Re: wfx200 weird out-of-range power supply issue

["Jérôme Pouiller" <jerome.pouiller@silabs.com>]

On Thursday 5 June 2025 15:40:34 CEST Petko Manolov wrote:
>         Hey guys,
>
> Apologies if this has been asked before, but i've searched and didn't find
> anything related to this problem.  So here it goes: i'm upgrading the kernel of
> a custom stm32mp15 board (from v5.4 to v6.6) and i've stumbled upon this when
> wfx driver module get loaded:
> 
> wfx-spi spi0.0: sending configuration file wfx/wf200.pds
> wfx-spi spi0.0: asynchronous error: out-of-range power supply voltage: -20
> ... a bunch of "hif: 00000000: bc 04 e4 15 04 00 00 00 ec 00 74 76 f7 b7 cd 09" like messages ...
> wfx-spi spi0.0: time out while polling control register
> wfx-spi spi0.0: chip is abnormally long to answer
> wfx-spi spi0.0: chip did not answer
> wfx-spi spi0.0: hardware request CONFIGURATION (0x09) on vif 2 returned error -110
> wfx-spi spi0.0: PDS:4: chip didn't reply (corrupted file?)
> wfx-spi: probe of spi0.0 failed with error -110
> 
> Needless to say that v5.4 kernel setup works fine.  The only difference with
> v6.6 is the wfx driver and kernel's DTB.  Now, i've verified that wf200 is
> powered with 3.3V, in both cases, so that's not it.  I've also lowered the SPI
> clock from 40000000 to 20000000 but it didn't make a difference.
> 
> By looking at the driver i'm fairly certain the above error is actually coming
> from the wf200 firmware and the driver is just printing an error message so i
> don't see reasonable ways of debugging this thing.  In short, any suggestion
> would be greatly appreciated.

I believe you should have a trace with the firmware version (starting with
"started firmware x.x.x"). Could you provide the firmware versions?

The issue appears when the driver load the wf200.pds. Can you provide
the wf200.pds you used with 5.4 and with 6.6? Normally, you can't use
the same file since the format has changed in v5.17.

-- 
Jérôme Pouiller