[yocto] [meta-raspberrypi][PATCH v6 0/4] Support for .dtbo files for dtb overlays, required by kernels 4.4.6+

[Khem Raj]

> On Jul 20, 2016, at 3:00 PM, Herve Jourdain <herve.jourdain at neuf.fr> wrote:
> 
> v6: rebased
> 
> v5: modifications after more review
> * Added an Upstream-Status to the kernel patch
> * Only one instance of KERNEL_DEVICETREE defined (with the new .dtbo syntax)
> * Modification of the KERNEL_DEVICETREE is done in linux-raspberry-base.bbclass, based on the kernel version
> 
> v4: rebased
> For kernels 4.4.9+, the behavior for the device tree overlays loading has been modified on RaspberryPi.
> For overlays, it loads .dtbo files, not .dtb anymore.
> Also, it does not check for -overlay extension, so the name of the overlay that is placed in the "overlays" directory must be <overlay_name>.dtbo, instead of <overlay_name>-overlay.dtb.
> 
> This patch addresses the issue for kernels 4.4+, while keeping the same behavior for older kernels.
> This patch must be used in conjunction with another patch to meta/recipes-kernel/linux-dtb.inc, which will allow the processing of .dtbo files for overlays, instead of only .dtb like before.
> 
> .dtb are still in use, but only for the "real" device trees (not the overlays).

I have staged this series in

https://github.com/kraj/meta-raspberrypi kraj/master

However, this all has to wait on two things.

The OE-core patch

https://patchwork.openembedded.org/patch/123747/

and we need to branch out for krogoth

> 
> Herve Jourdain (4):
>  linux-raspberrypi_4.4.bb: support for .dtbo files for dtb overlays
>  rpi-base.inc: support for .dtbo files for dtb overlays
>  linux-raspberrypi-base.bbclass: support for .dtbo files for dtb
>    overlays
>  sdcard_image-rpi.bbclass: support for .dtbo files for dtb overlays
> 
> classes/linux-raspberrypi-base.bbclass             | 19 ++++++----
> classes/sdcard_image-rpi.bbclass                   | 15 +++++---
> conf/machine/include/rpi-base.inc                  | 30 +++++++--------
> .../0001-fix-dtbo-rules.patch                      | 44 ++++++++++++++++++++++
> recipes-kernel/linux/linux-raspberrypi_4.4.bb      |  1 +
> 5 files changed, 81 insertions(+), 28 deletions(-)
> create mode 100644 recipes-kernel/linux/linux-raspberrypi-4.4/0001-fix-dtbo-rules.patch
> 
> --
> 2.7.4
> 
> --
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