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Diffstat (limited to 'common/Kconfig.boot')
| -rw-r--r-- | common/Kconfig.boot | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/common/Kconfig.boot b/common/Kconfig.boot index 3f6d9c1a25..58e98548de 100644 --- a/common/Kconfig.boot +++ b/common/Kconfig.boot @@ -865,6 +865,23 @@ config BOOTARGS CONFIG_BOOTARGS goes into the environment value "bootargs". Note that this value will also override the "chosen" node in FDT blob. +config BOOTARGS_SUBST + bool "Support substituting strings in boot arguments" + help + This allows substituting string values in the boot arguments. These + are applied after the commandline has been built. + + One use for this is to insert the root-disk UUID into the command + line where bootargs contains "root=${uuid}" + + setenv bootargs "console= root=${uuid}" + # Set the 'uuid' environment variable + part uuid mmc 2:2 uuid + + # Command-line substitution will put the real uuid into the + # kernel command line + bootm + config USE_BOOTCOMMAND bool "Enable a default value for bootcmd" help |