6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ezra Buehler ezra.buehler@husqvarnagroup.com
commit 34a956739d295de6010cdaafeed698ccbba87ea4 upstream.
E.g. ESMT chips will return an identification code with a length of 5 bytes. In order to prevent ambiguity, flash chips would actually need to return IDs that are up to 17 or more bytes long due to JEDEC's continuation scheme. I understand that if a manufacturer ID is located in bank N of JEDEC's database (there are currently 16 banks), N - 1 continuation codes (7Fh) need to be added to the identification code (comprising of manufacturer ID and device ID). However, most flash chip manufacturers don't seem to implement this (correctly).
Signed-off-by: Ezra Buehler ezra.buehler@husqvarnagroup.com Reviewed-by: Martin Kurbanov mmkurbanov@salutedevices.com Tested-by: Martin Kurbanov mmkurbanov@salutedevices.com Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/20240125200108.24374-2-ezra@easyb.ch Cc: Hauke Mehrtens hauke@hauke-m.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/linux/mtd/spinand.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/mtd/spinand.h +++ b/include/linux/mtd/spinand.h @@ -169,7 +169,7 @@ struct spinand_op; struct spinand_device;
-#define SPINAND_MAX_ID_LEN 4 +#define SPINAND_MAX_ID_LEN 5 /* * For erase, write and read operation, we got the following timings : * tBERS (erase) 1ms to 4ms