Add new i2c-based input mouse driver into input subsystem for Cypress trackpad devices.

include/linux/cyapa.h

+#ifndef CYAPA_H
+#define CYAPA_H
+
+
+#define CYAPA_I2C_NAME  "cypress_i2c_apa"
+
+/* Active power state scanning/processing refresh interval time. unit: ms. */
+#define CYAPA_ACTIVE_POLLING_INTVAL_TIME  0x00
+/* Low power state scanning/processing refresh interval time. unit: ms. */
+#define CYAPA_LOWPOWER_POLLING_INTVAL_TIME 0x10
+/* Touch timeout for active power state. unit: ms. */
+#define CYAPA_ACTIVE_TOUCH_TIMEOUT  0xFF
+
+/* Max report rate limited for Cypress Trackpad. */
+#define CYAPA_NO_LIMITED_REPORT_RATE  0
+#define CYAPA_REPORT_RATE  (CYAPA_NO_LIMITED_REPORT_RATE)
+#define CYAPA_POLLING_REPORTRATE_DEFAULT 125
+
+
+/* APA trackpad firmware generation */
+enum cyapa_gen {
+        CYAPA_GEN1 = 0x01,
+        CYAPA_GEN2 = 0x02,
+};
+
+/*
+** APA trackpad power states.
+** Used in register 0x00, bit3-2, PowerMode field.
+*/
+enum cyapa_powerstate {
+        CYAPA_PWR_ACTIVE = 0x01,
+        CYAPA_PWR_LIGHT_SLEEP = 0x02,
+        CYAPA_PWR_MEDIUM_SLEEP = 0x03,
+        CYAPA_PWR_DEEP_SLEEP = 0x04,
+};
+
+struct cyapa_platform_data {
+        u32 flag;   /* reserved for future use. */
+        enum cyapa_gen gen;  /* trackpad firmware generation. */
+        enum cyapa_powerstate power_state;
+
+        /* use absolute data report or relative data report. */
+        unsigned use_absolute_mode:1;
+        /* use polling mode or interrupt mode. */
+        unsigned use_polling_mode:1;
+        /* active mode, polling refresh interval; ms */
+        u8 polling_interval_time_active;
+        /* low power mode, polling refresh interval; ms */
+        u8 polling_interval_time_lowpower;
+        u8 active_touch_timeout;  /* active touch timeout; ms */
+        char *name;  /* device name of Cypress I2C trackpad. */
+        /* the gpio id used for interrupt to notify host data is ready. */
+        s16 irq_gpio;
+        u32 report_rate;  /* max limitation of data report rate. */
+
+        int (*wakeup)(void);
+        int (*init)(void);
+};
+
+#endif  /* #ifndef CYAPA_H */