Move all license headers to SPDX format.

29 files changed, 29 insertions, 348 deletions

diff --git a/host/lib/usrp/dboard/CMakeLists.txt b/host/lib/usrp/dboard/CMakeLists.txt
index 183496734..70d9342ef 100644
--- a/host/lib/usrp/dboard/CMakeLists.txt
+++ b/host/lib/usrp/dboard/CMakeLists.txt
@@ -1,18 +1,7 @@
 #
 # Copyright 2010-2011 Ettus Research LLC
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: GPL-3.0
 #
 
 ########################################################################
diff --git a/host/lib/usrp/dboard/db_basic_and_lf.cpp b/host/lib/usrp/dboard/db_basic_and_lf.cpp
index a3d9fb316..eb2f92dfe 100644
--- a/host/lib/usrp/dboard/db_basic_and_lf.cpp
+++ b/host/lib/usrp/dboard/db_basic_and_lf.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/types/dict.hpp>
diff --git a/host/lib/usrp/dboard/db_cbx.cpp b/host/lib/usrp/dboard/db_cbx.cpp
index cc98205e9..7fb8e4769 100644
--- a/host/lib/usrp/dboard/db_cbx.cpp
+++ b/host/lib/usrp/dboard/db_cbx.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "db_sbx_common.hpp"
diff --git a/host/lib/usrp/dboard/db_dbsrx.cpp b/host/lib/usrp/dboard/db_dbsrx.cpp
index ecfeb5308..0d5442ffd 100644
--- a/host/lib/usrp/dboard/db_dbsrx.cpp
+++ b/host/lib/usrp/dboard/db_dbsrx.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 // No RX IO Pins Used
diff --git a/host/lib/usrp/dboard/db_dbsrx2.cpp b/host/lib/usrp/dboard/db_dbsrx2.cpp
index 8cc209218..edec9e73e 100644
--- a/host/lib/usrp/dboard/db_dbsrx2.cpp
+++ b/host/lib/usrp/dboard/db_dbsrx2.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 // No RX IO Pins Used
diff --git a/host/lib/usrp/dboard/db_e3x0.cpp b/host/lib/usrp/dboard/db_e3x0.cpp
index c7cc52d73..6537c618b 100644
--- a/host/lib/usrp/dboard/db_e3x0.cpp
+++ b/host/lib/usrp/dboard/db_e3x0.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/utils/static.hpp>
diff --git a/host/lib/usrp/dboard/db_rfx.cpp b/host/lib/usrp/dboard/db_rfx.cpp
index e8ceb7d49..1d7a439ad 100644
--- a/host/lib/usrp/dboard/db_rfx.cpp
+++ b/host/lib/usrp/dboard/db_rfx.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 // IO Pin functions
diff --git a/host/lib/usrp/dboard/db_sbx_common.cpp b/host/lib/usrp/dboard/db_sbx_common.cpp
index 42c080155..71e7e4864 100644
--- a/host/lib/usrp/dboard/db_sbx_common.cpp
+++ b/host/lib/usrp/dboard/db_sbx_common.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "db_sbx_common.hpp"
diff --git a/host/lib/usrp/dboard/db_sbx_common.hpp b/host/lib/usrp/dboard/db_sbx_common.hpp
index 8f305a7c4..ab83ea06f 100644
--- a/host/lib/usrp/dboard/db_sbx_common.hpp
+++ b/host/lib/usrp/dboard/db_sbx_common.hpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/types/device_addr.hpp>
diff --git a/host/lib/usrp/dboard/db_sbx_version3.cpp b/host/lib/usrp/dboard/db_sbx_version3.cpp
index f35c09946..40c9cf7a2 100644
--- a/host/lib/usrp/dboard/db_sbx_version3.cpp
+++ b/host/lib/usrp/dboard/db_sbx_version3.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 
diff --git a/host/lib/usrp/dboard/db_sbx_version4.cpp b/host/lib/usrp/dboard/db_sbx_version4.cpp
index 746de780b..5df243ea0 100644
--- a/host/lib/usrp/dboard/db_sbx_version4.cpp
