Re: [alsa-devel] [RFC PATCH 2/2] ASoC: select sysclk clock from mlck clock provider in wm8994 driver

On Thu, Dec 14, 2017 at 05:53:58PM +0100, Olivier Moysan wrote:

When defined in device tree, MCLK1 and MCLK2 are used as sysclk for aif1 and aif2 interfaces respectively.

That's not a valid assumption as far as I remember? The AIFs can use either MCLK depending on the system configuration I think.

If clock rate is let 0, the frequency provided by wm8994_set_dai_sysclk() is used instead.

I'd expect this the other way around, if we didn't specify a frequency then read it from the input otherwise try to use clk_set_rate() to propagate things up.