be529e2218
The current prompt seems to imply that we want to add Device Tree
support to the Linux kernel:
[*] Device tree support
But what it really means is that Buildroot will build a DTB.
Change the prompt so that it is obvious that this is the intended
behaviour, and users do not get mislead as to why Device Tree support is
not automatically added to their Linux kernel.
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
354 lines
10 KiB
Plaintext
354 lines
10 KiB
Plaintext
menu "Kernel"
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config BR2_LINUX_KERNEL
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bool "Linux Kernel"
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help
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Enable this option if you want to build a Linux kernel for
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your embedded device
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if BR2_LINUX_KERNEL
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#
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# Version selection. We provide the choice between:
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#
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# 1. A single fairly recent stable kernel version
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# 2. In case an internal toolchain has been built, the same kernel
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# version as the kernel headers
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# 3. A custom stable version
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# 4. A custom tarball
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#
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choice
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prompt "Kernel version"
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config BR2_LINUX_KERNEL_LATEST_VERSION
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bool "3.18.1"
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config BR2_LINUX_KERNEL_SAME_AS_HEADERS
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bool "Same as toolchain kernel headers"
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depends on BR2_TOOLCHAIN_BUILDROOT
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help
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This option will re-use the same kernel sources as the one
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that have been used for the kernel headers of the
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cross-compiling toolchain. Having the same version for the
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kernel running on the system and for the kernel headers is
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not a requirement, but using the same version allows to
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download only one tarball of the kernel sources.
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config BR2_LINUX_KERNEL_CUSTOM_VERSION
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bool "Custom version"
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help
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This option allows to use a specific official version from
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kernel.org, like 2.6.x, 2.6.x.y, 3.x.y, ...
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Note: you cannot use this option to select a _longterm_ 2.6
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kernel, because these kernels are not located at the standard
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URL at kernel.org. Instead, select "Custom tarball" and
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specify the right URL directly.
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config BR2_LINUX_KERNEL_CUSTOM_TARBALL
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bool "Custom tarball"
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help
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This option allows to specify the http or ftp location of a
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specific kernel source tarball
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config BR2_LINUX_KERNEL_CUSTOM_GIT
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bool "Custom Git repository"
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help
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This option allows Buildroot to get the Linux kernel source
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code from a Git repository.
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config BR2_LINUX_KERNEL_CUSTOM_HG
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bool "Custom Mercurial repository"
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help
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This option allows Buildroot to get the Linux kernel source
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code from a Mercurial repository.
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config BR2_LINUX_KERNEL_CUSTOM_LOCAL
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bool "Local directory"
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help
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This option allows Buildroot to get the Linux kernel source
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code from a local directory.
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endchoice
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config BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE
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string "Kernel version"
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depends on BR2_LINUX_KERNEL_CUSTOM_VERSION
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config BR2_LINUX_KERNEL_CUSTOM_TARBALL_LOCATION
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string "URL of custom kernel tarball"
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depends on BR2_LINUX_KERNEL_CUSTOM_TARBALL
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if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG
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config BR2_LINUX_KERNEL_CUSTOM_REPO_URL
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string "URL of custom repository"
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default BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL \
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if BR2_LINUX_KERNEL_CUSTOM_GIT_REPO_URL != "" # legacy
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config BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION
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string "Custom repository version"
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default BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION \
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if BR2_LINUX_KERNEL_CUSTOM_GIT_VERSION != "" # legacy
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help
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Revision to use in the typical format used by Git/Mercurial
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E.G. a sha id, a tag, branch, ..
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endif
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config BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH
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string "Path to the local directory"
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depends on BR2_LINUX_KERNEL_CUSTOM_LOCAL
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help
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Path to the local directory with the Linux kernel source code.
