diff options
Diffstat (limited to 'include/spi.h')
| -rw-r--r-- | include/spi.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/spi.h b/include/spi.h index 03dc5bc..3a55a68 100644 --- a/include/spi.h +++ b/include/spi.h @@ -24,6 +24,18 @@ #ifndef _SPI_H_ #define _SPI_H_ +/* SPI mode flags */ +#define SPI_CPHA 0x01 /* clock phase */ +#define SPI_CPOL 0x02 /* clock polarity */ +#define SPI_MODE_0 (0|0) /* (original MicroWire) */ +#define SPI_MODE_1 (0|SPI_CPHA) +#define SPI_MODE_2 (SPI_CPOL|0) +#define SPI_MODE_3 (SPI_CPOL|SPI_CPHA) +#define SPI_CS_HIGH 0x04 /* chipselect active high? */ +#define SPI_LSB_FIRST 0x08 /* per-word bits-on-wire */ +#define SPI_3WIRE 0x10 /* SI/SO signals shared */ +#define SPI_LOOP 0x20 /* loopback mode */ + /* * The function call pointer type used to drive the chip select. */ @@ -68,6 +80,8 @@ void spi_init(void); * * Returns: 0 on success, not 0 on failure */ -int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din); +int spi_xfer(spi_chipsel_type chipsel, int bitlen, uchar *dout, uchar *din); + +int spi_select(unsigned int bus, unsigned int dev, unsigned long mode); #endif /* _SPI_H_ */ |