[Linux Driver] device driver model related (ii)--Common API

1, create a device node in the/sys/class/directory, such as creating a CLASS_TEST_USB device node

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1. Static struct CALSS *test_class;
2. Test_class = Class_creat (This_module,"Class_test_usb");

2, create another device node in the CLASS_TEST_USB directory android0, as follows

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1. struct device *dev;
2. dev = device_creat (Test_calss,null,mkdev (0,0), NULL,"android0");
3. if (Is_err (dev))
4. return Ptr_err (dev);

3, create several other device nodes in the/sys/class/class_test_usb/android0/directory enable state, etc.

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2. Static struct device_attribute* test_attributes[]={
4. &dev_attr_state,
6. &dev_attr_enable,
8. Null
10. }
12. Static Device_attr (Enable,s_irugo | S_iwusr,enable_show,enable_store);
18. struct Device_attribute * * attrs=test_attributes;
20. struct Device_attribute *attr;
22. int err;
24. while ((attr=*attrs++))
26. {
28. Err=device_creat_file (DEV,ATTR);
30. if (err)
32. {
34. Device_destory (TEST_CLASS,DEV->DEVT);
36. return err;
38. }
40. }

[Linux Driver] device driver model related (ii)--Common API