[U-Boot] [PATCH 3/3 V2] MX28: SPI: Add DMA transfer support

Stefano Babic sbabic at denx.de
Mon Jul 16 17:03:18 CEST 2012


On 09/07/2012 12:48, Marek Vasut wrote:
> The DMA transfers happen only if the transfered data are larger
> than 512 bytes. Otherwise PIO is used. This is a small speed
> optimization.
> 
> The DMA transfer doesn't work if unaligned transfer is requested
> due to the limitation of the DMA controller. This has to be fixed
> by introducing generic bounce buffer. Therefore the DMA feature
> is now disabled by default.
> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Fabio Estevam <festevam at gmail.com>
> Cc: Otavio Salvador <otavio at ossystems.com.br>
> Cc: Stefano Babic <sbabic at denx.de>
> Cc: Wolfgang Denk <wd at denx.de>
> ---

Applied to u-boot-imx, next branch, thanks.

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================



More information about the U-Boot mailing list