Re: Duplicated device tree and Dynamic symbols

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Hi Ricardo,

> On Jun 8, 2015, at 23:14 , Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx> wrote:
> 
> Hello Pantelis
> 
> Any progress here?
> 

I just posted a bunch of patches that make possible using PCI with device tree.
Perhaps you’d like to take a look.

> Thanks
> 

Regards

— Pantelis

> On Tue, Apr 28, 2015 at 10:36 AM, Pantelis Antoniou
> <pantelis.antoniou@xxxxxxxxxxxx> wrote:
>> Hi Ricardo,
>> 
>>> On Apr 28, 2015, at 11:16 , Ricardo Ribalda Delgado <ricardo.ribalda@xxxxxxxxx> wrote:
>>> 
>>> Hello
>>> 
>>> I have an X86 platform with device tree support. It has multiple pci
>>> slots with a custom board that is described with a device tree.
>>> 
>>> When the pci device is probed, the driver fetches a device tree from
>>> the firmware infrastructure, patches the range property based on the
>>> bar address and adds the device to the main device tree.
>>> 
>>> This works perfectly fine with only one card, but when the second card
>>> is connected: Here be dragons :)
>>> 
>>> The main issue is that of_find_node_by_phandle always resolves to the
>>> first connected card. I fixed this by creating a new function.
>>> of_find_node_by_phandle_family() that chooses the closest phandle on
>>> the tree, not just the first one.
>>> 
>>> By reading the "Dynamic Symbols support and fixup support"
>>> here:
>>> http://events.linuxfoundation.org/sites/events/files/slides/dynamic-dt-elce14.pdf
>>> and here
>>> https://lwn.net/Articles/616859/
>>> 
>>> It seemed that the patch would fix my issue and it would be already
>>> merged, but I cannot find the patch here
>>> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git
>>> or here
>>> https://git.kernel.org/cgit/linux/kernel/git/jdl/dtc.git
>>> 
>>> So I am wondering some stuff:
>>> 
>>> Would a patch adding my of_find_node_by_phandle_family() would be accepted.?
>>> 
>>> Will Dynamic symbols fix my issue?
>>> 
>>> What is the status of Dynamic symbol support?
>>> 
>>> Thanks!
>>> 
>>> 
>> 
>> You’ll find it hard to believe but there’s someone using something similar.
>> 
>> I’m trying to figure out how to make it work; hang on to your horses. I’ll CC you
>> when I post the patches.
>> 
>> 
>>> --
>>> Ricardo Ribalda
>> 
>> Regards
>> 
>> — Pantelis
>> 
> 
> 
> 
> -- 
> Ricardo Ribalda

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