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  • i2c_get_clientdata和to_i2c_client 的使用获取平台设备



    struct mxt224_data {
    struct i2c_client *client;
    struct input_dev *input_dev;
    struct early_suspend early_suspend;
    u8 family_id;
    u32 finger_mask;
    int gpio_read_done;
    struct object_t *objects;
    u8 objects_len;
    u8 tsp_version;
    const u8 *power_cfg;
    const u8 *noise_suppression_cfg_ta;
    const u8 *noise_suppression_cfg;
    const u8 *noise_suppression_cfg_t46_ta;
    const u8 *noise_suppression_cfg_t46;


    u8 finger_type;
    u16 msg_proc;
    u16 cmd_proc;
    u16 msg_object_size;
    u32 x_dropbits:2;
    u32 y_dropbits:2;
    void (*power_on)(void);
    void (*power_off)(void);
    //void (*register_cb)(void*);
    void (*read_ta_status)(void*);
    int num_fingers;
    struct finger_info fingers[MXT224_MAX_MT_FINGERS];
    struct timer_list autocal_timer;
    };

    static struct workqueue_struct *cal_check_wq;
    static struct work_struct cal_check_work;


    #define CLEAR_MEDIAN_FILTER_ERROR


    #ifdef CLEAR_MEDIAN_FILTER_ERROR
    typedef enum
    {
    ERR_RTN_CONDITION_T9,
    ERR_RTN_CONDITION_T48,
    ERR_RTN_CONDITION_IDLE,
    ERR_RTN_CONDITION_MAX
    }ERR_RTN_CONTIOIN;


    ERR_RTN_CONTIOIN gErrCondition = ERR_RTN_CONDITION_IDLE;


    static t48_median_config_t noise_median = {0}; //110927 gumi noise


    #endif


    struct mxt224_data *copy_data;
    extern struct class *sec_class;


    static int mxt224_suspend(struct device *dev)

    {
    struct i2c_client *client = to_i2c_client(dev);    从dev 获取 i2c client .  
    struct mxt224_data *data = i2c_get_clientdata(client);   从i2c client 获取平台设备 data


        //cal_check_work_queue
        int ret;
        ret = cancel_work_sync(&cal_check_work);




    mxt224_enabled = 0;
    touch_is_pressed = 0;
    Doing_calibration_falg = 0;
    return mxt224_internal_suspend(data);
    }
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  • 原文地址:https://www.cnblogs.com/yuzaipiaofei/p/4124128.html
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