cregit-Linux how code gets into the kernel

Release 4.7 include/linux/input/gpio_tilt.h

#ifndef _INPUT_GPIO_TILT_H

#define _INPUT_GPIO_TILT_H

/**
 * struct gpio_tilt_axis - Axis used by the tilt switch
 * @axis:               Constant describing the axis, e.g. ABS_X
 * @min:                minimum value for abs_param
 * @max:                maximum value for abs_param
 * @fuzz:               fuzz value for abs_param
 * @flat:               flat value for abs_param
 */

struct gpio_tilt_axis {
	
int axis;
	
int min;
	
int max;
	
int fuzz;
	
int flat;
};

/**
 * struct gpio_tilt_state - state description
 * @gpios:              bitfield of gpio target-states for the value
 * @axes:               array containing the axes settings for the gpio state
 *                      The array indizes must correspond to the axes defined
 *                      in platform_data
 *
 * This structure describes a supported axis settings
 * and the necessary gpio-state which represent it.
 *
 * The n-th bit in the bitfield describes the state of the n-th GPIO
 * from the gpios-array defined in gpio_regulator_config below.
 */

struct gpio_tilt_state {
	
int gpios;
	
int *axes;
};

/**
 * struct gpio_tilt_platform_data
 * @gpios:              Array containing the gpios determining the tilt state
 * @nr_gpios:           Number of gpios
 * @axes:               Array of gpio_tilt_axis descriptions
 * @nr_axes:            Number of axes
 * @states:             Array of gpio_tilt_state entries describing
 *                      the gpio state for specific tilts
 * @nr_states:          Number of states available
 * @debounce_interval:  debounce ticks interval in msecs
 * @poll_interval:      polling interval in msecs - for polling driver only
 * @enable:             callback to enable the tilt switch
 * @disable:            callback to disable the tilt switch
 *
 * This structure contains gpio-tilt-switch configuration
 * information that must be passed by platform code to the
 * gpio-tilt input driver.
 */

struct gpio_tilt_platform_data {
	
struct gpio *gpios;
	
int nr_gpios;

	
struct gpio_tilt_axis *axes;
	
int nr_axes;

	
struct gpio_tilt_state *states;
	
int nr_states;

	
int debounce_interval;

	
unsigned int poll_interval;
	
int (*enable)(struct device *dev);
	
void (*disable)(struct device *dev);
};

#endif

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