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Received-SPF: Pass (protection.outlook.com: domain of cixtech.com designates 222.71.101.198 as permitted sender) receiver=protection.outlook.com; client-ip=222.71.101.198; helo=smtprelay.cixcomputing.com; pr=C Received: from smtprelay.cixcomputing.com (222.71.101.198) by OSA0EPF000000CA.mail.protection.outlook.com (10.167.240.56) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.569.4 via Frontend Transport; Thu, 29 Oct 2026 05:18:37 +0000 Received: from ubuntu (unknown [172.20.64.99]) by smtprelay.cixcomputing.com (Postfix) with ESMTPSA id C744D4102B51; Thu, 29 Oct 2026 13:18:35 +0800 (CST) Date: Thu, 29 Oct 2026 13:18:34 +0800 From: Jelly Jia To: Frank Li Cc: vkoul@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, robin.murphy@arm.com, sboyd@kernel.org, bmasney+clk@redhat.com, jbrunet+clk@baylibre.com, devicetree@vger.kernel.org, Frank.Li@kernel.org, cix-kernel-upstream@cixtech.com, dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, joakim.zhang@cixtech.com Subject: Re: [PATCH v1 4/5] dmaengine: arm-dma350: Honour dma-channel-mask Message-ID: References: <20261023093045.3248630-1-Jelly.Jia@cixtech.com> <20261023093045.3248630-5-Jelly.Jia@cixtech.com> X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: ypBSLJAiRVpI1920V7IyiGKDWuxWrPlCZG5lqGEoKtYCJIev0CYWtUxhDCmoP9N/0BC4oJO5Ai3FKJ+9qZiZH4EWWJUpT4Xg2mIdZ2hC4ChveXTendFUQB9RYAHFYEddu5Yeot0iBsKRvB+d4vj9whsLQlDTYVJWi9GMxTniVWR+HYW/xHk2Q1A04SXCKBSm8p3PyRGui9kbDx4827+LaRaW2szB9Fu+3hg4m4jSdZIGI/rUjiIhU7mXaGerYfpnFBSKq+cjTLqL79gL6F5sOtjY29kxBUndORBE/NeBUTx3Vc8uG7MgQT6o6B7YAvUVRtxhTUHZ0Rh5xUU0BkLpdUNpOrlyO6Flg0XDsgAu0WQlR/4Imaba9Axna452kpCd9NipG2mUFCJNWLuTIjI3CHJ8/tM8Hwy6CS9lZk9K+btHWX67rYDw36USkprL63Im X-OriginatorOrg: cixtech.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Oct 2026 05:18:37.1797 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2f236fd3-481d-4f28-4a9c-08df357c1660 X-MS-Exchange-CrossTenant-Id: 0409f77a-e53d-4d23-943e-ccade7cb4811 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=0409f77a-e53d-4d23-943e-ccade7cb4811;Ip=[222.71.101.198];Helo=[smtprelay.cixcomputing.com] X-MS-Exchange-CrossTenant-AuthSource: OSA0EPF000000CA.apcprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: OSQPR06MB7183 Hi Frank, On Wed, Oct 28, 2026 at 12:47:38PM -0400, Frank Li wrote: > dma-channel-mask is u32 array. If nchan >= 32, you should check > dma-channel-mask[1]. Thanks for reviewing. Yes, the common property is a u32 array. For DMA-350, however, the TRM specifies: "Number of DMA channels between 1 and 8 (NUM_CHANNELS)". A single u32 therefore covers all supported channels, and patch 3/5 also restricts dma-channel-mask to maxItems: 1. Best regards, Jelly