Re: UIO device name

Joakim Tjernlund
2008-09-24T09:58:18Z

On Wed, 2008-09-24 at 18:35 +0900, Paul Mundt wrote:
> On Wed, Sep 24, 2008 at 11:21:33AM +0200, Joakim Tjernlund wrote:
> > As far as I can see there isn't a way to name the /dev/uio%d device file
> > to something more useful, is that so?
> > I would like to name the device file from within the kernel so I can
> > find the correct device from userspace.
> > The very least is to control the minor(%d) number.
> >
> You have a couple of options for this:
>
> - the 'name' sysfs entry for each of the uio devices, which
> corresponds to the uio device name.
> - extracting the relevant data from things like 'lsuio'.
> - hooking in the pretty mame through udev to create an alias.

Right, but I want to do it from within the kernel when I create the
device because that the only place I truly know what HW the uio maps to.

I found that this works:
struct uio_info *info,
struct uio_device *idev;

idev = info->uio_dev;
device_rename(idev->dev, "irq4");

but then I have to copy the private uio_device struct from uio.c
Is there a better way to get at idev->dev?

Jocke