linux/include/linux/spi/ad7877.h
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   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 */
   9struct 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