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[106.168.128.197]) by smtp.gmail.com with ESMTPSA id t3-20020a17090b018300b00266a21984b0sm783105pjs.31.2023.07.18.00.07.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Jul 2023 00:07:02 -0700 (PDT) Message-ID: <4917c61b-7f08-44f4-5a14-3443349e3277@gmail.com> Date: Tue, 18 Jul 2023 16:06:59 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: [PATCH 3/5] mtd: spi-nor: spansion: Add MCP support in octal_dtr_enable() To: Michael Walle , miquel.raynal@bootlin.com Cc: linux-mtd@lists.infradead.org, tudor.ambarus@linaro.org, pratyush@kernel.org, richard@nod.at, vigneshr@ti.com, d-gole@ti.com, Bacem.Daassi@infineon.com, Takahiro Kuwano References: Content-Language: en-US From: Takahiro Kuwano In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230718_080817_115857_9FC75561 X-CRM114-Status: GOOD ( 13.24 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Hi Michael, On 7/18/2023 7:49 AM, Michael Walle wrote: > Hi Takahiro, Hi Miquel, > >> S28HS02GT is multi-chip package (MCP) device that requires Octal DTR >> configuraion for each die. We can access to configuration registers in each >> die by using params->n_dice and params->vreg_offset[] populated from SFDP. > > I'm looking into cleaning up the flash db and come across the n_banks > and n_dice parameter. Which sounds like they seem to be similar, maybe > identical? Unfortunately, there is no public datasheet for the macronix > flash.. IIRC there is one for the Semperflashes but I'm not sure if there > is one for the MCP parts. > Could we somehow clarify if these are the same properties? I've looked at > the SFDP tables of the macronix flash and they don't have the SCCR map for > multi chip devices :/ > > -michael The n_banks and n_dice are different properties. One die can contain multiple banks. Infineon does not have multi-bank parts that support RWW. The SEMPER MCP parts do not support RWW on different die. Thanks, Takahiro ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/