[U-Boot] [PATCH] fsl_esdhc: Correcting esdhc timeout counter calculation

[Stefano Babic]

On 02/24/2011 11:37 AM, Kumar Gala wrote:
> 
> On Feb 24, 2011, at 2:53 AM, Kumar Gala wrote:
> 
>> From: Priyanka Jain <Priyanka.Jain at freescale.com>
>>
>> - Timeout counter value is set as DTOCV bits in SYSCTL register
>>  For counter value set as x,
>>  Timeout period = (2^(13+x))/SD_CLOCK
>>
>> - As per 4.6.2.2 section of SD Card specification v2.00, host should
>>  cofigure timeout period value to minimum 250 msec.
>>
>> - SD_CLOCK = mmc->trans_speed
>>
>> - Calculating x based on
>>  250 msec = (2^(13+x))/mmc->trans_speed
>>
>> Signed-off-by: Priyanka Jain <Priyanka.Jain at freescale.com>
>> Signed-off-by: Andy Fleming <afleming at freescale.com>
>> Signed-off-by: Kumar Gala <galak at kernel.crashing.org>
>> ---
>> drivers/mmc/fsl_esdhc.c |    5 ++++-
>> 1 files changed, 4 insertions(+), 1 deletions(-)
> 
> Stefano,
> 
> Can you test this on iMX to make sure we didnt break anything there.

Yes, I will test it and I will send my tested-by if everything is ok.

Stefano
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