Merge remote-tracking branches 'spi/topic/omap-100k', 'spi/topic/omap-uwire', 'spi...

[platform/kernel/linux-exynos.git] / drivers / input / touchscreen / ads7846.c

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 0f5f968..e431cf6 100644 (file)
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -668,18 +668,22 @@ static int ads7846_no_filter(void *ads, int data_idx, int *val)
 
 static int ads7846_get_value(struct ads7846 *ts, struct spi_message *m)
 {
+       int value;
        struct spi_transfer *t =
                list_entry(m->transfers.prev, struct spi_transfer, transfer_list);
 
        if (ts->model == 7845) {
-               return be16_to_cpup((__be16 *)&(((char*)t->rx_buf)[1])) >> 3;
+               value = be16_to_cpup((__be16 *)&(((char *)t->rx_buf)[1]));
        } else {
                /*
                 * adjust:  on-wire is a must-ignore bit, a BE12 value, then
                 * padding; built from two 8 bit values written msb-first.
                 */
-               return be16_to_cpup((__be16 *)t->rx_buf) >> 3;
+               value = be16_to_cpup((__be16 *)t->rx_buf);
        }
+
+       /* enforce ADC output is 12 bits width */
+       return (value >> 3) & 0xfff;
 }
 
 static void ads7846_update_value(struct spi_message *m, int val)
@@ -1496,7 +1500,6 @@ static int ads7846_remove(struct spi_device *spi)
 static struct spi_driver ads7846_driver = {
        .driver = {
                .name   = "ads7846",
-               .owner  = THIS_MODULE,
                .pm     = &ads7846_pm,
                .of_match_table = of_match_ptr(ads7846_dt_ids),
        },