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  1. #1
    Just Joined!
    Join Date
    Aug 2006

    major number for register_driver

    hi guys,

    For registering a driver into kernel i am using "register_chrdev" with major number & file operations structure(character driver i2c based)

    Ques: what will happen if i put major number=0
    will kernel allocate any major number then, if so how to find what is the major number kernel allocated.

  2. #2
    The function register_chrdev returns the major number of the registered device so you can print out the number with printk.
    You can also read it from /proc/devices.


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