diff options
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 6b0967fb8dcd..c498da5b46b2 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2119,8 +2119,16 @@ static void __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode) ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); if (!(ctrl & SDHCI_CTRL_EXEC_TUNING)) { - if (ctrl & SDHCI_CTRL_TUNED_CLK) + if (ctrl & SDHCI_CTRL_TUNED_CLK) { + /* + * need to wait some time, make sure sd/mmc fininsh + * send out tuning data, otherwise, the sd/mmc can't + * response to any command when the card still out + * put the tuning data. + */ + mdelay(1); return; /* Success! */ + } break; } |