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R. Silva" , linux-amlogic@lists.infradead.org, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org References: <20260127-amlogic-dma-v2-0-4525d327d74d@amlogic.com> <20260127-amlogic-dma-v2-1-4525d327d74d@amlogic.com> From: Xianwei Zhao In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SG2PR02CA0091.apcprd02.prod.outlook.com (2603:1096:4:90::31) To TYZPR03MB6896.apcprd03.prod.outlook.com (2603:1096:400:289::14) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: TYZPR03MB6896:EE_|TYSPR03MB7912:EE_ X-MS-Office365-Filtering-Correlation-Id: 741663df-893a-4132-51e2-08de62340fd6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|7416014|376014|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?utf-8?B?R3ExT2VrdW8zNWhzeGdtWUdxYUlDYzVDK21oUUt5OTJUN01RRGp0c25VYlMv?= =?utf-8?B?a1I3cFVDblgra1oySnczTVBLaWZjVjkxOHhGeDZqeGRBNTRTWnNPd1NTb0h6?= =?utf-8?B?WVluWFk5c3U2UnVqUkw1eW5PL0hSNzFTcEE0RWtLM0dwRkdWSkZ4L2F0bVda?= =?utf-8?B?bWxWbzFBRWxuWXBoK09hQy9DOGhab1ltaGo1ZllERUk5aUNzZ0dxNm5SVUIw?= =?utf-8?B?QXE4Wk1uV2tSZzR6TFdqTlBncVB1Uzg2a1Y0cUFsMWlIVkd1WVI1cFVHQ1dk?= =?utf-8?B?eDF4WWtmdlNGY3dBcmt1MHNPZUFYcGtVbTQvdGl6RlBoNmlVcmdmSGRnME04?= =?utf-8?B?NnBoa0s5bnpxMkIvd3ZQOVdSZXNxdUdsaWlsQ1h0OHp4dVM1OUZWbmo5cnk0?= =?utf-8?B?R0tjTmtJaTIzRUVvSnFtUStDKzFxbHl1S3VtQzhWYlVKZklVaTB2Q3lTdmZO?= =?utf-8?B?TUVwbjFiMDl6dS9xT1ppSHlCT29iN0tpeVJOaENGTDR1eGNoMmZ0UGp3QW96?= =?utf-8?B?U1ZkQkJQRGU0QTVhWDlBNjhJWWYrSDNXb3dBMEhRRTFHVnVzR2VuQmtIWDRj?= =?utf-8?B?TkpMUC9jbk5Jd0NhUlV0b1l3Nks2SVZtV2Nvc3pzWE9paGwwM2RyTmdUekZP?= =?utf-8?B?UkVxemQ5QVVoZGVMT2xqaVd4MDJDaWdjZEVZQXIvK3Z1QkxHTEt1RkVYOG50?= =?utf-8?B?eHNyUGt4MThtbDluVVdNTE92bm9TRzZISGp1Mk1nck9TSzhBTXNNR1BOQ3c4?= =?utf-8?B?eHc0RGlKQmN5bjRkUXVTQnAxTjhPb0FZNFA3OUhVYklhaC9FR0I4bWZ2TGl2?= =?utf-8?B?cWFDbnBZM3RpcEVGS2t5bzNaanVCcUVTWG81bWRpaHU4cWx0cUJLVFBBVGVX?= =?utf-8?B?clluT2hLeGsvUnBkT1ZaQ0RWSkwwazc5RnlJbC9sWjZSQnBOSVlZN0lTdVRq?= =?utf-8?B?d0g3bStKYjBDMjJtanBlZ2oxK285WjdFMVdzY3h0ZElYVFFTR0FUVmpLeCs3?= =?utf-8?B?RHJ2bWtXeEE0eTNReXMzdjNLYkc1VkRqeFZ5aVRlNWlrc1JacENTTjNVZkN3?= =?utf-8?B?c0M5a3U0aWRwRGVBVHR3bEhsaDB4NEhhTDhTU1ZZbGdJUlRhamtzc1dYT2Fy?= =?utf-8?B?OXVuT3lKYXMxVDR0WEwwWGcwOU41Z2o0SGxDaE5FaUtzaXlocGtRY2gxYXYy?= =?utf-8?B?RmVWRlA1UmJVYmhJeU9qNnlWcG50c3lQdUkydWxVcWhoQXdNMWNQN1FtL1VZ?= =?utf-8?B?RE9rcHU5VXVaakdIbHkvMERMbFhXOHBZYXhpc0NRbnJnUjB6WTdPOTNNNW9v?= =?utf-8?B?MURQQVZuMHRhdWxkYWRKYTdyNW9NQjJMMTFzMzhvMVlDSzJPVmRKQ25YcHlp?= =?utf-8?B?cmUvR1RFR1A3RlY5eUN6aXFjaDJTdlBjM3VJcUZ3UjN3RUdLT3RWd3N2Y1hP?= =?utf-8?B?REtmVUJyTjMwdnZFa1oxNzVtQWJ3VkJRbWd4SzA0bUhuTXgyek1jNi83cjRp?= =?utf-8?B?UURCbDlESCtodkNteHNHWXM3UmRWYlliK0l2L2RqZU5CcVh5UURocy96cDIw?= =?utf-8?B?NkErbStsb2hmaUZXZk12SFlDYWF3ZzlrcGZYUDZVVDJsTFlVN2tMMmlsOWhs?= =?utf-8?B?djVCbG15V0ZQb1ZocGtjTWVIam9CcXpjeXlBWDY3QkNLaU5zcmJUaXBvYXFz?= =?utf-8?B?akRKRkQ5eHV4VjZNYXcrazdMUkZPbVRaZnY3dFA1bkJMR2RYN2NmK1h5dlZX?= =?utf-8?B?M0hwSUZxb1MyM0tEQ3cyekE1cFhKWXc4b2ovS0U1NFdiU2lLdjU2empUcWdl?