root/include/linux/input/pixcir_ts.h

#ifndef _PIXCIR_I2C_TS_H
#define _PIXCIR_I2C_TS_H

/*
 * Register map
 */
#define PIXCIR_REG_POWER_MODE   51
#define PIXCIR_REG_INT_MODE     52

/*
 * Power modes:
 * active: max scan speed
 * idle: lower scan speed with automatic transition to active on touch
 * halt: datasheet says sleep but this is more like halt as the chip
 *       clocks are cut and it can only be brought out of this mode
 *       using the RESET pin.
 */
enum pixcir_power_mode {
        PIXCIR_POWER_ACTIVE,
        PIXCIR_POWER_IDLE,
        PIXCIR_POWER_HALT,
};

#define PIXCIR_POWER_MODE_MASK  0x03
#define PIXCIR_POWER_ALLOW_IDLE (1UL << 2)

/*
 * Interrupt modes:
 * periodical: interrupt is asserted periodicaly
 * diff coordinates: interrupt is asserted when coordinates change
 * level on touch: interrupt level asserted during touch
 * pulse on touch: interrupt pulse asserted druing touch
 *
 */
enum pixcir_int_mode {
        PIXCIR_INT_PERIODICAL,
        PIXCIR_INT_DIFF_COORD,
        PIXCIR_INT_LEVEL_TOUCH,
        PIXCIR_INT_PULSE_TOUCH,
};

#define PIXCIR_INT_MODE_MASK    0x03
#define PIXCIR_INT_ENABLE       (1UL << 3)
#define PIXCIR_INT_POL_HIGH     (1UL << 2)

/**
 * struct pixcir_irc_chip_data - chip related data
 * @max_fingers:        Max number of fingers reported simultaneously by h/w
 * @has_hw_ids:         Hardware supports finger tracking IDs
 *
 */
struct pixcir_i2c_chip_data {
        u8 max_fingers;
        bool has_hw_ids;
};

struct pixcir_ts_platform_data {
        int x_max;
        int y_max;
        int gpio_attb;          /* GPIO connected to ATTB line */
        struct pixcir_i2c_chip_data chip;
};

#endif