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authorYinbo Zhu <yinbo.zhu@nxp.com>2019-03-11 03:16:44 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2019-04-15 11:55:54 +0200
commit5dd195522562542bc6ebe6e7bd47890d8b7ca93c (patch)
tree4385662c782a5f7cee09e10e470e111534a67922 /drivers/mmc/host/sdhci-of-esdhc.c
parentmmc: sdhci-of-esdhc: add erratum eSDHC-A001 and A-008358 support (diff)
downloadlinux-5dd195522562542bc6ebe6e7bd47890d8b7ca93c.tar.xz
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mmc: sdhci-of-esdhc: add erratum A-009204 support
In the event of that any data error (like, IRQSTAT[DCE]) occurs during an eSDHC data transaction where DMA is used for data transfer to/from the system memory, setting the SYSCTL[RSTD] register may cause a system hang. If software sets the register SYSCTL[RSTD] to 1 for error recovery while DMA transferring is not complete, eSDHC may hang the system bus. This happens because the software register SYSCTL[RSTD] resets the DMA engine without waiting for the completion of pending system transactions. This erratum is to fix this issue. Signed-off-by: Yinbo Zhu <yinbo.zhu@nxp.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-of-esdhc.c')
-rw-r--r--drivers/mmc/host/sdhci-of-esdhc.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 04d7d95e9bba..57a44896668a 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -694,6 +694,9 @@ static void esdhc_reset(struct sdhci_host *host, u8 mask)
sdhci_writel(host, host->ier, SDHCI_INT_ENABLE);
sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
+ if (of_find_compatible_node(NULL, NULL, "fsl,p2020-esdhc"))
+ mdelay(5);
+
if (mask & SDHCI_RESET_ALL) {
val = sdhci_readl(host, ESDHC_TBCTL);
val &= ~ESDHC_TB_EN;