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Patrick Williams8b8bc412016-08-17 15:02:23 -05001DESCRIPTION = "Linux Kernel for Raspberry Pi"
2SECTION = "kernel"
3LICENSE = "GPLv2"
4LIC_FILES_CHKSUM = "file://COPYING;md5=d7810fab7487fb0aad327b76f1be7cd7"
5
Brad Bishopd7bf8c12018-02-25 22:55:05 -05006COMPATIBLE_MACHINE = "^rpi$"
Patrick Williams8b8bc412016-08-17 15:02:23 -05007
8PE = "1"
9PV = "${LINUX_VERSION}+git${SRCPV}"
10
Brad Bishopd7bf8c12018-02-25 22:55:05 -050011inherit kernel siteinfo
12require recipes-kernel/linux/linux-yocto.inc
13
Brad Bishop9392c692018-09-07 15:37:17 +010014SRC_URI += "file://rpi-kernel-misc.cfg"
15
Brad Bishopd7bf8c12018-02-25 22:55:05 -050016KCONFIG_MODE = "--alldefconfig"
17KBUILD_DEFCONFIG_raspberrypi0-wifi ?= "bcmrpi_defconfig"
18KBUILD_DEFCONFIG_raspberrypi ?= "bcmrpi_defconfig"
Brad Bishop1b9ee292020-01-16 09:06:00 -050019KBUILD_DEFCONFIG_raspberrypi-cm3 ?= "bcm2709_defconfig"
Brad Bishopd7bf8c12018-02-25 22:55:05 -050020KBUILD_DEFCONFIG_raspberrypi2 ?= "bcm2709_defconfig"
21KBUILD_DEFCONFIG_raspberrypi3 ?= "bcm2709_defconfig"
22KBUILD_DEFCONFIG_raspberrypi3-64 ?= "bcmrpi3_defconfig"
Brad Bishop26bdd442019-08-16 17:08:17 -040023KBUILD_DEFCONFIG_raspberrypi4 ?= "bcm2711_defconfig"
24KBUILD_DEFCONFIG_raspberrypi4-64 ?= "bcm2711_defconfig"
Patrick Williams8b8bc412016-08-17 15:02:23 -050025
Brad Bishop870eb532020-01-06 09:44:45 -050026LINUX_VERSION_EXTENSION ?= ""
27
Patrick Williams8b8bc412016-08-17 15:02:23 -050028# CMDLINE for raspberrypi
Brad Bishop316dfdd2018-06-25 12:45:53 -040029SERIAL = "${@oe.utils.conditional("ENABLE_UART", "1", "console=serial0,115200", "", d)}"
30CMDLINE ?= "dwc_otg.lpm_enable=0 ${SERIAL} root=/dev/mmcblk0p2 rootfstype=ext4 rootwait"
Patrick Williams8b8bc412016-08-17 15:02:23 -050031
32# Add the kernel debugger over console kernel command line option if enabled
Brad Bishop316dfdd2018-06-25 12:45:53 -040033CMDLINE_append = ' ${@oe.utils.conditional("ENABLE_KGDB", "1", "kgdboc=serial0,115200", "", d)}'
Patrick Williams8b8bc412016-08-17 15:02:23 -050034
Brad Bishopd7bf8c12018-02-25 22:55:05 -050035# Disable rpi logo on boot
Brad Bishop316dfdd2018-06-25 12:45:53 -040036CMDLINE_append += ' ${@oe.utils.conditional("DISABLE_RPI_BOOT_LOGO", "1", "logo.nologo", "", d)}'
Brad Bishopd7bf8c12018-02-25 22:55:05 -050037
38# You can define CMDLINE_DEBUG as "debug" in your local.conf or distro.conf
39# to enable kernel debugging.
40CMDLINE_DEBUG ?= ""
41CMDLINE_append = " ${CMDLINE_DEBUG}"
42
Patrick Williams8b8bc412016-08-17 15:02:23 -050043KERNEL_MODULE_AUTOLOAD += "${@bb.utils.contains("MACHINE_FEATURES", "pitft28r", "stmpe-ts", "", d)}"
44
Brad Bishopd7bf8c12018-02-25 22:55:05 -050045# A LOADADDR is needed when building a uImage format kernel. This value is not
46# set by default in rpi-4.8.y and later branches so we need to provide it
47# manually. This value unused if KERNEL_IMAGETYPE is not uImage.
