how can we dynamically create the device node for character driver.

Inba · 08-23-2011, 06:41 AM

Hi,

For creating the node for miscellaneous device, by using the struct miscdevice and struct file_operation structure
the miscellaneous device node created at /proc/misc.

But, how we create a node for the character device?
ie., dynamically create a node at /proc/devices

bsat · 08-24-2011, 12:21 AM

I am not sure what are you asking. The device nodes are created in /dev and not in /proc. Creating entries in /proc is completely different from creating device entries in /dev, what are you looking for ?

Inba · 08-24-2011, 12:39 AM

Iam looking for to create a node dynamically at /dev only.

AustinMarton · 08-30-2011, 07:42 PM

To dynamically create device nodes (which are in /dev) you should use udev or maybe mdev for embedded systems.

In your char driver you could set the major number to 0 and this will mean the major number is dynamically allocated.