On Tue, Jun 09, 2015 at 06:08:24PM +0100, Srinivas Kandagatla wrote:

> >>>+- external	: flag to indicate if the I2S is connected to external codec

> >not sure I understand why we need a boolean property indicating if an
> >external CODEC is in use - what is the consequence of setting this
> >property?

> As of today, the consequence of setting this flag is to setup correct
> dai_link names.
> Also there are some limitations on which MI2S can be configured to external
> or internal codecs, this flag can be used in future to validate such
> configurations, if required.

That validation sounds like something that the SoC drivers should be
doing if required rather than the machine driver - otherwise every
machine driver using this SoC would have to implement the same
validation.