*
* It's OK if the min/max values are zero.
*/
+enum ads7846_filter {
+ ADS7846_FILTER_OK,
+ ADS7846_FILTER_REPEAT,
+ ADS7846_FILTER_IGNORE,
+};
+
struct ads7846_platform_data {
u16 model; /* 7843, 7845, 7846. */
u16 vref_delay_usecs; /* 0 for external vref; etc */
+ int keep_vref_on:1; /* set to keep vref on for differential
+ * measurements as well */
+
+ /* Settling time of the analog signals; a function of Vcc and the
+ * capacitance on the X/Y drivers. If set to non-zero, two samples
+ * are taken with settle_delay us apart, and the second one is used.
+ * ~150 uSec with 0.01uF caps.
+ */
+ u16 settle_delay_usecs;
+
+ /* If set to non-zero, after samples are taken this delay is applied
+ * and penirq is rechecked, to help avoid false events. This value
+ * is affected by the material used to build the touch layer.
+ */
+ u16 penirq_recheck_delay_usecs;
+
u16 x_plate_ohms;
u16 y_plate_ohms;
u16 debounce_rep; /* additional consecutive good readings
* required after the first two */
int (*get_pendown_state)(void);
+ int (*filter_init) (struct ads7846_platform_data *pdata,
+ void **filter_data);
+ int (*filter) (void *filter_data, int data_idx, int *val);
+ void (*filter_cleanup)(void *filter_data);
};