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path: root/drivers/tty/serial/serial_mctrl_gpio.h
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Diffstat (limited to 'drivers/tty/serial/serial_mctrl_gpio.h')
-rw-r--r--drivers/tty/serial/serial_mctrl_gpio.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h
index fa000bcff217..219eba0223bb 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.h
+++ b/drivers/tty/serial/serial_mctrl_gpio.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0+
/*
* Helpers for controlling modem lines via GPIO
*