+++ b/host/lib/usrp/dboard/db_sbx_version4.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 
diff --git a/host/lib/usrp/dboard/db_tvrx.cpp b/host/lib/usrp/dboard/db_tvrx.cpp
index bae047bbd..2cef30158 100644
--- a/host/lib/usrp/dboard/db_tvrx.cpp
+++ b/host/lib/usrp/dboard/db_tvrx.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 // No RX IO Pins Used
diff --git a/host/lib/usrp/dboard/db_tvrx2.cpp b/host/lib/usrp/dboard/db_tvrx2.cpp
index 2b5524069..aa4d3590e 100644
--- a/host/lib/usrp/dboard/db_tvrx2.cpp
+++ b/host/lib/usrp/dboard/db_tvrx2.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010,2012-2014,2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 // Common IO Pins
diff --git a/host/lib/usrp/dboard/db_twinrx.cpp b/host/lib/usrp/dboard/db_twinrx.cpp
index 254bb0344..d324ca105 100644
--- a/host/lib/usrp/dboard/db_twinrx.cpp
+++ b/host/lib/usrp/dboard/db_twinrx.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014-15 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "twinrx/twinrx_experts.hpp"
diff --git a/host/lib/usrp/dboard/db_ubx.cpp b/host/lib/usrp/dboard/db_ubx.cpp
index a144f1c75..474c78dec 100644
--- a/host/lib/usrp/dboard/db_ubx.cpp
+++ b/host/lib/usrp/dboard/db_ubx.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2014-17 Ettus Research, A National Instruments Company
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 /***********************************************************************
diff --git a/host/lib/usrp/dboard/db_unknown.cpp b/host/lib/usrp/dboard/db_unknown.cpp
index 1a63c9233..41b5248d5 100644
--- a/host/lib/usrp/dboard/db_unknown.cpp
+++ b/host/lib/usrp/dboard/db_unknown.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2011 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include <uhd/types/ranges.hpp>
diff --git a/host/lib/usrp/dboard/db_wbx_common.cpp b/host/lib/usrp/dboard/db_wbx_common.cpp
index 1f665b7e4..9584778d5 100644
--- a/host/lib/usrp/dboard/db_wbx_common.cpp
+++ b/host/lib/usrp/dboard/db_wbx_common.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "db_wbx_common.hpp"
diff --git a/host/lib/usrp/dboard/db_wbx_common.hpp b/host/lib/usrp/dboard/db_wbx_common.hpp
index a6b2ca852..4b9c834f5 100644
--- a/host/lib/usrp/dboard/db_wbx_common.hpp
+++ b/host/lib/usrp/dboard/db_wbx_common.hpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011,2013-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #ifndef INCLUDED_LIBUHD_USRP_DBOARD_DB_WBX_COMMON_HPP
diff --git a/host/lib/usrp/dboard/db_wbx_simple.cpp b/host/lib/usrp/dboard/db_wbx_simple.cpp
index 062e1294b..d2cf983fa 100644
--- a/host/lib/usrp/dboard/db_wbx_simple.cpp
+++ b/host/lib/usrp/dboard/db_wbx_simple.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 // Antenna constants
diff --git a/host/lib/usrp/dboard/db_wbx_version2.cpp b/host/lib/usrp/dboard/db_wbx_version2.cpp
index d50ae481b..56073846a 100644
--- a/host/lib/usrp/dboard/db_wbx_version2.cpp
+++ b/host/lib/usrp/dboard/db_wbx_version2.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "db_wbx_common.hpp"
diff --git a/host/lib/usrp/dboard/db_wbx_version3.cpp b/host/lib/usrp/dboard/db_wbx_version3.cpp
