spi_sync_transfer() and spi_message_init_with_transfers() are used by the st-nci nfc driver.
Signed-off-by: Hauke Mehrtens <[email protected]> --- backport/backport-include/linux/spi/spi.h | 49 +++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) diff --git a/backport/backport-include/linux/spi/spi.h b/backport/backport-include/linux/spi/spi.h index 672cf5b..76fd8a2 100644 --- a/backport/backport-include/linux/spi/spi.h +++ b/backport/backport-include/linux/spi/spi.h @@ -17,4 +17,53 @@ spi_unregister_driver) #endif + +#if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0) +/** + * 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; + + spi_message_init(m); + 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 */ + #endif /* _BACKPORTS_LINUX_SPI_H */ -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe backports" in
