diff --git a/tools/firmware-utils/src/bcm_tag.h b/tools/firmware-utils/src/bcm_tag.h
index 2730edc9ad9..a0d560884f3 100644
--- a/tools/firmware-utils/src/bcm_tag.h
+++ b/tools/firmware-utils/src/bcm_tag.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #ifndef __BCM63XX_TAG_H
 #define __BCM63XX_TAG_H
 
diff --git a/tools/firmware-utils/src/bcmalgo.c b/tools/firmware-utils/src/bcmalgo.c
index c0865a183ba..fd6c1c116ed 100644
--- a/tools/firmware-utils/src/bcmalgo.c
+++ b/tools/firmware-utils/src/bcmalgo.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdlib.h>
 #include <sys/types.h>
 #include <stdio.h>
diff --git a/tools/firmware-utils/src/bcmalgo.h b/tools/firmware-utils/src/bcmalgo.h
index 46647cf6d3d..9aec7d19311 100644
--- a/tools/firmware-utils/src/bcmalgo.h
+++ b/tools/firmware-utils/src/bcmalgo.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #ifndef bcmutils_H
 #define bcmutils_H
 
diff --git a/tools/firmware-utils/src/dgfirmware.c b/tools/firmware-utils/src/dgfirmware.c
index 3ec4712ec93..c5549c82be8 100644
--- a/tools/firmware-utils/src/dgfirmware.c
+++ b/tools/firmware-utils/src/dgfirmware.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/tools/firmware-utils/src/hcsmakeimage.c b/tools/firmware-utils/src/hcsmakeimage.c
index 2888810cc7e..ce954cfcc93 100644
--- a/tools/firmware-utils/src/hcsmakeimage.c
+++ b/tools/firmware-utils/src/hcsmakeimage.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdlib.h>
 #include <sys/types.h>
 #include <stdio.h>
diff --git a/tools/firmware-utils/src/mkdapimg.c b/tools/firmware-utils/src/mkdapimg.c
index 0031d83dd08..e8b12599d82 100644
--- a/tools/firmware-utils/src/mkdapimg.c
+++ b/tools/firmware-utils/src/mkdapimg.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/tools/firmware-utils/src/mksercommfw.c b/tools/firmware-utils/src/mksercommfw.c
index f6f1d93f379..5fa323f2d55 100644
--- a/tools/firmware-utils/src/mksercommfw.c
+++ b/tools/firmware-utils/src/mksercommfw.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
diff --git a/tools/firmware-utils/src/mktitanimg.c b/tools/firmware-utils/src/mktitanimg.c
index acc21bd64d1..654a6bd09bd 100644
--- a/tools/firmware-utils/src/mktitanimg.c
+++ b/tools/firmware-utils/src/mktitanimg.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/tools/firmware-utils/src/mktitanimg.h b/tools/firmware-utils/src/mktitanimg.h
index 9ff30f6088a..27b37b3fdac 100644
--- a/tools/firmware-utils/src/mktitanimg.h
+++ b/tools/firmware-utils/src/mktitanimg.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #ifndef __MKTITANIMG_H
 #define __MKTITANIMG_H
 
diff --git a/tools/firmware-utils/src/srec2bin.c b/tools/firmware-utils/src/srec2bin.c
index 95a8195d1a5..ad4222d6939 100644
--- a/tools/firmware-utils/src/srec2bin.c
+++ b/tools/firmware-utils/src/srec2bin.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdio.h>
 #include <ctype.h>
 #include <string.h>
diff --git a/tools/firmware-utils/src/trx2edips.c b/tools/firmware-utils/src/trx2edips.c
index 14c4eb70ba9..e8ac14d8302 100644
--- a/tools/firmware-utils/src/trx2edips.c
+++ b/tools/firmware-utils/src/trx2edips.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdio.h>
 #include <stdlib.h>
 #include <stddef.h>
diff --git a/tools/firmware-utils/src/utils.h b/tools/firmware-utils/src/utils.h
index 11ec7400690..b051f5e6c75 100644
--- a/tools/firmware-utils/src/utils.h
+++ b/tools/firmware-utils/src/utils.h
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <stdint.h>
 #include <string.h>
 
diff --git a/tools/firmware-utils/src/wrt400n.c b/tools/firmware-utils/src/wrt400n.c
index 1cf1debc893..a6c1f8038bc 100644
--- a/tools/firmware-utils/src/wrt400n.c
+++ b/tools/firmware-utils/src/wrt400n.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * WRT400n - Firmware Generation Creator
  *