linux-dtb: add multi-dtb build support

[<b19537@freescale.com>]

From: Zhenhua Luo <b19537@freescale.com>

    including following enhancement:
    * support multi-dtb build
    * skip dtb build and install when KERNEL_DEVICETREE is empty
    * print a warning message when specified dts file is not available

Signed-off-by: Zhenhua Luo <b19537@freescale.com>
---
 meta/recipes-kernel/linux/linux-dtb.inc |   36 +++++++++++++++++++++++++------
 1 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/meta/recipes-kernel/linux/linux-dtb.inc b/meta/recipes-kernel/linux/linux-dtb.inc
index 9188cee..8aa1458 100644
--- a/meta/recipes-kernel/linux/linux-dtb.inc
+++ b/meta/recipes-kernel/linux/linux-dtb.inc
@@ -15,13 +15,35 @@ python __anonymous () {
 
 do_install_append() {
     if test -n "${KERNEL_DEVICETREE}"; then
-	dtc -I dts -O dtb ${KERNEL_DEVICETREE_FLAGS} -o devicetree ${KERNEL_DEVICETREE}
-	install -m 0644 devicetree ${D}/boot/devicetree-${KERNEL_VERSION}
-	install -d ${DEPLOYDIR}
-	install -m 0644 devicetree ${DEPLOYDIR}/${KERNEL_IMAGE_BASE_NAME}.dtb
-	cd ${DEPLOYDIR}
-	rm -f ${KERNEL_IMAGE_SYMLINK_NAME}.dtb
-	ln -sf ${KERNEL_IMAGE_BASE_NAME}.dtb ${KERNEL_IMAGE_SYMLINK_NAME}.dtb
+        for DTS_FILE in ${KERNEL_DEVICETREE}; do
+            if [ ! -f ${DTS_FILE} ]; then
+                echo "Warning: ${DTS_FILE} is not available!"
+                continue
+            fi
+            DTS_BASE_NAME=`basename ${DTS_FILE} | awk -F "." '{print $1}'`
+            DTB_NAME=`echo ${KERNEL_IMAGE_BASE_NAME} | sed "s/${MACHINE}/${DTS_BASE_NAME}/g"`
+            DTB_SYMLINK_NAME=`echo ${KERNEL_IMAGE_SYMLINK_NAME} | sed "s/${MACHINE}/${DTS_BASE_NAME}/g"`
+            dtc -I dts -O dtb ${KERNEL_DEVICETREE_FLAGS} -o ${DTS_BASE_NAME} ${DTS_FILE}
+            install -m 0644 ${DTS_BASE_NAME} ${D}/boot/devicetree-${DTB_SYMLINK_NAME}.dtb
+        done
     fi
 }
 
+do_deploy_append() {
+    if test -n "${KERNEL_DEVICETREE}"; then
+        for DTS_FILE in ${KERNEL_DEVICETREE}; do
+            if [ ! -f ${DTS_FILE} ]; then
+                echo "Warning: ${DTS_FILE} is not available!"
+                continue
+            fi
+            DTS_BASE_NAME=`basename ${DTS_FILE} | awk -F "." '{print $1}'`
+            DTB_NAME=`echo ${KERNEL_IMAGE_BASE_NAME} | sed "s/${MACHINE}/${DTS_BASE_NAME}/g"`
+            DTB_SYMLINK_NAME=`echo ${KERNEL_IMAGE_SYMLINK_NAME} | sed "s/${MACHINE}/${DTS_BASE_NAME}/g"`
+            install -d ${DEPLOYDIR}
+            install -m 0644 ${B}/${DTS_BASE_NAME} ${DEPLOYDIR}/${DTB_NAME}.dtb
+            cd ${DEPLOYDIR}
+            ln -sf ${DTB_NAME}.dtb ${DTB_SYMLINK_NAME}.dtb
+            cd -
+        done
+    fi
+}
-- 
1.7.0.4