include/linux/spi/ad7877.h

   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 };