+/* SPI Event/Mask register.
+*/
+#define SPI_EMASK 0x37 /* Event Mask */
+#define SPI_MME 0x20 /* Multi-Master Error */
+#define SPI_TXE 0x10 /* Transmit Error */
+#define SPI_BSY 0x04 /* Busy */
+#define SPI_TXB 0x02 /* Tx Buffer Empty */
+#define SPI_RXB 0x01 /* RX Buffer full/closed */
+
+#define SPI_STR 0x80 /* SPCOM: Start transmit */
+