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

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Message-ID: <g2k829197381004091455m20368cc6r63df4a4f00d36b45@mail.gmail.com>
Date:	Fri, 9 Apr 2010 17:55:28 -0400
From:	Devin Heitmueller <dheitmueller@...nellabs.com>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	Andy Walls <awalls@...ix.net>, James Hogan <james@...anarts.com>,
	Jon Smirl <jonsmirl@...il.com>, Pavel Machek <pavel@....cz>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Krzysztof Halasa <khc@...waw.pl>,
	hermann pitton <hermann-pitton@...or.de>,
	Christoph Bartelmus <lirc@...telmus.de>, j@...nau.net,
	jarod@...hat.com, jarod@...sonet.com, kraxel@...hat.com,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org, superm1@...ntu.com
Subject: Re: [RFC] What are the goals for the architecture of an in-kernel IR 
	system?

On Fri, Apr 9, 2010 at 9:01 AM, Mauro Carvalho Chehab
<mchehab@...hat.com> wrote:
> [1] Basically, a keycode (like KEY_POWER) could be used to wake up the machine. So, by
> associating some scancode to KEY_POWER via ir-core, the driver can program the hardware
> to wake up the machine with the corresponding scancode. I can't see a need for a change at
> ir-core to implement such behavior. Of course, some attributes at sysfs can be added
> to enable or disable this feature, and to control the associated logic, but we first
> need to implement the wakeup feature at the hardware driver, and then adding some logic
> at ir-core to add the non-hardware specific code there.

Really?  Have you actually seen any hardware where a particular scan
code can be used to wake up the hardware?  The only hardware I have
seen has the ability to unsuspend on arrival of IR traffic, but you
didn't have the granularity to dictate that it only wake up on
particular scancodes.

Devin

-- 
Devin J. Heitmueller - Kernel Labs
http://www.kernellabs.com
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