spi_read(9) centos man page | unix.com

SPI_READ(9)						  Serial Peripheral Interface (S					       SPI_READ(9)

NAME
       spi_read - SPI synchronous read

SYNOPSIS
       int spi_read(struct spi_device * spi, void * buf, size_t len);

ARGUMENTS
       spi
	   device from which data will be read

       buf
	   data buffer

       len
	   data buffer size

CONTEXT
       can sleep

DESCRIPTION
       This reads the buffer and returns zero or a negative error code. Callable only from contexts that can sleep.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014							       SPI_READ(9)