6 files changed, 6 insertions, 0 deletions
diff --git a/drivers/staging/iio/Makefile b/drivers/staging/iio/Makefile
index 0cfd05d5bf49..455bffc29649 100644
--- a/drivers/staging/iio/Makefile
+++ b/drivers/staging/iio/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for the industrial I/O core.
 #
diff --git a/drivers/staging/iio/adc/Makefile b/drivers/staging/iio/adc/Makefile
index bf18bdd7c99d..ebe83c1ad362 100644
--- a/drivers/staging/iio/adc/Makefile
+++ b/drivers/staging/iio/adc/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for industrial I/O ADC drivers
 #
diff --git a/drivers/staging/iio/meter/Makefile b/drivers/staging/iio/meter/Makefile
index de3863d6b078..19e7982f5563 100644
--- a/drivers/staging/iio/meter/Makefile
+++ b/drivers/staging/iio/meter/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
 #
 # Makefile for metering ic drivers
 #
diff --git a/drivers/staging/iio/meter/ade7854.h b/drivers/staging/iio/meter/ade7854.h
index dbd97def9cd8..c27247a7891a 100644
--- a/drivers/staging/iio/meter/ade7854.h
+++ b/drivers/staging/iio/meter/ade7854.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _ADE7854_H
 #define _ADE7854_H
 
diff --git a/drivers/staging/iio/meter/meter.h b/drivers/staging/iio/meter/meter.h
index 0e37f23853f1..edf26302fa57 100644
--- a/drivers/staging/iio/meter/meter.h
+++ b/drivers/staging/iio/meter/meter.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _METER_H
 #define _METER_H
 
diff --git a/drivers/staging/iio/trigger/iio-trig-bfin-timer.h b/drivers/staging/iio/trigger/iio-trig-bfin-timer.h
index c07321f8d94c..fb05a2a8397c 100644
--- a/drivers/staging/iio/trigger/iio-trig-bfin-timer.h
+++ b/drivers/staging/iio/trigger/iio-trig-bfin-timer.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 #ifndef __IIO_BFIN_TIMER_TRIGGER_H__
 #define __IIO_BFIN_TIMER_TRIGGER_H__