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-rw-r--r--include/gpio.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/gpio.h b/include/gpio.h
index 0c0c0337e0..98c5b93ba2 100644
--- a/include/gpio.h
+++ b/include/gpio.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __GPIO_H
#define __GPIO_H