[alsa-devel] [PATCH] [v2] ASoC: support all possible sample rates in the WM8776 driver

Mark Brown broonie at opensource.wolfsonmicro.com
Fri Sep 16 18:47:54 CEST 2011

On Fri, Sep 16, 2011 at 11:33:38AM -0500, Timur Tabi wrote:
> Mark Brown wrote:
> > Machine drivers are currently best placed to set constraints if the
> > clocking is limited.

> But how is the machine driver supposed to know what those sample rates
> are?  It would need to know how which dividers that codec uses.  That
> would mean that the machine driver has to be hard-codec with
> information on the internals of the codec.

You'd have to look at the CODEC datasheet and figure out what it's
capable of given the clocks you're able to give it.  Depending on the
flexibility you've got and power you're willing to spend there may be no
need to do anything as you may be able to generate any clocks the device
may need (for example with devices that have FLLs).

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