1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* linux/spi/ad7877.h */ 3 4 /* Touchscreen characteristics vary between boards and models. The 5 * platform_data for the device's "struct device" holds this information. 6 * 7 * It's OK if the min/max values are zero. 8 */ 9 struct ad7877_platform_data { 10 u16 model; /* 7877 */ 11 u16 vref_delay_usecs; /* 0 for external vref; etc */ 12 u16 x_plate_ohms; 13 u16 y_plate_ohms; 14 15 u16 x_min, x_max; 16 u16 y_min, y_max; 17 u16 pressure_min, pressure_max; 18 19 u8 stopacq_polarity; /* 1 = Active HIGH, 0 = Active LOW */ 20 u8 first_conversion_delay; /* 0 = 0.5us, 1 = 128us, 2 = 1ms, 3 = 8ms */ 21 u8 acquisition_time; /* 0 = 2us, 1 = 4us, 2 = 8us, 3 = 16us */ 22 u8 averaging; /* 0 = 1, 1 = 4, 2 = 8, 3 = 16 */ 23 u8 pen_down_acc_interval; /* 0 = covert once, 1 = every 0.5 ms, 24 2 = ever 1 ms, 3 = every 8 ms,*/ 25 }; 26
