diff --git a/drivers/staging/most/aim-cdev/cdev.c b/drivers/staging/most/aim-cdev/cdev.c
index 1e5cbc893496..d6e7e85d9ece 100644
--- a/drivers/staging/most/aim-cdev/cdev.c
+++ b/drivers/staging/most/aim-cdev/cdev.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * cdev.c - Application interfacing module for character devices
  *
diff --git a/drivers/staging/most/aim-network/networking.c b/drivers/staging/most/aim-network/networking.c
index 936f013c350e..e2dff6d5cf30 100644
--- a/drivers/staging/most/aim-network/networking.c
+++ b/drivers/staging/most/aim-network/networking.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Networking AIM - Networking Application Interface Module for MostCore
  *
diff --git a/drivers/staging/most/aim-sound/sound.c b/drivers/staging/most/aim-sound/sound.c
index ea1366a44008..0f596ca532d8 100644
--- a/drivers/staging/most/aim-sound/sound.c
+++ b/drivers/staging/most/aim-sound/sound.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * sound.c - Audio Application Interface Module for Mostcore
  *
diff --git a/drivers/staging/most/aim-v4l2/video.c b/drivers/staging/most/aim-v4l2/video.c
index e0748416aee5..e089d139b943 100644
--- a/drivers/staging/most/aim-v4l2/video.c
+++ b/drivers/staging/most/aim-v4l2/video.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * V4L2 AIM - V4L2 Application Interface Module for MostCore
  *
diff --git a/drivers/staging/most/hdm-dim2/dim2_errors.h b/drivers/staging/most/hdm-dim2/dim2_errors.h
index 66343ba426c1..073d93cf4927 100644
--- a/drivers/staging/most/hdm-dim2/dim2_errors.h
+++ b/drivers/staging/most/hdm-dim2/dim2_errors.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dim2_errors.h - Definitions of errors for DIM2 HAL API
  * (MediaLB, Device Interface Macro IP, OS62420)
diff --git a/drivers/staging/most/hdm-dim2/dim2_hal.c b/drivers/staging/most/hdm-dim2/dim2_hal.c
index 91484643d289..f0a45863c8cb 100644
--- a/drivers/staging/most/hdm-dim2/dim2_hal.c
+++ b/drivers/staging/most/hdm-dim2/dim2_hal.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dim2_hal.c - DIM2 HAL implementation
  * (MediaLB, Device Interface Macro IP, OS62420)
diff --git a/drivers/staging/most/hdm-dim2/dim2_hal.h b/drivers/staging/most/hdm-dim2/dim2_hal.h
index 6df6ea5f7da4..df678124117c 100644
--- a/drivers/staging/most/hdm-dim2/dim2_hal.h
+++ b/drivers/staging/most/hdm-dim2/dim2_hal.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dim2_hal.h - DIM2 HAL interface
  * (MediaLB, Device Interface Macro IP, OS62420)
diff --git a/drivers/staging/most/hdm-dim2/dim2_hdm.c b/drivers/staging/most/hdm-dim2/dim2_hdm.c
index df7021c522b3..c59c8a526d06 100644
--- a/drivers/staging/most/hdm-dim2/dim2_hdm.c
+++ b/drivers/staging/most/hdm-dim2/dim2_hdm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dim2_hdm.c - MediaLB DIM2 Hardware Dependent Module
  *
diff --git a/drivers/staging/most/hdm-dim2/dim2_hdm.h b/drivers/staging/most/hdm-dim2/dim2_hdm.h
index 4050e7c764ed..dc0293a7be1f 100644
--- a/drivers/staging/most/hdm-dim2/dim2_hdm.h
+++ b/drivers/staging/most/hdm-dim2/dim2_hdm.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dim2_hdm.h - MediaLB DIM2 HDM Header
  *
diff --git a/drivers/staging/most/hdm-dim2/dim2_reg.h b/drivers/staging/most/hdm-dim2/dim2_reg.h
index f7d9fbcd29f2..c94220daec33 100644
--- a/drivers/staging/most/hdm-dim2/dim2_reg.h
+++ b/drivers/staging/most/hdm-dim2/dim2_reg.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dim2_reg.h - Definitions for registers of DIM2
  * (MediaLB, Device Interface Macro IP, OS62420)
diff --git a/drivers/staging/most/hdm-dim2/dim2_sysfs.c b/drivers/staging/most/hdm-dim2/dim2_sysfs.c
index d8b22f91d2c3..144ab4281e31 100644
--- a/drivers/staging/most/hdm-dim2/dim2_sysfs.c
+++ b/drivers/staging/most/hdm-dim2/dim2_sysfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dim2_sysfs.c - MediaLB sysfs information
  *
diff --git a/drivers/staging/most/hdm-dim2/dim2_sysfs.h b/drivers/staging/most/hdm-dim2/dim2_sysfs.h
index b71dd027ebc7..50d17176a1b8 100644
--- a/drivers/staging/most/hdm-dim2/dim2_sysfs.h
+++ b/drivers/staging/most/hdm-dim2/dim2_sysfs.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * dim2_sysfs.h - MediaLB sysfs information
  *
diff --git a/drivers/staging/most/hdm-i2c/hdm_i2c.c b/drivers/staging/most/hdm-i2c/hdm_i2c.c
index 2b4de404e46a..6272353dc8c3 100644
--- a/drivers/staging/most/hdm-i2c/hdm_i2c.c
+++ b/drivers/staging/most/hdm-i2c/hdm_i2c.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * hdm_i2c.c - Hardware Dependent Module for I2C Interface
  *
diff --git a/drivers/staging/most/hdm-usb/hdm_usb.c b/drivers/staging/most/hdm-usb/hdm_usb.c
index 667dacac81f0..368e0718bd6e 100644
--- a/drivers/staging/most/hdm-usb/hdm_usb.c
+++ b/drivers/staging/most/hdm-usb/hdm_usb.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * hdm_usb.c - Hardware dependent module for USB
  *
diff --git a/drivers/staging/most/mostcore/core.c b/drivers/staging/most/mostcore/core.c
index 069269db394c..80040849160d 100644
--- a/drivers/staging/most/mostcore/core.c
+++ b/drivers/staging/most/mostcore/core.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * core.c - Implementation of core module of MOST Linux driver stack
  *
diff --git a/drivers/staging/most/mostcore/mostcore.h b/drivers/staging/most/mostcore/mostcore.h
index 915e5159d1eb..6f15590417f5 100644
--- a/drivers/staging/most/mostcore/mostcore.h
+++ b/drivers/staging/most/mostcore/mostcore.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * mostcore.h - Interface between MostCore,
  *   Hardware Dependent Module (HDM) and Application Interface Module (AIM).