From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754110AbcALWzo (ORCPT ); Tue, 12 Jan 2016 17:55:44 -0500 Received: from mout.kundenserver.de ([212.227.17.10]:51536 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753320AbcALWzm (ORCPT ); Tue, 12 Jan 2016 17:55:42 -0500 From: Arnd Bergmann To: liviu.dudau@arm.com Cc: Rongrong Zou , Rongrong Zou , devicetree@vger.kernel.org, Catalin Marinas , Corey Minyard , gregkh@linuxfoundation.org, Will Deacon , linux-kernel@vger.kernel.org, linuxarm@huawei.com, benh@kernel.crashing.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v1 3/3] ARM64 LPC: update binding doc Date: Tue, 12 Jan 2016 23:54:59 +0100 Message-ID: <4052627.BRvFkUij6q@wuerfel> User-Agent: KMail/4.11.5 (Linux/3.16.0-10-generic; KDE/4.11.5; x86_64; ; ) In-Reply-To: <20160112101418.GO13633@e106497-lin.cambridge.arm.com> References: <1451396032-23708-1-git-send-email-zourongrong@gmail.com> <5694C6A4.8060308@huawei.com> <20160112101418.GO13633@e106497-lin.cambridge.arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Provags-ID: V03:K0:3pmI3HRuwIH9pGt0UVe+CZm321Ro1Ax3+5wfUfOXc5oOnkEM9uP 9GFpLFn77TMG6Nkg5re+rzq1DSWyJ5BVgI8Mk/ZiQBsC+tKtsmS7O15JTDIYa1dH3a6a5Ej /SEzKkTGv8VGL69WpSXxKVCr4IlRazh1pYGbdbczgcfwapOaZaoZUTkBF4OWyNbyNyNNKbo hIJ+uNevWYcrLYfYLtAcQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:z+WVxg1QVHg=:Bzg3Ez7L3K0P3alPDG2I9y m9aq8nMFIc7lwoJppWSTVhJ054bTRr2gX4JlOni0AMg36HyNF/UV1W5ZCghTxTUph+DVw226Q OnuoAAFXT+I9sDXk+QvIjt4Ke72EENo29JepacGsm1fmHy9NY+bT+CzY+mEcQdsjSRslqgXxs m9jVO8YA1OQu+iikDX0Kc/ZjpPLdHu7Rt20McYpS5pwUEXgBzEvh7dNDz5FNu9Pm0eKEyACIk RmlBws+LVTSlpXtehspyCh94z9GFIorYDZ1qfA/7LmSsaZ5TuKUnNHHCEyCDDTS8CEVvdcpC7 kKJqKEIsku0HEnXSRSlix3LZMLGpZYvJhXBB8qSa4czoZ5jl4WpI2tuLGeZDqBgPwXPm6vwDQ 7ureSCCKtezQiy3pnuNDMR39jb+73YmiuQ8w4oBaDGID3XunBBuNvowJBLcfJ5BrdEMW7d0SM hT38NsUrLmSDnoq2NVBNvfkPBdBR5aITxP3gzMqvGGR4bNkN0r6SlHLYZlg9RHzGi8Ge8hvcx iH1QEdNCTTKKXVJsjA1l82afSiMDzA5e0+r7esBL2EqxJvAk0ewkzlgMQUt8vfnP/7vwMO63N 92XRTmAc9Fun8IQDoiVZV4PGsc4Tbtd3d38+Ntpo+2di2aTn2C2nS0T/4gesGPMLtPOz9X7Lc BASCSZy7LqenSf9BIRDgfeoNApQV1I1HiVTVzIsdfRXXekfFbtYisorDCbGOTIb+b6P0cNgtZ aK07/VKaUIjTXrym Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tuesday 12 January 2016 10:14:18 liviu.dudau@arm.com wrote: > > OK, looking at of_translate_one() comments it looks like a missing "ranges" property is > only accepted on PowerPC. I suggest you have an empty "ranges" property in your isa > parent node, that will signal to the OF parsing code that the mapping is 1:1. Then have > the IPMI node use the reg = <0x0 0xe4 4>; property values instead of reg = <0x1 0xe4 4>; > > A missing ranges property means that there is no translation, while an empty ranges means a 1:1 translation to the parent bus. We really want the former here, as I/O port addresses are not mapped into the MMIO space of the parent bus. Arnd