Change to Apache 2.0 License (#1901)

58 files changed, 64 insertions, 52 deletions

diff --git a/src/main/scala/firrtl/passes/CInferMDir.scala b/src/main/scala/firrtl/passes/CInferMDir.scala
index 1fe8d57c..90f1c739 100644
--- a/src/main/scala/firrtl/passes/CInferMDir.scala
+++ b/src/main/scala/firrtl/passes/CInferMDir.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/CheckChirrtl.scala b/src/main/scala/firrtl/passes/CheckChirrtl.scala
index 97d614c1..472de13b 100644
--- a/src/main/scala/firrtl/passes/CheckChirrtl.scala
+++ b/src/main/scala/firrtl/passes/CheckChirrtl.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/CheckFlows.scala b/src/main/scala/firrtl/passes/CheckFlows.scala
index bc455a20..2816887f 100644
--- a/src/main/scala/firrtl/passes/CheckFlows.scala
+++ b/src/main/scala/firrtl/passes/CheckFlows.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/CheckHighForm.scala b/src/main/scala/firrtl/passes/CheckHighForm.scala
index 559c9060..5514741a 100644
--- a/src/main/scala/firrtl/passes/CheckHighForm.scala
+++ b/src/main/scala/firrtl/passes/CheckHighForm.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/CheckInitialization.scala b/src/main/scala/firrtl/passes/CheckInitialization.scala
index 96057831..896e21fc 100644
--- a/src/main/scala/firrtl/passes/CheckInitialization.scala
+++ b/src/main/scala/firrtl/passes/CheckInitialization.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/CheckTypes.scala b/src/main/scala/firrtl/passes/CheckTypes.scala
index 956c1134..bbccb353 100644
--- a/src/main/scala/firrtl/passes/CheckTypes.scala
+++ b/src/main/scala/firrtl/passes/CheckTypes.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/CheckWidths.scala b/src/main/scala/firrtl/passes/CheckWidths.scala
index f7fefa87..3f30e124 100644
--- a/src/main/scala/firrtl/passes/CheckWidths.scala
+++ b/src/main/scala/firrtl/passes/CheckWidths.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/CommonSubexpressionElimination.scala b/src/main/scala/firrtl/passes/CommonSubexpressionElimination.scala
index 55a9c53a..e70346d4 100644
--- a/src/main/scala/firrtl/passes/CommonSubexpressionElimination.scala
+++ b/src/main/scala/firrtl/passes/CommonSubexpressionElimination.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/ConvertFixedToSInt.scala b/src/main/scala/firrtl/passes/ConvertFixedToSInt.scala
index baf7d4d5..869cac3a 100644
--- a/src/main/scala/firrtl/passes/ConvertFixedToSInt.scala
+++ b/src/main/scala/firrtl/passes/ConvertFixedToSInt.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/ExpandConnects.scala b/src/main/scala/firrtl/passes/ExpandConnects.scala
index 4f849c5a..518068a1 100644
--- a/src/main/scala/firrtl/passes/ExpandConnects.scala
+++ b/src/main/scala/firrtl/passes/ExpandConnects.scala
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 package firrtl.passes
 
 import firrtl.Utils.{create_exps, flow, get_field, get_valid_points, times, to_flip, to_flow}
diff --git a/src/main/scala/firrtl/passes/ExpandWhens.scala b/src/main/scala/firrtl/passes/ExpandWhens.scala
index 14d5d3ef..7456d2ab 100644
--- a/src/main/scala/firrtl/passes/ExpandWhens.scala
+++ b/src/main/scala/firrtl/passes/ExpandWhens.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/InferBinaryPoints.scala b/src/main/scala/firrtl/passes/InferBinaryPoints.scala
index f393d8a5..8155462a 100644
--- a/src/main/scala/firrtl/passes/InferBinaryPoints.scala
+++ b/src/main/scala/firrtl/passes/InferBinaryPoints.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/InferTypes.scala b/src/main/scala/firrtl/passes/InferTypes.scala
index 4d14e7ff..bbc1ef6d 100644
--- a/src/main/scala/firrtl/passes/InferTypes.scala
+++ b/src/main/scala/firrtl/passes/InferTypes.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/InferWidths.scala b/src/main/scala/firrtl/passes/InferWidths.scala
index eae9690f..aa2095fa 100644
--- a/src/main/scala/firrtl/passes/InferWidths.scala
+++ b/src/main/scala/firrtl/passes/InferWidths.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/Inline.scala b/src/main/scala/firrtl/passes/Inline.scala
index 00cda739..4eba5d59 100644
--- a/src/main/scala/firrtl/passes/Inline.scala
+++ b/src/main/scala/firrtl/passes/Inline.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl
 package passes
diff --git a/src/main/scala/firrtl/passes/Legalize.scala b/src/main/scala/firrtl/passes/Legalize.scala
index 5d59e075..ef0e1706 100644
--- a/src/main/scala/firrtl/passes/Legalize.scala
+++ b/src/main/scala/firrtl/passes/Legalize.scala
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 package firrtl.passes
 
 import firrtl.PrimOps._
diff --git a/src/main/scala/firrtl/passes/LowerTypes.scala b/src/main/scala/firrtl/passes/LowerTypes.scala
index ad608cec..592caf5d 100644
--- a/src/main/scala/firrtl/passes/LowerTypes.scala
+++ b/src/main/scala/firrtl/passes/LowerTypes.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/PadWidths.scala b/src/main/scala/firrtl/passes/PadWidths.scala
index 79560605..875e80ae 100644
--- a/src/main/scala/firrtl/passes/PadWidths.scala
+++ b/src/main/scala/firrtl/passes/PadWidths.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl
 package passes
diff --git a/src/main/scala/firrtl/passes/Pass.scala b/src/main/scala/firrtl/passes/Pass.scala
index b5eac4ed..96b3b2ee 100644
--- a/src/main/scala/firrtl/passes/Pass.scala
+++ b/src/main/scala/firrtl/passes/Pass.scala
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 package firrtl.passes
 
 import firrtl.DependencyAPIMigration
diff --git a/src/main/scala/firrtl/passes/PullMuxes.scala b/src/main/scala/firrtl/passes/PullMuxes.scala
index 27543d63..ce9a8744 100644
--- a/src/main/scala/firrtl/passes/PullMuxes.scala
+++ b/src/main/scala/firrtl/passes/PullMuxes.scala
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 package firrtl.passes
 
 import firrtl.ir._
diff --git a/src/main/scala/firrtl/passes/RemoveAccesses.scala b/src/main/scala/firrtl/passes/RemoveAccesses.scala
index d8d32b26..f49af935 100644
--- a/src/main/scala/firrtl/passes/RemoveAccesses.scala
+++ b/src/main/scala/firrtl/passes/RemoveAccesses.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/RemoveCHIRRTL.scala b/src/main/scala/firrtl/passes/RemoveCHIRRTL.scala
index 624138ab..f8511820 100644
--- a/src/main/scala/firrtl/passes/RemoveCHIRRTL.scala
+++ b/src/main/scala/firrtl/passes/RemoveCHIRRTL.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/RemoveEmpty.scala b/src/main/scala/firrtl/passes/RemoveEmpty.scala
index eb25dcc4..a834b779 100644
--- a/src/main/scala/firrtl/passes/RemoveEmpty.scala
+++ b/src/main/scala/firrtl/passes/RemoveEmpty.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl
 package passes
diff --git a/src/main/scala/firrtl/passes/RemoveIntervals.scala b/src/main/scala/firrtl/passes/RemoveIntervals.scala
index 657b4356..3daec671 100644
--- a/src/main/scala/firrtl/passes/RemoveIntervals.scala
+++ b/src/main/scala/firrtl/passes/RemoveIntervals.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/RemoveValidIf.scala b/src/main/scala/firrtl/passes/RemoveValidIf.scala
index 7e82b37b..bc8e8c1b 100644
--- a/src/main/scala/firrtl/passes/RemoveValidIf.scala
+++ b/src/main/scala/firrtl/passes/RemoveValidIf.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl
 package passes
diff --git a/src/main/scala/firrtl/passes/ReplaceAccesses.scala b/src/main/scala/firrtl/passes/ReplaceAccesses.scala
index 4a3cd697..ab48c3db 100644
--- a/src/main/scala/firrtl/passes/ReplaceAccesses.scala
+++ b/src/main/scala/firrtl/passes/ReplaceAccesses.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/ResolveFlows.scala b/src/main/scala/firrtl/passes/ResolveFlows.scala
index 48b9479c..1af87c10 100644
--- a/src/main/scala/firrtl/passes/ResolveFlows.scala
+++ b/src/main/scala/firrtl/passes/ResolveFlows.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/ResolveKinds.scala b/src/main/scala/firrtl/passes/ResolveKinds.scala
index fcbac163..25be003d 100644
--- a/src/main/scala/firrtl/passes/ResolveKinds.scala
+++ b/src/main/scala/firrtl/passes/ResolveKinds.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/SplitExpressions.scala b/src/main/scala/firrtl/passes/SplitExpressions.scala
index a65f8921..1b4ed1cc 100644
--- a/src/main/scala/firrtl/passes/SplitExpressions.scala
+++ b/src/main/scala/firrtl/passes/SplitExpressions.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl
 package passes
diff --git a/src/main/scala/firrtl/passes/ToWorkingIR.scala b/src/main/scala/firrtl/passes/ToWorkingIR.scala
index 03faaf3c..2a814497 100644
--- a/src/main/scala/firrtl/passes/ToWorkingIR.scala
+++ b/src/main/scala/firrtl/passes/ToWorkingIR.scala
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 package firrtl.passes
 
