diff options
| 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 /drivers/mtd/nand/raw/nand_base.c | |
| parent | 568494db680991d6a09b5ab92dcddb7dfd3cbe25 (diff) | |
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 'drivers/mtd/nand/raw/nand_base.c')
| -rw-r--r-- | drivers/mtd/nand/raw/nand_base.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c index c3cc66039925..7b87e2e70484 100644 --- a/drivers/mtd/nand/raw/nand_base.c +++ b/drivers/mtd/nand/raw/nand_base.c @@ -4991,6 +4991,24 @@ nand_manufacturer_name(const struct nand_manufacturer_desc *manufacturer_desc) return manufacturer_desc ? manufacturer_desc->name : "Unknown"; } +static void rawnand_check_data_only_read_support(struct nand_chip *chip) +{ + /* Use an arbitrary size for the check */ + if (!nand_read_data_op(chip, NULL, SZ_512, true, true)) + chip->controller->supported_op.data_only_read = 1; +} + +static void rawnand_early_check_supported_ops(struct nand_chip *chip) +{ + /* The supported_op fields should not be set by individual drivers */ + WARN_ON_ONCE(chip->controller->supported_op.data_only_read); + + if (!nand_has_exec_op(chip)) + return; + + rawnand_check_data_only_read_support(chip); +} + /* * Get the flash and manufacturer id and lookup if the type is supported. */ @@ -5023,6 +5041,8 @@ static int nand_detect(struct nand_chip *chip, struct nand_flash_dev *type) /* Select the device */ nand_select_target(chip, 0); + rawnand_early_check_supported_ops(chip); + /* Send the command for reading device ID */ ret = nand_readid_op(chip, 0, id_data, 2); if (ret) |