spi: spi.h: clarify the documentation of transfer_one Explicitly note the transfer_one and transfer_one_message are mutually exclusive, to make the text a little more newcomers friendly. Signed-off-by: Baruch Siach <[email protected]> Signed-off-by: Mark Brown <[email protected]>
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index a1d4ca2..ad050f0 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h
@@ -287,7 +287,10 @@ * - 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 + * can issue the next transfer. Note: transfer_one and + * transfer_one_message are mutually exclusive; when both + * are set, the generic subsystem does not call your + * transfer_one callback. * @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