STM32MP157C SDMMC3 for BCM43438 WLAN

[Mokail]

Hi,

I want to use the mp157 sdmmc3 feature, but it seems he didn't turn it on, because my wifi device doesn't work, do I need to turn on the clock elsewhere?:loudly_crying_face: :loudly_crying_face: :loudly_crying_face:

[Calvin Ageneau]

Hello Mokail,

Thanks for posting your question in the community,

What type of board are you using ?

If custom, the clocking of the sdmmc3 is set on the TF-A device tree, I'll invite you to check if it's correctly clocked.

BR,

Calvin

[Mokail]

Okay.

Yes,​ I am using the custom board,but in the TF-A device tree ,the clk of sdmmc3 looks well?:grimacing_face:

[Calvin Ageneau]

It seems that your clock is correct,

I've seen that you've changed the power supply in the DTS when I it compare to the DK2 wifi configuration,

May I ask you to check the hardware to see if it's a power problem, not a clock one ?

BR,

Calvin

[Mokail]

Oops...

​

​I tested the wifi voltage, which is normal.

Does wifi need to be loaded into the system as a module, if I compile directly into the uImage file, is it also possible?

The other problem is that I renamed sdmmc3 in dtsi, but it doesn't seem to have any effect on rootfs at startup.:fearful_face: