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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-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: OSA0EPF000000CA:EE_|OSQPR06MB7183:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f236fd3-481d-4f28-4a9c-08df357c1660 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|23010399003|1800799024|376014|7416014|18002099003|22082099003|56012099006|4143699003|10067099003; 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X-Spam-Score: -1.9 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-3.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_EF,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 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