diff options
Diffstat (limited to 'src/include/spi-generic.h')
| -rw-r--r-- | src/include/spi-generic.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/include/spi-generic.h b/src/include/spi-generic.h index c8b209da21..b4a10af0c0 100644 --- a/src/include/spi-generic.h +++ b/src/include/spi-generic.h @@ -21,15 +21,33 @@ /* Controller-specific definitions: */ +struct spi_ctrlr; + /*----------------------------------------------------------------------- * Representation of a SPI slave, i.e. what we're communicating with. * * bus: ID of the bus that the slave is attached to. * cs: ID of the chip select connected to the slave. + * ctrlr: Pointer to SPI controller structure. */ struct spi_slave { unsigned int bus; unsigned int cs; + const struct spi_ctrlr *ctrlr; +}; + +/*----------------------------------------------------------------------- + * Representation of a SPI contoller. + * + * claim_bus: Claim SPI bus and prepare for communication. + * release_bus: Release SPI bus. + * xfer: SPI transfer + */ +struct spi_ctrlr { + int (*claim_bus)(const struct spi_slave *slave); + void (*release_bus)(const struct spi_slave *slave); + int (*xfer)(const struct spi_slave *slave, const void *dout, + size_t bytesout, void *din, size_t bytesin); }; /*----------------------------------------------------------------------- |