From: Anton Vorontsov <avorontsov@ru.mvista.com>
Date: Tue, 31 Jul 2007 07:38:42 +0000 (-0700)
Subject: spi_mpc83xx: fix QE+LSB mode shifts
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=35cc0b975057389548bfe5703d438fe0deb4807e;p=linux-beck.git

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>
---

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;