From d5b415c95f0e6510451f1446cea832c1f77bd7ea Mon Sep 17 00:00:00 2001 From: Imre Deak Date: Wed, 26 Apr 2006 00:13:18 -0400 Subject: Input: ads7846 - improve filtering for thumb press accuracy Providing more accurate coordinates for thumb press requires additional steps in the filtering logic: - Ignore samples found invalid by the debouncing logic, or the ones that have out of bound pressure value. - Add a parameter to repeat debouncing, so that more then two consecutive good readings are required for a valid sample. Signed-off-by: Imre Deak Acked-by: Juha Yrjola Signed-off-by: Dmitry Torokhov --- include/linux/spi/ads7846.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include/linux/spi') diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h index d8823e237e0b..adb3dafd33e9 100644 --- a/include/linux/spi/ads7846.h +++ b/include/linux/spi/ads7846.h @@ -15,9 +15,11 @@ struct ads7846_platform_data { u16 y_min, y_max; u16 pressure_min, pressure_max; - u16 debounce_max; /* max number of readings per sample */ + u16 debounce_max; /* max number of additional readings + * per sample */ u16 debounce_tol; /* tolerance used for filtering */ - + u16 debounce_rep; /* additional consecutive good readings + * required after the first two */ int (*get_pendown_state)(void); }; -- cgit v1.2.2