diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/spi-generic.h | 24 |
1 files changed, 7 insertions, 17 deletions
diff --git a/src/include/spi-generic.h b/src/include/spi-generic.h index b7a14f9342..6c62de6d1d 100644 --- a/src/include/spi-generic.h +++ b/src/include/spi-generic.h @@ -120,27 +120,17 @@ void spi_release_bus(struct spi_slave *slave); /*----------------------------------------------------------------------- * SPI transfer * - * This writes "bitlen" bits out the SPI MOSI port and simultaneously clocks - * "bitlen" bits in the SPI MISO port. That's just the way SPI works. - * - * The source of the outgoing bits is the "dout" parameter and the - * destination of the input bits is the "din" parameter. Note that "dout" - * and "din" can point to the same memory location, in which case the - * input data overwrites the output data (since both are buffered by - * temporary variables, this is OK). - * * spi_xfer() interface: * slave: The SPI slave which will be sending/receiving the data. - * dout: Pointer to a string of bits to send out. The bits are - * held in a byte array and are sent MSB first. - * bitsout: How many bits to write. - * din: Pointer to a string of bits that will be filled in. - * bitsin: How many bits to read. + * dout: Pointer to a string of bytes to send out. + * bytesout: How many bytes to write. + * din: Pointer to a string of bytes that will be filled in. + * bytesin: How many bytes to read. * * Returns: 0 on success, not 0 on failure */ -int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bitsout, - void *din, unsigned int bitsin); +int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bytesout, + void *din, unsigned int bytesin); /*----------------------------------------------------------------------- * Determine if a SPI chipselect is valid. @@ -196,7 +186,7 @@ static inline int spi_w8r8(struct spi_slave *slave, unsigned char byte) dout[0] = byte; dout[1] = 0; - ret = spi_xfer(slave, dout, 16, din, 16); + ret = spi_xfer(slave, dout, 2, din, 2); return ret < 0 ? ret : din[1]; } |