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authorPetter Mab├Ącker <petter@technux.se>2015-05-25 16:59:21 +0200
committerAndrei Gherzan <andrei.gherzan@windriver.com>2015-06-05 14:49:46 +0200
commit4a4373c02d3d8355a2e5faa10af61450e5b093d8 (patch)
treedda67ceb2186e3472ec242693de1887985b2ad90
parent6ef9d94a2c2588dcefe442577ef6ae5bbe722dec (diff)
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devicetree: auto-disable dts for old kernels
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 Mab├Ącker <petter@technux.se>
-rw-r--r--classes/linux-raspberrypi-base.bbclass39
-rw-r--r--classes/sdcard_image-rpi.bbclass15
-rw-r--r--recipes-kernel/linux/linux-raspberrypi.inc4
3 files changed, 51 insertions, 7 deletions
diff --git a/classes/linux-raspberrypi-base.bbclass b/classes/linux-raspberrypi-base.bbclass
new file mode 100644
index 0000000..40beef1
--- /dev/null
+++ b/classes/linux-raspberrypi-base.bbclass
@@ -0,0 +1,39 @@
+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
+
+
+def split_overlays(d, out):
+ dts = get_dts(d, None)
+ if out:
+ overlays = oe.utils.str_filter_out('\S+\-overlay\.dtb$', dts, d)
+ else:
+ overlays = oe.utils.str_filter('\S+\-overlay\.dtb$', dts, d)
+
+ return overlays
diff --git a/classes/sdcard_image-rpi.bbclass b/classes/sdcard_image-rpi.bbclass
index 1ff664d..7592cc1 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.
@@ -70,11 +71,6 @@ SDIMG = "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}.rootfs.rpi-sdimg"
# Additional files and/or directories to be copied into the vfat partition from the IMAGE_ROOTFS.
FATPAYLOAD ?= ""
-# Device Tree Overlays are assumed to be suffixed by '-overlay.dtb' string and will be put in a dedicated folder
-DT_ALL = "${@d.getVar('KERNEL_DEVICETREE', True) or ''}"
-DT_OVERLAYS = "${@oe.utils.str_filter('\S+\-overlay\.dtb$', '${DT_ALL}', d)}"
-DT_ROOT = "${@oe.utils.str_filter_out('\S+\-overlay\.dtb$', '${DT_ALL}', d)}"
-
IMAGEDATESTAMP = "${@time.strftime('%Y.%m.%d',time.gmtime())}"
IMAGE_CMD_rpi-sdimg () {
@@ -90,6 +86,9 @@ IMAGE_CMD_rpi-sdimg () {
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 +111,11 @@ 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
+ # Device Tree Overlays are assumed to be suffixed by '-overlay.dtb' string and will be put in a dedicated folder
+ DT_OVERLAYS="${@split_overlays(d, 0)}"
+ DT_ROOT="${@split_overlays(d, 1)}"
+
# 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: