[alsa-devel] [PATCH RFC] ASoC: simple-card: Update clocks binding for simple-card DAI subnodes

[Mark Brown]

On Mon, Sep 28, 2015 at 09:49:35PM +0300, Jyri Sarha wrote:
> On 09/19/15 21:42, Mark Brown wrote:

> >What's the use case again?  Can we address this by converting the
> >relevant drivers to the clock API (or improving their clock API
> >support)?

> Sorry, I forgot to reply this earlier. The reason why we need this is the
> way McASP driver uses and provides clocks for different purposes. The most
> pressing need is to be able to select if we want to use some external clock
> pin as an input for McASP clock divider that produces the i2s bit-clock or
> if we want to use McASP's internal clock source.

> There are several other things this binding would allow us, and others with
> flexible i2s HW, to do. Some TI codecs would also benefit from a flexible
> way of describing the used clock configuration, but Peter know that part
> better.

> I tried to make the binding as flexible and generic as possible. But I do
> not currently see any immediate need for more than one set_sysclk() call per
> dai. I just did not see any reason to not allow it either.

This explains why you want to do this but what about the clock API
portion of the question - it would be good to move the ASoC clocking
more into the clock API, this would help integration with wider clock
trees.
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