Commit 54079275 authored Mar 09, 2013 by Markus Pargmann Committed by Dmitry Torokhov Mar 12, 2013

Input: wm9712 - fix wrong pen up readings



Often a reading can be wrong. This patch assures that this is really a
pen up event and not a false reading.

Based on wm9712: pen up by Teresa Gámez and Christian Hemp.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

parent fa45255e

drivers/input/touchscreen/wm9712.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -302,9 +302,13 @@ static int wm9712_poll_sample(struct wm97xx wm, int adcsel, int sample)
		}

		if (wants_pen && !(*sample & WM97XX_PEN_DOWN)) {
		/* Sometimes it reads a wrong value the first time. */
		*sample = wm97xx_reg_read(wm, AC97_WM97XX_DIGITISER_RD);
		if (!(*sample & WM97XX_PEN_DOWN)) {
		wm->pen_probably_down = 0;
		return RC_PENUP;
		}
		}

		return RC_VALID;
		}