From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40234 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935998AbeBUNFR (ORCPT ); Wed, 21 Feb 2018 08:05:17 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "yinbo.zhu" , Adrian Hunter , Ulf Hansson , Rasmus Villemoes Subject: [PATCH 4.14 164/167] mmc: sdhci-of-esdhc: fix eMMC couldnt work after kexec Date: Wed, 21 Feb 2018 13:49:35 +0100 Message-Id: <20180221124533.823064941@linuxfoundation.org> In-Reply-To: <20180221124524.639039577@linuxfoundation.org> References: <20180221124524.639039577@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: yinbo.zhu commit 97618aca1440b5addc5c3d78659d3e176be23b80 upstream. 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 Acked-by: Adrian Hunter Signed-off-by: Ulf Hansson Cc: Rasmus Villemoes Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/sdhci-of-esdhc.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/mmc/host/sdhci-of-esdhc.c +++ b/drivers/mmc/host/sdhci-of-esdhc.c @@ -785,6 +785,10 @@ static void esdhc_init(struct platform_d 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;