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[v2,2/4] Input: wm9712: Fix returncode for wrong sample

Message ID 1362848753-6725-3-git-send-email-mpa@pengutronix.de (mailing list archive)
State New, archived
Headers show

Commit Message

Markus Pargmann March 9, 2013, 5:05 p.m. UTC 
Instead of interpreting a wrong measurement as pen up, we should try to read
again.

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

Cc: Teresa Gámez <t.gamez@phytec.de>
Cc: Christian Hemp <c.hemp@phytec.de>
Cc: stable@vger.kernel.org
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
 drivers/input/touchscreen/wm9712.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/input/touchscreen/wm9712.c b/drivers/input/touchscreen/wm9712.c
index 6e743e3..a983da1 100644
--- a/drivers/input/touchscreen/wm9712.c
+++ b/drivers/input/touchscreen/wm9712.c
@@ -298,7 +298,7 @@  static int wm9712_poll_sample(struct wm97xx *wm, int adcsel, int *sample)
 		dev_dbg(wm->dev, "adc wrong sample, wanted %x got %x",
 			adcsel & WM97XX_ADCSEL_MASK,
 			*sample & WM97XX_ADCSEL_MASK);
-		return RC_PENUP;
+		return RC_AGAIN;
 	}
 
 	if (wants_pen && !(*sample & WM97XX_PEN_DOWN)) {