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[31.10.206.125]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9e564e8e6esm569618766b.94.2024.11.04.07.19.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Nov 2024 07:19:12 -0800 (PST) Date: Mon, 4 Nov 2024 16:19:10 +0100 From: Parth Pancholi To: Tudor Ambarus , Pratyush Yadav , Michael Walle , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra Cc: Parth Pancholi , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mtd: spi-nor: macronix: enable dual and quad read for MX25U25635F Message-ID: References: <20241024114021.17567-1-parth105105@gmail.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241104_071915_057898_2577FF15 X-CRM114-Status: GOOD ( 31.94 ) 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; 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[31.10.206.125]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9e564e8e6esm569618766b.94.2024.11.04.07.19.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 Nov 2024 07:19:12 -0800 (PST) Date: Mon, 4 Nov 2024 16:19:10 +0100 From: Parth Pancholi To: Tudor Ambarus , Pratyush Yadav , Michael Walle , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra Cc: Parth Pancholi , linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] mtd: spi-nor: macronix: enable dual and quad read for MX25U25635F Message-ID: References: <20241024114021.17567-1-parth105105@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Tue, Oct 29, 2024 at 07:33:01AM +0000, Tudor Ambarus wrote: > > > On 10/24/24 12:40 PM, Parth Pancholi wrote: > > From: Parth Pancholi > > > > The MX25U25635F supports dual and quad read operations. Set the > > corresponding flags to enable these features in accordance with > > the hardware capabilities. This change also enables dual and quad > > read operations on the MX25U25645G, which shares the same ID and > > has a superset of the functionality provided by the MX25U25635F. > > > > Link: https://www.macronix.com/Lists/Datasheet/Attachments/8663/MX25U25635F,%201.8V,%20256Mb,%20v1.5.pdf > > Looks like the flash defines SFDP tables "Table 13. Parameter Table (0): > JEDEC Flash Parameter Tables". > > We have some minimum testing requirements, please see them on > https://docs.kernel.org/driver-api/mtd/spi-nor.html > > > Signed-off-by: Parth Pancholi > > --- > > drivers/mtd/spi-nor/macronix.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/mtd/spi-nor/macronix.c b/drivers/mtd/spi-nor/macronix.c > > index ea6be95e75a5..be55558c8ad0 100644 > > --- a/drivers/mtd/spi-nor/macronix.c > > +++ b/drivers/mtd/spi-nor/macronix.c > > @@ -129,7 +129,7 @@ static const struct flash_info macronix_nor_parts[] = { > > .id = SNOR_ID(0xc2, 0x25, 0x39), > > .name = "mx25u25635f", > > .size = SZ_32M, > > if we want to switch to SFDP initialized params then we can remove the size > > > - .no_sfdp_flags = SECT_4K, > > + .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ, > > and this line as well. > > > .fixup_flags = SPI_NOR_4B_OPCODES, > > If the flash defines the 4bait table (I don't see it in datasheet > though), then this line as well. We may remove the entire entry and rely > solely on the generic flash driver. > > > }, { > > .id = SNOR_ID(0xc2, 0x25, 0x3a), Thank you for the review, Tudor. I performed a quick test on the mx25u25645g (sharing the same ID as mx25u25635f) connected at TI AM69 device’s QSPI, removing the mx25u25635f entry to rely exclusively on the generic flash driver as suggested. So far, I did not see issue. I’ll perform additional tests and submit v2 with the mx25u25635f entry removed, along with minimal test logs. Parth P