From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32F3AC3A59E for ; Wed, 21 Aug 2019 11:24:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 045882082F for ; Wed, 21 Aug 2019 11:24:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726371AbfHULYQ (ORCPT ); Wed, 21 Aug 2019 07:24:16 -0400 Received: from relay11.mail.gandi.net ([217.70.178.231]:35453 "EHLO relay11.mail.gandi.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726227AbfHULYQ (ORCPT ); Wed, 21 Aug 2019 07:24:16 -0400 Received: from localhost (lfbn-1-1545-137.w90-65.abo.wanadoo.fr [90.65.161.137]) (Authenticated sender: alexandre.belloni@bootlin.com) by relay11.mail.gandi.net (Postfix) with ESMTPSA id D8EAC100005; Wed, 21 Aug 2019 11:24:13 +0000 (UTC) Date: Wed, 21 Aug 2019 13:24:13 +0200 From: Alexandre Belloni To: Mark Brown Cc: Li Yang , nandor.han@vaisala.com, Biwen Li , a.zummo@towertech.it, linux-rtc@vger.kernel.org, lkml Subject: Re: [v2] rtc: pcf85363/pcf85263: fix error that failed to run hwclock -w Message-ID: <20190821112413.GA27031@piout.net> References: <20190816024636.34738-1-biwen.li@nxp.com> <20190816080417.GB3545@piout.net> <20190816162825.GE3545@piout.net> <20190820182224.GI4738@sirena.co.uk> <20190821112142.GD5128@sirena.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190821112142.GD5128@sirena.co.uk> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: linux-rtc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rtc@vger.kernel.org On 21/08/2019 12:21:42+0100, Mark Brown wrote: > On Tue, Aug 20, 2019 at 01:33:14PM -0500, Li Yang wrote: > > > Some of the RTC hardware has the capability of address wrapping which > > means if you access a continuous address range across a certain > > boundary(could be the boundary of a regmap region) the hardware > > actually wrap the access to a lower address. But the address > > violation check of regmap rejects such access. According to > > Alexcandre, the address wrapping is essential to the functionality of > > It's *essential*? Will innovation never cease? > To be clear, for some RTCs, its is the only way to accurately set the time. -- Alexandre Belloni, Bootlin Embedded Linux and Kernel engineering https://bootlin.com