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mmc: send CMD0 before CMD1 for some MMC cards

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When the MMC framework was added in u-boot, the mmc_go_idle was
added before mmc_send_op_cond_iter in function mmc_send_op_cond
annotating that some cards seemed to need this. Actually, we still
need to do this in function mmc_complete_op_cond for those cards.
This has been verified on Micron MTFC4GACAECN eMMC chip.

Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
This commit is contained in:
Yangbo Lu 2016-08-02 15:33:18 +08:00 committed by Jaehoon Chung
parent ba92cd74d2
commit d188b11302
1 changed files with 3 additions and 0 deletions
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3
drivers/mmc/mmc.c
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@ -422,6 +422,9 @@ static int mmc_complete_op_cond(struct mmc *mmc)
mmc->op_cond_pending = 0;
if (!(mmc->ocr & OCR_BUSY)) {
/* Some cards seem to need this */
mmc_go_idle(mmc);
start = get_timer(0);
while (1) {
err = mmc_send_op_cond_iter(mmc, 1);