| /* 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 */ |
| int keep_vref_on:1; /* set to keep vref on for differential |
| * measurements as well */ |
| u16 pressure_min, pressure_max; |
| u16 debounce_max; /* max number of additional readings |
| u16 debounce_tol; /* tolerance used for filtering */ |
| 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, |
| int (*filter) (void *filter_data, int data_idx, int *val); |
| void (*filter_cleanup)(void *filter_data); |