Am 2021-03-12 12:35, schrieb Mark Brown:
On Thu, Mar 11, 2021 at 11:11:15PM +0100, Michael Walle wrote:
Am 2021-03-11 17:15, schrieb Mark Brown:
The trick is figuring out if it's best to vary the input clock or to use the FLL to adapt a fixed input clock,
For simple-audio-card you can set the "clock" property if you want that clock to be changed/enabled/disabled. But that doesn't seem to be the way to go, at least it was NAKed by Rob for the audio-graph-card. I don't see a way to figure out if MCLK should be controlled by simple-*-card without adding further properties to the device tree.
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/freesc...
Does the card has a clock? IMHO the WM8904 codec has a clock, but not the audio card.
-michael