From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752075AbdBJIZS (ORCPT ); Fri, 10 Feb 2017 03:25:18 -0500 Received: from smtprelay.synopsys.com ([198.182.47.9]:55142 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751652AbdBJIXo (ORCPT ); Fri, 10 Feb 2017 03:23:44 -0500 From: Alexey Brodkin To: "vinod.koul@intel.com" CC: "linux-kernel@vger.kernel.org" , "robh+dt@kernel.org" , "devicetree@vger.kernel.org" , "linux-snps-arc@lists.infradead.org" , Eugeniy Paltsev , "dan.j.williams@intel.com" , "mark.rutland@arm.com" , "dmaengine@vger.kernel.org" , "andriy.shevchenko@linux.intel.com" Subject: Re: [PATCH 2/2] dmaengine: Add DW AXI DMAC driver Thread-Topic: [PATCH 2/2] dmaengine: Add DW AXI DMAC driver Thread-Index: AQHSdyCHPjTEnJk710S0hX+rDlkPPqFhyIMAgAAmUAA= Date: Fri, 10 Feb 2017 08:23:15 +0000 Message-ID: <1486714994.7530.11.camel@synopsys.com> References: <1485358457-22957-1-git-send-email-Eugeniy.Paltsev@synopsys.com> <1485358457-22957-3-git-send-email-Eugeniy.Paltsev@synopsys.com> <20170210060606.GO19244@localhost> In-Reply-To: <20170210060606.GO19244@localhost> Accept-Language: en-US, ru-RU Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.225.15.124] Content-Type: text/plain; charset="utf-8" Content-ID: <9225940094A559439E8A81D2067EA431@internal.synopsys.com> MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id v1A8RClU002008 Hi Vinod, On Fri, 2017-02-10 at 11:36 +0530, Vinod Koul wrote: > On Wed, Jan 25, 2017 at 06:34:17PM +0300, Eugeniy Paltsev wrote: > > > > This patch adds support for the DW AXI DMAC controller. > > > > DW AXI DMAC is a part of upcoming development board from Synopsys. > > How different is AXI from DW Synopsys? These are 2 completely unrelated products from Synopsys, see:  a) https://www.synopsys.com/dw/ipdir.php?ds=amba_ahb_dma  b) https://www.synopsys.com/dw/ipdir.php?ds=amba_axi_dma > Is the spec publicly available? I'm afraid not. Synopsys customers may get DW AXI DMAC databook here: https://www.synopsys.com/dw/doc.php/iip/DW_axi_dmac/latest/doc/DW_axi_dmac_databook.pdf Just a side note "DW" prefix stands for DesignWare and applicable to most if not all IP libs from Synopsys so here we're talking about AHB DMAC vs AXI DMAC. Still my understanding is different bus type is not the one and only difference but just the one which might simplify selection of one or another IP block. -Alexey