mmc: sdhci-of-esdhc: fix the mmc error after sleep on ls1046ardb

commit f2bc600008bd6f7f5d0b6b56238d14f95cd454d2 upstream.

When system wakes up from sleep on ls1046ardb, the SD operation fails
with mmc error messages since ESDHC_TB_EN bit couldn't be cleaned by
eSDHC_SYSCTL[RSTA]. It's proper to clean this bit in esdhc_reset()
rather than in probe.

Signed-off-by: yinbo.zhu <yinbo.zhu@nxp.com>
Acked-by: Yangbo Lu <yangbo.lu@nxp.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index d74030f3bd126863663410ef0d76e5f52d3b8d7f..4ffa6b173a21ef4a09a62108830869de16095ee2 100644 (file)
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -589,10 +589,18 @@ static void esdhc_pltfm_set_bus_width(struct sdhci_host *host, int width)
 
 static void esdhc_reset(struct sdhci_host *host, u8 mask)
 {
+       u32 val;
+
        sdhci_reset(host, mask);
 
        sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
        sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+
+       if (mask & SDHCI_RESET_ALL) {
+               val = sdhci_readl(host, ESDHC_TBCTL);
+               val &= ~ESDHC_TB_EN;
+               sdhci_writel(host, val, ESDHC_TBCTL);
+       }
 }
 
 /* The SCFG, Supplemental Configuration Unit, provides SoC specific
@@ -785,10 +793,6 @@ 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;