diff --git a/src/soc/amd/cezanne/include/soc/iomap.h b/src/soc/amd/cezanne/include/soc/iomap.h
index e4fe00fb1b..9c900e7be9 100644
--- a/src/soc/amd/cezanne/include/soc/iomap.h
+++ b/src/soc/amd/cezanne/include/soc/iomap.h
@@ -4,7 +4,6 @@
 #define AMD_CEZANNE_IOMAP_H
 
 #define I2C_MASTER_DEV_COUNT		4
-#define I2C_MASTER_START_INDEX		0
 #define I2C_PERIPHERAL_DEV_COUNT	0 /* TODO: Only master for now. */
 #define I2C_CTRLR_COUNT			(I2C_MASTER_DEV_COUNT + I2C_PERIPHERAL_DEV_COUNT)
 
diff --git a/src/soc/amd/glinda/include/soc/iomap.h b/src/soc/amd/glinda/include/soc/iomap.h
index 30fff9fbaa..029dd1c0d0 100644
--- a/src/soc/amd/glinda/include/soc/iomap.h
+++ b/src/soc/amd/glinda/include/soc/iomap.h
@@ -6,7 +6,6 @@
 #define AMD_GLINDA_IOMAP_H
 
 #define I2C_MASTER_DEV_COUNT		4
-#define I2C_MASTER_START_INDEX		0
 #define I2C_PERIPHERAL_DEV_COUNT	0 /* TODO: Only master for now. */
 #define I2C_CTRLR_COUNT			(I2C_MASTER_DEV_COUNT + I2C_PERIPHERAL_DEV_COUNT)
 
diff --git a/src/soc/amd/mendocino/include/soc/iomap.h b/src/soc/amd/mendocino/include/soc/iomap.h
index 859dfd5e9c..d70773dfce 100644
--- a/src/soc/amd/mendocino/include/soc/iomap.h
+++ b/src/soc/amd/mendocino/include/soc/iomap.h
@@ -4,7 +4,6 @@
 #define AMD_MENDOCINO_IOMAP_H
 
 #define I2C_MASTER_DEV_COUNT		4
-#define I2C_MASTER_START_INDEX		0
 #define I2C_PERIPHERAL_DEV_COUNT	0 /* TODO: Only master for now. */
 #define I2C_CTRLR_COUNT			(I2C_MASTER_DEV_COUNT + I2C_PERIPHERAL_DEV_COUNT)
 
diff --git a/src/soc/amd/phoenix/include/soc/iomap.h b/src/soc/amd/phoenix/include/soc/iomap.h
index 5e2c7c3dd9..0b93057ce7 100644
--- a/src/soc/amd/phoenix/include/soc/iomap.h
+++ b/src/soc/amd/phoenix/include/soc/iomap.h
@@ -4,7 +4,6 @@
 #define AMD_PHOENIX_IOMAP_H
 
 #define I2C_MASTER_DEV_COUNT		4
-#define I2C_MASTER_START_INDEX		0
 #define I2C_PERIPHERAL_DEV_COUNT	0 /* TODO: Only master for now. */
 #define I2C_CTRLR_COUNT			(I2C_MASTER_DEV_COUNT + I2C_PERIPHERAL_DEV_COUNT)
 
diff --git a/src/soc/amd/picasso/include/soc/iomap.h b/src/soc/amd/picasso/include/soc/iomap.h
index 26022ef032..be1cd4e275 100644
--- a/src/soc/amd/picasso/include/soc/iomap.h
+++ b/src/soc/amd/picasso/include/soc/iomap.h
@@ -33,7 +33,6 @@
  * I2C0 and I2C1 even though they are not functional.
  */
 #define I2C_MASTER_DEV_COUNT		4
-#define I2C_MASTER_START_INDEX		2
 #define I2C_PERIPHERAL_DEV_COUNT	1
 #define I2C_CTRLR_COUNT			(I2C_MASTER_DEV_COUNT + I2C_PERIPHERAL_DEV_COUNT)