> -----Original Message-----
> From: Stefan Seyfried <[email protected]>
> Sent: 15 December 2020 15:38
> To: Guillaume Gardet <[email protected]>; [email protected]
> Cc: nd <[email protected]>
> Subject: Re: Newbie questions getting a not yet supported board going 
> (bananapi
> m2 zero)
> 
> On 14.12.20 08:52, Guillaume Gardet wrote:
> > Hi,
> >
> >> -----Original Message-----
> >> From: Stefan Seyfried <[email protected]>
> 
> >> I linked hardware:boot:staging u-boot (where you already enabled
> >> bananapi-m2-zero) to home:seife:bananapi, additionally the
> >> openSUSE:Factory:ARM JeOS image and this image now boots from SD card
> >> \O/ :-)
> >
> > Great news! Could you push your changes to openSUSE:Factory:ARM/JeOS
> please?
> > But, why you did not name your JeOS image bananapim2zero?
> 
> I just followed the example of the Banana Pi M2 plus which is called
> 
> sinovoipbpim2plus (sinovoip is the manufacturer IIUC), and thus named it
> sinovoipbpim2zero :-)
> 
> So I went for being consistent with other banana pi's It would probably make
> sense to rename both to "bananapim2{zero,plus}"
> because I doubt too many people will search for sinovoip. OTOH as long as 
> links in
> the wiki are pointing to the right image, everything will be fine. I 
> personally don't
> care too much.

IIRC, the name was from the u-boot config, which may have been renamed 
afterwards.

> 
> >> I'm looking into the missing wifi and ethernet now.
> >
> > There is no Ethernet, according to
> > http://wiki.banana-pi.org/Banana_Pi_BPI-M2_ZERO
> > Are you sure you are running a Bananapi M2 zero?
> 
> Yes, there is. There's just no connector on the board. But 4 wires and a
> RJ45 socket will give you an ethernet port:
> 
> http://wiki.banana-pi.org/Banana_Pi_BPI-
> M2_ZERO#how_to_use_zero_10.2F100_Ethernet
> 
> This is a case of "I need to patch the dtb to get this going".
> Unfortunately, just using the dtb from armbian made the ethernet appear (I
> have not yet soldered the connector, so I cannot tell if it would have 
> worked),
> but killed WiFi :-) (armbian uses linux-sunxi kernel so probably has other 
> changes
> to the device tree that conflicts with the upstream kernel).
> 
> So I'm back to the original question: Can I easily specify which dtb file to 
> load in
> grub? So that I can try alternate ones without having to resort to "rip the 
> card out
> of the bananapi, stick it into a PC and fix it again" in case the modified 
> dtb fails to
> boot?

Yes, you can add the following line in grub (press 'e' key to enter edit mode:
           devicetree /boot/dtb/your.dtb

Cheers,
Guillaume

> 
> Best regards,
> 
>       Stefan
> --
> Stefan Seyfried
> 
> "For a successful technology, reality must take precedence over
>   public relations, for nature cannot be fooled." -- Richard Feynman
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