diff --git a/src/soc/ibm/power9/pstates.c b/src/soc/ibm/power9/pstates.c
index a245baaccad..07b455f6782 100644
--- a/src/soc/ibm/power9/pstates.c
+++ b/src/soc/ibm/power9/pstates.c
@@ -58,7 +58,7 @@ static ResonantClockingSetup resclk =
 
 #define WOF_TABLES_MAGIC_VALUE (uint32_t)0x57465448 // "WFTH"
 #define WOF_TABLES_VERSION     (uint32_t)2
-#define WOF_TABLES_MAX_VERSION WOF_TABLES_VERSION 
+#define WOF_TABLES_MAX_VERSION WOF_TABLES_VERSION
 
 /*
  * WOF image:
@@ -241,7 +241,7 @@ static void check_valid_poundW(PoundW_data_per_quad *poundW_bucket,
 			    prev_vid_compare_per_quad[quad])
 				die("VID compare per quad is decreasing for quad %d\n", quad);
 
-			prev_vid_compare_per_quad[quad] = 
+			prev_vid_compare_per_quad[quad] =
 			        poundW_bucket->poundw[op].vdm_vid_compare_per_quad[quad];
 		}
 
@@ -829,7 +829,7 @@ void build_parameter_blocks(struct homer_st *homer, uint64_t functional_cores)
 	memcpy(gppb->operating_points, oppb->operating_points,
 	       sizeof(gppb->operating_points));
 	{
-		
+
 		memcpy(gppb->operating_points_set[VPD_PT_SET_RAW], oppb->operating_points,
 			   sizeof(gppb->operating_points));
 		memcpy(gppb->operating_points_set[VPD_PT_SET_SYSP], oppb->operating_points,
diff --git a/src/soc/ibm/power9/pstates_include/p9_pstates_cmeqm.h b/src/soc/ibm/power9/pstates_include/p9_pstates_cmeqm.h
index b97a2b79466..3991ffe556f 100644
--- a/src/soc/ibm/power9/pstates_include/p9_pstates_cmeqm.h
+++ b/src/soc/ibm/power9/pstates_include/p9_pstates_cmeqm.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
 /* IBM_PROLOG_BEGIN_TAG                                                   */
 /* This is an automatically generated prolog.                             */
 /*                                                                        */
diff --git a/src/soc/ibm/power9/pstates_include/p9_pstates_common.h b/src/soc/ibm/power9/pstates_include/p9_pstates_common.h
index eec4dbb425d..aeff0fa286c 100644
--- a/src/soc/ibm/power9/pstates_include/p9_pstates_common.h
+++ b/src/soc/ibm/power9/pstates_include/p9_pstates_common.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
 /* IBM_PROLOG_BEGIN_TAG                                                   */
 /* This is an automatically generated prolog.                             */
 /*                                                                        */
@@ -384,7 +386,7 @@ typedef struct __attribute__((packed, aligned(128))) WofTablesHeader
     /// Nest Frequency (in MHz) used in building the WOF Tables
     uint16_t nest_frequency_mhz;
 
-    /// Core Sort Power Target Frequency (in MHz) – The #V frequency associated
+    /// Core Sort Power Target Frequency (in MHz) - The #V frequency associated
     /// with the sort power target for this table set. This will be either the
     /// Nominal or Turbo #V frequency
     uint16_t sort_power_freq_mhz;
diff --git a/src/soc/ibm/power9/pstates_include/p9_pstates_occ.h b/src/soc/ibm/power9/pstates_include/p9_pstates_occ.h
index a523bf7dc68..32c132c9c44 100644
--- a/src/soc/ibm/power9/pstates_include/p9_pstates_occ.h
+++ b/src/soc/ibm/power9/pstates_include/p9_pstates_occ.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
 /* IBM_PROLOG_BEGIN_TAG                                                   */
 /* This is an automatically generated prolog.                             */
 /*                                                                        */
diff --git a/src/soc/ibm/power9/pstates_include/p9_pstates_pgpe.h b/src/soc/ibm/power9/pstates_include/p9_pstates_pgpe.h
index 1f22bf6b6a8..8472b82cb26 100644
--- a/src/soc/ibm/power9/pstates_include/p9_pstates_pgpe.h
+++ b/src/soc/ibm/power9/pstates_include/p9_pstates_pgpe.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
 /* IBM_PROLOG_BEGIN_TAG                                                   */
 /* This is an automatically generated prolog.                             */
 /*                                                                        */
diff --git a/src/soc/ibm/power9/pstates_include/readme.txt b/src/soc/ibm/power9/pstates_include/readme.txt
index 8e18b87f49e..0df53f1324c 100644
--- a/src/soc/ibm/power9/pstates_include/readme.txt
+++ b/src/soc/ibm/power9/pstates_include/readme.txt
@@ -1,5 +1,6 @@
 Files in this directory come from talos-hostboot repo, commit a2ddbf3 [1]. No
-changes were made, other than converting '#include <...>' to '#include "..."'.
+changes were made, other than converting '#include <...>' to '#include "..."'
+and adding SPDX licence identifiers.
 
 In some cases units mentioned in comments in the bigger structure are different
 than in comments above internal structure definitions and field names. An