[meta-xilinx] [PATCH V2 2/5] device-tree: Add the QEMU hardware device tree

[Alistair Francis]

On Sun, Jul 31, 2016 at 7:55 AM, Nathan Rossi <nathan at nathanrossi.com> wrote:
> On Thu, Jul 28, 2016 at 7:26 AM, Alistair Francis
> <alistair.francis at xilinx.com> wrote:
>> This device tree is required by QEMU to describe the ZCU102 board.
>>
>> Signed-off-by: Alistair Francis <alistair.francis at xilinx.com>
>> ---
>>  .../device-tree/files/qemu/qemuzcu102-arm.dts      | 2410 ++++++++++++++++++++
>>  1 file changed, 2410 insertions(+)
>>  create mode 100644 recipes-bsp/device-tree/files/qemu/qemuzcu102-arm.dts
>>
>> diff --git a/recipes-bsp/device-tree/files/qemu/qemuzcu102-arm.dts b/recipes-bsp/device-tree/files/qemu/qemuzcu102-arm.dts
>> new file mode 100644
>> index 0000000..a7f2fbb
>> --- /dev/null
>> +++ b/recipes-bsp/device-tree/files/qemu/qemuzcu102-arm.dts
>
> Such a large device tree like this is going to be hard to maintain. Is
> there overlap between this qemu specific DT and the kernel includes?
> if possible it would be very useful to be including what you can from
> the zynqmp.dtsi.
>
> Also generally I like to avoid the dtc decompiled devicetrees as they
> are hard to read (e.g. phandles are int's, ints are formatted to hex,
> etc.). Please try to provide the device tree source(s) if possible.

Agreed! I hate this as much as you.

Unfortunately these QEMU device trees are auto-generated from an
internal repo. I am working on opening up the repo, hopefully it will
be done by the end of the year. It is a slow process internally.

Can we keep it like this for now and update it to pull a repo and
build them in the future when that's possible?

Thanks,

Alistair

>
> Alternatively you can also provide this as a blob from the QEMU
> sources if that works better? It would allow the tying of QEMU support
> to the device tree (aka not having to modify meta-xilinx every time
> you modify QEMU bindings). Something similar is used for the
> qemumicroblaze machines.
>
> Regards,
> Nathan
>
> -- trimmed content --
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