diff options
Diffstat (limited to 'meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi.inc')
| -rw-r--r-- | meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi.inc | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi.inc b/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi.inc new file mode 100644 index 000000000..65c2ab759 --- /dev/null +++ b/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi.inc @@ -0,0 +1,136 @@ +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${SRCPV}" + +inherit kernel siteinfo +require recipes-kernel/linux/linux-yocto.inc + +KCONFIG_MODE = "--alldefconfig" +KBUILD_DEFCONFIG_raspberrypi0-wifi ?= "bcmrpi_defconfig" +KBUILD_DEFCONFIG_raspberrypi ?= "bcmrpi_defconfig" +KBUILD_DEFCONFIG_raspberrypi2 ?= "bcm2709_defconfig" +KBUILD_DEFCONFIG_raspberrypi3 ?= "bcm2709_defconfig" +KBUILD_DEFCONFIG_raspberrypi3-64 ?= "bcmrpi3_defconfig" + +# CMDLINE for raspberrypi +SERIAL = "${@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 = " ${CMDLINE_DEBUG}" + +KERNEL_INITRAMFS ?= '${@oe.utils.conditional("INITRAMFS_IMAGE_BUNDLE", "1", "1", "", d)}' + +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 ${B}/.config.patched + CONF_SED_SCRIPT="" + + # Localversion + kernel_configure_variable LOCALVERSION "\"\"" + + if [ ! -z "${KERNEL_INITRAMFS}" ]; 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 ${B}/.config.patched +} + +do_compile_append_raspberrypi3-64() { + cc_extra=$(get_cc_option) + oe_runmake dtbs CC="${KERNEL_CC} $cc_extra " LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS} +} + +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 +} |
