[QUESTION] MPC8343 'internal only' DMA support

[KRONSTORFER Horst]

> -----Original Message-----
> From: timur.tabi at gmail.com [mailto:timur.tabi at gmail.com] On Behalf Of Timur
Tabi
> Sent: Mittwoch, 20. Oktober 2010 21:45
> To: KRONSTORFER Horst
> Cc: linuxppc-dev at lists.ozlabs.org
> Subject: Re: [QUESTION] MPC8343 'internal only' DMA support
> 
> On Tue, Oct 19, 2010 at 3:15 AM, KRONSTORFER Horst
<Horst.KRONSTORFER at frequentis.com> wrote:
> > i assume the mpc8343 dma controllers ability to do internally
> > controlled operations (csb/csb) is _not_ affected by deactivating
> > externally controlled operations via pinmultiplexing in sicrl.
> >
> > am I correct?
> 
> Hmmm... maybe.  In general, if you want an external master for the DMA
controller, I think you need to
> enable that via various registers.  So if you don't enable external master,
you won't have one.
> 
> Does that answer your question?
> 

no.  i was just wondering if anybody encountered problems with internal dma
operations
when external control was 'deactivated' by setting the appropriate pin
functions to
... let's say ... gpio and actually do arbitrary i/o on that pins.

-h

> --
> Timur Tabi
> Linux kernel developer at Freescale