src/mainboard: Replace GPLv2 long form headers with SPDX header

Change-Id: I64d9468682a4aae3084b17b8724d035f17d01dff
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41187
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

60 files changed, 60 insertions, 766 deletions

diff --git a/src/mainboard/asrock/b75pro3-m/devicetree.cb b/src/mainboard/asrock/b75pro3-m/devicetree.cb
index 50033b3b27..c2bc35a0fd 100644
--- a/src/mainboard/asrock/b75pro3-m/devicetree.cb
+++ b/src/mainboard/asrock/b75pro3-m/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	register "gfx.use_spread_spectrum_clock" = "0"
diff --git a/src/mainboard/asrock/b85m_pro4/Kconfig b/src/mainboard/asrock/b85m_pro4/Kconfig
index 91ae3a5b24..a02729f0f7 100644
--- a/src/mainboard/asrock/b85m_pro4/Kconfig
+++ b/src/mainboard/asrock/b85m_pro4/Kconfig
@@ -1,18 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-## Copyright (C) 2018 Tristan Corrick <tristan@corrick.kiwi>
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 if BOARD_ASROCK_B85M_PRO4
 
diff --git a/src/mainboard/asrock/b85m_pro4/gma-mainboard.ads b/src/mainboard/asrock/b85m_pro4/gma-mainboard.ads
index c595ad4c84..aea1a78780 100644
--- a/src/mainboard/asrock/b85m_pro4/gma-mainboard.ads
+++ b/src/mainboard/asrock/b85m_pro4/gma-mainboard.ads
@@ -1,17 +1,5 @@
---
 -- This file is part of the coreboot project.
---
--- Copyright (C) 2018 Angel Pons <th3fanbus@gmail.com>
---
--- This program is free software; you can redistribute it and/or modify
--- it under the terms of the GNU General Public License as published by
--- the Free Software Foundation; version 2 of the License.
---
--- 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-only
 
 with HW.GFX.GMA;
 with HW.GFX.GMA.Display_Probing;
diff --git a/src/mainboard/asrock/g41c-gs/variants/g41c-gs-r2/devicetree.cb b/src/mainboard/asrock/g41c-gs/variants/g41c-gs-r2/devicetree.cb
index fd73fb30ed..211797751d 100644
--- a/src/mainboard/asrock/g41c-gs/variants/g41c-gs-r2/devicetree.cb
+++ b/src/mainboard/asrock/g41c-gs/variants/g41c-gs-r2/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asrock/g41c-gs/variants/g41c-gs/devicetree.cb b/src/mainboard/asrock/g41c-gs/variants/g41c-gs/devicetree.cb
index 112cce0352..d8ee370ac0 100644
--- a/src/mainboard/asrock/g41c-gs/variants/g41c-gs/devicetree.cb
+++ b/src/mainboard/asrock/g41c-gs/variants/g41c-gs/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asrock/g41c-gs/variants/g41m-gs/devicetree.cb b/src/mainboard/asrock/g41c-gs/variants/g41m-gs/devicetree.cb
index 1af0c1c7f9..78c43f0b56 100644
--- a/src/mainboard/asrock/g41c-gs/variants/g41m-gs/devicetree.cb
+++ b/src/mainboard/asrock/g41c-gs/variants/g41m-gs/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asrock/g41c-gs/variants/g41m-s3/devicetree.cb b/src/mainboard/asrock/g41c-gs/variants/g41m-s3/devicetree.cb
index 42d2a97c02..a1ff256ad2 100644
--- a/src/mainboard/asrock/g41c-gs/variants/g41m-s3/devicetree.cb
+++ b/src/mainboard/asrock/g41c-gs/variants/g41m-s3/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asrock/g41c-gs/variants/g41m-vs3-r2/devicetree.cb b/src/mainboard/asrock/g41c-gs/variants/g41m-vs3-r2/devicetree.cb
index 5753057074..345030e5fc 100644
--- a/src/mainboard/asrock/g41c-gs/variants/g41m-vs3-r2/devicetree.cb
+++ b/src/mainboard/asrock/g41c-gs/variants/g41m-vs3-r2/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asrock/h81m-hds/Kconfig b/src/mainboard/asrock/h81m-hds/Kconfig
index dd26464e2d..b0ae030d24 100644
--- a/src/mainboard/asrock/h81m-hds/Kconfig
+++ b/src/mainboard/asrock/h81m-hds/Kconfig
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 if BOARD_ASROCK_H81M_HDS
 
