DESCRIPTION = "Linux Kernel for Raspberry Pi" SECTION = "kernel" LICENSE = "GPLv2" LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7" COMPATIBLE_MACHINE = "^rpi$" PE = "1" PV = "${LINUX_VERSION}+git${SRCPV}" inherit kernel siteinfo require recipes-kernel/linux/linux-yocto.inc SRC_URI += "file://rpi-kernel-misc.cfg" KCONFIG_MODE = "--alldefconfig" KBUILD_DEFCONFIG_raspberrypi0-wifi ?= "bcmrpi_defconfig" KBUILD_DEFCONFIG_raspberrypi ?= "bcmrpi_defconfig" KBUILD_DEFCONFIG_raspberrypi2 ?= "bcm2709_defconfig" KBUILD_DEFCONFIG_raspberrypi3 ?= "bcm2709_defconfig" KBUILD_DEFCONFIG_raspberrypi3-64 ?= "bcmrpi3_defconfig" KBUILD_DEFCONFIG_raspberrypi4 ?= "bcm2711_defconfig" KBUILD_DEFCONFIG_raspberrypi4-64 ?= "bcm2711_defconfig" # CMDLINE for raspberrypi SERIAL = "${@oe.utils.conditional("ENABLE_UART", "1", "console=serial0,115200", "", d)}" CMDLINE ?= "dwc_otg.lpm_enable=0 ${SERIAL} root=/dev/mmcblk0p2 rootfstype=ext4 rootwait" # Add the kernel debugger over console kernel command line option if enabled CMDLINE_append = ' ${@oe.utils.conditional("ENABLE_KGDB", "1", "kgdboc=serial0,115200", "", d)}' # Disable rpi logo on boot CMDLINE_append += ' ${@oe.utils.conditional("DISABLE_RPI_BOOT_LOGO", "1", "logo.nologo", "", d)}' # You can define CMDLINE_DEBUG as "debug" in your local.conf or distro.conf # to enable kernel debugging. CMDLINE_DEBUG ?= "" CMDLINE_append = " ${CMDLINE_DEBUG}" KERNEL_MODULE_AUTOLOAD += "${@bb.utils.contains("MACHINE_FEATURES", "pitft28r", "stmpe-ts", "", d)}" # A LOADADDR is needed when building a uImage format kernel. This value is not # set by default in rpi-4.8.y and later branches so we need to provide it # manually. This value unused if KERNEL_IMAGETYPE is not uImage. KERNEL_EXTRA_ARGS += "LOADADDR=0x00008000" # 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 } config_setup() { # From kernel.bbclass. Unfortunately, this is needed to support builds that # use devtool. The reason is as follows: # # - In devtool builds, externalsrc.bbclass gets inherited and sets a list of # SRCTREECOVEREDTASKS, which don't get run because they affect the source # tree and, when using devtool, we want the developer's changes to be the # single source of truth. kernel-yocto.bbclass adds do_kernel_configme to # SRCTREECOVEREDTASKS, so it doesn't run in a devtool build., In a normal # non-devtool build, do_kernel_configme creates ${B}.config. # # - Normally (e.g. in linux-yocto), it would be OK that do_kernel_configme # doesn't run, because the first few lines of do_configure in kernel.bbclass # populate ${B}.config from either ${S}.config (if it exists) for custom # developer changes, or otherwise from ${WORDIR}/defconfig. # # - In linux-raspberrypi, we add do_configure_prepend, which tweaks # ${B}.config. Since this runs *before* the kernel.bbclass do_configure, # ${B}.config doesn't yet exist and we hit an error. Thus we need to move # the logic from do_configure up to before our do_configure_prepend. Because # we are copying only a portion of do_configure and not the whole thing, # there is no clean way to do it using OE functionality, so we just # copy-and-paste. if [ "${S}" != "${B}" ] && [ -f "${S}/.config" ] && [ ! -f "${B}/.config" ]; then mv "${S}/.config" "${B}/.config" fi # Copy defconfig to .config if .config does not exist. This allows # recipes to manage the .config themselves in do_configure_prepend(). if [ -f "${WORKDIR}/defconfig" ] && [ ! -f "${B}/.config" ]; then cp "${WORKDIR}/defconfig" "${B}/.config" fi } do_configure_prepend() { config_setup mv -f ${B}/.config ${B}/.config.patched CONF_SED_SCRIPT="" # Localversion kernel_configure_variable LOCALVERSION "\"\"" if [ "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then kernel_configure_variable OVERLAY_FS y kernel_configure_variable SQUASHFS y kernel_configure_variable UBIFS_FS y fi # 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 fi # Keep this the last line # Remove all modified configs and add the rest to .config sed -e "${CONF_SED_SCRIPT}" < '${B}/.config.patched' >> '${B}/.config' rm -f ${B}/.config.patched } do_compile_append() { if [ "${SITEINFO_BITS}" = "64" ]; then cc_extra=$(get_cc_option) oe_runmake dtbs CC="${KERNEL_CC} $cc_extra " LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS} fi } do_deploy_append() { # Deploy cmdline.txt install -d ${DEPLOYDIR}/bcm2835-bootfiles PITFT="${@bb.utils.contains("MACHINE_FEATURES", "pitft", "1", "0", d)}" if [ ${PITFT} = "1" ]; then PITFT_PARAMS="fbcon=map:10 fbcon=font:VGA8x8" fi echo "${CMDLINE}${PITFT_PARAMS}" > ${DEPLOYDIR}/bcm2835-bootfiles/cmdline.txt }