Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753472Ab0DIWNj (ORCPT ); Fri, 9 Apr 2010 18:13:39 -0400 Received: from mail1.radix.net ([207.192.128.31]:33431 "EHLO mail1.radix.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751444Ab0DIWNe (ORCPT ); Fri, 9 Apr 2010 18:13:34 -0400 Subject: Re: [RFC] What are the goals for the architecture of an in-kernel IR system? From: Andy Walls To: Devin Heitmueller Cc: Mauro Carvalho Chehab , James Hogan , Jon Smirl , Pavel Machek , Dmitry Torokhov , Krzysztof Halasa , hermann pitton , Christoph Bartelmus , j@jannau.net, jarod@redhat.com, jarod@wilsonet.com, kraxel@redhat.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, superm1@ubuntu.com In-Reply-To: References: <9e4733910912060952h4aad49dake8e8486acb6566bc@mail.gmail.com> <9e4733910912151338n62b30af5i35f8d0963e6591c@mail.gmail.com> <4BAB7659.1040408@redhat.com> <201004090821.10435.james@albanarts.com> <1270810226.3764.34.camel@palomino.walls.org> <4BBF253A.8030406@redhat.com> Content-Type: text/plain Date: Fri, 09 Apr 2010 18:14:00 -0400 Message-Id: <1270851240.3038.51.camel@palomino.walls.org> Mime-Version: 1.0 X-Mailer: Evolution 2.24.5 (2.24.5-2.fc10) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1633 Lines: 34 On Fri, 2010-04-09 at 17:55 -0400, Devin Heitmueller wrote: > On Fri, Apr 9, 2010 at 9:01 AM, Mauro Carvalho Chehab > 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. The CX23888 and CX23102 can do it. Basically any IR pulse pattern your heart desires; within reason. And any carrier freq you want too; within reason. But let's be real, the cx23885, cx231xx, and cx25840 modules are nowhere near properly supporing suspend/resume for their main video and DMA functions, AFAIK. Regards, Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/