Name
spi_w8r8 —
SPI synchronous 8 bit write followed by 8 bit read
Synopsis
ssize_t spi_w8r8 ( | struct spi_device * | spi, |
| | u8 | cmd); |
Arguments
spi
device with which data will be exchanged
cmd
command to be written before data is read back
Description
This returns the (unsigned) eight bit number returned by the
device, or else a negative error code. Callable only from
contexts that can sleep.