From patchwork Thu Oct 15 08:30:47 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen (ThunderTown)" X-Patchwork-Id: 7404021 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D53C29F1D5 for ; Thu, 15 Oct 2015 08:45:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1C1A720698 for ; Thu, 15 Oct 2015 08:45:25 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 465DD2076D for ; Thu, 15 Oct 2015 08:45:24 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zme8d-0002Ck-24; Thu, 15 Oct 2015 08:43:51 +0000 Received: from szxga02-in.huawei.com ([119.145.14.65]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zme8N-0001ko-A9 for linux-arm-kernel@lists.infradead.org; Thu, 15 Oct 2015 08:43:36 +0000 Received: from 172.24.1.49 (EHLO szxeml433-hub.china.huawei.com) ([172.24.1.49]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CUG14551; Thu, 15 Oct 2015 16:36:29 +0800 (CST) Received: from localhost (10.177.23.164) by szxeml433-hub.china.huawei.com (10.82.67.210) with Microsoft SMTP Server id 14.3.235.1; Thu, 15 Oct 2015 16:36:19 +0800 From: Zhen Lei To: Catalin Marinas , Will Deacon , Joerg Roedel , linux-arm-kernel , iommu , Robin Murphy , Laurent Pinchart , linux-kernel Subject: [PATCH v4 5/5] iommu/arm-smmu: describe the limitation of #iommu-cells Date: Thu, 15 Oct 2015 16:30:47 +0800 Message-ID: <1444897847-18040-6-git-send-email-thunder.leizhen@huawei.com> X-Mailer: git-send-email 1.9.5.msysgit.1 In-Reply-To: <1444897847-18040-1-git-send-email-thunder.leizhen@huawei.com> References: <1444897847-18040-1-git-send-email-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.177.23.164] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151015_014335_600168_B7804013 X-CRM114-Status: GOOD ( 11.41 ) X-Spam-Score: -4.2 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Xinwei Hu , Zhen Lei , Zefan Li , Hanjun Guo , Tianhong Ding Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Only support #iommu-cells = <1>. Signed-off-by: Zhen Lei --- Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt | 6 ++++++ 1 file changed, 6 insertions(+) -- 2.5.0 diff --git a/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt b/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt index 947863a..4845d44 100644 --- a/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt +++ b/Documentation/devicetree/bindings/iommu/arm,smmu-v3.txt @@ -5,6 +5,12 @@ revisions, replacing the MMIO register interface with in-memory command and event queues and adding support for the ATS and PRI components of the PCIe specification. +Please read ./iommu.txt first, here list something special as below: + +** SMMUv3 limited properties: +- #iommu-cells : fixed to <1>. The pci root device is a special case, + its IDs can be omitted in dts, seems #iommu-cells = <0>. + ** SMMUv3 required properties: - compatible : Should include: