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[81.204.249.205]) by smtp.gmail.com with ESMTPSA id a15-20020a17090680cf00b0099251a40184sm6685749ejx.99.2023.07.15.03.49.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 15 Jul 2023 03:49:19 -0700 (PDT) Message-ID: <2b0dc481-562f-c8df-545e-dcf6548adb07@gmail.com> Date: Sat, 15 Jul 2023 12:49:18 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 From: Johan Jonker Subject: [PATCH v1 2/2] mtd: rawnand: add nand-skip-bbtscan and nand-no-bbm-quirk DT options To: miquel.raynal@bootlin.com Cc: richard@nod.at, vigneshr@ti.com, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <61c84262-cd98-1e60-d95b-9b0492083994@gmail.com> Content-Language: en-US In-Reply-To: <61c84262-cd98-1e60-d95b-9b0492083994@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230715_034921_890338_AE0D0A59 X-CRM114-Status: GOOD ( 10.79 ) 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 A NAND chip can contain a different data format then the MTD framework expects in the erase blocks for the Bad Block Table(BBT). Result is a failed probe, while nothing wrong with the hardware. Some MTD flags need to be set to gain access again. Skip the automatic BBT scan with the NAND_SKIP_BBTSCAN option so that the original content is unchanged during the driver probe. The NAND_NO_BBM_QUIRK option allows us to erase bad blocks with the nand_erase_nand() function and the flash_erase command. Add nand-skip-bbtscan and nand-no-bbm-quirk Device Tree options, so the user has the "freedom of choice" by neutral access mode to read and write in whatever format is needed. Signed-off-by: Johan Jonker --- Previous discussion: [PATCH v3 3/3] mtd: rawnand: rockchip-nand-controller: add skipbbt option https://lore.kernel.org/linux-mtd/1618382560.2326931.1689261435022.JavaMail.zimbra@nod.at/ --- drivers/mtd/nand/raw/nand_base.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index a6af521832aa..f0fa5c3519b1 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -5521,6 +5521,12 @@ static int rawnand_dt_init(struct nand_chip *chip) if (of_property_read_bool(dn, "nand-is-boot-medium")) chip->options |= NAND_IS_BOOT_MEDIUM; + if (of_property_read_bool(dn, "nand-no-bbm-quirk")) + chip->options |= NAND_NO_BBM_QUIRK; + + if (of_property_read_bool(dn, "nand-skip-bbtscan")) + chip->options |= NAND_SKIP_BBTSCAN; + if (of_property_read_bool(dn, "nand-on-flash-bbt")) chip->bbt_options |= NAND_BBT_USE_FLASH; -- 2.30.2 ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/