From patchwork Wed Sep 13 08:28:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "guomengqi (A)" X-Patchwork-Id: 13382598 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08C96CA550A for ; Wed, 13 Sep 2023 08:37:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238971AbjIMIiA (ORCPT ); Wed, 13 Sep 2023 04:38:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238967AbjIMIh6 (ORCPT ); Wed, 13 Sep 2023 04:37:58 -0400 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE72E196; Wed, 13 Sep 2023 01:37:54 -0700 (PDT) Received: from kwepemm600013.china.huawei.com (unknown [172.30.72.54]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Rltyd72WwztSQ2; Wed, 13 Sep 2023 16:33:45 +0800 (CST) Received: from huawei.com (10.175.112.208) by kwepemm600013.china.huawei.com (7.193.23.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.31; Wed, 13 Sep 2023 16:37:51 +0800 From: Guo Mengqi To: , , , , , CC: , , Subject: [PATCH v4 2/2] dt-bindings: dma: HiSilicon: Add bindings for HiSilicon Ascend sdma Date: Wed, 13 Sep 2023 16:28:25 +0800 Message-ID: <20230913082825.3180-3-guomengqi3@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230913082825.3180-1-guomengqi3@huawei.com> References: <20230913082825.3180-1-guomengqi3@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.112.208] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600013.china.huawei.com (7.193.23.68) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Add device-tree binding documentation for sdma hardware on HiSilicon Ascend SoC families. Signed-off-by: Guo Mengqi --- .../bindings/dma/hisilicon,ascend-sdma.yaml | 74 +++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/hisilicon,ascend-sdma.yaml diff --git a/Documentation/devicetree/bindings/dma/hisilicon,ascend-sdma.yaml b/Documentation/devicetree/bindings/dma/hisilicon,ascend-sdma.yaml new file mode 100644 index 000000000000..9a3f8b701395 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/hisilicon,ascend-sdma.yaml @@ -0,0 +1,74 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/hisilicon,ascend-sdma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: HiSilicon Ascend System DMA (SDMA) controller + +description: | + The Ascend SDMA controller is used for transferring data + in system memory. + +maintainers: + - Guo Mengqi + +allOf: + - $ref: dma-controller.yaml# + +properties: + compatible: + enum: + - hisilicon,ascend310-sdma + - hisilicon,ascend910-sdma + + reg: + maxItems: 1 + + '#dma-cells': + const: 1 + description: + Clients specify a single cell with channel number. + + dma-channel-mask: + minItems: 1 + maxItems: 2 + + iommus: + maxItems: 1 + + pasid-num-bits: + description: | + This tells smmu that this device supports iommu-sva feature. + This determines the maximum number of digits in the pasid. + maximum: 0x10 + + dma-coherent: true + + dma-can-stall: true + +required: + - compatible + - reg + - dma-channel-mask + - '#dma-cells' + - iommus + - pasid-num-bits + - dma-can-stall + +additionalProperties: false + +examples: + - | + dma-controller@880e0000 { + compatible = "hisilicon,ascend310-sdma"; + reg = <0x880e0000 0x10000>; + dma-channel-mask = <0xff00>; + iommus = <&smmu 0x7f46>; + pasid-num-bits = <0x10>; + dma-coherent; + dma-can-stall; + #dma-cells = <1>; + }; + +...