diff --git a/src/mainboard/asrock/h81m-hds/Makefile.inc b/src/mainboard/asrock/h81m-hds/Makefile.inc
index 45798d3b9f..d839e2f720 100644
--- a/src/mainboard/asrock/h81m-hds/Makefile.inc
+++ b/src/mainboard/asrock/h81m-hds/Makefile.inc
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 romstage-y += gpio.c
 ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
diff --git a/src/mainboard/asrock/h81m-hds/devicetree.cb b/src/mainboard/asrock/h81m-hds/devicetree.cb
index 5be3791f18..84332e5821 100644
--- a/src/mainboard/asrock/h81m-hds/devicetree.cb
+++ b/src/mainboard/asrock/h81m-hds/devicetree.cb
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 chip northbridge/intel/haswell
 	register "gpu_ddi_e_connected" = "1"
diff --git a/src/mainboard/asus/h61m-cs/devicetree.cb b/src/mainboard/asus/h61m-cs/devicetree.cb
index 57ec653c0e..bc7994142b 100644
--- a/src/mainboard/asus/h61m-cs/devicetree.cb
+++ b/src/mainboard/asus/h61m-cs/devicetree.cb
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 chip northbridge/intel/sandybridge
 	device cpu_cluster 0x0 on
diff --git a/src/mainboard/asus/maximus_iv_gene-z/Kconfig b/src/mainboard/asus/maximus_iv_gene-z/Kconfig
index da2e48e14f..ec0e4cd552 100644
--- a/src/mainboard/asus/maximus_iv_gene-z/Kconfig
+++ b/src/mainboard/asus/maximus_iv_gene-z/Kconfig
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 if BOARD_ASUS_MAXIMUS_IV_GENE_Z
 
