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Date: Wed, 21 Dec 2022 09:22:04 +0100 From: Michael Walle <michael@...le.cc> To: Guenter Roeck <linux@...ck-us.net> Cc: Sudip Mukherjee <sudip.mukherjee@...ive.com>, Tudor Ambarus <tudor.ambarus@...rochip.com>, Pratyush Yadav <pratyush@...nel.org>, Miquel Raynal <miquel.raynal@...tlin.com>, Richard Weinberger <richard@....at>, Vignesh Raghavendra <vigneshr@...com>, greentime.hu@...ive.com, jude.onyenegecha@...ive.com, william.salmon@...ive.com, adnan.chowdhury@...ive.com, ben.dooks@...ive.com, linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3 1/2] mtd: spi-nor: issi: is25wp256: Init flash based on SFDP Hi, Am 2022-12-21 01:30, schrieb Guenter Roeck: > With this patch in place, qemu emulations with is25wp256 fail to > instantiate the flash. Specifically, this affects the qemu sifive_u > emulation. The resulting error message is: > > spi-nor spi0.0: BFPT parsing failed. Please consider using > SPI_NOR_SKIP_SFDP when declaring the flash > spi-nor: probe of spi0.0 failed with error -22 qemu is to blame here. It doesn't fully emulate the flash. Esp. not the SFDP tables. See also [1]. Adding the .sfdp_read hook with the corresponding binary [2] should fix your issue. [1] https://lore.kernel.org/qemu-devel/7827c791b7f91f4eb216b33473dd6103@walle.cc/ [2] https://lore.kernel.org/linux-mtd/CAHyZL-ch=mr0x_19e6P9G+Z4sW2iJXW9nTnXUNAhn+pTptN2ww@mail.gmail.com/ -michael
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