drivers: Add SPDX license headers to Makefiles

To help identify the licenses of the various files contained in the
coreboot source, we've added SPDX headers to the top of all of the
.c and .h files. This extends that practice to Makefiles.

Any file in the coreboot project without a specific license is bound
to the license of the overall coreboot project, GPL Version 2.

This patch adds the GPL V2 license identifier to the top of all
makefiles in the drivers directory that don't already have an SPDX
license line at the top.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I8442bc18ce228eca88a084660be84bcd1c5de928
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68980
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Tim Crawford <tcrawford@system76.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>

8 files changed, 16 insertions, 0 deletions

diff --git a/src/drivers/intel/dptf/Makefile.inc b/src/drivers/intel/dptf/Makefile.inc
index 42607f8a540a..41f415872250 100644
--- a/src/drivers/intel/dptf/Makefile.inc
+++ b/src/drivers/intel/dptf/Makefile.inc
@@ -1 +1,3 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_DRIVERS_INTEL_DPTF) += dptf.c
diff --git a/src/drivers/intel/ish/Makefile.inc b/src/drivers/intel/ish/Makefile.inc
index cab2b1d80419..dfa4b1c44421 100644
--- a/src/drivers/intel/ish/Makefile.inc
+++ b/src/drivers/intel/ish/Makefile.inc
@@ -1 +1,3 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_DRIVERS_INTEL_ISH) += ish.c
diff --git a/src/drivers/intel/mipi_camera/Makefile.inc b/src/drivers/intel/mipi_camera/Makefile.inc
index 85f67b26062a..fca832630723 100644
--- a/src/drivers/intel/mipi_camera/Makefile.inc
+++ b/src/drivers/intel/mipi_camera/Makefile.inc
@@ -1 +1,3 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_DRIVERS_INTEL_MIPI_CAMERA) += camera.c
diff --git a/src/drivers/intel/pmc_mux/Makefile.inc b/src/drivers/intel/pmc_mux/Makefile.inc
index 61c957e51463..f607135dea3c 100644
--- a/src/drivers/intel/pmc_mux/Makefile.inc
+++ b/src/drivers/intel/pmc_mux/Makefile.inc
@@ -1,2 +1,4 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 subdirs-y += conn
 ramstage-$(CONFIG_DRIVERS_INTEL_PMC) += mux.c
diff --git a/src/drivers/intel/pmc_mux/conn/Makefile.inc b/src/drivers/intel/pmc_mux/conn/Makefile.inc
index babca2f9bbcd..668351b4df1a 100644
--- a/src/drivers/intel/pmc_mux/conn/Makefile.inc
+++ b/src/drivers/intel/pmc_mux/conn/Makefile.inc
@@ -1 +1,3 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_DRIVERS_INTEL_PMC) += conn.c
diff --git a/src/drivers/intel/ptt/Makefile.inc b/src/drivers/intel/ptt/Makefile.inc
index fdecc89b9f56..bab1789fd93d 100644
--- a/src/drivers/intel/ptt/Makefile.inc
+++ b/src/drivers/intel/ptt/Makefile.inc
@@ -1,3 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 romstage-$(CONFIG_HAVE_INTEL_PTT) += ptt.c
 ramstage-$(CONFIG_HAVE_INTEL_PTT) += ptt.c
 postcar-$(CONFIG_HAVE_INTEL_PTT) += ptt.c
diff --git a/src/drivers/intel/soundwire/Makefile.inc b/src/drivers/intel/soundwire/Makefile.inc
index 1f6773ec2694..044e2ab8e989 100644
--- a/src/drivers/intel/soundwire/Makefile.inc
+++ b/src/drivers/intel/soundwire/Makefile.inc
@@ -1 +1,3 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_DRIVERS_INTEL_SOUNDWIRE) += soundwire.c
diff --git a/src/drivers/intel/usb4/retimer/Makefile.inc b/src/drivers/intel/usb4/retimer/Makefile.inc
index bca23aa3bfec..1c814850bdd9 100644
--- a/src/drivers/intel/usb4/retimer/Makefile.inc
+++ b/src/drivers/intel/usb4/retimer/Makefile.inc
@@ -1 +1,3 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
 ramstage-$(CONFIG_DRIVERS_INTEL_USB4_RETIMER) += retimer.c