diff options
| author | Ezra Buehler <ezra.buehler@husqvarnagroup.com> | 2024-01-25 23:01:07 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-03 16:28:58 +0300 |
| commit | 9c74507e6c4382d12a5e418742b81fd441f03313 (patch) | |
| tree | e6ae0d93a7bdad6136e33f05751c22c52c978959 /include | |
| parent | 9ae3954dd36ba324e63bee297e791e19f7d885c6 (diff) | |
| download | linux-9c74507e6c4382d12a5e418742b81fd441f03313.tar.xz | |
mtd: spinand: Add support for 5-byte IDs
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mtd/spinand.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h index 3e285c09d16d..5c2ccc649452 100644 --- 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 |