuning_mode_sel(host); + m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; + } } else { v &= ~ESDHC_MIX_CTRL_EXE_TUNE; } @@ -1041,13 +1044,16 @@ static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val) static void esdhc_post_tuning(struct sdhci_host *host) { + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host); u32 reg; - usdhc_auto_tuning_mode_sel(host); - reg = readl(host->ioaddr + ESDHC_MIX_CTRL); reg &= ~ESDHC_MIX_CTRL_EXE_TUNE; - reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; + if (!imx_data->boarddata.broken_auto_tuning) { + usdhc_auto_tuning_mode_sel(host); + reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN; + } writel(reg, host->ioaddr + ESDHC_MIX_CTRL); } @@ -1522,7 +1528,8 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, of_property_read_u32(np, "fsl,tuning-step", &boarddata->tuning_step); of_property_read_u32(np, "fsl,tuning-start-tap", &boarddata->tuning_start_tap); - + if (of_property_read_bool(np, "fsl,broken-auto-tuning")) + boarddata->broken_auto_tuning = true; of_property_read_u32(np, "fsl,strobe-dll-delay-target", &boarddata->strobe_dll_delay_target); if (of_find_property(np, "no-1-8-v", NULL))