[U-Boot] [v2] mmc: send CMD0 before CMD1 for some MMC cards

[Jaehoon Chung]

Hi Yangbo,

On 08/09/2016 08:06 AM, Jaehoon Chung wrote:
> Hi Yangbo,
> 
> On 08/02/2016 04:33 PM, Yangbo Lu wrote:
>> 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.
> 
> This patch is not bad.. but i need to verify more about entire sequence.
> Could you wait a bit?

Applied on u-boot-mmc. Thanks!

Best Regards,
Jaehoon Chung

> 
> Best Regards,
> Jaehoon Chung
> 
>>
>> Signed-off-by: Yangbo Lu <yangbo.lu at nxp.com>
>> ---
>>  drivers/mmc/mmc.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
>> index f8e5f7a..d4e96bc 100644
>> --- a/drivers/mmc/mmc.c
>> +++ b/drivers/mmc/mmc.c
>> @@ -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);
>>
> 
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>