spi: Add support for preamble bytes

[oweals/u-boot.git] / include / spi.h

diff --git a/include/spi.h b/include/spi.h
index 3fe2e1eab2defc568079cd8a035225bbf682b18d..1638b503945071c9ccbd5486a870ac1814160779 100644 (file)
--- a/include/spi.h
+++ b/include/spi.h
@@ -37,11 +37,16 @@
 #define        SPI_LSB_FIRST   0x08                    /* per-word bits-on-wire */
 #define        SPI_3WIRE       0x10                    /* SI/SO signals shared */
 #define        SPI_LOOP        0x20                    /* loopback mode */
+#define        SPI_SLAVE       0x40                    /* slave mode */
+#define        SPI_PREAMBLE    0x80                    /* Skip preamble bytes */
 
 /* SPI transfer flags */
 #define SPI_XFER_BEGIN 0x01                    /* Assert CS before transfer */
 #define SPI_XFER_END   0x02                    /* Deassert CS after transfer */
 
+/* Header byte that marks the start of the message */
+#define SPI_PREAMBLE_END_BYTE  0xec
+
 /*-----------------------------------------------------------------------
  * Representation of a SPI slave, i.e. what we're communicating with.
  *