Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751211AbWHYPSN (ORCPT ); Fri, 25 Aug 2006 11:18:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751290AbWHYPSM (ORCPT ); Fri, 25 Aug 2006 11:18:12 -0400 Received: from smarthost1.sentex.ca ([64.7.153.18]:35317 "EHLO smarthost1.sentex.ca") by vger.kernel.org with ESMTP id S1751211AbWHYPSK (ORCPT ); Fri, 25 Aug 2006 11:18:10 -0400 From: "Stuart MacDonald" To: "'linux-os \(Dick Johnson\)'" , "'Krzysztof Halasa'" Cc: "'Alan Cox'" , "'David Woodhouse'" , , "'LKML'" Subject: RE: Serial custom speed deprecated? Date: Fri, 25 Aug 2006 11:17:42 -0400 Organization: Connect Tech Inc. Message-ID: <043401c6c859$9c611350$294b82ce@stuartm> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 In-Reply-To: Importance: Normal Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1185 Lines: 27 From: On Behalf Of linux-os (Dick Johnson) > But the baud-rates have always been some approximation that starts > at 75 and increases by powers-of-two. This is because the hardware > always had fixed clocks with dividers that divided by powers-of-two. > What is the claim for the requirement of strange baud-rates set > as an integer of dimension "baud?" Where does this requirement > come from and what devices use these? Perhaps you'd like to check out our products http://www.connecttech.com/ We build a lot of custom boards that have odd clocks to generate very odd baud rates for random serial devices. The Bxxx style has been a thorn in my side since 1999. Also, Oxford's 16PCI95x family has three different points of altering the clock; the clock prescaler, the actual sample rate (which is the classic /16 that most are used to), and the actual divisor. That can produce pretty much any baud rate, albeit with some error. ..Stu - 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/