include/linux/spi/ads7846.h

   1 /* linux/spi/ads7846.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  */
   8 struct ads7846_platform_data {
   9         u16     model;                  /* 7843, 7845, 7846. */
  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         u16     debounce_max;           /* max number of additional readings
  19                                          * per sample */
  20         u16     debounce_tol;           /* tolerance used for filtering */
  21         u16     debounce_rep;           /* additional consecutive good readings
  22                                          * required after the first two */
  23         int     (*get_pendown_state)(void);
  24 };
  25