linux-kernel - Re: [RFC] What are the goals for the architecture of an in-kernel IR system?

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Message-ID: <4B11893D.5070209@s5r6.in-berlin.de>
Date:	Sat, 28 Nov 2009 21:34:05 +0100
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Jon Smirl <jonsmirl@...il.com>
CC:	Christoph Bartelmus <lirc@...telmus.de>, khc@...waw.pl,
	awalls@...ix.net, dmitry.torokhov@...il.com, j@...nau.net,
	jarod@...hat.com, jarod@...sonet.com, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
	maximlevitsky@...il.com, mchehab@...hat.com, superm1@...ntu.com
Subject: Re: [RFC] What are the goals for the architecture of an in-kernel
 IR 	system?

Stefan Richter wrote:
> Jon Smirl wrote:
>> We have one IR receiver device and multiple remotes. How does the
>> input system know how many devices to create corresponding to how many
>> remotes you have?
> 
> If several remotes are to be used on the same receiver, then they
> necessarily need to generate different scancodes, don't they?  Otherwise
> the input driver wouldn't be able to route their events to the
> respective subdevice.  But if they do generate different scancodes,
> there is no need to create subdevices just for EVIOCSKEYCODE's sake. (It
> might still be desirable to have subdevices for other reasons perhaps.)

PS, forgot to add:  If there is a real need to initiate device creation
from userspace, then ioctl is not the way to go.
-- 
Stefan Richter
-=====-==--= =-== ===--
http://arcgraph.de/sr/
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