[PATCH] scripts: dtc: fix a false alarm for node_name_chars_strict

[Qun-Wei Lin]

The function check_node_name_chars_strict issues a false alarm when
compiling an overlay dts.

/fragment@0/__overlay__: Character '_' not recommended in node name

This workaround will fix it by skip checking for node named __overlay__.

Signed-off-by: Qun-Wei Lin <qun-wei.lin@xxxxxxxxxxxx>
---
 scripts/dtc/checks.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index 781ba1129a8e..6ef4f2cd67b9 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -325,6 +325,11 @@ static void check_node_name_chars_strict(struct check *c, struct dt_info *dti,
 {
 	int n = strspn(node->name, c->data);
 
+	if (streq(node->name, "__overlay__")) {
+		/* HACK: Overlay fragments are a special case */
+		return;
+	}
+
 	if (n < node->basenamelen)
 		FAIL(c, dti, node, "Character '%c' not recommended in node name",
 		     node->name[n]);
-- 
2.18.0