CareerCup

statically and dynamically(Run time)
statically means :

first=MKDEV(int major, int minor);
then
u can use the return type of MKDEV that is first in this function

int register_chrdev_region(dev_t first, unsigned int count,
char *name);

dynamic means :in run time u need to create device file there u need to enter
eg mknod /dev/filename typeofdevice majornumber minornumber

Not sure what this question means. Can you be a bit more descriptive?

Hey mayurnandurkar,

Are you talking about endianness (big-endian/little-endian)?

-Rachit

when u know the major number and minor number u will use statically when u dnt know which major number and minor number u will use u will use dynamically

Its from Drivers perspective. How we can assign Major no & minor no to any device.
kamal, which one should we prefer, static or dynamic.?

One of the ways is to use mknod -m666 followed by device name on /dev c MAJOR MINOR

there are two ways to assign a major and minor number to device.
1)statically
2)dynamically
statically:register_chrdev_region(dev_t first, unsigned int count,
char *name); it is a kernel call it is responsible for allocating device number statically.
-> it accept three arguments 1.device number.
->integer value it is your driver supported to number of devices.
->driver name.
2)dynamically:alloc_chrdev_region(); it is responsible for allocatting
device numder dynamically,means this call says to kernel to allocate freelly avilable major number.