include/linux/input/gpio_tilt.h

   1 #ifndef _INPUT_GPIO_TILT_H
   2 #define _INPUT_GPIO_TILT_H
   3
   4 /**
   5  * struct gpio_tilt_axis - Axis used by the tilt switch
   6  * @axis:               Constant describing the axis, e.g. ABS_X
   7  * @min:                minimum value for abs_param
   8  * @max:                maximum value for abs_param
   9  * @fuzz:               fuzz value for abs_param
  10  * @flat:               flat value for abs_param
  11  */
  12 struct gpio_tilt_axis {
  13         int axis;
  14         int min;
  15         int max;
  16         int fuzz;
  17         int flat;
  18 };
  19
  20 /**
  21  * struct gpio_tilt_state - state description
  22  * @gpios:              bitfield of gpio target-states for the value
  23  * @axes:               array containing the axes settings for the gpio state
  24  *                      The array indizes must correspond to the axes defined
  25  *                      in platform_data
  26  *
  27  * This structure describes a supported axis settings
  28  * and the necessary gpio-state which represent it.
  29  *
  30  * The n-th bit in the bitfield describes the state of the n-th GPIO
  31  * from the gpios-array defined in gpio_regulator_config below.
  32  */
  33 struct gpio_tilt_state {
  34         int gpios;
  35         int *axes;
  36 };
  37
  38 /**
  39  * struct gpio_tilt_platform_data
  40  * @gpios:              Array containing the gpios determining the tilt state
  41  * @nr_gpios:           Number of gpios
  42  * @axes:               Array of gpio_tilt_axis descriptions
  43  * @nr_axes:            Number of axes
  44  * @states:             Array of gpio_tilt_state entries describing
  45  *                      the gpio state for specific tilts
  46  * @nr_states:          Number of states available
  47  * @debounce_interval:  debounce ticks interval in msecs
  48  * @poll_interval:      polling interval in msecs - for polling driver only
  49  * @enable:             callback to enable the tilt switch
  50  * @disable:            callback to disable the tilt switch
  51  *
  52  * This structure contains gpio-tilt-switch configuration
  53  * information that must be passed by platform code to the
  54  * gpio-tilt input driver.
  55  */
  56 struct gpio_tilt_platform_data {
  57         struct gpio *gpios;
  58         int nr_gpios;
  59
  60         struct gpio_tilt_axis *axes;
  61         int nr_axes;
  62
  63         struct gpio_tilt_state *states;
  64         int nr_states;
  65
  66         int debounce_interval;
  67
  68         unsigned int poll_interval;
  69         int (*enable)(struct device *dev);
  70         void (*disable)(struct device *dev);
  71 };
  72
  73 #endif