[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Bug#667681: flash-kernel: Please add support for Dreamplug / Marvell Kirkwood FDT

lcOn Thu, 2012-04-05 at 15:33 -0700, Martin Michlmayr wrote:
> Thanks for all your excellent explanations!
> * Ian Campbell <ijc@hellion.org.uk> [2012-04-05 23:06]:
> > I guess upstream is forcing all new board ports to use DT, which will
> > certainly be a pain for boards with a non DT bootloader.
> Yes, that's exactly the kind of devices I have in mind.
> > > Also, does it really say "Machine: Marvell Kirkwood (Flattened Device Tree)"?
> > 
> > Yes, it really does say that. I thought it was weird too but grepping
> > around in arch/arm it seems to be a fairly common structure (although
> > things aren't all that consistent)
> Ok... but so how do you know which board you're running on?

Good question. Some DT stuff gets exported in /proc/device-tree.

$ echo $(cat /proc/device-tree/model)
Globalscale Technologies Dreamplug

(and it turns out this is what the upstream devs said, I'll CC you into
that thread too)

> What I'm wondering is about the following scenario:
> We support multiple devices.  Let's say we support the following two:
>  - Dreamplug: which has u-boot support for DT.
>  - Some random NAS device which has a u-boot that is not DT capable,
>    so you have to add the DT blob to the kernel.
> Obbiously, flash-kernel has to do two different things:
>  - For the Dreamplug we just need to convert the kernel/ramdisk to a
>    uImage/uInitrd for u-boot.
>  - For the random NAS, we also have to copy the DT blob to the kernel
>    image.
> I'm not sure how his can be done if the Machine: string for both
> devices says "Marvell Kirkwood (Flattened Device Tree)".

Ian Campbell

If you're not careful, you're going to catch something.

Attachment: signature.asc
Description: This is a digitally signed message part

Reply to: