Input: ads7846 - debouncing and rudimentary sample filtering
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>
diff --git a/include/linux/spi/ads7846.h b/include/linux/spi/ads7846.h
index 72261e0..3f76649 100644
--- a/include/linux/spi/ads7846.h
+++ b/include/linux/spi/ads7846.h
@@ -14,5 +14,8 @@
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 */
};
