1/* linux/spi/ad7877.h */ 2 3/* Touchscreen characteristics vary between boards and models. The 4 * platform_data for the device's "struct device" holds this information. 5 * 6 * It's OK if the min/max values are zero. 7 */ 8struct ad7877_platform_data { 9 u16 model; /* 7877 */ 10 u16 vref_delay_usecs; /* 0 for external vref; etc */ 11 u16 x_plate_ohms; 12 u16 y_plate_ohms; 13 14 u16 x_min, x_max; 15 u16 y_min, y_max; 16 u16 pressure_min, pressure_max; 17 18 u8 stopacq_polarity; /* 1 = Active HIGH, 0 = Active LOW */ 19 u8 first_conversion_delay; /* 0 = 0.5us, 1 = 128us, 2 = 1ms, 3 = 8ms */ 20 u8 acquisition_time; /* 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */ 21 u8 averaging; /* 0 = 1, 1 = 4, 2 = 8, 3 = 16 */ 22 u8 pen_down_acc_interval; /* 0 = covert once, 1 = every 0.5 ms, 23 2 = ever 1 ms, 3 = every 8 ms,*/ 24}; 25