blob: 6d2de15f15fb4df4fba7300b72b481a137881962 [file] [log] [blame]
#include_next <linux/spi/spi.h>
#ifndef module_spi_driver
* module_spi_driver() - Helper macro for registering a SPI driver
* @__spi_driver: spi_driver struct
* Helper macro for SPI drivers which do not do anything special in module
* init/exit. This eliminates a lot of boilerplate. Each module may only
* use this macro once, and calling it replaces module_init() and module_exit()
#define module_spi_driver(__spi_driver) \
module_driver(__spi_driver, spi_register_driver, \
* spi_message_init_with_transfers - Initialize spi_message and append transfers
* @m: spi_message to be initialized
* @xfers: An array of spi transfers
* @num_xfers: Number of items in the xfer array
* This function initializes the given spi_message and adds each spi_transfer in
* the given array to the message.
#define spi_message_init_with_transfers LINUX_BACKPORT(spi_message_init_with_transfers)
static inline void
spi_message_init_with_transfers(struct spi_message *m,
struct spi_transfer *xfers, unsigned int num_xfers)
unsigned int i;
for (i = 0; i < num_xfers; ++i)
spi_message_add_tail(&xfers[i], m);
* spi_sync_transfer - synchronous SPI data transfer
* @spi: device with which data will be exchanged
* @xfers: An array of spi_transfers
* @num_xfers: Number of items in the xfer array
* Context: can sleep
* Does a synchronous SPI data transfer of the given spi_transfer array.
* For more specific semantics see spi_sync().
* It returns zero on success, else a negative error code.
#define spi_sync_transfer LINUX_BACKPORT(spi_sync_transfer)
static inline int
spi_sync_transfer(struct spi_device *spi, struct spi_transfer *xfers,
unsigned int num_xfers)
struct spi_message msg;
spi_message_init_with_transfers(&msg, xfers, num_xfers);
return spi_sync(spi, &msg);
#endif /* < 3.9 */