linux-kernel - [RFC PATCH 34/77] dtc: Add import symbols (/import/ keyword) in generated dts file

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Message-ID: <20260112142009.1006236-35-herve.codina@bootlin.com>
Date: Mon, 12 Jan 2026 15:19:24 +0100
From: Herve Codina <herve.codina@...tlin.com>
To: David Gibson <david@...son.dropbear.id.au>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>
Cc: Ayush Singh <ayush@...gleboard.org>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	devicetree-compiler@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	devicetree-spec@...r.kernel.org,
	Hui Pu <hui.pu@...ealthcare.com>,
	Ian Ray <ian.ray@...ealthcare.com>,
	Luca Ceresoli <luca.ceresoli@...tlin.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	Herve Codina <herve.codina@...tlin.com>
Subject: [RFC PATCH 34/77] dtc: Add import symbols (/import/ keyword) in generated dts file

The import symbols (/import/ keyword) parsing from a dts file is
supported.

Add the support for this keyword in the dts file generation.

Signed-off-by: Herve Codina <herve.codina@...tlin.com>
---
 treesource.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/treesource.c b/treesource.c
index 9effe38..04f65bb 100644
--- a/treesource.c
+++ b/treesource.c
@@ -381,6 +381,7 @@ static void write_tree_source_node(FILE *f, struct node *tree, int level)
 void dt_to_source(FILE *f, struct dt_info *dti)
 {
 	struct reserve_info *re;
+	struct symbol *importsym;
 
 	fprintf(f, "/dts-v1/;\n");
 	if (dti->dtsflags & DTSF_ADDON)
@@ -397,5 +398,14 @@ void dt_to_source(FILE *f, struct dt_info *dti)
 			(unsigned long long)re->size);
 	}
 
+	if (dti->importsymlist) {
+		for_each_symbol(dti->importsymlist, importsym) {
+			fprintf(f, "/import/ %s: \"%s\";\n",
+				importsym->name,
+				importsym->compatible);
+		}
+		fprintf(f, "\n");
+	}
+
 	write_tree_source_node(f, dti->dt, 0);
 }
-- 
2.52.0