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mmc: increase delay when initializing mmc 

Running TF-A 2.0 and later seems to cause a regression on HiKey 620.

    NOTICE:  BL2: v2.0(release):v2.0
    NOTICE:  BL2: Built : 17:41:23, Dec 17 2018
    NOTICE:  acpu_dvfs_set_freq: set acpu freq success!ERROR:   CMD1 failed after 100 retries
    ERROR:   BL2: Failed to load image (-5)

The reason seems to be that during emmc enumeration when BL2 sends the command
    OCR_SECTOR_MODE | OCR_VDD_MIN_2V7 | OCR_VDD_MIN_1V7

it for some reason takes some more time to get a reply. So a delay with
mdelay(1), seems to not be enough any longer and therefore we increase it to
mdelay(10) instead which makes the device boot as expected again.

Signed-off-by: Joakim Bech <joakim.bech@linaro.org>
This commit is contained in:
Joakim Bech 2018-12-18 10:09:02 +01:00
parent 4f7812e7ac
commit 7d6394297d
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/mmc.c
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@ -404,7 +404,7 @@ static int mmc_send_op_cond(void)
return 0;
}
mdelay(1);
mdelay(10);
}
ERROR("CMD1 failed after %d retries\n", SEND_OP_COND_MAX_RETRIES);