index 1863dcb44..c6d8615c7 100644
--- a/host/lib/usrp/dboard/db_wbx_version3.cpp
+++ b/host/lib/usrp/dboard/db_wbx_version3.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "db_wbx_common.hpp"
diff --git a/host/lib/usrp/dboard/db_wbx_version4.cpp b/host/lib/usrp/dboard/db_wbx_version4.cpp
index 9b31baf89..1e51b713e 100644
--- a/host/lib/usrp/dboard/db_wbx_version4.cpp
+++ b/host/lib/usrp/dboard/db_wbx_version4.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2011-2014 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "db_wbx_common.hpp"
diff --git a/host/lib/usrp/dboard/db_xcvr2450.cpp b/host/lib/usrp/dboard/db_xcvr2450.cpp
index fe6eca07b..5d3b7ceaa 100644
--- a/host/lib/usrp/dboard/db_xcvr2450.cpp
+++ b/host/lib/usrp/dboard/db_xcvr2450.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2010-2012 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 // TX IO Pins
diff --git a/host/lib/usrp/dboard/twinrx/twinrx_ctrl.hpp b/host/lib/usrp/dboard/twinrx/twinrx_ctrl.hpp
index 866a7c54d..d634722e4 100644
--- a/host/lib/usrp/dboard/twinrx/twinrx_ctrl.hpp
+++ b/host/lib/usrp/dboard/twinrx/twinrx_ctrl.hpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #ifndef INCLUDED_DBOARD_TWINRX_CTRL_HPP
diff --git a/host/lib/usrp/dboard/twinrx/twinrx_experts.cpp b/host/lib/usrp/dboard/twinrx/twinrx_experts.cpp
index c6a2d42c0..ad785a670 100644
--- a/host/lib/usrp/dboard/twinrx/twinrx_experts.cpp
+++ b/host/lib/usrp/dboard/twinrx/twinrx_experts.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "twinrx_experts.hpp"
diff --git a/host/lib/usrp/dboard/twinrx/twinrx_experts.hpp b/host/lib/usrp/dboard/twinrx/twinrx_experts.hpp
index 7b85137e1..92d4a9ca0 100644
--- a/host/lib/usrp/dboard/twinrx/twinrx_experts.hpp
+++ b/host/lib/usrp/dboard/twinrx/twinrx_experts.hpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #ifndef INCLUDED_DBOARD_TWINRX_EXPERTS_HPP
diff --git a/host/lib/usrp/dboard/twinrx/twinrx_gain_tables.cpp b/host/lib/usrp/dboard/twinrx/twinrx_gain_tables.cpp
index 783ded8cc..03ea4cdef 100644
--- a/host/lib/usrp/dboard/twinrx/twinrx_gain_tables.cpp
+++ b/host/lib/usrp/dboard/twinrx/twinrx_gain_tables.cpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #include "twinrx_gain_tables.hpp"
diff --git a/host/lib/usrp/dboard/twinrx/twinrx_gain_tables.hpp b/host/lib/usrp/dboard/twinrx/twinrx_gain_tables.hpp
index 8ebab4243..59d61f917 100644
--- a/host/lib/usrp/dboard/twinrx/twinrx_gain_tables.hpp
+++ b/host/lib/usrp/dboard/twinrx/twinrx_gain_tables.hpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2016 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #ifndef INCLUDED_DBOARD_TWINRX_GAIN_TABLES_HPP
diff --git a/host/lib/usrp/dboard/twinrx/twinrx_io.hpp b/host/lib/usrp/dboard/twinrx/twinrx_io.hpp
index 4fa5a22d5..6939a5a49 100644
--- a/host/lib/usrp/dboard/twinrx/twinrx_io.hpp
+++ b/host/lib/usrp/dboard/twinrx/twinrx_io.hpp
@@ -1,18 +1,7 @@
 //
 // Copyright 2015 Ettus Research LLC
 //
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+// SPDX-License-Identifier: GPL-3.0
 //
 
 #ifndef INCLUDED_DBOARD_TWINRX_IO_HPP