[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

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