Re: HEADS UP: DTS updated [was Re: Call for testers: new DTS from Linux 6.12]

[Dave Tyson <dtyson%anduin.org.uk@localhost>]

On Fri, 2026-02-13 at 18:21 +0530, Abu Hurairah wrote:
> On Fri, Jan 23, 2026 at 06:45:39AM +0000, Nick Hudson wrote:
> > 
> > 
> > > On 23 Jan 2026, at 01:46, Abu Hurairah
> > > <cyclohexane%netcourrier.com@localhost> wrote:
> > > 
> > > On Mon, Jan 19, 2026 at 05:56:35AM +0000, Nick Hudson wrote:
> > > > -current has now been updated with Linux 6.12.66
> > > > 
> > > > New DTS and kernels are available in
> > > > 
> > > >    https://releng.netbsd.org/builds/HEAD/20260118125328Z/
> > > > 
> > > > or newer.
> > > > 
> > > > https://nycdn.netbsd.org/pub/arm/
> > > > 
> > > > has images for boards as well.
> > > > 
> > > > Thanks to everyone who tested the new DTS.
> > > > 
> > > > 
> > > The latest dtb is working with my rpi-zero-2w board.
> > > However, the broadcom dtbs need to be placed directly under the
> > > dtb folder.
> > > Else, the machine hangs at the rainbow screen.
> > > 
> > 
> the wifi works only for about 5 - 6 hours, after which the machine
> needs
> to be rebooted. Is this a problem with the firmware or the kernel ?
> 
>  
I found issues with thefirmware for the rpi zero-2-w a couple of years
back and messed around with the wifi firmware images for the rpi-3b. I
got it to work, but it was flaky.

Having switched to the arm64 version on NetBSD-current I had another
look in this area and found these images on one of the linux sites:

brcmfmac43436-sdio.raspberrypi,model-zero-2-w.bin (413934 bytes)
brcmfmac43436-sdio.raspberrypi,model-zero-2-w.clm_blob (11209 bytes)
brcmfmac43436-sdio.raspberrypi,model-zero-2-w.txt (1611 bytes)

The board firmware loader expects the filenames to be different so I 
hard linked the 3 files to:

brcmfmac43430b0-sdio.raspberrypi,model-zero-2-w.bin
brcmfmac43430b0-sdio.raspberrypi,model-zero-2-w.clm_blob
brcmfmac43430b0-sdio.raspberrypi,model-zero-2-w.txt

With that done the wifi comes up OK and seems stable under light loads:

[     1.964427] bwfm0: Found Firmware file: brcmfmac43430b0-
sdio.raspberrypi,model-zero-2-w.bin
[     1.994429] bwfm0: NVRAM file default:    brcmfmac43430b0-sdio.txt
[     1.994429] bwfm0: NVRAM file model-spec: brcmfmac43430b0-
sdio.raspberrypi,model-zero-2-w.txt
[     1.994429] bwfm0: Found NVRAM file: brcmfmac43430b0-
sdio.raspberrypi,model-zero-2-w.txt
[     1.994429] bwfm0: CLM file default:    brcmfmac43430b0-
sdio.clm_blob
[     1.994429] bwfm0: CLM file model-spec: brcmfmac43430b0-
sdio.raspberrypi,model-zero-2-w.clm_blob
[     1.994429] bwfm0: Found CLM file: brcmfmac43430b0-
sdio.raspberrypi,model-zero-2-w.clm_blob
[     3.254530] bwfm0: CHIPACTIVE
[     3.364541] bwfm0: address e4:5f:01:3b:02:44
[     3.384544] bwfm0: wl0: Oct  9 2020 14:44:32 version 9.88.4.65
(test) (f149b32@shgit)  (r679549) FWID 01-f40f3270


ftping large files (~20Mb) seems to provoke a few error messages, but
the transfer generally completes OK. 

I think the quality of the built-in wifi is suspect as I have seen
moans about it on linux sites, so it may be better to rely on a
external usb wifi device.

HTH,
Dave