Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753578Ab2B0QE2 (ORCPT ); Mon, 27 Feb 2012 11:04:28 -0500 Received: from mail-lpp01m010-f46.google.com ([209.85.215.46]:60686 "EHLO mail-lpp01m010-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751124Ab2B0QE1 (ORCPT ); Mon, 27 Feb 2012 11:04:27 -0500 MIME-Version: 1.0 In-Reply-To: <000701ccf567$b9dee150$2d9ca3f0$%szyprowski@samsung.com> References: <000e01ccc624$c9349310$5b9db930$%cho@samsung.com> <014601ccf2fa$a25c8560$e7159020$%szyprowski@samsung.com> <000701ccf567$b9dee150$2d9ca3f0$%szyprowski@samsung.com> Date: Tue, 28 Feb 2012 01:04:25 +0900 X-Google-Sender-Auth: J7uuknqITHc5afa7x-1RmKEiAG4 Message-ID: Subject: Re: [PATCH v8 0/2] ommu/exynos: Add IOMMU/System MMU driver for Samsung Exynos From: KyongHo Cho To: Marek Szyprowski Cc: Kukjin Kim , Subash Patel , linux-kernel@vger.kernel.org, Younglak Kim , iommu@lists.linux-foundation.org, linux-samsung-soc@vger.kernel.org, Kyungmin Park , Sanghyun Lee , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1111 Lines: 31 On Tue, Feb 28, 2012 at 12:51 AM, Marek Szyprowski wrote: >> The next patch will be submitted by 2/28. > > Ok, I will check it soon then. Thank you a lot. >> The next IOMMU driver defines just one platform device for a H/W device. >> Thus, it defines just one SYSMMU_MFC platform device, for example. >> (the previous one defines 2 platform devices for SYSMMU_MFC) > > Exynos4210 has 2 iommu controllers for MFC device - one for each memory bus. > Each MFC bus can address 128MiB of IO address space. Do you mean that the new driver > will merge these 2 controllers into one? This way we will lose half of address space > for MFC device. The situation seems somewhat different from our use of MFC. I also heard from Jungtae Park that it is better to define separate platform devices for the system MMUs of MFC. Regards, Cho KyongHo. -- 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/