[Buildroot] [PATCH v2 4/4] dtc: add patches for raspberry pi overlay support

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Dear Peter Seiderer,

On Sun, 11 Jan 2015 19:16:06 +0100, Peter Seiderer wrote:
> See [1] for documentation of raspberry pi kernel dt overlay support.
> 
> The following patches (see original download urls) where adjusted to dtc-1.4.1:
> 
> - 0003-dtc-Dynamic-symbols-fixup-support.patch
> https://github.com/RobertCNelson/dtc/commit/dd6a0533e846e8d5e690a618fa35cc15a6103efb.patch
> 
> - 0004-dtc-v-takes-no-argument-drop-extra.patch
> https://github.com/RobertCNelson/dtc/commit/f345d9e48c9e1169edf047de742da142cc5687bc.patch
> 
> [1] https://github.com/raspberrypi/documentation/blob/master/configuration/device-tree.md
> 
> Signed-off-by: Peter Seiderer <ps.report@gmx.net>
> ---
>  .../0003-dtc-Dynamic-symbols-fixup-support.patch   | 581 +++++++++++++++++++++
>  .../0004-dtc-v-takes-no-argument-drop-extra.patch  |  44 ++
>  2 files changed, 625 insertions(+)
>  create mode 100644 package/dtc/0003-dtc-Dynamic-symbols-fixup-support.patch
>  create mode 100644 package/dtc/0004-dtc-v-takes-no-argument-drop-extra.patch

We normally don't really like to include patches adding new features:
those should be included upstream first. However, for the case of the
DT overlay mechanism, it's now being more and more widely used for the
BeagleBone Black and the Raspberry Pi, so maybe we should make an
exception for this.

Opinion of other Buildroot developers on this is welcome.

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com