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

Wolfgang Denk wd at denx.de
Fri Feb 25 06:35:44 CET 2011


Dear Andy Fleming,

In message <AANLkTimCt=qiPDC9s2BMYy4nM5R+JWcBiaLLnFo_WA9X at mail.gmail.com> you wrote:
>
> Yeah, that took me a while, too.  Maybe we should update it to make clear:
>
> 1) The formula ends up being (2^(13 + timeout))/mmc->trans_speed = (1/4) seconds
> --> 2^(13 + timeout) = mmc->trans_speed/4
> --> 13 + timeout = log2(mmc->trans_speed/4)
> ...etc

Does this not depend on the units used for speed, and thus in the end
on CONFIC_SYS_HZ ?

Best regards,

Wolfgang Denk

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