[PATCH] checkpatch.pl: Report an error for CONFIG_xPL_BUILD in device trees

[Hendrik Donner]

The defines for the different build phases shouldn't be used in device
trees, currently they aren't even defined for device tree pre processing,
resulting in build errors.

Link: https://lists.denx.de/pipermail/u-boot/2025-March/582787.html
Signed-off-by: Hendrik Donner <hd at os-cillation.de>
---
 scripts/checkpatch.pl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index b8eb57f38c7..119916d4c78 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2692,6 +2692,12 @@ sub u_boot_line {
 		ERROR("PRE_SCHEMA",
 		      "Driver model schema uses 'bootph-...' tags now\n" . $herecurr);
 	}
+
+	# Do not allow CONFIG_xPL_BUILD in device trees
+	if ($realfile =~ /\.dtsi?$/ && $line =~ /^\+.*CONFIG_(X|S|T|V)PL_BUILD.*/) {
+		ERROR("CONFIG_xPL_BUILD",
+		      "Do not use CONFIG_xPL_BUILD in device trees\n" . $herecurr);
+	}
 }
 
 sub exclude_global_initialisers {
-- 
2.43.0