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authorSemih Hazar <semih.hazar@indefia.com>2007-07-18 00:36:04 -0400
committerDmitry Torokhov <dtor@insightbb.com>2007-07-18 00:36:04 -0400
commit1d25891f3241103d14ea78236504474a138b8ada (patch)
treecaeef0ea5f41eae2a005b6eab642e823d4791a0f /include/linux/spi
parente4f48861993294c27849076741eb0c090482560b (diff)
downloadblackbird-op-linux-1d25891f3241103d14ea78236504474a138b8ada.tar.gz
blackbird-op-linux-1d25891f3241103d14ea78236504474a138b8ada.zip
Input: ads7846 - re-check pendown status before reporting events
Pendown status from the PENIRQ pin is currently read only at the beginning of a sample set. If the pen is lifted just after sampling has began then sampled values become wrong. This patch adds an optional platform penirq_recheck_delay attribute. If non-zero, samples are only reported to the input subsystem if PENIRQ is still active that long after the samples taken. Signed-off-by: Semih Hazar <semih.hazar@indefia.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'include/linux/spi')
-rw-r--r--include/linux/spi/ads7846.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h
index a44fa7a02bd9..334d31411629 100644
--- a/include/linux/spi/ads7846.h
+++ b/include/linux/spi/ads7846.h
@@ -24,6 +24,12 @@ struct ads7846_platform_data {
*/
u16 settle_delay_usecs;
+ /* If set to non-zero, after samples are taken this delay is applied
+ * and penirq is rechecked, to help avoid false events. This value
+ * is affected by the material used to build the touch layer.
+ */
+ u16 penirq_recheck_delay_usecs;
+
u16 x_plate_ohms;
u16 y_plate_ohms;
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