#define LPC_SSP_FRAME_SPI (0x00 << 4)
#define LPC_SSP_FRAME_TI (0x01 << 4)
#define LPC_SSP_FRAME_MICROWIRE (0x02 << 4)
-#define LPC_SSP_SPI_CLK_LOW (0x00 << 6)
+#define LPC_SSP_SPI_CLK_LOW (0x00 << 6) /* CPOL : Clock Polarity */
#define LPC_SSP_SPI_CLK_HIGH (0x01 << 6)
-#define LPC_SSP_SPI_CLK_FIRST (0x00 << 7)
+#define LPC_SSP_SPI_CLK_FIRST (0x00 << 7) /* CPHA : Clock out Phase */
#define LPC_SSP_SPI_CLK_LAST (0x01 << 7)
#define LPC_SSP_SPI_CLK_RATE_DIV(x) (((x) & 0xFF) << 8)
/* SSP Control 1 register */