Edit File: ads7846.h
/* 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. */ enum ads7846_filter { ADS7846_FILTER_OK, ADS7846_FILTER_REPEAT, ADS7846_FILTER_IGNORE, }; struct ads7846_platform_data { u16 model; /* 7843, 7845, 7846, 7873. */ u16 vref_delay_usecs; /* 0 for external vref; etc */ u16 vref_mv; /* external vref value, milliVolts * ads7846: if 0, use internal vref */ bool keep_vref_on; /* set to keep vref on for differential * measurements as well */ bool swap_xy; /* swap x and y axes */ /* 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 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 gpio_pendown; /* the GPIO used to decide the pendown * state if get_pendown_state == NULL */ int gpio_pendown_debounce; /* platform specific debounce time for * the gpio_pendown */ int (*get_pendown_state)(void); int (*filter_init) (const struct ads7846_platform_data *pdata, void **filter_data); int (*filter) (void *filter_data, int data_idx, int *val); void (*filter_cleanup)(void *filter_data); void (*wait_for_sync)(void); bool wakeup; unsigned long irq_flags; };