ad7879: fix spi word size to 16 bit

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>

 drivers/input/touchscreen/ad7879-spi.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/drivers/input/touchscreen/ad7879-spi.c

b/drivers/input/touchscreen/ad7879-spi.c
index 9fa8e5d..59c6e68 100644

--- a/drivers/input/touchscreen/ad7879-spi.c
+++ b/drivers/input/touchscreen/ad7879-spi.c

@@ -134,6 +134,7 @@ static const struct ad7879_bus_ops

ad7879_spi_bus_ops = {
 static int __devinit ad7879_spi_probe(struct spi_device *spi)
 {
 	struct ad7879 *ts;
+	int err;
 
 	/* don't exceed max specified SPI CLK frequency */
 	if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {

@@ -141,6 +142,13 @@ static int __devinit ad7879_spi_probe(struct

spi_device *spi)
 		return -EINVAL;
 	}
 
+	spi->bits_per_word = 16;
+	err = spi_setup(spi);
+	if (err) {
+	        dev_dbg(&spi->dev, "spi master doesn't support 16 bits/word
\n");
+	        return err;
+	}
+
 	ts = ad7879_probe(&spi->dev, AD7879_DEVID, spi->irq,
&ad7879_spi_bus_ops);
 	if (IS_ERR(ts))
 		return PTR_ERR(ts);