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Wed, 23 Jul 2025 10:16:47 +0200 (MEST) Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 0333040052; Wed, 23 Jul 2025 10:15:25 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node2.st.com [10.75.129.70]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 4550876DBF4; Wed, 23 Jul 2025 10:14:14 +0200 (CEST) Received: from [10.48.86.185] (10.48.86.185) by SHFDAG1NODE2.st.com (10.75.129.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Wed, 23 Jul 2025 10:14:13 +0200 Message-ID: <608d03ef-1017-4f82-b7b0-a461c35b59a2@foss.st.com> Date: Wed, 23 Jul 2025 10:14:12 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 07/19] dt-bindings: memory: factorise LPDDR channel binding into memory channel To: Krzysztof Kozlowski CC: Will Deacon , Mark Rutland , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Alexandre Torgue , Philipp Zabel , Jonathan Corbet , Gatien Chevallier , Michael Turquette , Stephen Boyd , Gabriel Fernandez , Le Goffic , Julius Werner , , , , , , , References: <20250722-ddrperfm-upstream-v3-0-7b7a4f3dc8a0@foss.st.com> <20250722-ddrperfm-upstream-v3-7-7b7a4f3dc8a0@foss.st.com> <20250723-zealous-turtle-of-perfection-e67aee@kuoka> <5ca3ba94-27b3-4cda-aba4-e2935acbe55c@kernel.org> Content-Language: en-US From: Clement LE GOFFIC In-Reply-To: <5ca3ba94-27b3-4cda-aba4-e2935acbe55c@kernel.org> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SHFCAS1NODE2.st.com (10.75.129.73) To SHFDAG1NODE2.st.com (10.75.129.70) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-07-23_01,2025-07-22_01,2025-03-28_01 Hi, On 7/23/25 09:06, Krzysztof Kozlowski wrote: > On 23/07/2025 08:57, Krzysztof Kozlowski wrote: >> On Tue, Jul 22, 2025 at 04:03:24PM +0200, Clément Le Goffic wrote: >>> LPDDR and DDR channels exist and share the same properties, they have a >>> compatible, ranks, and an io-width. >> >> Maybe it is true for all types of SDRAM, like RDRAM and eDRAM, but I > > > Although these were not JEDEC probably... Hmm so no "sdram-channel" ? I don't get your point here. > >> don't think all memory types do. >> >> I think this should be renamed to sdram-channel. > ... yet still JEDEC also has some standards for SRAM, EPROM, HBM and > SGRAM (graphics), see: > https://www.jedec.org/category/technology-focus-area/memory-configurations-jesd21-c In a more generic point of view we can think compatible, density and io- width as common for all sort of memory no ? > > Best regards, > Krzysztof