From patchwork Fri Apr 7 14:04:14 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eugeniy Paltsev X-Patchwork-Id: 748306 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3w01YH44Tyz9s80 for ; Sat, 8 Apr 2017 00:04:51 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jWPmgAKZ"; dkim-atps=neutral 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:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=BlPudWLKByptZU80DaAWgKGsL+T2DW58hW39Tx/00bI=; b=jWPmgAKZaUJr5jwFKvy9flN7l4 pwhSTt9UXskS2Rb772+avTVJvGNt9rsg92rDzBy2nEzuO2im/LjustcaIL+2Fa7hB7ZudqHT7mBzk TAegpaX04VCFYD2GKzHms0TbkqzGrALiLq7IqcWLHcT45YAbAHNn0cnIBSreYPQaX7ERCkLxYmakv uxaI2eRmCRmOEQGaRM/bN0OBi0V2STU7g4HNuB64AP2F94hdmDnqfOsNiRgTbL4o0HFsbt2wghHGH BntmE+I6zSfW61gJ1KnRZHOrjEv+8rQGqZQSW0PUVySzkrgeUpwQXuIunSkP1X45E3NQApDGaTuJK Tr46gqsQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cwUVO-0003FQ-8K; Fri, 07 Apr 2017 14:04:50 +0000 Received: from smtprelay.synopsys.com ([198.182.47.9]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cwUVJ-0003CM-Fa for linux-snps-arc@lists.infradead.org; Fri, 07 Apr 2017 14:04:47 +0000 Received: from mailhost.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id 3818224E16D8; Fri, 7 Apr 2017 07:04:27 -0700 (PDT) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id 1E476F6; Fri, 7 Apr 2017 07:04:27 -0700 (PDT) Received: from paltsev-8460p.internal.synopsys.com (paltsev-8460p.internal.synopsys.com [10.121.8.111]) by mailhost.synopsys.com (Postfix) with ESMTP id A8725B3; Fri, 7 Apr 2017 07:04:24 -0700 (PDT) From: Eugeniy Paltsev To: dmaengine@vger.kernel.org Subject: [PATCH v2 1/2] dt-bindings: Document the Synopsys DW AXI DMA bindings Date: Fri, 7 Apr 2017 17:04:14 +0300 Message-Id: <1491573855-1039-2-git-send-email-Eugeniy.Paltsev@synopsys.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1491573855-1039-1-git-send-email-Eugeniy.Paltsev@synopsys.com> References: <1491573855-1039-1-git-send-email-Eugeniy.Paltsev@synopsys.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170407_070445_568616_4AF515A8 X-CRM114-Status: UNSURE ( 9.69 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [198.182.47.9 listed in list.dnswl.org] -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Andy Shevchenko , Vinod Koul , Alexey Brodkin , linux-kernel@vger.kernel.org, Rob Herring , Dan Williams , linux-snps-arc@lists.infradead.org, Eugeniy Paltsev MIME-Version: 1.0 Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org This patch adds documentation of device tree bindings for the Synopsys DesignWare AXI DMA controller. Signed-off-by: Eugeniy Paltsev Acked-by: Rob Herring --- .../devicetree/bindings/dma/snps,axi-dw-dmac.txt | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/snps,axi-dw-dmac.txt diff --git a/Documentation/devicetree/bindings/dma/snps,axi-dw-dmac.txt b/Documentation/devicetree/bindings/dma/snps,axi-dw-dmac.txt new file mode 100644 index 0000000..21666fe --- /dev/null +++ b/Documentation/devicetree/bindings/dma/snps,axi-dw-dmac.txt @@ -0,0 +1,34 @@ +* Synopsys DesignWare AXI DMA Controller + +Required properties: +- compatible: "snps,axi-dma-1.01a" +- reg: Address range of the DMAC registers. This should include + all of the per-channel registers. +- interrupt: Should contain the DMAC interrupt number. +- interrupt-parent: Should be the phandle for the interrupt controller + that services interrupts for this device. +- dma-channels: Number of channels supported by hardware. +- snps,dma-masters: Number of AXI masters supported by the hardware. +- snps,data-width: Maximum AXI data width supported by hardware. + (0 - 8bits, 1 - 16bits, 2 - 32bits, ..., 6 - 512bits) +- snps,priority: Priority of channel. Array size is equal to the number of + dma-channels. Priority value must be programmed within [0:dma-channels-1] + range. (0 - minimum priority) +- snps,block-size: Maximum block size supported by the controller channel. + Array size is equal to the number of dma-channels. + +Example: + +dmac: dma-controller@80000 { + compatible = "snps,axi-dma-1.01a"; + reg = <0x80000 0x400>; + clocks = <&core_clk>; + interrupt-parent = <&intc>; + interrupts = <27>; + + dma-channels = <4>; + snps,dma-masters = <2>; + snps,data-width = <3>; + snps,block-size = <4096 4096 4096 4096>; + snps,priority = <0 1 2 3>; +};