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| author | Michael Hennerich <michael.hennerich@analog.com> | 2010-10-15 18:49:08 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-10-18 06:12:46 +0200 |
| commit | 1d02ad436235080b8a95a2c86a66cb7b8f2e9df9 (patch) | |
| tree | b7b1e19086ce8f3df55e0eb60c1354f4fe26b37a /drivers/input/touchscreen/ad7877.c | |
| parent | Input: ad7877 - implement EV_KEY:BTN_TOUCH reporting (diff) | |
| download | linux-1d02ad436235080b8a95a2c86a66cb7b8f2e9df9.tar.xz linux-1d02ad436235080b8a95a2c86a66cb7b8f2e9df9.zip | |
Input: ad7877 - filter events where pressure is beyond the maximum
Suppress events where pressure > pressure_max.
These events come typically along with inaccurate X and Y samples.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/touchscreen/ad7877.c')
| -rw-r--r-- | drivers/input/touchscreen/ad7877.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c index 96c0a0d4b69c..b7de78e82737 100644 --- a/drivers/input/touchscreen/ad7877.c +++ b/drivers/input/touchscreen/ad7877.c @@ -360,6 +360,13 @@ static int ad7877_rx(struct ad7877 *ts) Rt /= z1; Rt = (Rt + 2047) >> 12; + /* + * Sample found inconsistent, pressure is beyond + * the maximum. Don't report it to user space. + */ + if (Rt > ts->pressure_max) + return -EINVAL; + if (!timer_pending(&ts->timer)) input_report_key(input_dev, BTN_TOUCH, 1); |