From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [PATCH v2] mmc: sdhci-of-esdhc: fix eMMC couldn't work after kexec Date: Wed, 8 Nov 2017 17:09:50 +0800 Message-ID: <20171108090950.4900-1-yinbo.zhu@nxp.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from mail-co1nam03on0067.outbound.protection.outlook.com ([104.47.40.67]:47872 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751295AbdKHJ2H (ORCPT ); Wed, 8 Nov 2017 04:28:07 -0500 Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: yinbo.zhu@nxp.com, Adrian Hunter Cc: linux-mmc@vger.kernel.org, yangbo.lu@nxp.com From: "yinbo.zhu" The bit eSDHC_TBCTL[TB_EN] couldn't be reset by eSDHC_SYSCTL[RSTA] which is used to reset for all. The driver should make sure it's cleared before card initialization, otherwise the initialization would fail. Signed-off-by: yinbo.zhu --- Change in v2: Replace ESDHC_TB_DIS with default register bit ESDHC_TB_EN drivers/mmc/host/sdhci-of-esdhc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index d96a057a7db8..023c24bd0d94 100644 --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -783,6 +783,10 @@ static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host) pltfm_host = sdhci_priv(host); esdhc = sdhci_pltfm_priv(pltfm_host); + val = sdhci_readl(host, ESDHC_TBCTL); + val &= ~ESDHC_TB_EN; + sdhci_writel(host, val, ESDHC_TBCTL); + host_ver = sdhci_readw(host, SDHCI_HOST_VERSION); esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >> SDHCI_VENDOR_VER_SHIFT; -- 2.14.1