Re: Barebox for Zedboard

[Johannes Roith <johannes@gnu-linux.rocks>]

Hello Ahmad,

Am Fri, May 16, 2025 at 09:28:03PM +0200 schrieb Ahmad Fatoum:
> Hello Johannes,
> 
> On 16.05.25 21:03, Johannes Roith wrote:
> > The big advantage of using such an approach would be support for similar
> > devices (e.g. the UltraScale+ ZYNQMP devices) could be added easily by
> > porting the Linux drivers to barebox.
> 
> I can't comment on the Zynq, but for ZynqMP, there is already a FPGA manager
> driver in drivers/firmware/zynqmp-fpga.c. FPGA programming is also supported
> for Altera SoCFPGA and are exposed over the firmware API.

That's exactly what I was looking for. For the ZYNQ it is not
implemented yet, but I could use the ZYNQMP as a reference. I also saw
there is the firmwareload command available to load the bitstream from
commandline

> 
> Loading OF overlays can already load firmware that way.

Could you give me an example for an OF overlay to load a firmware? Do I
have to place the firmware at a specific path like with Linux FPGA
manager or can I specify the path in the overlay?

Thanks and best regards,
Johannes

> 
> Cheers,
> Ahmad
> 
> >> That said I wouldn't mind helping with getting the missing bits added
> >> by reviewing/testing patches. :)
> >>
> >> Regards,
> >> Lucas
> >>
> >> Hey Lucas, 
> >>
> >> "That said I wouldn't mind helping with getting the missing bits added
> >> by reviewing/testing patches. :)"
> >>
> >> Did you made any attempts to do this?
> >>
> >> As far as I can see there are basicly two ways.  
> >> The "Xilinx-Way" by packing everything in Boot.bin.
> >> https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841976/Prepare+boot+image
> >> and the "Linux-Way"
> >> https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841645/Solution+Zynq+PL+Programming+With+FPGA+Manager
> >> using the FPGA manager 
> >> https://elixir.bootlin.com/linux/latest/source/drivers/fpga/zynq-fpga.c
> >>
> >> Best regards
> >> Michael
> >>
> >>
> >>  
> >>
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> barebox mailing list
> >> barebox@lists.infradead.org
> >> http://lists.infradead.org/mailman/listinfo/barebox
> > 
> > Best regards,
> > Johannes
> > 
> > 
> 
> 
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