diff options
| -rw-r--r-- | include/linux/spi/spi.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 8c62ba74dd91..e766e0e2fe58 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -282,10 +282,12 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv) * @prepare_message: set up the controller to transfer a single message, * for example doing DMA mapping. Called from threaded * context. - * @transfer_one: transfer a single spi_transfer. When the - * driver is finished with this transfer it must call - * spi_finalize_current_transfer() so the subsystem can issue - * the next transfer + * @transfer_one: transfer a single spi_transfer. + * - return 0 if the transfer is finished, + * - return 1 if the transfer is still in progress. When + * the driver is finished with this transfer it must + * call spi_finalize_current_transfer() so the subsystem + * can issue the next transfer * @unprepare_message: undo any work done by prepare_message(). * @cs_gpios: Array of GPIOs to use as chip select lines; one per CS * number. Any individual value may be -ENOENT for CS lines that |