Mini6410 實現簡單按鍵中斷驅動

簡單按鍵中斷驅動，在mini6410開發板上運行良好。

僅供技術交流，請勿商用

1. #include <linux/fs.h>
2. #include <linux/init.h>
3. #include <linux/module.h>
4. #include <linux/kernel.h>
5. #include <linux/irq.h>
6. #include <asm/irq.h>
7. #include <asm/io.h>
8. #include <linux/interrupt.h>
9. #include <linux/miscdevice.h>
10. #include <linux/cdev.h>
11. #include <asm/uaccess.h>
12. #include <mach/hardware.h>
13. #include <linux/platform_device.h>
14. #include <mach/regs-gpio.h>
15. #include <mach/gpio-bank-n.h>
16. #include <plat/gpio-cfg.h>
18. #define DEVICE_NAME "button_irq"
20. static int button_irq_open(struct inode *inode,struct file *filp)
21. {
22. return 0;
23. }
24. static int button_irq_release(struct inode *inode,struct file *filp)
25. {
26. return 0;
27. }
28. static irqreturn_t button_irq_inter(int nr,void *devid)
29. {
30. static int count=0;
31. count ++;
32. printk("%d\n",count);
33. return IRQ_RETVAL(IRQ_HANDLED);
34. }
35. static int button_irq_init()
36. {
37. unsigned int ret;
38. ret = request_irq(IRQ_EINT(0),button_irq_inter,IRQ_TYPE_EDGE_BOTH,"KEY0",NULL);
39. return 0;
40. }
41. static struct file_operations dev_fops =
42. {
43. .owner = THIS_MODULE,
44. .open = button_irq_open,
45. .release = button_irq_release,
47. };
48. static struct miscdevice misc =
49. {
50. .minor = MISC_DYNAMIC_MINOR,
51. .name = DEVICE_NAME,
52. .fops = &dev_fops,
53. };
54. static int __init dev_init()
55. {
56. int ret;
57. ret = misc_register(&misc);
58. printk("button_irq errno\n");
59. button_irq_init();
60. return 0;
61. }
62. static void __exit dev_exit()
63. {
64. misc_deregister(&misc);
65. free_irq(IRQ_EINT(0),NULL);
66. }
68. module_init(dev_init);
69. module_exit(dev_exit);
71. MODULE_LICENSE("GPL");
72. MODULE_AUTHOR("MUGE0913");