diff options
| -rw-r--r-- | drivers/input/touchscreen/ads7846.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index f89c0dd15d8b..f7bc0a3e56d8 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -405,9 +405,19 @@ static int ads7846_read12_ser(struct device *dev, unsigned command) req->xfer[5].rx_buf = &req->scratch; req->xfer[5].len = 2; - CS_CHANGE(req->xfer[5]); spi_message_add_tail(&req->xfer[5], &req->msg); + /* clear the command register */ + req->scratch = 0; + req->xfer[6].tx_buf = &req->scratch; + req->xfer[6].len = 1; + spi_message_add_tail(&req->xfer[6], &req->msg); + + req->xfer[7].rx_buf = &req->scratch; + req->xfer[7].len = 2; + CS_CHANGE(req->xfer[7]); + spi_message_add_tail(&req->xfer[7], &req->msg); + mutex_lock(&ts->lock); ads7846_stop(ts); status = spi_sync(spi, &req->msg); |