Title: [9242] trunk/drivers/input/touchscreen/ad7877.c: Input: touchscreen: ad7877 filter events where pressure is beyond the maximum
- Revision
- 9242
- Author
- hennerich
- Date
- 2010-10-18 03:58:42 -0400 (Mon, 18 Oct 2010)
Log Message
Input: touchscreen: 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.
Modified Paths
Diff
Modified: trunk/drivers/input/touchscreen/ad7877.c (9241 => 9242)
--- trunk/drivers/input/touchscreen/ad7877.c 2010-10-18 06:28:41 UTC (rev 9241)
+++ trunk/drivers/input/touchscreen/ad7877.c 2010-10-18 07:58:42 UTC (rev 9242)
@@ -360,6 +360,13 @@
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);
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