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[93.89.165.28]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-459e075805csm104393635e9.4.2025.08.06.11.40.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 06 Aug 2025 11:40:18 -0700 (PDT) Message-ID: <25dcf103-3cd3-400a-b402-cbb5f23006c9@gmail.com> Date: Wed, 6 Aug 2025 20:40:21 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mtd: expose ooblayout information via sysfs Content-Language: hu To: Miquel Raynal Cc: Richard Weinberger , Vignesh Raghavendra , linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org References: <20250719-mtd-ooblayout-sysfs-v1-1-e0d68d872e17@gmail.com> <87tt2ley48.fsf@bootlin.com> From: Gabor Juhos In-Reply-To: <87tt2ley48.fsf@bootlin.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Miquel, 2025. 08. 06. 8:57 keltezéssel, Miquel Raynal írta: > Hello Gabor, > > On 19/07/2025 at 14:06:48 +02, Gabor Juhos wrote: > >> Add two new sysfs device attributes which allows to determine the OOB >> layout used by a given MTD device. This can be useful to verify the >> current layout during driver development without adding extra debug >> code. The exposed information also makes it easier to analyze NAND >> dumps without the need of cravling out the layout from the driver >> code. > > I would prefer a debugfs entry, as this is mostly focusing on > development and debugging purposes. sysfs has a stable API, which makes > it a less relevant place in this case. Sorry, it seems that I misunderstood the ABI documentation. Since the 'sysfs-class-mtd' file is under the 'testing' directory within 'Documentation/ABI' I thought that it can be extended by attributes used for testing purposes. Additionally, the 'oobavail' and 'oobsize' attributes are exposed via sysfs, so it seemed to be a logical place for the new oob related ones. Nevertheless, I will check what can I do with the debugfs based approach. Thanks, Gabor