[U-Boot] [PATCH 5/7] omap_gpmc: use SOFTECC in SPL if it's enabled

[Simon Schwarz]

Hi Ilya,

On 10/20/2011 05:23 PM, Ilya Yanok wrote:
 > Hi Simon,
 >
 > On 20.10.2011 16:00, Simon Schwarz wrote:
 >>> Use software ECC for the SPL build if support for software ECC in 
SPL is
 >>> enabled.
 >>
 >> I'am curious: Is there a special reason for having software ecc in SPL?
 >
 > Well, yes. On OMAP2+ ECC mode defaults to software (incompatible with HW
 > mode; 256 vs 512 bytes block size) both in U-Boot and Linux (U-Boot has
 > command to change it while in Linux you have to recompile the kernel).
 >
 > So we need software ecc to read images written from Linux.

ok. Agreed.

Another thing just poped into my mind, ATM I have a DMA patch for 
devkit8000 on the ML:
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/109744
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/112661

It speeds up the process of copying the u-boot/linux image. ATM this is 
in combination with HW ecc and I doubt that it will work seamlessly with 
SW-ecc, yet. However IMHO DMA in combination with SW-ecc could be nearly 
as fast as using HW-ecc.

So maybe an adaption is worth a try?

Regards
Simon