+#if defined(CONFIG_DTT_DS1775)
+#define DTT_READ_TEMP 0x0
+#define DTT_CONFIG 0x1
+#define DTT_TEMP_HYST 0x2
+#define DTT_TEMP_OS 0x3
+#endif
+
+#if defined(CONFIG_DTT_ADM1021)
+#define DTT_READ_LOC_VALUE 0x00
+#define DTT_READ_REM_VALUE 0x01
+#define DTT_READ_STATUS 0x02
+#define DTT_READ_CONFIG 0x03
+#define DTT_READ_CONVRATE 0x04
+#define DTT_READ_LOC_HIGHLIM 0x05
+#define DTT_READ_LOC_LOWLIM 0x06
+#define DTT_READ_REM_HIGHLIM 0x07
+#define DTT_READ_REM_LOWLIM 0x08
+#define DTT_READ_DEVID 0xfe
+
+#define DTT_WRITE_CONFIG 0x09
+#define DTT_WRITE_CONVRATE 0x0a
+#define DTT_WRITE_LOC_HIGHLIM 0x0b
+#define DTT_WRITE_LOC_LOWLIM 0x0c
+#define DTT_WRITE_REM_HIGHLIM 0x0d
+#define DTT_WRITE_REM_LOWLIM 0x0e
+#define DTT_WRITE_ONESHOT 0x0f
+
+#define DTT_STATUS_BUSY 0x80 /* 1=ADC Converting */
+#define DTT_STATUS_LHIGH 0x40 /* 1=Local High Temp Limit Tripped */
+#define DTT_STATUS_LLOW 0x20 /* 1=Local Low Temp Limit Tripped */
+#define DTT_STATUS_RHIGH 0x10 /* 1=Remote High Temp Limit Tripped */
+#define DTT_STATUS_RLOW 0x08 /* 1=Remote Low Temp Limit Tripped */
+#define DTT_STATUS_OPEN 0x04 /* 1=Remote Sensor Open-Circuit */
+
+#define DTT_CONFIG_ALERT_MASKED 0x80 /* 0=ALERT Enabled, 1=ALERT Masked */
+#define DTT_CONFIG_STANDBY 0x40 /* 0=Run, 1=Standby */
+
+#define DTT_ADM1021_DEVID 0x41
+#endif
+