From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2CF1D372EF5 for ; Mon, 13 Jul 2026 09:12:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783933938; cv=none; b=Q/juqzcmsU4Svr+tGQE+LPaWJfVHM8ZKKBffQIIsQHJHNJHqQp4eJ4rdQvhwmdt5nTjxWjlHNxBcc6JP+IadMGrmGKmW5YaOHJ2pCUPdldTNhHhI0IeXz+oci84z0KYvEx/XJZMC66h/PCcVa2mb9ODxs2Kq8dEJvmyL9JoA6Is= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783933938; c=relaxed/simple; bh=ae2+Jamwd6VDEbwmBP+mQmB/ZSjwZ8PAEFkIhzDeLv8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=OhIiC/D2191cuZ18sbK8KPHGZ7g/QW4k4cEwzpiUZklh0kPkw7/Rmni6WqgDmrT3VpYkmbucqSck6B1I4UxUHhwIzqVUPKcB5WOJTaDbgVR/dkdGmaU7AWNWbBRxUtjJsBEkscwzgSoBnj3FhNw5dbaY5FBxibOn9kGf6IIoZms= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lTVCN7az; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lTVCN7az" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7919E1F000E9; Mon, 13 Jul 2026 09:12:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783933935; bh=TiL28kGObEAGAIyeXoG8tSeerUHzkraHChIcpDKfoLY=; h=From:To:Cc:Subject:Date; b=lTVCN7azRalMOftvPNMVCdFvnrcSwieoB12HcEnMgzdaRy1sbrHCiegvHG0N9vo4d gA7MWYiLMLrZXS0LablJwG6Mo5nPnaIjy2pT6y8ZelTA7w7UlJAuCg1ONsNvwLhuS0 SiXiRQGjMSCdbMSs3kTs8vRnDBf69SXtVM32hi3ARFwJXJaPp8Czn1DbXArqc7INDO zJrLRqE3GO555G++rc3e4j721rtRwngASfBIMoD+oCvJHvAnKOczj852LDiYK2QSxZ mnHrtXIPunWPAJvDJ80o6ou+pMNTDar69E5i4VS7k5w23NUPAcw9RA6wNpCc/0jM+O nGCR6RNR2dEAg== From: Michael Walle To: Pratyush Yadav , Michael Walle , Takahiro Kuwano , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Tudor Ambarus Cc: linux-mtd@lists.infradead.org, Cheng Ming Lin , linux-kernel@vger.kernel.org Subject: [PATCH v2 0/8] mtd: spi-nor: Rework flash parameter initialization Date: Mon, 13 Jul 2026 11:11:38 +0200 Message-ID: <20260713091206.2414400-1-mwalle@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Try to simplify the flash initialization and get rid of the legacy handling. As default, all the flags of the in-kernel database are taken and amended with the SFDP data. This might have the consequence that all the flashes now get a RDSFPD opcode which might be an unknown opcode. But that was already the case for any flashes which were unknown to the linux kernel. So far, there was not a single complaint. See patch 8 for more information. Sashiko found that not everything is rolled back in case of a SFDP parsing failure. Thus there are now 5 additional patches which will move the discovered parameters into spi_nor_flash_parameter which is rolled back. The new rule is now: SFDP parsing and the per-flash SFDP fixups must only change the spi_nor_flash_parameter data. changes since v1: - collected Tb and Rb tags - Fixed the roll-back issue Sashiko found, we now keep two backups for the parameters. - Link to v1: https://lore.kernel.org/linux-mtd/20260703143003.1809579-1-mwalle@kernel.org/ changes since the RFC: - new patches to address the rollback issue, as pointed out by Sashiko - remove SKIP_SFDP from kerneldoc, as pointed out by Sashiko - mention issuing the potential unsupported RDSFPD command in the commit message, as pointed out by Tudor - Link to the RFC: https://lore.kernel.org/linux-mtd/20260601125438.3481722-1-mwalle@kernel.org/ Michael Walle (8): mtd: spi-nor: spansion: s25fl256s0: remove SKIP_SFDP flag mtd: spi-nor: don't clear the SNOR_F_4B_OPCODES flag on failure mtd: spi-nor: move cmd_ext_type into spi_nor_flash_parameter mtd: spi-nor: move flags into spi_nor_flash_parameter mtd: spi-nor: move spi_nor_post_bfpt_fixups() into sfdp mtd: spi-nor: spansion: s25fs256t: move ARCFN check into .late_init mtd: spi-nor: push the rollback mechanism into the sfdp module mtd: spi-nor: rework flash parameter initialization drivers/mtd/spi-nor/core.c | 178 +++++++++++--------------------- drivers/mtd/spi-nor/core.h | 13 +-- drivers/mtd/spi-nor/debugfs.c | 6 +- drivers/mtd/spi-nor/macronix.c | 2 +- drivers/mtd/spi-nor/micron-st.c | 8 +- drivers/mtd/spi-nor/sfdp.c | 70 ++++++++++--- drivers/mtd/spi-nor/spansion.c | 36 ++++--- drivers/mtd/spi-nor/swp.c | 52 ++++++---- drivers/mtd/spi-nor/winbond.c | 4 +- include/linux/mtd/spi-nor.h | 4 - 10 files changed, 185 insertions(+), 188 deletions(-) -- 2.47.3