After '6392a63 rpi-base.inc: Use KERNEL_DEVICETREE by default' was
introduced, kernel versions < 3.18 might not be buildable. Since full
device tree support was introduced in 3.18 this change ensures that all
kernel < 3.18 will automatically disable device tree.
Signed-off-by: Petter Mabäcker <pet...@technux.se>
---
classes/linux-raspberrypi-base.bbclass | 29 +++++++++++++++++++++++++++++
classes/sdcard_image-rpi.bbclass | 6 ++++--
recipes-kernel/linux/linux-raspberrypi.inc | 4 +++-
3 files changed, 36 insertions(+), 3 deletions(-)
create mode 100644 classes/linux-raspberrypi-base.bbclass
diff --git a/classes/linux-raspberrypi-base.bbclass
b/classes/linux-raspberrypi-base.bbclass
new file mode 100644
index 0000000..4bcadd0
--- /dev/null
+++ b/classes/linux-raspberrypi-base.bbclass
@@ -0,0 +1,29 @@
+inherit linux-kernel-base
+
+
+def get_dts(d, ver):
+ staging_dir = d.getVar("STAGING_KERNEL_BUILDDIR", True)
+ dts = d.getVar("KERNEL_DEVICETREE", True)
+
+ # d.getVar() might return 'None' as a normal string
+ # leading to 'is None' check isn't enough.
+ # TODO: Investigate if this is a bug in bitbake
+ if ver is None or ver == "None":
+ ''' if 'ver' isn't set try to grab the kernel version
+ from the kernel staging '''
+ ver = get_kernelversion_file(staging_dir)
+
+ if ver is not None:
+ min_ver = ver.split('.', 3)
+ else:
+ return dts
+
+ # Always turn off device tree support for kernel's < 3.18
+ try:
+ if int(min_ver[0]) <= 3:
+ if int(min_ver[1]) < 18:
+ dts = ""
+ except IndexError:
+ min_ver = None
+
+ return dts
diff --git a/classes/sdcard_image-rpi.bbclass b/classes/sdcard_image-rpi.bbclass
index 1ff664d..ca94566 100644
--- a/classes/sdcard_image-rpi.bbclass
+++ b/classes/sdcard_image-rpi.bbclass
@@ -1,4 +1,5 @@
inherit image_types
+inherit linux-raspberrypi-base
#
# Create an image that can by written onto a SD card using dd.
@@ -88,7 +89,8 @@ IMAGE_CMD_rpi-sdimg () {
ROOTFS_SIZE_ALIGNED=$(expr ${ROOTFS_SIZE_ALIGNED} -
${ROOTFS_SIZE_ALIGNED} % ${IMAGE_ROOTFS_ALIGNMENT})
SDIMG_SIZE=$(expr ${IMAGE_ROOTFS_ALIGNMENT} + ${BOOT_SPACE_ALIGNED} +
${ROOTFS_SIZE_ALIGNED})
- echo "Creating filesystem with Boot partition ${BOOT_SPACE_ALIGNED} KiB
and RootFS ${ROOTFS_SIZE_ALIGNED} KiB"
+ # Check if we are building with device tree support
+ DTS="${@get_dts(d, None)}"
# Initialize sdcard image file
dd if=/dev/zero of=${SDIMG} bs=1024 count=0 seek=${SDIMG_SIZE}
@@ -112,7 +114,7 @@ IMAGE_CMD_rpi-sdimg () {
mcopy -i ${WORKDIR}/boot.img -s
${DEPLOY_DIR_IMAGE}/${KERNEL_IMAGETYPE}${KERNEL_INITRAMFS}-${MACHINE}.bin
::uImage
;;
*)
- if test -n "${KERNEL_DEVICETREE}"; then
+ if test -n "${DTS}"; then
# Copy board device trees to root folder
for DTB in ${DT_ROOT}; do
DTB_BASE_NAME=`basename ${DTB} .dtb`
diff --git a/recipes-kernel/linux/linux-raspberrypi.inc
b/recipes-kernel/linux/linux-raspberrypi.inc
index 84d4f9e..7e36408 100644
--- a/recipes-kernel/linux/linux-raspberrypi.inc
+++ b/recipes-kernel/linux/linux-raspberrypi.inc
@@ -1,4 +1,5 @@
require linux.inc
+inherit linux-raspberrypi-base
DESCRIPTION = "Linux Kernel for Raspberry Pi"
SECTION = "kernel"
@@ -26,7 +27,8 @@ UDEV_GE_141 ?= "1"
# See
http://www.yoctoproject.org/docs/current/bitbake-user-manual/bitbake-user-manual.html#anonymous-python-functions
python __anonymous () {
kerneltype = d.getVar('KERNEL_IMAGETYPE', True)
- kerneldt = d.getVar('KERNEL_DEVICETREE', True)
+ kerneldt = get_dts(d, d.getVar('LINUX_VERSION', True))
+ d.setVar("KERNEL_DEVICETREE", kerneldt)
# Add dependency to 'rpi-mkimage-native' package only if RPi bootloader is
used with DT-enable kernel
if kerneldt:
--
1.9.1
--
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