SPI_W8R8(9) Serial Peripheral Interface (S SPI_W8R8(9)
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
CONTEXT
can sleep
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.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 SPI_W8R8(9)