diff --git a/src/mainboard/asus/maximus_iv_gene-z/Makefile.inc b/src/mainboard/asus/maximus_iv_gene-z/Makefile.inc
index 85cc888553..f0944adb24 100644
--- a/src/mainboard/asus/maximus_iv_gene-z/Makefile.inc
+++ b/src/mainboard/asus/maximus_iv_gene-z/Makefile.inc
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 bootblock-y += gpio.c
 romstage-y += gpio.c
diff --git a/src/mainboard/asus/maximus_iv_gene-z/devicetree.cb b/src/mainboard/asus/maximus_iv_gene-z/devicetree.cb
index 7a5f348036..a07733e04a 100644
--- a/src/mainboard/asus/maximus_iv_gene-z/devicetree.cb
+++ b/src/mainboard/asus/maximus_iv_gene-z/devicetree.cb
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 chip northbridge/intel/sandybridge
 	device cpu_cluster 0 on
diff --git a/src/mainboard/asus/p5qc/variants/p5q/devicetree.cb b/src/mainboard/asus/p5qc/variants/p5q/devicetree.cb
index 9899468212..e1d4a0d465 100644
--- a/src/mainboard/asus/p5qc/variants/p5q/devicetree.cb
+++ b/src/mainboard/asus/p5qc/variants/p5q/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asus/p5qc/variants/p5q_pro/devicetree.cb b/src/mainboard/asus/p5qc/variants/p5q_pro/devicetree.cb
index c384795c69..bce1409d18 100644
--- a/src/mainboard/asus/p5qc/variants/p5q_pro/devicetree.cb
+++ b/src/mainboard/asus/p5qc/variants/p5q_pro/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asus/p5qc/variants/p5qc/devicetree.cb b/src/mainboard/asus/p5qc/variants/p5qc/devicetree.cb
index a129500fce..0fd9525074 100644
--- a/src/mainboard/asus/p5qc/variants/p5qc/devicetree.cb
+++ b/src/mainboard/asus/p5qc/variants/p5qc/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asus/p5qc/variants/p5ql_pro/devicetree.cb b/src/mainboard/asus/p5qc/variants/p5ql_pro/devicetree.cb
index 633ca8141a..4ed2e75753 100644
--- a/src/mainboard/asus/p5qc/variants/p5ql_pro/devicetree.cb
+++ b/src/mainboard/asus/p5qc/variants/p5ql_pro/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asus/p5ql-em/devicetree.cb b/src/mainboard/asus/p5ql-em/devicetree.cb
index ab9860b16a..578bb03e9e 100644
--- a/src/mainboard/asus/p5ql-em/devicetree.cb
+++ b/src/mainboard/asus/p5ql-em/devicetree.cb
@@ -1,16 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asus/p5qpl-am/devicetree.cb b/src/mainboard/asus/p5qpl-am/devicetree.cb
index efecc58458..7001123dcb 100644
--- a/src/mainboard/asus/p5qpl-am/devicetree.cb
+++ b/src/mainboard/asus/p5qpl-am/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/asus/p5qpl-am/variants/p5g41t-m_lx/overridetree.cb b/src/mainboard/asus/p5qpl-am/variants/p5g41t-m_lx/overridetree.cb
index f85ed1d2ec..aeebb3e97a 100644
--- a/src/mainboard/asus/p5qpl-am/variants/p5g41t-m_lx/overridetree.cb
+++ b/src/mainboard/asus/p5qpl-am/variants/p5g41t-m_lx/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device domain 0 on		# PCI domain
diff --git a/src/mainboard/asus/p5qpl-am/variants/p5qpl-am/overridetree.cb b/src/mainboard/asus/p5qpl-am/variants/p5qpl-am/overridetree.cb
index 2f00e1f028..5626aa1136 100644
--- a/src/mainboard/asus/p5qpl-am/variants/p5qpl-am/overridetree.cb
+++ b/src/mainboard/asus/p5qpl-am/variants/p5qpl-am/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device domain 0 on		# PCI domain
diff --git a/src/mainboard/asus/p8h61-m_lx/Kconfig b/src/mainboard/asus/p8h61-m_lx/Kconfig
index 54ba360d06..5665159d38 100644
--- a/src/mainboard/asus/p8h61-m_lx/Kconfig
+++ b/src/mainboard/asus/p8h61-m_lx/Kconfig
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 if BOARD_ASUS_P8H61_M_LX
 
diff --git a/src/mainboard/asus/p8h61-m_lx/Makefile.inc b/src/mainboard/asus/p8h61-m_lx/Makefile.inc
index 85cc888553..f0944adb24 100644
--- a/src/mainboard/asus/p8h61-m_lx/Makefile.inc
+++ b/src/mainboard/asus/p8h61-m_lx/Makefile.inc
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 bootblock-y += gpio.c
 romstage-y += gpio.c
diff --git a/src/mainboard/asus/p8h61-m_lx/devicetree.cb b/src/mainboard/asus/p8h61-m_lx/devicetree.cb
index 777c9d1981..87b4ce837d 100644
--- a/src/mainboard/asus/p8h61-m_lx/devicetree.cb
+++ b/src/mainboard/asus/p8h61-m_lx/devicetree.cb
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 chip northbridge/intel/sandybridge
 	device cpu_cluster 0 on
diff --git a/src/mainboard/asus/p8z77-m_pro/Makefile.inc b/src/mainboard/asus/p8z77-m_pro/Makefile.inc
index d989b7d22d..4eefe8d7e8 100644
--- a/src/mainboard/asus/p8z77-m_pro/Makefile.inc
+++ b/src/mainboard/asus/p8z77-m_pro/Makefile.inc
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 bootblock-y += gpio.c
 romstage-y += gpio.c
diff --git a/src/mainboard/emulation/qemu-i440fx/dsdt.asl b/src/mainboard/emulation/qemu-i440fx/dsdt.asl
index c4ca0b3013..8621a0a814 100644
--- a/src/mainboard/emulation/qemu-i440fx/dsdt.asl
+++ b/src/mainboard/emulation/qemu-i440fx/dsdt.asl
@@ -1,14 +1,5 @@
 /* Bochs/QEMU ACPI DSDT ASL definition */
-/*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This library 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
- * Lesser General Public License for more details.
- */
+/* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <acpi/acpi.h>
 DefinitionBlock (
diff --git a/src/mainboard/emulation/qemu-q35/dsdt.asl b/src/mainboard/emulation/qemu-q35/dsdt.asl
index 31a26603c2..1b4a174e6b 100644
--- a/src/mainboard/emulation/qemu-q35/dsdt.asl
+++ b/src/mainboard/emulation/qemu-q35/dsdt.asl
@@ -1,14 +1,5 @@
 /* Bochs/QEMU ACPI DSDT ASL definition */
-/*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This library 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
- * Lesser General Public License for more details.
- */
+/* SPDX-License-Identifier: GPL-2.0-only */
 
 /*
  * Based on acpi-dsdt.dsl, but heavily modified for q35 chipset.
diff --git a/src/mainboard/foxconn/d41s/devicetree.cb b/src/mainboard/foxconn/d41s/devicetree.cb
index 7594f489a4..52e1e63e5e 100644
--- a/src/mainboard/foxconn/d41s/devicetree.cb
+++ b/src/mainboard/foxconn/d41s/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/pineview		# Northbridge
 	register "gfx.use_spread_spectrum_clock" = "0"
diff --git a/src/mainboard/foxconn/g41s-k/devicetree.cb b/src/mainboard/foxconn/g41s-k/devicetree.cb
index dfc1534997..7369f53982 100644
--- a/src/mainboard/foxconn/g41s-k/devicetree.cb
+++ b/src/mainboard/foxconn/g41s-k/devicetree.cb
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/gigabyte/ga-g41m-es2l/devicetree.cb b/src/mainboard/gigabyte/ga-g41m-es2l/devicetree.cb
index cd535058d9..068ecd64ed 100644
--- a/src/mainboard/gigabyte/ga-g41m-es2l/devicetree.cb
+++ b/src/mainboard/gigabyte/ga-g41m-es2l/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/google/cheza/chromeos.fmd b/src/mainboard/google/cheza/chromeos.fmd
index 429fa124db..647315e17d 100644
--- a/src/mainboard/google/cheza/chromeos.fmd
+++ b/src/mainboard/google/cheza/chromeos.fmd
@@ -1,16 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License version 2 and
-## only version 2 as published by the Free Software Foundation.
-##
-## 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-only
 
 FLASH@0x0 8M {
 	WP_RO 4M {
diff --git a/src/mainboard/google/cheza/devicetree.cb b/src/mainboard/google/cheza/devicetree.cb
index 0e5ca5eaa6..bb71076439 100644
--- a/src/mainboard/google/cheza/devicetree.cb
+++ b/src/mainboard/google/cheza/devicetree.cb
@@ -1,16 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License version 2 and
-## only version 2 as published by the Free Software Foundation.
-##
-## 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-only
 
 chip soc/qualcomm/sdm845
 	device cpu_cluster 0 on end
diff --git a/src/mainboard/google/kahlee/variants/careena/include/variant/sku.h b/src/mainboard/google/kahlee/variants/careena/include/variant/sku.h
index bbe3eaaab4..c450b0f870 100644
--- a/src/mainboard/google/kahlee/variants/careena/include/variant/sku.h
+++ b/src/mainboard/google/kahlee/variants/careena/include/variant/sku.h
@@ -1,16 +1,5 @@
 /* This file is part of the coreboot project. */
-/*
- * Copyright (C) 2017 Google Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * 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-only */
 
 /* SKU ID enumeration */
 enum careena_sku {
diff --git a/src/mainboard/google/kahlee/variants/careena/variant.c b/src/mainboard/google/kahlee/variants/careena/variant.c
index 7eda9337ba..e0bd5d170c 100644
--- a/src/mainboard/google/kahlee/variants/careena/variant.c
+++ b/src/mainboard/google/kahlee/variants/careena/variant.c
@@ -1,16 +1,5 @@
 /* This file is part of the coreboot project. */
-/*
- * Copyright 2020 Google LLC
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * 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-only */
 
 #include <ec/google/chromeec/ec.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/mistral/chromeos.fmd b/src/mainboard/google/mistral/chromeos.fmd
index 44a463b749..1a60feb05d 100644
--- a/src/mainboard/google/mistral/chromeos.fmd
+++ b/src/mainboard/google/mistral/chromeos.fmd
@@ -1,16 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License version 2 and
-## only version 2 as published by the Free Software Foundation.
-##
-## 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-only
 
 FLASH@0x0 8M {
 	WP_RO 4M {
diff --git a/src/mainboard/google/mistral/devicetree.cb b/src/mainboard/google/mistral/devicetree.cb
index 337a20ec8c..fe1fd76463 100644
--- a/src/mainboard/google/mistral/devicetree.cb
+++ b/src/mainboard/google/mistral/devicetree.cb
@@ -1,16 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License version 2 and
-## only version 2 as published by the Free Software Foundation.
-##
-## 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-only
 
 chip soc/qualcomm/qcs405
 	device cpu_cluster 0 on end
diff --git a/src/mainboard/google/trogdor/chromeos.fmd b/src/mainboard/google/trogdor/chromeos.fmd
index 383d3acae8..fcf75ee5a7 100644
--- a/src/mainboard/google/trogdor/chromeos.fmd
+++ b/src/mainboard/google/trogdor/chromeos.fmd
@@ -1,16 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License version 2 and
-## only version 2 as published by the Free Software Foundation.
-##
-## 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-only
 
 FLASH@0x0 8M {
 	WP_RO 4M {
diff --git a/src/mainboard/google/trogdor/devicetree.cb b/src/mainboard/google/trogdor/devicetree.cb
index 3720374155..09cfbbc3a0 100644
--- a/src/mainboard/google/trogdor/devicetree.cb
+++ b/src/mainboard/google/trogdor/devicetree.cb
@@ -1,16 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License version 2 and
-## only version 2 as published by the Free Software Foundation.
-##
-## 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-only
 
 chip soc/qualcomm/sc7180
 	device cpu_cluster 0 on end
diff --git a/src/mainboard/hp/snb_ivb_laptops/devicetree.cb b/src/mainboard/hp/snb_ivb_laptops/devicetree.cb
index 52fd627c5a..b7744cb349 100644
--- a/src/mainboard/hp/snb_ivb_laptops/devicetree.cb
+++ b/src/mainboard/hp/snb_ivb_laptops/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	register "gfx.did" = "{ 0x80000100, 0x80000240, 0x80000410 }"
diff --git a/src/mainboard/hp/snb_ivb_laptops/variants/2570p/overridetree.cb b/src/mainboard/hp/snb_ivb_laptops/variants/2570p/overridetree.cb
index e6701d6bac..44e0eeb514 100644
--- a/src/mainboard/hp/snb_ivb_laptops/variants/2570p/overridetree.cb
+++ b/src/mainboard/hp/snb_ivb_laptops/variants/2570p/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	register "gpu_cpu_backlight" = "0x00000437"
diff --git a/src/mainboard/hp/snb_ivb_laptops/variants/2760p/overridetree.cb b/src/mainboard/hp/snb_ivb_laptops/variants/2760p/overridetree.cb
index 86b4da92a3..034192862d 100644
--- a/src/mainboard/hp/snb_ivb_laptops/variants/2760p/overridetree.cb
+++ b/src/mainboard/hp/snb_ivb_laptops/variants/2760p/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	register "gpu_cpu_backlight" = "0x00000129"
diff --git a/src/mainboard/hp/snb_ivb_laptops/variants/8460p/overridetree.cb b/src/mainboard/hp/snb_ivb_laptops/variants/8460p/overridetree.cb
index 0d678e684c..ebb4412f8d 100644
--- a/src/mainboard/hp/snb_ivb_laptops/variants/8460p/overridetree.cb
+++ b/src/mainboard/hp/snb_ivb_laptops/variants/8460p/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	register "gpu_cpu_backlight" = "0x00000129"
diff --git a/src/mainboard/hp/snb_ivb_laptops/variants/8470p/overridetree.cb b/src/mainboard/hp/snb_ivb_laptops/variants/8470p/overridetree.cb
index 432294e3b5..284231fec2 100644
--- a/src/mainboard/hp/snb_ivb_laptops/variants/8470p/overridetree.cb
+++ b/src/mainboard/hp/snb_ivb_laptops/variants/8470p/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	register "gpu_cpu_backlight" = "0x00000385"
diff --git a/src/mainboard/hp/snb_ivb_laptops/variants/8770w/overridetree.cb b/src/mainboard/hp/snb_ivb_laptops/variants/8770w/overridetree.cb
index b625500af8..8375c371e1 100644
--- a/src/mainboard/hp/snb_ivb_laptops/variants/8770w/overridetree.cb
+++ b/src/mainboard/hp/snb_ivb_laptops/variants/8770w/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	device domain 0x0 on
diff --git a/src/mainboard/hp/snb_ivb_laptops/variants/folio_9470m/overridetree.cb b/src/mainboard/hp/snb_ivb_laptops/variants/folio_9470m/overridetree.cb
index 5179e3ad9f..37694e0e7a 100644
--- a/src/mainboard/hp/snb_ivb_laptops/variants/folio_9470m/overridetree.cb
+++ b/src/mainboard/hp/snb_ivb_laptops/variants/folio_9470m/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	register "gpu_cpu_backlight" = "0x00000d9c"
diff --git a/src/mainboard/hp/snb_ivb_laptops/variants/revolve_810_g1/overridetree.cb b/src/mainboard/hp/snb_ivb_laptops/variants/revolve_810_g1/overridetree.cb
index 2a02a1b3b1..af87ad4182 100644
--- a/src/mainboard/hp/snb_ivb_laptops/variants/revolve_810_g1/overridetree.cb
+++ b/src/mainboard/hp/snb_ivb_laptops/variants/revolve_810_g1/overridetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	register "gpu_cpu_backlight" = "0x00000263"
diff --git a/src/mainboard/intel/d510mo/devicetree.cb b/src/mainboard/intel/d510mo/devicetree.cb
index c1d7a5dc89..14fe790728 100644
--- a/src/mainboard/intel/d510mo/devicetree.cb
+++ b/src/mainboard/intel/d510mo/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/pineview		# Northbridge
   register "gfx.use_spread_spectrum_clock" = "0"
diff --git a/src/mainboard/intel/dg41wv/devicetree.cb b/src/mainboard/intel/dg41wv/devicetree.cb
index e24e304bbe..0bdae0a566 100644
--- a/src/mainboard/intel/dg41wv/devicetree.cb
+++ b/src/mainboard/intel/dg41wv/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/intel/dg43gt/devicetree.cb b/src/mainboard/intel/dg43gt/devicetree.cb
index 86fae88c65..7708e2d860 100644
--- a/src/mainboard/intel/dg43gt/devicetree.cb
+++ b/src/mainboard/intel/dg43gt/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/lenovo/thinkcentre_a58/devicetree.cb b/src/mainboard/lenovo/thinkcentre_a58/devicetree.cb
index b9a53dffc1..b6a406668e 100644
--- a/src/mainboard/lenovo/thinkcentre_a58/devicetree.cb
+++ b/src/mainboard/lenovo/thinkcentre_a58/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/x4x		# Northbridge
 	device cpu_cluster 0 on		# APIC cluster
diff --git a/src/mainboard/ocp/tiogapass/Kconfig b/src/mainboard/ocp/tiogapass/Kconfig
index f9b5e7f48a..5cb2421cb0 100644
--- a/src/mainboard/ocp/tiogapass/Kconfig
+++ b/src/mainboard/ocp/tiogapass/Kconfig
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 if BOARD_OCP_TIOGAPASS
 
diff --git a/src/mainboard/ocp/tiogapass/Makefile.inc b/src/mainboard/ocp/tiogapass/Makefile.inc
index e80a5940e5..18cc9b9b7c 100644
--- a/src/mainboard/ocp/tiogapass/Makefile.inc
+++ b/src/mainboard/ocp/tiogapass/Makefile.inc
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 bootblock-y += bootblock.c
 ramstage-y += ramstage.c
diff --git a/src/mainboard/ocp/tiogapass/devicetree.cb b/src/mainboard/ocp/tiogapass/devicetree.cb
index 51e6a62eb1..19dba55c29 100644
--- a/src/mainboard/ocp/tiogapass/devicetree.cb
+++ b/src/mainboard/ocp/tiogapass/devicetree.cb
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 chip soc/intel/xeon_sp/skx
 
diff --git a/src/mainboard/sapphire/pureplatinumh61/Makefile.inc b/src/mainboard/sapphire/pureplatinumh61/Makefile.inc
index 56b1e09dda..786cfa5818 100644
--- a/src/mainboard/sapphire/pureplatinumh61/Makefile.inc
+++ b/src/mainboard/sapphire/pureplatinumh61/Makefile.inc
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 bootblock-y += gpio.c
 romstage-y += gpio.c
diff --git a/src/mainboard/sapphire/pureplatinumh61/devicetree.cb b/src/mainboard/sapphire/pureplatinumh61/devicetree.cb
index 529e6feb29..a88287ed74 100644
--- a/src/mainboard/sapphire/pureplatinumh61/devicetree.cb
+++ b/src/mainboard/sapphire/pureplatinumh61/devicetree.cb
@@ -1,17 +1,5 @@
-#
 # This file is part of the coreboot project.
-#
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# 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-or-later
 
 chip northbridge/intel/sandybridge
 	device cpu_cluster 0x0 on
diff --git a/src/mainboard/supermicro/x10slm-f/Kconfig b/src/mainboard/supermicro/x10slm-f/Kconfig
index 0f531773b9..c3183d8013 100644
--- a/src/mainboard/supermicro/x10slm-f/Kconfig
+++ b/src/mainboard/supermicro/x10slm-f/Kconfig
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 if BOARD_SUPERMICRO_X10SLM_PLUS_F
 
diff --git a/src/mainboard/supermicro/x10slm-f/Makefile.inc b/src/mainboard/supermicro/x10slm-f/Makefile.inc
index f4ca029066..f5d0b8fe8e 100644
--- a/src/mainboard/supermicro/x10slm-f/Makefile.inc
+++ b/src/mainboard/supermicro/x10slm-f/Makefile.inc
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 romstage-y += gpio.c
 bootblock-y += bootblock.c
diff --git a/src/mainboard/supermicro/x10slm-f/devicetree.cb b/src/mainboard/supermicro/x10slm-f/devicetree.cb
index 2dd5c5dfe8..56a7733fc2 100644
--- a/src/mainboard/supermicro/x10slm-f/devicetree.cb
+++ b/src/mainboard/supermicro/x10slm-f/devicetree.cb
@@ -1,17 +1,5 @@
-##
 ## This file is part of the coreboot project.
-##
-##
-## This program is free software: you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation, either version 2 of the License, or
-## (at your option) any later version.
-##
-## 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-or-later
 
 chip northbridge/intel/haswell