[yocto] [meta-raspberrypi][PATCH v3 2/5] Support for .dtbo files for dtb overlays, required by kernels 4.4.6+

[Herve Jourdain]

Kernel 4.4.6+ on RaspberryPi support .dtbo files for overlays, instead of .dtb.
Add support for both extensions for overlays (".dtb" and ".dtbo")

Signed-off-by: Herve Jourdain <herve.jourdain at neuf.fr>
---
 classes/sdcard_image-rpi.bbclass | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/classes/sdcard_image-rpi.bbclass b/classes/sdcard_image-rpi.bbclass
index 4dfd7a3..b3a8bc0 100644
--- a/classes/sdcard_image-rpi.bbclass
+++ b/classes/sdcard_image-rpi.bbclass
@@ -110,7 +110,7 @@ IMAGE_CMD_rpi-sdimg () {
 		;;
 	*)
 		if test -n "${DTS}"; then
-			# Device Tree Overlays are assumed to be suffixed by '-overlay.dtb' string and will be put in a dedicated folder
+			# Device Tree Overlays are assumed to be suffixed by '-overlay.dtb' (4.1.x) or by '.dtbo' (4.4.9+) string and will be put in a dedicated folder
 			DT_OVERLAYS="${@split_overlays(d, 0)}"
 			DT_ROOT="${@split_overlays(d, 1)}"
 
@@ -124,9 +124,10 @@ IMAGE_CMD_rpi-sdimg () {
 			# Copy device tree overlays to dedicated folder
 			mmd -i ${WORKDIR}/boot.img overlays
 			for DTB in ${DT_OVERLAYS}; do
-				DTB_BASE_NAME=`basename ${DTB} .dtb`
+				DTB_EXT=${DTB##*.}
+				DTB_BASE_NAME=`basename ${DTB} ."${DTB_EXT}"`
 
-				mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${DTB_BASE_NAME}.dtb ::overlays/${DTB_BASE_NAME}.dtb
+				mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${DTB_BASE_NAME}.${DTB_EXT} ::overlays/${DTB_BASE_NAME}.${DTB_EXT}
 			done
 		fi
 		mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin ::${SDIMG_KERNELIMAGE}
-- 
2.7.4