mirror of
git://git.yoctoproject.org/meta-raspberrypi.git
synced 2025-07-19 21:09:03 +02:00
0a4a68dba6
* The defconfigs from the RPi Kernel set `powersave` as the default CPU governor, which is a bad idea as that reduces performance by setting the CPU frequency to the minimum one. * In case of a Yocto build user-space is not configured by default to change the CPU governor, so `powersave` will remain the CPU governor and it will slow down everything. * I submitted a fix for those defconfigs to upstream here: https://github.com/raspberrypi/linux/pull/5666 However, we shouldn't wait until that is accepted and backported to all the stable branches (if ever is). * This patch unsets the selection of `powersave` as the default CPU governor. * Then the CPU governor that will be selected as default after this patch will be the Linux's default one that is either `ondemand` or `schedutil` depending on the Kernel version. Signed-off-by: Carlos Alberto Lopez Perez <clopez@igalia.com>
48 lines
1.7 KiB
HTML
48 lines
1.7 KiB
HTML
DESCRIPTION = "Linux Kernel for Raspberry Pi"
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SECTION = "kernel"
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LICENSE = "GPL-2.0-only"
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LIC_FILES_CHKSUM = "file://COPYING;md5=6bc538ed5bd9a7fc9398086aedcd7e46"
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COMPATIBLE_MACHINE ?= "^rpi$"
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PE = "1"
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PV = "${LINUX_VERSION}+git${SRCPV}"
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inherit siteinfo
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require recipes-kernel/linux/linux-yocto.inc
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SRC_URI += " \
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${@bb.utils.contains("INITRAMFS_IMAGE_BUNDLE", "1", "file://initramfs-image-bundle.cfg", "", d)} \
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${@bb.utils.contains("MACHINE_FEATURES", "vc4graphics", "file://vc4graphics.cfg", "", d)} \
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${@bb.utils.contains("MACHINE_FEATURES", "wm8960", "file://wm8960.cfg", "", d)} \
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file://default-cpu-governor.cfg \
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"
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SRC_URI:append:raspberrypi4 = " \
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file://rpi4-nvmem.cfg \
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"
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KCONFIG_MODE = "--alldefconfig"
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KBUILD_DEFCONFIG:raspberrypi0-wifi ?= "bcmrpi_defconfig"
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KBUILD_DEFCONFIG:raspberrypi ?= "bcmrpi_defconfig"
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KBUILD_DEFCONFIG:raspberrypi-cm3 ?= "bcm2709_defconfig"
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KBUILD_DEFCONFIG:raspberrypi2 ?= "bcm2709_defconfig"
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KBUILD_DEFCONFIG:raspberrypi3 ?= "bcm2709_defconfig"
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KBUILD_DEFCONFIG:raspberrypi3-64 ?= "bcmrpi3_defconfig"
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KBUILD_DEFCONFIG:raspberrypi4 ?= "bcm2711_defconfig"
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KBUILD_DEFCONFIG:raspberrypi4-64 ?= "bcm2711_defconfig"
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KBUILD_DEFCONFIG:raspberrypi-armv7 ?= "bcm2711_defconfig"
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KBUILD_DEFCONFIG:raspberrypi-armv8 ?= "bcm2711_defconfig"
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LINUX_VERSION_EXTENSION ?= ""
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KERNEL_MODULE_AUTOLOAD += "${@bb.utils.contains("MACHINE_FEATURES", "pitft28r", "stmpe-ts", "", d)}"
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# A LOADADDR is needed when building a uImage format kernel. This value is not
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# set by default in rpi-4.8.y and later branches so we need to provide it
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# manually. This value unused if KERNEL_IMAGETYPE is not uImage.
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KERNEL_EXTRA_ARGS += "LOADADDR=${UBOOT_ENTRYPOINT}"
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UBOOT_ENTRYPOINT = "0x00008000"
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UBOOT_LOADADDRESS = "0x00008000"
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