From patchwork Wed Feb 6 19:41:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 10799977 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 622D5746 for ; Wed, 6 Feb 2019 19:42:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 520CA2C3F0 for ; Wed, 6 Feb 2019 19:42:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 45E8B2C461; Wed, 6 Feb 2019 19:42:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7D8342C3F0 for ; Wed, 6 Feb 2019 19:42:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=lPGYkJdVWbFrzh7T9o/0dJH6VYA0Rbpjd8BwQbUNGEA=; b=EU4Ppi2XSj2bZN e5XZC3T5Ojhaxf55bmgUfO/9tNcOUWCgXZ5USFygfCEGolBv2idw7Bgu9bk3SA24nxl0zuhgMIDaK v9T3mkCBtvyOh3yEXH42Xd1YBj3rbQf/iGX3LOPLOYk/ulnZSOjNrEYV1gg0K0KF3mShif9FQnOjN vh8CLcZD1P08bOunnxjTPC6ojW0Zvxuf/u8Ql3u0ix4voV/whaBVOLiO/o7ugF5QP8INMc90Cnrdj 3cRj0n0DfJRZCpF5HBEuLK1NR3tDHlbhC3oOyoFwwj/rcIy3/YNLX2dDc6Vk/NPtIEPn4k8HVC/qf AZmLX0ZxYtbTLCGr116g==; 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 1grT5d-0003vd-1P; Wed, 06 Feb 2019 19:42:33 +0000 Received: from relay2-d.mail.gandi.net ([217.70.183.194]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1grT57-0003SV-Ay for linux-arm-kernel@lists.infradead.org; Wed, 06 Feb 2019 19:42:04 +0000 X-Originating-IP: 90.89.68.76 Received: from localhost (lfbn-1-10718-76.w90-89.abo.wanadoo.fr [90.89.68.76]) (Authenticated sender: maxime.ripard@bootlin.com) by relay2-d.mail.gandi.net (Postfix) with ESMTPSA id B006D40006; Wed, 6 Feb 2019 19:41:54 +0000 (UTC) From: Maxime Ripard To: Mark Rutland , Rob Herring , Frank Rowand , Chen-Yu Tsai , Maxime Ripard Subject: [PATCH v2 2/7] dt-bindings: bus: Add binding for the Allwinner MBUS controller Date: Wed, 6 Feb 2019 20:41:19 +0100 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190206_114201_539140_C649F2A3 X-CRM114-Status: GOOD ( 12.21 ) 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, Thomas Petazzoni , Arnd Bergmann , dri-devel@lists.freedesktop.org, Georgi Djakov , Paul Kocialkowski , Yong Deng , Robin Murphy , Dave Martin , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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..bd4b90477610 --- /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 + - #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>; + #dma-parent-cells = <1>; +}; + +fe0: display-frontend@1e00000 { + compatible = "allwinner,sun5i-a13-display-frontend"; + ... + interconnects = <&mbus 19>; + interconnect-names = "dma"; +};