[yocto] [meta-raspberrypi][PATCH v3 0/5] Support for .dtbo files for dtb overlays, required by kernels 4.4.6+

[Herve Jourdain]

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).

Herve Jourdain (5):
  Support for .dtbo files for dtb overlays, required by kernels 4.4.6+
  Support for .dtbo files for dtb overlays, required by kernels 4.4.6+
  Support for .dtbo files for dtb overlays, required by kernels 4.4.6+
  Support for .dtbo files for dtb overlays, required by kernels 4.4.6+
  Support for .dtbo files for dtb overlays, required by kernels 4.4.6+

 classes/linux-raspberrypi-base.bbclass             |  4 ++-
 classes/sdcard_image-rpi.bbclass                   |  7 ++--
 conf/machine/include/rpi-base.inc                  | 37 +++++++++++++++++++++-
 .../0001-fix-dtbo-rules.patch                      | 27 ++++++++++++++++
 recipes-kernel/linux/linux-raspberrypi_4.4.bb      |  1 +
 5 files changed, 71 insertions(+), 5 deletions(-)
 create mode 100644 recipes-kernel/linux/linux-raspberrypi-4.4/0001-fix-dtbo-rules.patch

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2.7.4