Add initramfs support

Permit to build an image with initramfs.
Add information in README to build with initramfs.

Change-Id: Icb812151a22771717805ec0a82feb7993f462b47
Signed-off-by: Sébastien Mennetrier <s.mennetrier@innotis.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/classes/sdcard_image-rpi.bbclass b/classes/sdcard_image-rpi.bbclass
index 179b7b7..eb337dc 100644
--- a/classes/sdcard_image-rpi.bbclass
+++ b/classes/sdcard_image-rpi.bbclass
@@ -26,6 +26,9 @@ inherit image_types
 # Set kernel and boot loader
 IMAGE_BOOTLOADER ?= "bcm2835-bootfiles"
 
+# Set initramfs extension
+KERNEL_INITRAMFS ?= ""
+
 # Boot partition volume id
 BOOTDD_VOLUME_ID ?= "${MACHINE}"
 
@@ -95,10 +98,10 @@ IMAGE_CMD_rpi-sdimg () {
         case "${KERNEL_IMAGETYPE}" in
         "uImage")
             mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/u-boot.img ::kernel.img
-            mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.bin ::uImage
+            mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin ::uImage
             ;;
         *)
-            mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}-${MACHINE}.bin ::kernel.img
+            mcopy -i ${WORKDIR}/boot.img -s ${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin ::kernel.img
             ;;
         esac