From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932470AbXAGKOv (ORCPT ); Sun, 7 Jan 2007 05:14:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932471AbXAGKOv (ORCPT ); Sun, 7 Jan 2007 05:14:51 -0500 Received: from mail.macqel.be ([194.78.208.39]:19564 "EHLO mail.macqel.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932470AbXAGKOu (ORCPT ); Sun, 7 Jan 2007 05:14:50 -0500 Date: Sun, 7 Jan 2007 11:14:49 +0100 From: Philippe De Muyter To: David Brownell Cc: Linux Kernel list Subject: Re: RTC subsystem and fractions of seconds Message-ID: <20070107101449.GA24163@ingate.macqel.be> References: <200701051949.00662.david-b@pacbell.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200701051949.00662.david-b@pacbell.net> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 05, 2007 at 07:49:00PM -0800, David Brownell wrote: > > Those rtc's actually have a 1/100th of second > > register. Should the generic rtc interface not support that? > > Are you implying a new userspace API, or just an in-kernel update? > > Either way, that raises the question of what other features should > be included. What sub-second precision? Multiple alarms? Ways > to manage output clocks? Sub-HZ periodic alarms? One usefull addition for my needs and with a m41t81 is the support of the calibration of the rtc. However this can perhaps be hidden in the .set_mmss function. Philippe --