[alsa-devel] [PATCH RFC 3/8] ASoC: davinci-mcasp: Get DMA related properties from DT

Mark Brown broonie at kernel.org
Fri Sep 13 19:53:54 CEST 2013

On Fri, Sep 13, 2013 at 01:50:31PM +0300, Jyri Sarha wrote:
> On 09/13/2013 01:34 PM, Mark Brown wrote:

> >OK, and presumably this is just part of the main McASP register block
> >and doesn't need to go into DT?

> Not really. For instance on am33xx SoCs the MPU usually accesses
> McASP registers trough L4 interconnect, which is not accessible by
> DMA controller. For DMA controller the data port is also mapped
> trough L3 bus to entirely different address and a simple register
> offset is not enough. Naturally this mapping may change SoC to SoC.

I see.  I don't think this is a problem so long as the bindings are
specified in a way that can be reused with dmaengine, which I'd guess
ought to be the case if it's just specifying a physical address.
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