 import firrtl.ir._
diff --git a/src/main/scala/firrtl/passes/TrimIntervals.scala b/src/main/scala/firrtl/passes/TrimIntervals.scala
index 0a05bd4e..99a97a38 100644
--- a/src/main/scala/firrtl/passes/TrimIntervals.scala
+++ b/src/main/scala/firrtl/passes/TrimIntervals.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/Uniquify.scala b/src/main/scala/firrtl/passes/Uniquify.scala
index 57ef11fa..81916282 100644
--- a/src/main/scala/firrtl/passes/Uniquify.scala
+++ b/src/main/scala/firrtl/passes/Uniquify.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/VerilogModulusCleanup.scala b/src/main/scala/firrtl/passes/VerilogModulusCleanup.scala
index 0b046a5f..baad2f4f 100644
--- a/src/main/scala/firrtl/passes/VerilogModulusCleanup.scala
+++ b/src/main/scala/firrtl/passes/VerilogModulusCleanup.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl
 package passes
diff --git a/src/main/scala/firrtl/passes/VerilogPrep.scala b/src/main/scala/firrtl/passes/VerilogPrep.scala
index eeb34fa9..ed5db92e 100644
--- a/src/main/scala/firrtl/passes/VerilogPrep.scala
+++ b/src/main/scala/firrtl/passes/VerilogPrep.scala
@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: Apache-2.0
+
 package firrtl.passes
 
