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| author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2012-07-30 14:32:47 +0200 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2012-07-31 23:08:28 +0200 |
| commit | 978928e4acb0ee4e335eaf4bf8feca895f372418 (patch) | |
| tree | 9134843de308b9ec8b3753a8bf53b032607f2aa6 /linux/Config.in | |
| parent | 902609fbb31506dfe04f100c9c8099fbfa8095a1 (diff) | |
| download | buildroot-novena-978928e4acb0ee4e335eaf4bf8feca895f372418.tar.gz buildroot-novena-978928e4acb0ee4e335eaf4bf8feca895f372418.zip | |
Add support for appended device tree blobs for arm
This patch adds support for the ARM-only appended device tree
mechanism present in the kernel.
This option allows to add at the end of the kernel image the
device tree blob so that we can still boot device tree enabled
kernels with old bootloaders.
This patch also adds the needed logic to genereate such an image
when building zImages or uImages, also adding the necessary parts
to rebuild the uImage.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'linux/Config.in')
| -rw-r--r-- | linux/Config.in | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/linux/Config.in b/linux/Config.in index 84fae910e..553aa3973 100644 --- a/linux/Config.in +++ b/linux/Config.in @@ -140,6 +140,13 @@ config BR2_LINUX_KERNEL_UIMAGE depends on BR2_arm || BR2_armeb || BR2_bfin || BR2_powerpc || BR2_avr32 || BR2_sh || BR2_sh64 select BR2_LINUX_KERNEL_UBOOT_IMAGE +config BR2_LINUX_KERNEL_APPENDED_UIMAGE + bool "uImage with appended DT" + depends on BR2_arm || BR2_armeb + select BR2_LINUX_KERNEL_DTS_SUPPORT + select BR2_LINUX_KERNEL_APPENDED_DTB + select BR2_LINUX_KERNEL_UBOOT_IMAGE + config BR2_LINUX_KERNEL_BZIMAGE bool "bzImage" depends on BR2_i386 || BR2_x86_64 @@ -148,6 +155,12 @@ config BR2_LINUX_KERNEL_ZIMAGE bool "zImage" depends on BR2_arm || BR2_armeb || BR2_powerpc || BR2_sparc || BR2_sh || BR2_sh64 || BR2_xtensa +config BR2_LINUX_KERNEL_APPENDED_ZIMAGE + bool "zImage with appended DT" + depends on BR2_arm || BR2_armeb + select BR2_LINUX_KERNEL_DTS_SUPPORT + select BR2_LINUX_KERNEL_APPENDED_DTB + config BR2_LINUX_KERNEL_VMLINUX_BIN bool "vmlinux.bin" depends on BR2_mips || BR2_mipsel || BR2_sh || BR2_sh64 @@ -187,6 +200,26 @@ config BR2_LINUX_KERNEL_DTS_SUPPORT if BR2_LINUX_KERNEL_DTS_SUPPORT +# We have mainly three cases when it comes to device tree support: +# 1) We don't want any support at all. Then the ..DTS_SUPPORT +# variable won't be set +# 2) We want device tree support, so we need the user to enter +# the device tree name or the the path to the custom device +# he uses, but the kernel abstracts this from us and only +# build an image that looks like a regular kernel image. In +# this case, we only need to derive the kernel image name from +# the given device tree name, and all the rest is as usual +# 3) We want device tree support, but the kernel requires us to +# build the device tree blob separately. In this case, some +# more logic will be needed. +# The variable below address the second case, were you only want +# limited actions from buildroot. +config BR2_LINUX_KERNEL_DTB_IS_SELF_BUILT + bool + +config BR2_LINUX_KERNEL_APPENDED_DTB + bool + choice prompt "Device tree source" default BR2_LINUX_KERNEL_USE_INTREE_DTS |