Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933921AbdDGOFQ (ORCPT ); Fri, 7 Apr 2017 10:05:16 -0400 Received: from us01smtprelay-2.synopsys.com ([198.182.47.9]:44054 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933786AbdDGOEd (ORCPT ); Fri, 7 Apr 2017 10:04:33 -0400 From: Eugeniy Paltsev To: dmaengine@vger.kernel.org Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-snps-arc@lists.infradead.org, Dan Williams , Vinod Koul , Rob Herring , Andy Shevchenko , Alexey Brodkin , Eugeniy Paltsev 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> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1963 Lines: 52 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>; +}; -- 2.5.5