[U-Boot] [PATCH v2] ppc/85xx: PIO Support for FSL eSDHC Controller Driver
Wolfgang Denk
wd at denx.de
Tue Sep 22 22:17:03 CEST 2009
Dear Dipen Dudhat,
In message <1252904203-9129-1-git-send-email-dipen.dudhat at freescale.com> you wrote:
> On some Freescale SoC Internal DMA of eSDHC controller has bug.
>
> So PIO Mode has introduced to do data transfer using CPU.
> In PIO mode data transfer performance will be degraded by a large extent.
>
> Note:
> In PIO mode multiple block read/write requires delay to complete the transfer.
>
> Signed-off-by: Dipen Dudhat <dipen.dudhat at freescale.com>
My comments to v1 of the patch still apply.
Best regards,
Wolfgang Denk
--
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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