backlight: tdo24m: ensure chip select changes between transfers

Some SPI host drivers do not change chip select betwen transfers unless
.cs_chnage field is explicitly set. The LCD spec requires chip select
change between consecuitive transfers, so ensure it at the SPI driver
level.

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c
index bbfb502add6717832a6675883be3722afd879907..4a3d46e08016cc9ff49100f51574d67850249db2 100644 (file)
--- a/drivers/video/backlight/tdo24m.c
+++ b/drivers/video/backlight/tdo24m.c
@@ -367,6 +367,7 @@ static int __devinit tdo24m_probe(struct spi_device *spi)
 
        spi_message_init(m);
 
+       x->cs_change = 1;
        x->tx_buf = &lcd->buf[0];
        spi_message_add_tail(x, m);