Re: Barebox for Zedboard

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Hi,

Cc'ing Michael, who had implemented that feature.

On 18.05.25 19:06, Johannes Roith wrote:
> Am Fri, May 16, 2025 at 09:28:03PM +0200 schrieb Ahmad Fatoum:
>> Loading OF overlays can already load firmware that way.
> 
> Could you give me an example for an OF overlay to load a firmware?

Should look the same as in Linux (with overlay patches applied).

Michael, do you happen to have an example to share?

> 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?

Relative file paths are looked up according to $global.firmware.path,
which is initialized to /env/firmware by default.

You can add extra paths there and if you are using bootloader spec,
/lib/firmware on the partition containing the entries is temporarily
prepended to the search path.

The symbols in question are firmware_(set|get)_searchpath.

Cheers,
Ahmad

> 
> 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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> 


-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |