mb/google/cyan: Use SPDX for GPL-2.0-only files

Done with sed and God Lines. Only done for C-like code for now.

Change-Id: I1122cdc74a71be6d108998fe7027033394ed6459
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40167
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

99 files changed, 198 insertions, 1305 deletions

diff --git a/src/mainboard/google/cyan/acpi/codec_maxim.asl b/src/mainboard/google/cyan/acpi/codec_maxim.asl
index a33f80a7306c..2a790b46bd5b 100644
--- a/src/mainboard/google/cyan/acpi/codec_maxim.asl
+++ b/src/mainboard/google/cyan/acpi/codec_maxim.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 Scope (\_SB.PCI0.I2C2)
 {
diff --git a/src/mainboard/google/cyan/acpi/codec_realtek.asl b/src/mainboard/google/cyan/acpi/codec_realtek.asl
index 34bf109b89d0..c5ca2979965f 100644
--- a/src/mainboard/google/cyan/acpi/codec_realtek.asl
+++ b/src/mainboard/google/cyan/acpi/codec_realtek.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 Scope (\_SB.PCI0.I2C5)
 {
diff --git a/src/mainboard/google/cyan/acpi/dptf.asl b/src/mainboard/google/cyan/acpi/dptf.asl
index 97dd96f04d2d..3271754a9c70 100644
--- a/src/mainboard/google/cyan/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Include Variant DPTF */
 #include <variant/acpi/dptf.asl>
diff --git a/src/mainboard/google/cyan/acpi/ec.asl b/src/mainboard/google/cyan/acpi/ec.asl
index da185cbc805d..08ab88dd14d9 100644
--- a/src/mainboard/google/cyan/acpi/ec.asl
+++ b/src/mainboard/google/cyan/acpi/ec.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* mainboard configuration */
 #include <ec.h>
diff --git a/src/mainboard/google/cyan/acpi/mainboard.asl b/src/mainboard/google/cyan/acpi/mainboard.asl
index 0fc0d94a151c..2c02fbebfdec 100644
--- a/src/mainboard/google/cyan/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <variant/onboard.h>
 
diff --git a/src/mainboard/google/cyan/acpi/superio.asl b/src/mainboard/google/cyan/acpi/superio.asl
index ff98b9053a9c..251ef26b3032 100644
--- a/src/mainboard/google/cyan/acpi/superio.asl
+++ b/src/mainboard/google/cyan/acpi/superio.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* mainboard configuration */
 #include <ec.h>
diff --git a/src/mainboard/google/cyan/acpi/touchscreen_elan.asl b/src/mainboard/google/cyan/acpi/touchscreen_elan.asl
index 2b6f1486318a..cac588a1b206 100644
--- a/src/mainboard/google/cyan/acpi/touchscreen_elan.asl
+++ b/src/mainboard/google/cyan/acpi/touchscreen_elan.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 Scope (\_SB.PCI0.I2C1)
 {
diff --git a/src/mainboard/google/cyan/acpi/touchscreen_melfas.asl b/src/mainboard/google/cyan/acpi/touchscreen_melfas.asl
index 9391be7fed45..3a059143caa5 100644
--- a/src/mainboard/google/cyan/acpi/touchscreen_melfas.asl
+++ b/src/mainboard/google/cyan/acpi/touchscreen_melfas.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 Scope (\_SB.PCI0.I2C1)
 {
diff --git a/src/mainboard/google/cyan/acpi/touchscreen_synaptics.asl b/src/mainboard/google/cyan/acpi/touchscreen_synaptics.asl
index 7585cb75f80a..4b1695219e8a 100644
--- a/src/mainboard/google/cyan/acpi/touchscreen_synaptics.asl
+++ b/src/mainboard/google/cyan/acpi/touchscreen_synaptics.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 Scope (\_SB.PCI0.I2C1)
 {
diff --git a/src/mainboard/google/cyan/acpi/trackpad_atmel.asl b/src/mainboard/google/cyan/acpi/trackpad_atmel.asl
index a1335d9952a1..a6b82f287da8 100644
--- a/src/mainboard/google/cyan/acpi/trackpad_atmel.asl
+++ b/src/mainboard/google/cyan/acpi/trackpad_atmel.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 Scope (\_SB.PCI0.I2C6)
 {
diff --git a/src/mainboard/google/cyan/acpi/trackpad_elan.asl b/src/mainboard/google/cyan/acpi/trackpad_elan.asl
index 9163cff52a51..04e51ded39e2 100644
--- a/src/mainboard/google/cyan/acpi/trackpad_elan.asl
+++ b/src/mainboard/google/cyan/acpi/trackpad_elan.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 Scope (\_SB.PCI0.I2C6)
 {
diff --git a/src/mainboard/google/cyan/acpi_tables.c b/src/mainboard/google/cyan/acpi_tables.c
index 00b3c08165fe..20d218df2eea 100644
--- a/src/mainboard/google/cyan/acpi_tables.c
+++ b/src/mainboard/google/cyan/acpi_tables.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <arch/acpi.h>
 #include <arch/ioapic.h>
diff --git a/src/mainboard/google/cyan/chromeos.c b/src/mainboard/google/cyan/chromeos.c
index 2968f8d676f6..da41162cf069 100644
--- a/src/mainboard/google/cyan/chromeos.c
+++ b/src/mainboard/google/cyan/chromeos.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <boot/coreboot_tables.h>
 #include <device/mmio.h>
diff --git a/src/mainboard/google/cyan/com_init.c b/src/mainboard/google/cyan/com_init.c
index 8c456d3422e9..5d82115be0dd 100644
--- a/src/mainboard/google/cyan/com_init.c
+++ b/src/mainboard/google/cyan/com_init.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <bootblock_common.h>
 #include <device/mmio.h>
diff --git a/src/mainboard/google/cyan/dsdt.asl b/src/mainboard/google/cyan/dsdt.asl
index f9f494093e84..84544fcc5525 100644
--- a/src/mainboard/google/cyan/dsdt.asl
+++ b/src/mainboard/google/cyan/dsdt.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <arch/acpi.h>
 DefinitionBlock(
diff --git a/src/mainboard/google/cyan/ec.c b/src/mainboard/google/cyan/ec.c
index 8ebd096da500..55c3e1ff3c36 100644
--- a/src/mainboard/google/cyan/ec.c
+++ b/src/mainboard/google/cyan/ec.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <arch/acpi.h>
 #include <console/console.h>
diff --git a/src/mainboard/google/cyan/ec.h b/src/mainboard/google/cyan/ec.h
index 450d863ba321..b93c53fa3305 100644
--- a/src/mainboard/google/cyan/ec.h
+++ b/src/mainboard/google/cyan/ec.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef MAINBOARD_EC_H
 #define MAINBOARD_EC_H
diff --git a/src/mainboard/google/cyan/fadt.c b/src/mainboard/google/cyan/fadt.c
index 9e5af024e4de..8d746676e964 100644
--- a/src/mainboard/google/cyan/fadt.c
+++ b/src/mainboard/google/cyan/fadt.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/acpi.h>
 #include <string.h>
diff --git a/src/mainboard/google/cyan/irqroute.c b/src/mainboard/google/cyan/irqroute.c
index f0855adbc27f..df43ee9c692e 100644
--- a/src/mainboard/google/cyan/irqroute.c
+++ b/src/mainboard/google/cyan/irqroute.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include "irqroute.h"
 
diff --git a/src/mainboard/google/cyan/irqroute.h b/src/mainboard/google/cyan/irqroute.h
index 85d8a5f93b0c..cacabfee849f 100644
--- a/src/mainboard/google/cyan/irqroute.h
+++ b/src/mainboard/google/cyan/irqroute.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/irq.h>
 #include <soc/pci_devs.h>
diff --git a/src/mainboard/google/cyan/mainboard.c b/src/mainboard/google/cyan/mainboard.c
index 2ef44d49d84c..a87ca8bbf457 100644
--- a/src/mainboard/google/cyan/mainboard.c
+++ b/src/mainboard/google/cyan/mainboard.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <device/device.h>
 #include <vendorcode/google/chromeos/chromeos.h>
diff --git a/src/mainboard/google/cyan/romstage.c b/src/mainboard/google/cyan/romstage.c
index 7116b71ffc89..1501c3b668b2 100644
--- a/src/mainboard/google/cyan/romstage.c
+++ b/src/mainboard/google/cyan/romstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/romstage.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/cyan/smihandler.c b/src/mainboard/google/cyan/smihandler.c
index 287191510637..8b1032de633e 100644
--- a/src/mainboard/google/cyan/smihandler.c
+++ b/src/mainboard/google/cyan/smihandler.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <arch/acpi.h>
 #include <arch/io.h>
diff --git a/src/mainboard/google/cyan/spd/spd.c b/src/mainboard/google/cyan/spd/spd.c
index cb65b091db04..7ceb27db494c 100644
--- a/src/mainboard/google/cyan/spd/spd.c
+++ b/src/mainboard/google/cyan/spd/spd.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <cbfs.h>
 #include <cbmem.h>
diff --git a/src/mainboard/google/cyan/spd/spd_util.h b/src/mainboard/google/cyan/spd/spd_util.h
index cd65be50a413..5e13ddf724ac 100644
--- a/src/mainboard/google/cyan/spd/spd_util.h
+++ b/src/mainboard/google/cyan/spd/spd_util.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef SPD_UTIL_H
 #define SPD_UTIL_H
diff --git a/src/mainboard/google/cyan/variants/banon/gpio.c b/src/mainboard/google/cyan/variants/banon/gpio.c
index c0a1cb25b6c6..fa1ef880f0ff 100644
--- a/src/mainboard/google/cyan/variants/banon/gpio.c
+++ b/src/mainboard/google/cyan/variants/banon/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/banon/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/banon/include/variant/acpi/dptf.asl
index 9be7ba5dd398..6a7a09450c87 100644
--- a/src/mainboard/google/cyan/variants/banon/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/banon/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_Internal"
diff --git a/src/mainboard/google/cyan/variants/banon/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/banon/include/variant/acpi/mainboard.asl
index e2a50d616189..ba4290c43ede 100644
--- a/src/mainboard/google/cyan/variants/banon/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/banon/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Elan trackpad */
 #include <acpi/trackpad_elan.asl>
diff --git a/src/mainboard/google/cyan/variants/banon/include/variant/onboard.h b/src/mainboard/google/cyan/variants/banon/include/variant/onboard.h
index d8d91af1f878..5a736170ea24 100644
--- a/src/mainboard/google/cyan/variants/banon/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/banon/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/banon/romstage.c b/src/mainboard/google/cyan/variants/banon/romstage.c
index 22787aae2704..d1e1a1cf3dc3 100644
--- a/src/mainboard/google/cyan/variants/banon/romstage.c
+++ b/src/mainboard/google/cyan/variants/banon/romstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/romstage.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/cyan/variants/banon/spd_util.c b/src/mainboard/google/cyan/variants/banon/spd_util.c
index 1b31e63d8a74..093b06a4f1ad 100644
--- a/src/mainboard/google/cyan/variants/banon/spd_util.c
+++ b/src/mainboard/google/cyan/variants/banon/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/cyan/variants/baseboard/include/baseboard/variants.h
index 3609df5874b0..305facc48119 100644
--- a/src/mainboard/google/cyan/variants/baseboard/include/baseboard/variants.h
+++ b/src/mainboard/google/cyan/variants/baseboard/include/baseboard/variants.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef BASEBOARD_VARIANTS_H
 #define BASEBOARD_VARIANTS_H
diff --git a/src/mainboard/google/cyan/variants/celes/gpio.c b/src/mainboard/google/cyan/variants/celes/gpio.c
index 5304ed061574..3f5f17de7de9 100644
--- a/src/mainboard/google/cyan/variants/celes/gpio.c
+++ b/src/mainboard/google/cyan/variants/celes/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/celes/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/celes/include/variant/acpi/dptf.asl
index 6c53db92add8..872bc485c380 100644
--- a/src/mainboard/google/cyan/variants/celes/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/celes/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"NCP15WB_CPU"
diff --git a/src/mainboard/google/cyan/variants/celes/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/celes/include/variant/acpi/mainboard.asl
index 3ee53944316e..5bed5cb097e0 100644
--- a/src/mainboard/google/cyan/variants/celes/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/celes/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Atmel trackpad */
 #include <acpi/trackpad_atmel.asl>
diff --git a/src/mainboard/google/cyan/variants/celes/include/variant/onboard.h b/src/mainboard/google/cyan/variants/celes/include/variant/onboard.h
index ec45a1eb9ac6..48d5501332bd 100644
--- a/src/mainboard/google/cyan/variants/celes/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/celes/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/celes/ramstage.c b/src/mainboard/google/cyan/variants/celes/ramstage.c
index bc8c3a97c78f..bb2d1074d877 100644
--- a/src/mainboard/google/cyan/variants/celes/ramstage.c
+++ b/src/mainboard/google/cyan/variants/celes/ramstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/ramstage.h>
 
diff --git a/src/mainboard/google/cyan/variants/celes/spd_util.c b/src/mainboard/google/cyan/variants/celes/spd_util.c
index 58726c182a4b..42f3e71e48c0 100644
--- a/src/mainboard/google/cyan/variants/celes/spd_util.c
+++ b/src/mainboard/google/cyan/variants/celes/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <gpio.h>
diff --git a/src/mainboard/google/cyan/variants/cyan/gpio.c b/src/mainboard/google/cyan/variants/cyan/gpio.c
index 1e8590ed5685..c9cd2867192f 100644
--- a/src/mainboard/google/cyan/variants/cyan/gpio.c
+++ b/src/mainboard/google/cyan/variants/cyan/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/cyan/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/cyan/include/variant/acpi/dptf.asl
index 83ba03035afc..a4469a41ef7a 100644
--- a/src/mainboard/google/cyan/variants/cyan/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/cyan/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_Internal"
diff --git a/src/mainboard/google/cyan/variants/cyan/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/cyan/include/variant/acpi/mainboard.asl
index dd30a68f2fb5..2a0460de92a2 100644
--- a/src/mainboard/google/cyan/variants/cyan/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/cyan/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Elan touchscreen */
 #include <acpi/touchscreen_elan.asl>
diff --git a/src/mainboard/google/cyan/variants/cyan/include/variant/onboard.h b/src/mainboard/google/cyan/variants/cyan/include/variant/onboard.h
index 5d5ffbc2f110..6dec60ca0b57 100644
--- a/src/mainboard/google/cyan/variants/cyan/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/cyan/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/cyan/spd_util.c b/src/mainboard/google/cyan/variants/cyan/spd_util.c
index fc0eebb87bde..238021893f4f 100644
--- a/src/mainboard/google/cyan/variants/cyan/spd_util.c
+++ b/src/mainboard/google/cyan/variants/cyan/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/variants/edgar/gpio.c b/src/mainboard/google/cyan/variants/edgar/gpio.c
index 487046a3f2ec..f90ca79be245 100644
--- a/src/mainboard/google/cyan/variants/edgar/gpio.c
+++ b/src/mainboard/google/cyan/variants/edgar/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/edgar/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/edgar/include/variant/acpi/dptf.asl
index f76f282f682d..919369af5e01 100644
--- a/src/mainboard/google/cyan/variants/edgar/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/edgar/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_Internal"
diff --git a/src/mainboard/google/cyan/variants/edgar/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/edgar/include/variant/acpi/mainboard.asl
index 19ec65ae637f..ba4290c43ede 100644
--- a/src/mainboard/google/cyan/variants/edgar/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/edgar/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Elan trackpad */
 #include <acpi/trackpad_elan.asl>
diff --git a/src/mainboard/google/cyan/variants/edgar/include/variant/onboard.h b/src/mainboard/google/cyan/variants/edgar/include/variant/onboard.h
index e676768c2390..c55a50f9987b 100644
--- a/src/mainboard/google/cyan/variants/edgar/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/edgar/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/edgar/romstage.c b/src/mainboard/google/cyan/variants/edgar/romstage.c
index 1cfc978680be..d5ce6b87bf15 100644
--- a/src/mainboard/google/cyan/variants/edgar/romstage.c
+++ b/src/mainboard/google/cyan/variants/edgar/romstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/romstage.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/cyan/variants/edgar/spd_util.c b/src/mainboard/google/cyan/variants/edgar/spd_util.c
index 5197d1b33c6f..698f2d9dd058 100644
--- a/src/mainboard/google/cyan/variants/edgar/spd_util.c
+++ b/src/mainboard/google/cyan/variants/edgar/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/variants/kefka/gpio.c b/src/mainboard/google/cyan/variants/kefka/gpio.c
index 1fe8f604a0cf..ccff0821e6c1 100644
--- a/src/mainboard/google/cyan/variants/kefka/gpio.c
+++ b/src/mainboard/google/cyan/variants/kefka/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/kefka/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/kefka/include/variant/acpi/dptf.asl
index 7fc05e0d33d6..54f78ff321df 100644
--- a/src/mainboard/google/cyan/variants/kefka/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/kefka/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_Internal"
diff --git a/src/mainboard/google/cyan/variants/kefka/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/kefka/include/variant/acpi/mainboard.asl
index 8cee06603880..0c5331d62b94 100644
--- a/src/mainboard/google/cyan/variants/kefka/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/kefka/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Elan touchscreen */
 #include <acpi/touchscreen_elan.asl>
diff --git a/src/mainboard/google/cyan/variants/kefka/include/variant/onboard.h b/src/mainboard/google/cyan/variants/kefka/include/variant/onboard.h
index a596f3898ea7..f16825de38b8 100644
--- a/src/mainboard/google/cyan/variants/kefka/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/kefka/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/kefka/ramstage.c b/src/mainboard/google/cyan/variants/kefka/ramstage.c
index 9dee808d6a57..e0ffcc227ff0 100644
--- a/src/mainboard/google/cyan/variants/kefka/ramstage.c
+++ b/src/mainboard/google/cyan/variants/kefka/ramstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/ramstage.h>
 
diff --git a/src/mainboard/google/cyan/variants/kefka/romstage.c b/src/mainboard/google/cyan/variants/kefka/romstage.c
index f2bf5a65c63d..5b10b755f530 100644
--- a/src/mainboard/google/cyan/variants/kefka/romstage.c
+++ b/src/mainboard/google/cyan/variants/kefka/romstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/romstage.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/cyan/variants/kefka/spd_util.c b/src/mainboard/google/cyan/variants/kefka/spd_util.c
index f7f387409b4c..a2e9636fcaa6 100644
--- a/src/mainboard/google/cyan/variants/kefka/spd_util.c
+++ b/src/mainboard/google/cyan/variants/kefka/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/variants/reks/gpio.c b/src/mainboard/google/cyan/variants/reks/gpio.c
index 82341e4c5d09..6d8cb509ac02 100644
--- a/src/mainboard/google/cyan/variants/reks/gpio.c
+++ b/src/mainboard/google/cyan/variants/reks/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/reks/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/reks/include/variant/acpi/dptf.asl
index e70eae029448..a2147dec9a1b 100644
--- a/src/mainboard/google/cyan/variants/reks/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/reks/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_PMIC"
diff --git a/src/mainboard/google/cyan/variants/reks/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/reks/include/variant/acpi/mainboard.asl
index 4a77209ed3f7..bc132913dbba 100644
--- a/src/mainboard/google/cyan/variants/reks/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/reks/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Melfas touchscreen */
 #include <acpi/touchscreen_melfas.asl>
diff --git a/src/mainboard/google/cyan/variants/reks/include/variant/onboard.h b/src/mainboard/google/cyan/variants/reks/include/variant/onboard.h
index eead309cf390..26a272d465fc 100644
--- a/src/mainboard/google/cyan/variants/reks/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/reks/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/reks/ramstage.c b/src/mainboard/google/cyan/variants/reks/ramstage.c
index e21213177317..d49f8f141c08 100644
--- a/src/mainboard/google/cyan/variants/reks/ramstage.c
+++ b/src/mainboard/google/cyan/variants/reks/ramstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/ramstage.h>
 
diff --git a/src/mainboard/google/cyan/variants/reks/romstage.c b/src/mainboard/google/cyan/variants/reks/romstage.c
index 312709b7eb9f..59a65b3077b4 100644
--- a/src/mainboard/google/cyan/variants/reks/romstage.c
+++ b/src/mainboard/google/cyan/variants/reks/romstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/romstage.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/cyan/variants/reks/spd_util.c b/src/mainboard/google/cyan/variants/reks/spd_util.c
index 00b47deb1b7b..6276853fd228 100644
--- a/src/mainboard/google/cyan/variants/reks/spd_util.c
+++ b/src/mainboard/google/cyan/variants/reks/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/variants/relm/gpio.c b/src/mainboard/google/cyan/variants/relm/gpio.c
index d452622e9d0f..61ede38d8a87 100644
--- a/src/mainboard/google/cyan/variants/relm/gpio.c
+++ b/src/mainboard/google/cyan/variants/relm/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/relm/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/relm/include/variant/acpi/dptf.asl
index e70eae029448..a2147dec9a1b 100644
--- a/src/mainboard/google/cyan/variants/relm/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/relm/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_PMIC"
diff --git a/src/mainboard/google/cyan/variants/relm/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/relm/include/variant/acpi/mainboard.asl
index 4a77209ed3f7..bc132913dbba 100644
--- a/src/mainboard/google/cyan/variants/relm/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/relm/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Melfas touchscreen */
 #include <acpi/touchscreen_melfas.asl>
diff --git a/src/mainboard/google/cyan/variants/relm/include/variant/onboard.h b/src/mainboard/google/cyan/variants/relm/include/variant/onboard.h
index 6d4d682e37a5..5fe421320777 100644
--- a/src/mainboard/google/cyan/variants/relm/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/relm/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/relm/ramstage.c b/src/mainboard/google/cyan/variants/relm/ramstage.c
index 0030d9f48ce5..54e11d27a9b5 100644
--- a/src/mainboard/google/cyan/variants/relm/ramstage.c
+++ b/src/mainboard/google/cyan/variants/relm/ramstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/ramstage.h>
 
diff --git a/src/mainboard/google/cyan/variants/relm/romstage.c b/src/mainboard/google/cyan/variants/relm/romstage.c
index 312709b7eb9f..59a65b3077b4 100644
--- a/src/mainboard/google/cyan/variants/relm/romstage.c
+++ b/src/mainboard/google/cyan/variants/relm/romstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/romstage.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/cyan/variants/relm/spd_util.c b/src/mainboard/google/cyan/variants/relm/spd_util.c
index 5315c5bae3f7..b9fd41e5f339 100644
--- a/src/mainboard/google/cyan/variants/relm/spd_util.c
+++ b/src/mainboard/google/cyan/variants/relm/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/variants/setzer/gpio.c b/src/mainboard/google/cyan/variants/setzer/gpio.c
index 70ffeba09d45..c2acb2b3f728 100644
--- a/src/mainboard/google/cyan/variants/setzer/gpio.c
+++ b/src/mainboard/google/cyan/variants/setzer/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/setzer/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/setzer/include/variant/acpi/dptf.asl
index 324d8bc351be..8807296f55fb 100644
--- a/src/mainboard/google/cyan/variants/setzer/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/setzer/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_Internal"
diff --git a/src/mainboard/google/cyan/variants/setzer/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/setzer/include/variant/acpi/mainboard.asl
index c976fb96d0e1..b7a67d3bcd0e 100644
--- a/src/mainboard/google/cyan/variants/setzer/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/setzer/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Synaptics touchscreen */
 #include <acpi/touchscreen_synaptics.asl>
diff --git a/src/mainboard/google/cyan/variants/setzer/include/variant/onboard.h b/src/mainboard/google/cyan/variants/setzer/include/variant/onboard.h
index 3f9f4a9b26d3..5a00f134cffb 100644
--- a/src/mainboard/google/cyan/variants/setzer/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/setzer/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/setzer/ramstage.c b/src/mainboard/google/cyan/variants/setzer/ramstage.c
index 84d2f438227c..b73bb97aac19 100644
--- a/src/mainboard/google/cyan/variants/setzer/ramstage.c
+++ b/src/mainboard/google/cyan/variants/setzer/ramstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/ramstage.h>
 
diff --git a/src/mainboard/google/cyan/variants/setzer/romstage.c b/src/mainboard/google/cyan/variants/setzer/romstage.c
index b36f09c0c936..5f400c3a4d37 100644
--- a/src/mainboard/google/cyan/variants/setzer/romstage.c
+++ b/src/mainboard/google/cyan/variants/setzer/romstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/romstage.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/cyan/variants/setzer/spd_util.c b/src/mainboard/google/cyan/variants/setzer/spd_util.c
index 43b57376c3c8..d9922d8cd192 100644
--- a/src/mainboard/google/cyan/variants/setzer/spd_util.c
+++ b/src/mainboard/google/cyan/variants/setzer/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <gpio.h>
diff --git a/src/mainboard/google/cyan/variants/terra/gpio.c b/src/mainboard/google/cyan/variants/terra/gpio.c
index 1f484fe51dc2..2e16bb88c8ce 100644
--- a/src/mainboard/google/cyan/variants/terra/gpio.c
+++ b/src/mainboard/google/cyan/variants/terra/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/charger.asl b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/charger.asl
index 8c8495f54017..9a5cbb94a99c 100644
--- a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/charger.asl
+++ b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/charger.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 Device (TCHG)
 {
diff --git a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/cpu.asl b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/cpu.asl
index 49991a8435a7..85632bd6e40b 100644
--- a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/cpu.asl
+++ b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/cpu.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef DPTF_CPU_PASSIVE
 #define DPTF_CPU_PASSIVE	80
diff --git a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/dptf.asl
index 4ace7195d694..d9dee4ae5cf0 100644
--- a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_CPU"
diff --git a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/mainboard.asl
index ad8f4de33281..cf6514d7eb27 100644
--- a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Elan trackpad */
 #include <acpi/trackpad_elan.asl>
diff --git a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/thermal.asl b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/thermal.asl
index 09f4b6d7f8d0..e2c8ddcfe06b 100644
--- a/src/mainboard/google/cyan/variants/terra/include/variant/acpi/thermal.asl
+++ b/src/mainboard/google/cyan/variants/terra/include/variant/acpi/thermal.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Thermal Threshold Event Handler */
 #define HAVE_THERM_EVENT_HANDLER
diff --git a/src/mainboard/google/cyan/variants/terra/include/variant/onboard.h b/src/mainboard/google/cyan/variants/terra/include/variant/onboard.h
index 2a8ff9f294cb..7c53e0e39b91 100644
--- a/src/mainboard/google/cyan/variants/terra/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/terra/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/terra/ramstage.c b/src/mainboard/google/cyan/variants/terra/ramstage.c
index edbe7e06adac..f7414221a7ef 100644
--- a/src/mainboard/google/cyan/variants/terra/ramstage.c
+++ b/src/mainboard/google/cyan/variants/terra/ramstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/ramstage.h>
 #include <boardid.h>
diff --git a/src/mainboard/google/cyan/variants/terra/romstage.c b/src/mainboard/google/cyan/variants/terra/romstage.c
index b1850c54918a..8640e8c408ab 100644
--- a/src/mainboard/google/cyan/variants/terra/romstage.c
+++ b/src/mainboard/google/cyan/variants/terra/romstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/romstage.h>
 #include <baseboard/variants.h>
diff --git a/src/mainboard/google/cyan/variants/terra/spd_util.c b/src/mainboard/google/cyan/variants/terra/spd_util.c
index 1483bab84a29..05fbb22421e6 100644
--- a/src/mainboard/google/cyan/variants/terra/spd_util.c
+++ b/src/mainboard/google/cyan/variants/terra/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/variants/ultima/gpio.c b/src/mainboard/google/cyan/variants/ultima/gpio.c
index 78d8a36d97d9..fc8776a334be 100644
--- a/src/mainboard/google/cyan/variants/ultima/gpio.c
+++ b/src/mainboard/google/cyan/variants/ultima/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/ultima/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/ultima/include/variant/acpi/dptf.asl
index 1499545e133a..7de355063c53 100644
--- a/src/mainboard/google/cyan/variants/ultima/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/ultima/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_Charger"
diff --git a/src/mainboard/google/cyan/variants/ultima/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/ultima/include/variant/acpi/mainboard.asl
index 8cee06603880..0c5331d62b94 100644
--- a/src/mainboard/google/cyan/variants/ultima/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/ultima/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Elan touchscreen */
 #include <acpi/touchscreen_elan.asl>
diff --git a/src/mainboard/google/cyan/variants/ultima/include/variant/onboard.h b/src/mainboard/google/cyan/variants/ultima/include/variant/onboard.h
index 73121a16c88e..e9e73768fab8 100644
--- a/src/mainboard/google/cyan/variants/ultima/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/ultima/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/ultima/ramstage.c b/src/mainboard/google/cyan/variants/ultima/ramstage.c
index 8ffee5ae759f..20159f9972b2 100644
--- a/src/mainboard/google/cyan/variants/ultima/ramstage.c
+++ b/src/mainboard/google/cyan/variants/ultima/ramstage.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/ramstage.h>
 
diff --git a/src/mainboard/google/cyan/variants/ultima/spd_util.c b/src/mainboard/google/cyan/variants/ultima/spd_util.c
index ce3cf7fd87cc..f32b23b8a2e9 100644
--- a/src/mainboard/google/cyan/variants/ultima/spd_util.c
+++ b/src/mainboard/google/cyan/variants/ultima/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/variants/wizpig/gpio.c b/src/mainboard/google/cyan/variants/wizpig/gpio.c
index d96c848f6d0a..603e91d965a8 100644
--- a/src/mainboard/google/cyan/variants/wizpig/gpio.c
+++ b/src/mainboard/google/cyan/variants/wizpig/gpio.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <mainboard/google/cyan/irqroute.h>
 #include <soc/gpio.h>
diff --git a/src/mainboard/google/cyan/variants/wizpig/include/variant/acpi/dptf.asl b/src/mainboard/google/cyan/variants/wizpig/include/variant/acpi/dptf.asl
index 775971ac318a..fcf4cf71b3c0 100644
--- a/src/mainboard/google/cyan/variants/wizpig/include/variant/acpi/dptf.asl
+++ b/src/mainboard/google/cyan/variants/wizpig/include/variant/acpi/dptf.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #define DPTF_TSR0_SENSOR_ID	0
 #define DPTF_TSR0_SENSOR_NAME	"TMP432_Internal"
diff --git a/src/mainboard/google/cyan/variants/wizpig/include/variant/acpi/mainboard.asl b/src/mainboard/google/cyan/variants/wizpig/include/variant/acpi/mainboard.asl
index 8cee06603880..0c5331d62b94 100644
--- a/src/mainboard/google/cyan/variants/wizpig/include/variant/acpi/mainboard.asl
+++ b/src/mainboard/google/cyan/variants/wizpig/include/variant/acpi/mainboard.asl
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 /* Elan touchscreen */
 #include <acpi/touchscreen_elan.asl>
diff --git a/src/mainboard/google/cyan/variants/wizpig/include/variant/onboard.h b/src/mainboard/google/cyan/variants/wizpig/include/variant/onboard.h
index 4be300d83e92..b0161a8fedfe 100644
--- a/src/mainboard/google/cyan/variants/wizpig/include/variant/onboard.h
+++ b/src/mainboard/google/cyan/variants/wizpig/include/variant/onboard.h
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #ifndef ONBOARD_H
 #define ONBOARD_H
diff --git a/src/mainboard/google/cyan/variants/wizpig/spd_util.c b/src/mainboard/google/cyan/variants/wizpig/spd_util.c
index f055fee423aa..04528a874505 100644
--- a/src/mainboard/google/cyan/variants/wizpig/spd_util.c
+++ b/src/mainboard/google/cyan/variants/wizpig/spd_util.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <console/console.h>
 #include <mainboard/google/cyan/spd/spd_util.h>
diff --git a/src/mainboard/google/cyan/w25q64.c b/src/mainboard/google/cyan/w25q64.c
index 9780e0ac1cef..c50a38c04df1 100644
--- a/src/mainboard/google/cyan/w25q64.c
+++ b/src/mainboard/google/cyan/w25q64.c
@@ -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; 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 */
+/* This file is part of the coreboot project. */
 
 #include <soc/spi.h>
 #include <string.h>