cmd: fdt: skip board specific fixup using env variable
Sometimes it is useful to boot OS with already fixed-up
device tree. Check for env variable 'skip_board_fixup'
before calling ft_board_setup().
Current behaviour is unchanged, additionally user can
set skip_board_fixup to 1 to skip the fixup.
Signed-off-by: Wasim Khan <wasim.khan@nxp.com>
diff --git a/common/image-fdt.c b/common/image-fdt.c
index 61ce6e5..a287b66 100644
--- a/common/image-fdt.c
+++ b/common/image-fdt.c
@@ -576,11 +576,18 @@
fdt_fixup_pstore(blob);
#endif
if (IMAGE_OF_BOARD_SETUP) {
- fdt_ret = ft_board_setup(blob, gd->bd);
- if (fdt_ret) {
- printf("ERROR: board-specific fdt fixup failed: %s\n",
- fdt_strerror(fdt_ret));
- goto err;
+ const char *skip_board_fixup;
+
+ skip_board_fixup = env_get("skip_board_fixup");
+ if (skip_board_fixup && ((int)simple_strtol(skip_board_fixup, NULL, 10) == 1)) {
+ printf("skip board fdt fixup\n");
+ } else {
+ fdt_ret = ft_board_setup(blob, gd->bd);
+ if (fdt_ret) {
+ printf("ERROR: board-specific fdt fixup failed: %s\n",
+ fdt_strerror(fdt_ret));
+ goto err;
+ }
}
}
if (IMAGE_OF_SYSTEM_SETUP) {
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 01ab570..755f480 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2383,6 +2383,12 @@
"fdt or initrd relocation disabled at boot time\n" . $herecurr);
}
+ # make sure 'skip_board_fixup' is not
+ if ($rawline =~ /.*skip_board_fixup.*/) {
+ ERROR("SKIP_BOARD_FIXUP",
+ "Avoid setting skip_board_fixup env variable\n" . $herecurr);
+ }
+
# Do not use CONFIG_ prefix in CONFIG_IS_ENABLED() calls
if ($line =~ /^\+.*CONFIG_IS_ENABLED\(CONFIG_\w*\).*/) {
ERROR("CONFIG_IS_ENABLED_CONFIG",