lkml.org 
[lkml]   [2008]   [Jan]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 6/6] atmel_serial: Add DMA support
On Wed, 23 Jan 2008 14:52:55 +0100
Marc Pignat <marc.pignat@hevs.ch> wrote:

> On Wednesday 23 January 2008, Haavard Skinnemoen wrote:
> > On Wed, 23 Jan 2008 14:18:38 +0100
> ...
> > GFP_DMA doesn't have anything to do with alignment, AFAIK.
> I don't even know if it does something for at91 or avr32, but there is a flag
> for dma memory, so we should use it.

No, I think GFP_DMA is for legacy ISA DMA and other DMA controllers
with addressing limitations. The PDC is capable of accessing the full
32-bit physical address space on both AT91 and AVR32, so no special DMA
flags are needed.

Haavard


\
 
 \ /
  Last update: 2008-01-23 15:09    [W:0.041 / U:0.464 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site