48KERNEL_EXTRA_ARGS += "LOADADDR=0x00008000"
49
50# Set a variable in .configure
51# $1 - Configure variable to be set
52# $2 - value [n/y/value]
53kernel_configure_variable() {
54 # Remove the config
55 CONF_SED_SCRIPT="$CONF_SED_SCRIPT /CONFIG_$1[ =]/d;"
56 if test "$2" = "n"
57 then
58 echo "# CONFIG_$1 is not set" >> ${B}/.config
59 else
60 echo "CONFIG_$1=$2" >> ${B}/.config
61 fi
Patrick Williams8b8bc412016-08-17 15:02:23 -050062}
63
Brad Bishop316dfdd2018-06-25 12:45:53 -040064config_setup() {
65 # From kernel.bbclass. Unfortunately, this is needed to support builds that
66 # use devtool. The reason is as follows:
67 #
68 # - In devtool builds, externalsrc.bbclass gets inherited and sets a list of
69 # SRCTREECOVEREDTASKS, which don't get run because they affect the source
70 # tree and, when using devtool, we want the developer's changes to be the
71 # single source of truth. kernel-yocto.bbclass adds do_kernel_configme to
72 # SRCTREECOVEREDTASKS, so it doesn't run in a devtool build., In a normal
73 # non-devtool build, do_kernel_configme creates ${B}.config.
74 #
75 # - Normally (e.g. in linux-yocto), it would be OK that do_kernel_configme
76 # doesn't run, because the first few lines of do_configure in kernel.bbclass
77 # populate ${B}.config from either ${S}.config (if it exists) for custom
78 # developer changes, or otherwise from ${WORDIR}/defconfig.
79 #
80 # - In linux-raspberrypi, we add do_configure_prepend, which tweaks
81 # ${B}.config. Since this runs *before* the kernel.bbclass do_configure,
82 # ${B}.config doesn't yet exist and we hit an error. Thus we need to move
83 # the logic from do_configure up to before our do_configure_prepend. Because
84 # we are copying only a portion of do_configure and not the whole thing,
85 # there is no clean way to do it using OE functionality, so we just
86 # copy-and-paste.
87 if [ "${S}" != "${B}" ] && [ -f "${S}/.config" ] && [ ! -f "${B}/.config" ]; then
88 mv "${S}/.config" "${B}/.config"
89 fi
90
91 # Copy defconfig to .config if .config does not exist. This allows
92 # recipes to manage the .config themselves in do_configure_prepend().
93 if [ -f "${WORKDIR}/defconfig" ] && [ ! -f "${B}/.config" ]; then
94 cp "${WORKDIR}/defconfig" "${B}/.config"
95 fi
96}
97
Brad Bishopd7bf8c12018-02-25 22:55:05 -050098do_configure_prepend() {
Brad Bishop316dfdd2018-06-25 12:45:53 -040099 config_setup
100
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500101 mv -f ${B}/.config ${B}/.config.patched
102 CONF_SED_SCRIPT=""
103
Brad Bishop1a4b7ee2018-12-16 17:11:34 -0800104 if [ "${INITRAMFS_IMAGE_BUNDLE}" = "1" ]; then
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500105 kernel_configure_variable OVERLAY_FS y
106 kernel_configure_variable SQUASHFS y
107 kernel_configure_variable UBIFS_FS y
108 fi
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500109
110 # Activate the configuration options for VC4
111 VC4GRAPHICS="${@bb.utils.contains("MACHINE_FEATURES", "vc4graphics", "1", "0", d)}"
Brad Bishop1a4b7ee2018-12-16 17:11:34 -0800112 if [ "${VC4GRAPHICS}" = "1" ]; then
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500113 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
117 fi
118
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 ${B}/.config.patched
Brad Bishopd7bf8c12018-02-25 22:55:05 -0500123}
124
Brad Bishop26bdd442019-08-16 17:08:17 -0400125do_compile_append() {
126 if [ "${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}
129 fi
Patrick Williams8b8bc412016-08-17 15:02:23 -0500130}
131
Patrick Williams8b8bc412016-08-17 15:02:23 -0500132do_deploy_append() {
133 # Deploy cmdline.txt
134 install -d ${DEPLOYDIR}/bcm2835-bootfiles
135 PITFT="${@bb.utils.contains("MACHINE_FEATURES", "pitft", "1", "0", d)}"
136 if [ ${PITFT} = "1" ]; then
137 PITFT_PARAMS="fbcon=map:10 fbcon=font:VGA8x8"
138 fi
139 echo "${CMDLINE}${PITFT_PARAMS}" > ${DEPLOYDIR}/bcm2835-bootfiles/cmdline.txt
140}