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 };