linux-kernel - Re: automagic udev device node creation?

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Message-ID: <ac3eb2510908120923w4a3bc4efuc747a80ed13ccc31@mail.gmail.com>
Date:	Wed, 12 Aug 2009 18:23:48 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	"Sander, Tim" <Tim.Sander@....com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: automagic udev device node creation?

On Wed, Aug 12, 2009 at 18:04, Sander, Tim<Tim.Sander@....com> wrote:
> I have written a simple mmap test driver which seems to work so far.=20
> The only problem i have, is that no udev device node is automatically =
> created?=20
> So i really would like to know what part is missing to make udev =
> automatically create
> the device node?
>
> Everything works alright if i just create the device node by hand.
>
> I suspect that these should be created out of the sysfs information =
> created by the module.

Assign the "devt" value in the registered "struct device" with the
major/minor value of your device instance.

  http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=include/linux/device.h;h=aebb81036db2d368a7b55664f5a2b9d102c5109d;hb=HEAD#l407

Kay
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