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Wed, 06 Feb 2019 12:58:04 -0800 (PST) X-Gm-Message-State: AHQUAuZy4dBlOBrAYCjXNVk0P2u5YzrIMQ+jy5QqgAGHGbgVaOZeVo4R txxhOhjzToQf3YHx3u3ravBI36QMR6Vgx77NDQ== X-Google-Smtp-Source: AHgI3IZ0eLGnTaLNOpY4JE6oz8hPOChfwuwrc8kANbEykIfaD0X5YtwGOEZe7PyYObuKrj9JuxqUx07Bpqa7vwpBMxQ= X-Received: by 2002:a0c:8c8a:: with SMTP id p10mr9361993qvb.218.1549486683865; Wed, 06 Feb 2019 12:58:03 -0800 (PST) MIME-Version: 1.0 References: <824396752ee40c8e4222fddb4a80408646989c17.1549482066.git-series.maxime.ripard@bootlin.com> In-Reply-To: <824396752ee40c8e4222fddb4a80408646989c17.1549482066.git-series.maxime.ripard@bootlin.com> From: Rob Herring Date: Wed, 6 Feb 2019 14:57:51 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v2 4/7] of: address: Add support for the dma-parent property To: Maxime Ripard X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190206_125807_087934_D63E1D9F X-CRM114-Status: GOOD ( 14.86 ) 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: Mark Rutland , devicetree@vger.kernel.org, Thomas Petazzoni , Arnd Bergmann , Robin Murphy , dri-devel , Georgi Djakov , Paul Kocialkowski , Chen-Yu Tsai , Yong Deng , Frank Rowand , Dave Martin , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Feb 6, 2019 at 1:42 PM Maxime Ripard wrote: > > Some SoCs have devices that are using a separate bus from the main bus to > perform DMA. > > These buses might have some restrictions and/or different mapping than from > the CPU side, so we'd need to express those using the usual dma-ranges, but > using a different DT node than the node's parent. > > Add support for a dma-parent property that links to the DMA bus used by the > device in such a case. ?? dma-parent is gone now, right? And I see #dma-parent-cells? Rob _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel