Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751090AbVKCIid (ORCPT ); Thu, 3 Nov 2005 03:38:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751149AbVKCIid (ORCPT ); Thu, 3 Nov 2005 03:38:33 -0500 Received: from witte.sonytel.be ([80.88.33.193]:7076 "EHLO witte.sonytel.be") by vger.kernel.org with ESMTP id S1751090AbVKCIid (ORCPT ); Thu, 3 Nov 2005 03:38:33 -0500 Date: Thu, 3 Nov 2005 09:37:52 +0100 (CET) From: Geert Uytterhoeven To: Pavel Machek cc: Robert Schwebel , Vojtech Pavlik , rpurdie@rpsys.net, lenz@cs.wisc.edu, kernel list , Russell King Subject: Re: best way to handle LEDs In-Reply-To: <20051102211334.GH23943@elf.ucw.cz> Message-ID: References: <20051101234459.GA443@elf.ucw.cz> <20051102202622.GN23316@pengutronix.de> <20051102211334.GH23943@elf.ucw.cz> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1374 Lines: 36 On Wed, 2 Nov 2005, Pavel Machek wrote: > > > yellow off: not charging > > > yellow on: charging > > > yellow fast blink: charge error > > > > > > I think even slow blinking was used somewhere. I have some code from > > > John Lenz (attached); it uses sysfs interface, exports led collor, and > > > allows setting different frequencies. > > > > > > Is that acceptable, or should some other interface be used? > > > > IMHO reducing digital outputs to LEDs goes not far enough. All System- > > on-Chip CPUs have General Purpose I/O pins today, which can act as > > inputs or outputs and may be used for LEDs, matrix keyboard lines, > > We have some leds that are *not* on GPIO pins (like driven by > ACPI). We'd like to support those, too. I though ACPI was software? These LEDs have to be driven by some hardware, right? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds - 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/