1 DESCRIPTION = "Linux Kernel for Raspberry Pi"
4 LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
6 COMPATIBLE_MACHINE = "^rpi$"
9 PV = "${LINUX_VERSION}+git${SRCPV}"
11 inherit kernel siteinfo
12 require recipes-kernel/linux/linux-yocto.inc
14 SRC_URI += "file://rpi-kernel-misc.cfg"
16 KCONFIG_MODE = "--alldefconfig"
17 KBUILD_DEFCONFIG_raspberrypi0-wifi ?= "bcmrpi_defconfig"
18 KBUILD_DEFCONFIG_raspberrypi ?= "bcmrpi_defconfig"
19 KBUILD_DEFCONFIG_raspberrypi2 ?= "bcm2709_defconfig"
20 KBUILD_DEFCONFIG_raspberrypi3 ?= "bcm2709_defconfig"
21 KBUILD_DEFCONFIG_raspberrypi3-64 ?= "bcmrpi3_defconfig"
22 KBUILD_DEFCONFIG_raspberrypi4 ?= "bcm2711_defconfig"
23 KBUILD_DEFCONFIG_raspberrypi4-64 ?= "bcm2711_defconfig"
25 # CMDLINE for raspberrypi
26 SERIAL = "${@oe.utils.conditional("ENABLE_UART", "1", "console=serial0,115200", "", d)}"
27 CMDLINE ?= "dwc_otg.lpm_enable=0 ${SERIAL} root=/dev/mmcblk0p2 rootfstype=ext4 rootwait"
29 # Add the kernel debugger over console kernel command line option if enabled
30 CMDLINE_append = ' ${@oe.utils.conditional("ENABLE_KGDB", "1", "kgdboc=serial0,115200", "", d)}'
32 # Disable rpi logo on boot
33 CMDLINE_append += ' ${@oe.utils.conditional("DISABLE_RPI_BOOT_LOGO", "1", "logo.nologo", "", d)}'
35 # You can define CMDLINE_DEBUG as "debug" in your local.conf or distro.conf
36 # to enable kernel debugging.
38 CMDLINE_append = " ${CMDLINE_DEBUG}"
40 KERNEL_MODULE_AUTOLOAD += "${@bb.utils.contains("MACHINE_FEATURES", "pitft28r", "stmpe-ts", "", d)}"
42 # A LOADADDR is needed when building a uImage format kernel. This value is not
43 # set by default in rpi-4.8.y and later branches so we need to provide it
44 # manually. This value unused if KERNEL_IMAGETYPE is not uImage.
45 KERNEL_EXTRA_ARGS += "LOADADDR=0x00008000"
47 # Set a variable in .configure
48 # $1 - Configure variable to be set
49 # $2 - value [n/y/value]
50 kernel_configure_variable() {
52 CONF_SED_SCRIPT="$CONF_SED_SCRIPT /CONFIG_$1[ =]/d;"
55 echo "# CONFIG_$1 is not set" >> ${B}/.config
57 echo "CONFIG_$1=$2" >> ${B}/.config
62 # From kernel.bbclass. Unfortunately, this is needed to support builds that
63 # use devtool. The reason is as follows:
65 # - In devtool builds, externalsrc.bbclass gets inherited and sets a list of
66 # SRCTREECOVEREDTASKS, which don't get run because they affect the source
67 # tree and, when using devtool, we want the developer's changes to be the
68 # single source of truth. kernel-yocto.bbclass adds do_kernel_configme to
69 # SRCTREECOVEREDTASKS, so it doesn't run in a devtool build., In a normal
70 # non-devtool build, do_kernel_configme creates ${B}.config.
72 # - Normally (e.g. in linux-yocto), it would be OK that do_kernel_configme
73 # doesn't run, because the first few lines of do_configure in kernel.bbclass
74 # populate ${B}.config from either ${S}.config (if it exists) for custom
75 # developer changes, or otherwise from ${WORDIR}/defconfig.
77 # - In linux-raspberrypi, we add do_configure_prepend, which tweaks
78 # ${B}.config. Since this runs *before* the kernel.bbclass do_configure,
79 # ${B}.config doesn't yet exist and we hit an error. Thus we need to move
80 # the logic from do_configure up to before our do_configure_prepend. Because
81 # we are copying only a portion of do_configure and not the whole thing,
82 # there is no clean way to do it using OE functionality, so we just
84 if [ "${S}" != "${B}" ] && [ -f "${S}/.config" ] && [ ! -f "${B}/.config" ]; then
85 mv "${S}/.config" "${B}/.config"
88 # Copy defconfig to .config if .config does not exist. This allows
89 # recipes to manage the .config themselves in do_configure_prepend().
90 if [ -f "${WORKDIR}/defconfig" ] && [ ! -f "${B}/.config" ]; then
91 cp "${WORKDIR}/defconfig" "${B}/.config"
95 do_configure_prepend() {
98 mv -f ${B}/.config ${B}/.config.patched
102 kernel_configure_variable LOCALVERSION "\"\""
104 if [ "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then
105 kernel_configure_variable OVERLAY_FS y
106 kernel_configure_variable SQUASHFS y
107 kernel_configure_variable UBIFS_FS y
110 # Activate the configuration options for VC4
111 VC4GRAPHICS="${@bb.utils.contains("MACHINE_FEATURES", "vc4graphics", "1", "0", d)}"
112 if [ "${VC4GRAPHICS}" = "1" ]; then
113 kernel_configure_variable I2C_BCM2835 y
114 kernel_configure_variable DRM y
115 kernel_configure_variable DRM_FBDEV_EMULATION y
116 kernel_configure_variable DRM_VC4 y
119 # Keep this the last line
120 # Remove all modified configs and add the rest to .config
121 sed -e "${CONF_SED_SCRIPT}" < '${B}/.config.patched' >> '${B}/.config'
122 rm -f ${B}/.config.patched
125 do_compile_append() {
126 if [ "${SITEINFO_BITS}" = "64" ]; then
127 cc_extra=$(get_cc_option)
128 oe_runmake dtbs CC="${KERNEL_CC} $cc_extra " LD="${KERNEL_LD}" ${KERNEL_EXTRA_ARGS}
134 install -d ${DEPLOYDIR}/bcm2835-bootfiles
135 PITFT="${@bb.utils.contains("MACHINE_FEATURES", "pitft", "1", "0", d)}"
136 if [ ${PITFT} = "1" ]; then
137 PITFT_PARAMS="fbcon=map:10 fbcon=font:VGA8x8"
139 echo "${CMDLINE}${PITFT_PARAMS}" > ${DEPLOYDIR}/bcm2835-bootfiles/cmdline.txt