数据结构设计

struct aic_i2c_dev {
        struct device *dev;
        void __iomem *base;
        struct i2c_adapter adap;
        struct completion cmd_complete;
        struct clk *clk;
        struct reset_control *rst;
        int irq;
        enum aic_i2c_speed i2c_speed;
        u16 scl_hcnt;
        u16 scl_lcnt;
        u32 abort_source;
        struct i2c_msg *msg;
        enum aic_msg_status msg_status;
        int buf_write_idx;
        int buf_read_idx;
        bool is_first_message;
        bool is_last_message;
        int msg_err;
        struct i2c_timings timings;
        u32 master_cfg;
        u32 slave_cfg;
        struct i2c_client *slave;
};