 import firrtl.Utils.{create_exps, flow, kind, toWrappedExpression}
diff --git a/src/main/scala/firrtl/passes/ZeroLengthVecs.scala b/src/main/scala/firrtl/passes/ZeroLengthVecs.scala
index e61780a4..0c8e0fa7 100644
--- a/src/main/scala/firrtl/passes/ZeroLengthVecs.scala
+++ b/src/main/scala/firrtl/passes/ZeroLengthVecs.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/ZeroWidth.scala b/src/main/scala/firrtl/passes/ZeroWidth.scala
index 82321f95..60439ec1 100644
--- a/src/main/scala/firrtl/passes/ZeroWidth.scala
+++ b/src/main/scala/firrtl/passes/ZeroWidth.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/clocklist/ClockList.scala b/src/main/scala/firrtl/passes/clocklist/ClockList.scala
index bfc03b51..f4ddbf21 100644
--- a/src/main/scala/firrtl/passes/clocklist/ClockList.scala
+++ b/src/main/scala/firrtl/passes/clocklist/ClockList.scala
@@ -1,4 +1,4 @@
-// See license file for details
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package clocklist
diff --git a/src/main/scala/firrtl/passes/clocklist/ClockListTransform.scala b/src/main/scala/firrtl/passes/clocklist/ClockListTransform.scala
index 468ba905..a4461118 100644
--- a/src/main/scala/firrtl/passes/clocklist/ClockListTransform.scala
+++ b/src/main/scala/firrtl/passes/clocklist/ClockListTransform.scala
@@ -1,4 +1,4 @@
-// See license file for details
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package clocklist
diff --git a/src/main/scala/firrtl/passes/clocklist/ClockListUtils.scala b/src/main/scala/firrtl/passes/clocklist/ClockListUtils.scala
index 00e07588..9e0a202b 100644
--- a/src/main/scala/firrtl/passes/clocklist/ClockListUtils.scala
+++ b/src/main/scala/firrtl/passes/clocklist/ClockListUtils.scala
@@ -1,4 +1,4 @@
-// See license file for details
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package clocklist
diff --git a/src/main/scala/firrtl/passes/clocklist/RemoveAllButClocks.scala b/src/main/scala/firrtl/passes/clocklist/RemoveAllButClocks.scala
index d72bc293..9ad653cf 100644
--- a/src/main/scala/firrtl/passes/clocklist/RemoveAllButClocks.scala
+++ b/src/main/scala/firrtl/passes/clocklist/RemoveAllButClocks.scala
@@ -1,4 +1,4 @@
-// See license file for details
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package clocklist
diff --git a/src/main/scala/firrtl/passes/memlib/DecorateMems.scala b/src/main/scala/firrtl/passes/memlib/DecorateMems.scala
index d237c36a..1cdecdfa 100644
--- a/src/main/scala/firrtl/passes/memlib/DecorateMems.scala
+++ b/src/main/scala/firrtl/passes/memlib/DecorateMems.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl
 package passes
diff --git a/src/main/scala/firrtl/passes/memlib/InferReadWrite.scala b/src/main/scala/firrtl/passes/memlib/InferReadWrite.scala
index e290633e..0bb94452 100644
--- a/src/main/scala/firrtl/passes/memlib/InferReadWrite.scala
+++ b/src/main/scala/firrtl/passes/memlib/InferReadWrite.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/MemConf.scala b/src/main/scala/firrtl/passes/memlib/MemConf.scala
index 871a1093..637b57e0 100644
--- a/src/main/scala/firrtl/passes/memlib/MemConf.scala
+++ b/src/main/scala/firrtl/passes/memlib/MemConf.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/MemIR.scala b/src/main/scala/firrtl/passes/memlib/MemIR.scala
index c8cd3e8d..881aefed 100644
--- a/src/main/scala/firrtl/passes/memlib/MemIR.scala
+++ b/src/main/scala/firrtl/passes/memlib/MemIR.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/MemLibOptions.scala b/src/main/scala/firrtl/passes/memlib/MemLibOptions.scala
index 1db132f7..186ca78c 100644
--- a/src/main/scala/firrtl/passes/memlib/MemLibOptions.scala
+++ b/src/main/scala/firrtl/passes/memlib/MemLibOptions.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes.memlib
 
