* [QUESTION] MPC8343 'internal only' DMA support
@ 2010-10-19 8:15 ` KRONSTORFER Horst
2010-10-20 19:45 ` Timur Tabi
0 siblings, 1 reply; 3+ messages in thread
From: KRONSTORFER Horst @ 2010-10-19 8:15 UTC (permalink / raw)
To: linuxppc-dev
hi!
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?=20
thanks
horst kronstorfer
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [QUESTION] MPC8343 'internal only' DMA support
2010-10-19 8:15 ` [QUESTION] MPC8343 'internal only' DMA support KRONSTORFER Horst
@ 2010-10-20 19:45 ` Timur Tabi
2010-10-21 10:49 ` KRONSTORFER Horst
0 siblings, 1 reply; 3+ messages in thread
From: Timur Tabi @ 2010-10-20 19:45 UTC (permalink / raw)
To: KRONSTORFER Horst; +Cc: linuxppc-dev
On Tue, Oct 19, 2010 at 3:15 AM, KRONSTORFER Horst
<Horst.KRONSTORFER@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?
--
Timur Tabi
Linux kernel developer at Freescale
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: [QUESTION] MPC8343 'internal only' DMA support
2010-10-20 19:45 ` Timur Tabi
@ 2010-10-21 10:49 ` KRONSTORFER Horst
0 siblings, 0 replies; 3+ messages in thread
From: KRONSTORFER Horst @ 2010-10-21 10:49 UTC (permalink / raw)
To: Timur Tabi; +Cc: linuxppc-dev
> -----Original Message-----
> From: timur.tabi@gmail.com [mailto:timur.tabi@gmail.com] On Behalf Of =
Timur
Tabi
> Sent: Mittwoch, 20. Oktober 2010 21:45
> To: KRONSTORFER Horst
> Cc: linuxppc-dev@lists.ozlabs.org
> Subject: Re: [QUESTION] MPC8343 'internal only' DMA support
>=20
> On Tue, Oct 19, 2010 at 3:15 AM, KRONSTORFER Horst
<Horst.KRONSTORFER@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?
>=20
> 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.
>=20
> Does that answer your question?
>=20
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
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2010-10-19 8:15 ` [QUESTION] MPC8343 'internal only' DMA support KRONSTORFER Horst
2010-10-20 19:45 ` Timur Tabi
2010-10-21 10:49 ` KRONSTORFER Horst
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