sh: Allow for kernel command line concatenation.
So far kernel command line arguments could be passed in by a bootloader
or defined as CONFIG_CMDLINE, which completely overwriting the first one.
This change allows a developer to declare selected kernel parameters in
a kernel configuration (eg. project-specific defconfig), retaining
possibility of passing others by a bootloader.
The obvious examples of the first type are MTD partition or
bigphysarea-like region definitions, while "debug" option or network
configuration should be given by a bootloader or a JTAG boot script.
Signed-off-by: Pawel Moll <pawel.moll@st.com>
Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 80b4f9a..2f5352c 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -767,12 +767,31 @@
If unsure, say N.
-config CMDLINE_BOOL
- bool "Default bootloader kernel arguments"
+choice
+ prompt "Kernel command line"
+ optional
+ default CMDLINE_OVERWRITE
+ help
+ Setting this option allows the kernel command line arguments
+ to be set.
+
+config CMDLINE_OVERWRITE
+ bool "Overwrite bootloader kernel arguments"
+ help
+ Given string will overwrite any arguments passed in by
+ a bootloader.
+
+config CMDLINE_EXTEND
+ bool "Extend bootloader kernel arguments"
+ help
+ Given string will be concatenated with arguments passed in
+ by a bootloader.
+
+endchoice
config CMDLINE
- string "Initial kernel command string"
- depends on CMDLINE_BOOL
+ string "Kernel command line arguments string"
+ depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
default "console=ttySC1,115200"
endmenu