ads7846 touchscreen: fix pressure

Pavel Machek
2009-11-20T18:22:58Z

On Zaurus, pressure is reported inverted -- the lighter the pressure,
the bigger numerical value. This should fix it.

Signed-off-by: Pavel Machek <pavel@ucw.cz>

--- linux-rc/drivers/input.ofic/touchscreen/ads7846.c 2009-10-06 13:49:56.000000000 +0200
+++ linux-rc/drivers/input/touchscreen/ads7846.c 2009-10-06 21:18:25.000000000 +0200
@@ -608,12 +609,12 @@

input_report_abs(input, ABS_X, x);
input_report_abs(input, ABS_Y, y);
- input_report_abs(input, ABS_PRESSURE, Rt);
+ input_report_abs(input, ABS_PRESSURE, ts->pressure_max-Rt);

input_sync(input);
#ifdef VERBOSE
dev_dbg(&ts->spi->dev, "%4d/%4d/%4d\n", x, y, Rt);
#endif
}

hrtimer_start(&ts->timer, ktime_set(0, TS_POLL_PERIOD),