= =?utf-8?B?N2pVSWFVRHhUMUNxZkJPOVYyaE9DRGxERi95cjRNdzFQM1V0c1luUVRyUG1w?= =?utf-8?B?R0lNeERtQnJDcEtZZFZyaE5XcTVraWhibEV4L1FLUi9hek5XQ1ZyR1dNQXBy?= =?utf-8?B?M1FsNHh6TERaTjl2em00UFY5ME9yL2hJWmhwQVlGNTI4Uks2RFNNYWlSYVJY?= =?utf-8?B?czljSzNYK2ZDY09BNzJsb0RRWHNZeFFkVnVpRW5EcEJYWjNmVnZPMUkvZVlv?= =?utf-8?Q?dHr7Q3?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:TYZPR03MB6896.apcprd03.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(366016)(7416014)(376014)(1800799024)(7053199007);DIR:OUT;SFP:1102; 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On 2026/1/30 01:54, Frank Li wrote: > [You don't often get email from frank.li@nxp.com. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > [ EXTERNAL EMAIL ] > > On Tue, Jan 27, 2026 at 03:27:52AM +0000, Xianwei Zhao wrote: >> Add documentation describing the Amlogic A9 SoC DMA. >> >> Signed-off-by: Xianwei Zhao >> --- >> .../devicetree/bindings/dma/amlogic,a9-dma.yaml | 70 ++++++++++++++++++++++ >> 1 file changed, 70 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/dma/amlogic,a9-dma.yaml b/Documentation/devicetree/bindings/dma/amlogic,a9-dma.yaml >> new file mode 100644 >> index 000000000000..7d044152fd76 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/dma/amlogic,a9-dma.yaml >> @@ -0,0 +1,70 @@ >> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause >> +%YAML 1.2 >> +--- >> +$id: http://devicetree.org/schemas/dma/amlogic,a9-dma.yaml# >> +$schema: http://devicetree.org/meta-schemas/core.yaml# >> + >> +title: Amlogic general DMA controller >> + >> +description: | > > Needn't | > Will drop '|' >> + This is a general-purpose peripheral DMA controller. It currently supports >> + major peripherals including I2C, I3C, PIO, and CAN-BUS. Transmit and receive >> + for the same peripheral use two separate channels, controlled by different >> + register sets. I2C and I3C transfer data in 1-byte units, while PIO and >> + CAN-BUS transfer data in 4-byte units. From the controller’s perspective, >> + there is no significant difference. >> + >> +maintainers: >> + - Xianwei Zhao >> + >> +properties: >> + compatible: >> + const: amlogic,a9-dma >> + >> + reg: >> + maxItems: 1 >> + >> + interrupts: >> + maxItems: 1 >> + >> + clocks: >> + maxItems: 1 >> + >> + clock-names: >> + const: sys >> + >> + '#dma-cells': >> + const: 2 >> + >> + dma-channels: >> + $ref: /schemas/types.yaml#/definitions/uint32 >> + maximum: 64 >> + >> +required: >> + - compatible >> + - reg >> + - interrupts >> + - clocks >> + - '#dma-cells' >> + - dma-channels >> + >> +allOf: >> + - $ref: dma-controller.yaml# >> + >> +unevaluatedProperties: false >> + >> +examples: >> + - | >> + #include >> + apb { >> + #address-cells = <2>; >> + #size-cells = <2>; > > If use 32 address space, needn't apb node > Will do. > Frank >> + dma-controller@fe400000{ >> + compatible = "amlogic,a9-dma"; >> + reg = <0x0 0xfe400000 0x0 0x4000>; >> + interrupts = ; >> + clocks = <&clkc 45>; >> + #dma-cells = <2>; >> + dma-channels = <28>; >> + }; >> + }; >> >> -- >> 2.52.0 >>