diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
index 6e5ffca..24832ab 100644
--- a/drivers/char/tpm/tpm_nsc.c
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -22,34 +22,42 @@
 #include "tpm.h"
 
 /* National definitions */
-#define	TPM_NSC_BASE			0x360
-#define	TPM_NSC_IRQ			0x07
+enum tpm_nsc_addr {
+	TPM_NSC_BASE = 0x360,
+	TPM_NSC_IRQ = 0x07
+};
 
-#define	NSC_LDN_INDEX			0x07
-#define	NSC_SID_INDEX			0x20
-#define	NSC_LDC_INDEX			0x30
-#define	NSC_DIO_INDEX			0x60
-#define	NSC_CIO_INDEX			0x62
-#define	NSC_IRQ_INDEX			0x70
-#define	NSC_ITS_INDEX			0x71
+enum tpm_nsc_index {
+	NSC_LDN_INDEX = 0x07,
+	NSC_SID_INDEX = 0x20,
+	NSC_LDC_INDEX = 0x30,
+	NSC_DIO_INDEX = 0x60,
+	NSC_CIO_INDEX = 0x62,
+	NSC_IRQ_INDEX = 0x70,
+	NSC_ITS_INDEX = 0x71
+};
 
-#define	NSC_STATUS			0x01
-#define	NSC_COMMAND			0x01
-#define	NSC_DATA			0x00
+enum tpm_nsc_status_loc {
+	NSC_STATUS = 0x01,
+	NSC_COMMAND = 0x01,
+	NSC_DATA = 0x00
+};
 
 /* status bits */
-#define	NSC_STATUS_OBF			0x01	/* output buffer full */
-#define	NSC_STATUS_IBF			0x02	/* input buffer full */
-#define	NSC_STATUS_F0			0x04	/* F0 */
-#define	NSC_STATUS_A2			0x08	/* A2 */
-#define	NSC_STATUS_RDY			0x10	/* ready to receive command */
-#define	NSC_STATUS_IBR			0x20	/* ready to receive data */
-
+enum tpm_nsc_status{
+	NSC_STATUS_OBF = 0x01,	/* output buffer full */
+	NSC_STATUS_IBF = 0x02,	/* input buffer full */
+	NSC_STATUS_F0 = 0x04,	/* F0 */
+	NSC_STATUS_A2 = 0x08,	/* A2 */
+	NSC_STATUS_RDY = 0x10,	/* ready to receive command */
+	NSC_STATUS_IBR = 0x20	/* ready to receive data */
+};
 /* command bits */
-#define	NSC_COMMAND_NORMAL		0x01	/* normal mode */
-#define	NSC_COMMAND_EOC			0x03
-#define	NSC_COMMAND_CANCEL		0x22
-
+enum tpm_nsc_cmd_mode {
+	NSC_COMMAND_NORMAL = 0x01,	/* normal mode */
+	NSC_COMMAND_EOC = 0x03,
+	NSC_COMMAND_CANCEL = 0x22
+};
 /*
  * Wait for a certain status to appear
  */