[OE-core] [PATCH] linux-dtb: Add simple DTB symlinks for devicetree

[Chase Maupin]

* This is similar to the symlinks provided for the kernel image
  in the /boot directory of a file system.  The goal is to have
  simply named symlinks in /boot that mirror the device tree
  name in the kernel sources.  This is so that programs like
  U-Boot can easily find the default device tree binary in the
  /boot directory and use that when booting the kernel.
* Use update-alternatives to handle proper creation and removal
  of the symlinks.

Signed-off-by: Chase Maupin <Chase.Maupin at ti.com>
---
 meta/recipes-kernel/linux/linux-dtb.inc |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/meta/recipes-kernel/linux/linux-dtb.inc b/meta/recipes-kernel/linux/linux-dtb.inc
index ec6c375..66cf255 100644
--- a/meta/recipes-kernel/linux/linux-dtb.inc
+++ b/meta/recipes-kernel/linux/linux-dtb.inc
@@ -45,3 +45,23 @@ do_deploy_append() {
         done
     fi
 }
+
+pkg_postinst_kernel-devicetree () {
+    cd /${KERNEL_IMAGEDEST}
+    for DTS_FILE in ${KERNEL_DEVICETREE}
+    do
+        DTS_BASE_NAME=`basename ${DTS_FILE} | awk -F "." '{print $1}'`
+        DTB_NAME="devicetree-uImage-${DTS_BASE_NAME}.dtb"
+        update-alternatives --install /${KERNEL_IMAGEDEST}/${DTS_BASE_NAME}.dtb ${DTS_BASE_NAME}.dtb ${DTB_NAME} ${KERNEL_PRIORITY} || true
+    done
+}
+
+pkg_postrm_kernel-devicetree () {
+    cd /${KERNEL_IMAGEDEST}
+    for DTS_FILE in ${KERNEL_DEVICETREE}
+    do
+        DTS_BASE_NAME=`basename ${DTS_FILE} | awk -F "." '{print $1}'`
+        DTB_NAME="devicetree-uImage-${DTS_BASE_NAME}.dtb"
+        update-alternatives --remove ${DTS_BASE_NAME}.dtb ${DTB_NAME} ${KERNEL_PRIORITY} || true
+    done
+}
-- 
1.7.0.4