From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: [PATCH v2 1/1] dt-bindings: dmaengine: Add MediaTek Command-Queue DMA controller bindings Date: Thu, 14 Feb 2019 15:54:52 +0800 Message-ID: <1550130892-19488-2-git-send-email-shun-chih.yu@mediatek.com> References: <1550130892-19488-1-git-send-email-shun-chih.yu@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1550130892-19488-1-git-send-email-shun-chih.yu@mediatek.com> Sender: linux-kernel-owner@vger.kernel.org To: Sean Wang , Vinod Koul , Rob Herring , Matthias Brugger , Dan Williams Cc: dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, srv_wsdupstream@mediatek.com, Shun-Chih Yu List-Id: devicetree@vger.kernel.org From: Shun-Chih Yu Document the devicetree bindings for MediaTek Command-Queue DMA controller which could be found on MT6765 SoC or other similar Mediatek SoCs. Signed-off-by: Shun-Chih Yu Reviewed-by: Rob Herring Acked-by: Sean Wang --- .../devicetree/bindings/dma/mtk-cqdma.txt | 31 ++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/mtk-cqdma.txt diff --git a/Documentation/devicetree/bindings/dma/mtk-cqdma.txt b/Documentation/devicetree/bindings/dma/mtk-cqdma.txt new file mode 100644 index 0000000..fb12927 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/mtk-cqdma.txt @@ -0,0 +1,31 @@ +MediaTek Command-Queue DMA Controller +================================== + +Required properties: + +- compatible: Must be "mediatek,mt6765-cqdma" for MT6765. +- reg: Should contain the base address and length for each channel. +- interrupts: Should contain references to the interrupts for each channel. +- clocks: Should be the clock specifiers corresponding to the entry in + clock-names property. +- clock-names: Should contain "cqdma" entries. +- dma-channels: The number of DMA channels supported by the controller. +- dma-requests: The number of DMA request supported by the controller. +- #dma-cells: The length of the DMA specifier, must be <1>. This one cell + in dmas property of a client device represents the channel + number. +Example: + + cqdma: dma-controller@10212000 { + compatible = "mediatek,mt6765-cqdma"; + reg = <0 0x10212000 0 0x1000>; + interrupts = , + ; + clocks = <&infracfg CLK_IFR_CQ_DMA>; + clock-names = "cqdma"; + dma-channels = <2>; + dma-requests = <32>; + #dma-cells = <1>; + }; + +DMA clients must use the format described in dma/dma.txt file. -- 1.7.9.5