Messages in this thread | | | Date | Wed, 23 Jan 2008 15:05:11 +0100 | From | Haavard Skinnemoen <> | Subject | Re: [PATCH 6/6] atmel_serial: Add DMA support |
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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
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