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0b7018aae7
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>
21 lines
572 B
C
21 lines
572 B
C
/* linux/spi/ads7846.h */
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/* Touchscreen characteristics vary between boards and models. The
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* platform_data for the device's "struct device" holds this information.
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*
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* It's OK if the min/max values are zero.
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*/
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struct ads7846_platform_data {
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u16 model; /* 7843, 7845, 7846. */
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u16 vref_delay_usecs; /* 0 for external vref; etc */
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u16 x_plate_ohms;
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u16 y_plate_ohms;
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u16 x_min, x_max;
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u16 y_min, y_max;
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u16 pressure_min, pressure_max;
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u16 debounce_max; /* max number of readings per sample */
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u16 debounce_tol; /* tolerance used for filtering */
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};
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