diff options
| author | Ryan QIAN <b32804@freescale.com> | 2013-01-16 10:23:28 +0800 |
|---|---|---|
| committer | Nitin Garg <nitin.garg@freescale.com> | 2014-04-16 08:47:09 -0500 |
| commit | 59dcd71f323dde9ddc019baad92362a65b0e2b54 (patch) | |
| tree | 9f664f704397dd5caad0e40018e62e0078a8e413 /drivers/mmc | |
| parent | abb2e8ce1ed2df677fa16ff99041474f22648eba (diff) | |
ENGR00287331-1 mmc: add delay after CMD6 befoer sending CMD13 for sandisk
- Some sandisk emmc cards need certain delay befor sending cmd13 after cmd6.
Original CR: ENGR174296 (commit: fd031f9)
Acked-by: Aisheng Dong <b29396@freescale.com>
Signed-off-by: Ryan QIAN <b32804@freescale.com>
(cherry picked from commit f942bf1db36355d46f38792601594949f3f2c71b)
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 49f04bc9d0eb..83d17a9daea0 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -440,6 +440,12 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value, if (!use_busy_signal) return 0; + /* + * WORKAROUND: for Sandisk eMMC cards, it might need certain delay + * before sending CMD13 after CMD6 + */ + mdelay(1); + /* Must check status to be sure of no errors */ timeout = jiffies + msecs_to_jiffies(MMC_OPS_TIMEOUT_MS); do { |