powerpc: Add "force config cmd line" Kconfig option

powerpc uses early_init_dt_scan_chosen() from common fdt code. By
enabling this option, the common code can take the built in
command line over the one that is comming from bootloader / DT.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 957bf344c0f5..957d3e5aff9e 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -618,6 +618,15 @@ config CMDLINE
           some command-line options at build time by entering them here.  In
           most cases you will need to specify the root device here.
 
+config CMDLINE_FORCE
+        bool "Always use the default kernel command string"
+        depends on CMDLINE_BOOL
+        help
+          Always use the default kernel command string, even if the boot
+          loader passes other arguments to the kernel.
+          This is useful if you cannot or don't want to change the
+          command-line options your boot loader passes to the kernel.
+
 config EXTRA_TARGETS
         string "Additional default image types"
         help