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config BR2_LINUX_KERNEL_VERSION
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string
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default "3.18.1" if BR2_LINUX_KERNEL_LATEST_VERSION
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default BR2_DEFAULT_KERNEL_HEADERS if BR2_LINUX_KERNEL_SAME_AS_HEADERS
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default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE \
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if BR2_LINUX_KERNEL_CUSTOM_VERSION
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default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL
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default BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION \
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if BR2_LINUX_KERNEL_CUSTOM_GIT || BR2_LINUX_KERNEL_CUSTOM_HG
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default "custom" if BR2_LINUX_KERNEL_CUSTOM_LOCAL
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#
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# Patch selection
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#
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config BR2_LINUX_KERNEL_PATCH
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string "Custom kernel patches"
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help
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A space-separated list of patches to apply to the
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kernel. Each patch can be described as an URL, a local file
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path, or a directory. In the case of a directory, all files
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matching linux-*.patch in the directory will be applied.
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#
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# Configuration selection
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#
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choice
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prompt "Kernel configuration"
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default BR2_LINUX_KERNEL_USE_DEFCONFIG
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config BR2_LINUX_KERNEL_USE_DEFCONFIG
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bool "Using a defconfig"
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config BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
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bool "Using a custom config file"
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endchoice
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config BR2_LINUX_KERNEL_DEFCONFIG
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string "Defconfig name"
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depends on BR2_LINUX_KERNEL_USE_DEFCONFIG
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help
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Name of the kernel defconfig file to use, without the
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trailing _defconfig. The defconfig is located in
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arch/<arch>/configs in the kernel tree.
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config BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE
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string "Configuration file path"
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depends on BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG
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help
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Path to the kernel configuration file
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#
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# Binary format
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#
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config BR2_LINUX_KERNEL_UBOOT_IMAGE
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bool
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choice
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prompt "Kernel binary format"
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config BR2_LINUX_KERNEL_UIMAGE
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bool "uImage"
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depends on BR2_arc || BR2_arm || BR2_armeb || BR2_bfin || \
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BR2_powerpc || BR2_avr32 || BR2_sh || BR2_sh64 || \
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BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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config BR2_LINUX_KERNEL_APPENDED_UIMAGE
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bool "uImage with appended DT"
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depends on BR2_arm || BR2_armeb
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_APPENDED_DTB
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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config BR2_LINUX_KERNEL_BZIMAGE
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bool "bzImage"
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depends on BR2_i386 || BR2_x86_64
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config BR2_LINUX_KERNEL_ZIMAGE
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bool "zImage"
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depends on BR2_arm || BR2_armeb || BR2_powerpc || \
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BR2_powerpc64 || BR2_powerpc64le || BR2_sparc || \
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BR2_sh || BR2_sh64 || BR2_xtensa
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config BR2_LINUX_KERNEL_APPENDED_ZIMAGE
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bool "zImage with appended DT"
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depends on BR2_arm || BR2_armeb
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_APPENDED_DTB
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config BR2_LINUX_KERNEL_CUIMAGE
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bool "cuImage"
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depends on BR2_powerpc
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
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config BR2_LINUX_KERNEL_SIMPLEIMAGE
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bool "simpleImage"
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depends on BR2_microblaze
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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select BR2_LINUX_KERNEL_DTS_SUPPORT
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select BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
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config BR2_LINUX_KERNEL_LINUX_BIN
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bool "linux.bin"
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depends on BR2_microblaze
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select BR2_LINUX_KERNEL_UBOOT_IMAGE
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config BR2_LINUX_KERNEL_VMLINUX_BIN
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bool "vmlinux.bin"
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depends on BR2_mips || BR2_mipsel || BR2_sh || BR2_sh64
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config BR2_LINUX_KERNEL_VMLINUX
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bool "vmlinux"
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config BR2_LINUX_KERNEL_VMLINUZ
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bool "vmlinuz"
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depends on BR2_mips || BR2_mipsel
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config BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
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bool "custom target"
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help
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For certain cases a board-specific target image must be
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used. For example, on powerPC where the OpenFirmware
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description is attached in a board-specific kernel image
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target like 'cuImage.mpc8379_rdb'.
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Select this option and specify the make target in "Kernel
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image target name".
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endchoice
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config BR2_LINUX_KERNEL_IMAGE_TARGET_NAME
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string "Kernel image target name"
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depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
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help
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Specify the kernel make target to build the kernel that you
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need.
