About Beaglebone Black device tree

[Chris Johns]

On 9/2/20 9:33 pm, Christian Mauderer wrote:
> On 07/02/2020 18:23, Vijay Kumar Banerjee wrote:
> On Mon, Feb 3, 2020 at 7:21 PM Christian Mauderer
>> <christian.mauderer at embedded-brains.de
>> <mailto:christian.mauderer at embedded-brains.de>> wrote:
>>     On 02/02/2020 18:34, Vijay Kumar Banerjee wrote:
>>     > On Sun, Feb 2, 2020 at 9:49 PM Christian Mauderer
>>     <list at c-mauderer.de <mailto:list at c-mauderer.de>
>>     > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>> wrote:
>>     >     On 31/01/2020 17:43, Vijay Kumar Banerjee wrote:
>>     >     > On Fri, Jan 31, 2020 at 9:59 PM Christian Mauderer
>>     >     <list at c-mauderer.de <mailto:list at c-mauderer.de>
>>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>
>>     >     > <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>
>>     <mailto:list at c-mauderer.de <mailto:list at c-mauderer.de>>>> wrote:
>>     >     >     On 31/01/2020 17:25, Christian Mauderer wrote:
>>     >     >     > On 31/01/2020 16:04, Vijay Kumar Banerjee wrote:
>>     >     >
>>     >     > How about rtemsbsd/sys/dts/arm/overlays ?
>>     >     > Following the freebsd tree freebsd/sys/dts/arm/overlays/
>>     >
>>     >     Following the FreeBSD tree is a good point. But would they be
>>     visible
>>     >     there? Beneath that: We currently don't have support for
>>     building the
>>     >     overlays. Do you have an idea how that could look like?
>>     >
>>     > keeping it visible will be a problem. For building the overlay, we can
>>     > use dtc
>>     > and add a script to build the overlay. I see that rsb has a build
>>     > package for
>>     > devel/dtc.bset as well.
>>
>>     Hm. Optimal would be an integration into waf. Something like "waf
>>     fdt-overlay". Even better would be if we could build the original fdt
>>     too. But I'm sure that both would be quite a bit tricky to integrate
>>     (the waf scripts in libbsd are not really easy to understand). So I'm
>>     not insisting on that.
>>
>> Sounds like it can become a good small project. Do we want a ticket
>> for this? 
> 
> I think it's a bit too small for a GSoC project but it could be a
> starting point for someone who wants to get knowledge about the libbsd
> build system. So: Yes, a ticket sounds good.

The rtems-boot-image handles loading FDT files onto an SD card and I plan to add
overlay support when I find time to get back to this tool.

I am not sure if this is the right place to add what you are discussing. I raise
this because getting these files on to an SD card and having u-boot load them is
another issue so may be this tool can help solve this problem as well.

Chris