diff --git a/drivers/iio/accel/cros_ec_accel_legacy.c b/drivers/iio/accel/cros_ec_accel_legacy.c
index 063e89eff791..e7350ddec328 100644
--- a/drivers/iio/accel/cros_ec_accel_legacy.c
+++ b/drivers/iio/accel/cros_ec_accel_legacy.c
@@ -1,21 +1,8 @@
-/*
- * Driver for older Chrome OS EC accelerometer
- *
- * Copyright 2017 Google, Inc
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * This driver uses the memory mapper cros-ec interface to communicate
- * with the Chrome OS EC about accelerometer data.
- * Accelerometer access is presented through iio sysfs.
- */
+// SPDX-License-Identifier: GPL-2.0+
+// Driver for older Chrome OS EC accelerometer
+//
+// Copyright (C) 2017 Google, Inc.
+// Author: Gwendal Grignou <gwendal@chromium.org>
 
 #include <linux/delay.h>
 #include <linux/device.h>
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
index 705cb3e72663..3dbc90baf6bb 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
@@ -1,20 +1,10 @@
-/*
- * cros_ec_sensors - Driver for Chrome OS Embedded Controller sensors.
- *
- * Copyright (C) 2016 Google, Inc
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * This driver uses the cros-ec interface to communicate with the Chrome OS
- * EC about sensors data. Data access is presented through iio sysfs.
- */
+// SPDX-License-Identifier: GPL-2.0
+// Driver for Chrome OS Embedded Controller sensors.
+//
+// Copyright (C) 2016 Google, Inc.
+//
+// This driver uses the cros-ec interface to communicate with the ChromeOS
+// EC about sensors data. Data access is presented through iio sysfs.
 
 #include <linux/delay.h>
 #include <linux/device.h>
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
index a620eb5ce202..05221994197c 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
@@ -1,17 +1,7 @@
-/*
- * cros_ec_sensors_core - Common function for Chrome OS EC sensor driver.
- *
- * Copyright (C) 2016 Google, Inc
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
+// SPDX-License-Identifier: GPL-2.0
+// Common functions for ChromeOS EC sensor driver.
+//
+// Copyright (C) 2016 Google, Inc.
 
 #include <linux/delay.h>
 #include <linux/device.h>
diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.h b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.h
index 2edf68dc7336..a9935489030e 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.h
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.h
@@ -1,16 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0 */
 /*
  * ChromeOS EC sensor hub
  *
- * Copyright (C) 2016 Google, Inc
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
+ * Copyright (C) 2016 Google, Inc.
  */
 
 #ifndef __CROS_EC_SENSORS_CORE_H
diff --git a/drivers/iio/light/cros_ec_light_prox.c b/drivers/iio/light/cros_ec_light_prox.c
index 8e8a0e7f78d1..8635e1c18cd5 100644
--- a/drivers/iio/light/cros_ec_light_prox.c
+++ b/drivers/iio/light/cros_ec_light_prox.c
@@ -1,17 +1,7 @@
-/*
- * cros_ec_light_prox - Driver for light and prox sensors behing CrosEC.
- *
- * Copyright (C) 2017 Google, Inc
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
+// SPDX-License-Identifier: GPL-2.0
+// Driver for light and prox sensors behind ChromeOS EC.
+//
+// Copyright (C) 2017 Google, Inc.
 
 #include <linux/delay.h>
 #include <linux/device.h>
diff --git a/drivers/iio/pressure/cros_ec_baro.c b/drivers/iio/pressure/cros_ec_baro.c
index 4599fde4dd25..8e134d65d18d 100644
--- a/drivers/iio/pressure/cros_ec_baro.c
+++ b/drivers/iio/pressure/cros_ec_baro.c
@@ -1,17 +1,7 @@
-/*
- * cros_ec_baro - Driver for barometer sensor behind CrosEC.
- *
- * Copyright (C) 2017 Google, Inc
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
+// SPDX-License-Identifier: GPL-2.0
+// Driver for barometer sensor behind ChromeOS EC.
+//
+// Copyright (C) 2017 Google, Inc.
 
 #include <linux/delay.h>
 #include <linux/device.h>
