[oe-commits] [openembedded-core] 35/50: kernel-devicetree.bbclass: Add support to generate append to kernel

[git at git.openembedded.org]

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rpurdie pushed a commit to branch master-next
in repository openembedded-core.

commit 9624ee9406e5598d4ffbe0b22fb233e9be8c7b0c
Author: Otavio Salvador <otavio at ossystems.com.br>
AuthorDate: Thu Sep 21 10:58:33 2017 -0300

    kernel-devicetree.bbclass: Add support to generate append to kernel
    
    The are use cases where the Device Tree appended to the kernel is
    convinient, so we generate the bundle concatenating the kernel (and
    potentionally the initramfs) and the Device Tree binaries.
    
    To enable it, set KERNEL_DEVICETREE_BUNDLE variable to '1'
    
    Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
    Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 meta/classes/kernel-devicetree.bbclass | 52 +++++++++++++++++++++++++++++++++-
 1 file changed, 51 insertions(+), 1 deletion(-)

diff --git a/meta/classes/kernel-devicetree.bbclass b/meta/classes/kernel-devicetree.bbclass
index 72814ca..6e08be4 100644
--- a/meta/classes/kernel-devicetree.bbclass
+++ b/meta/classes/kernel-devicetree.bbclass
@@ -1,6 +1,13 @@
 # Support for device tree generation
-PACKAGES_append = " kernel-devicetree"
+PACKAGES_append = " \
+    kernel-devicetree \
+    ${@['kernel-image-zimage-bundle', ''][d.getVar('KERNEL_DEVICETREE_BUNDLE') != '1']} \
+"
 FILES_kernel-devicetree = "/${KERNEL_IMAGEDEST}/*.dtb /${KERNEL_IMAGEDEST}/*.dtbo"
+FILES_kernel-image-zimage-bundle = "/${KERNEL_IMAGEDEST}/zImage-*.dtb.bin"
+
+# Generate kernel+devicetree bundle
+KERNEL_DEVICETREE_BUNDLE ?= "0"
 
 normalize_dtb () {
 	DTB="$1"
@@ -20,6 +27,28 @@ get_real_dtb_path_in_kernel () {
 	echo "${DTB_PATH}"
 }
 
+do_configure_append() {
+	if [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+		if echo ${KERNEL_IMAGETYPE_FOR_MAKE} | grep -q 'zImage'; then
+			case "${ARCH}" in
+				"arm")
+				config="${B}/.config"
+				if ! grep -q 'CONFIG_ARM_APPENDED_DTB=y' $config; then
+					bbwarn 'CONFIG_ARM_APPENDED_DTB is NOT enabled in the kernel. Enabling it to allow the kernel to boot with the Device Tree appended!'
+					sed -i "/CONFIG_ARM_APPENDED_DTB[ =]/d" $config
+					echo "CONFIG_ARM_APPENDED_DTB=y" >> $config
+					echo "# CONFIG_ARM_ATAG_DTB_COMPAT is not set" >> $config
+				fi
+				;;
+				*)
+				bberror "KERNEL_DEVICETREE_BUNDLE is not supported for ${ARCH}. Currently it is only supported for 'ARM'."
+			esac
+		else
+			bberror 'The KERNEL_DEVICETREE_BUNDLE requires the KERNEL_IMAGETYPE to contain zImage.'
+		fi
+	fi
+}
+
 do_compile_append() {
 	for DTB in ${KERNEL_DEVICETREE}; do
 		DTB=`normalize_dtb "${DTB}"`
@@ -38,6 +67,12 @@ do_install_append() {
 			symlink_name=${type}"-"${KERNEL_IMAGE_SYMLINK_NAME}
 			DTB_SYMLINK_NAME=`echo ${symlink_name} | sed "s/${MACHINE}/${DTB_BASE_NAME}/g"`
 			ln -sf ${DTB_BASE_NAME}.${DTB_EXT} ${D}/${KERNEL_IMAGEDEST}/devicetree-${DTB_SYMLINK_NAME}.${DTB_EXT}
+
+			if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+				cat ${D}/${KERNEL_IMAGEDEST}/$type \
+					${D}/${KERNEL_IMAGEDEST}/${DTB_BASE_NAME}.${DTB_EXT} \
+					> ${D}/${KERNEL_IMAGEDEST}/$type-${DTB_BASE_NAME}.${DTB_EXT}.bin
+			fi
 		done
 	done
 }
@@ -57,6 +92,21 @@ do_deploy_append() {
 			install -m 0644 ${DTB_PATH} ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT}
 			ln -sf ${DTB_NAME}.${DTB_EXT} ${DEPLOYDIR}/${DTB_SYMLINK_NAME}.${DTB_EXT}
 			ln -sf ${DTB_NAME}.${DTB_EXT} ${DEPLOYDIR}/${DTB_BASE_NAME}.${DTB_EXT}
+
+			if [ "$type" = "zImage" ] && [ "${KERNEL_DEVICETREE_BUNDLE}" = "1" ]; then
+				cat ${DEPLOYDIR}/$type \
+					${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT} \
+					> ${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT}.bin
+				ln -sf ${DTB_NAME}.${DTB_EXT}.bin ${DEPLOYDIR}/$type-${DTB_BASE_NAME}.${DTB_EXT}.bin
+
+				if [ -e "${KERNEL_OUTPUT_DIR}/${type}.initramfs" ]; then
+					cat ${KERNEL_OUTPUT_DIR}/${type}.initramfs \
+						${DEPLOYDIR}/${DTB_NAME}.${DTB_EXT} \
+						> ${DEPLOYDIR}/${type}-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin
+					ln -sf ${type}-${INITRAMFS_BASE_NAME}-${DTB_BASE_NAME}.${DTB_EXT}.bin \
+					       ${DEPLOYDIR}/${type}-initramfs-${DTB_BASE_NAME}.${DTB_EXT}-${MACHINE}.bin
+				fi
+			fi
 		done
 	done
 }

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