Device file not appearing

[Greg KH]

On Wed, Mar 17, 2021 at 10:13:22AM -0600, Gregory Anders wrote:
> On Wed, 17 Mar 2021 16:59:08 +0100, Greg KH <greg at kroah.com> wrote:
> > Is your char device listed in /sys/dev/char/ ?
> > 
> > If not, then you have something wrong with your call to device_create().
> > 
> > If so, then you need to look at whatever tool is creating your device
> > nodes in /dev.  Usually the kernel handles this with devtmpfs, but I do
> > not know what your system uses for this.
> 
> Indeed it is. I am working with a fairly minimal system on a Xilinx
> Microblaze soft-core CPU. I have udev installed, but I'm not sure about
> devtmpfs. I'll start digging in that direction and see what I find.

udev does not do device node creation anymore (as of a decade or so),
you should make sure devtmpfs is mounted at /dev/ in order for this to
work properly.

good luck!

greg k-h