MSM8998(高通835处理器)外接指纹识别传感器linux驱动如何与设备树进行匹配

驱动名称：fpc1020.c

平台：msm8998

描述指纹传感器设备的结构：

1. struct fpc1020_data {

2. struct device *dev;

3. struct wake_lock ttw_wl;

4. int irq_gpio;

5. int rst_gpio; //复位gpio号

6. int irq_num; //中断号

7. struct mutex lock;

8. bool prepared;

9.  

10. struct pinctrl *ts_pinctrl;

11. struct pinctrl_state *gpio_state_active;

12. struct pinctrl_state *gpio_state_suspend;

13.  

14. #ifdef ONEPLUS_EDIT

15. int EN_VDD_gpio;

16. int id0_gpio;

17. int id1_gpio;

18. int id2_gpio;

19. struct input_dev *input_dev;

20. int screen_state; //状态 ： 1: on 0:off

21. int sensor_version; //传感器的版本号：0x01:fpc1245 0x02:fpc1263

22. #endif

23. #if defined(CONFIG_FB)

24. struct notifier_block fb_notif;

25. #endif

26. struct work_struct pm_work;

27. int proximity_state; /* 0:far 1:near */

28. bool irq_enabled;

29. spinlock_t irq_lock;

30. struct completion irq_sent;

31. };

fpc1020驱动使用platform总线匹配硬件设备，驱动如下：

1. static struct of_device_id fpc1020_of_match[] = {

2. { .compatible = "fpc,fpc1020", }, //设备树匹配的属性

3. {}

4. };

5. MODULE_DEVICE_TABLE(of, fpc1020_of_match);

6.  

7. static struct platform_driver fpc1020_driver = {

8. .driver = {

9. .name = "fpc1020",

10. .owner = THIS_MODULE,

11. .of_match_table = fpc1020_of_match, //设备树match函数

12. },

13. .probe = fpc1020_probe, //匹配函数

14. };

15. module_platform_driver(fpc1020_driver);

匹配的设备树信息如下：