diff options
Diffstat (limited to 'drivers/input/touchscreen/ad7879.c')
| -rw-r--r-- | drivers/input/touchscreen/ad7879.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c index ba6f0bd1e76..bc3b5187f3a 100644 --- a/drivers/input/touchscreen/ad7879.c +++ b/drivers/input/touchscreen/ad7879.c @@ -129,6 +129,9 @@ struct ad7879 { u16 cmd_crtl1; u16 cmd_crtl2; u16 cmd_crtl3; + int x; + int y; + int Rt; }; static int ad7879_read(struct ad7879 *ts, u8 reg) @@ -175,13 +178,32 @@ static int ad7879_report(struct ad7879 *ts) Rt /= z1; Rt = (Rt + 2047) >> 12; - if (!timer_pending(&ts->timer)) + /* + * Sample found inconsistent, pressure is beyond + * the maximum. Don't report it to user space. + */ + if (Rt > ts->pressure_max) + return -EINVAL; + + /* + * Note that we delay reporting events by one sample. + * This is done to avoid reporting last sample of the + * touch sequence, which may be incomplete if finger + * leaves the surface before last reading is taken. + */ + if (timer_pending(&ts->timer)) { + /* Touch continues */ input_report_key(input_dev, BTN_TOUCH, 1); + input_report_abs(input_dev, ABS_X, ts->x); + input_report_abs(input_dev, ABS_Y, ts->y); + input_report_abs(input_dev, ABS_PRESSURE, ts->Rt); + input_sync(input_dev); + } + + ts->x = x; + ts->y = y; + ts->Rt = Rt; - input_report_abs(input_dev, ABS_X, x); - input_report_abs(input_dev, ABS_Y, y); - input_report_abs(input_dev, ABS_PRESSURE, Rt); - input_sync(input_dev); return 0; } |