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7NpJlFchpaErV6WdFrXQjDAd9YwaEHucfS7SAhxIqdIqzV5vNFrMjwhB1N8MfdUJDpgyX7Zu k/Phd5aoZXNwsCRqaD2OwFZXr81zSXwE2UdPmIfTYTjeVsOAI7GZ7akCsRPK64ni0XfoXue2 XUSrUUTRimTkuMHrTYaHY3544a+GduQQLLA+avseLmjvKHxsU4zna0p0Yb4czwoJj+wSkVGQ NMDbxcY26CMPK204jhRm9RG687qq6691hbiuAtWABeAsl1AS+mdS7aP/4uOM4kFCvXYgIHxP /BoVz9CZTMEVAZVzbRKyYCLUf1wLhcHzugTiONz9fWMBLLskKvq7m1tlr61mNgY9nVwwClMU uE7i1H9r/2/UXLd+pY82zcXhFrfmKuCDmOkB5xPsOMVQJH8I0/lbqfLAqfsxSb/X1VKaP243 jzi+DzD9cvj2K6eD5j5kcKJJQactXqfJvF1Eb+OnxlB1BCLE8D1rNkPO5O742Mq3MgDmq19l +abzEL6QDAAxn9md8KwrA3RtucNh87cHlDXfUBKa7SRvBjTczDg+HEPNk2u3hrz1j3l2rliQ y1UfYx7Vk/TrdwUIJgKS8QAr8Lw9WuvY2hSqL9vEjx8VAkPWNWPwrQ== Message-ID: <4fc5f4b9-8f03-74b4-8bc9-bf86a6246ff0@gmail.com> Date: Fri, 19 Jun 2020 11:36:38 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <1592553902-30592-2-git-send-email-EastL.Lee@mediatek.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200619_023642_348328_CC1A9572 X-CRM114-Status: GOOD ( 20.00 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, wsd_upstream@mediatek.com, linux-kernel@vger.kernel.org, vkoul@kernel.org, robh+dt@kernel.org, linux-mediatek@lists.infradead.org, dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org 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 19/06/2020 10:04, EastL wrote: > Document the devicetree bindings for MediaTek Command-Queue DMA controller > which could be found on MT6779 SoC or other similar Mediatek SoCs. > > Signed-off-by: EastL Still missing the full name. > --- > .../devicetree/bindings/dma/mtk-cqdma.yaml | 114 +++++++++++++++++++++ > 1 file changed, 114 insertions(+) > create mode 100644 Documentation/devicetree/bindings/dma/mtk-cqdma.yaml > > diff --git a/Documentation/devicetree/bindings/dma/mtk-cqdma.yaml b/Documentation/devicetree/bindings/dma/mtk-cqdma.yaml > new file mode 100644 > index 0000000..e6fdf05 > --- /dev/null > +++ b/Documentation/devicetree/bindings/dma/mtk-cqdma.yaml > @@ -0,0 +1,114 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause You missed the brackets (). > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/dma/mtk-cqdma.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: MediaTek Command-Queue DMA controller Device Tree Binding > + > +maintainers: > + - EastL Lee > + > +description: > + MediaTek Command-Queue DMA controller (CQDMA) on Mediatek SoC > + is dedicated to memory-to-memory transfer through queue based > + descriptor management. > + > +allOf: > + - $ref: "dma-controller.yaml#" > + > +properties: > + "#dma-cells": > + minimum: 1 > + maximum: 255 > + description: > + Used to provide DMA controller specific information. > + > + compatible: > + oneOf: > + - const: mediatek,common-cqdma What is the common-cqdma for if we have only one compatible specifying the SoC. Actually I'm not a great fan of the common-cqdma thing. I'd prefer a fallback compatible that has the name of the first SoC implementing the same device. Regards, Matthias > + - const: mediatek,mt6765-cqdma > + - const: mediatek,mt6779-cqdma > + > + reg: > + minItems: 1 > + maxItems: 5 > + description: > + A base address of MediaTek Command-Queue DMA controller, > + a channel will have a set of base address. > + > + interrupts: > + minItems: 1 > + maxItems: 5 > + description: > + A interrupt number of MediaTek Command-Queue DMA controller, > + one interrupt number per dma-channels. > + > + clocks: > + maxItems: 1 > + > + clock-names: > + const: cqdma > + > + dma-channel-mask: > + $ref: /schemas/types.yaml#definitions/uint32 > + description: > + For DMA capability, We will know the addressing capability of > + MediaTek Command-Queue DMA controller through dma-channel-mask. > + items: > + minItems: 1 > + maxItems: 63 > + > + dma-channels: > + $ref: /schemas/types.yaml#definitions/uint32 > + description: > + Number of DMA channels supported by MediaTek Command-Queue DMA > + controller, support up to five. > + items: > + minItems: 1 > + maxItems: 5 > + > + dma-requests: > + $ref: /schemas/types.yaml#definitions/uint32 > + description: > + Number of DMA request (virtual channel) supported by MediaTek > + Command-Queue DMA controller, support up to 32. > + items: > + minItems: 1 > + maxItems: 32 > + > +required: > + - "#dma-cells" > + - compatible > + - reg > + - interrupts > + - clocks > + - clock-names > + - dma-channel-mask > + - dma-channels > + - dma-requests > + > +additionalProperties: false > + > +examples: > + - | > + #include > + #include > + #include > + cqdma: dma-controller@10212000 { > + compatible = "mediatek,mt6779-cqdma"; > + reg = <0x10212000 0x80>, > + <0x10212080 0x80>, > + <0x10212100 0x80>; > + interrupts = , > + , > + ; > + clocks = <&infracfg_ao CLK_INFRA_CQ_DMA>; > + clock-names = "cqdma"; > + dma-channel-mask = <63>; > + dma-channels = <3>; > + dma-requests = <32>; > + #dma-cells = <1>; > + }; > + > +... > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel