Merge remote-tracking branch 'spi/topic/dma' into spi-next

[cascardo/linux.git] / include / linux / spi / spi.h

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 0c23c83..36c86ef 100644 (file)
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -277,7 +277,7 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  *     message while queuing transfers that arrive in the meantime. When the
  *     driver is finished with this message, it must call
  *     spi_finalize_current_message() so the subsystem can issue the next
- *     transfer
+ *     message
  * @unprepare_transfer_hardware: there are currently no more messages on the
  *     queue so the subsystem notifies the driver that it may relax the
  *     hardware by issuing this call
@@ -291,7 +291,10 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
  *                  - 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