1. NAME▲

spi_w8r8 - SPI synchronous 8 bit write followed by 8 bit read

2. SYNOPSIS ▲

ssize_t spi_w8r8(struct spi_device *  spi , u8  cmd );

3. ARGUMENTS ▲

spi
    device with which data will be exchanged

cmd
    command to be written before data is read back

4. CONTEXT ▲

can sleep

5. 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.

6. COPYRIGHT ▲