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=-7.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 8C1C2C282C4 for ; Tue, 12 Feb 2019 18:53:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 5D442222BE for ; Tue, 12 Feb 2019 18:53:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="puD+LTK9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5D442222BE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=S9XMMv2ACUqlt1Sbjj+7CyRiq4PTjoXyHqkqG6uBDQA=; b=puD+LTK96dqy8Qrwlim9GyOSF MuXP5IOmOX6SFq1BrORVk3zFwmsjigg3SLGskQc5Ngcj0NqnYyvgyQvecOXf6UNWZChyjoL9u+jQB R4C7DiDKBNa0wFtG59tcB5+NjUb7wsxioV5PvCfO3YYnMiARxim09xRcZhFb2aF5RGJbPzPPzGdJ8 RFOYJLP1m5Fe7nQ7Pnn15UHpmlBDjEQI/7BNra0+YM/E28oWaucfR13mZsRGvhfhyx7CGBlLUOryS sbO/ok5Ey0Ogo1277jjvnBU22YNSNMKAe89ru9xH5jbsW/k+CaRtVx0rQpNulOXwq9U3GHun8k2Dp QRQZyQrXQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtdBI-0001yG-7x; Tue, 12 Feb 2019 18:53:20 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gtdBE-0001xp-Kz for linux-arm-kernel@lists.infradead.org; Tue, 12 Feb 2019 18:53:17 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 35DB5A78; Tue, 12 Feb 2019 10:53:15 -0800 (PST) Received: from [10.1.196.75] (e110467-lin.cambridge.arm.com [10.1.196.75]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id EF9193F575; Tue, 12 Feb 2019 10:53:12 -0800 (PST) Subject: Re: [PATCH v3 2/7] dt-bindings: bus: Add binding for the Allwinner MBUS controller To: Maxime Ripard , Mark Rutland , Rob Herring , Frank Rowand , Chen-Yu Tsai References: <43f965dae8b0ba8dffd3af478c2836c17feaa18b.1549897336.git-series.maxime.ripard@bootlin.com> From: Robin Murphy Message-ID: <76a7fe92-6847-b668-2d0e-1eee1d291fc3@arm.com> Date: Tue, 12 Feb 2019 18:53:11 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <43f965dae8b0ba8dffd3af478c2836c17feaa18b.1549897336.git-series.maxime.ripard@bootlin.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190212_105316_690691_BA866B5D X-CRM114-Status: GOOD ( 21.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Yong Deng , Arnd Bergmann , dri-devel@lists.freedesktop.org, Dave Martin , Paul Kocialkowski , Thomas Petazzoni , Georgi Djakov , linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 11/02/2019 15:02, Maxime Ripard wrote: > The MBUS controller drives the MBUS that other devices in the SoC will > use to perform DMA. It also has a register interface that allows to > monitor and control the bandwidth and priorities for masters on that > bus. > > Signed-off-by: Maxime Ripard > --- > Documentation/devicetree/bindings/arm/sunxi/sunxi-mbus.txt | 36 +++++++- > 1 file changed, 36 insertions(+) > create mode 100644 Documentation/devicetree/bindings/arm/sunxi/sunxi-mbus.txt > > diff --git a/Documentation/devicetree/bindings/arm/sunxi/sunxi-mbus.txt b/Documentation/devicetree/bindings/arm/sunxi/sunxi-mbus.txt > new file mode 100644 > index 000000000000..e72b7ac9e359 > --- /dev/null > +++ b/Documentation/devicetree/bindings/arm/sunxi/sunxi-mbus.txt > @@ -0,0 +1,36 @@ > +Allwinner Memory Bus (MBUS) controller > + > +The MBUS controller drives the MBUS that other devices in the SoC will > +use to perform DMA. It also has a register interface that allows to > +monitor and control the bandwidth and priorities for masters on that > +bus. > + > +Required properties: > + - compatible: Must be one of: > + - allwinner,sun5i-a13-mbus > + - reg: Offset and length of the register set for the controller > + - clocks: phandle to the clock driving the controller > + - dma-ranges: see booting-without-of.txt Nit: this is a standard property in DTSpec, so it's probably better to refer to that rather than Linux-specific documentation. Robin. > + - #interconnect-cells: Must be one, with the argument being the MBUS > + port ID > + > +Each device having to perform their DMA through the MBUS must have the > +interconnects and interconnect-names properties set to the MBUS > +controller and with "dma" as the interconnect name. > + > +Example: > + > +mbus: dram-controller@1c01000 { > + compatible = "allwinner,sun5i-a13-mbus"; > + reg = <0x01c01000 0x1000>; > + clocks = <&ccu CLK_MBUS>; > + dma-ranges = <0x00000000 0x40000000 0x20000000>; > + #interconnect-cells = <1>; > +}; > + > +fe0: display-frontend@1e00000 { > + compatible = "allwinner,sun5i-a13-display-frontend"; > + ... > + interconnects = <&mbus 19>; > + interconnect-names = "dma"; > +}; > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel