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

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

On Friday 6 June 2025 16:01:43 CEST Petko Manolov wrote:
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> 
> On 25-06-06 14:13:18, Jérôme Pouiller wrote:
> > 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?
> 
> Here's what i get with the new firmware:
> 
> wfx-spi spi0.0: started firmware 3.17.0 "WF200_ASIC_WFM_(Jenkins)_FW3.17.0" (API: 3.12, keyset: C0, caps: 0x00000000)
> wfx-spi spi0.0: sending configuration file wfx/wf200.pds
> wfx-spi spi0.0: asynchronous error: out-of-range power supply voltage: -20
> 
> This is with the old one:
> 
> wfx-spi spi0.0: started firmware 3.12.2 "WF200_ASIC_WFM_(Jenkins)_FW3.12.2" (API: 3.7, keyset: C0, caps: 0x00000000)
> wfx-spi spi0.0: sending configuration file wfx/wf200.pds
> wfx-spi spi0.0: asynchronous error: out-of-range power supply voltage: -21
> 
> Apart from the error number the rest is pretty much the same.  Both dumps from
> using wf200-v6.6.pds (attached) as the old .pds won't load on v6.6.
> 
> > 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.
> 
> Attached you'll find both, old and new, versions of the PDS.  This is what i
> used to generate the v6.6 version:
> 
> pds_compress -l BRD8023A_Rev_B01.pds.in wf200-v6.6.pds
> 
> The old one used '-p' instead of '-l', but this is due to the format change, as
> you mentioned above.

Things are going to start to become fun. Your wf200-v6.6.pds is exactly the
same (same md5sum) than the one I use for ages. So the issue is not on this
side.

For info, I have a setup with kernel 6.1 + firmware 3.16.0 + Raspberry Pi
here.

Do you think your power supply could be unstable with your new DT? 

The voltage values reported by the driver (-21 and -20) are obviously not
correct. Maybe it would make sense to get the real value measured by the
chip. Do you have access to official Silabs support to make that request?




-- 
Jérôme Pouiller