From: yinbo.zhu Date: Wed, 8 Nov 2017 09:09:50 +0000 (+0800) Subject: mmc: sdhci-of-esdhc: fix eMMC couldn't work after kexec X-Git-Tag: v4.16-rc1~189^2~99 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=97618aca1440b5addc5c3d78659d3e176be23b80;p=linux.git mmc: sdhci-of-esdhc: fix eMMC couldn't work after kexec 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 --- diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c index 1f424374bbbb..d74030f3bd12 100644 --- 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_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;