Request_Region

Hi,

I'm trying to write an interrupt driver. I have seen that many drivers inside init_function appeared a function like "request_reg_region". I have read some documentation about the function but I haven't clear my ideas. I don't understand the necessity of doing this manner, because inside uClinux there is the document "nios.h" where appear all my physical adress which I can access my hardware.

If someone can explain me which are benefits.

Thanks a lot.