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Fri, 15 Dec 2023 02:33:03 -0800 (PST) Received: from [192.168.2.107] ([79.115.63.202]) by smtp.gmail.com with ESMTPSA id d13-20020a05600c34cd00b0040c496c64cfsm18468670wmq.12.2023.12.15.02.33.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 Dec 2023 02:33:03 -0800 (PST) Message-ID: Date: Fri, 15 Dec 2023 10:33:00 +0000 Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 07/10] mtd: spi-nor: Add stacked memories support in spi-nor Content-Language: en-US To: "Mahapatra, Amit Kumar" , "broonie@kernel.org" , "pratyush@kernel.org" , "miquel.raynal@bootlin.com" , "richard@nod.at" , "vigneshr@ti.com" , "sbinding@opensource.cirrus.com" , "lee@kernel.org" , "james.schulman@cirrus.com" , "david.rhodes@cirrus.com" , "rf@opensource.cirrus.com" , "perex@perex.cz" , "tiwai@suse.com" Cc: "linux-spi@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "michael@walle.cc" , "linux-mtd@lists.infradead.org" , "nicolas.ferre@microchip.com" , "alexandre.belloni@bootlin.com" , "claudiu.beznea@tuxon.dev" , "Simek, Michal" , "linux-arm-kernel@lists.infradead.org" , "alsa-devel@alsa-project.org" , "patches@opensource.cirrus.com" , "linux-sound@vger.kernel.org" , "git (AMD-Xilinx)" , "amitrkcian2002@gmail.com" References: <20231125092137.2948-1-amit.kumar-mahapatra@amd.com> <20231125092137.2948-8-amit.kumar-mahapatra@amd.com> <5a6f6764-6779-42b0-b6c6-3f638b85ef78@linaro.org> From: Tudor Ambarus In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 12/15/23 10:02, Mahapatra, Amit Kumar wrote: > Hello Tudor, Hi, > >> -----Original Message----- >> From: Tudor Ambarus >> Sent: Friday, December 15, 2023 1:40 PM >> To: Mahapatra, Amit Kumar ; >> broonie@kernel.org; pratyush@kernel.org; miquel.raynal@bootlin.com; >> richard@nod.at; vigneshr@ti.com; sbinding@opensource.cirrus.com; >> lee@kernel.org; james.schulman@cirrus.com; david.rhodes@cirrus.com; >> rf@opensource.cirrus.com; perex@perex.cz; tiwai@suse.com >> Cc: linux-spi@vger.kernel.org; linux-kernel@vger.kernel.org; >> michael@walle.cc; linux-mtd@lists.infradead.org; >> nicolas.ferre@microchip.com; alexandre.belloni@bootlin.com; >> claudiu.beznea@tuxon.dev; Simek, Michal ; linux- >> arm-kernel@lists.infradead.org; alsa-devel@alsa-project.org; >> patches@opensource.cirrus.com; linux-sound@vger.kernel.org; git (AMD- >> Xilinx) ; amitrkcian2002@gmail.com >> Subject: Re: [PATCH v11 07/10] mtd: spi-nor: Add stacked memories support >> in spi-nor >> >> >> >> On 15.12.2023 09:55, Mahapatra, Amit Kumar wrote: >>>> Thanks! Can you share with us what flashes you used for testing in >>>> the stacked and parallel configurations? >>> I used SPI-NOR QSPI flashes for testing stacked and parallel. >> >> I got that, I wanted the flash name or device ID. > > N25Q00A, MX66U2G45G, IS25LP01G & W25H02JV are some of the QSPI flashes on > which we tested. Additionally, we conducted tests on over 30 different > QSPI flashes from four distinct vendors (Miron, Winbond, Macronix, and ISSI). > Great. >> What I'm interested is if each flash is in its own package. Are they? > > I'm sorry, but I don't quite understand what you mean by "if each flash in > its own package." > There are flashes that are stacked at the physical level. It's a single flash with multiple dies, that are all under a single physical package. As I understand, your stacked flash model is at logical level. You have 2 flashes each in its own package. 2 different entities. Is my understanding correct? Cheers, ta