On Fri, Mar 12, 2021 at 01:01:41PM +0100, Michael Walle wrote:

Am 2021-03-12 12:35, schrieb Mark Brown:

quoted

If the card has a clock API clock as sysclk then set_sysclk(() should
be configuring that clock.

What do you mean by "the card". The simple-audio-card itself?

Take a look at:
https://elixir.bootlin.com/linux/v5.12-rc2/source/arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var3-ads2.dts#L29

Does the card has a clock? IMHO the WM8904 codec has a clock, but not
the audio card.

The clock on the CODEC, which the card configures.  The CODEC should be
passing on the configuration to the clock API.