driver: spi: Modify core to compute the message length

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>

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 978dda2c523982f62c676573feb1955da0ca82da..7e3446cab72fab90bc1566866bccf2e35dd9685b 100644 (file)
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -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)

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 28e440be1c07aafaa4ac62470344b052f9107d8f..aadd0a885a0f80221e7d5ea5a5ca57a2983d05db 100644 (file)
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -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;