diff --git a/src/soc/amd/common/block/include/amdblocks/lpc.h b/src/soc/amd/common/block/include/amdblocks/lpc.h
index 024d479561..c5f3c78821 100644
--- a/src/soc/amd/common/block/include/amdblocks/lpc.h
+++ b/src/soc/amd/common/block/include/amdblocks/lpc.h
@@ -67,18 +67,6 @@
 #define     LPC_SELECT_SIO_2E2F		0
 #define   WIDEIO_RANGE_ERROR		-1
 
-/* Assuming word access to higher word (register 0x4a) */
-#define LPC_IO_OR_MEM_DEC_EN_HIGH	0x4a
-#define   LPC_WIDEIO2_ENABLE_H		BIT(9)
-#define   LPC_WIDEIO1_ENABLE_H		BIT(8)
-#define   DECODE_IO_PORT_ENABLE6_H	BIT(7)
-#define   DECODE_IO_PORT_ENABLE5_H	BIT(6)
-#define   DECODE_IO_PORT_ENABLE4_H	BIT(5)
-#define   DECODE_IO_PORT_ENABLE3_H	BIT(3)
-#define   DECODE_IO_PORT_ENABLE2_H	BIT(2)
-#define   DECODE_IO_PORT_ENABLE1_H	BIT(1)
-#define   DECODE_IO_PORT_ENABLE0_H	BIT(0)
-
 #define LPC_MEM_PORT1			0x4c
 #define ROM_PROTECT_RANGE0		0x50
 #define   ROM_BASE_MASK			0xfffff000		/* bits 31-12 */
diff --git a/src/soc/amd/common/block/lpc/lpc_util.c b/src/soc/amd/common/block/lpc/lpc_util.c
index c40a198493..72919598a3 100644
--- a/src/soc/amd/common/block/lpc/lpc_util.c
+++ b/src/soc/amd/common/block/lpc/lpc_util.c
@@ -138,11 +138,11 @@ int lpc_set_wideio_range(uint16_t start, uint16_t size)
 
 void lpc_enable_port80(void)
 {
-	u8 byte;
+	uint32_t tmp;
 
-	byte = pci_read_config8(_LPCB_DEV, LPC_IO_OR_MEM_DEC_EN_HIGH);
-	byte |= DECODE_IO_PORT_ENABLE4_H;
-	pci_write_config8(_LPCB_DEV, LPC_IO_OR_MEM_DEC_EN_HIGH, byte);
+	tmp = pci_read_config32(_LPCB_DEV, LPC_IO_OR_MEM_DECODE_ENABLE);
+	tmp |= DECODE_IO_PORT_ENABLE4;
+	pci_write_config32(_LPCB_DEV, LPC_IO_OR_MEM_DECODE_ENABLE, tmp);
 }
 
 void lpc_enable_sio_decode(const bool addr)