include/linux/spi/tsc2046.h

   1 #ifndef _LINUX_SPI_TSC2046_H
   2 #define _LINUX_SPI_TSC2046_H
   3
   4 #include <linux/types.h>
   5 #include <linux/timer.h>
   6
   7 struct tsc2046_platform_data {
   8         s16     dav_gpio;
   9         s16     gpio_debounce;
  10         u16     ts_x_plate_ohm;
  11         u32     ts_max_pressure;  /* Samples with bigger pressure value will
  12                                      be ignored, since the corresponding X, Y
  13                                      values are unreliable */
  14         u32     ts_touch_pressure;/* Pressure limit until we report a
  15                                      touch event. After that we switch
  16                                      to ts_max_pressure. */
  17         unsigned ts_ignore_last : 1;
  18
  19 };
  20
  21 struct tsc2046_ts;
  22
  23 struct tsc2046 {
  24         struct spi_device       *spi;
  25         int                     gpio;
  26
  27         struct tsc2046_ts       *ts;
  28 };
  29
  30 /* The TSC2046 operates at a maximum speed of 2MHz */
  31 #define TSC2046_HZ      2000000
  32
  33 #define TSC2046_DECL_MOD(module)                                        \
  34 extern int  tsc2046_##module##_init(struct tsc2046 *tsc,                \
  35                            struct tsc2046_platform_data *pdata);        \
  36 extern void tsc2046_##module##_exit(struct tsc2046 *tsc);               \
  37 extern int  tsc2046_##module##_suspend(struct tsc2046 *tsc);            \
  38 extern void tsc2046_##module##_resume(struct tsc2046 *tsc);
  39
  40 #define TSC2046_DECL_EMPTY_MOD(module)                                  \
  41 static inline int tsc2046_##module##_init(struct tsc2046 *tsc,          \
  42                            struct tsc2046_platform_data *pdata)         \
  43 {                                                                       \
  44         return 0;                                                       \
  45 }                                                                       \
  46 static inline void tsc2046_##module##_exit(struct tsc2046 *tsc) {}      \
  47 static inline int  tsc2046_##module##_suspend(struct tsc2046 *tsc)      \
  48 {                                                                       \
  49         return 0;                                                       \
  50 }                                                                       \
  51 static inline void tsc2046_##module##_resume(struct tsc2046 *tsc) {}
  52
  53 #if defined(CONFIG_TOUCHSCREEN_TSC2046) || \
  54     defined(CONFIG_TOUCHSCREEN_TSC2046_MODULE)
  55 TSC2046_DECL_MOD(ts)
  56 #else
  57 TSC2046_DECL_EMPTY_MOD(ts)
  58 #endif
  59
  60 #endif