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driver: spi: Modify core to compute the message length

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Make spi core calculate the message length while
populating the other transfer parameters.

Usecase, driver can use it to populate framelength filed in their
controller.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Sourav Poddar 2013-07-18 15:31:25 +05:30 committed by Mark Brown
parent ad81f0545e
commit 078726ce6d
2 changed files with 2 additions and 0 deletions
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1
drivers/spi/spi.c
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@ -1375,6 +1375,7 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message)
* it is not set for this transfer.
*/
list_for_each_entry(xfer, &message->transfers, transfer_list) {
message->frame_length += xfer->len;
if (!xfer->bits_per_word)
xfer->bits_per_word = spi->bits_per_word;
if (!xfer->speed_hz)

1
include/linux/spi/spi.h
View file

@ -578,6 +578,7 @@ struct spi_message {
/* completion is reported through a callback */
void (*complete)(void *context);
void *context;
unsigned frame_length;
unsigned actual_length;
int status;