linux-kernel - Re: Re: Phis in /proc/bus/input/devices same for all devices?

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Message-ID: <d120d5000702220706m5376d133lac6f7807da055e19@mail.gmail.com>
Date:	Thu, 22 Feb 2007 10:06:09 -0500
From:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
To:	"Marcel Holtmann" <marcel@...tmann.org>
Cc:	CIJOML <cijoml@...ny.cz>, linux-kernel@...r.kernel.org
Subject: Re: Re: Phis in /proc/bus/input/devices same for all devices?

Hi Marcel,

On 2/21/07, Marcel Holtmann <marcel@...tmann.org> wrote:
> Hi Dmitry,
>
> > > > > can anybody reply to this and share his/her opinion?
> > > >
> > > > Input core already exports uniq to udev and also via sysfs.
> > >
> > > so do you think it would be better to create phys as a string of the
> > > source and destination address like "<src>-<dst>" for Bluetooth. And
> > > then keep the uniq empty like all USB devices without serial number do?
> > >
> >
> > I'd keep uniq as is and do what you proposed with phys. This way you
> > can either use uniq to identify your device while moving it from one
> > receiver to another (if you have several) or do exact match on phys to
> > get receiver/device pair.
> >
> > Does this make sense?
>
> actually it doesn't help to keep uniq around since the Bluetooth HID
> always reconnects to the same source/host address. Making it reconnect
> results in a virtual cable unplug. So I think that I am going to modify
> the phys to include source and destination address. In the end it is
> only a string.
>

Matching on uniq (and having uniq available) makes sense when you want
to perform device-specific setup and want it to work even if you
change your BT adapter. Imagne yopu have a keyboard that yoou want to
handle in a special way and after you set up your BT card gets fried
and you buy another one. When matchign on uniq your setup will not
change at all.

-- 
Dmitry
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