image_types_fsl.bbclass: add support to use Device Tree for Linux kernel

To support new kernel, which use Device Tree for description of
hardware and machine, the image generation needs to be reworked.
U-Boot supports it out of box, so it just need to be available for
reading while the imx-bootlets we need to append the dtb file on the
very end of the zImage file.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

1 files changed, 37 insertions, 2 deletions

diff --git a/classes/image_types_fsl.bbclass b/classes/image_types_fsl.bbclass
index e9e3279..324d446 100644
--- a/classes/image_types_fsl.bbclass
+++ b/classes/image_types_fsl.bbclass
@@ -13,8 +13,29 @@ UBOOT_SUFFIX_SDCARD ?= "${UBOOT_SUFFIX}"
 
 # IMX Bootlets Linux bootstream
 IMAGE_DEPENDS_linux.sb = "elftosb-native imx-bootlets virtual/kernel"
-IMAGE_CMD_linux.sb = "(cd ${DEPLOY_DIR_IMAGE} ; elftosb -z -c imx-bootlets-linux.bd-${MACHINE} \
-                                                        -o ${IMAGE_NAME}.linux.sb)"
+IMAGE_LINK_NAME_linux.sb = ""
+IMAGE_CMD_linux.sb () {
+        kernel_bin="`readlink ${KERNEL_IMAGETYPE}-${MACHINE}.bin`"
+        kernel_dtb="`readlink ${KERNEL_IMAGETYPE}-${MACHINE}.dtb`"
+        linux_bd_file=imx-bootlets-linux.bd-${MACHINE}
+        if [ `basename $kernel_bin .bin` = `basename $kernel_dtb .dtb` ]; then
+                # When using device tree we build a zImage with the dtb
+                # appended on the end of the image
+                linux_bd_file=imx-bootlets-linux.bd-dtb-${MACHINE}
+                cat $kernel_bin $kernel_dtb \
+                    > $kernel_bin-dtb
+                rm -f ${KERNEL_IMAGETYPE}-${MACHINE}.bin-dtb
+                ln -s $kernel_bin-dtb ${KERNEL_IMAGETYPE}-${MACHINE}.bin-dtb
+        fi
+
+        # Ensure the file is generated
+        rm -f ${IMAGE_NAME}.linux.sb
+        elftosb -z -c $linux_bd_file -o ${IMAGE_NAME}.linux.sb
+
+        # Remove the appended file as it is only used here
+        rm -f $kernel_bin-dtb
+}
+
 
 # U-Boot mxsboot generation to SD-Card
 UBOOT_SUFFIX_SDCARD_mxs ?= "mxsboot-sdcard"
@@ -84,6 +105,13 @@ generate_imx_sdcard () {
                           | awk '/ 2 / { print substr($4, 1, length($4 -1)) / 1024 }')
         mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
         mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/uImage-${MACHINE}.bin ::/uImage
+        if [ -e "${KERNEL_IMAGETYPE}-${MACHINE}.dtb" ]; then
+                kernel_bin="`readlink ${KERNEL_IMAGETYPE}-${MACHINE}.bin`"
+                kernel_dtb="`readlink ${KERNEL_IMAGETYPE}-${MACHINE}.dtb`"
+                if [ `basename $kernel_bin .bin` = `basename $kernel_dtb .dtb` ]; then
+                        mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.dtb ::/machine.dtb
+                fi
+        fi
 
         dd if=${WORKDIR}/boot.img of=${SDCARD} conv=notrunc seek=1 bs=1M
         dd if=${SDCARD_ROOTFS} of=${SDCARD} conv=notrunc seek=1 bs=${BOOT_SPACE}
@@ -134,6 +162,13 @@ generate_mxs_sdcard () {
 
                 mkfs.vfat -n "${BOOTDD_VOLUME_ID}" -S 512 -C ${WORKDIR}/boot.img $BOOT_BLOCKS
                 mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/uImage-${MACHINE}.bin ::/uImage
+                if [ -e "${KERNEL_IMAGETYPE}-${MACHINE}.dtb" ]; then
+                        kernel_bin="`readlink ${KERNEL_IMAGETYPE}-${MACHINE}.bin`"
+                        kernel_dtb="`readlink ${KERNEL_IMAGETYPE}-${MACHINE}.dtb`"
+                        if [ `basename $kernel_bin .bin` = `basename $kernel_dtb .dtb` ]; then
+                                mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.dtb ::/machine.dtb
+                        fi
+                fi
 
                 dd if=${WORKDIR}/boot.img of=${SDCARD} conv=notrunc seek=2 bs=1MiB
                 ;;