Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031752AbXEEPcE (ORCPT ); Sat, 5 May 2007 11:32:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1031761AbXEEPcD (ORCPT ); Sat, 5 May 2007 11:32:03 -0400 Received: from py-out-1112.google.com ([64.233.166.181]:51596 "EHLO py-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031752AbXEEPcA (ORCPT ); Sat, 5 May 2007 11:32:00 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:date:from:x-priority:message-id:to:cc:subject:in-reply-to:references:mime-version:content-type:content-transfer-encoding; b=QvUo/GiyNOLhoONjKc9RLj4AdsJwljRRaluKzY8PIu8iZmjVHxBC8Npn99aNqR3lb4S5VMLkg/dALO/PjvMewXeIgWwP5AoqLlmwvbWxi7fCkY9xM9gp0feeFdYB5qW4Go+jYzYl4S7pzSYAntCZ7bQXzmwQanSOtfjDpQ9OcIM= Date: Sat, 5 May 2007 17:29:56 +0300 From: Paul Sokolovsky X-Priority: 3 (Normal) Message-ID: <67630751.20070505172956@gmail.com> To: Anton Vorontsov CC: Henrique de Moraes Holschuh , Greg KH , David Woodhouse , , Shem Multinymous , Subject: Re: [Kernel-discuss] Re: [PATCH 3/8] Universal power supply class (was: battery class) In-Reply-To: <20070505123230.GA6460@zarina> References: <20070503213139.GC20067@zarina> <41840b750705032155w21d98b5g6236daf9bff66606@mail.gmail.com> <20070505035413.GB21359@khazad-dum.debian.net> <20070505123230.GA6460@zarina> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2418 Lines: 66 Hello Anton, Saturday, May 5, 2007, 3:32:30 PM, you wrote: > Hello Henrique, Shem, > On Sat, May 05, 2007 at 12:54:13AM -0300, Henrique de Moraes Holschuh wrote: >> On Fri, 04 May 2007, Shem Multinymous wrote: >> > >+enum power_supply_type { >> > >+ POWER_SUPPLY_TYPE_BATTERY = 0, >> > >+ POWER_SUPPLY_TYPE_UPS, >> > >+ POWER_SUPPLY_TYPE_AC, >> > >+ POWER_SUPPLY_TYPE_USB, >> > >+}; >> > >> > How about dumb (non-USB) DC power? Any reason to distinguish it from AC? >> [] > I think I got the start point of confusion. It's indeed bad to call such > power supply type as AC. Ok, let's try to at least find the root of this confusion. Of course, course, what we mean by "AC" is exactly continuous, "infinite" power source. Of course, from real physicist point of view, this is incorrect - hardly any device in topic domain (i.e. portable/battery-power) has AC cord sticking out of case. There's usually an AC/DC adapter, and DC is what really fed into device. But in real world, it's rather common to colloquially name such kind of power "AC", and that's "term" is known to many-many people, and intuitively understood even for those, who didn't hit it yet. Actually, this discussion is good confirmation that's the case - people understand in what meaning it is used here, and go to point that it's not "scientifically" correct. > Maybe I should it rename to ADAPTER? Or WALL? Well-well, above was pointed out, that "AC" even if not fully correct, that at least colloquial term of choice for the phenomena inq question. Words above on the other hand seems like out-of-scope and ambiguous. There's actually a nice and terse term for that - mains, but I wonder how well non-English speaking people are familiar with it (I personally saw them only in manuals, which, as well known, nobody reads). Summing up, it may be worth a quick thought, should it be "absolutely correct and absolutely useless", or just well-understood up to the level that even elementary school pupil could write an eloquence essay criticizing it ;-). [] -- Best regards, Paul mailto:pmiscml@gmail.com - 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/