Re: [RFC PATCH 2/2] ASoC: select sysclk clock from mlck clock provider in wm8994 driver
From: Mark Brown
Date: Wed Dec 20 2017 - 10:50:52 EST
On Wed, Dec 20, 2017 at 12:42:10PM +0000, Olivier MOYSAN wrote:
> As a generic machine, simple or audio graph cards are not able to manage
> codec clock muxing.
> If we exclude the management of muxing through codec controls,
> the remaining solution is to handle it fully through clock framework.
> The current patch only supports a limited range of muxing capabilities
> of the codec.
> To have a full management of the muxing, I think it is necessary to add
> a device tree node for each codec interface and to define an aif clock
> in these nodes.
> Then parent clock assignment of these aif clocks would allow to handle
> the muxing.
Controlling clocking through a clock API binding would be good, yes.
That'd solve a bunch of other problems with use of multi-purpose clocks
for audio as well.
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