10 files changed, 20 insertions, 0 deletions
diff --git a/src/mainboard/system76/addw1/Makefile.inc b/src/mainboard/system76/addw1/Makefile.inc
index fedde68c13..09424595d7 100644
--- a/src/mainboard/system76/addw1/Makefile.inc
+++ b/src/mainboard/system76/addw1/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c
diff --git a/src/mainboard/system76/adl/Makefile.inc b/src/mainboard/system76/adl/Makefile.inc
index 9dea9f3b1f..c5334f1f0c 100644
--- a/src/mainboard/system76/adl/Makefile.inc
+++ b/src/mainboard/system76/adl/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c
diff --git a/src/mainboard/system76/bonw14/Makefile.inc b/src/mainboard/system76/bonw14/Makefile.inc
index a866021880..2efcac5f42 100644
--- a/src/mainboard/system76/bonw14/Makefile.inc
+++ b/src/mainboard/system76/bonw14/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c
diff --git a/src/mainboard/system76/cml-u/Makefile.inc b/src/mainboard/system76/cml-u/Makefile.inc
index 51ad54367e..921112cee9 100644
--- a/src/mainboard/system76/cml-u/Makefile.inc
+++ b/src/mainboard/system76/cml-u/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c
diff --git a/src/mainboard/system76/gaze15/Makefile.inc b/src/mainboard/system76/gaze15/Makefile.inc
index 32a409992f..72f13667d3 100644
--- a/src/mainboard/system76/gaze15/Makefile.inc
+++ b/src/mainboard/system76/gaze15/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c
diff --git a/src/mainboard/system76/kbl-u/Makefile.inc b/src/mainboard/system76/kbl-u/Makefile.inc
index d749e412cc..bf3828de96 100644
--- a/src/mainboard/system76/kbl-u/Makefile.inc
+++ b/src/mainboard/system76/kbl-u/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c
diff --git a/src/mainboard/system76/oryp5/Makefile.inc b/src/mainboard/system76/oryp5/Makefile.inc
index 7c0701e97c..e52cccafc8 100644
--- a/src/mainboard/system76/oryp5/Makefile.inc
+++ b/src/mainboard/system76/oryp5/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c
diff --git a/src/mainboard/system76/oryp6/Makefile.inc b/src/mainboard/system76/oryp6/Makefile.inc
index 2267eb6f9f..ab8e965d87 100644
--- a/src/mainboard/system76/oryp6/Makefile.inc
+++ b/src/mainboard/system76/oryp6/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c
diff --git a/src/mainboard/system76/tgl-u/Makefile.inc b/src/mainboard/system76/tgl-u/Makefile.inc
index ca14835be7..28ada02313 100644
--- a/src/mainboard/system76/tgl-u/Makefile.inc
+++ b/src/mainboard/system76/tgl-u/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 ifeq ($(CONFIG_BOARD_SYSTEM76_GALP5),y)
diff --git a/src/mainboard/system76/whl-u/Makefile.inc b/src/mainboard/system76/whl-u/Makefile.inc
index d749e412cc..bf3828de96 100644
--- a/src/mainboard/system76/whl-u/Makefile.inc
+++ b/src/mainboard/system76/whl-u/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 CPPFLAGS_common += -I$(src)/mainboard/$(MAINBOARDDIR)/include
 
 bootblock-y += bootblock.c