Does register_chrdev function make device file under /dev ?

[Valdis.Kletnieks at vt.edu]

On Tue, 11 Mar 2014 08:01:26 -0000, Kim Chan said:

> To my understanding, device file is needed when a user program wants to
> access the device and we don't need to generate the device file for us to use
> the device in kernel. Is my understanding correct?

Right.  You don't need to generate the device file because you shouldn't be
accessing the device in a file-like manner from inside the kernel.

> I am trying to open a shell on my LCD (is it going to be tty2

That's userspace, not kernel access.
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