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| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2023-01-12 10:36:35 +0100 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2023-01-13 17:35:26 +0100 |
| commit | 9f820fc0651c32f8dde26b8e3ad93e1b9fdb62c4 (patch) | |
| tree | 6b9d52607b333012ff9e812c91a51e924a1236b3 /include/linux/mtd | |
| parent | 568494db680991d6a09b5ab92dcddb7dfd3cbe25 (diff) | |
| download | linux-9f820fc0651c32f8dde26b8e3ad93e1b9fdb62c4.tar.gz linux-9f820fc0651c32f8dde26b8e3ad93e1b9fdb62c4.tar.bz2 linux-9f820fc0651c32f8dde26b8e3ad93e1b9fdb62c4.zip | |
mtd: rawnand: Check the data only read pattern only once
Instead of checking if a pattern is supported each time we need it,
let's create a bitfield that only the core would be allowed to fill at
startup time. The core and the individual drivers may then use it in
order to check what operation they should use. This bitfield is supposed
to grow over time.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Tested-by: Liao Jaime <jaimeliao.tw@gmail.com>
Link: https://lore.kernel.org/linux-mtd/20230112093637.987838-2-miquel.raynal@bootlin.com
Diffstat (limited to 'include/linux/mtd')
| -rw-r--r-- | include/linux/mtd/rawnand.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h index dcf90144d70b..28c5dce782dd 100644 --- a/include/linux/mtd/rawnand.h +++ b/include/linux/mtd/rawnand.h @@ -1094,10 +1094,18 @@ struct nand_controller_ops { * * @lock: lock used to serialize accesses to the NAND controller * @ops: NAND controller operations. + * @supported_op: NAND controller known-to-be-supported operations, + * only writable by the core after initial checking. + * @supported_op.data_only_read: The controller supports reading more data from + * the bus without restarting an entire read operation nor + * changing the column. */ struct nand_controller { struct mutex lock; const struct nand_controller_ops *ops; + struct { + unsigned int data_only_read: 1; + } supported_op; }; static inline void nand_controller_init(struct nand_controller *nfc) |