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DESCRIPTION = "Linux Kernel"
SECTION = "kernel"
LICENSE = "GPLv2"
LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
inherit kernel siteinfo
require recipes-kernel/linux/linux-yocto.inc
# Enable OABI compat for people stuck with obsolete userspace
ARM_KEEP_OABI ?= "1"
# Quirk for udev greater or equal 141
UDEV_GE_141 ?= "1"
# You can define CMDLINE_DEBUG as "debug" in your local.conf or distro.conf
# to enable kernel debugging.
CMDLINE_DEBUG ?= ""
CMDLINE_append = " ${CMDLINE_DEBUG}"
KERNEL_INITRAMFS ?= '${@base_conditional("INITRAMFS_IMAGE_BUNDLE", "1", "1", "", d)}'
# Set a variable in .configure
# $1 - Configure variable to be set
# $2 - value [n/y/value]
kernel_configure_variable() {
# Remove the config
CONF_SED_SCRIPT="$CONF_SED_SCRIPT /CONFIG_$1[ =]/d;"
if test "$2" = "n"
then
echo "# CONFIG_$1 is not set" >> ${B}/.config
else
echo "CONFIG_$1=$2" >> ${B}/.config
fi
}
do_configure_prepend() {
# Clean .config
echo "" > ${B}/.config
CONF_SED_SCRIPT=""
# oabi / eabi support
kernel_configure_variable AEABI y
if [ "${ARM_KEEP_OABI}" = "1" ] ; then
kernel_configure_variable OABI_COMPAT y
else
kernel_configure_variable OABI_COMPAT n
fi
# Set cmdline
kernel_configure_variable CMDLINE "\"${CMDLINE}\""
# Localversion
kernel_configure_variable LOCALVERSION "\"\""
kernel_configure_variable LOCALVERSION_AUTO n
# Udev quirks
# Newer versions of udev mandate that sysfs doesn't have deprecated entries
if [ "${UDEV_GE_141}" = "1" ] ; then
kernel_configure_variable SYSFS_DEPRECATED n
kernel_configure_variable SYSFS_DEPRECATED_V2 n
kernel_configure_variable HOTPLUG y
kernel_configure_variable UEVENT_HELPER_PATH "\"\""
kernel_configure_variable UNIX y
kernel_configure_variable SYSFS y
kernel_configure_variable PROC_FS y
kernel_configure_variable TMPFS y
kernel_configure_variable INOTIFY_USER y
kernel_configure_variable SIGNALFD y
kernel_configure_variable TMPFS_POSIX_ACL y
kernel_configure_variable BLK_DEV_BSG y
kernel_configure_variable DEVTMPFS y
kernel_configure_variable DEVTMPFS_MOUNT y
fi
# Newer inits like systemd need cgroup support
if [ "${KERNEL_ENABLE_CGROUPS}" = "1" ] ; then
kernel_configure_variable CGROUP_SCHED y
kernel_configure_variable CGROUPS y
kernel_configure_variable CGROUP_NS y
kernel_configure_variable CGROUP_FREEZER y
kernel_configure_variable CGROUP_DEVICE y
kernel_configure_variable CPUSETS y
kernel_configure_variable PROC_PID_CPUSET y
kernel_configure_variable CGROUP_CPUACCT y
kernel_configure_variable RESOURCE_COUNTERS y
fi
# root-over-nfs-over-usb-eth support. Limited, but should cover some cases
# Enable this by setting a proper CMDLINE_NFSROOT_USB.
if [ ! -z "${CMDLINE_NFSROOT_USB}" ]; then
oenote "Configuring the kernel for root-over-nfs-over-usb-eth with CMDLINE ${CMDLINE_NFSROOT_USB}"
kernel_configure_variable INET y
kernel_configure_variable IP_PNP y
kernel_configure_variable USB_GADGET y
kernel_configure_variable USB_GADGET_SELECTED y
kernel_configure_variable USB_ETH y
kernel_configure_variable NFS_FS y
kernel_configure_variable ROOT_NFS y
kernel_configure_variable ROOT_NFS y
kernel_configure_variable CMDLINE "\"${CMDLINE_NFSROOT_USB}\""
fi
if [ ! -z "${KERNEL_INITRAMFS}" ]; then
kernel_configure_variable BLK_DEV_INITRD y
kernel_configure_variable INITRAMFS_SOURCE ""
kernel_configure_variable RD_GZIP y
kernel_configure_variable OVERLAY_FS y
kernel_configure_variable SQUASHFS y
kernel_configure_variable UBIFS_FS y
fi
# Activate CONFIG_LEGACY_PTYS
kernel_configure_variable LEGACY_PTYS y
# Activate the configuration options for VC4
VC4GRAPHICS="${@bb.utils.contains("MACHINE_FEATURES", "vc4graphics", "1", "0", d)}"
if [ ${VC4GRAPHICS} = "1" ]; then
kernel_configure_variable I2C_BCM2835 y
kernel_configure_variable DRM y
kernel_configure_variable DRM_FBDEV_EMULATION y
kernel_configure_variable DRM_VC4 y
kernel_configure_variable FB_BCM2708 n
fi
# Keep this the last line
# Remove all modified configs and add the rest to .config
sed -e "${CONF_SED_SCRIPT}" < '${WORKDIR}/defconfig' >> '${B}/.config'
yes '' | oe_runmake oldconfig
}
# Automatically depend on lzop-native if CONFIG_KERNEL_LZO is enabled
python () {
try:
defconfig = bb.fetch2.localpath('file://defconfig', d)
except bb.fetch2.FetchError:
return
try:
configfile = open(defconfig)
except IOError:
return
if 'CONFIG_KERNEL_LZO=y\n' in configfile.readlines():
depends = d.getVar('DEPENDS', False)
d.setVar('DEPENDS', depends + ' lzop-native')
configfile.close()
}
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