[meta-xilinx] Loading FPGA bit streams

[Philip Balister]

On 06/09/2015 09:41 AM, Mike Looijmans wrote:
> On 09-06-15 15:28, Nathan Rossi wrote:
>> On Mon, Jun 8, 2015 at 6:56 PM, SMITH Peter T
>> <peter.t.smith at alstom.com> wrote:
>>> Stephen,
>>>
>>> I thought that the xdevcfg driver was not part of the meta-xilinx Yocto
>>> build and that the community was working towards a generic
>>> fpga_manager (or
>>> something like that) solution.
>>
>> The 'xdevcfg' driver is only found in the linux-xlnx kernel. Currently
>> in meta-xilinx the linux-xlnx kernel is used by default for the Zynq
>> machines, this default is infact due in part to the fpga_manger and or
>> any driver not being available in mainline/yocto kernels yet.
>>
>> Also to add to Mike's comment about delayed loading/probing, device
>> tree overlays might be useful as well (especially for
>> re-configuration).
> 
> At the risk of hijacking this topic, I looked at overlays, since they're
> available on the current 3.19 kernel, but apparently it's an in-kernel
> thing and there appears to be no way to "inject" a device-tree overlay
> fragment from userspace. (The only way to actually use DT overlays
> appears to be buying a beagle-board...)
> 
> Since you appear to be one of the few people who actually know what
> device-tree overlays are (I found out about them at the ELCE last year),
> do you happen to have any hands-on experience?
> 
> It'd be great to be able to pair a bitstream and a DT overlay...
> 

Here is the latest:

https://www.youtube.com/watch?v=3Ag7ZBC_Nts

Philip

> 
> Kind regards,
> 
> Mike Looijmans
> System Expert
> 
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