[alsa-devel] [PATCH] Add support for CLKOUT to wm8731 codec driver

Mark Brown broonie at opensource.wolfsonmicro.com
Fri Oct 30 18:00:03 CET 2009

On Fri, Oct 30, 2009 at 11:50:20AM -0500, Bill Gatliff wrote:
> Mark Brown wrote:

> > It'd be better define a new clock for the CLKOUT pin rather than munging
> > it in with the master clock.  MCLK is always an input on the WM8731, the
> > CLKOUT output is a separate pin and so including it in MCLK is likely to
> > make things confusing and could well introduce errors.

> Could you explain more about what you meant by this?  I'm trying to
> rework these patches now, and I don't understand how to implement what
> you are suggesting.

Define two clock IDs and then use a switch statement in the function to
determine which to act on, allowing the master clock to be controlled
separately to the output clock.

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