linux-kernel - Re: [RFC] Should we create a raw input interface for IR's ? - Was: Re: [PATCH 1/3 v2] lirc core device driver infrastructure

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Date:	Mon, 23 Nov 2009 17:19:23 +0100
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Krzysztof Halasa <khc@...waw.pl>
CC:	Mauro Carvalho Chehab <mchehab@...hat.com>,
	Jarod Wilson <jarod@...hat.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-kernel@...r.kernel.org,
	Mario Limonciello <superm1@...ntu.com>,
	linux-input@...r.kernel.org, linux-media@...r.kernel.org,
	Janne Grunau <j@...nau.net>,
	Christoph Bartelmus <lirc@...telmus.de>
Subject: Re: [RFC] Should we create a raw input interface for IR's ? - Was:
 Re: [PATCH 1/3 v2] lirc core device driver infrastructure

Krzysztof Halasa wrote:
> Mauro Carvalho Chehab <mchehab@...hat.com> writes:
> 
>> Event input has the advantage that the keystrokes will provide an unique
>> representation that is independent of the device.
> 
> This can hardly work as the only means, the remotes have different keys,
> the user almost always has to provide customized key<>function mapping.

Modern input drivers in the mainline kernel have a scancode-to-keycode
translation table (or equivalent) which can be overwritten by userspace.
The mechanism to do that is the EVIOCSKEYCODE ioctl.

(This is no recommendation for lirc.  I have no idea whether a
pulse/space -> scancode -> keycode translation would be practical there.)
-- 
Stefan Richter
-=====-==--= =-== =-===
http://arcgraph.de/sr/
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