From 1d25891f3241103d14ea78236504474a138b8ada Mon Sep 17 00:00:00 2001 From: Semih Hazar Date: Wed, 18 Jul 2007 00:36:04 -0400 Subject: 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 Signed-off-by: David Brownell Signed-off-by: Dmitry Torokhov --- include/linux/spi/ads7846.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux/spi') diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h index a44fa7a..334d314 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; -- cgit v1.1