[PATCH v2 2/6] Set DTSF_PLUGIN if needed when compiling from dtb

The need for the plugin flag is determined by the existence of __fixups__
or __local_fixups__.

This is a bit simplifying because if __fixups__ or __local_fixups__
exist but don't have properties, the plugin flag isn't needed. But in
practise the test should be good enough such that this corner case
doesn't matter.

Reviewed-by: David Gibson <[email protected]>
Signed-off-by: Uwe Kleine-König <[email protected]>
---
 flattree.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/flattree.c b/flattree.c
index 30e6de2044b2..f3b698c17e89 100644
--- a/flattree.c
+++ b/flattree.c
@@ -807,6 +807,7 @@ struct dt_info *dt_from_blob(const char *fname)
 	struct node *tree;
 	uint32_t val;
 	int flags = 0;
+	unsigned int dtsflags = DTSF_V1;
 
 	f = srcfile_relative_open(fname, NULL);
 
@@ -919,5 +920,8 @@ struct dt_info *dt_from_blob(const char *fname)
 
 	fclose(f);
 
-	return build_dt_info(DTSF_V1, reservelist, tree, boot_cpuid_phys);
+	if (get_subnode(tree, "__fixups__") || get_subnode(tree, "__local_fixups__"))
+		dtsflags |= DTSF_PLUGIN;
+
+	return build_dt_info(dtsflags, reservelist, tree, boot_cpuid_phys);
 }
-- 
2.51.0