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author | Yinbo Zhu <yinbo.zhu@nxp.com> | 2019-03-11 02:16:44 +0000 |
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committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-04-15 11:55:54 +0200 |
commit | 5dd195522562542bc6ebe6e7bd47890d8b7ca93c (patch) | |
tree | 4385662c782a5f7cee09e10e470e111534a67922 | |
parent | 05cb6b2a66fa7837211a060878e91be5eb10cb07 (diff) | |
download | linux-5dd195522562542bc6ebe6e7bd47890d8b7ca93c.tar.bz2 |
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>
-rw-r--r-- | drivers/mmc/host/sdhci-of-esdhc.c | 3 |
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; |