linux/drivers/mtd/nand
Rouven Czerwinski f6ca3fb697 mtd: rawnand: Ensure the nand chip supports cached reads
Both the JEDEC and ONFI specification say that read cache sequential
support is an optional command. This means that we not only need to
check whether the individual controller supports the command, we also
need to check the parameter pages for both ONFI and JEDEC NAND flashes
before enabling sequential cache reads.

This fixes support for NAND flashes which don't support enabling cache
reads, i.e. Samsung K9F4G08U0F or Toshiba TC58NVG0S3HTA00.

Sequential cache reads are now only available for ONFI and JEDEC
devices, if individual vendors implement this, it needs to be enabled
per vendor.

Tested on i.MX6Q with a Samsung NAND flash chip that doesn't support
sequential reads.

Fixes: 003fe4b954 ("mtd: rawnand: Support for sequential cache reads")
Cc: stable@vger.kernel.org
Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230922141717.35977-1-r.czerwinski@pengutronix.de
2023-10-16 10:47:22 +02:00
..
onenand Raw NAND core changes: 2023-08-28 16:37:38 +02:00
raw mtd: rawnand: Ensure the nand chip supports cached reads 2023-10-16 10:47:22 +02:00
spi mtd: spinand: micron: correct bitmask for ecc status 2023-09-11 17:48:24 +02:00
bbt.c mtd: nand: bbt: Use the bitmap API to allocate bitmaps 2022-09-20 10:06:58 +02:00
core.c mtd: nand: drop EXPORT_SYMBOL_GPL for nanddev_erase() 2022-11-07 17:17:20 +01:00
ecc-mtk.c mtd: nand: ecc-mtk: Add ECC support fot MT7986 IC 2023-02-03 19:09:44 +01:00
ecc-mxic.c mtd: Explicitly include correct DT includes 2023-07-27 17:03:41 +02:00
ecc-sw-bch.c mtd: nand: ecc-bch: Use the public nsteps field 2021-03-11 09:37:28 +01:00
ecc-sw-hamming.c mtd: rawnand: Let callers use the bare Hamming helpers 2021-10-15 12:20:59 +02:00
ecc.c mtd: Explicitly include correct DT includes 2023-07-27 17:03:41 +02:00
Kconfig mtd: nand: MTD_NAND_ECC_MEDIATEK should depend on ARCH_MEDIATEK 2022-05-12 16:43:04 +02:00
Makefile mtd: nand: make mtk_ecc.c a separated module 2022-04-27 18:12:35 +02:00