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=-10.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 42EA5C56201 for ; Sat, 28 Nov 2020 04:55:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F415121534 for ; Sat, 28 Nov 2020 04:55:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="eNDcQV7j" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731565AbgK1EyY (ORCPT ); Fri, 27 Nov 2020 23:54:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731499AbgK1Exb (ORCPT ); Fri, 27 Nov 2020 23:53:31 -0500 Received: from mail-pl1-x642.google.com (mail-pl1-x642.google.com [IPv6:2607:f8b0:4864:20::642]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34094C0613D1; Fri, 27 Nov 2020 20:53:31 -0800 (PST) Received: by mail-pl1-x642.google.com with SMTP id b23so3592517pls.11; Fri, 27 Nov 2020 20:53:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=MNLKIBMH7ybUpHig1eG9Mv/94KwRp5IA7CDnO20AI+I=; b=eNDcQV7juXZXD+kS1/WHfMBrSFI1u9gs/e9hpZSCr1dbt9ZV1DBy7H/6qnKeRK+aYT 7ESboMUuzzboMsrMq+f0gXNFgtL5ZZ+yu54eer0dJQhxcUZU8AmpNHDqeN+nHibfyTgS PnQehFaQaIVRDGuaAw70Z0ABGUMH5Og4wH3/yPUlAVPxSY9MBozg4IGO3XLwM7f7mRYr 9hQY63j5IiI+porBB01dROcojZ4nyd8jvIDNs4AZGBy06FvI7ZeHoo44tFGfTECIjS3n bPhfJsdQbRTIcQmxdYvxNfrE097XLCUCcsC9IL3/VMswS90Mykfb4jUONNBr6LiEihxI h/0w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=MNLKIBMH7ybUpHig1eG9Mv/94KwRp5IA7CDnO20AI+I=; b=OSwt0SX04ONn2JnUoyfkdOPZIhvZJrmdBraRoiQjkFkkH/ElSr9wZn3nyhqU4LLPnp MY9G5yOPuQRl90c7PnhScyeCz6UPCHmSADHqBAdrIsr5xQK2CGiYhwwxAaE+k84uGkq7 /MbxQWdxpQMlyAbkh8VGrNk02lPrrbl5DE/z77nreXTaYo+mrCbFMv8okRLpI2PeqL/L yK7+OShd7RqLkuN+Kbz3ZgO2K/k016LdihhY/xcsnOrkLM1yX3bebRMMwENrhdaORlMk /uizRLHytgssQMJpRFrmOkcztWYlRRNc5gHLbH5nwK45xzUVE19izah7L/JxNLmMWD3x iVQQ== X-Gm-Message-State: AOAM531zgwadUTYsHi/3157B4DpBt7HWaYzz3TycvGZobK8xs7firuLp V9kxB6eEZD/knw4eMajCN2vsAKZERPM= X-Google-Smtp-Source: ABdhPJzTtKXHxFliVYzhcmuN8zuZYmbZ0pQDhH5YpmjJJBcZ1CW1JyfHju0cgiP24fYhISGO6xQM4A== X-Received: by 2002:a17:902:bb92:b029:d9:e9bf:b775 with SMTP id m18-20020a170902bb92b02900d9e9bfb775mr9958801pls.24.1606539210764; Fri, 27 Nov 2020 20:53:30 -0800 (PST) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id g16sm9190473pfb.201.2020.11.27.20.53.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Nov 2020 20:53:30 -0800 (PST) From: Florian Fainelli To: bcm-kernel-feedback-list@broadcom.com, Zhen Lei , Rob Herring , Arnd Bergmann , Ray Jui , Scott Branden , Andy Gross , Bjorn Andersson , linux-arm-msm , devicetree , linux-arm-kernel , linux-kernel Subject: Re: [PATCH v2 1/2] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges Date: Fri, 27 Nov 2020 20:53:28 -0800 Message-Id: <20201128045328.2411772-1-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201016090833.1892-2-thunder.leizhen@huawei.com> References: <20201016090833.1892-1-thunder.leizhen@huawei.com> <20201016090833.1892-2-thunder.leizhen@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Fri, 16 Oct 2020 17:08:32 +0800, Zhen Lei wrote: > The scripts/dtc/checks.c requires that the node have empty "dma-ranges" > property must have the same "#address-cells" and "#size-cells" values as > the parent node. Otherwise, the following warnings is reported: > > arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi:7.3-14: Warning \ > (dma_ranges_format): /usb:dma-ranges: empty "dma-ranges" property but \ > its #address-cells (1) differs from / (2) > arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi:7.3-14: Warning \ > (dma_ranges_format): /usb:dma-ranges: empty "dma-ranges" property but \ > its #size-cells (1) differs from / (2) > > Arnd Bergmann figured out why it's necessary: > Also note that the #address-cells=<1> means that any device under > this bus is assumed to only support 32-bit addressing, and DMA will > have to go through a slow swiotlb in the absence of an IOMMU. > > Suggested-by: Arnd Bergmann > Signed-off-by: Zhen Lei > --- Applied to devicetree-arm64/next, thanks! -- Florian