Messages in this thread Patch in this message | | | Date | Sat, 15 Jul 2023 12:49:18 +0200 | From | Johan Jonker <> | Subject | [PATCH v1 2/2] mtd: rawnand: add nand-skip-bbtscan and nand-no-bbm-quirk DT options |
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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 <jbx6244@gmail.com> ---
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
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