[alsa-devel] [RFC PATCH] ASoC: wm8904: add CCF support

Mark Brown broonie at kernel.org
Mon Mar 24 12:06:16 CET 2014

On Mon, Mar 24, 2014 at 10:15:51AM +0800, Bo Shen wrote:
> On 03/21/2014 07:55 PM, Mark Brown wrote:
> >On Fri, Mar 21, 2014 at 10:37:47AM +0000, Mark Rutland wrote:
> >>On Fri, Mar 21, 2014 at 02:51:02AM +0000, Bo Shen wrote:

> >>>+  - wlf,sysclk-from-mclk: set the sys clock is driven from mclk,

> >>Why can the kernel not decide this?

> >It can.

> I really don't know how it decided by kernel (hardcode in machine driver ?),
> can you point me directly? Thanks.

It can just look to see if there is a suitable system clock present,
this shouldn't be hard.  If there's a clock connected at a suitable
rate it should use that, otherwise if there's a clock at an unsuitable
rate it should either change the rate of the clock or use the FLL.
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