suse man page for spi_write

SPI_WRITE(9)						  Serial Peripheral Interface (S					      SPI_WRITE(9)

NAME
       spi_write - SPI synchronous write

SYNOPSIS
       int spi_write(struct spi_device * spi, const u8 * buf, size_t len);

ARGUMENTS
       spi
	   device to which data will be written

       buf
	   data buffer

       len
	   data buffer size

CONTEXT
       can sleep

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

COPYRIGHT
Kernel Hackers Manual 2.6.					     July 2010							      SPI_WRITE(9)