diff --git a/src/soc/amd/common/block/lpc/lpc.c b/src/soc/amd/common/block/lpc/lpc.c
index 0eda7f2fd8..68e1fce960 100644
--- a/src/soc/amd/common/block/lpc/lpc.c
+++ b/src/soc/amd/common/block/lpc/lpc.c
@@ -117,8 +117,7 @@ static void lpc_read_resources(struct device *dev)
 		     IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 
 	/* Add a memory resource for the SPI BAR. */
-	fixed_mem_resource_kb(dev, 2, SPI_BASE_ADDRESS / KiB, 1,
-			IORESOURCE_SUBTRACTIVE);
+	mmio_range(dev, 2, SPI_BASE_ADDRESS, 1 * KiB);
 
 	res = new_resource(dev, 3); /* IOAPIC */
 	res->base = IO_APIC_ADDR;
diff --git a/src/southbridge/amd/agesa/hudson/lpc.c b/src/southbridge/amd/agesa/hudson/lpc.c
index f6e256bba1..fd710ab861 100644
--- a/src/southbridge/amd/agesa/hudson/lpc.c
+++ b/src/southbridge/amd/agesa/hudson/lpc.c
@@ -95,7 +95,7 @@ static void hudson_lpc_read_resources(struct device *dev)
 		     IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 
 	/* Add a memory resource for the SPI BAR. */
-	fixed_mem_resource_kb(dev, 2, SPI_BASE_ADDRESS / 1024, 1, IORESOURCE_SUBTRACTIVE);
+	mmio_range(dev, 2, SPI_BASE_ADDRESS, 1 * KiB);
 
 	res = new_resource(dev, 3); /* IOAPIC */
 	res->base = IO_APIC_ADDR;
diff --git a/src/southbridge/amd/cimx/sb800/lpc.c b/src/southbridge/amd/cimx/sb800/lpc.c
index c70ffdb060..12a21d2f36 100644
--- a/src/southbridge/amd/cimx/sb800/lpc.c
+++ b/src/southbridge/amd/cimx/sb800/lpc.c
@@ -29,7 +29,7 @@ void lpc_read_resources(struct device *dev)
 		     IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 
 	/* Add a memory resource for the SPI BAR. */
-	fixed_mem_resource_kb(dev, 2, SPI_BASE_ADDRESS / 1024, 1, IORESOURCE_SUBTRACTIVE);
+	mmio_range(dev, 2, SPI_BASE_ADDRESS, 1 * KiB);
 
 	res = new_resource(dev, 3);
 	res->base = IO_APIC_ADDR;
diff --git a/src/southbridge/amd/pi/hudson/lpc.c b/src/southbridge/amd/pi/hudson/lpc.c
index e672ecef60..9febc16f7b 100644
--- a/src/southbridge/amd/pi/hudson/lpc.c
+++ b/src/southbridge/amd/pi/hudson/lpc.c
@@ -103,7 +103,7 @@ static void hudson_lpc_read_resources(struct device *dev)
 		     IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
 
 	/* Add a memory resource for the SPI BAR. */
-	fixed_mem_resource_kb(dev, 2, SPI_BASE_ADDRESS / 1024, 1, IORESOURCE_SUBTRACTIVE);
+	mmio_range(dev, 2, SPI_BASE_ADDRESS, 1 * KiB);
 
 	res = new_resource(dev, 3); /* IOAPIC */
 	res->base = IO_APIC_ADDR;