d5b415c95f
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 <imre.deak@nokia.com> Acked-by: Juha Yrjola <juha.yrjola@nokia.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
26 lines
724 B
C
26 lines
724 B
C
/* linux/spi/ads7846.h */
|
|
|
|
/* Touchscreen characteristics vary between boards and models. The
|
|
* platform_data for the device's "struct device" holds this information.
|
|
*
|
|
* It's OK if the min/max values are zero.
|
|
*/
|
|
struct ads7846_platform_data {
|
|
u16 model; /* 7843, 7845, 7846. */
|
|
u16 vref_delay_usecs; /* 0 for external vref; etc */
|
|
u16 x_plate_ohms;
|
|
u16 y_plate_ohms;
|
|
|
|
u16 x_min, x_max;
|
|
u16 y_min, y_max;
|
|
u16 pressure_min, pressure_max;
|
|
|
|
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);
|
|
};
|
|
|