devicetree in arm

[Grant Likely]

On Thu, Apr 8, 2010 at 12:41 AM, Bryan Wu <bryan.wu at canonical.com> wrote:
> Grant Likely wrote:
>>
>> On Thu, Mar 18, 2010 at 2:24 PM, Bill Gatliff <bgat at billgatliff.com>
>> wrote:
>>
>>>
>>> Russell King - ARM Linux wrote:
>>>
>>>>
>>>> On Thu, Mar 18, 2010 at 07:14:05AM -0600, Grant Likely wrote:
>>>>
>>>>
>>>>>
>>>>> ARM device tree support is very much in flux, and that particular
>>>>> branch gets rebased a lot as device tree code from Sparc, Microblaze
>>>>> and Powerpc is merged into drivers/of.  I may have ended up pushing
>>>>> out to test-devicetree without the ARM patches applied.  I'll look at
>>>>> it today, make sure the ARM stuff is all there, and then push it out
>>>>> again.
>>>>>
>>>>> Note however that this is only very basic support.  It doesn't yet
>>>>> have the code needed to register devices and drivers from device tree
>>>>> data.  That will be coming real-soon-now.
>>>>>
>>>>>
>>>>
>>>> Is someone going to do a device tree example port to a 'real' platform
>>>> rather than simple the ARM evaluation boards?
>>>>
>>>> As I've said previously, I'm not going to accept device tree stuff until
>>>> I see a working implementation on a set of real platforms.
>>>>
>>>>
>>>
>>> I can give it a spin on a couple of the boards I have here.  I'm already
>>> using device trees on my PPC platforms.
>>>
>>
>> Hi Bill.  I've just pushed out my tree with a bit of the device tree
>> probing working on the versatile platform.  It works with the QEMU
>> branch that Jeremy Kerr is maintaining.  Here are the git trees, and
>> the web page that describes how to build it:
>>
>> git://git.secretlab.ca/git/linux-2.6 test-devicetree
>> git://git://kernel.ubuntu.com/jk/dt/qemu.git
>> https://wiki.ubuntu.com/KernelTeam/ARMDeviceTrees
>>
>> I've got stuff working on real hardware too, but it's not fully baked
>> yet.  Right now qemu is the least trouble.
>
> Grant and Jeremy,
>
> I'm very happy to try that on my real Freescale i.MX51 board. Any hints
> about that?

Look at Jeremy's tree.  He's got a bunch of i.MX51 patches based on
top of my tree.  Here's the git url:

git://kernel.ubuntu.com/jk/dt/linux-2.6.git

g.