[alsa-devel] [PATCH 1/2] dt-bindings: Document STM32 I2S bindings

[Mark Brown]

On Wed, Apr 12, 2017 at 08:30:31AM +0000, Olivier MOYSAN wrote:
> On 04/11/2017 11:10 PM, Mark Brown wrote:

> > That sounds wrong, I'd expect this wiring to be done statically as part
> > of the .dtsi for the SoC (or just grabbed as needed at runtime if
> > things are flexbile enough) rather than being a configuration thing done
> > per board...  I had thought that this was configuration reflecting
> > different ways of taping out the IP with different feature sets, is that
> > not the case?

> This configuration is board dependent. The IP may be used as rx, tx or 
> fd depending on board. So I think it can make sense to have a DMA 
> configuration linked to board, and to set IP mode accordingly.

It is totally normal to just not use one direction in a given system, we
don't normally need to do anything special to handle things.  I'm a bit
confused as to what's different here and needs configuring?
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