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config BR2_LINUX_KERNEL_IMAGE_NAME
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string "Kernel image name"
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depends on BR2_LINUX_KERNEL_IMAGE_TARGET_CUSTOM
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help
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The filename of the kernel image, if it is different from the
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make target (above). Only Xtensa uses a filename different from
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the make target. Defaults to BR2_LINUX_KERNEL_IMAGE_TARGET_NAME.
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If unsure, leave it empty.
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config BR2_LINUX_KERNEL_UIMAGE_LOADADDR
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string "load address (for 3.7+ multi-platform image)"
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depends on BR2_arm || BR2_armeb
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depends on BR2_LINUX_KERNEL_UIMAGE || BR2_LINUX_KERNEL_APPENDED_UIMAGE
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help
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If your ARM system's Linux kernel is configured with the new (3.7+)
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multi-architecture support (CONFIG_ARCH_MULTIPLATFORM=y in your
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kernel config), then it is necessary to specify a kernel load address
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when building the uImage. This should be a hexadecimal string
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beginning with 0x, for example: 0x00008000.
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If unsure, let this option empty.
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config BR2_LINUX_KERNEL_DTS_SUPPORT
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bool "Build a Device Tree Blob (DTB)"
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help
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Compile one or more device tree sources into device tree blobs.
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Select the dts files to compile in the options below.
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if BR2_LINUX_KERNEL_DTS_SUPPORT
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# We have mainly three cases when it comes to device tree support:
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# 1) We don't want any support at all. Then the ..DTS_SUPPORT
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# variable won't be set
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# 2) We want device tree support, so we need the user to enter
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# the device tree name or the the path to the custom device
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# he uses, but the kernel abstracts this from us and only
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# build an image that looks like a regular kernel image. In
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# this case, we only need to derive the kernel image name from
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# the given device tree name, and all the rest is as usual
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# 3) We want device tree support, but the kernel requires us to
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# build the device tree blob separately. In this case, some
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# more logic will be needed.
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# The variable below address the second case, were you only want
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# limited actions from buildroot.
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config BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT
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bool
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config BR2_LINUX_KERNEL_APPENDED_DTB
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bool
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choice
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prompt "Device tree source"
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default BR2_LINUX_KERNEL_USE_INTREE_DTS
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config BR2_LINUX_KERNEL_USE_INTREE_DTS
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bool "Use a device tree present in the kernel."
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help
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Use a device tree source distributed with
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the kernel sources. The dts files are located
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in the arch/<arch>/boot/dts folder.
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config BR2_LINUX_KERNEL_USE_CUSTOM_DTS
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bool "Use a custom device tree file"
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help
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Use a custom device tree file, i.e, a device
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tree file that does not belong to the kernel
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source tree.
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endchoice
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config BR2_LINUX_KERNEL_INTREE_DTS_NAME
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string "Device Tree Source file names"
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depends on BR2_LINUX_KERNEL_USE_INTREE_DTS
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help
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Name of the device tree source file, without
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the trailing .dts. You can provide a list of
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dts files to build, separated by spaces.
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config BR2_LINUX_KERNEL_CUSTOM_DTS_PATH
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string "Device Tree Source file paths"
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depends on BR2_LINUX_KERNEL_USE_CUSTOM_DTS
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help
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Path to the device tree source files. You can
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provide a list of dts paths to copy and build,
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separated by spaces.
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endif
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config BR2_LINUX_KERNEL_INSTALL_TARGET
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bool "Install kernel image to /boot in target"
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depends on !BR2_TARGET_ROOTFS_INITRAMFS
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help
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Select this option to have the kernel image installed to
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/boot in the target root filesystem, as is typically done on
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x86/x86_64 systems.
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Note that this option also installs the Device Tree Blobs to
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/boot if DTBs have been generated by the kernel build
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process.
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# Linux extensions
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source "linux/Config.ext.in"
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endif # BR2_LINUX_KERNEL
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endmenu
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