spi_mpc83xx: fix QE+LSB mode shifts

spi_mpc83xx should use other shifts when running in QE+LSB mode.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c
index 18c475dd5709..72812bb9b40f 100644
--- a/drivers/spi/spi_mpc83xx.c
+++ b/drivers/spi/spi_mpc83xx.c
@@ -237,6 +237,14 @@ int mpc83xx_spi_setup_transfer(struct spi_device *spi, struct spi_transfer *t)
         } else
                 return -EINVAL;
 
+        if (mpc83xx_spi->qe_mode && spi->mode & SPI_LSB_FIRST) {
+                mpc83xx_spi->tx_shift = 0;
+                if (bits_per_word <= 8)
+                        mpc83xx_spi->rx_shift = 8;
+                else
+                        mpc83xx_spi->rx_shift = 0;
+        }
+
         /* nsecs = (clock period)/2 */
         if (!hz)
                 hz = spi->max_speed_hz;