A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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Input: ads7846 - debouncing and rudimentary sample filtering

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Some touchscreens seem to oscillate heavily for a while after touching
the screen.  Implement support for sampling the screen until we get two
consecutive values that are close enough.

Signed-off-by: Imre Deak <imre.deak@nokia.com>
Signed-off-by: Juha Yrjola <juha.yrjola@nokia.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Imre Deak 2006-04-11 23:42:03 -04:00 • committed by Dmitry Torokhov
commit 0b7018aae7
2 changed files with 121 additions and 38 deletions
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3
include/linux/spi/ads7846.h
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@ -14,5 +14,8 @@ struct ads7846_platform_data {
u16 x_min, x_max;
u16 y_min, y_max;
u16 pressure_min, pressure_max;
u16 debounce_max; /* max number of readings per sample */
u16 debounce_tol; /* tolerance used for filtering */
};