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Subject: Re: [PATCH 26/47] Driver core: add groups support to struct device
From: Marcel Holtmann <marcel@holtmann.org>
To: Greg KH <greg@kroah.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>,
       Kay Sievers <kay.sievers@vrfy.org>, linux-kernel@vger.kernel.org,
       Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>
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Date: Tue, 26 Sep 2006 17:18:57 +0200
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Hi Greg,

> > I really disappointed that there was no discussion/review of the
> > implementation at all.
> 
> There has not been any real implementation yet, only a few patches added
> to the core that add a few extra functionality to struct device to allow
> class_device to move that way.  The patches that move the subsystems
> over will be discussed (and some already have, like networking), when
> they are ready.  Right now most of that work is being done by Kay and
> myself as a proof of concept to make sure that we can do this properly
> and that userspace can handle it well.

if you look at the Bluetooth subsystem, it became real devices in the
2.6.18 release. I was using a platform device for the virtual and UART
based adapters with no parent, but I am gonna change this to the virtual
devices once it is upstream. It works beautiful and the /sys/class is
now only a fast entry point to find the devices.

Regards

Marcel