diff --git a/src/main/scala/firrtl/passes/memlib/MemTransformUtils.scala b/src/main/scala/firrtl/passes/memlib/MemTransformUtils.scala
index f153fa2b..429ce19f 100644
--- a/src/main/scala/firrtl/passes/memlib/MemTransformUtils.scala
+++ b/src/main/scala/firrtl/passes/memlib/MemTransformUtils.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/MemUtils.scala b/src/main/scala/firrtl/passes/memlib/MemUtils.scala
index f325c0ba..a5bb26a0 100644
--- a/src/main/scala/firrtl/passes/memlib/MemUtils.scala
+++ b/src/main/scala/firrtl/passes/memlib/MemUtils.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 
diff --git a/src/main/scala/firrtl/passes/memlib/RenameAnnotatedMemoryPorts.scala b/src/main/scala/firrtl/passes/memlib/RenameAnnotatedMemoryPorts.scala
index 30529119..43a46bf1 100644
--- a/src/main/scala/firrtl/passes/memlib/RenameAnnotatedMemoryPorts.scala
+++ b/src/main/scala/firrtl/passes/memlib/RenameAnnotatedMemoryPorts.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/ReplaceMemMacros.scala b/src/main/scala/firrtl/passes/memlib/ReplaceMemMacros.scala
index fc381e88..63ae0490 100644
--- a/src/main/scala/firrtl/passes/memlib/ReplaceMemMacros.scala
+++ b/src/main/scala/firrtl/passes/memlib/ReplaceMemMacros.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/ReplaceMemTransform.scala b/src/main/scala/firrtl/passes/memlib/ReplaceMemTransform.scala
index c88d6ba7..f0325e8e 100644
--- a/src/main/scala/firrtl/passes/memlib/ReplaceMemTransform.scala
+++ b/src/main/scala/firrtl/passes/memlib/ReplaceMemTransform.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/ResolveMaskGranularity.scala b/src/main/scala/firrtl/passes/memlib/ResolveMaskGranularity.scala
index 434c7602..7a1a57fb 100644
--- a/src/main/scala/firrtl/passes/memlib/ResolveMaskGranularity.scala
+++ b/src/main/scala/firrtl/passes/memlib/ResolveMaskGranularity.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/ResolveMemoryReference.scala b/src/main/scala/firrtl/passes/memlib/ResolveMemoryReference.scala
index e80e0c4a..73aa5399 100644
--- a/src/main/scala/firrtl/passes/memlib/ResolveMemoryReference.scala
+++ b/src/main/scala/firrtl/passes/memlib/ResolveMemoryReference.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/ToMemIR.scala b/src/main/scala/firrtl/passes/memlib/ToMemIR.scala
index 9fe7f852..d17f0d59 100644
--- a/src/main/scala/firrtl/passes/memlib/ToMemIR.scala
+++ b/src/main/scala/firrtl/passes/memlib/ToMemIR.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/VerilogMemDelays.scala b/src/main/scala/firrtl/passes/memlib/VerilogMemDelays.scala
index a2b14343..1cecf543 100644
--- a/src/main/scala/firrtl/passes/memlib/VerilogMemDelays.scala
+++ b/src/main/scala/firrtl/passes/memlib/VerilogMemDelays.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/memlib/YamlUtils.scala b/src/main/scala/firrtl/passes/memlib/YamlUtils.scala
index b5f91e7b..99344973 100644
--- a/src/main/scala/firrtl/passes/memlib/YamlUtils.scala
+++ b/src/main/scala/firrtl/passes/memlib/YamlUtils.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package memlib
diff --git a/src/main/scala/firrtl/passes/wiring/Wiring.scala b/src/main/scala/firrtl/passes/wiring/Wiring.scala
index a69b7797..45eb61bf 100644
--- a/src/main/scala/firrtl/passes/wiring/Wiring.scala
+++ b/src/main/scala/firrtl/passes/wiring/Wiring.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package wiring
diff --git a/src/main/scala/firrtl/passes/wiring/WiringTransform.scala b/src/main/scala/firrtl/passes/wiring/WiringTransform.scala
index d6658f16..4f6705ec 100644
--- a/src/main/scala/firrtl/passes/wiring/WiringTransform.scala
+++ b/src/main/scala/firrtl/passes/wiring/WiringTransform.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package wiring
diff --git a/src/main/scala/firrtl/passes/wiring/WiringUtils.scala b/src/main/scala/firrtl/passes/wiring/WiringUtils.scala
index 59b042f5..0b121cc0 100644
--- a/src/main/scala/firrtl/passes/wiring/WiringUtils.scala
+++ b/src/main/scala/firrtl/passes/wiring/WiringUtils.scala
@@ -1,4 +1,4 @@
-// See LICENSE for license details.
+// SPDX-License-Identifier: Apache-2.0
 
 package firrtl.passes
 package wiring