root/include/linux/i2c-pca-platform.h

#ifndef I2C_PCA9564_PLATFORM_H
#define I2C_PCA9564_PLATFORM_H

struct i2c_pca9564_pf_platform_data {
        int gpio;               /* pin to reset chip. driver will work when
                                 * not supplied (negative value), but it
                                 * cannot exit some error conditions then */
        int i2c_clock_speed;    /* values are defined in linux/i2c-algo-pca.h */
        int timeout;            /* timeout = this value * 10us */
};

#endif /* I2C_PCA9564_PLATFORM_H */