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authorScott Wood <scottwood@freescale.com>2007-04-17 09:24:51 +1000
committerPaul Mackerras <paulus@samba.org>2007-04-24 21:31:53 +1000
commit270429baa928fa6beff4042a7701944e23396417 (patch)
tree025a98f94e1fc721726c152118d305fcd55b805a /arch
parentb97d27914354619ec6883ffe08dbd9c8e4b826b7 (diff)
[POWERPC] bootwrapper: Add CONFIG_DEVICE_TREE
This provides a way to tell the bootwrapper makefile which device tree to include by default. The wrapper can still be invoked standalone to wrap with a different device tree without reconfiguring the kernel, if that is desired. The user will only be asked to provide a device tree if the platform selects CONFIG_WANT_DEVICE_TREE. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/Kconfig24
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 26713da1b52..9b9c00ee688 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -162,6 +162,7 @@ config PPC_83xx
select FSL_SOC
select 83xx
select PPC_FPU
+ select WANT_DEVICE_TREE
config PPC_85xx
bool "Freescale 85xx"
@@ -572,6 +573,29 @@ config SECCOMP
If unsure, say Y. Only embedded should say N here.
+config WANT_DEVICE_TREE
+ bool
+ default n
+
+config DEVICE_TREE
+ string "Static device tree source file"
+ depends on WANT_DEVICE_TREE
+ help
+ This specifies the device tree source (.dts) file to be
+ compiled and included when building the bootwrapper. If a
+ relative filename is given, then it will be relative to
+ arch/powerpc/boot/dts. If you are not using the bootwrapper,
+ or do not need to build a dts into the bootwrapper, this
+ field is ignored.
+
+ For example, this is required when building a cuImage target
+ for an older U-Boot, which cannot pass a device tree itself.
+ Such a kernel will not work with a newer U-Boot that tries to
+ pass a device tree (unless you tell it not to). If your U-Boot
+ does not mention a device tree in "help bootm", then use the
+ cuImage target and specify a device tree here. Otherwise, use
+ the uImage target and leave this field blank.
+
endmenu
config ISA_DMA_API