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-rw-r--r--arch/arm/Kconfig11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 66b7d1e0957..166bd2a5e9f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1735,6 +1735,17 @@ config ARM_APPENDED_DTB
(dtb) appended to zImage
(e.g. cat zImage <filename>.dtb > zImage_w_dtb).
+config ARM_ATAG_DTB_COMPAT
+ bool "Supplement the appended DTB with traditional ATAG information"
+ depends on ARM_APPENDED_DTB
+ help
+ Some old bootloaders can't be updated to a DTB capable one, yet
+ they provide ATAGs with memory configuration, the ramdisk address,
+ the kernel cmdline string, etc. To allow a device tree enabled
+ kernel to be used with such bootloaders, this option allows
+ zImage to extract the information from the ATAG list and store it
+ at run time into the appended DTB.
+
config CMDLINE
string "Default kernel command string"
default ""