McBSP in Multi Channel mode

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Hello,

I'm new to kernel development and so I'm a bit confused on how to do
things here. I need to use the McBSP with Multi-Channel enabled and
using DMA to transfer the data.

The data will be PCM sound and I will have 4 cards attached to this
McBSP. I'm using OMAP35xx.

>From what I've seen, I have to change the files:
 - arch/arm/plat-omap/mcbsp.c
 - arch/arm/mach-omap2/mcbsp.c
to support multi channel. Is that it? or I would need more changes?

Is there something that I would need to change in DMA implementation?
Do you know where I can get an example or documentation?

Thanks,
Fernando
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